Tungsten Copper Spot Welding Needle

Tungsten copper spot welding needle has many advantages, such as small in volume, excellent electrical and thermal conductivity, high welding stability, good anti-adhesion and no bombing fire, etc., in the micro-battery spot welding field has broad application prospects.

Types

Tungsten Copper Spot Welding Needle Picture

According to the differences of the shapes and structures, tungsten copper spot welding needle can be specifically divided into single head center solder pins, solder pins single eccentric head, double-headed center solder pin, eccentric stud welding spot welding needle, insert needle and so on. Common micro spot welding batteries includes laptop battery, cell phone battery, walkie-talkie battery, difital camera battery, button battery, lithium battery, nickel hydride nikel-cadmium battery, etc., the specific selection should be considered with the structure and the properties of the products.

Notice

1. Before spot welding, it should be ensured that the welding needle and the surface welded at the same level;

2. Before spot welding, it should be checked if the welding needle has been oxided of burned and use sandpaper or a sanding belt to smooth surface until the surface is smooth and no oxides;

3. The same spot welding joints can not be welded twice, and to ensure that the positive and negative electrodes have four effective solder joints;

4. There is no bombing fire and over-burnt phenomenon.

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Tungsten Copper Spot Welding Electrode

Tungsten copper spot welding electrode plays an important role in ensuring the quality of spot welding, which includes conductivity, transfer the pressure and rapidly scatter the heat in the welding area.

Advantages

1. High machining accuracy, the small area of the welding sharp;

2. Low voltage required, high-performance welding and good welding stability;

3. High torsional strength can effectively ensure the quality and precision of processing;

4. Small welding seam, good consistency and not easily to be pseudo soldered.

Process

Tungsten Copper Spot Welding Electrode Picture

1. Special conditions for improving the contacted resistance and heat dissipation, capacitor discharge welder using large current and short energizing time can be relatively large weld the workpiece large in thickness;

2. Use electrode with different diameter and the small one used in the thin plate or the one with good performance in electrical and thermal conductivity in order to increase the current density and reduce the effect of electrode heat dissipation this side;

3. Use different electrode materials or conductive sheets, one side of the workpiece with good thermal conductivity is poor heat conductivity of copper alloy, to reduce heat loss that side;

4. Use gasket (poor performance in thermal conductivity, thickness is between 0.2-0.3mm) to reduce the heat on this side.

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Tungsten Copper Vacuum Contacts

Tungsten Copper Vacuum Contacts Picture

Tungsten copper vacuum contacts are used in the vacuum arc-quenching chambers (VACs) of highly dependable, quick-acting vacuum circuit breakers capable of breaking large currents in high-voltage 6-35 kW electrical networks. Tungsten copper vacuum contact is a key element in commutation switches (circuit breakers). Currently, the most common material used in contact pairs in VACs are W-(50-90%)Cu composites.

Tungsten copper vacuum contacts are subjected to the effects of short-circuits currents and fusing metals in various points of the surface due to the high density of the current in them; as a result, welding joints form in these zones. This problem was one reason that delayed the development of vacuum commutation technology for more than twenty years. The resistance of a VAC's contacts to welding is one of its key characteristics. The problem of welding was solved by developing special contact plates made from tungsten copper composites, which provided a high breaking capacity for circuit breakers in commutation networks, wear-resistance and resistance of contact pairs to welding.

Tungsten copper vacuum contacts are used in VACs of vacuum contactors with a nominal voltage of 1.14 kW and higher in systems for remote control of electric drivers. Tungsten copper vacuum contacts are a long-lasting means of switching contactors in electric circuits on and off and ensure a low cut-off current in the system.

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Tungsten Copper Laser Heat Sink

Tungsten Copper Heat Sink Picture

Tungsten copper laser heat sink is an integrated circuit chip having a certain function is placed in a container with suitable housing, the chip to provide a stable working environment, protect the chip from less affected by the external environment, so that an integrated circuit having a stable normal function. At the same time the heat sink is chip-chip output, input connecting means outwardly transition, together with the chip to form a complete whole. The heat sink sheet material is required to have a certain degree of mechanical strength, good electrical properties, thermal properties and chemical stability, and according to different categories of integrated circuits and the use of premises, the choice of different package structures and materials.

