金属加工（热加工）Issue(12)：36-45,51,11.
氩氢混合气体对S30403不锈钢K-TIG焊接接头组织与性能的调控机制研究
Study on the regulation mechanism of argon-hydrogen mixed gas on the microstructure and properties of S30403 stainless steel K-TIG welded joints
摘要
Abstract
The application of pure argon and argon-hydrogen mixed gas in K-TIG welding of S30403 stainless steel was discussed.The arc morphology under two shielding gases was observed by high-speed camera technology.Combined with electron backscatter diffraction,microhardness and tensile tests,the influence mechanism of hydrogen on the welding process was systematically studied.The results show that the penetration depth under the protection of argon-hydrogen mixed gas is greater than that under the protection of pure argon,and there are no defects such as pores in the weld.The arc under the protection of argon-hydrogen mixed gas is more concentrated,the arc diameter is significantly reduced,and the arc stiffness and heat source energy density are improved.In addition,the weld microstructure under argon-hydrogen mixed gas protection showed more uniform multi-orientation characteristics,and the maximum texture index decreased from 33.96 under pure argon protection to 21.52.The addition of hydrogen significantly reduced the ferrite content in the weld(from 19.7％to 11.7％).Although the tensile strength decreased slightly(from 664.4MPa±2.3MPa to 658.2MPa±1.6MPa),the elongation increased(from 50.46％±0.89％to 53.23％±0.68％).The effect of hydrogen addition on the optimization of welding process was further verified.关键词
S30403不锈钢/K-TIG/氩氢混合气体Key words
S30403 stainless steel/K-TIG/argon-hydrogen mixed gas引用本文复制引用
李茂,祁凯,杜永勤,李瑞峰,张晓强,胡庆贤,孙修圣,陆玉华..氩氢混合气体对S30403不锈钢K-TIG焊接接头组织与性能的调控机制研究[J].金属加工（热加工）,2025,(12):36-45,51,11.基金项目
国家自然科学基金项目(52475360). （52475360）
