Experimental study on dissimilar TIG welding-brazing of 5A06 aluminum alloy to SUS321 stainless steel  

作　　者：林三宝 宋建岭 杨春利 范成磊 张东卫 

机构地区：[1]State Key Laboratory of Advanced Welding ProductionTechnology, Harbin Institute of Technology, Harbin, 150001.

出　　处：《China Welding》2010年第1期26-31,共6页中国焊接（英文版）

基　　金：Supported by National Natural Science Foundation of China （50874033）.

摘　　要：Dissimilar metals TIG welding-brazing of 5A06 aluminum alloy to SUS321 stainless steel has been carried out with Al-Sil2 eutectic filler metal and modified non-corrosive flux. The surface appearance and microstructures of the joint were analyzed and the average tensile strength of the joint was estimated. The results show that a sound dissimilar metals joint is obtained by TIG welding-brazing. Slag and residual flux on steel surface can be removed by sanding easily. The joint has dual characteristics： in aluminum alloy side, it is a welded joint, while in stainless steel side, it is a brazed joint. The whole interface layer, unequal in thickness at different position, ranges from 5 μm to 25 μm. The average tensile strength of the butt joint reaches 120 MPa and the fracture occurs at the interface layer.Dissimilar metals TIG welding-brazing of 5A06 aluminum alloy to SUS321 stainless steel has been carried out with Al-Sil2 eutectic filler metal and modified non-corrosive flux. The surface appearance and microstructures of the joint were analyzed and the average tensile strength of the joint was estimated. The results show that a sound dissimilar metals joint is obtained by TIG welding-brazing. Slag and residual flux on steel surface can be removed by sanding easily. The joint has dual characteristics： in aluminum alloy side, it is a welded joint, while in stainless steel side, it is a brazed joint. The whole interface layer, unequal in thickness at different position, ranges from 5 μm to 25 μm. The average tensile strength of the butt joint reaches 120 MPa and the fracture occurs at the interface layer.

关 键 词：TIG welding-brazing aluminum alloy stainless steel microstructure tensile strength 

分 类 号：TG339[金属学及工艺—金属压力加工] TG113.231