Experimental investigation on electro-discharge surface modification phenomenon of P20+Ni die steel using green P/M composite electrode

In the present work, attempts have been made to optimize EDM process with an aspect of surface modification AISI P20+Ni die steel using powder metallurgy (P/M) electrode. Experiments performed according central composite rotatable (CCD) design response methodology (RSM). Effects compaction pressure (Cp), peak current (Ip), pulse-on time (Ton), and duty cycle (τ) were correlated roughness (SR) microhardness (MH). Adequacy mathematical model has checked by performing ANOVA. Composite desirability approach was used obtain optimal set parameters for minimum SR maximum MH. The errors between predicted experimental value responses at MH maintain within 5.26% -3.64% respectively. Scanning electron microscope energy dispersive spectroscopy analysis confirmed transfer P/M electrode material on work surface. result indicates three times improvement in EDMed