Feds mull looser regs on armor-piercing bullets as Obama calls for end to gun violence
While President Barack Obama is calling for a high-level study to come up with ways to end the nation's "epidemic of gun violence" in the wake of last week's schoolhouse massacre, the Bureau of Alcohol, Tobacco, Firearms and Explosives is seeking comments on the possible easing of regulation on armor piercing bullets.
On Dec. 6 - eight days before the tragic shootings at Sandy Hook Elementary school in Newtown, Conn. - the National Rifle Association's Institute for Legislative Action sent out an alert to members urging them to weigh in on the request, which the ATF made after receiving requests from unnamed sources to review its policies. The comments period closes at the end of the month.
Meanwhile, the president has tasked Vice President Joe Biden, pictured right, to lead an interagency group to explore responses to last week's shootings.
Here's the notice, published on the ATF's website:
"ATF is seeking public comments on specific projectiles or projectile cores which may be used in a handgun and which are constructed entirely from one or a combination of tungsten, alloys, steel, iron, brass, bronze, beryllium, copper or depleted uranium, and whether these projectiles or projectile cores pose a threat to public safety and law enforcement, or are, "primarily intended to be used for sporting purposes" and therefore may be exempted from classification as "armor piercing ammunition."
The request for comments - which is not yet part of a formal rulemaking process and therefore is not available on regulations.gov - is in addition to a series of meetings that the ATF held in late November with law enforcement officials, gun control groups, representatives of the firearms industry, and gun rights groups according to this document posted on the ATF website.
At issue: ammunition that is banned for handguns under a 1986 law because it can pierce body armor. The purpose of the law, says the ATF, was "to protect law enforcement officers by regulating the ammunition that could be loaded into a handgun and would penetrate an officer's bullet resistant vest."
However, law provides for an exemption from the definition for any projectile "which the Attorney General finds is primarily intended to be used for sporting purposes."
With large caliber handguns now being manfactured that take rifle-caliber bullets, there are requests for an exemption so that certain ammunition that can be used in both rifles and handguns remain legal.
The ATF says it is caught between two problems--protecting police officers versus the rights of hunters. "In developing ATF's criteria, we recognize that a broad exemption will necessarily encompass many projectiles that may pose a danger to law enforcement officers," says the agency. "However, in developing a narrow sporting purposes test, ammunition in traditional hunting calibers will become regulated."
Kristen Rand, legislative director for the Violence Policy Center, a nonprofit group that works to reduce violence, says any change in the rule would be a mistake. "There is no rationale that would justify allowing the sale of any handgun ammunition that can pierce body armor and endanger first responders," she told Sunlight.
Comments are due by Dec. 31. A call to the ATF was not returned by the time of this posting. Sunlight has filed a Freedom of Information Act request for the comments submitted to the ATF, as well as records of the meetings the agency held with stakeholders.
2012年12月19日星期三
2012年12月11日星期二
Tungsten Copper Age Returns
How much thought have you given to copper recently? My guess is that the answer is “not much” or “none at all.” I’d probably have said the same myself until recently, when I read Bill Carter’s fascinating new book, Boom, Bust, Boom. Its central theme is the author’s ongoing struggle with his conscience: how is he to reconcile his disgust with the ugliness of the copper-mining industry -- the yawning pits, the sulfuric acid dripping through mountains of crushed rock, the acid mine drainage -- with his dependence on copper for every aspect of his everyday life? And that includes his dreams of a future economy powered by renewable energy.
I was forcefully reminded of Carter’s dilemma last week by a news item from newly democratic Myanmar, once known as Burma. It concerned a copper mine called Letpadaung. This began life as a 50-50 joint venture between a Canadian company, Ivanhoe Mines, and the military government of Myanmar. Two years ago, Ivanhoe’s share was bought out by a subsidiary of the giant state-owned Chinese company NORINCO -- the China North Industries Corporation. NORINCO is best known as a manufacturer of weapons systems for the People’s Liberation Army, though its tentacles also reach into engineering and infrastructure projects such as highways, dams, power plants, and subway systems; precision optics; retail vehicle sales; and microelectronics; as well as mining. Think of it as Halliburton, IBM, and Lockheed Martin all rolled into one.
Last Thursday, riot police used water cannons, tear gas, and incendiary devices to attack a peaceful encampment of protesters at the Letpadaung mine site -- an assortment of Buddhist monks, peasants complaining of illegal land seizures, and activists taking advantage of the country’s recent democratic opening -- who had been protesting for months against a proposed billion-dollar expansion. When the raid was over, dozens were injured; videos from a local hospital showed saffron-robed monks disfigured by burns.
This was just the latest in a string of similar events around the world. Five protesters against a new gold and copper mine were killed in Peru while I was there earlier this year (a story I tell in the current issue of OnEarth); a few weeks earlier, two more Peruvians had died during protests against another copper mine; and just days before the Myanmar attack, the Democratic Republic of Congo saw a new warlord and accused war criminal, Bosco "The Terminator" Ntaganda, seize control of the province of North Kivu. The endless bloodletting in North Kivu is explained by the fact that it contains some of the richest mineral deposits on the planet -- including copper, gold, cobalt, tungsten, and 70 percent of the world’s supply of tantalum, a mineral critical to our cell phones, tablets, and computers.
I was forcefully reminded of Carter’s dilemma last week by a news item from newly democratic Myanmar, once known as Burma. It concerned a copper mine called Letpadaung. This began life as a 50-50 joint venture between a Canadian company, Ivanhoe Mines, and the military government of Myanmar. Two years ago, Ivanhoe’s share was bought out by a subsidiary of the giant state-owned Chinese company NORINCO -- the China North Industries Corporation. NORINCO is best known as a manufacturer of weapons systems for the People’s Liberation Army, though its tentacles also reach into engineering and infrastructure projects such as highways, dams, power plants, and subway systems; precision optics; retail vehicle sales; and microelectronics; as well as mining. Think of it as Halliburton, IBM, and Lockheed Martin all rolled into one.
Last Thursday, riot police used water cannons, tear gas, and incendiary devices to attack a peaceful encampment of protesters at the Letpadaung mine site -- an assortment of Buddhist monks, peasants complaining of illegal land seizures, and activists taking advantage of the country’s recent democratic opening -- who had been protesting for months against a proposed billion-dollar expansion. When the raid was over, dozens were injured; videos from a local hospital showed saffron-robed monks disfigured by burns.
This was just the latest in a string of similar events around the world. Five protesters against a new gold and copper mine were killed in Peru while I was there earlier this year (a story I tell in the current issue of OnEarth); a few weeks earlier, two more Peruvians had died during protests against another copper mine; and just days before the Myanmar attack, the Democratic Republic of Congo saw a new warlord and accused war criminal, Bosco "The Terminator" Ntaganda, seize control of the province of North Kivu. The endless bloodletting in North Kivu is explained by the fact that it contains some of the richest mineral deposits on the planet -- including copper, gold, cobalt, tungsten, and 70 percent of the world’s supply of tantalum, a mineral critical to our cell phones, tablets, and computers.
2012年12月10日星期一
Tungsten Copper Rod
Tungsten copper rod is a combination of tungsten and copper.
The manufacturing process is as follows: press the refractory metal, sinter the pressed compact at a high temperature, and infiltrate it with copper. All this is done under very closely controlled conditions. The result is a relatively hard material with superior arc and wear resistance, high physical Properties: at elevated temperatures, and good electrical and thermal conductivity.
2012年12月9日星期日
Copper Tungsten Alloy Refractory Metal Composites
Eagle refractory metal composite materials are a combination of tungsten or tungsten carbide combined with copper or silver. The manufacturing process is to press the refractory (tungsten or tungsten carbide), sinter the pressed compact at a high temperature, and infiltrate with copper or silver. All this is done under very closely controlled conditions. The result is a relatively hard materials with superior arc and wear resistance, high physical properties at elevated temperatures, and good electrical and thermal conductivity.
2012年12月5日星期三
Tungsten Copper Military Shaped Charge Liner
Tungsten copper military shaped charge liner is part of armor-piercing projectile which plays an important role in action. Commonly used shaped charge liner is taper angle form. Generally, cone angle is ranging from 120 to 160 degrees.
Armor-piercing projectile rely on kinetic energy of the projectile to penetrate armor and destroy the target. Armor-piercing projectile are high velocity, long shooting distance and high precision of shooting, is the main ammunition of tank guns and the anti-tank guns. It also used in naval gun, coastal gun , anti-aircraft artillery and airborne cannon and used for mutilating tanks, self-propelled guns, armored vehicles, ships, aircraft, etc.
The theory of tungsten copper military shaped charge liner is called cavity effect .When the armor-piercing projectile detonates, the high temperature and high pressure instantaniously melting shaped charge ,then forming high temperature and speed metal jet which can sear even burnthrough the armored steel. So it is show that armor-piercing projectile take effective action by the cavity effect rather than rely on the kinetic energy.
Armor-piercing projectile’s armor ability is different when adopting different material of shaped charge. Copper used as material for shaped charge liner with low melting point and good ductility, however the density of copper is low and easily deformation, so it commonly mixed with tungsten to improve the density, which increase the armor ability of tungsten copper military shaped charge liner.
