以锌为中间层铝合金与镁合金的电阻点焊  

Resistance Spot Welding between Aluminum Alloy and Magnesium Alloy with Zinc Interlayer

作　　者：晋兵营[1] 王宁 Jin Bingying;Wang Ning(Institute of Mechanical&Electrical Engineering,Zhengzhou Railway Vocational&.Technical College;School of Materials Science and Engineering,Henan University of Science and Technology)

机构地区：[1]郑州铁路职业技术学院机电工程学院,郑州451460 [2]河南科技大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2022年第11期1380-1384,共5页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51875177)。

摘　　要：以60μm厚的锌片作为中间层对铝合金A6061与镁合金AZ31B进行电阻点焊,利用扫描电镜等对接头熔核区的微观组织进行观察分析,研究了焊接参数对A6061/Zn/AZ31B接头熔核大小和接头抗剪载荷的影响。结果表明,熔核靠近铝合金侧有厚度约为20μm的Al_(12)Mg_(17)层形成,靠近镁合金侧有10μm厚的Al_(12)Mg_(17)+(α-Mg)共晶层形成。随着焊接电流、时间及电极压力增大,A6061/Zn/AZ31B接头的抗剪载荷呈先增大后下降的趋势,最大抗剪力约为3.8 kN。A6061 aluminum alloy and AZ31 B magnesium alloy were welded by resistance spot welding with a zinc interlayerof 60 μm thickness. The microstructure of the nugget zone was observed and analyzed by scanning electron microscopy. The effects of welding parameters on the nugget size and tensile shear load of the joint were investigated. The results indicate that Al_(12)Mg_(17) layer with thickness of 20 μm is formed near aluminum alloy side, and the Al_(12)Mg_(17)+(Mg) layer with thickness of 10 μm is formed near magnesium alloy side of the joint. The tensile shear load and nugget diameter of A6061/Zn/AZ31 B joint are increased at first and then decreased with the increase of welding current, welding time and electrode force, and the maximum tensile shear load is 3.8 kN.

关 键 词：铝合金 镁合金 电阻点焊 

分 类 号：TG441.8[金属学及工艺—焊接] TG146.21[一般工业技术—材料科学与工程] TG146.22[金属学及工艺—金属材料]