1420铝锂合金激光焊接气孔抑制技术

Porosity prevention of 1420 Al-Li alloy for laser welding

摘要: 分别采用气体和固体两种类型、三台激光器对1420铝锂合金消除气孔的焊接工艺进行了试验研究。结果表明,1420铝合金表面氧化膜对产生气孔有很大影响,化学清理可以获得气孔较少的焊缝。保护气体种类、气体流量、焊接速度对1420铝锂合金气孔都有影响。适宜的双激光束焊接工艺可以获得成形美观且无气孔的优质1420铝锂合金焊缝,是1420铝锂合金焊接较为理想的焊接工艺。

Abstract: Experimental study was carried out with three laser devices of two type of laser device.The results show that the oxide of on the 1420 Al-Li alloy surface will make for pores in the process of laser welding, and the pores can be decreased by chemic cleaning to the surface.The numbers of pores have something to do with the sort of gas, the shielding gas flux, and the welding speed.As last, 1420 Al-Li alloy weld without porosity and with good appearance was oblained by adopting dual laser beams welding.