TIG焊和PAW焊中活性剂对焊缝熔深的影响

针对常规TIG焊生产效率低、熔深小等问题，研究了TIG焊和PAW焊中应用活性剂对焊缝熔深的影响。结果表明，应用活性剂后，在同样的参数下，同传统TIG相比，活性剂能够大幅度提高不锈钢、铝合金和钛合金的焊缝熔深。对于PAW焊，熔深也有增加，但是增加的幅度不如TIG效果明显，但对焊缝成形有很好的改善。同时，活性剂对铝合金焊接背面能够起到保护作用。对于钛合金，活性剂除了增加焊缝的熔深外，还能够大幅度地消减焊缝产生的气孔。

EFFECT OF ACTIVATING FLUX ON WELD DEPTH OF PENETRATION DURING TIG AND PLASMA ARC WELDING

Traditional TIG welding is known as its low productivity and small weld depth of penetration. The effect of the activating flux on weld depth of penetration during TIG welding and plasma arc welding is investigated in this paper. The results show that in comparison with the traditional TIG welding with same welding specification, the weld penetration is greatly increased after applying the activating flux on stainless steel, aluminum alloy and titanium alloy. However, it is not obvious in penetration increase for PAW through using of flux compared with TIG welding, but significant improvement in weld shape has been found in PAW. At the same time, the activating flux plays significant role on weld back protection in TIG welding of aluminum alloy. In addition to increasing the weld penetration for titanium alloy, the porosities can be reduced or eliminated by applying the activating flux.