Requirement of processes with high productivity leads to the development of new tools and machining technique. One such attempt was made to develop a Copper Composite (CC) tool reinforced with graphite particles through the stir casting route. The CC tool was utilized to machine the Inconel 718 alloy using Electric Discharge Machining (EDM) technique by varying input variables viz tool material, discharge current, pulse on time, pulse off time and gap distance. Brass, Copper, Copper—5% Graphite (CG5), Copper—10% Graphite (CG10), Copper—15% Graphite (CG15) are the various used tool material whereas Material Removal Rate (MRR), Tool Wear Ratio (TWR) and Surface Roughness (R_a) were recorded as responses. The results revealed that using the CG10 and CG15 tools causes arcing and open circuit under some parametric conditions. CG5 offers best MRR and least TWR owing to the bridging effect, high thermal conductivity and lesser density which was suitable for roughing operation whereas brass offers least R_a which was recommended for finishing operation. The surface topography was analyzed with the aid of Scanning Electron Microscope (SEM). Micro crack, pock marks, globules and remelted layers are some of the defects observed in surface morphology. The process parameters was optimized using VIKOR technique.

对高生产率工艺的要求导致了新工具和加工技术的发展。一种这样的尝试是开发一种通过搅拌铸造路线用石墨颗粒增强的铜复合材料 (CC) 工具。CC 刀具用于使用放电加工 (EDM) 技术通过改变输入变量即刀具材料、放电电流、脉冲开启时间、脉冲关闭时间和间隙距离来加工 Inconel 718 合金。黄铜、铜、铜 — 5% 石墨 (CG5)、铜 — 10% 石墨 (CG10)、铜 — 15% 石墨 (CG15) 是各种使用的刀具材料，而材料去除率 (MRR)、刀具磨损率 (TWR)和表面粗糙度 (R _a) 被记录为响应。结果表明，在某些参数条件下，使用 CG10 和 CG15 工具会导致电弧和开路。由于桥接效应、高热导率和较小的密度，CG5 提供了最好的 MRR 和最低的 TWR，适合粗加工操作，而黄铜提供的 R _a最低，推荐用于精加工操作。借助扫描电子显微镜 (SEM) 分析表面形貌。微裂纹、麻点、小球和重熔层是在表面形态中观察到的一些缺陷。使用 VIKOR 技术优化工艺参数。