工艺参数对耦合AA-TIG焊电弧阳极电流密度的影响  

Effects of arc parameters on arc anode current density of coupling AA-TIG arc

作　　者：黄勇[1,2] 王新鑫[2] 瞿怀宇[2] 樊丁[1,2] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料国家重点实验室,兰州730050 [2]兰州理工大学有色金属材料先进加工成形技术教育部重点实验室,兰州730050

出　　处：《焊接学报》2014年第2期5-9,113,共5页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51074084);甘肃省自然科学基金资助项目(1010RJZA037)

摘　　要：针对耦合电弧AA-TIG焊,采用基于不锈钢阳极的钨探针法研究了主要工艺参数对电弧阳极电流密度分布的影响规律.与常规TIG焊电弧相比,在相同条件下耦合AA-TIG焊电弧的阳极电流密度明显降低,并随着电弧电流和辅助电弧中氧气流量的减小以及钨极间距和弧长的增大而减小.当主钨极和辅助钨极的间距较小时,耦合AA-TIG焊电弧的阳极电流密度符合高斯分布;当钨极间距较大时,阳极电流密度向双峰分布过渡,电弧边缘部位符合二次高斯分布,而中心部位偏离二次高斯分布.Influences of main process parameters on arc anode current density distribution of coupling arc AA-TIG welding were analyzed,using the tungsten probe measurement based on stainless steel anode.Compared with normal TIG arc,the anode current density of coupling AA-TIG arc is obviously lower in the same condition.It is decreased with the increase of arc current and oxygen flowrate in the assisted arc,the decrease of tungsten electrode spacing and arc length.When the spacing between the main electrode and assisted electrode is small,the distribution of arc anode current density fits a Gaussian profile.When the electrode spacing is large,it gradually turns to a bimodal distribution.The anode current density at the arc edge is consistent with a quadratic Gaussian distribution,while that at the middle region between the main arc and assisted arc deviates from the quadratic Gaussian distribution.

关 键 词：AA—TIG焊 耦合电弧 氧元素 阳极电流密度 探针法 

分 类 号：TG404[金属学及工艺—焊接]