Armor-piercing projectile rely on kinetic energy of the projectile to penetrate armor and destroy the target. Armor-piercing projectile are high velocity, long shooting distance and high precision of shooting, is the main ammunition of tank guns and the anti-tank guns. It also used in naval gun, coastal gun , anti-aircraft artillery and airborne cannon and used for mutilating tanks, self-propelled guns, armored vehicles, ships, aircraft, etc.
The theory of tungsten copper military shaped charge liner is called cavity effect .When the armor-piercing projectile detonates, the high temperature and high pressure instantaniously melting shaped charge ,then forming high temperature and speed metal jet which can sear even burnthrough the armored steel. So it is show that armor-piercing projectile take effective action by the cavity effect rather than rely on the kinetic energy.
Armor-piercing projectile’s armor ability is different when adopting different material of shaped charge. Copper used as material for shaped charge liner with low melting point and good ductility, however the density of copper is low and easily deformation, so it commonly mixed with tungsten to improve the density, which increase the armor ability of tungsten copper military shaped charge liner.
Tungsten Copper Military Alloy
There are many methods making tungsten copper military alloy.
Traditionally, tungsten copper military alloy making commonly adopt copper permeability and liquid sintering technique. However as tungsten and copper indissolve each other and the sintering sex also poorer, it is difficult to implement fully sintering to optimize dense and form the uniform microstructure, and also hard to flexible adjustment of composition of copper tungsten. The followings are the commonly.
Infiltration Method
Infiltration method is that firstly prepare fixed density and strength of porous tungsten substrate skeleton, than infiltrate low melting point mental copper into the tungsten skeleton.
The mechanism of infiltration method is when the liquid copper wetting tungsten porous substrate, under capillary pressure, the liquid copper flow long with the particle’s porous skeleton and padding the porous skeleton, resulting in comprehensive good materials.
The merits of tungsten copper military alloy made from this method are high density, good sintering performance, good thermal and electricity conductivity. However, this tungsten copper military alloy needs further machining, which increase the machining cost, reduce the yield.
High temperature liquid sintering method
As there is a huge distance between the tungsten and copper of the melting point, so we can adopt high temperature liquid sintering method to make tungsten copper military alloy, through which densificate its density at the temperature higher than copper melting point.
This method’s advantage is that the processing is simple and easily control, while high sintering temperature, long sintering time and low sintering density which make the finished products can not meet the requirements of usage. In order to improve the density, repress, hot –press and hot forging after liquid sintering.
Arc melting method
Arc melting method is making into electrode with the copper tungsten, then melting in the arc furnace, so tiny grain, low density ,high densify and good corrosion resistance tungsten copper military alloy come out.
Traditionally, tungsten copper military alloy making commonly adopt copper permeability and liquid sintering technique. However as tungsten and copper indissolve each other and the sintering sex also poorer, it is difficult to implement fully sintering to optimize dense and form the uniform microstructure, and also hard to flexible adjustment of composition of copper tungsten. The followings are the commonly.
Infiltration Method
Infiltration method is that firstly prepare fixed density and strength of porous tungsten substrate skeleton, than infiltrate low melting point mental copper into the tungsten skeleton.
The mechanism of infiltration method is when the liquid copper wetting tungsten porous substrate, under capillary pressure, the liquid copper flow long with the particle’s porous skeleton and padding the porous skeleton, resulting in comprehensive good materials.
The merits of tungsten copper military alloy made from this method are high density, good sintering performance, good thermal and electricity conductivity. However, this tungsten copper military alloy needs further machining, which increase the machining cost, reduce the yield.
High temperature liquid sintering method
As there is a huge distance between the tungsten and copper of the melting point, so we can adopt high temperature liquid sintering method to make tungsten copper military alloy, through which densificate its density at the temperature higher than copper melting point.
This method’s advantage is that the processing is simple and easily control, while high sintering temperature, long sintering time and low sintering density which make the finished products can not meet the requirements of usage. In order to improve the density, repress, hot –press and hot forging after liquid sintering.
Arc melting method
Arc melting method is making into electrode with the copper tungsten, then melting in the arc furnace, so tiny grain, low density ,high densify and good corrosion resistance tungsten copper military alloy come out.
2012年12月4日星期二
Copper tungsten PCD disk erosion electrode
Our copper tungsten rotary electrode has high physical and mechanical properties to answer the PCD tools disk erosion need. We put lots of effort research and optimize our process to develop quality product for this application. Our copper tungsten alloys are designated as ASTM B702, RWMA Class 10, RWMA Class 11, RWMA Class 12, GB/T8320-2003.
Copper tungsten electrode for EDM PCD tools disk erosion has below advantage:
-High electrical conductivity and regular component maintain electrical plus generator stable.
-High thermal conductivity guarantee PCD without damage by heat.
-High density make sure PCD insert surface has the lowest roughness.
Copper tungsten Bi-Metal Alloy plate
Our copper tungsten bimetal product is created for EDM electrode and electrical contact rivet. Copper tungsten bi-metal plate is made by diffusing bonding technology. it is very reliable and cost saving solution can be quickly replaced without machine break down. Multiple electrode assembly bring the high efficiency of operation.
EDM copper tungsten bimetal electrode bond the copper tungsten and iron metal, iron side magnetic adsorption on the base working plate, and copper tungsten side maintain the good wearing to machining the precision mould working piece.
Copper tungsten thread tapping electrode
Copper tungsten thread tapping use for EDMing due to it unmatched wear resistance, together with very well in sharp corner and machined without burr issues associated with copper. Our copper tungsten alloy is made by PSI(press-sinter- infiltration) process which bring higher quality than the conventional PS(Mix.-press-sinter) process to virtually eliminates the alloy porosity issue.
Our Copper tungsten thread tapping has below advantage:
• Maturity press- sinter- infiltration process without porosity issue.
• High electrical conductivity get rapid cutting speed.
• Different tungsten ratio product available depend on the demanding.
Our Copper tungsten thread tapping has below advantage:
• Maturity press- sinter- infiltration process without porosity issue.
• High electrical conductivity get rapid cutting speed.
• Different tungsten ratio product available depend on the demanding.
2012年11月28日星期三
Copper Tungsten Products of Chinatungsten
We use the best tungsten copper which is much stronger due to it being composed of an even sturdier alloy.
This sintered tungsten copper alloy may be used in heavy spot and projection welding projects. Our tungsten copper is manufactured metallurgically and contains 70-90% tungsten. The structure is smooth, very hard and has high elasticity. The most important reasons for Brouwer Metaal to work with tungsten copper is its unrivalled versatility. We use tungsten copper in our products, because it has a very high melting point and this results in a very stable and safe product. Additionally, tungsten copper is a very good conductor this allows it to be used in electrodes that you use in resistance welding.
The products designed by us, Brouwer Metaal, are guaranteed to have been tested thoroughly in relation to all international guidelines. This ensures a high quality product allows you to do your resistance welding with the greatest precision. The construction of this alloy permits a degree of reliability and makes sure that as customer you do not need to hesitate anymore whether the welding will break or not.
For more information on how to obtain this product you can consult our webpage or phone us at the number mentioned on our homepage.
More information can be seen by choosing in the menu on the top. If you would like to receive more specific information regarding our products, please fill in the form on the left.
This sintered tungsten copper alloy may be used in heavy spot and projection welding projects. Our tungsten copper is manufactured metallurgically and contains 70-90% tungsten. The structure is smooth, very hard and has high elasticity. The most important reasons for Brouwer Metaal to work with tungsten copper is its unrivalled versatility. We use tungsten copper in our products, because it has a very high melting point and this results in a very stable and safe product. Additionally, tungsten copper is a very good conductor this allows it to be used in electrodes that you use in resistance welding.
The products designed by us, Brouwer Metaal, are guaranteed to have been tested thoroughly in relation to all international guidelines. This ensures a high quality product allows you to do your resistance welding with the greatest precision. The construction of this alloy permits a degree of reliability and makes sure that as customer you do not need to hesitate anymore whether the welding will break or not.
For more information on how to obtain this product you can consult our webpage or phone us at the number mentioned on our homepage.
More information can be seen by choosing in the menu on the top. If you would like to receive more specific information regarding our products, please fill in the form on the left.
Tungsten Copper Rod Chinatungsten Provide
We are very proud that we have offered more 1000 clients with thousands types expected tungsten products successfully from the year 1997. If you have any demand of tungsten & molybdenum, please let's know it without any hesitation, we'll try our best to assistant your complete the design, produce, machining, grounding & delivery ASAP. Also we promise you: We have neither minimum order, nor small customer, and we are not offering only our qualified products but also the designing, solution and the best service, prompt delivery at the most competitive prices for our motto is: Our Business Is Nothing But Your Success.
