Tungsten Copper Button Contact

Tungsten copper button contact is main parts for high-voltage circuit breakers, switchgear, disconnections and grounding switch. In the high-pressure, high pressure SF6 circuit breaker system, the arc contact currently used to CuW based alloy, moving past the arc contact arcing contacts are finger - spring structure, which complicated the work of the spring heat, its reliability is deteriorated.

Tungsten Copper Button Contact Picture

Tungsten copper button contact in appliances bear making, carrying and breaking normal current and fault current function, it requires low contact resistance and reliability, long life and so on. Since the electrical conditions vary greatly, therefore, on the contact material presented diverse performance requirements. But for a variety of performance requirements, none of the contact material can be fully satisfied, it must be selected according to the different characteristics of various materials.

With the rapid development of modern industry, industrial electrical control, increasing the level of intelligence, increasing high voltage transmission network load, low-voltage power distribution and control systems as well as the continuous development of the electronics industry update replacement products. Electrical products to large capacity, small size and direction, along with electrical products for heart device - electrical contact material put forward higher demands to the material under tremendous heat and arcing Joule heat, the melting does not occur good welding, mechanical wear and abrasion resistance, electrical properties; metal produced in the process of breaking splashes should not be excessive, arcing time not too long; in the current environment, good welding resistance, low and stable contact resistance.

Around the national key pillar industry in the future will develop multi-family, high-performance electrical alloy products. Electrical contact materials will be increasingly automated production lines, further to the element of direction, the development of advanced, practical and efficient special tooling equipment, improve reliability, stability, corrosion resistance and other properties of the product.

Any feedback or inquiry of tungsten copper alloy products please feel free to contact us:

Email: sales@chinatungsten.com

Tel.: +86 592 512 9696 ; +86 592 512 9595

Fax.: +86 592 512 9797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Tungsten Copper Heat Sink

Chinatungsten offers special high conductivity and low thermal expansion metals and ceramic materials. All materials are available as finished components and in sheet form. Metals are available either as composites or as laminated sheets.

Tungsten Copper Heat Sink Picture

Tungsten copper heat sink have very high in plane conductivity provide by layers  of copper andtungsten copper heat sink picture 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.

Tungsten copper heat sink is made by infiltrating, under vacuum, uniform controlled porous blocks of tungsten with molten cotungsten copper heat sink picturepper. 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%.

Tungsten copper heat sink is made by sintering molybdenum and copper together. This results in a tungsten copper heat sink of lower density, low CTE and excellent thermal conductivity.

Any feedback or inquiry of tungsten copper alloy products please feel free to contact us:

Email: sales@chinatungsten.com

Tel.: +86 592 512 9696 ; +86 592 512 9595

Fax.: +86 592 512 9797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Tungsten Copper Slab

Tungsten Carbide Slab Picture

Tungsten copper slab with the properties of tungsten’s high strength, high stiffness, low thermal expansion coefficient and copper’s high plasticity, good electrical and thermal conductivity and other properties. In large scale integrated circuits and high-power microwave devices, tungsten copper alloy material as the substrate, the slug, connectors and cooling components have developed rapidly. However, tungsten copper alloy sheet when used as electronic packaging materials, the density must be greater than 98% theoretical density, in order to ensure a high thermal conductivity, thus increasing the density of tungsten copper alloy tungsten copper alloy sheet is the key to performance guarantees.

Major existing technology tungsten copper slab processing includes the following:

(1) Hot forging + cold forging processing method; the method by forging machinery to exert pressure on tungsten-copper alloy billets, processing temperature higher than the recrystallization temperature of copper to produce plastic deformation in order to obtain a high-density alloy material, and then follow the product requirements again after forging at room temperature to give the desired material specifications.

(2) Hot + complex pressure finishing treatment method; this method is applied simultaneously sintered tungsten-copper alloy unidirectional pressure to give higher relative density of the alloy, then in order to achieve the desired size, and then the sintered alloy material is re-pressed.

(3) Multi-pressure hot-rolled + finishing treatment method; the method by recrystallization temperature higher than copper, to increase the density of the sintered alloy of tungsten copper alloy rolled on the hot strip mill, then according to the required size of the tungsten copper alloy re-pressed.

However, a closer analysis shows that the above processing method, the processing method of the prior tungsten copper alloys are a series of problems, first of all the issues involved is the production cycle is too long, generally two to three production processes to produce a thickness of less than 1mm tungsten copper alloy sheet, for example, at least in its production cycle over two to five days; the second is high energy consumption: hot forging, hot rolling, annealing and other processes required high-power high-temperature furnace, high energy consumption; and now art methods of low yield, at high temperatures can easily cracking scrap processing, production of tungsten copper alloy sheet thickness of 1mm for example, the integrated rate of about 50% finished; in addition, the prior art methods use large equipment investment the type and quantity more, and most of high power and large-tonnage processing equipment, requires larger processing site.

Any feedback or inquiry of tungsten copper alloy products please feel free to contact us:

Email: sales@chinatungsten.com

Tel.: +86 592 512 9696 ; +86 592 512 9595

Fax.: +86 592 512 9797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

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.

Any feedback or inquiry of tungsten copper alloy products please feel free to contact us:

Email: sales@chinatungsten.com

Tel.: +86 592 512 9696 ; +86 592 512 9595

Fax.: +86 592 512 9797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

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.

Any feedback or inquiry of tungsten copper alloy products please feel free to contact us:

Email: sales@chinatungsten.com

Tel.: +86 592 512 9696 ; +86 592 512 9595

Fax.: +86 592 512 9797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

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.

Any feedback or inquiry of tungsten copper alloy products please feel free to contact us:

Email: sales@chinatungsten.com

Tel.: +86 592 512 9696 ; +86 592 512 9595

Fax.: +86 592 512 9797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

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.

Any feedback or inquiry of tungsten copper alloy products please feel free to contact us:

Email: sales@chinatungsten.com

Tel.: +86 592 512 9696 ; +86 592 512 9595

Fax.: +86 592 512 9797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.