Effect of different pulse frequency on the microstructure of A6N01 aluminum alloy welded joint

ZHANG Xiangjun; CHEN Ganghui; DING Zhicheng

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Effect of different pulse frequency on the microstructure of A6N01 aluminum alloy welded joint
Vol. 48, Issue 3, Pages: 139-144(2018)
Published：2018
DOI：
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DOI：

ZHANG Xiangjun, CHEN Ganghui, DING Zhicheng. Effect of different pulse frequency on the microstructure of A6N01 aluminum alloy welded joint[J]. Eletric Welding Machine2018, 48(3): 139-144. DOI：

摘要

研究不同脉冲频率对A6N01铝合金焊接接头焊缝成形、微观组织的影响。结果表明

不同的脉冲频率对焊缝成形、缺陷无明显影响;不同脉冲频率焊接接头的焊缝微观组织均为典型树枝状晶组成的铸态组织

熔合区靠近焊缝一侧为柱状晶组织

靠近基体一侧为等轴晶组织

热影响区部分晶粒较母材晶粒粗大;母材为典型的再结晶组织。可以考虑选择不同的脉冲频率进行焊接。

Abstract

The influence of different pulse frequency on the weld formation and microstructure of A6 N01 aluminum alloy welded joint is studied. The results show that the different pulse frequencies have no obvious influence on the formation and defects of the weld.The microstructure of weld joints with different pulse frequency is typical dendritic structure. The fusion zone is columnar structure near the weld side

and the other side is equiaxed crystal near the base. The grain size of heat affected zone is larger than that of parent metal. The parent material is a typical recrystallized tissue. It can be considered to choose different pulse frequencies for welding.