双电极钛钙型焊条熔滴过渡及其影响因素

采用激光背光高速摄像系统对双电极钛钙型碳钢焊条的熔滴过渡及其影响因素进行了研究。结果表明，双电极钛钙型碳钢焊条具有细熔滴渣壁过渡、粗熔滴渣壁过渡、爆炸过渡和喷射过渡等多种熔滴过渡形式，其中细熔滴渣壁过渡占主导。双电极钛钙型碳钢焊条两芯间距、电弧电流及药皮重量系数的变化引起套筒形状发生相应变化，进而对熔滴的过渡行为产生影响。随两芯间距的减小、电弧电流的增大和药皮重量系数的增大，熔滴的过渡频率增大。

Metal transfer and its influence factor of lime titania type twin electrodes

Using a digital high-speed video analyzer and an arc shadow-graphing system based on a laser source and related optical system the phenomenon of metal transfer of lime titania type twin electrode is investi gated. It was shown that the mode of metal transfer consists of coarse and thin globular flux wall guided transfer, explosive transfer and spray trans fer, of which thin globular flux wall guided transfer dominates. The core span of twin electrode, the current of.electric arc and gravity coefficient of coating affect sleeve shape and then metal transfer behavior. The transi tion frequency increases with the decrease of core span of twin electrode. the increase of arc current and gravity coefficient of coating.