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.
Tungsten copper heat sink 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.
Advantages: High thermal conductivity, Excellent hermetic, Excellent size control, surface finish and flatness, Semi-finished or finished (Ni/Au plated) products available properties of WCu and MoCu heat materials
2012年9月27日星期四
Copper Tungsten Electrode
What's electrodes?
An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte or a vacuum). The word was coined by the scientist Michael Faraday from the Greek words electron (meaning amber, from which the word electricity is derived) 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 (e.g. a semiconductor, an electrolyte or a vacuum). The word was coined by the scientist Michael Faraday from the Greek words electron (meaning amber, from which the word electricity is derived) 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9月26日星期三
Tungsten Copper 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. Only Tungsten Copper materials will stand these high temperature & aberration.
Tungsten Copper material has good resistance to arc erosion, mechanical wear, contact welding and good conductivity. They are usually selected for oil, gas, air or vacuum, devices. The contact surfaces will oxidize when switched in air. These press-sinter-infiltrate materials should only be considered for arcing surfaces in air when used as arcing tips, arc plates and arc runners. When switching with moderate contact arcing, the Tungsten Copper with a high copper content may give the lowest erosion. As arcing severity increases, the Tungsten Copper with the higher refractory content withstand arc erosion better. Tungsten Coppers are also used as arcing edges of selector switchblades in transformer tap changers.
Tungsten Copper material has good resistance to arc erosion, mechanical wear, contact welding and good conductivity. They are usually selected for oil, gas, air or vacuum, devices. The contact surfaces will oxidize when switched in air. These press-sinter-infiltrate materials should only be considered for arcing surfaces in air when used as arcing tips, arc plates and arc runners. When switching with moderate contact arcing, the Tungsten Copper with a high copper content may give the lowest erosion. As arcing severity increases, the Tungsten Copper with the higher refractory content withstand arc erosion better. Tungsten Coppers are also used as arcing edges of selector switchblades in transformer tap changers.
Tungsten Copper Fabrication & Machining
Diamond Ground Products is an expert in the field of fabricating and machining tungsten-copper. With their state-of-the-art equipment and experienced staff, DGP offers unmatched quality and capability at the lowest prices. DGP provides precise and consistent parts from low volume prototype to high-volume production and from the simplest rods to complex fabrications with the strictest tolerances.
Tungsten-Copper is a high-performance material for the manufacture of parts, and is characterized by:
•High thermal conductivity
•Low thermal expansion
•High wear resistance
•Excellent electrical conductivity
Common Tungsten Copper Applications include:
•Resistance welding
•Heat sinks
•Electrical discharge machining
•Electro-chemical machining
•Electrical contacts
Tungsten-Copper is a high-performance material for the manufacture of parts, and is characterized by:
•High thermal conductivity
•Low thermal expansion
•High wear resistance
•Excellent electrical conductivity
Common Tungsten Copper Applications include:
•Resistance welding
•Heat sinks
•Electrical discharge machining
•Electro-chemical machining
•Electrical contacts
2012年9月24日星期一
Tungsten Copper Bar
What is tungsten copper bar?
Tungsten copper bar 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.
Applications For Tungsten Copper Bar
Because of the high eletrical conductivity and low consumption, tungsten copper bars are widely used to make Grid siderod, Lead, Support, Electrode for the Gas discharge lamp.
Tungsten copper bar 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.
Applications For Tungsten Copper Bar
Because of the high eletrical conductivity and low consumption, tungsten copper bars are widely used to make Grid siderod, Lead, Support, Electrode for the Gas discharge lamp.
Tungsten Copper Parts
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 parts from Luoyang Achemetal Co., Ltd superior in quality.
The advantages of the tungsten copper parts:
High thermostability
High arc resistance
High strength
High electrical conductivity and thermal conductivity
Heat sink character
Our tungsten copper parts 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
The advantages of the tungsten copper parts:
High thermostability
High arc resistance
High strength
High electrical conductivity and thermal conductivity
Heat sink character
Our tungsten copper parts 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
2012年9月21日星期五
Copper Tungsten Contacts Material
MODISON offers high erosion resistant Copper Tungsten material produced by Powder Metallurgy wherein sintered skeleton of Tungsten is impregnated with Copper. The erosion pattern of this material is far superior to materials produced by other production techniques. This material maintains quite regular shape under extreme arcing conditions and has only uniform roughening effect without cracks and burn-off droplets.