Tungsten copper laser heat sink combines the advantages of tungsten and copper, both having low expansion characteristics of tungsten, but also has high thermal conductivity properties of copper, its thermal expansion coefficient and thermal conductivity can be varied by adjusting the tungsten copper component, while and coefficient of thermal expansion of silicon, gallium arsenide, and ceramic material matches.

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Tungsten Copper Combination Electrode

Tungsten Copper Combination Electrode Picture

Tungsten copper combination electrode has a combination of tungsten and copper, high temperature resistance, arc ablation, high hardness, high melting point, high strength, high specific gravity, high conductivity, high thermal conductivity, easy cutting, anti-adhesion, and has a transpiration cooling characteristics. Using isocratic pressing - high-temperature sintered tungsten skeleton - copper infiltration process, the production of copper content 6-90% of various large, shaped pieces, high purity, uniform organization performance; compression molding, extrusion molding, injection molding can produce all kinds of sheets, rods, tubes, plates, and shape of the various models of complex products.

Tungsten copper combines with iron to the composite electrode, to eliminate the pores, cracks problem exists in the past, this process uses a welded composite. Tungsten, copper and iron composite electrode composite made of for both tungsten copper, iron materials, combined with high strength, good electrical conductivity.

1. A reasonable mix of tungsten copper, iron, and its mechanical properties is more reasonable, more convenient to use. The small precision electrode machining deformation problem is a good solution;

2.The electrode is directly adsorbed on the the magnetic work bench grinding after processing, flatness, surface finish and dimensional precision are other processing methods are not comparable. Exudes a sense of superiority in the processing of large planar electrode;

3. The electrode after grinding benchmark reproduction is good, especially suitable for the electrode need a multi-step combinations work;

4. A plurality of electrodes can be processed at the same time, can greatly improve the work efficiency;

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Tungsten Copper EDM Rod

Tungsten copper EDM rod has excellent thermal and electrical conductivity, arc erosion resistance and high material removal rate. Especially for tungsten carbide, high-temperature hard alloy mold manufacturing has remarkable performance.
Characteristic

Tungsten copper materials used for electrode accounts for a quarter of total

consumption of tungsten copper, so it not only required high conductivity, material removal rate, low electrode consumption, easy for processing, but also has

Tungsten Copper EDM Rod Picture

requirements as follow:
1. Based on high thermal and electrical conductivity, it also obtains better performance in arc erosion resistance;
2. It is difficult to meet the requirements of the contact by normal process, tungsten copper electrode should has uniformity and high density;
3. It is the most out standing problem that the mold or other products with diverse shape or structure needs different kinds of tungsten copper electrode, but the quantity demanded is relatively low.

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Tungsten Copper Combination Contact

Tungsten copper combination contact, as the name suggests it is combined by tungsten copper with other material. As usual, the shank of contact is iron, and the end of contact is tungsten copper. Contract with general tungsten copper contacts, the advantage of combination contact is the lower costs. But it is very suitable for which some of industry only required high quality in the end of contact, the combination contact could save much costs but also with high properties.

Features

Tungsten Copper Combination Contact Picture

Tungsten copper is choose tungsten as a skeleton, and filled in a copper composite material composition within the pores of the skeleton, skeleton guarantee its high melting point of contact compressive strength, resistance to arc erosion, not only to improve the conductivity of copper, thermal conductivity and improved processing performance, and when the high temperature arc evaporation can absorb a lot of heat from the arc, improve conditions and reduce galvanic action.

Tungsten copper alloy electrician its high density, high thermal conductivity, high strength and hardness, low resistivity, low thermal expansion coefficient, and the resistance to arc burning resistance, welding resistance, electric corrosion resistance and other properties and in electrical contact material advantages of the electrode material is applied on the other material in the short term can not replace.