Chinatungsten Online are provide different sizes tungsten copper rods as following sheet:
Chinatungsten Online are provide different sizes tungsten copper rods as following sheet:
| Diameter |
D2,
D3,D4,D5,D6,D7,D8,D10,D12,D14,D15,D16,D18,D20,D21,D22,D25,D30,D35,D40,D45
|
| Length |
100, 200, 300
|
2012年11月26日星期一
Tungsten Copper for Low Voltage Electrode
Tungsten Copper for Low Voltage Electrode Contact Application
Low Voltage Electrode Contact Application-1
Automotive electrical contacts
Car electrical contacts are typically pure tungsten rod cutting, brazed tungsten the surface oxide layer, if long-term placement will produce automotive electrical failure phenomenon tungsten copper alloy rod to ensure that the contact has good electrical conductivity, resistance to arc erosion and oxidation-resistant performance.
Low Voltage Electrode Contact Application-2
Medical equipment with discharge board
The human crusher, pulse ray generator equipment in high-voltage, high-current discharge electrodes, tungsten copper alloy with copper one way of making, not only to ensure good electrical conductivity of the electrode, arc erosion resistance, and solve the electrodes connectivity issues.
Low Voltage Electrode Contact Application-3
The Overall Electrical Contacts
The arc current 380V contactors, switches, etc. used finger brazing copper and contacts connections occurred often in the process of using high temperatures lead to melting of the brazing layer to produce U-turn phenomenon. Tungsten copper produced by the method of the overall sintered integrally arc contact means to solve the above problems, and to reduce the production processes.
Low Voltage Electrode Contact Application-4
Other applications
Tungsten-copper alloy has a high melting point, high electrical conductivity and good ablation resistance; it can be used in many electrical fields.
Low Voltage Electrode Contact Application-1
Automotive electrical contacts
Car electrical contacts are typically pure tungsten rod cutting, brazed tungsten the surface oxide layer, if long-term placement will produce automotive electrical failure phenomenon tungsten copper alloy rod to ensure that the contact has good electrical conductivity, resistance to arc erosion and oxidation-resistant performance.
Low Voltage Electrode Contact Application-2
Medical equipment with discharge board
The human crusher, pulse ray generator equipment in high-voltage, high-current discharge electrodes, tungsten copper alloy with copper one way of making, not only to ensure good electrical conductivity of the electrode, arc erosion resistance, and solve the electrodes connectivity issues.
Low Voltage Electrode Contact Application-3
The Overall Electrical Contacts
The arc current 380V contactors, switches, etc. used finger brazing copper and contacts connections occurred often in the process of using high temperatures lead to melting of the brazing layer to produce U-turn phenomenon. Tungsten copper produced by the method of the overall sintered integrally arc contact means to solve the above problems, and to reduce the production processes.
Low Voltage Electrode Contact Application-4
Other applications
Tungsten-copper alloy has a high melting point, high electrical conductivity and good ablation resistance; it can be used in many electrical fields.
2012年11月25日星期日
Copper Tungsten Tubing for EDM
Copper tungsten tubing can be used to EDM hole drill in all material types. Copper tungsten, because of it’s molecular composition tends to last longer during hole burning compared mostly to Brass.
One unique characteristic of copper tungsten is that it is ideal when small hole drilling through very hard materials such as Carbide and Tungsten. This is because it has a slower and more steady burn rate that will measure up stronger. When EDM holeburning through a depth to width ratio of greater than 100 to 1 this also tends to be ideal because a more controlled hole burn will leave a more accurate and straighter hole.
The Copper tungsten tubing that we supply is 99.995% pure.
Single Hole Electrode Tubes vs. Multi-Channel Electrode Tubes
Another variable which determines the ultimate success of the electrode properly EDM Hole Burning through the material or work piece is if the Brass Electrode or Copper Electrode tube has a “single hole” or a “multi channeled hole” running directly through the ID or (Internal Diameter) of the electrode.
Basically put; in order for an electrode to perform the way it’s supposed to, it depends on the type of hole going through the center of the electrode. This type of hole has a few purposes. One purpose is to direct water or coolant through the center of the electrode. This keeps the entire length of the Brass or Copper Tube from overheating and burning up. If the electrode heats up too much it can become “soft” and warp thus not creating a straight line or a consistent and accurate EDM Hole.
The main reason that determines whether an EDM Electrode tube would have a “single hole” or a “multi-channel” / “coreless” hole is that when a hole is EDM Machined into a part it could be a “thru hole” or a “blind hole”. Blind holes are not drilled complete to the other side so a “slug” or a piece of material is still left untouched at the bottom of the hole.
One unique characteristic of copper tungsten is that it is ideal when small hole drilling through very hard materials such as Carbide and Tungsten. This is because it has a slower and more steady burn rate that will measure up stronger. When EDM holeburning through a depth to width ratio of greater than 100 to 1 this also tends to be ideal because a more controlled hole burn will leave a more accurate and straighter hole.
The Copper tungsten tubing that we supply is 99.995% pure.
Single Hole Electrode Tubes vs. Multi-Channel Electrode Tubes
Another variable which determines the ultimate success of the electrode properly EDM Hole Burning through the material or work piece is if the Brass Electrode or Copper Electrode tube has a “single hole” or a “multi channeled hole” running directly through the ID or (Internal Diameter) of the electrode.
Basically put; in order for an electrode to perform the way it’s supposed to, it depends on the type of hole going through the center of the electrode. This type of hole has a few purposes. One purpose is to direct water or coolant through the center of the electrode. This keeps the entire length of the Brass or Copper Tube from overheating and burning up. If the electrode heats up too much it can become “soft” and warp thus not creating a straight line or a consistent and accurate EDM Hole.
The main reason that determines whether an EDM Electrode tube would have a “single hole” or a “multi-channel” / “coreless” hole is that when a hole is EDM Machined into a part it could be a “thru hole” or a “blind hole”. Blind holes are not drilled complete to the other side so a “slug” or a piece of material is still left untouched at the bottom of the hole.
2012年11月22日星期四
Tungsten Copper for Instant High Temperature Material
Tungsten copper alloy, the copper content of the alloys in common for 10% to 50%.System alloy powder metallurgy method has a good electrical and thermal conductivity, preferably of high-temperature strength and certain plasticity. At very high temperatures, such as more than 3000 ℃, a copper alloy is liquefied evaporation, a large number of absorbing heat, reducing the temperature of the material surface. Therefore, such material is also known as metal sweating. Wider use of tungsten copper alloy, is mainly used to manufacture high voltage electrical arc ablation resistance switch contacts and the rocket nozzle throat insert, rudder and other high temperature components, is also used as the electrode electrically processing, high temperature molds as well as other requirements of thermal conductivity properties and high-temperature use of the occasion. First tungsten copper selection of fine tungsten, copper powder refined by leading soaked sintering process, can withstand nearly 2,000 high temperature and high stress, has a high melting point, high hardness, resistance to burning and good anti-adhesion, electrical erosion surface of the product finish high, very high precision, low loss. Tungsten and copper is widely used as a high-pressure, super-hydraulic switch and circuit breaker contacts, protection ring for electric upsetting anvil block material conductive Tsui, automatic submerged arc welding, plasma cutting machine nozzle, welding machines, welding machines welding head seam welding wheel the gas sealing Mao electrode and point spark electrodes, spot welding, touch welding materials.
The advantages of tungsten copper alloy combined of copper and tungsten, which include high-strength, high density, high temperature resistance, arc ablation, conductive electric performance, processing performance. High quality tungsten powder and oxygen-free copper powder, application isocratic pressing, to ensure the purity of the product, and accurate ratio, organized crime, performance arc breaking performance, good electrical conductivity, thermal conductivity thermal expansion. Tungsten copper material is a preferred material to meet the above requirements.
The advantages of tungsten copper alloy combined of copper and tungsten, which include high-strength, high density, high temperature resistance, arc ablation, conductive electric performance, processing performance. High quality tungsten powder and oxygen-free copper powder, application isocratic pressing, to ensure the purity of the product, and accurate ratio, organized crime, performance arc breaking performance, good electrical conductivity, thermal conductivity thermal expansion. Tungsten copper material is a preferred material to meet the above requirements.
2012年11月19日星期一
Applications of Tungsten Copper Composites
Copper tungsten alloys are used where the combination of high heat resistance, high electrical and/or thermal conductivity, and low thermal expansion are needed. Some of the applications are in electric resistance welding, as electrical contacts, and as heat sinks. As contact material the alloy is resistant to erosion by electric arc. Tungsten copper alloys are also used in electrodes for electrical discharge machining and electrochemical machining.
The CuW75 tungsten copper alloy, with 75% of tungsten, is widely used in chip carriers, substrates, flanges and frames for power semiconductor devices. The high thermal conductivity of copper together with the low thermal expansion of tungsten allows thermal expansion matching to silicon, gallium arsenide, and some ceramics.
Copper Tungsten alloy with 70-90% of tungsten is used in liners of some specialty shaped charges. The penetration is enhanced by factor 1.3 against copper for homogeneous steel target, as both the density and the break-up time are increased. Tungsten powder based shaped charge liners are especially suitable for oil well completion. Other ductile metals can be used as binder in place of copper as well. Graphite can be added as lubricant to the powder.