The Tungsten skeleton is protected by impregnated Copper as it provides evaporative cooling effect in extreme arcing conditions, thereby protecting and limiting the temperature rise of the skeleton and preventing disintegration. The grain size of Tungsten powder has considerable influence on arc erosion behaviour of Copper Tungsten Contact Materials. Grain size of Tungsten is optimized to meet customer’s product needs in order to have low uniform erosion rates and burn-out patterns. All contact materials are produced by impregnation liquid phase sintering (wet sintering of presintered skeleton). Although laboratory tests indicate that minimum erosion occurs when the Tungsten grain size is between 2 and 8 μm, materials made of other grain sizes have also given superior performance in practice. The tungsten content in the composite does influence contact performance. Materials with particularly high Tungsten content consisting of fine powders, quickly develop cracks on the surface when subjected to repeated thermal and mechanical shocks. This can lead to parts of Tungsten skeleton’s disintegration and impairing the function of the Circuit Breaker.
On the other hand materials which have a slightly higher Copper content (25~30%Cu) show a regular erosion pattern with only a slight roughening of the surfaces.
The final chemical composition can only be maintained within certain limits due to impregnation method of sintering. Accordingly instead of fixed data, it is only possible to give production dependent ranges for the mechanical and electrical characteristics although this does not affect the most important functional characteristics –its erosion behaviour to any significant degree.
The Tungsten skeleton is protected by impregnated Copper as it provides evaporative cooling effect in extreme arcing conditions, thereby protecting and limiting the temperature rise of the skeleton and preventing disintegration. The grain size of Tungsten powder has considerable influence on arc erosion behaviour of Copper Tungsten Contact Materials. Grain size of Tungsten is optimized to meet customer’s product needs in order to have low uniform erosion rates and burn-out patterns. All contact materials are produced by impregnation liquid phase sintering (wet sintering of presintered skeleton). Although laboratory tests indicate that minimum erosion occurs when the Tungsten grain size is between 2 and 8 μm, materials made of other grain sizes have also given superior performance in practice. The tungsten content in the composite does influence contact performance. Materials with particularly high Tungsten content consisting of fine powders, quickly develop cracks on the surface when subjected to repeated thermal and mechanical shocks. This can lead to parts of Tungsten skeleton’s disintegration and impairing the function of the Circuit Breaker.
On the other hand materials which have a slightly higher Copper content (25~30%Cu) show a regular erosion pattern with only a slight roughening of the surfaces.
The final chemical composition can only be maintained within certain limits due to impregnation method of sintering. Accordingly instead of fixed data, it is only possible to give production dependent ranges for the mechanical and electrical characteristics although this does not affect the most important functional characteristics –its erosion behaviour to any significant degree.
2012年9月19日星期三
Copper Tungsten Contacts
Chinatungsten Online offers total solutions for complete range of contact Parts both for Arcing and Main Current Carrying Contacts; for Medium and High Tension switchgear. Right from silver Refining to producing all the semis like oxygen free copper, CuCr/CuCrZr, Ag alloys, extruded Sections and Profiles are carried out in-house. In addition having state-of-the-art Electron Beam Welding machines, VIM Furnaces, CNC Machining Centers and Ag plating plant all under one roof is an added competitive edge.
Contact Materials and Contact Parts are manufactured in a wide variety of Contact and Carrier Material combinations as per customer’s specifications.
Quality of the products and production processes is strictly monitored to ensure conformance to specifications. The quality Assurance Systems ensures complete traceability of all product batches within the framework of ISO 9001 : 2000 standards.
Contact Materials and Contact Parts are manufactured in a wide variety of Contact and Carrier Material combinations as per customer’s specifications.
Quality of the products and production processes is strictly monitored to ensure conformance to specifications. The quality Assurance Systems ensures complete traceability of all product batches within the framework of ISO 9001 : 2000 standards.
2012年9月18日星期二
Tungsten Copper Heat Sinks
Tungsten Copper Heat Sinks
Introduce(detail):
Tungsten copper sheets have very high in plane conductivity provide by layers of copper and low thermal expansion provided by the inner layer of molybdenum. These laminated sheets have the ability to spread the heat from a concentrated heat source and then dissipate the heat through the layers. They Also:
Offer an economical solution to many applications
Will not delaminate and can resist repeated 850' C cycles
Available in several standard ratios and many thicknesses for tailored TE machining
Are lower weight than WCu composite materials
Are available in larger and thinner sheet size
Utilize copper that is easily plated
Can be machined by EDM
WCu composites are made by infiltrating, under vacuum, uniform controlled porous blocks of tungsten with molten co pper. This results in a material with an interconnected copper matrix that has high thermal conductivity in all axis, low thermal expansion, and good electrical conductivity, Copper content can range between 10% and 25%.
