Abstract Gap-paste is used to create gaps, for zinc vapor release, between the zinc coated steel sheets during the arc welding process. In-depth morphology analysis of the gap after the welding is presented which shows zinc oxide formation patterns are consistent with zinc vapor release through the formed gaps. Porosity analysis for four different mask configuration shows that the porosity of the sample, with 120 μm gaps created by the paste, is reduced from ∼15% to a near zero value. The tensile shear stress test reveals that the strength of the welded samples increased by ∼30% compared to that of the samples with no gaps. High-speed camera images are also presented showing the changes in the zinc vapor release mechanism when the paste is applied, and the various stages of zinc vapor release during the welding process are discussed.

中文翻译：

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通过钛颗粒基间隙焊膏在镀锌钢电弧焊中降低孔隙率

摘要 间隙焊膏用于在弧焊过程中在镀锌钢板之间形成间隙，以释放锌蒸气。焊接后间隙的深入形态分析显示，氧化锌的形成模式与通过形成的间隙释放的锌蒸气一致。四种不同掩膜配置的孔隙率分析表明，由浆料产生 120 μm 间隙的样品的孔隙率从约 15% 降低到接近零的值。拉伸剪切应力测试表明，与没有间隙的样品相比，焊接样品的强度提高了约 30%。还提供了高速摄像机图像，显示了涂抹焊膏时锌蒸气释放机制的变化，并讨论了焊接过程中锌蒸气释放的各个阶段。