Parametric Modeling for Wire Electrical Discharge Machining of M42 HSS using Untreated and Cryogenated Treated Brass Wire by using Response Surface Methodology
M42 super high speed steel is a finest cobalt high speed steel with a chemical composition intended for high hardness and better hot hardness. In the present work, the effect of shallow cryogenated brass wire on the M42 HSS is compared with the results of untreated wire on M42. The empirical modeling of process parameters of the WEDM has been carried out for the M42 HSS using a well known experimental design approach called response surface methodology(RSM). The parameters such as pulse-on, pulse-off, spark gap voltage and wire feed have been selected as input variables keeping others constant. The performance has been measured in terms of cutting speed(CS). There is increase in cutting speed value when we treat the M42 with cryogenated treated wire than the untreated wire.
Keywords - HSS, RSM, SEM, WEDM