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2009•Journal of Dalian Jiaotong UniversityRequires access

Microstructure and Mechanical Properties of 1.4003 Ferritic Stainless Steel Welded Joints

Jiao Jianqiang

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Abstract

Microstructures and properties of 1.4003 ferritic stainless steel welded joints are investigated by room-temperature tensile test,impact test,Vickers hardness test and metallographic analyse.The results show that the joints by means of MAG has good tensile strength which is higher than base metal and good bend properties.HAZ on 1.4003 side has bad impact properties which will be sharply reduced with the temperature dropped.Near Fusion line the hardness has fluctuation.Hardness of overheating area is not decreased significantly.The microstructure of the welded seam is mainly austenitic organization consisting of duplex ferrite and austenitic.HAZ overheating area has unity coarsening ferritic grain,which caused toughness decline.The Organization of base metal is ferrite.

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Microstructures and properties of 1.4003 ferritic stainless steel welded joints are investigated by room-temperature tensile test,impact test,Vickers hardness test and metallographic analyse.The results show that the joints by means of MAG has good tensile strength which is higher than base metal and good bend properties.HAZ on 1.4003 side has bad impact properties which will be sharply reduced with the temperature dropped.Near Fusion line the hardness has fluctuation.Hardness of overheating area is not decreased significantly.The microstructure of the welded seam is mainly austenitic organization consisting of duplex ferrite and austenitic.HAZ overheating area has unity coarsening ferritic grain,which caused toughness decline.The Organization of base metal is ferrite.

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Available abstract

Microstructures and properties of 1.4003 ferritic stainless steel welded joints are investigated by room-temperature tensile test,impact test,Vickers hardness test and metallographic analyse.The results show that the joints by means of MAG has good tensile strength which is higher than base metal and good bend properties.HAZ on 1.4003 side has bad impact properties which will be sharply reduced with the temperature dropped.Near Fusion line the hardness has fluctuation.Hardness of overheating area is not decreased significantly.The microstructure of the welded seam is mainly austenitic organization consisting of duplex ferrite and austenitic.HAZ overheating area has unity coarsening ferritic grain,which caused toughness decline.The Organization of base metal is ferrite.

Key concepts: Materials science, Microstructure, Welding, Metallurgy, Overheating (electricity), Vickers hardness test, Austenite, Base metal

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