Weldability of high nitrogen steels: A review

Abstract High nitrogen steel (HNS) have been widely used in many industrial fields place of stainless steels. As we know, the welding is main fabricating method HNS structural components. In this article, recent investigations joining methods HNS, such as tungsten inert gas welding, melt inert-gas laser laser-arc hybrid friction stir (FSW), and brazing are summarized. First, effect content shielding gas, wire, base metal on evolution microstructure, mechanical properties, corrosion susceptibility fusion welded joints discussed systemically. Then existing problem during FSW process analyzed. Additionally, key issues future trends proposed. The purpose review to provide a technical reference theoretical basis for research technological development HNS.