Tungsten Copper

Product Specifications

Prod Model:	W70 W75 W80 W85 W90 W60
Markets:	North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid East,Eastern Asia,Western Europe

Product Description

Tungsten copper alloy composite metal tungsten and copper (silver), the advantages of the high melting point (melting point is 3410 ºC, tungsten copper melting point 1083 ºC), density (density of 19.34 g/cm3, tungsten copper density is 8.89 g/cm3);Copper (silver) and thermally conductive performance is superior, the tungsten copper alloy (composition generally range for WCu7 ~ WCu50) uniform microstructure, high temperature resistant, high intensity, high arc ablation resistance, dense;Conductive, thermal conductivity is moderate, is widely used in high temperature resistant material, high voltage switch electrical alloy electrode, microelectronics, electric processing material, as spare parts and components are widely used in aerospace, aviation, electronics, electric power, metallurgy, machinery, sports equipment and other industries.
Of tungsten copper alloy, tungsten copper of two elements of a two-phase structure of false alloy, metal matrix composites.Due to copper and tungsten physical differences, therefore cannot be fused method is adopted to improve the production, generally using powder metallurgy technology to receive now.The powder metallurgy method for making tungsten copper alloy process for mixing, pressing molding, sintering melt infiltration, cold working
1. The electrical contact materials
Tungsten copper materials is a very important application of high voltage electric switch electric contact.Electrical contact materials, which is also called contact or contact, is the key to the high and low voltage electrical components, assuming the role of connect and breaking current, a direct impact on the reliability of the switch, electrical and service life.Tungsten copper alloy contact in the process of arc, the surface layer of low melting point of copper melt first, due to capillary action by adsorption in tungsten skeleton capillary hole, under the action of high temperature arc evaporation and take away a lot of calories, cools the tungsten skeleton, making contact with good open circuit performance.Tungsten skeleton because of the high melting point, in the arc ablation minimal, even if the local temperature is too high will not happen fusion welding, thus ensuring the stability of the switch performance, reliability and long life.And tungsten content is higher, the loss of the resistance, the better, but the low conductivity, specific to the use of specific options.
At present, the electrical contact with tungsten copper materials in addition to conventional high voltage electric switch, is its main development: one is for the use of ultra-high pressure tungsten copper electric contact, as primary from 500000 v to 750000 v or 2 million v above development;Second, the medium voltage vacuum tungsten copper materials.For vacuum tungsten copper contact materials in addition to the requirements by the conventional electric contact performance, special requirements for vacuum application material very low gas content, this requires that adopts the special manufacture process, such as high temperature or vacuum degassing, vacuum melt infiltration, etc.Vacuum tungsten copper contact materials with the traditional tungsten copper different contact material is also developed high tungsten and low copper tungsten copper products, such as W - Cu10, W - Cu15, etc.Certain conditions of use for low values of intercepting tungsten and copper material, can add a small amount of the three metals such as antimony, bismuth, tellurium and so on.

Type Composition Properties element Content wt% Density CTE ppm/K TC, W/m·K Mass density, g/cm3 Relative density, %T.D W90Cu W Cu 90±1 balance 17.0 ≥99 5.6~6.5 180~190 W85Cu W  Cu 85±1 balance 16.3 ≥99 6.3~7.0 190~200 W80Cu W  Cu 80±1 balance 15.4 ≥99 7.6~9.1 200~220