Effect of weld microstructure on weld properties in A-TIG welding of titanium alloy中国有色金属学会会刊：英文版论文
【题名】：Effect of weld microstructure on weld properties in A-TIG welding of titanium alloy中国有色金属学会会刊：英文版论文(Effect of weld microstructure on weld properties in A-TIG welding of titanium alloyZhongGuoYouSeJinShuXueHuiHuiKan：YingWenBanLunWen) 【关键词】：钛合金 TIG焊 显微结构 焊接 机械性能 【keywords】：ZuoHeJin TIGHan XianWeiJieGou HanJie JiXieXingNeng 【作者】：刘凤尧 杨春利 林三宝 吴林 苏生      【来源】： 知识词典 【期刊名称】：中国有色金属学会会刊：英文版(ZhongGuoYouSeJinShuXueHuiHuiKan：YingWenBan) 【国际标准刊号】：1003-6326        【国内统一刊号】：43-1239 【作者单位】：NationalKeyLaboratoryofAdvancedWeldingProductionTechnology,HarbinInstituteofTechnology,Harbin150001,China(NationalKeyLaboratoryofAdvancedWeldingProductionTechnology,HarbinInstituteofTechnology,Harbin150001,China) 【分类号】：TG457.19 TG146.23      【页码】：-876-880      【出版年】：2003.4 【下载地址】：下载pdf全文         Conventional TIG welding is known as its low productivity and limited weld depth in a single pass. Acti-vating TIG welding (A-TIG) can greatly improve the penetration when compared with the conventional TIG welding. The effects of five kinds of activating fluxes with single component (NaF, CaF2, AlF3, NaCl or CaCl2 ) on penetration, microstructure and weld mechanical properties during the TIG welding of titanium alloy Ti-6AI-4V were studied. Compared with the conventional TIG welding, the experimental results show that the fluxes can greatly improve the penetration at the same welding specifications. This is because of the constriction of anode spots and the change of surface tension grads. Among them the effect of flux NaF is the best in the weld tensile strength, and the effect of flux CaFz on the weld bend intension is the best. The appearance of inferior crystal grains and the structure of trident crystal grains are the main reasons that the performance of weld with fluoride is improved. These experi-mental results can be used as an aid for selecting suitable activating flux for titanium alloy.
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