Tungsten copper electrode for EDM

Tungsten copper electrode material should make the EDM process stable, high productivity, good surface quality of the workpiece, and the electrode material itself should be rich in sources and low in price. In the tungsten copper composite material, tungsten can form an insoluble skeleton, so that the material has the performance of electric isolation, wear resistance and high temperature resistance, and copper has excellent conductivity function.

Tungsten copper alloy is a good combination of tungsten and copper characteristics, so that it has a good comprehensive performance. In the process of EDM operation, any structural morphology of the electrode material will be reflected on the surface of the workpiece like a mirror. Therefore, the preparation of high density tungsten copper alloy is the key to obtain high performance tungsten copper electrode. The miscibility of tungsten and copper determines that tungsten copper alloy can only be manufactured by powder metallurgy process, and the common methods are ordinary sintering method and infiltration method, but it is difficult to make tungsten copper alloy with high relative density.

MD Tungsten & Molybdenum Company supplies tungsten copper composites from 50W-50Cu to 90W-10Cu, by using isostatic pressing, high-temperature sintering and copper infiltration process. We can produce semi-finished forms like plate, sheet, rod, bar, tube, as well as complicated custom-shaped forms by die molding, extrusion or injection molding, in large or very small sizes.

Features of our tungsten copper

•  50WCu – 90WCu
•  Tailor-made composition and properties such as CTE
•  Homogenous structure, excellent performance
•  High precision
•  Good machinability and mechanical strength

Available forms

•  Plate, sheet, foil, shim
•  Rod, tube
•  Arc erosion electrodes,flange
•  Heat sinks, base plate,chip carrier, substrate
•  Custom-made per drawing

Grade: W80Cu20, W75Cu25, W90Cu10 W92.5NiFe W97NiCu

Density: (16.8~18.5)g/cm3

Copper tungsten (CuW, WCu) has been recognized as a highly conductive and erasion resistant composite material that is extensively used as copper tungsten electrodes in EDM machining and resistance welding applications, electrical contacts in high voltage applications, and heat sinks and other electronic packaging materials in thermal applications.

The most common tungsten/copper ratios are WCu 70/30, WCu 75/25, and WCu 80/20. Other common compositions include tungsten/copper 50/50, 60/40, and 90/10. The range of available compositions is from Cu 50 wt.% to Cu 90 wt.%. Our tungsten copper product range includes copper tungsten rod, foil, sheet, plate, tube, tungsten copper rod, and machined parts