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

Jin Bingying; Wang Ning

doi:10.15980/j.tzzz.2022.11.013

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Resistance Spot Welding between Aluminum Alloy and Magnesium Alloy with Zinc Interlayer
Vol. 42, Issue 11, Pages: 1380-1384(2022)
Published： 2022 ，
DOI： 10.15980/j.tzzz.2022.11.013

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Jin Bingying, Wang Ning. Resistance Spot Welding between Aluminum Alloy and Magnesium Alloy with Zinc Interlayer. [J]. Special Casting & Nonferrous Alloys 42(11):1380-1384(2022)
DOI：

Jin Bingying, Wang Ning. Resistance Spot Welding between Aluminum Alloy and Magnesium Alloy with Zinc Interlayer. [J]. Special Casting & Nonferrous Alloys 42(11):1380-1384(2022) DOI： 10.15980/j.tzzz.2022.11.013.

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

层形成，靠近镁合金侧有10μm厚的Al

+(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。

Abstract

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

layer with thickness of 20 μm is formed near aluminum alloy side

and the Al

+（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.