Microstructure and Properties of Copper-Steel TIG Welding Joint Assisted by DC Magnetic Field
RONG Yi1, WANG De1, CHEN Yiping1, XIONG Zhenyu1, CHENG Donghai1, HU De'an1, ZOU Pengyuan2, LI Wenjie1
1 School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330036, China 2 School of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330031, China
Abstract: The butt joint test of different materials of copper and steel was conducted by using DC magnetic field assisted TIG welding. The influence of DC magnetic field on the microstructure and mechanical properties of TIG welding joint was analyzed. The results show that when the magnetic field intensity B=10 mT, the appearance of the joint is good and the weld has no porosity and other defects. With the increase of magnetic field strength, the tensile strength of the joint first increases and then decreases. When B=10 mT, the tensile strength of the joint reached the highest (194.6 MPa), which increased by 25.79% compared with no magnetic field. The micro-vickers hardness of the joint fusion zone increased by 8.8%. The joint was composed of steel base material, steel side heat affected zone, steel side fusion zone, weld zone, copper side heat affected zone and copper base material. The fusion zone tissue from a large globular particles (Ⅰ layer) and strip granules (Ⅱ layer) of copper steel solid solution.When B=10 mT, Ⅰ layer spherical iron-rich phase appeared obvious reunion phenomenon and containing copper particles increased, gyrate (α+ε) bipolar tissue increasing much and curl, iron substrate from mesh into small strips;Ⅱ layer iron-rich phase disappeared and (α+ε) bipolar thickness of the organization thinned.The increase of the curl and the aggregation of Fe rich phase in the fusion zone enhanced the mechanical bite and the second phase strengthening. It is the reason that the strength and hardness of the joint improve.
戎易, 王德, 陈益平, 熊震宇, 程东海, 胡德安, 邹鹏远, 李文杰. 直流磁场辅助铜-钢TIG焊接头组织和性能[J]. 材料导报, 2021, 35(22): 22137-22140.
RONG Yi, WANG De, CHEN Yiping, XIONG Zhenyu, CHENG Donghai, HU De'an, ZOU Pengyuan, LI Wenjie. Microstructure and Properties of Copper-Steel TIG Welding Joint Assisted by DC Magnetic Field. Materials Reports, 2021, 35(22): 22137-22140.
1 Shi Y, Gao H M, Li G, et al. Materials Reports B:Research Papers, 2018, 32(6), 909(in Chinese). 石玗, 高海铭, 李广, 等. 材料导报:研究篇, 2018, 32(6), 909. 2 Hou L T, Chen W G, Liu Y B, et al. Chinese Journal of Materials Research, 2015, 29(09), 693(in Chinese). 侯林涛, 陈文革, 刘盈斌, 等. 材料研究学报, 2015, 29(09), 693. 3 Poo-arporn Y, Duangnil S, Bamrungkoh D, et al. Journal of Materials Processing Technology, 2020, 277. 4 Cheng Z, Huang J, Ye Z, et al. Journal of Materials Processing Techno-logy, 2019, 265, 87. 5 Joshi G R, Badheka V J. Metallography Microstructure and Analysis, 2017, 6(6), 470. 6 Joshi G R, Badheka V J. Materials and Manufacturing Processes, 2019, 34(11), 1232. 7 Zhang Y, Huang J, Chi H, et al. Materials Letters, 2015, 156, 7. 8 Zhang H, Jiao K X, Zhang J L, et al. Materials Science and Enginee-ring: A, 2018, 731, 278. 9 Magnabosco I, Ferro P, Bonollo F, et al. Materials Science and Engineering: A, 2006,424(1). 10 Mannucci A, Tomashchuk I, Vignal V, et al. Procedia CIRP, 2018, 74, 450. 11 Chen S, Huang J, Xia J, et al. Metallurgical and Materials Transactions: A, 2013, 44(8), 3690. 12 Miao Y G, Li C W, Zhao H H, et al. Transactions of the China Welding Institution, 2019, 40 (5), 95(in Chinese). 苗玉刚, 李春旺, 赵慧慧, 等. 焊接学报, 2019, 40(5), 95. 13 Chen R, Jiang P, Shao X, et al. The International Journal of Advanced Manufacturing Technology, 2017, 91(9-12), 3437. 14 Li J Z. Research on process and mechanism of magnetic field assisted MIG welding-brazing for Ti/Al dissimilar alloys. Master's Thesis, Harbin Institute of Technology, China, 2017(in Chinese). 李军兆. 磁场辅助钛/铝异种金属MIG熔-钎焊工艺及机理研究. 硕士学位论文, 哈尔滨工业大学, 2017. 15 Liu Z J, Song X K, