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采用正交试验法研究焊接热循环对应用于船舶铝质上层建筑与钢质船体连接的铝合金-铝-钢复合过渡接头性能的影响.试样依次采用铝合金TIG焊、MIG焊、钢MAG焊分别实现过渡接头与铝合金板材和钢板之间的焊接.复合界面剪切强度及厚度方向的抗拉强度测试结果表明:随着焊接电流的增大,过渡接头的性能明显下降,三种工艺方法对复合板性能由主到次的影响顺序为:铝合金TIG焊>钢MAG焊>铝合金MIG焊.通过复合界面焊接温度场的测定,分析了复合界面峰值温度与复合板性能之间的关系,结果显示:为满足船舶结构设计的要求,焊接热循环在铝-铝-钢过渡接头复合界面上产生的峰值温度不宜超过300℃.
The influence of welding heat cycle on the performance of the aluminum alloy-aluminum-steel composite transitional joint used in the connection between shipbuilding aluminum superstructure and steel hull was studied by orthogonal test method.The samples were sequentially processed by TIG welding of aluminum alloy, MIG welding, steel MAG The results show that with the increase of welding current, the performance of the transition joint obviously decreases, and the three kinds of technology The order of the influence of the method on the performance of the composite board is: TIG welding of aluminum alloy> MAG welding of MAG> MIG welding of aluminum alloy. By measuring the welding temperature field of composite interface, the relationship between the peak temperature of composite interface and the performance of composite board The results show that in order to meet the requirements of ship structural design, the peak temperature of the welding thermal cycle at the composite interface of the aluminum - aluminum - steel transition joint should not exceed 300 ℃.