ENHANCEMENT OF SURFACE HARDNESS OF MILD STEEL BY USING EDC

Abstract

Electro discharge machining (EDM) is a typical machining process, which is widely used for machining of very hard materials used for engineering purposes for different field. In Electrical Discharge Coating (EDC) process tool electrode which is manufactured by powder Metallurgy and connected to anode with sample work-piece is selected as cathode in electro discharge machine. In presence of dielectric, tool electrode is worn out during EDM and the material removed from the surface of electrode deposited over the work-piece surface. This paper is expressing an advanced method of surface modification by EDC and work carried on Titanium Carbide and Copper (TiC- Cu) composite Coating deposited on mild steel substrate. Titanium (Ti) and Copper (Cu) powder in different weight percentages has been used for preparation of tool electrode by P/M process. Micro hardness testing has been performed on the coating to measure the hardness values of coated surface.