The manufacturing process of Tungsten copper alloy is to press the refractory (tungsten or tungsten carbide), sinter the pressed compact at a high temperature, and infiltrate with copper. All of this is done under very closely controlled conditions. The mechanical and physical properties of Tungsten copper alloy vary with composition. The thermal and electrical conductivity increase with the amount of copper, while the hardness, strength, and resistance to mechanical wear increase with the amount of tungsten or tungsten carbide. The application determines the material choice.
The CuW75 tungsten copper alloy, with 75% of tungsten, is widely used in chip carriers, substrates, flanges and frames for power semiconductor devices. The high thermal conductivity of copper together with the low thermal expansion of tungsten allows thermal expansion matching to silicon, gallium arsenide, and some ceramics.
Copper Tungsten alloy with 70-90% of tungsten is used in liners of some specialty shaped charges. The penetration is enhanced by factor 1.3 against copper for homogeneous steel target, as both the density and the break-up time are increased. Tungsten powder based shaped charge liners are especially suitable for oil well completion. Other ductile metals can be used as binder in place of copper as well. Graphite can be added as lubricant to the powder.
The manufacturing process of Tungsten copper alloy is to press the refractory (tungsten or tungsten carbide), sinter the pressed compact at a high temperature, and infiltrate with copper. All of this is done under very closely controlled conditions. The mechanical and physical properties of Tungsten copper alloy vary with composition. The thermal and electrical conductivity increase with the amount of copper, while the hardness, strength, and resistance to mechanical wear increase with the amount of tungsten or tungsten carbide. The application determines the material choice.
2012年11月18日星期日
Tungsten Copper Rod for EDM
Our tungsten copper rod for EDM die and mould application has below advantage:
-High electrical conductivity bring very good erosion rate. Improve productivity.
-High hardness maintains long life time.
-High density characters present the lowest corner wear.
-Dia. 1mm rod bend demo shows our super infiltration process control capability.
Our tungsten copper rod for EDM die and mould application has below advantage:
-High electrical conductivity bring very good erosion rate. Improve productivity.
-High hardness maintains long life time.
-High density characters present the lowest corner wear.
-Dia. 1mm rod bend demo shows our super infiltration process control capability.
2012年11月16日星期五
Applications for Copper Tungsten Bar
Because of the high electrical conductivity and low consumption, Copper tungsten bars are widely used to make Grid siderod, Lead, Support, and Electrode for the Gas discharge lamp.
1. Resistance welding electrode
It integrates such features of tungsten and copper as high temperature resistance, electrical arc ablation resistance, high proportion, good electrical and heat conductivity, being easy to cut and transpiration cooling. It also owns such advantages of tungsten as high hardness, melting point and adherence resistance. It is often used for projection welding and butt-welding electrode with wear and high temperature resistance.
2. Electric spark electrode
It is used for the electrode of mould made from tungsten steel and high-temperature and ultra hard alloy. The common electrode has high consumption and low rate. The high electrical ablation rate, low consumption ratio, precise electrode size and quality processing performance of Copper tungsten can ensure that the precision of the work piece is greatly enhanced.
3. High-voltage discharge tube electrode
When the high-voltage vacuum discharge tube is working, the temperature of contact material will rise to thousands degree centigrade within several tenths seconds. High ablation resistance, high toughness, good electrical and heat conductivity of Copper tungsten provide necessary conditions to stable operation of the discharge tube.
4. Electrical seal material
It owns not only the low expansion of tungsten and high heat conductivity of copper. Its expansion index and heat conductivity can also be changed through changing the content of the materials, which provides convenience to the using of the material. We can supply various specifications and the Copper tungsten alloys with different tungsten proportions.
2012年11月14日星期三
Copper tungsten electrical contacts
The high Electrical & thermal conductivity of copper are combined with the arc-resistant & non-welding properties of tungsten or their carbides to form an extensive series of compositions each designed to give the best performance for your particular application. These materials are used for such heavy duty contact applications as:
*Circuit breakers, air & oil immersed
*Arcing tips or arc runners
*Make & break contacts
*Heavy duty conductors, relays & switches.
Copper tungsten product standard
The high electrical and thermal conductivity of tungsten copper alloy allows a cool, effective transfer of power, while the excellent arc-resistance properties of tungsten copper minimize arc erosion and transfer problems. These characteristics can be varied by composition more silver or copper yields higher electrical and thermal conductivity, while a higher refractory metal content results in superior arc erosion properties. We offer a variety of composites to meet your demands. Regardless of the environment (oil-filled devices, air and gas circuit breakers, contactors, high voltage switch gear) or the application (arcing contacts and plates, arc runners, current carrying members and blade facings), you won't be disappointed in electrical contacts made from our copper tungsten composites.
2012年11月12日星期一
Copper Tungsten Alloy Rod
1, Copper tungsten rod, Copper tungsten round bar
2, Diameter: 1.5-100.0mm
3, Length: 50-1000mm
4, Density: 12.60-17.05 g/cm3
5, Composition: W 55-90%, Cu 10-45%
6, Surface: Sintering surface, Forged surface, Ground surface
Copper tungsten Alloy (WCu) is the composite of tungsten and copper which own excellent performance of tungsten and copper. It is used widely in such industries as engine, electric power, electron, metallurgy, spaceflight and aviation.
The manufacturing process is as follows: press the refractory metal, sinter the pressed compact at a high temperature, and infiltrate it with copper. All this is done under very closely controlled conditions. The result is a relatively hard material with superior arc and wear resistance, high physical Properties: at elevated temperatures, and good electrical and thermal conductivity.
2012年11月11日星期日
Copper Tungsten Sheet
Copper tungsten sheet introduction1, Main grades: CuW50, CuW55, CuW60, CuW65, CuW70, CuW85
2, Length: 5mm-200mm
3, Width: 5mm-200mm
4, Thickness: 0.1mm-5.0mm
5, Semi-finished or finished (Ni/Au plated) products available
Copper tungsten sheet is a composite of tungsten and copper. The coefficient of thermal expansion (CTE) of the composite can be designed by controlling the content of tungsten, matching that of the materials, such as Ceramics (Al2O3, BeO), Semiconductors (Si), Metals (Kovar), etc. The products are widely application in the fields such as radio frequency, microwave, high power diode packaging and optical communication system.
It owns not only the low expansion of tungsten and high heat conductivity of copper. Its expansion index and heat conductivity can also be changed through changing the content of the materials, which provides convenience to the using of the material. We can supply various specifications and the Copper tungsten sheet with different tungsten proportions.
2, Length: 5mm-200mm
3, Width: 5mm-200mm
4, Thickness: 0.1mm-5.0mm
5, Semi-finished or finished (Ni/Au plated) products available
Copper tungsten sheet is a composite of tungsten and copper. The coefficient of thermal expansion (CTE) of the composite can be designed by controlling the content of tungsten, matching that of the materials, such as Ceramics (Al2O3, BeO), Semiconductors (Si), Metals (Kovar), etc. The products are widely application in the fields such as radio frequency, microwave, high power diode packaging and optical communication system.
It owns not only the low expansion of tungsten and high heat conductivity of copper. Its expansion index and heat conductivity can also be changed through changing the content of the materials, which provides convenience to the using of the material. We can supply various specifications and the Copper tungsten sheet with different tungsten proportions.
2012年11月8日星期四
Application of tungsten copper
Tungsten copper alloy combines the advantages of tungsten and copper, which the high melting point of tungsten (tungsten melting point of 3410 ℃, coppermelting point 1080 ℃), Highdensity (density of tungsten 19.34g/cm, copper density 8.89/cm3); excellent thermal conductivity properties of copper, tungsten copper alloy (composition generally ranges WCu7 ~ WCu50) uniform micro structure,high temperature, high strength, resistance to arc erosion, density; conductivity,moderate thermal conductivity, high temperature materials are widely used in military, high-voltage switch with electrical alloy, EDM electrodes,microelectronics materials, parts and components are widely used as aerospace, aviation, electronic, electric power, metallurgy, machinery, sports equipment and other industries.
2012年11月7日星期三
Chromium Copper Alloy
Overview
Chromium copper alloys are high copper alloys, containing 0.6 to 1.2% Cr. The chromium copper alloys are used for their high strength, corrosion resistance and electrical conductivity. The chromium copper alloys are age hardenable, which, in this case, means that a change in properties occurs at elevated temperature due to the precipitation of chromium out of the solid solution. The strength of fully aged chromium copper is nearly twice that of pure copper and its conductivity remains high at 85% IACS, or 85% that of pure copper. These high strength alloys retain their strength at elevated temperatures. The corrosion resistance of chromium copper alloys is better than that of pure copper because chromium improves the chemical properties of the protective oxide film. Chromium copper has excellent cold formability and good hot workability. It is used in applications such as resistance welding electrodes, seam welding wheels, switch gears, cable connectors, circuit breaker parts, molds, spot welding tips, and electrical and thermal conductors that require strength. Chromium copper alloys are designated as UNS C18050 through C18600, the cast alloys are C81400 through C81540.
