"NVESTIGATION OF MACHINABILITY OF WELDED JOINTED HARDOX STEEL IN WEDM"

Abstract

Abstract:In this study machinibility of hardox steel plates (welded by plasma and Mag welding) was examined in WEDM. Twodifferent ampere values and two different feed rates were determined for the two different welding types. Depending on thesefactors ,micro structures, micro hardnesses and resistivity/conductivity values (varying according to heat output) wereobtained at the HAZ and WM zones. Then, each of the samples taken from both HAZ and WM zones were cut in theWEDM by using 2 levelled four different parameters. The purpose at this stage is to examine the cutting width (kerf) andsurface roughness (Ra) values at the HAZ and WM zones with respect to varying micro structure, micro hardness andconductivity values. At the end of the study, the lowest kerf was obtained with the plasma welded samples whereas thelowest Ra values were obtained with the Mag welded samples . The samples at WM zone are in general are the ones weldedby high conductivity sample Mag welding. Whereas in the HAZ zone the samples are the ones welded by high conductivityplasma welding.