本文介绍了焊接热源随电弧移动,其温度分布因瞬间热源形态不同而有所差异。对于快速焊接的薄板,热源后方温度分布可以近似为瞬间面热源;而对于厚板而言,当焊接速度非常快时,热源后方温度可以近似为瞬间线热源。通过分析计算,从而可以得到板厚对瞬间热源的影响。 This article describes the welding heat source moves with the arc, the temperature distribution due to the instantaneous heat source morphology varies. For a rapidly welded sheet, the temperature distribution behind the heat source can be approximated as an instantaneous surface heat source, whereas for slabs the temperature behind the heat source can be approximated as an instantaneous source of heat when the welding speed is very fast. Through the analysis and calculation, which can get the impact of plate heat on the instant heat.