2012年11月6日星期二
Tungsten Copper Alloy Heat Sink Advantages
High thermal conductivity
Excellent hermeticity
Excellent flatness, surface finish, and size control
Semi-finished or finished (Ni/Au plated) products available
It is a composite of tungsten and copper. By controlling the content of tungsten, we can design its coefficient of thermal expansion (CTE), matching that of the materials, such as Ceramics (Al2O3, BeO), Semiconductors (Si), Kovar, etc.
Our tungsten copper composites to be used extensively in thermal mounting plates, chip carriers, flanges, and frames for high-powered electronic devices. With the thermal advantages of copper with the very low expansion characteristics of tungsten, tungsten copper has properties similar to those of silicone carbide, aluminum oxide, and beryllium oxide. The thermal conductivity and low expansion also make tungsten copper alloy an excellent choice even for extremely dense circuits.
2012年11月5日星期一
Tungsten Copper Alloy Heat Sink
A heat sink uses its extended surfaces to increase the surface area in contact with the cooling fluid, the air for example. The term is not meant literally, as a heat sink does not have a "magical ability to absorb heat like a sponge and send it off to a parallel universe". Heat transfer theory helps explain practical aspects of how heat sinks work, and can also help to clear up common misconceptions and design mistakes. Approach air velocity, choice of material, fin (or other protrusion) design and surface treatment are some of the design factors which influence the thermal resistance, i.e. thermal performance, of a heat sink. One engineering application of heat sinks is in the thermal management of electronics, often computer CPU or graphics processors. For these, heat sink attachment methods and thermal interface materials also influence the eventual junction or die temperature of the processor(s). Theoretical, experimental and numerical methods can be used to determine a heat sink's thermal performance.
Tungsten Copper high performance composites are fabricated from carefully controlled porous tungsten that is vacuum infiltrated with molten copper. This results in a WCu composite that has high conductivity and a matched low thermal expansion for heat sinks.
The CuW75 tungsten copper alloy is used extensively in thermal mounting plates, chip carriers, flanges, and frames for high-power electronic devices. As a tungsten copper material, it's a composite, so both the thermal advantages of copper and the very low expansion characteristics of tungsten can be utilized.
The combination of tungsten & copper materials results in thermal expansion characteristics similar to those of silicone carbide, aluminum oxide, and beryllium oxide, used as chips and substrates. Because of tungsten copper's thermal conductivity and expansion characteristics, Tungsten copper alloy works well in densely packed circuits.
Tungsten Copper high performance composites are fabricated from carefully controlled porous tungsten that is vacuum infiltrated with molten copper. This results in a WCu composite that has high conductivity and a matched low thermal expansion for heat sinks.
The CuW75 tungsten copper alloy is used extensively in thermal mounting plates, chip carriers, flanges, and frames for high-power electronic devices. As a tungsten copper material, it's a composite, so both the thermal advantages of copper and the very low expansion characteristics of tungsten can be utilized.
The combination of tungsten & copper materials results in thermal expansion characteristics similar to those of silicone carbide, aluminum oxide, and beryllium oxide, used as chips and substrates. Because of tungsten copper's thermal conductivity and expansion characteristics, Tungsten copper alloy works well in densely packed circuits.
2012年11月4日星期日
Tungsten Carbide Copper Rod
Copper tungsten alloys are commonly used in EDM electrodes and other electrical and electrical/thermal applications. They are also used for facing and inserts for flash and butt welding dies, projection welding electrodes, seam welding bearing inserts and facing for electro-forming and electro-forging dies.
Although they are somewhat more difficult to machine, tungsten carbide copper materials provide high mechanical properties and excellent resistance to erosion. They are commonly used in oil devices to protect the contact from oxidation.
Tungsten Carbide Copper Alloy
Tungsten Carbide Copper is one of numerous metal alloys sold by American Elements under the tradename AE Alloys?. Generally immediately available in most volumes, AE Alloys? are available as bar, Ingot, ribbon, wire, shot, sheet, and foil. Ultra high purity and high purity forms also include metal powder, submicron powder and nanoscale, targets for thin film deposition, and pellets for chemical vapor deposition (CVD) and physical vapor deposition (PVD) applications.American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia)and follows applicable ASTM testing standards.Typical and custom packaging is available. Primary applications include bearing assembly, ballast, casting, step soldering, and radiation shielding.
Tungsten Copper Sheet
Chinatungst Online copper tungsten sheet is a composite of tungsten and copper. The coefficient of thermal expansion (CTE) of the composite can be designed by controlling the content of tungsten, matching that of the materials, such as Ceramics (Al2O3, BeO), Semiconductors (Si), Metals (Kovar), etc. The products are widely application in the fields such as radio frequency, microwave, high power diode packaging and optical communication system.
It owns not only the low expansion of tungsten and high heat conductivity of copper. Its expansion index and heat conductivity can also be changed through changing the content of the materials, which provides convenience to the using of the material. We can supply various specifications and the Copper tungsten sheet with different tungsten proportions.
2012年10月31日星期三
Tungsten Carbide Copper Rod
Copper tungsten alloys are commonly used in EDM electrodes and other electrical and electrical/thermal applications. They are also used for facing and inserts for flash and butt welding dies, projection welding electrodes, seam welding bearing inserts and facing for electro-forming and electro-forging dies.
Although they are somewhat more difficult to machine, tungsten carbide copper materials provide high mechanical properties and excellent resistance to erosion. They are commonly used in oil devices to protect the contact from oxidation.
Tungsten Carbide Copper Alloy
Tungsten Carbide Copper is one of numerous metal alloys sold by American Elements under the tradename AE Alloys™. Generally immediately available in most volumes, AE Alloys™ are available as bar, Ingot, ribbon, wire, shot, sheet, and foil. Ultra high purity and high purity forms also include metal powder, submicron powder and nanoscale, targets for thin film deposition, and pellets for chemical vapor deposition (CVD) and physical vapor deposition (PVD) applications.American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia)and follows applicable ASTM testing standards.Typical and custom packaging is available. Primary applications include bearing assembly, ballast, casting, step soldering, and radiation shielding.
2012年10月29日星期一
Copper Tungsten Electrode
Copper tungsten electrode's symbol is WCu. It has good physical and mechanical properties, such as high thermal and electrical conductivity. As to its supply state, copper tungsten electrode can be offered in sintering, tuming, grinding and finishing.
The technique of copper tungsten electrode is copper infiltered tungsten block in vacuum high temperature stove. During processing, proportion of copper and tungsten can be 60W/Cu, 70W/Cu, 75W/Cu, 80W/Cu, 85W/Cu, and 90W/Cu.
Copper tungsten electrode is widely used in sealed cap for transistors sealing welder, contactor materials for high-voltage switches, electrodes for spark processing, circuit breakers, and etc.
Tungsten Copper Sheet
Copper Tungsten sheet IntroduceTungsten Copper Alloy (Copper Tungsten, CuW, or WCu) is a pseudo-alloy of copper and tungsten. As copper and tungsten are not mutually soluble, the material is composed of distinct particles of one metal dispersed in a matrix of the other one. The microstructure is therefore rather a metal matrix composite than a true alloy.
The alloy combines the properties of both metals, resulting in a material that is heat-resistant, ablation-resistant, highly thermally and electrically conductive, and easy to machine. Parts are made from the WCu alloy by pressing the tungsten particles into a desired shape, sintering the compacted part, then infiltrating with molten copper. Sheets, rods and bars of the alloy are available as well.
Tungsten copper alloy sheet Advantages* High arc and temperature resistance
* Good electrical conductivity combined with high thermal conductivity
* Low thermal expansion
The alloy combines the properties of both metals, resulting in a material that is heat-resistant, ablation-resistant, highly thermally and electrically conductive, and easy to machine. Parts are made from the WCu alloy by pressing the tungsten particles into a desired shape, sintering the compacted part, then infiltrating with molten copper. Sheets, rods and bars of the alloy are available as well.
Tungsten copper alloy sheet Advantages* High arc and temperature resistance
* Good electrical conductivity combined with high thermal conductivity
* Low thermal expansion
2012年10月25日星期四
What is Tungsten Copper Alloy Bar
Tungsten copper alloy bar is integrates the advantages of tungsten and copper, within which tungsten’s melting point is higher( about 3410 ℃) and density is larger (about 19.34g/cm3). Tungsten copper alloy is easy to be machined, and is widely used in spaceflight, aviation, electron, electronic power, metallurgy, mechanism etc.
Tungsten copper alloy has different objects, such as rod, flat, bar, square, circle, ring, pipe, tube, bush and so on. And tungsten copper alloy bar is a kind of tungsten copper alloy, whose shape is bar, its transverse surface could be polygon, round or any other shape that you want. Chinatungsten supply tungsten copper alloy bar of high physical and mechanical properties, and we cut it to customers' desired lengths in diameters between 50.8mm to 19050mm. In addition, we set from Dia.1mm to Dia. 60mm, length 200mm tungsten copper alloy bar as standard. What’s more, Chinatungsten offer three different surface processes or finishes according to your demand: black, cleaned and ground.
Tungsten Copper Alloy Bar, the advantages of:
High conductivity, high temperature sintering, and melting refined copper are from the process of composite materials. In addition, there are arc off a good performance, good thermal conductivity, thermal expansion of small, high-temperature non-softening, high-intensity, high-density, high hardness and so on.
