摘要
采用普通TIG电弧作为焊接热源,对镁铝异种金属进行填加锌丝的对接焊试验.并利用金相显微镜、电子探针(EPMA)、万能力学性能拉伸机等现代分析手段对所得到的接头进行测试分析.结果表明,采用这种工艺得到了锌基的合金化焊缝,实现了6061铝合金和AZ31B镁合金的连接,焊缝主要由MgZn2和少量的铝、锌的固溶体构成,焊缝和铝合金母材之间不存在明显的过渡层,和镁合金母材之间有厚约20～100μm的过渡层.焊缝的硬度高于6061铝合金和AZ31B镁合金母材.对接接头的抗拉强度达到75 MPa.
Butt welding experiments of Mg to Al alloy filling with Zn wire were carried out by tungsten inert gas(TIG) welding.The welding joints were investigated and tested by metallography microscope,electronic probe micro-analyzer(EPMA),universal mechanical properties testing machine.The results indicated that the aluminum alloy 6061 and the magnesium alloy AZ31B was jointed with a good surface forming.The welded joints are mainly composed of MgZn2,the zinc base solid solution and the aluminum base solid solution,there are not the obvious transitional layer between welded seam and aluminum base metal and the transitional layers which approximately 20-100 μm between welded seam and magnesium base metal.The hardness of the weld seam is higher than that of the base metal aluminium alloy 6061 and magnesium alloy AZ31B.The tensile strength of the butt joint is 75 MPa.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2011年第10期49-52,115,共4页
Transactions of The China Welding Institution
基金
中央高校基本科研业务费资助项目(DUT10ZD108)
辽宁省博士启动基金资助项目(20091010)
关键词
镁铝异种金属
填锌丝对接焊
微观组织
力学性能
TIG
distributable metal of Mg and Al
butt welding filling with zinc wire
microstructures
mechanical properties
TIG
