Improvement of wear resistance by EDM with tungsten carbide P/M electrode

Electrodischarge machining with pulsing relaxation generator using a powder compact electrode and reverse polarity setting modifies the surface properties of a machined surface greatly. Using a hard and wear-resistant material in the compact, the wear resistance of the resultant surface can be improved. In the present investigation, tungsten carbide powder is used in the compact. The wear resistance is evaluated by cutting tests and the results show considerable improvement over the uncoated surfaces. © 1994.