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首页> 外文期刊>Applied Sciences >Application of Pulsed Laser-TIG Hybrid Heat Source in Root Welding of Thick Plate Titanium Alloys
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Application of Pulsed Laser-TIG Hybrid Heat Source in Root Welding of Thick Plate Titanium Alloys

机译：脉冲激光-TIG复合热源在厚板钛合金根焊中的应用

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Laser-TIG (tungsten inert gas) hybrid welding process is applied to produce stable back beads in the first layer during one-side multilayer welding. To explain why stable back beads can be formed, a comparison is conducted between single TIG and laser-TIG hybrid welding. Results indicate that during laser action the arc column is enhanced and deflected to the keyhole, which changes the spatial distribution of plasma by strong attraction. The keyhole plasma possesses extreme electric conductivity. After laser action, the enhanced arc is restituted, the low energy density arc acts on the molten pool, and the bottom of the molten pool is solidified to prevent its collapse. The heat and force are redistributed over the top of molten pool under the alternative action of the enhanced arc and original arc. In this case the thermal distribution and mechanical situation in the molten pool must be more balanced and reasonable, and the back bead appearance is continuous, stable and uniform. This process gives high quality and efficient root welding of the thick plate.
机译：在单面多层焊接过程中，采用Laser-TIG（钨极惰性气体）混合焊接工艺在第一层中产生稳定的背面焊道。为了解释为什么可以形成稳定的背面焊道，我们在单个TIG和激光-TIG混合焊接之间进行了比较。结果表明，在激光作用期间，电弧柱会增强并偏转到锁孔中，从而通过强烈的吸引力改变了等离子体的空间分布。锁孔等离子体具有极高的导电性。在激光作用之后，增强的电弧恢复原状，低能量密度的电弧作用在熔池上，并且熔池的底部固化以防止其坍塌。在增强电弧和原始电弧的交替作用下，热量和力重新分配到熔池的顶部。在这种情况下，熔池中的热分布和机械状况必须更加平衡和合理，并且后部珠粒外观应连续，稳定且均匀。此过程可对厚板进行高质量，高效率的根部焊接。

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