Abstract A self-designed external compound magnetic field assisted gas metal arc welding process was developed to suppress the weld bead defects in high-speed welding. A comprehensive numerical model containing the arc and filler metal was proposed to investigate the influence of the external compound magnetic field on the arc and droplet behaviors. The external magnetic field caused the arc and filler metal to incline forward continuously along the welding direction as well as swinging periodically perpendicular to the welding direction. And the external magnetic field increased the metal transfer frequency and decreased the size of the droplet. The external electromagnetic force caused the inclination of the arc and then the arc inclination changed the arc plasma force acting on filler metal. The change of arc plasma force has greater influence on the droplet inclination and metal transfer frequency than the external electromagnetic force.

中文翻译：

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外部复合磁场气体保护焊电弧和熔滴行为的数值分析

摘要 为抑制高速焊接中的焊道缺陷，开发了一种自行设计的外部复合磁场辅助气体保护金属弧焊工艺。提出了一个包含电弧和填充金属的综合数值模型来研究外部复合磁场对电弧和熔滴行为的影响。外部磁场使电弧和填充金属沿焊接方向连续向前倾斜，并垂直于焊接方向周期性摆动。并且外部磁场增加了金属转移频率并减小了液滴的尺寸。外部电磁力引起电弧倾斜，然后电弧倾斜改变了作用在填充金属上的电弧等离子体力。