Experimental investigation and process parameter optimization in cold metal transfer welding for SS304L using response surface method

Abstract Cold Metal Transfer (CMT) welding was used to join SS304L plates using SS308L MIG wire. The effects of current, the distance between nozzle and tip, welding speed on strength, hardness and surface roughness of welded zone in the CMT process using response surface methodology were investigated in the present study. The outcomes show that current is having a significant effect on the outputs. Also, current interacting with weld speed is showing its mark on the output variables like tensile strength, hardness and surface roughness. Finally, optimal results are found and the experimental values are in coincidence with the predicted values.