Effects of post-weld heat treatment on dissimilar metal joint between aluminum alloy and stainless steel-猫眼课题宝

焊后热处理对铝合金与不锈钢异种金属接头的影响

DOI：

10.1016/j.msea.2012.04.110

发表时间：

2012-07

期刊：

Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing

影响因子：

6.4

通讯作者：

中科院分区：

材料科学1区

文献类型：

作者：

Dong, Honggang;Liao, Chuanqing;Yang, Liqun;Dong, Chuang

采用 Zn-15%Al 药芯焊丝钨极气体保护焊对 5A02 铝合金与 304 不锈钢板进行搭接连接，研究焊后热处理温度和持续时间对接头组织和力学性能的影响。实验结果表明，焊缝中富锌相的浓度和尺寸，尤其是沿焊缝/钢材界面的富锌相，随着温度和持续时间的不同而变化，从而影响接头强度。焊缝中均匀分布的细小富锌相，提高了接头强度；然而，沿界面层的粗大富锌相会降低界面层的结合强度。还检查了拉伸试验后样品的断裂表面。

Lap joining of 5A02 aluminum alloy to 304 stainless steel sheets was conducted by gas tungsten arc welding with Zn–15%Al flux-cored filler wire, and the effects of the temperature and duration time during post-weld heat treatment on the microstructure and mechanical properties of the resultant joints were investigated. The experimental results show that the concentration and size of the Zn-rich phases in the weld, especially along the weld/steel interface, changed with different temperature and duration time, and consequently affected the joint strength. The fine Zn-rich phases uniformly distributed in the weld could enhance the joint strength; however, the coarse Zn-rich phases along the interfacial layer would degrade the bonding strength of the interfacial layer. The fractured surfaces of the specimens after tensile testing were also examined.