A Review on Arc Welding of Super Duplex Stainless Steel (SDSS) 2507

Abstract

Super Duplex Stainless Steels (SDSS) are playing an important role in mechanical, marine, gas industries and power plant. Welding is an important joining process involved in the construction of industrial structures. Selection of the welding method is a difficult task because the imbalance of austenite / ferrite ratio results in solidification cracking, reduce corrosion resistance and reduced ductility. Arc welding process like GTAW, GMAW and PAW are available to join the SDSS economically. The primary objective of this paper is to compare various arc welding processes and its welding parameters (welding speed, welding current, welding voltage etc.) for the joints of a thin sheet of SDSS 2507. Effects of SDSS alloying elements (Cr, Mo, Ni and N) on intermetallic phases is also discussed. This study can help to find out the best arc welding process and their welding parameter on phase balance to join the SDSS 2507.