Hardfacing of X2CrNiMoN22-5-3 Duplex stainless steel with Stellite alloy using pulsed TIG welding process

Abstract The results presented in this paper demonstrate the ability of the TIG welding process in the pulsed current to produce layers with good functional properties for the engineering surfaces. The Stellite-21 alloy was deposited on a duplex stainless steel substrate, X2CrNiMoN22-5–3, in a range of process parameters that allow control of linear energy and cooling rate. The optimum welding conditions led to the formation of a coating free of pores and cracks, with a good adhesion to the substrate. The morphology and performance of the deposited layers were studied by optical microscopy and hardness measurements.