Tungsten copper alloy has different objects, such as rod, flat, bar, square, circle, ring, pipe, tube, bush and so on. And tungsten copper alloy bar is a kind of tungsten copper alloy, whose shape is bar, its transverse surface could be polygon, round or any other shape that you want. Chinatungsten supply tungsten copper alloy bar of high physical and mechanical properties, and we cut it to customers' desired lengths in diameters between 50.8mm to 19050mm. In addition, we set from Dia.1mm to Dia. 60mm, length 200mm tungsten copper alloy bar as standard. What’s more, Chinatungsten offer three different surface processes or finishes according to your demand: black, cleaned and ground.
Tungsten Copper Alloy Bar, the advantages of:
High conductivity, high temperature sintering, and melting refined copper are from the process of composite materials. In addition, there are arc off a good performance, good thermal conductivity, thermal expansion of small, high-temperature non-softening, high-intensity, high-density, high hardness and so on.
2012年10月24日星期三
Copper Tungsten Bar Application
Copper tungsten bar is widely used to make Grid siderod, Lead, Support, and Electrode for the Gas discharge lamp, because of the high electrical conductivity and low consumption.
1. Resistance welding electrode
Copper tungsten bar integrates such features of tungsten and copper as high temperature resistance, electrical arc ablation resistance, high proportion, good electrical and heat conductivity, being easy to cut and transpiration cooling. It also owns such advantages of tungsten as high hardness, melting point and adherence resistance. It is often used for projection welding and butt-welding electrode with wear and high temperature resistance.
2. Electric spark electrode
Copper tungsten bar is used for the electrode of mould made from tungsten steel and high-temperature and ultra hard alloy. The common electrode has high consumption and low rate. The high electrical ablation rate, low consumption ratio, precise electrode size and quality processing performance of Copper tungsten can ensure that the precision of the work piece is greatly enhanced.
3. High-voltage discharge tube electrode
When the high-voltage vacuum discharge tube is working, the temperature of contact material will rise to thousands degree centigrade within several tenths seconds. High ablation resistance, high toughness, good electrical and heat conductivity of Copper tungsten provide necessary conditions to stable operation of the discharge tube.
4. Electrical seal material
Copper tungsten bar owns not only the low expansion of tungsten and high heat conductivity of copper. Its expansion index and heat conductivity can also be changed through changing the content of the materials, which provides convenience to the using of the material. We can supply various specifications and the Copper tungsten alloys with different tungsten proportions.
1. Resistance welding electrode
Copper tungsten bar integrates such features of tungsten and copper as high temperature resistance, electrical arc ablation resistance, high proportion, good electrical and heat conductivity, being easy to cut and transpiration cooling. It also owns such advantages of tungsten as high hardness, melting point and adherence resistance. It is often used for projection welding and butt-welding electrode with wear and high temperature resistance.
2. Electric spark electrode
Copper tungsten bar is used for the electrode of mould made from tungsten steel and high-temperature and ultra hard alloy. The common electrode has high consumption and low rate. The high electrical ablation rate, low consumption ratio, precise electrode size and quality processing performance of Copper tungsten can ensure that the precision of the work piece is greatly enhanced.
3. High-voltage discharge tube electrode
When the high-voltage vacuum discharge tube is working, the temperature of contact material will rise to thousands degree centigrade within several tenths seconds. High ablation resistance, high toughness, good electrical and heat conductivity of Copper tungsten provide necessary conditions to stable operation of the discharge tube.
4. Electrical seal material
Copper tungsten bar owns not only the low expansion of tungsten and high heat conductivity of copper. Its expansion index and heat conductivity can also be changed through changing the content of the materials, which provides convenience to the using of the material. We can supply various specifications and the Copper tungsten alloys with different tungsten proportions.
Copper Tungsten Bar Description
Copper tungsten bar is the composite of tungsten and copper, which own the excellent performances of tungsten and copper, such as heat-resistant, ablate-resistant, high-intensity, excellent thermal and electrical conductivity. It is easy to be machined. It is used widely in such industries as engine, electrical power, electron, metallurgy, spaceflight and aviation. Using CIP formation, sintered tungsten skeleton and infiltrating copper (silver) technology, large size and special shape products of tungsten-copper (silver) composites with 6-90 percent of copper are produced, such as electric contacts, electrode, refractory parts, heat sinks and parts of rocket, We can also produce sheet material, tubing, plate and other small products by mould pressing, extrusion pressing and MIM.
2012年10月22日星期一
Tungsten Copper Block
Tungsten copper is a copper and tungsten alloy that is used to conduct heat and electricity. Tungsten copper consists of 10 to 50 percent of its weight in copper and the remaining portion is made out of tungsten. The lower the copper content, the higher its density and hardness is.
About Tungsten Copper Block
Tungsten copper block is an alloy that is made by pressing tungsten or tungsten carbide, sintering the pressed tungsten at a high temperature, and then infiltrating it with copper. Sintering is a metallurgic process by which a metallic powder is made into a coherent mass by heating without melting. The physical properties of both tungsten and copper make them not mutually soluble, meaning that one cannot be combined with the other, similar to the way oil and water will not mix. The alloy is made by dispersing the particles of one metal into a matrix or crystallized pattern of another. This makes tungsten copper's "micro-structure" or molecular shape that of a metal matrix composite and not of a true alloy.
About Tungsten Copper Block
Tungsten copper block is an alloy that is made by pressing tungsten or tungsten carbide, sintering the pressed tungsten at a high temperature, and then infiltrating it with copper. Sintering is a metallurgic process by which a metallic powder is made into a coherent mass by heating without melting. The physical properties of both tungsten and copper make them not mutually soluble, meaning that one cannot be combined with the other, similar to the way oil and water will not mix. The alloy is made by dispersing the particles of one metal into a matrix or crystallized pattern of another. This makes tungsten copper's "micro-structure" or molecular shape that of a metal matrix composite and not of a true alloy.
Tungsten Copper Rod
Features: W-Cu is the use of high purity tungsten powder characteristics and excellent high-purity copper powder metal plasticity, high electrical conductivity, etc., by isostatic pressing, high temperature sintering, melting refined copper infiltration process of composite materials. Breaking arc performance, good thermal conductivity, small thermal expansion, the high temperature softening, high strength, high density, high hardness.
Uses:
1. Resistance welding electrode: a combination of the advantages of tungsten and copper, high temperature resistance, arc erosion, high strength, heavy, electrical conductivity, thermal conductivity, and easy machining, and other characteristics with the sweat of cooling, as with the tungsten high hardness, high melting point, anti-adhesion characteristics, is often used to do a certain wear resistance, high temperature welding, welding electrodes.
2. EDM Electrode: tungsten steel for high temperature super-hard alloy die to be produced by electrical erosion, the common electrode wear big, slow, and the tungsten and copper corrosion, high speed, low loss rate, the exact electrode shape, excellent processing performance, to ensure the accuracy of parts to be machined greatly increased.
3. High-voltage discharge electrode: high-voltage vacuum discharge tube at work, contact material will be a few seconds of time in the zero temperature thousands of degrees Celsius, while the anti-ablation properties of tungsten and copper, high toughness, good electrical conductivity, thermal conductivity performance to the discharge tube to provide the necessary stability conditions.
4. Electronic Packaging Materials: Tungsten, low expansion characteristics of both, but also has high thermal conductivity properties of copper, the thermal expansion coefficient and thermal conductivity of conductive material can be adjusted to change the composition and, thus provides a convenient use of materials.
Chemical composition:
The main chemical composition%: W W70.00 copper Cu30.00
Applications: welding electrodes, EDM electrodes, high voltage discharge electrodes, electronic packaging materials.
Physical and mechanical properties:
Density g/cm3 :13.8-14 conductivity% IACS: 42 Hardness: 185HV bending strength Mpa: 700 softening temperature ℃: 900
Uses:
1. Resistance welding electrode: a combination of the advantages of tungsten and copper, high temperature resistance, arc erosion, high strength, heavy, electrical conductivity, thermal conductivity, and easy machining, and other characteristics with the sweat of cooling, as with the tungsten high hardness, high melting point, anti-adhesion characteristics, is often used to do a certain wear resistance, high temperature welding, welding electrodes.
2. EDM Electrode: tungsten steel for high temperature super-hard alloy die to be produced by electrical erosion, the common electrode wear big, slow, and the tungsten and copper corrosion, high speed, low loss rate, the exact electrode shape, excellent processing performance, to ensure the accuracy of parts to be machined greatly increased.
3. High-voltage discharge electrode: high-voltage vacuum discharge tube at work, contact material will be a few seconds of time in the zero temperature thousands of degrees Celsius, while the anti-ablation properties of tungsten and copper, high toughness, good electrical conductivity, thermal conductivity performance to the discharge tube to provide the necessary stability conditions.
4. Electronic Packaging Materials: Tungsten, low expansion characteristics of both, but also has high thermal conductivity properties of copper, the thermal expansion coefficient and thermal conductivity of conductive material can be adjusted to change the composition and, thus provides a convenient use of materials.
