A Study Comparative of Cu and Cu-Zn Electrode during Electrical Discharge Machining on Martensitic Stainless Steel AISI 410

Abstract

The objective of this research is to study comparisons of Cu and CuZn electrodes, during Electrical Discharge Machining (EDM) of martensitic stainless AISI 410. The workpiece material was a rectangular plate, measuring 30x50x5 mm. The conditions of the EDM process were 3.0mm depth and 2.0 mm diameter, with variables of parameter being: currents, on/off-times and open circuit voltages of spark. Evaluation of the electrical discharge was conducted using Material Removal Rate (MRR), Electrode Wear Ratios (EWR) and Arithmetical Mean Roughness (Ra), respectively. The results found that CuZn electrode materials provide higher MRR and EWR than electrode materials of Cu. Also, when considering the melting of white layer, initial melts found that the white layer surface material is also good for the integrity of the state park, and it was additionally also found that when the current level increases, then that will rise accordingly.