What is tungsten-copper?

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Tungsten-copper refers to an alloy composed of tungsten and copper, with a common copper content ranging from 10% to 50%. The alloy is produced using powder metallurgy methods and exhibits excellent electrical and thermal conductivity, good high-temperature strength, and a certain degree of plasticity. At very high temperatures, such as above 3000°C, the copper in the alloy is liquefied and evaporated, absorbing a large amount of heat and reducing the surface temperature of the material. Therefore, this type of material is also known as a metal sweating material.

Tungsten-copper alloys have a wide range of applications, primarily used to manufacture high-voltage electrical switches resistant to arc erosion, such as contacts for high-voltage electrical switches, rocket nozzle liners, tail rudders, and other high-temperature components. They are also used as electrodes for electrical machining, high-temperature molds, and other applications requiring electrical and thermal conductivity and high-temperature usage.

Tungsten-copper is made from fine tungsten and copper powders, and is produced through a superior infiltration and sintering process. It can withstand temperatures of up to nearly 2000°C and high stress, exhibiting high melting point, high hardness, resistance to burning loss, and good anti-adhesion properties. The surface of the eroded product is highly smooth and precise, with low wear and tear.

Tungsten-copper is widely used as contacts for high-voltage, ultra-hydraulic switches and circuit breakers, protective rings, materials for electric heating punches, automatic submerged arc welding contacts, plasma cutter nozzles, welding machine electrodes, butt welding electrodes, roll welding wheels, sealing gas electrodes, spark electrodes, spot welding, touch welding materials, and more.