Chemical composition:
The main chemical composition%: W W70.00 copper Cu30.00
Applications: welding electrodes, EDM electrodes, high voltage discharge electrodes, electronic packaging materials.
Physical and mechanical properties:
Density g/cm3 :13.8-14 conductivity% IACS: 42 Hardness: 185HV bending strength Mpa: 700 softening temperature ℃: 900
2012年10月19日星期五
Tungsten Copper Alloy Products
If you are looking to make a robust and lifelong welding using tungsten copper you do not need to worry anymore. We use the best tungsten copper which is much stronger due to it being composed of an even sturdier alloy.
This sintered tungsten copper alloy may be used in heavy spot and projection welding projects. Our tungsten copper is manufactured metallurgically and contains 50-80% tungsten. The structure is smooth, very hard and has high elasticity. The most important reasons for Brouwer Metaal to work with tungsten copper is its unrivalled versatility. We use tungsten copper in our products, because it has a very high melting point and this results in a very stable and safe product. Additionally, tungsten copper is a very good conductor this allows it to be used in electrodes that you use in resistance welding.
The products designed by us, Chinatungsten Online, are guaranteed to have been tested thoroughly in relation to all international guidelines. This ensures a high quality product allows you to do your resistance welding with the greatest precision. The construction of this alloy permits a degree of reliability and makes sure that as customer you do not need to hesitate anymore whether the welding will break or not.
For more information on how to obtain this product you can contact us by email: sales@chinatungsten.com or by telephone:86 592 5129696, we are at your service all the time.
2012年10月17日星期三
Copper Tungsten Tips
Qualitative range of copper tungsten contact rivets that we offer is widely appreciated by our various clients and is available in various specifications. We manufacture these Rivets using high quality of raw material which is soured from our reliable vendors throughout the world. We do complete quality and performance measure inspection of these Rivets at various level of manufacturing unit in order to gain high performance, stable contact resistance durability and good current & thermal conduction, less & even electrolytic corrosion.
In order to fulfill the demand of various electrical and automobile industries, we offer supreme quality of copper tungsten contact rivets that are designed for thermostat, motor breaker, wall switch, IC lead frame and other related applications. These are available in different specifications with respect to capacity and power. We supply these contact rivets to various parts of the country at reasonable price.
Copper Tungsten Beads
2012年10月15日星期一
Copper Tungsten Electrode
What's electrodes?
An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit. The word was coined by the scientist Michael Faraday from the Greek words electron and hoods, a way.
Copper tungsten is a good use of high-purity tungsten metal powder and high purity characteristics of the plasticity of copper powder, the advantages of high conductivity, the static pressure molding, high temperature sintering, melting refined copper from the process of composite materials. Arc off a good performance, good thermal conductivity, thermal expansion of small, high-temperature non-softening, high-intensity, high-density, high hardness.
Resistance welding electrode
A combination of the advantages of tungsten and copper, high temperature resistance, electric arc ablation, high intensity, than the major, conductive, thermal conductivity, and ease of machining, and it has features such as cold sweating, as with tungsten high hardness, high melting point, anti-adhesion characteristics, often used to do a certain resistance to abrasion, resistant to high temperature welding, butt welding electrode.
EDM electrode
In view of tungsten steel, high temperature super-hard alloy die to be produced by corrosion, the common electrode wear big, slow, and the copper tungsten electrical corrosion of high speed, low loss rate, precise electrode shape, excellent processing performance, to ensure the accuracy of processing pieces of greatly increased.
High-voltage electrode discharge tube
High-voltage vacuum discharge tube in the workplace, the contact material in a few seconds of time zero temperatures thousands of degrees celsius, while the copper tungsten anti-ablation properties, high toughness, good electrical conductivity, thermal conductivity performance to the discharge tube to provide the necessary stability conditions.
Electronic packaging materials
Both the low-expansion properties of tungsten, but also has high thermal conductivity properties of copper, its thermal expansion coefficient and thermal conductivity of conductive material can be adjusted to change the composition and thereby to the material provided to facilitate the use.
An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit. The word was coined by the scientist Michael Faraday from the Greek words electron and hoods, a way.
Copper tungsten is a good use of high-purity tungsten metal powder and high purity characteristics of the plasticity of copper powder, the advantages of high conductivity, the static pressure molding, high temperature sintering, melting refined copper from the process of composite materials. Arc off a good performance, good thermal conductivity, thermal expansion of small, high-temperature non-softening, high-intensity, high-density, high hardness.
Resistance welding electrode
A combination of the advantages of tungsten and copper, high temperature resistance, electric arc ablation, high intensity, than the major, conductive, thermal conductivity, and ease of machining, and it has features such as cold sweating, as with tungsten high hardness, high melting point, anti-adhesion characteristics, often used to do a certain resistance to abrasion, resistant to high temperature welding, butt welding electrode.
EDM electrode
In view of tungsten steel, high temperature super-hard alloy die to be produced by corrosion, the common electrode wear big, slow, and the copper tungsten electrical corrosion of high speed, low loss rate, precise electrode shape, excellent processing performance, to ensure the accuracy of processing pieces of greatly increased.
High-voltage electrode discharge tube
High-voltage vacuum discharge tube in the workplace, the contact material in a few seconds of time zero temperatures thousands of degrees celsius, while the copper tungsten anti-ablation properties, high toughness, good electrical conductivity, thermal conductivity performance to the discharge tube to provide the necessary stability conditions.
Electronic packaging materials
Both the low-expansion properties of tungsten, but also has high thermal conductivity properties of copper, its thermal expansion coefficient and thermal conductivity of conductive material can be adjusted to change the composition and thereby to the material provided to facilitate the use.
2012年10月14日星期日
Tungsten Copper Alloy Components Properties
Tungsten Copper Alloy Components Physical Properties
Tungsten copper alloy is a metal with a distinct reddish or orange tint, with a metallic luster. The cubic crystalline structure is face-centered, and reflects only red and orange colored light from the visible spectrum, giving it the familiar reddish hue. Compared to adjacent metals in the periodic table, copper is harder than zinc but softer than iron. The metal is malleable, meaning that it can be elongated with pressure and molded into different shapes. Copper is also ductile, which enables it to change form and be stretched into long thin structures without breaking. Tungsten copper alloy components properties, along with its ability to conduct electricity extremely well, make copper suitable for use in electrical cable manufacturing, where these physical attributes are particularly desirable.
Tungsten Copper Alloy Components Chemical Properties
The atomic number of copper used in wires is 29, meaning it has 29 protons. Copper's symbol is "Cu," and its atomic weight is 63.54. Copper is placed in column 1B in the periodic table, along with silver and gold, whose symbols are "Ag" and "Au," respectively.Tungsten copper alloy components have a Moh's hardness (a system of measurement to evaluate the hardness of metals) of between 2.5 and 3. Tungsten copper alloy components used in manufacturing wires has a very high specific gravity of 8.2, which is much higher than other substances of industrial interest, such as water (1.0), carbon (2.2) and sulfur (2.1). The specific densities of silver and gold are both higher than copper, at 10.5 and 19, respectively. Copper wires have low chemical reactivity; in reaction with other elements, laboratory copper has a charge of +1, known as cuprous or +2, known as cupric.
Tungsten copper alloy is a metal with a distinct reddish or orange tint, with a metallic luster. The cubic crystalline structure is face-centered, and reflects only red and orange colored light from the visible spectrum, giving it the familiar reddish hue. Compared to adjacent metals in the periodic table, copper is harder than zinc but softer than iron. The metal is malleable, meaning that it can be elongated with pressure and molded into different shapes. Copper is also ductile, which enables it to change form and be stretched into long thin structures without breaking. Tungsten copper alloy components properties, along with its ability to conduct electricity extremely well, make copper suitable for use in electrical cable manufacturing, where these physical attributes are particularly desirable.
Tungsten Copper Alloy Components Chemical Properties
The atomic number of copper used in wires is 29, meaning it has 29 protons. Copper's symbol is "Cu," and its atomic weight is 63.54. Copper is placed in column 1B in the periodic table, along with silver and gold, whose symbols are "Ag" and "Au," respectively.Tungsten copper alloy components have a Moh's hardness (a system of measurement to evaluate the hardness of metals) of between 2.5 and 3. Tungsten copper alloy components used in manufacturing wires has a very high specific gravity of 8.2, which is much higher than other substances of industrial interest, such as water (1.0), carbon (2.2) and sulfur (2.1). The specific densities of silver and gold are both higher than copper, at 10.5 and 19, respectively. Copper wires have low chemical reactivity; in reaction with other elements, laboratory copper has a charge of +1, known as cuprous or +2, known as cupric.
2012年10月11日星期四
Tungsten Copper Plate
Introduction
All of our tungsten copper products are produced by sinter, and infiltrate process with high purity tungsten powder and oxygen-free copper. With accurate percentage composition of tungsten and copper,well-proportioned organization and high precision machining are the tungsten copper plates from Luoyang Achemetal Co., Ltd superior in quality.
