不锈钢AA-TIG焊接法  

Arc Assisted Activating TIG Welding Process for Stainless Steels

作　　者：黄勇[1] 樊丁[1] 林涛[1] 雒焕胜[1] 闫鑫[1] 杨元江[1] 

机构地区：[1]兰州理工大学有色金属新材料国家重点实验室,兰州730050

出　　处：《机械工程学报》2010年第8期68-72,共5页Journal of Mechanical Engineering

基　　金：教育部春辉计划(Z2005-1-62007);教育部博士学科点专项基金(20040731001)

摘　　要：针对不锈钢,提出一种新型活性TIG焊方法——电弧辅助活性TIG焊,即AA-TIG焊。采用CO2+Ar作为小电流钨极电弧的保护气体进行单弧AA-TIG焊,分别研究小电流钨极电弧和正常TIG焊工艺参数对焊缝熔深的影响,并针对试验范围内的最佳焊接规范研究不锈钢AA-TIG焊的焊缝成形、焊缝显微组织、化学成分和焊缝性能。采用AA-TIG焊可以单道焊透10mm厚的不锈钢板材,单面焊双面成形。与传统TIG焊相比,焊缝组织和化学成分几乎没有变化,焊缝的耐Cu/CuSO4腐蚀性能和低温冲击韧度都满足相关标准要求。A new activating TIG welding process for stainless steels called AA-TIG welding is proposed.The CO2＋Ar mixing gas is used as the activating mixing shielding gas of the low current tungsten electrode arc.A series of single-arc AA-TIG welding experiments are made to study the effects of experimental parameters of low current tungsten electrode arc and normal TIG welding on the weld penetration of AA-TIG welding.For the optimal process parameters,the weld forming,weld microstructure,weld composition and weld property are also investigated.The results indicate that AA-TIG welding can be used to get full penetration of 10 mm thickness stainless steel plate in a single pass.Compared with conventional TIG welding,there is hardly any difference between the weld microstructures and the weld compositions of conventional TIG welding and AA-TIG welding.The Cu/CuSO4 corrosion resistance and the low temperature impact toughness of the weld of AA-TIG welding meet the related standards.

关 键 词：不锈钢 活性TIG焊 AA-TIG焊 焊缝成形 焊缝组织 焊缝化学成分 焊缝性能 

分 类 号：TG444[金属学及工艺—焊接]