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Tungsten Copper Handle Electrode

Tungsten copper handle electrode also called tungsten copper composite electrode, one side is tungsten copper, and another side is high tensile steel. Tungsten copper handle electrode uses a unique technology to produce vacuum diffusion welding, surface welding seamless, the overall effect is good, mainly used in EDM electrodes increases efficiency.

Advantages

One benefits of tungsten copper handle electrode is conducive to a magnetic iron

Tungsten Copper Handle Electrode Picture

fixed on a magnetic base so that the processing time to ensure accuracy. Tungsten copper composite electrode is combined with iron, to prevent the use of conventional welding processes this compound in the presence of pores, cracks problem.
1, Tungsten copper combines with iron, which mechanical properties make it more reasonable and easier to use. Small precision machining electrode deformation problem is a good solution;
2, The electrode can be directly adsorbed on magnetic bench grinding its flatness after processing, surface finish and dimensional accuracy than other processing methods can not reach. Utmost superiority in processing large plane electrodes;
3, The reference electrode after grinding reproducibility is good, especially for multi-step combinations need workers electrode;
4, a plurality of electrodes can be processed simultaneously, can greatly improve work efficiency;
5, The loss of the electrode by grinding can be reused, usage rate, a substantial increase in work efficiency and reduce processing costs.
6, A magnetic iron conducive fixed on the magnetic base so that the processing time to ensure accuracy.

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Tungsten Copper Nut Electrode

Tungsten copper nut electrode welds bolt and nut together and achieves higher embossing hardness and higher welding strength, which has been widely used in machinery automation and aerospace fields.

Advantages

1. Tungsten copper has high hardness, high strength and excellent performance in electrical and thermal conductivity;

2. Using one-step forming process, no holes in welding seam and has high precision and concentricity;

3. High torsional strength can effectively ensure the quality and precision of processing;

4. Flexible enough for a range of products, can meet the mass-production and has longer service life.

Application

Combined with tungsten copper and chromium zirconium copper seamlessly. On the one hand, the tip uses tungsten copper with highhardness, wear resistance and excellent electrical and thermal conductivity; on the other hand, electrode base is made of chromium zirconium copper with high temperature strength, good oxidation resistance. With the automatic bump welding equipment, it has a broad application prospect in automotive and aerospace fields.

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Tungsten Copper Contacts

Tungsten Copper Contacts Picture

Tungsten copper 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 alloy electrode materials are used because of tungsten copper alloy electrode unique physical properties. Tungsten copper alloy electrode material offered by us is high quality. We can provide all kinds of tungsten copper electrode as your requirements. Tungsten copper electrode is easy to be machined.

Tungsten Copper Contacts Advantages

Pure tungsten and copper, tungsten copper electrode uniform material, low content of gas and impurity, very high burn-off resistance, excellent thermal and electrical conductivity, all necessary joining and machining processes. 

1, High arc resistance combined with good electrical conductivity 

2, High thermal conductivity

3, low thermal expansion

4, Special tungsten copper alloy products are available at customers' requests

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Tungsten Copper Military Block

Tungsten copper military block has low CTE, high soften temperature, which not only plays an important part in electrical materials, but also has been widely used in high temperature material and military armor material. The most outstanding characteristic is that copper evaporating takes away a part of heat and keep it working stable; in military field, for some missile, penetrator and liner, tungsten copper material remarkably improves armor capability. 

Application

1. Used as EDM electrode, is easy for cutting and has sweat cooling, anti-adhesion, which is suitable for butt welding and projection welding with high requirement of wear resistance and high temperature resistance;

2. It can be widely used in high temperature material, electrical alloy for high-voltage switch, micro-electronics material;

3. Used in vacuum electrical contact, transformer switch contact and some electric upsetting electric forging industry and its good machinability processed into a variety of shapes of the W-Cu contacts as well as a variety of infiltration, casting material;

4. It provides a good solution for the deformation in small precision electrode machining;

5. Used as high temperature components of rocket, missile with high-speed airflow ablation, such as gas vane, nozzle, throat insert, nose con and so on;

6. In the 1990s, copper tungsten material has already begun used as new electronic package and the heat sink material. And it gradually appears in CPU, large-scale integrated circuit, high-power micro-wave device, connection and radiating component. 

