In this study, welding phenomena during submerged arc welding (SAW) were revealed with X-ray observation. In the experiment, the test coupon was placed between the X-ray source and high-speed camera. The area surrounding the arc was observed from an angle perpendicular to the welding direction vnat a frame rate is 3000 f s^–1. From the observation results, the droplet transfer, weld pool and molten flux (slag), which were previously unknown, were investigated. The droplet transfer mode is the spray transfer. With a high polarity ratio comparable to electrode negative (EN ratio), the transfer frequency decreases, but the droplet diameter increases, then changes to the globular transfer. The slag solidifies covering surface of the weld pool.

在这项研究中，通过X射线观察揭示了埋弧焊（SAW）期间的焊接现象。在实验中，将测试试样放在X射线源和高速相机之间。从垂直于焊接方向vnat的角度观察到电弧周围的区域，帧频为3000 f s ^–1。根据观察结果，对以前未知的熔滴转移，熔池和熔剂（熔渣）进行了研究。液滴转移模式是喷雾转移。在与电极负极（EN比）相当的高极性比率下，转移频率降低，但液滴直径增加，然后变为球状转移。炉渣使焊池的覆盖面固化。