Silver tungsten Alloy (W-Ag), also called tungsten silver alloy, is the composite of tungsten and silver, The silver and tungsten composite group combines the high thermal and electrical conductivity of silver with the high erosion resistance of the high melting tungsten, which own it excellent performance of tungsten and silver. These materials are also characterized by their high strength and their resistance to welding or sticking. They are principally made by infiltration and the nominal silver content varies from 20-50%. By increasing the amount of tungsten, the hardness and welding is reduced. It is used widely in such industries as engine, electric power, electron, metallurgy, spaceflight and aviation.
The manufacturing process is as follows: press the refractory metal, sinter the pressed compact at a high temperature, and infiltrate it with copper. All this is done under very closely controlled conditions. The result is a relatively hard material with superior arc and wear resistance, high physical Properties: at elevated temperatures, and good electrical and thermal conductivity.
Tungsten Silver Alloy Applications
1. Circuit breakers
2. Earth leakage breakers
3. Miniature circuit breakers
4. Resistance welding electrode
5. Wear resistance shaft