The effects of solid solution treatment on microstructure and stress corrosion of the dual stainless steel were studied. The results show that the microstructure of the duplex stainless steel after the solid solution is mainly black ferrite and the lath-shaped and island-shaped austenite. With the increase of the solid solution time(solution at 1120 ℃), the content of ferrite in the dual stainless steel increases and the content of the austenite decreases. With the increase of solid solution temperature(sol...