Tungsten-copper alloy combines the advantages of metal tungsten and copper. Among them, tungsten has a high melting point (the melting point of tungsten is 3410°C and the melting point of iron is 1534°C) and high density (the density of tungsten is 19.34g/cm3 and the density of iron is 7.8g/cm3) ; Copper has excellent electrical and thermal conductivity. Tungsten-copper alloy (generally composed in the range of WCu7~WCu50) has a uniform microstructure, high temperature resistance, high strength, arc ablation resistance, and high density; it has moderate electrical and thermal conductivity and is widely used in high temperature resistant materials, Electrical alloys, electrical machining electrodes, and microelectronic materials for high-voltage switches are widely used as parts and components in aerospace, aviation, electronics, electric power, metallurgy, machinery, sports equipment and other industries.

【Application fields】

1. Electrical alloys for high-voltage switches

Tungsten copper alloy is widely used in high-voltage switches, 128kV SF6 circuit breakers WCu/CuCr, and high-voltage vacuum load switches (12kV 40.5KV 1000A) and arresters. High-voltage vacuum switches are small in size, easy to maintain, have a wide range of use, and can be used in wet, Used in flammable, explosive and corrosive environments. The main performance requirements are resistance to arc ablation, resistance to fusion welding, small cut-off current, low gas content, and low thermal electron emission capability. In addition to conventional macroscopic performance requirements, porosity and microstructural properties are also required, so special processes must be