Effect of Current and Pulse-on Time on Material Removal Rate and Surface Roughness of Tungsten Carbide in Electric Discharge Machine Die-sinking

The focus of manufacturing for tungsten carbide applications often demands a smooth surface quality as the result Electric Discharge Machine (EDM) die-sinking process, especially in manufacture die and mold with material processed using EDM machine. purpose this study is to analyze effect electric current pulse-on time on Material Removal Rate (MRR) roughness carbide. Through experimental method, parameters varied, namely 17 A, 20 23 30 µs, 55 80 µs. MRR was calculated through weight loss. Surface obtained from tester Scanning Electron Microscope morphology. results showed that highest removal rate 1.509 mm3/min at A lowest 0.262 value 4.278 µm 2.166 topography are crater, globule, crack, porous. greater used, higher roughness. Meanwhile, decreases, increases.