钨极氩弧搭接焊钽片接头的显微组织
Microstructure of Tantalum Sheet Welded Joint by Argon Tungsten Arc Lap Welding
摘 要
采用钨极氩弧焊对0.6 mm厚钽片进行搭接焊，研究了焊接接头的显微组织。结果表明：焊缝成形良好；上层钽片上表面、上下钽片接触面处和下层钽片下表面处均出现了氧化层；在焊接热作用下，热影响区发生动态再结晶，母材的晶粒由原始细长状转变为等轴状，且晶粒粗化；氩气并不能完全隔绝空气，焊缝不同区域发生不同程度的氧化，由未氧化或氧化程度较轻的浅色物质与氧化程度较重的深色物质混合组成，浅色物质呈珊瑚状形貌。
搭接焊
钨极氩弧焊
氧化
珊瑚状形貌
tantalum sheet
lap welded
argon tungsten arc welding
oxidation
coral-like morphology
Abstract
The 0.6 mm thick tantalum sheet was lap welded by argon tungsten arc welding, and the microstructure of the welded joint was studied. The results show that the weld was well formed. Oxide layers appeared on the upper surface of the upper tantalum sheet, on the contact surface of the upper and lower tantalum sheets, and on the lower surface of the lower tantalum sheet. The heat affected zone underwent dynamic recrystallization, and the grains of the base metal transformed into an equiaxed shape from the original slender shape and were coarsened under the effects of welding heat. Argon gas can not isolate the air completely, leading to different degrees of oxidation in different areas of the weld. The weld was composed of light colored substances without oxidation or with less oxidation and dark colored substances with a deeper degree of oxidation. Light colored substances had coral-like shapes.
中图分类号 TG456 DOI 10.11973/jxgccl202009005
所属栏目 试验研究
基金项目 江钨控股集团重大科技专项项目（JWGF-19ZD-02）
收稿日期 2019/9/23
修改稿日期 2020/8/3
网络出版日期
作者单位点击查看
备注陈燕飞(1990-),男,江西赣州人,工程师,硕士
引用该论文: CHEN Yanfei,LAI Huasheng,ZHU Zhengqiang,WEN Xiaoqiang,YUAN Delin,WANG Yuxiang. Microstructure of Tantalum Sheet Welded Joint by Argon Tungsten Arc Lap Welding[J]. Materials for mechancial engineering, 2020, 44(9): 31～35
陈燕飞,赖华生,朱政强,文小强,袁德林,王玉香. 钨极氩弧搭接焊钽片接头的显微组织[J]. 机械工程材料, 2020, 44(9): 31～35
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【11】GREVEY D,VIGNAL V,BENDAOUD I,et al.Microstructural and micro-electrochemical study of a tantalum-titanium weld interface[J].Materials & Design, 2015,87:974-985.
【12】VOLKOVA A Y,GREENBERG B A,IVANOV M A,et al.Electron-microscopic examination of the transition zone of aluminum-tantalum bimetallic joints (explosion welding)[J].The Physics of Metals and Metallography, 2014,115(4):380-391.
【13】周方明,钱乙余,张景,等.钽薄壁管GTA焊接接头晶粒细化机理[J].焊接学报,2006,27(6):41-44.
【14】季良,杨武雄,肖荣诗.金属钽箔十字交叉激光微点焊工艺研究[J].应用激光,2013,33(6):601-605.
【15】李格妮.钽材激光焊接工艺试验研究[J].山东工业技术,2018(23):13.
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