Tungsten Copper Electrode

Tungsten copper electrode is kind of composite metal material and is composed of high purity tungsten powder and good conductivity Cu powder through isostatic pressing and high temperature sintering. Therefore, tungsten copper electrode not only has high melting point(3410℃) and high density (19.34 g/cm³) of W, but also has good conductivity and other advantages of Cu.

According to applications, tungsten copper electrode can be specifically divided into resistance welding electrode, EDM electrode and the electrode of high pressure discharge tube, etc.

1 .Resistance Welding Electrode

Resistance welding electrode is using thermal resistance for welding, which is produced by the pressure of electrode and current run through contact area or close area. It takes advantage of the thermal resistance to melt or model the work-piece and combined it with metal. Resistance welding can be also divided into four types, such as spot weld, caulk weld, beading weld and butt weld. The material of electrode plays a significant role in resistance welding, which can press the welding parts, supply great amount of current and promote the welding area cool down and so on.

2. EDM Electrode

EDM (Electrical Discharge Machining) is also called as discharge machining or electric corrosion machining, which uses pulse discharging between electrodes. The principle is that the electrode and the work-piece used as two poles and put the liquid in the gap of discharge, the pulse voltage will puncture the liquid when the distance decreasing. tungsten copper has good high temperature resistance, high strength under high temperature, arc resistance, excellent conductivity and radiating so that it can be widely used in EDM, resistance welding and high pressure discharge tube electrode. The electrode for EDM is various, as tungsten copper electrode, it should be high density and good uniformity, especially rod, pipe and other shapes of electrodes. In addition, due to the advantage of tungsten, tungsten copper has high electrical speed, low wear rate, accurate shape and excellent anti-corrosion, which increases the accuracy of products.

3. High Pressure Discharge Tube

Discharge tube is a kind of device for preventing from high voltage in input. If the voltage of two ends is high than the limit, there will be internal short circuit and absorb the input high voltage. Combine the high density and high melt point of tungsten with the good plasticity and excellent conductivity of Cu, tungsten copper electrode uses fine tungsten powder and Cu powder and through high temperature sintering and isostatic pressing.