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

Abstract

Cold Metal Transfer welding (CMT) was used to join SS304L plates by means of SS308L MIG wire. The effects of current, distance between nozzle and tip, welding speed on strength, hardness and surface roughness of welded zone in the CMT process by means of response surface methodology were studied in this work. The outcomes show that Current is having significant effect on the outputs. Also current interacting with weld speed is showing it’s 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.