Optimization effect of parameter on surface quality of stainless steel

Abstract

The purpose of this project are to optimize process variables of WEDM to obtain minimum surface roughness and crater size. This research is to get the best cutting parameter for tensile testing where the quality on tensile sample more critical factor to consider. This research is started with collecting the information from literature review regarding stainless steel (SKD11) Wire electrical discharge machining (WEDM) and design of experiment (DOE). Then, the parameters will be selected based on the experiment. The material used in this project is stainless steel (1.5C-12Cr-Mo-0.35V). Parameter used in this research is Electrolysis Free, Time ON, Time OFF, Flushing Rate, Peak Current, Voltage, Wire Pressure and Wire Speed has been study. Design of Experiment (DOE) was utilized to find the best combination of the parameters setting to achieve the minimum surface roughness and crater size. Based on the result of analysis by using DOE software, the confirmation tests have been done. After the confirmation process done, we are able to see the percentage of error on the predicted value using DOE software and the confirmation actual value. The results on surface roughness the crater size have been discussed.