高速MAG电弧焊驼峰焊道产生过程的实验研究

开展了高速活性气体保护（MAG）电弧焊接工艺实验，确定出了不同焊接电流条件下形成驼峰焊道时的临界焊接速度、相邻驼峰之间的距离以及同一驼峰焊道“波峰”和“谷底”的断面形貌．基于高速MAG电弧焊熔池的视觉检测图像，分析了驼峰焊道的产生机理，并利用上坡焊和下坡焊实验进行了验证．同时，也分析了保护气体成分对高速MAG电弧焊焊缝成形的影响．

EXPERIMENTAL INVESTIGATION ON FORMING PROCESS OF HUMPING BEAD IN HIGH SPEEDMAG ARC WELDING

High-speed metal-active gas(MAG)arc welding experiments were conducted to determine the critical welding speeds at which humping defects occur,the spacing between two adjacent humps along the welding direction,and the cross-section morphologies of the hump and the valley in a humping bead.Based on the weld pool images sensed during high-speed MAG welding process,the forming mechanism of humping bead is analyzed and verified through up-hill and down-hill welding experiments.Meanwhile,the effect of the compos...