Research Status on Weldability of Duplex Stainless Steeland Corrosion Resistance of Joint

Dual-phase stainless steel has been widely used because of its good mechanical properties and corrosion resistance, and its weldability has also become an important research object. The welding method and microstructure of the welded joint of duplex stainless steel are introduced, and pitting corrosion, stress corrosion, intergranular corrosion and the generation mechanism of embrittlement and cracks of the welded joint are discussed. Finally, the research direction of duplex stainless steel weldability is prospected.