电焊机2018，Vol.48Issue(1)：52-56,5.DOI:10.7512/j.issn.1001-2303.2018.01.13
厚板TC4钛合金磁控窄间隙TIG焊接工艺
Study on magnetically controlled narrow-gap TIG welding of thick plate TC4 titanium alloy
摘要
Abstract
The magnetically controlled narrow-gap welding technology was used to weld the 30 mm and 100 mm thick TC4 titanium alloy.Welding was performed under different magnetic induction,after that the microstructures of the joints were analyzed to study the influence of the magnetic field on weld structure.Typical defects of the joints were studied,and the effects of arc swing and electrode position on weld formation were studied.Mechanical properties of the joints were tested.The results show that the applied magnetic field has the effect of fine grain and size of needle-type martensite in the weld was significantly decreased.The external magnetic field can effectively avoid the problem of poor sidewall fusion and achieve joints with good fusion sidewall.Electrode should be strictly placed in the center of the gap in order to obtain a uniform sidewall penetration.Welded joints had good mechanical properties,the average tensile strength of the joints reached 96％ of that of the base metal.关键词
钛合金/TC4/厚板/窄间隙焊接/磁控Key words
titanium alloy/TC4/thick plate/narrow-gap welding/magnetically controlled分类
矿业与冶金引用本文复制引用
余陈,张宇鹏,徐望辉,房卫萍..厚板TC4钛合金磁控窄间隙TIG焊接工艺[J].电焊机,2018,48(1):52-56,5.基金项目
广东省科技项目(2017A070701026 （）
2016B070701025) （）
攀钢科技合作项目(2014-03 （）
2015-10) （）
