Analysis of surface integrity and dimensional accuracy in EDM of P91 steels

被引:8
作者
Kumar, Prakash [1 ]
Dewangan, Shailesh [1 ]
Pandey, Chandan [2 ]
机构
[1] Birla Inst Technol, Dept Prod Engn, Ranchi 835215, Jharkhand, India
[2] Indian Inst Technol, Dept Mech Engn, Jodhpur 342037, Rajasthan, India
关键词
Electric discharge machining (EDM); Dimensional accuracy; Response surface methodology (RSM); Surface integrity; P91; steel; OPTIMIZATION;
D O I
10.1016/j.matpr.2020.03.119
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
For any type of machining process, surface integrity and dimensional accuracy is a critical examination for machined material. Electro-discharge machining (EDM) process is the most effective method for surface integrity and dimensional accuracy evaluation of the machined surface. The present research work focused to investigate the influencing of machining parameters (pulse current, pulse on time and duty cycle) on machining of P91 tool steel. During the machining process, quantitively measurement of surface roughness (SR) and surface crack density (SCD) has been considered as surface integrity. Dimensional accuracy is characterized by over cut (OC) in this process of machining. In this study EDM parameters arranged using RSM-based design of experiment, on SCD, SR, and OC and study their individual impact on these response parameters. Pulse current is the most significant factor as compared to other parameters for the machining in EDM. The current work also recommends an optimum setting of system parameters for obtained good dimensional accuracy and surface integrity after P91 tool steel machining with EDM. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码:5378 / 5383
页数:6
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