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ZnCl2和TiO2活性剂对镁合金TIG焊的影响

Effect of ZnCl2 and TiO2 flux on TIG welding of magnesium alloys

    摘要
  • 摘要: 进行了单侧涂敷活性剂和两侧涂敷活性剂焊接镁合金的研究,分析了不同活性剂对焊缝及电弧的影响。结果表明,在单侧涂覆活性剂和两侧涂敷活性剂试验中,ZnCl2活性剂增加熔深的效果均优于TiO2活性剂。涂敷同样的活性剂,熔深增加的效果随着涂敷活性剂偏移量或间隙量的增大而减小。在单侧涂敷活性剂试验中,ZnCl2活性剂对熔池的偏移作用更明显。热稳定性差的ZnCl2活性剂改变电弧导电通道,使电弧形态发生明显改变。而热稳定性好的TiO2活性剂没有改变电弧导电通道,其电弧形态未发生明显改变。

     

    Abstract: In order to analyze the effect of activating fluxes on the weld bead and the arc shape, activating flux tungsten inert gas (TIG)welding of magnesium alloy has been studied by using single side coated flux and bounded coated flux.It has been found that, the weld penetration with ZnCl2 flux was much deeper than that with TiO2 flux in both single side coated flux and bounded coated flux TIG welding.For both ZnCl2 and TiO2 flux, the weld penetration decreased with the increasing flux gap.In the single side coated flux TIG welding, the deflection effect of ZnCl2 flux on molten pool was greater than the one of TiO2 flux.ZnCl2 flux with low thermal stability changed current channel conductive of the arc, so the arc shape was changed significantly.TiO2 flux with high thermal stability could not change the current channel conductive of the arc, so the arc shape was not changed significantly.

     

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