摘要
分别采用ER4047和ER5183焊丝对T6态的Al-13.0Si-0.7Mg合金进行平板对接试验,为了降低热输入的影响,使用双脉冲MIG双面焊成形工艺,确定了两种焊丝对应的焊接工艺参数并且获得了良好的焊缝成形.鱼骨状热裂纹试验说明该种合金及两种焊丝对该合金的抗热裂性能良好.在此基础之上,对焊接接头进行金相组织观察和力学性能测试.结果表明,两种焊丝对应的焊接接头显微组织的差别较大;拉伸试验表明两种焊丝的接头强度为母材的70%左右,显微硬度测试结果表明焊缝热影响区存在软化现象.
Experiment of flat butt-welding is conducted on the Al-13. 0Si-0. 7Mg alloy on T6 state with two kinds of welding wire,ER4047 and ER5183. The process of double pulse MIG welding by both sides is used to reduce the influence of welding heat input on the base metal. The welding parameters of two welding wires are confirmed and the good weld formations are obtained. The alloy and the two wires to this alloy have good heat cracking resistance as fish-bone cracking test shows. On this basis,the microstructure observation and mechanics performance testing are conducted on the welding joints. The results show that the microstructure of joints is different for these two wires. The tensile strength of the welded joints is about 70% of the one of base metal. The hardness test indicates that there is softening phenomenon in the heat-affected zone.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2014年第10期105-108,118,共5页
Transactions of The China Welding Institution
