气体熔池耦合活性TIG焊方法  

Gas pool coupled activating TIG welding method

作　　者：黄勇[1,2] 刘瑞琳[2] 樊丁[1,2] 康再祥[1] 郝延召[2] 瞿怀宇[2] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,兰州730050 [2]兰州理工大学有色金属合金及加工教育部重点实验室,兰州730050

出　　处：《焊接学报》2012年第9期13-16,113,共4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：提出了一种新型活性TIG焊方法——气体熔池耦合活性TIG焊,即GPCA-TIG焊.该焊接方法将气体分两层流动,内层气体采用惰性气体起到保护熔池的作用;外层气体则为含活性元素O的气体,将活性元素O引入熔池金属,达到增加熔深的目的.文中以SUS304不锈钢为焊接母材,研究了GPCA-TIG焊接法对焊接电弧及焊缝成形的作用,以及该方法主要工艺参数对焊缝熔深和深宽比的影响.结果表明,在相同参数下,与常规TIG焊方法相比,GPCA-TIG焊可不开坡口一次性焊透8 mm不锈钢板,焊接效率明显提高.同时采用该方法,可以有效避免钨极的氧化烧损.A new welding method named gas pool coupled activating TIG welding was proposed,which contains two layers of shielding gas.The inner inert gas can protect the molten pool,and the outer active gas can provide active element into the molten pool to obtain narrow and deep weld.By taking SUS304 stainless steel as based metal,the effect of GPCA-TIG method on welding arc and weld appearances was studied.In addition,the effect of main welding parameters on weld penetration and D/W ratio was also studied.The results indicate that at the same welding conditions with the traditional TIG welding,the 8 mm thickness stainless steel can be fully penetrated with GPCA-TIG welding process without making a groove.This method can avoid the oxidation of tungsten electrode in welding process.

关 键 词：GPCA—TIG焊 气体熔池耦合 外层气体 O元素 

分 类 号：TG444[金属学及工艺—焊接]