Copper tungsten alloy is what color

copper tungsten materials of tungsten-copper alloy exhibits most of the orange, but according to the proportion of tungsten copper, the color can change. If the content of copper as many colors tend to be the color of copper, tungsten, if the proportion tends to tungsten color, the silver-white.
Tungsten copper alloy in high-voltage switchgear 128kV SF6 circuit breakers WCu / CuCr in, as well as high-voltage vacuum load switch (12kV 40.5KV 1000A), surge arresters are widely used, high-voltage vacuum switch, small size, easy maintenance, using a wide range of energy in the wet, use flammable and corrosive environments. The main performance requirement is resistance to arc erosion, anti-welding, off current is small, less gas, low thermal electron emission ability. In addition to conventional macro performance requirements, but also requires the porosity, microstructure properties, it should take a special process, the need to vacuum degassing, vacuum infiltration and other complex processes.
Early EDM electrode made of copper or graphite electrodes, inexpensive but impatience ablation, has been largely replace tungsten copper electrode. Advantages of tungsten copper electrode is high temperature, high temperature strength, resistance to arc ablation, and thermal conductivity good performance, fast heat dissipation. Applications concentrated in EDM electrodes, welding electrode and high voltage discharge electrodes.
EDM electrode is characterized by many different specifications, the total volume is small and more. As EDM Electrode tungsten copper material should have as high a uniformity of density and organizations, in particular the elongated rod, tubular and shaped electrodes.
W-Ni- Fe alloy is composed of W, Ni, Fe powder is mixed pressing sintering. Wherein the amount of tungsten up to 80% to 90% and nickel, iron acts as bonding agent. After a two-phase alloy liquid phase sintering, density and theoretical density similar. Nickel is a liquid phase sintering process essential element, generally an amount of 0.5% to 12%, if more than 12%, the heat resistance of the alloy and the corrosion resistance are lowered. Iron content is generally between 0.5% to 8%, if more than 8% of the brittleness of the alloy increases. Iron in the alloy can improve the strength and ductility of these alloys have a certain magnetic core material can be used as armor-piercing bombs, cluster bombs, high anti-fragment momentum, the counterweight and other industrial fields. Compared with the W-Ni-Cu alloy strength and ductility of the alloy are better.