Tungsten copper electrode
Tungsten-copper electrode combines the advantages of metallic tungsten and copper, wherein the tungsten melting point is high (tungsten melting point is 3410℃, iron melting point is 1534℃), and the density is large (tungsten density is 19.34g/cm3, iron density is 7.8 g/cm3). Copper excellent conductivity, tungsten and copper alloy (composition generally ranging from WCu7 to WCu50) uniform microstructure, high temperature resistance, high strength, resistance to arc ablation, large density; With moderate electric and thermal conductivity, it is widely used in military high-temperature resistant materials, electrical alloys for high-voltage switches, electrical processing electrodes, and microelectronic materials. As components and components, it is widely used in aerospace, aviation, electronics, electricity, metallurgy, machinery, sports equipment and other industries.
A tungsten copper alloy, military high temperature resistant materials in aerospace as missile and rocket engine nozzle, gas rudder, air rudder, the nose and main demands are resistant to high temperature (3000 k to 5000 k), high temperature resistant air scour capability, the main use of copper volatilization forming at high temperature of diaphoresis cooling (copper melting point 1083 ℃), decrease the temperature of tungsten copper surface, guarantee under the condition of high temperature extremes.
2. Tungsten and copper alloy for high-voltage switch is widely used in high-voltage switch 128kV SF6 circuit breaker WCu/CuCr, as well as high-voltage vacuum load switch (12kV 40.5kv 1000A), and lightning arrest.the high-voltage vacuum switch is small in size, easy to maintain, and has a wide range of application. The main performance requirements are resistance to arc ablation, resistance to fusion welding cut-off current, small gas content, low thermal electron emission capacity. In addition to the conventional macro performance requirements, also requires the porosity, microstructure performance, so to adopt a special process, need to vacuum degassing, vacuum melting and permeability and other complex processes.
Three, electric processing electrode electric discharge machining electrode early use of copper or graphite electrode, cheap but not resistant to ablation, now has been basically replaced by tungsten copper electrode. The advantages of tungsten and copper electrodes are high temperature resistance, high temperature strength, resistance to arc ablation, and good conductivity, fast heat dissipation. Applications are concentrated in spark electrode, resistance welding electrode and high voltage discharge tube electrode. Electromachining electrode is characterized by a variety of specifications, small batch and a large amount of total. The tungsten-copper material as the electrode for electric processing should have the highest possible density and the homogeneity of the structure, especially the slender rod, tube and heteromorphic electrode.
