摘要：In the present work Electric discharge machining process has been used for surface modification of AISI 1045 Die steel with copper chromium (Cu Cr) electrodes (made through powder metallurgy technique) by varying different machining parameters such as peak current, pulse on-time, pulse off-time and compaction pressure. Parametric optimization of Surface Deposition Rate, Surface Roughness and Micro Hardness was carried out by using Central Composite Design technique. Material characterization was also performed using X-Ray Diffraction and Scanning Electron Microscope to study the structure of the modified surface layer. It has been found that hardness increases by two times as compared to the base material. By the use of copper-chromium composite electrode, chromium particles gets collected on the surface which modified the work piece surface by increasing its corrosion and wear resistance The input process parameter pulse off-time has greater effect on surface deposition rate followed by peak current, pulse on-time and compaction pressure respectively.
关键词：electro discharge machining; surface modification; surface roughness and micro hardness