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.
Introduce(detail):
Tungsten copper sheets have very high in plane conductivity provide by layers of copper and low thermal expansion provided by the inner layer of molybdenum. These laminated sheets have the ability to spread the heat from a concentrated heat source and then dissipate the heat through the layers. They Also:
Offer an economical solution to many applications
Will not delaminate and can resist repeated 850' C cycles
Available in several standard ratios and many thicknesses for tailored TE machining
Are lower weight than WCu composite materials
Are available in larger and thinner sheet size
Utilize copper that is easily plated
Can be machined by EDM
WCu composites are made by infiltrating, under vacuum, uniform controlled porous blocks of tungsten with molten co pper. This results in a material with an interconnected copper matrix that has high thermal conductivity in all axis, low thermal expansion, and good electrical conductivity, Copper content can range between 10% and 25%.
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.
Tungsten Copper Heat Sink's properties
Copper Tungsten is one of the most popular refractory metal based heat sink materials offered today. With the new off-the-shelf system, we are able to offer standard products with a short lead-time at extremely competitive rates. Traditional CPU heat sink designs usually feature a metal heat sink and a fan working in concert to siphon off the heat generated by computer parts. However, that design creates a 'boundary layer' of air, retaining the heat that the fan is supposed to disperse. The power necessary to drive the fan, as well as the fan's proximity to the boundary layer, makes that design inefficient. The Sandia Cooler eliminates the fan, replacing it with a finned heat sink that can disperse the boundary layer far more efficiently since the two are in closer contact. Tungsten copper is the best material to make the high performance and best quality Heat Sink.
2012年9月17日星期一
Tungsten Copper Sheet Properties
Tungsten copper sheet 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.
Copper tungsten sheet is a composite of tungsten and copper. The coefficient of thermal expansion of the composite can be designed by controlling the content of tungsten, matching that of the materials, such as Ceramics, Semiconductors, Metals, etc. The products are widely application in the fields such as radio frequency, microwave, high power diode packaging and optical communication system.
2012年9月13日星期四
Tungsten Copper EDM and ECM
Our tungsten copper composites are used worldwide for electrical discharge machining (EDM) and electrochemical machining (ECM) electrodes. All composite material is manufactured by the press, sinter, and infiltrate process; adhering to strict quality checks every step of the way. You can rely on the quality of our tungsten composites to provide consistent, homogeneous materials that yield high and even burning rates
Tungsten copper alloys are used worldwide for EDM (Electrical Discharge Machining) and ECM (Electrochemical Machining) electrodes. All material is manufactured by the press, sinter, and infiltrate process. Virgin tungsten powders are used, resulting in a consistent homogeneous material giving high and even burning rates. Tungsten copper is used in plunger/sinker applications where intricate definition is required, especially in tungsten carbide.
Tungsten copper alloys are used worldwide for EDM (Electrical Discharge Machining) and ECM (Electrochemical Machining) electrodes. All material is manufactured by the press, sinter, and infiltrate process. Virgin tungsten powders are used, resulting in a consistent homogeneous material giving high and even burning rates. Tungsten copper is used in plunger/sinker applications where intricate definition is required, especially in tungsten carbide.
Tungsten Copper Applications
CuW alloys are used where the combination of high heat resistance, high electrical and 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. WCu alloys are also used in electrodes for electrical discharge machining and electrochemical machining.[2]
The CuW75 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. Other materials for this applications are CuMo alloy, AlSiC, and Dymalloy.
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.[3] 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 CuW75 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. Other materials for this applications are CuMo alloy, AlSiC, and Dymalloy.
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.[3] 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.
2012年9月11日星期二
Copper Tungsten Contact
Chinatungsten Online offers high erosion resistant copper tungsten material produced by Powder Metallurgy wherein sintered skeleton of Tungsten is impregnated with Copper. The erosion pattern of this material is far superior to materials produced by other production techniques. This material maintains quite regular shape under extreme arcing conditions and has only uniform roughening effect without cracks and burn-off droplets.
The Tungsten skeleton is protected by impregnated copper as it provides evaporative cooling effect in extreme arcing conditions, thereby protecting and limiting the temperature rise of the skeleton and preventing disintegration. The grain size of tungsten powder has considerable influence on arc erosion behaviour of copper tungsten contact materials. Grain size of Tungsten is optimized to meet customer’s product needs in order to have low uniform erosion rates and burn-out patterns. All contact materials are produced by impregnation liquid phase sintering (wet sintering of presintered skeleton). Although laboratory tests indicate that minimum erosion occurs when the Tungsten grain size is between 2 and 8 µm, materials made of other grain sizes have also given superior performance in practice. The tungsten content in the composite does influence contact performance. Materials with particularly high Tungsten content consisting of fine powders, quickly develop cracks on the surface when subjected to repeated thermal and mechanical shocks. This can lead to parts of Tungsten skeleton’s disintegration and impairing the function of the Circuit Breaker.