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Tungsten Copper Sheet Price on Oct.12, 2018

The 90%W10%Cu tungsten copper sheet price of 11.17mmx3.49mmx0.49mm is $0.81 per piece EXW Xiamen, China on Oct.12, 2018. The MOQ of tungsten copper sheet is 500 pieces, the general tolerance of the thickness is +/-0.05mm, the length and width tolerance is +/-0.1mm. The reference density of 90W10Cu is 16.8g/cm3, the reference hardness is 250HB, the reference conductivity is 27%IACS.

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Tungsten Copper Machining

The method of tungsten copper machining is mainly divided into two categories: infiltration and direct sintering method. In recent years, due to the rapid development of nanotechnology, directly obtained by sintering a great development.The melting point of tungsten, copper vary greatly higher than the boiling point of the copper melting point of tungsten and tungsten copper immiscible, the general method of smelting is difficult to produce tungsten copper alloy, the only powder metallurgy to make tungsten copper composites manufacturing to become a reality.

Tungsten copper machining include the following methods:
Infiltration Method
High Temperature Sintered Tungsten Copper Alloy
Mixed Powder Sintered Copper Infiltration Method
Direct Sintering Method

Our general method is infiltration, the infiltrated divided into high temperature sintered tungsten skeleton copper infiltration and low-temperature sintering mixed powder copper infiltration two.

The following is the picture about our tungsten copper product with which is used infiltration method:

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Tungsten Copper Block

Our tungsten copper block looks like a gold block, it is so beautiful. And the longest length and width we are able to provide is 500mm, and the most thickness is 8mm. We are able to provide the composition with 93W, this material always used on the military industry. The properties of these material is also higher than common materials, so if you have any special required on the properties, you could do not hesitate to contact us.

The following is the block we have finished for your reference:

Tungsten Copper Block Picture

If you have any other special required on the size or properties, you could contact us by sales@chinatungsten.com, and we could reply you as soon as possible.

Sincerely hope could cooperate with you in the near feature.

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Tungsten Copper Content and Properties

Tungsten Copper Product Picture

Different tungsten copper content of different properties as follows.

Cu	Impurity	W	Density	Resistance	Conductance	Hardness(HB)	Bending strength
50±2	0.5	Balance	11.85	3.2	54	1128
45±2	0.5	Balance	12.30	3.5	49	1226
40±2	0.5	Balance	12.75	3.7	47	1373
35±2	0.5	Balance	13.30	3.9	44	1520
30±2	0.5	Balance	13.80	4.1	42	1716	790
25±2	0.5	Balance	14.50	4.5	38	1912	885
20±2	0.5	Balance	15.15	5.0	34	2158	980
15±2	0.5	Balance	15.90	5.7	30	2354	1080
10±2	0.5	Balance	16.75	6.5	27	2550	11

Tungsten copper content is the content of tungsten or copper in the alloy, the normally content for tungsten copper alloy is 10%～50%. Tungsten copper alloy powder metallurgy extraction has good electrical and thermal conductivity, good high temperature strength and a certain degree of plasticity. At very high temperatures, such as above 3000 ℃, copper alloy is liquefied evaporated absorbs heat, reduces the surface temperature of the material. So this kind of material is also referred to as metal sweating material.

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170x170x1.5 Tungsten Copper Sheet Price on Sep. 11, 2018

170x170x1.5mm 80W20Cu tungsten copper sheet price is 85.50USD/PC on Sep. 11, 2018, EXW, Xiamen, China. Copper infiltration is the method to produce tungsten copper. With thickness of 1.5mm, the copper can be infultrated evenly. The sheet is widely used to make heat sink.

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Tungsten Copper Properties

Tungsten copper parts provided by us are all with these properties.

