填充焊丝对6061铝合金激光焊缝成形的影响

摘要

采用ER5356焊丝研究了光丝间距对焊丝进入熔池的熔滴过渡方式的影响,对比分析了送丝速度、焊丝成分对焊缝成形的影响规律.结果表明:不同范围内的光丝间距,导致焊接过程中的熔滴过渡方式不同;相对于颗粒过渡,表面张力过渡方式更有利于获得较好的焊缝成形;送丝速度对焊缝熔宽的影响不大,但对焊缝正面余高和背面下塌量的影响较为显著;相对于ER4043焊丝,ER5356焊丝更适于6061铝合金的激光填丝焊接.%In present work, the effects of distance between laser and wire on droplet transition of filler wire were studied by using ER5356 filler wire. Meanwhile, the effects of the wire feed speed and wire compositions on the weld appearance were also studied. The results show that the droplet transition of filler wire is different when the distance between laser and wire is in different range. Compared with granular transition of filler wire, the surface tension transition of filler wire is better to obtain good weld appearance. The effect of wire feed speed on weld width is slightly, while the effect of wire feed speed on weld reinforcement and collapse is obviously. The ER5356 filler wire is more suitable to be welded for 6061 aluminum alloy than the ER4043 filler wire.