The advantages of the tungsten copper plates:
High thermostability
High arc resistance
High strength
High electrical conductivity and thermal conductivity
Heat sink character
Application
Our tungsten copper plates are widely used in many industrial areas such as aerospace, power, electronic, metallurgy, mechanical to make:
Cooling device in electronic equipment
Electrodes in Resistance welding machine
Arcing contacts and vaccum contacts in high and medium voltage breakers or vaccum interruptors
Heat sinks as passive cooling elements of electronic devices and Electronic packaging materials.
The components of the pushing device in spacecrafts
Chemical composition and physical mechanical properties
The tungsten copper plates from Luoyang Achemetal co., Ltdcomply with china standard GH 8320-87
All of our tungsten copper products are produced by sinter, and infiltrate process with high purity tungsten powder and oxygen-free copper. With accurate percentage composition of tungsten and copper,well-proportioned organization and high precision machining are the tungsten copper plates from Luoyang Achemetal Co., Ltd superior in quality.
The advantages of the tungsten copper plates:
High thermostability
High arc resistance
High strength
High electrical conductivity and thermal conductivity
Heat sink character
Application
Our tungsten copper plates are widely used in many industrial areas such as aerospace, power, electronic, metallurgy, mechanical to make:
Cooling device in electronic equipment
Electrodes in Resistance welding machine
Arcing contacts and vaccum contacts in high and medium voltage breakers or vaccum interruptors
Heat sinks as passive cooling elements of electronic devices and Electronic packaging materials.
The components of the pushing device in spacecrafts
Chemical composition and physical mechanical properties
The tungsten copper plates from Luoyang Achemetal co., Ltdcomply with china standard GH 8320-87
2012年10月10日星期三
Copper Tungsten Plate
Our major product of copper tungsten sheet, copper tungsten
plate, block and bar is very popular used as EDM electrode. This material has
both tungsten and copper's character, for example: copper is good for
electrical conductivity, tungsten is good for the hardness. Our copper tungsten
plate for EDM is made by vacuum infiltration technology. Which product has very
good physical and mechanical properties with excellent wear resistance.
Our copper tungsten plate has below advantage:
-Maturity press- sinter- infiltration process.
-high electrical conductivity gets high erosion speed.
Copper Tungsten Typical Properties
|
Material
|
Composition
|
Density
|
Electrical Conductivity
|
Hardness
|
Class
|
RWMA Group B
|
|
WD™10055
|
55W45CU
|
12.3 g/cm3
|
49 % IACS
|
70 HRB
|
10
|
10.74450
|
|
WD™10060
|
60W40CU
|
12.75 g/cm3
|
47 % IACS
|
76 HRB
|
|
|
|
WD™10065
|
65W35CU
|
13.3 g/cm3
|
44 % IACS
|
82 HRB
|
|
|
|
WD™10070
|
70W30CU
|
13.9 g/cm3
|
42 % IACS
|
88 HRB
|
|
|
|
WD™10075
|
75W25CU
|
14.5 g/cm3
|
38 % IACS
|
94 HRB
|
11
|
11.74400
|
|
WD™10080
|
80W20CU
|
15.2 g/cm3
|
34 % IACS
|
98 HRB
|
12
|
12.74350
|
2012年10月9日星期二
Copper Tungsten Alloy
Copper tungsten alloy is the composite of Tungsten and Copper, which own the excellent performances of Tungsten and Copper, such as heat-resistant, ablate-resistant, high-intensity, excellent thermal and electrical conductivity. Tungsten copper alloy is easy to be machined. Tungsten copper alloy is used widely in such industries as engine, electrical power, electron, metallurgy, spaceflight and aviation. Using CIP formation, sintered tungsten skeleton and infiltrating copper technology, large size and special shape products of tungsten copper composites with 6-90 percent of copper are produced, such as electric contacts, electrode, refractory parts, heat sinks and parts of rocket, We can also produce tungsten copper alloy sheet material, tubing, plate and other small products by mould pressing, extrusion pressing and MIM.
Copper Tungsten alloy combines the properties of both metals, resulting in a material that is heat-resistant, ablation-resistant, highly thermally and electrically conductive, and easy to machine.
Parts are made from the tungsten copper alloy by pressing the tungsten particles into a desired shape, sintering the compacted part, and then infiltrating with molten copper. Sheets, rods and bars of tungsten copper alloy are available as well.
Commonly used copper tungsten alloy contains 10 to 50 wt. % of copper, the remaining portion being substantially all tungsten. The typical properties of the alloy depend on its composition. The alloy with less wt.% of copper has higher density, higher hardness and higher resistivity. The typical density of CuW90 alloy, with 10% of copper, is 16.75g/cm3 and 11.85g/cm3 for CuW50 alloy. CuW90 has higher hardness and resistivity of 260 HB kgf/mm2 and 6.5 μΩ.cm than CuW50.
Copper Tungsten alloy combines the properties of both metals, resulting in a material that is heat-resistant, ablation-resistant, highly thermally and electrically conductive, and easy to machine.
Parts are made from the tungsten copper alloy by pressing the tungsten particles into a desired shape, sintering the compacted part, and then infiltrating with molten copper. Sheets, rods and bars of tungsten copper alloy are available as well.
Commonly used copper tungsten alloy contains 10 to 50 wt. % of copper, the remaining portion being substantially all tungsten. The typical properties of the alloy depend on its composition. The alloy with less wt.% of copper has higher density, higher hardness and higher resistivity. The typical density of CuW90 alloy, with 10% of copper, is 16.75g/cm3 and 11.85g/cm3 for CuW50 alloy. CuW90 has higher hardness and resistivity of 260 HB kgf/mm2 and 6.5 μΩ.cm than CuW50.
2012年10月8日星期一
Tungsten Copper Alloy Applications
Tungsten alloy is the composite of Tungsten and Copper which own the excellent performances of Tungsten and Copper, such as heat-resistant, ablate-resistant, high-intensity,high-density, excellent thermal and electrical conductivity. It is easy to be machined. It is used widely in such industries as engine, electric power, electron, metallurgy, spaceflight and avigation.Using CIP formation, sintered tungsten skeleton and infiltrating copper technology, large size and special shape products of tungsten copper are produced, such as electric contacts, electrode, refractory parts, heat sinks and parts of rocket. We can also produce sheet material, tubing, plate and other small products by mould pressing, extrusion pressing and MIM.
1,High performance materials used in spaceflight field
Tungsten Copper alloy has such excellent performances as heat-resistant, ablate-resistant, high - intensity, high-density and self-cooling,so it is widely used in spaceflight field.
2,Electrical Contact materials
Electrical contacts are subjected to extreme mechanical and thermal stresses during operation. For fractions of a second, temperatures rise to several thousand degrees as a result of the arcing. Our tungsten Copper materials are used owing to their unique physical properties.
Advantages: without other element except Tungsten and Copper, uniform material, low content of gas and impurity, very high burn-off resistance, excellent thermal and electrical conductivity, all necessary joining and machining processes.
3,Electrodes for Spark Erosion
Our WCu electrodes are best suitable for EDM machining of those materials.
Advantages: low wear, high contour sharpness, good machinability.
Types of product: rods, tubes and plates.
1,High performance materials used in spaceflight field
Tungsten Copper alloy has such excellent performances as heat-resistant, ablate-resistant, high - intensity, high-density and self-cooling,so it is widely used in spaceflight field.
2,Electrical Contact materials
Electrical contacts are subjected to extreme mechanical and thermal stresses during operation. For fractions of a second, temperatures rise to several thousand degrees as a result of the arcing. Our tungsten Copper materials are used owing to their unique physical properties.
Advantages: without other element except Tungsten and Copper, uniform material, low content of gas and impurity, very high burn-off resistance, excellent thermal and electrical conductivity, all necessary joining and machining processes.
3,Electrodes for Spark Erosion
Our WCu electrodes are best suitable for EDM machining of those materials.
Advantages: low wear, high contour sharpness, good machinability.
Types of product: rods, tubes and plates.
Tungsten Copper Ring
Tungsten copper ring have high physical and mechanical
properties, as well as high thermal and electrical conductivity, these
prosperities make our materials very suitable for the die inserts and electrode
facing.
Our copper tungsten alloys are designated as ASTMB702, RWMA
Class 10, RWMA Class 11, RWMA Class 12, and GB/T8320-2003.
Typical properties:
|
Material
|
Composition
|
Density
|
Electrical Conductivity
|
Hardness
|
Class
|
|
CuW55
|
55W:45Cu
|
12.3 g/cm3
|
49% IACS
|
76 HRB
|
10
|
|
CuW60
|
60W:40Cu
|
12.75 g/cm3
|
47% IACS
|
82HRB
|
|
|
CuW65
|
65W:35Cu
|
13.3 g/cm3
|
44% IACS
|
88HRB
|
|
|
CuW70
|
70W:30Cu
|
13.8 g/cm3
|
42% IACS
|
94HRB
|
11
|
|
CuW75
|
75W:25Cu
|
14.5 g/cm3
|
38% IACS
|
98HRB
|
12
|
|
CuW80
|
80W:20Cu
|
15.15 g/cm3
|
34% IACS
|
109HRB
|
|
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