The Tungsten skeleton is protected by impregnated copper as it provides evaporative cooling effect in extreme arcing conditions, thereby protecting and limiting the temperature rise of the skeleton and preventing disintegration. The grain size of tungsten powder has considerable influence on arc erosion behaviour of copper tungsten contact materials. Grain size of Tungsten is optimized to meet customer’s product needs in order to have low uniform erosion rates and burn-out patterns. All contact materials are produced by impregnation liquid phase sintering (wet sintering of presintered skeleton). Although laboratory tests indicate that minimum erosion occurs when the Tungsten grain size is between 2 and 8 µm, materials made of other grain sizes have also given superior performance in practice. The tungsten content in the composite does influence contact performance. Materials with particularly high Tungsten content consisting of fine powders, quickly develop cracks on the surface when subjected to repeated thermal and mechanical shocks. This can lead to parts of Tungsten skeleton’s disintegration and impairing the function of the Circuit Breaker.
Tungsten Copper Electron Beam Welding
Generally Modison offers Arcing Contacts where the Copper Tungsten Tip is joined with the carrier by Electron Beam Welding. This process of welding offers the most reliable joint and minimum heat affected zone (softening of the base part) and thereby maintaining joint properties very close to parent metal properties. The small localized heat affected zone is further improved by reshaping and cold working. EB welding is also especially suitable for joining dissimilar carrier materials such as steel to Cu/Cu/Cr.
2012年9月10日星期一
Tungsten Copper Electrical Contact Materials
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. They excel in these applications because they withstand the effects of the arcing incident to the interruptions of large current.
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.
Tungsten has the highest strength & melting temperature of the refractory metals. This is the principal factor determining the contacts resistance to arc erosion & mechanical wear. The strength, erosion & weld characteristics of the contact increase with increasing tungsten content, however the electrical & thermal characteristics decrease with the increasing refractory content.
Mipalloy engineering assistance is available on request. We will analyze your application & recommend sintered materials to suit your requirements. We can often suggest design revisions that may improve the performance of the product & reduce your costs.
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.
Tungsten has the highest strength & melting temperature of the refractory metals. This is the principal factor determining the contacts resistance to arc erosion & mechanical wear. The strength, erosion & weld characteristics of the contact increase with increasing tungsten content, however the electrical & thermal characteristics decrease with the increasing refractory content.
Mipalloy engineering assistance is available on request. We will analyze your application & recommend sintered materials to suit your requirements. We can often suggest design revisions that may improve the performance of the product & reduce your costs.
2012年9月6日星期四
Applications of Tungsten Copper Composites
Resistance Welding
The high physical and mechanical properties, as well as the thermal and electrical conductivity, of refractory metal composites make these materials very suitable for die inserts and electrode facings, flash and butt welding dies, and hot upsetting. They can also solve heat balance problems.
Heat Sinks
Hogen Industries developed CuW75 to be used extensively in thermal mounting plates, chip carriers, flanges, and frames for high-power electronic devices. As a copper tungsten 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 these two materials results in thermal expansion characteristics similar to those of silicone carbide, aluminum oxide, and beryllium oxide, used as chips and substrates. Because of its thermal conductivity and expansion characteristics, it works well in densely packed circuits.
Electrical Contacts
Hogen Industries developed CuW75 materials to be used in oil-filled devices, air and gas circuit breakers, contactors, and high voltage switch gear. Some common applications are
·arcing contacts and plates
·arc runners
·current carrying members
·blade facings
All of our materials are produced by the press, sinter, and infiltrate process. Each manufacturing step, including the basic powder, is closely controlled, monitored, and signed off on by Quality Assurance. After completion, all manufactured lots are checked for conductivity, density, and hardness prior to shipping. This information is recorded and kept on file, and also accompanies the parts or materials when requested.
EDM and ECM
Tungsten copper composites are used worldwide for EDM (Electrical Discharge Machining) and ECM (Electrochemical Machining) electrodes. All material is manufactured by the press, sinter, and infiltrate process. Virgin powders are used, resulting in a consistent homogeneous material giving high and even burning rates. Copper tungsten is used in plunger/sinker applications where intricate definition is required, especially in tungsten carbide.
