1 School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China 2 State Key Laboratory of Advanced Processing and Reuse of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
Abstract: Tungsten inert gas shielded welding (TIG welding) is one of the common methods for welding stainless steel, but it has some disadvantages such as beveling requirement when welding medium-thick plate, shallow weld depth, low productivity and poor economy. This work adopted a new efficient welding method—powder pool coupled active TIG welding (PPCA-TIG welding), taking 1Cr18Ni9Ti austenitic stainless steel as the research object, through the active agent ratio test to obtain the maximum depth of fusion weld, and studied the effect of active agent on the microstructure and mechanical properties of PPCA-TIG welding. The results show that, compared with the joints obtained from conventional TIG welding, when using D2 active agent ratio welding, the post-weld depth of fusion is increased by nearly 2.7 times, the arc shrinkage occurs signi-ficantly, the weld organization is refined; joint hardness is increased by 9.8%, tensile strength is increased by 53.7%, and the fracture mode of the joint is toughness fracture. In summary, D2 active agent is the optimal ratio for PPCA-TIG welding, this method not only improves the welding quality, but also significantly improves the production efficiency.
1 An L C, Cao J, Zhang T, et al. Materials and Corrosion, 2017, 68(10), 1116. 2 Soltani H M, Tayebi M. Journal of Alloys and Compounds, 2018, 767, 112. 3 Qian L X, Zhao W J. Coal Mine Machinery, 2006, 27(4), 637. 钱利霞, 赵万军. 煤矿机械, 2006, 27(4), 637. 4 Liu Z G, Zhou X J, Zhu T T, et al. Materials Reports, 2021, 35(S2), 353(in Chinese). 刘自刚, 周晓静, 朱婷婷, 等. 材料导报, 2021, 35(S2), 353. 5 Huang Y, Zhao W Q, Zhang L Y. Materials Reports, 2017, 31(22), 70(in Chinese). 黄勇, 赵文强, 张利尧. 材料导报, 2017, 31(22), 70. 6 Zeng T, Chao Y J, Zou L J, et al. Ordnance Material Science and Engineering, 2018, 41(4), 82(in Chinese). 曾涛, 晁耀杰, 邹龙江, 等. 兵器材料科学与工程, 2018, 41(4), 82. 7 Fujii H, Sato T, Lu S, et al. Materials Science and Engineering A, 2008, 495(1-2), 296. 8 Tseng K H, Chen K L. Journal of Nanoscience and Nanotechnology, 2012, 12(8), 6359. 9 Huang Y, Liu R L, Fan D, et al. Journal of Welding, 2012, 33(9), 13(in Chinese). 黄勇, 刘瑞琳, 樊丁, 等. 焊接学报, 2012, 33(9), 13. 10 Huang Y, Wang B, Guo J, et al. Metals, 2023, 13(5), 830. 11 Liu Y H, Ren C J, Xiang Y J, et al. Materials Reports, 2025, 39(1), 254 (in Chinese). 刘元昊, 任昌敬, 向彦君, 等. 材料导报, 2025, 39(1), 254. 12 Simonik A G. Welding Production, 1976, 3, 49. 13 Simonik A G. Svarochnoye Proizvodstvo, 1974, 3, 52. 14 Paton B E, Zamkov V N, Prilutsky V P, et al. Paton Welding Journal C/C of Avtomaticheskaia Svarka, 2000, 2000(1), 5. 15 Zhu W, Wu J X, Shen S H. Metallurgy and Materials, 2020, 40(2), 63 (in Chinese). 朱玮, 吴建祥, 沈圣华. 冶金与材料, 2020, 40(2), 63. 16 Dahotre N B, McCay M H, McCay T D, et al. Journal of Materials Research, 1991, 6(3), 514.
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