EDM is a thermal process that involves melting and vaporization of the work-piece. During EDM, both are submerged in the electrically resistant dielectric oil. The EDM process uses electrical discharges to remove material from the workpiece, with each spark producing a temperature of between 10,000-20,000C. Consequently, the workpiece is subjected to a heat affected zone. Tungsten carbide is a chemical compound containing tungsten and carbon. Its extreme hardness makes it difficult to machine. In this book the main effect, interaction between factors on Material removal rate MRR] and...