Narrow gap space contributes to chemical metallurgy of self-shielded arc welding  

作　　者：Liu Dashuang Wei Ping Long Weimin Wu Yucheng Huang Wenbin 刘大双;魏萍;龙伟民;吴玉程;黄文斌(School of Material Science and Engineering,Hefei University of Technology,Hefei 230009,China;Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou 450001,China;China Innovation Academy of Intelligent Equipment(Ningbo)Co.,Ltd,Ningbo 315700,China;School of Material Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]School of Material Science and Engineering,Hefei University of Technology,Hefei 230009,China [2]Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou 450001,China [3]China Innovation Academy of Intelligent Equipment(Ningbo)Co.,Ltd,Ningbo 315700,China [4]School of Material Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China

出　　处：《China Welding》2021年第3期12-19,共8页中国焊接（英文版）

基　　金：supported by China Postdoctoral Science Foundation Funded Project(Grant No.2016M601753);Natural Science Foundation of Jiangsu Province(Grant No.BK20201453);Major Projects of Natural Science Research in Colleges and Universities in Jiangsu(Grant No.19KJA460009).

摘　　要：The slag-free self-shielded flux-cored wire was fabricated to apply for the narrow gap welding.The results showed that narrow gap welding shows lower welding spatter compared with hardfacing except under voltage of 30 V and current of 260 A.The deposition efficiency keeps over 90%for both 12 mm and 8 mm narrow gap welding.For 12 mm narrow gap welding,when the voltage is 28 V and the current is 264 A(or 286 A),no pores are found in the narrow gap weld.In the continuous welding process,manganese vapor,aluminum vapor and CO continuously generate to form gasbag and occupy the narrow gap space,thus protecting the droplet and molten pool from the invasion of air.

关 键 词：Narrow gap welding self-shielded flux-cored wire deposition efficiency welding spatter 

分 类 号：TG422.3[金属学及工艺—焊接]