Effect of Shielding Gas and Filler Metal to Microstructure of Dissimilar Welded Joint Between Austenitic Stainless Steel and Low Carbon Steel

International Conference on Design and Application of Engineering Materials in conjunction with Seminar Nasional Metalurgi dan Material XI (SENAMM)

材料科学;金属学

Purnama, Dewin^1 ; Oktadinata, Herry^2

Department of Mechanical Engineering, Politeknik Negeri Jakarta, Depok, Indonesia^1

Department of Mechanical Engineering, Universitas Jenderal Achmad Yani, Bandung, Indonesia^2

关键词: 304 stainless steel;    Chemical compositions;    Dissimilar metal weld;    Flux-cored wire;    Mechanical and thermal properties;    Shielding gas;    Shielding gas mixtures;    Type 304 stainless steel;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/547/1/012003/pdf
DOI  :  10.1088/1757-899X/547/1/012003

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Welding of dissimilar metals involves different types of metals which have different chemical composition, mechanical and thermal properties. This paper presents a study on dissimilar metal weld between type 304 stainless steel and SS400 carbon steel. The steel plates were welded by using different filler metals (solid wire, flux-cored wire) and different shielding gases (100%CO2, 90%Ar+10%CO2). Then the weldments were observed by optical microscope, scanning electron microscope and EDX analysis. It seems that the weldments which were welded by using 100%CO2 shielding gas have significant amount of inclusions in weld metal compared to 90%Ar+10%CO2 shielding gas mixture. The EDX analysis shown the inclusions are oxides which consist of some elements (C, Si, Cr, Mn) with O. The weldment which was welded by using 90%Ar+10%CO2 shielding gas mixture and solid wire has much less inclusions in weld metal.