焊接温度对热镀锌钢/铝合金压力焊接头组织和拉伸性能的影响  

Effects of Welding Temperature on Microstructure and Tensile Properties of Pressure Welded Joint between Hot Dip Galvanized Steel and Aluminum Alloy

作　　者：余本红 林健[1] 白海林[2] 雷永平[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]清华大学机械工程系,北京100084

出　　处：《机械工程材料》2016年第9期58-61,共4页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(51005004);北京市自然科学基金资助项目(3132006);北京市教委科研项目(面上)(KM2012100050010)

摘　　要：使用热模拟试验机对热镀锌钢板和6061铝合金板的压力焊接试验进行模拟,研究了焊接温度（390~490℃）对接头组织和拉伸性能的影响,分析了不同焊接温度下接头界面层的微区成分。结果表明：随着焊接温度升高,界面层中的铝锌二元化合物逐渐减少,铁铝金属间化合物逐渐生成,接头的剪切力先减小后增大;当焊接温度为390℃时,界面层主要由铝锌二元化合物组成,接头的剪切力最大,为6.45kN;当焊接温度为430℃时,接头的剪切力最小,为4.39kN;焊接温度超过430℃后,界面层中的铝锌二元化合物完全消失,主要为铁铝金属间化合物,接头的剪切力又开始增大。The pressure welding of hot dip galvanized steel sheet and 6061 aluminum sheet was simulated by using thermal simulation machine.The effects of welding temperature（390-490 ℃）on microstructure and tensile properties of the joint were researched;And the composition of interface layer at different welding temperature was analyzed.The results show that the Al-Zn binary compound gradually decreased and Fe-Al intermetallic compound gradually generated in the interface layer and shear force of the joint first decreased and then increased with the increase of welding temperature.When welding temperature was 390 ℃,the interface layer consisted of Al-Zn binary compound,and the joint owned the maximum shear force of 6.45 kN.The shear force decreased to the minimum value which was 4.39 kN at the welding temperature of 430℃.When the temperature was above 430℃,Al-Zn binary compound in the interface layer disappeared completely,the interface layer was mainly composed of Fe-Al intermetallic compounds,and the shear force of the joint increased again.

关 键 词：热模拟 钢/铝合金接头 金属间化合物 剪切力 

分 类 号：TG47[金属学及工艺—焊接]