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Performance analysis of copper-based MWCNT composite coated 316L SS tool in electro discharge machining
Machining Science and Technology ( IF 2.7 ) Pub Date : 2021-01-11
Prosun Mandal, Subhas Chandra Mondal

Abstract

The tool material properties are essential key factors for the enhancement of electro discharge machining performance mainly, resistance to the wear of tool, removal of material from workpiece, and machined surface quality. In this study, copper-based multi-wall carbon nanotube (MWCNT) composite coated 316 L stainless steel electrode was fabricated by electrodeposition method and used in EDM operation for investigating machining performance. The agglomeration problem of MWCNTs was a critical issue for fabrication copper matrix composite, which was addressed with a cationic dispersing agent. The copper-based MWCNT composite coated electrode was used for machining of 304 SS workpiece. The experimental results show 57.11% reduction of tool wear rate (TWR) and 99.52% improvement of material removal rate (MRR) for copper-based MWCNT composite coated electrode compared to pure copper coated 316 L SS electrode. The enhancement of surface quality was also observed for the machined surface, which was generated during the machining with copper-based MWCNT composite coated electrode. The micro-crack formation was almost eliminated by using copper-based MWCNT composite coated electrode, which will enhance the strength and fatigue property of machined component. The enhancement of micro-hardness was also observed for the machined surface.



中文翻译:

铜基MWCNT复合涂层316L SS刀具的电火花加工性能分析

摘要

刀具材料的性能是提高电火花加工性能的主要关键因素,主要是提高刀具的耐磨性,从工件上去除材料以及加工表面质量。本研究采用电沉积方法制备了铜基多壁碳纳米管(MWCNT)复合涂层316 L不锈钢电极,并将其用于EDM操作中以研究加工性能。MWCNTs的团聚问题是制造铜基复合材料的关键问题,可以用阳离子分散剂解决。铜基MWCNT复合涂层电极用于加工304 SS工件。实验结果表明刀具磨损率(TWR)降低了57.11%,降低了99%。与纯铜涂层316 L SS电极相比,铜基MWCNT复合涂层电极的材料去除率(MRR)提高了52%。还观察到加工表面的表面质量提高,这是在铜基MWCNT复合涂层电极加工过程中产生的。通过使用铜基MWCNT复合涂层电极几乎消除了微裂纹的形成,这将增强机械加工部件的强度和疲劳性能。还观察到加工表面的显微硬度的提高。通过使用铜基MWCNT复合涂层电极几乎消除了微裂纹的形成,这将增强机械加工部件的强度和疲劳性能。还观察到加工表面的显微硬度的提高。通过使用铜基MWCNT复合涂层电极几乎消除了微裂纹的形成,这将增强机械加工部件的强度和疲劳性能。还观察到加工表面的显微硬度的提高。

更新日期:2021-01-11
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