Using 2205 duplex stainless steel

the common material for desulfurization recycle pump

as the welding base metal.Through welding process experiment

mechanical properties tests and corrosion behavior test

welding process for repair of abrasion damage in desulfurization recycle pump was developed.Results show that

the mixture of ferrite and austenite is the main microstructure of welding seam;the tensile and yield strength of welded joint is 795 MPa and 580 MPa

respectively;no cracks and corrosion pit are found on surface of the weld after bending and corrosion test.The in-field repaired impeller exhibits a profile line the same as a new one.