The high physical and mechanical properties, as well as the thermal and electrical conductivity, of refractory metal composites make these materials very suitable for die inserts and electrode facings, flash and butt welding dies, and hot upsetting. They can also solve heat balance problems.
Heat Sinks
Hogen Industries developed CuW75 to be used extensively in thermal mounting plates, chip carriers, flanges, and frames for high-power electronic devices. As a copper tungsten 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 these two materials results in thermal expansion characteristics similar to those of silicone carbide, aluminum oxide, and beryllium oxide, used as chips and substrates. Because of its thermal conductivity and expansion characteristics, it works well in densely packed circuits.
Electrical Contacts
Hogen Industries developed CuW75 materials to be used in oil-filled devices, air and gas circuit breakers, contactors, and high voltage switch gear. Some common applications are
·arcing contacts and plates
·arc runners
·current carrying members
·blade facings
All of our materials are produced by the press, sinter, and infiltrate process. Each manufacturing step, including the basic powder, is closely controlled, monitored, and signed off on by Quality Assurance. After completion, all manufactured lots are checked for conductivity, density, and hardness prior to shipping. This information is recorded and kept on file, and also accompanies the parts or materials when requested.
EDM and ECM
Tungsten copper composites are used worldwide for EDM (Electrical Discharge Machining) and ECM (Electrochemical Machining) electrodes. All material is manufactured by the press, sinter, and infiltrate process. Virgin powders are used, resulting in a consistent homogeneous material giving high and even burning rates. Copper tungsten is used in plunger/sinker applications where intricate definition is required, especially in tungsten carbide.
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.
2012年9月4日星期二
Tungsten Copper Electrical Contacts
Tungsten copper 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. Only Tungsten Copper materials will stand these high temperature & aberration.
Tungsten Copper electrical contacts have good resistance to arc erosion, mechanical wear, contact welding and good conductivity. They are usually selected for oil, gas, air or vacuum, devices. The contact surfaces will oxidize when switched in air. These press-sinter-infiltrate materials should only be considered for arcing surfaces in air when used as arcing tips, arc plates and arc runners. When switching with moderate contact arcing, the Tungsten Copper with a high copper content may give the lowest erosion. As arcing severity increases, the Tungsten Copper with the higher refractory content withstand arc erosion better. Tungsten Coppers are also used as arcing edges of selector switchblades in transformer tap changers.
The high Electrical & thermal conductivity of Copper are combined with the arc-resistant & no-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.
Tungsten Copper electrical contacts have good resistance to arc erosion, mechanical wear, contact welding and good conductivity. They are usually selected for oil, gas, air or vacuum, devices. The contact surfaces will oxidize when switched in air. These press-sinter-infiltrate materials should only be considered for arcing surfaces in air when used as arcing tips, arc plates and arc runners. When switching with moderate contact arcing, the Tungsten Copper with a high copper content may give the lowest erosion. As arcing severity increases, the Tungsten Copper with the higher refractory content withstand arc erosion better. Tungsten Coppers are also used as arcing edges of selector switchblades in transformer tap changers.
The high Electrical & thermal conductivity of Copper are combined with the arc-resistant & no-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 Thread Tapping Electrode
Copper Tungsten Thread Tapping Electrode
|
Size Specification (unit:
mm)
|
P(pitch)
|
D(outer
diameter)
|
S(Shank length)
|
B(Thread
length)
|
|
WDC0M2.5
|
0.45
|
1.55
|
35
|
15
|
|
WDC0M3
|
0.50
|
2.00
|
25
|
55
|
|
WDC0M4
|
0.70
|
2.80
|
25
|
55
|
|
WDC0M5
|
0.80
|
3.70
|
25
|
55
|
|
WDC0M6
|
1.00
|
4.50
|
25
|
55
|
|
WDC0M8
|
1.25
|
6.30
|
25
|
55-75
|
|
WDC0M10
|
1.50
|
8.00
|
25
|
55-75
|
|
WDC0M12
|
1.75
|
9.70
|
25
|
55-75
|
|
WDC0M14
|
2.00
|
11.50
|
25
|
55-75
|
|
WDC0M16
|
2.00
|
13.50
|
25
|
55-75
|
|
WDC0M18
|
2.50
|
15.00
|
25
|
55-75
|
|
WDC0M20
|
2.50
|
17.00
|
25
|
2012年9月3日星期一
Tungsten Copper Electrode
Tungsten copper 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 W-Cu 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 W-Cu 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.
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