2012•Journal of Dalian Jiaotong UniversityRequires access
Effect of Repair Welding on the Microstructure and Properties of Ferritic Stainless Steel T4003 Welded Joints
XU Hong-ji
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Abstract
Effect of repair welding on the microstructure and properties of ferritic stainless steel T4003 welded joints were studied through tensile,bending and impact tests,hardness examination and microstructure analysis.The results show that different repair times have little effect on the tensile,bending and impact properties.The microstructure of the ferritic stainless steel T4003 welding seam are austenite and δ-ferrite,and the microstructure of the HAZ are ferrite and martensite with coarse grains.The microstructure of the base material are massive ferrite with the grains extending along the rolling direction.Repair welding has little effect on the width of the coarse-grained zone,the grain size and the martensite content.The hardness of the ferritic stainless steel T4003 welding seam by different repair times are almost the same as the base material,and the hardness of the HAZ by different repair times is not changed distinctly.