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T2/Al 1060CMT焊接接头组织及性能研究

Peiyuan LIU,Xiaojuan WU,Fanling MENG

Transactions of Shenyang Ligong University（2015）

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Abstract
采用冷金属过渡焊(CMT)技术对T2和Al 1060异种金属的焊接工艺进行研究.实验选用S301焊丝采用搭接方式在不同焊接规范下得到焊接接头,对接头物相及形貌进行观察和测试,研究焊接热输入对焊缝组织、力学性能及断裂特征的影响,测试焊缝的力学性能,讨论影响焊缝金属间化合物厚度的因素.结果表明:焊接接头处生成一层致密的金属间化合物,主要成分为CuAl2 Cu3 Al2、CuAl和铜在铝中的固溶体;随着焊接热输入的减小,金属间化合物层厚度不断减小,但焊接热输入过小时,焊缝润湿性差;焊接接头拉伸实验断口在接头处为脆性断裂;焊缝处维氏硬度高于两侧母材.
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Key words
dissimilar metal between T2 and Al 1060,CMT,microstructure characteristics and mechanical properties
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