What are the main applications of tungsten-copper alloys?

Tungsten-copper alloy combines the advantages of tungsten and copper, among which tungsten has a high melting point (3410℃ for tungsten and 1080℃ for copper) and a high density (19.34g/cm3 for tungsten and 8.89 g/cm3 for copper). Copper has excellent conductivity and thermal conductivity, and tungston-copper alloy (the general composition range is WCu7~WCu50) has uniform microstructure, high temperature resistance, high strength, arc ablation resistance and high density. Moderate electrical and thermal conductivity, widely used in military high temperature resistant materials, high voltage switch electrical alloy, electromachining electrode, microelectronics materials, as parts and components are widely used in aerospace, aviation, electronics, electric power, metallurgy, machinery, sports equipment and other industries. Tungsten copper alloy is used in aerospace as nozzle, gas rudder, air rudder and nose cone of missile and rocket engine. The main requirements are high temperature resistance (3000K~5000K) and high temperature airflow erosion resistance. The main use of copper volatilization at high temperature formed by sweating refrigeration (copper melting point 1083℃) to reduce the surface temperature of tungsten copper. It is guaranteed to be used under extreme conditions of high temperature. Tungsten copper alloy in the high voltage switch 128kV SF6 circuit breaker WCu/CuCr, and high pressure vacuum load switch (12kV 40.5KV 1000A), lightning arrester has been widely used, high pressure vacuum switch small size, easy to maintain, wide range of use, can be used in wet, flammable and corrosive environment. The main performance requirements are arc ablation resistance, welding resistance, small cutoff current, less gas content, low thermal electron emission capacity. In addition to the conventional macro performance requirements, but also require porosity, microstructure properties, so to take special technology, vacuum degassing, vacuum fusion and other complex processes.

Tungsten-copper tube an alloy of tungsten and copper. The copper content of common alloys is 10% ~ 50%. The alloy is made by powder metallurgy and has good conductivity, high temperature strength and certain plasticity. At very high temperatures, such as above 3000℃, the copper in the alloy is liquefied and evaporated, absorbing a lot of heat and reducing the surface temperature of the material. So this kind of material is also called metal sweat material. Tungsten copper alloy has a wide range of uses, mainly used in the manufacture of arc ablative resistance of high voltage electrical switch contacts and rocket nozzle throat liner, tail rudder and other high temperature components, also used for electrical processing electrodes, high temperature mold and other requirements of conductive and thermal conductivity and high temperature applications