Type	Density (g/cm3)	Conductivity	HB (MPa)	Size (mm)
WCu50	11.9~12.3	≥55 %IACS	1130~1180	Rod: Ø1~50 Length<300 Sheet: Width<190 Length<300 Special type: Width<190 Length<300
WCu40	12.8~13.0	≥47 %IACS	≥1375
WCu30	13.8~14.4	≥42 %IACS	≥1720
WCu20	15.2~15.6	≥34 %IACS	≥2160
WCu10	16.8~17.2	≥27 %IACS	≥2550
WCu7	17.3~17.8	≥26 %IACS	≥2900

The electrical and thermal properties of the alloy vary with different proportions. Copper increases the thermal conductivity, which plays a huge part when being used in circuit breakers. Electrical resistivity with an increase in the percentage of tungsten present in the alloy, ranging from 3.16 at 55% tungsten to 6.1 when the alloy contains 90% tungsten. An increase in tungsten leads to an increase in ultimate tensile strength up until the alloy reaches 80% tungsten and 20% copper with an ultimate tensile strength of 663 MPa. After this mixture of copper and tungsten, the ultimate tensile strength then begins to decrease fairly rapidly.

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Ø6x150 Tungsten Copper Rod Price on Aug. 9, 2018

Ø6x150 80W20Cu tungsten copper rod price is 8.80USD/PC on Jun. 28, 2018, EXW, Xiamen, China. The properties of WCu20 is with density 15.15g/cm3, electricity conductivity 34IACS%, hardness 220HB and tensile strength 980N/mm2. Even thought the price of tungsten related products has been some decreasing, the exchange rate has been changed, so the price can be kept as last month.

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Tungsten Copper W80 Rod

Tungsten copper W80 rod is composed of 80% W and 20% Cu so that high hardness and melting point characteristics of tungsten is more obvious. Its density is up to 15.15g/cm3, hardness reaches more than HB140, but due to less Cu, conductivity is decreasing to 34%IACS, softening temperature is ≥900℃,the bending strength is 980, the thermal conductivity is 190-210(wm/k) and the coefficient of expansion is 8.0-8.5(10-6K).

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Ø6x150 Tungsten Copper Rod Price on Jun. 28, 2018

Ø6x150 80W20Cu tungsten copper rod price is 8.80USD/PC on Jun. 28, 2018, EXW, Xiamen, China. The price of tungsten copper rod remains stable and shows a little decreasing trend as the raw material. However, because most raw material factories are closed for environmental issues, it may be going up in the near future.

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90W10Cu Tungsten Copper Properties

90W10Cu tungsten copper properties are:

At 950 ℃ high speed pressing attainable relative density greater than 80.65% of W skeleton, by infiltration get 90W10Cu composites.

At room temperature, 600 ℃, 950 ℃ for high-speed tungsten preform pressing, pressing as the temperature rises, the green density increases.

High velocity compaction, powder mass increases, due to the ability of additional density decreases, resulting green density decreases. With the increase in the number of high-speed pressing, green density is improved.

Using high-speed pressing technology combined with infiltration of 90W10Cu preparation material and the thermal expansion coefficient and other indicators have reached the requirements of the appropriate heat sink material.

                          

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90W10Cu Tungsten Copper Production Technology

90W10Cu tungsten copper alloy mainly used to suppress the high-speed production technology to prepare, and then in 1400 ℃ high temperature hydrogen furnace infiltrated get 90W-10Cu composite. Research repression affect the quality of the pyrometer compacts green density and microstructure of. The results of surface, with the suppression of the temperature rise, the compact density, high-speed suppression obtained at 950 ℃ relative density greater than 80.65% of W skeleton dense tungsten particles connection, distribution, pore connectivity is good. Compacts increases quality, due to the applied energy density is reduced, leading to the green density decreases. By twice the height of repression, the green density further increases; the relative density of 99.5% 90W10Cu materials, thermal conductivity 175W / (mK), tungsten copper alloy 90W10Cu indicators have reached the requirements of the appropriate heat sink material.

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Tungsten Copper Bar Price on May 23, 2018

100x40x10mm 85W15Cu tungsten copper bar price is 65.00USD/PC on May 23, 2018, EXW, Xiamen, China. The price of tungsten copper bar is going up with tungsten copper raw materials. The main reason goes to the increasing environmental protection cost. 

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