Experimental methods measuring arc efficiency of gas tungsten arc welding (GTAW) to a base metal are compared in order to understand heat transfer of GTAW with and without motion of welding torch. Taking the effect of heat loss into account, arc efficiency measurements of GTAW moving at constant velocity are conducted. From a perspective of thermal conduction in a base metal, it is suggested that the temperature gradient inside the base metal affects arc efficiency and that arc efficiency measured by water-cooling copper anode also depends on thermal conduction inside the anode.

中文翻译：

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钨极气体保护焊电弧效率测量方法的比较

比较测量钨极气体保护焊 (GTAW) 与母材的电弧效率的实验方法，以了解 GTAW 在焊炬运动和不运动的情况下的热传递。考虑到热损失的影响，对以恒定速度移动的 GTAW 进行电弧效率测量。从母材热传导的角度来看，母材内部的温度梯度会影响电弧效率，而水冷铜阳极测量的电弧效率也取决于阳极内部的热传导。