Comparative Study of Hardfacing of AISI 1020 Steel by Gas Welding and Tig Welding Processes

Abstract

Weld hardfacing techniques are employed mainly to extend or improve the service life of engineering components either by rebuilding or by fabricating in such a way as to produce a metallic/alloy wall section to combat wear, erosion, corrosion, etc. In this paper, an attempt has been made to determine the better welding process to hardface AISI 1020 steel based on wear study. Two different welding processes - Gas Welding and Tungsten Inert Gas Welding (TIG) have been compared. Based on the study, the specimens prepared using TIG welding process yielded better wear properties compared to the specimens’ prepared using Gas Welding process till 1.256 m/s sliding velocity. The Gas Welding process yielded better wear properties for sliding velocities above 1.571 m/s. An attempt was made to interpret the factors contributing to achieve the said results.