Application of new tool material for electrical discharge machining (EDM)

Bulletin of materials science

L C Pathak²  A K Khanra¹  M M Godkhindi¹ 

[1] Department of Metallurgical and Materials Engineering, National Institute of Technology, Warangal 506 004, India$$Department of Metallurgical and Materials Engineering, National Institute of Technology, Warangal 506 004, IndiaDepartment of Metallurgical and Materials Engineering, National Institute of Technology, Warangal 506 004, India$$;MST Division, National Metallurgical Laboratory, Jamshedpur 831 007, India$$MST Division, National Metallurgical Laboratory, Jamshedpur 831 007, IndiaMST Division, National Metallurgical Laboratory, Jamshedpur 831 007, India$$

关键词: EDM;    SHS;    sintering;    composite;    metal removal rate;    surface roughness.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

In EDM, Cu and graphite are commonly used as tool materials. The poor wear resistance is the drawback of these tools. In the current study, an attempt has been made to develop a ZrB₂â€�?�Cu composite as an EDM tool material to overcome this problem. Initially, the ZrB₂ powder is prepared by self-propagating high-temperature synthesis (SHS) technique and synthesized powder is mixed with different amounts of Cu powder. Dense composite is developed by a pressureless sintering at 1250°C. The composites are tested as tool material at different EDM process parameters during machining of mild steel. The ZrB₂â€�??40 wt% Cu composite shows highest metal removal rate (MRR) with significant tool removal rate (TRR) than other composites. The performance of ZrB₂â€�??40 wt% Cu composite is compared to conventional Cu tool. The composite shows higher MRR with less TRR than Cu tool but it shows more average surface roughness and diameteral overcut than Cu tool.

【 授权许可】

Unknown