自保护药芯焊丝弧桥并存过渡试验分析  

Experimental analysis of bridging transfer without arc interruption of self-shielded flux cored wire

作　　者：王志明[1] 刘海云[1] 王勇[1] 张英乔[2] 

机构地区：[1]太原理工大学,山西太原030024 [2]中北大学,山西太原030051

出　　处：《电焊机》2011年第7期85-89,共5页Electric Welding Machine

摘　　要：采用高速摄影、汉诺威弧焊质量分析仪和体式显微镜对自保护药芯焊丝弧桥并存过渡特征和过渡机理进行了试验研究,结果表明:弧桥并存过渡是一种液桥持续存在的同时电弧不熄灭的熔滴过渡模式,是自保护药芯焊丝主要熔滴过渡模式之一;电弧电压和焊接电流波形没有短路过渡特征,表现为一定范围内小幅波动,与弧桥并存过渡特征相对应;电压概率密度分布曲线和电流概率密度曲线都没有短路过渡的特征;弧桥并存过渡的液桥是由熔融渣包裹液态金属混合形成的;自保护药芯焊丝弧桥并存过渡主要是在表面张力和电磁收缩力的共同作用下完成。By using the high speed photography,Hanover analyzer and macro-microscope,the tranfer characteristic and the tranfer mechanisim of metal transfer of self-shielded flux cored wire have been studied.The results reaveal that bridging transfer without arc interruption transfer is a kind of transfer which the bridge exists lastingly while the arc isn＇t extinguished,and it is one of the metal transfer models of self-shielded flux cored wire.Without the characteristic of short-circuit transfer,the wave pattern of arc voltage and welding current represent the slight waving within a certain scope,corresponding to the characteristic of bridging transfer without arc interruption,the U-PDD I-PDD doesn＇t show the characteristic of short circuit transfer.The bridge of bridging transfer without arc interruption is formed of mixture of the slag＇s covering the liquid metal.The accomplishment of bridging transfer without arc interruption is mainly conducted by joint work of surface tension and electromagnetic force.

关 键 词：自保护药芯焊丝 弧桥并存过渡 电弧参数 熔滴过渡 

分 类 号：TG422.3[金属学及工艺—焊接]