旁路耦合电弧TIG焊原理及工艺研究  

Study on Principle and Process of Bypass Coupled Arc TIG Welding

作　　者：高东 李永利 邓颖 周好斌[2] GAO Dong;LI Yongli;DENG Ying;ZHOU Haobin(Western Baode Technology Co.,Ltd.,Xi'an 710299,China;School of Material Science and Engineering,Xi'an Shiyou University,Xi'an 710065,China)

机构地区：[1]西部宝德科技股份有限公司,陕西西安710299 [2]西安石油大学材料科学与工程学院,陕西西安710065

出　　处：《热加工工艺》2025年第1期65-69,共5页Hot Working Technology

摘　　要：对单电源双电极旁路耦合电弧焊接方法进行了研究,主路电极是钨极,旁路电极是焊丝。首先剖析了旁路电弧产生及分流机理,利用搭建的焊接试验装置对双电极组合几何参数进行研究,再采用H08Mn2Si焊丝在Q235钢板表面进行平板堆焊试验,对旁路送丝速度与旁路电流、焊接过程稳定性、基体金属热输入的影响关系进行了研究,得到了不同总电流下稳定焊接过程的旁路送丝速度区间;最后对焊缝宏观形貌、微观形貌特征进行了分析。结果表明:当总电流一定时,随着旁路电流逐渐增大,基体金属热输入逐渐降低,焊缝宽度明显减小,焊缝高度增大,焊缝截面宽高比减小;旁路电流的增大使得焊缝过热区宽度、熔深及晶粒直径显著减小。The single-power double-electrode bypass coupled arc welding process was studied.The main electrode is tungsten and the bypass electrode is wire.Firstly,the generation and shunt mechanism of bypass arc was analyzed,and the geometric parameters of double electrode combination were studied by using the built welding test device.Then,H08Mn2Si welding wire was used to conduct surfacing test on the surface of Q235 steel plate.The influence relationship between bypass wire feeding speed and bypass current,welding process stability and heat input of base metal was studied,and the bypass wire feeding speed interval was obtained at different total currents.Finally,the macro-morphology and micro-morphology characteristics of the welds were analyzed.The results show that when the total current is constant,as the bypass current increases gradually,the heat input of the base metal decreases gradually,the weld width decreases significantly,the weld height increases,and the width to height ratio of the weld decreases.The increase of the bypass current makes the width of the weld overheat zone,the penetration depth and the grain diameter decrease significantly.

关 键 词：旁路耦合电弧 TIG焊 堆焊 旁路电流 

分 类 号：TG444.7[金属学及工艺—焊接]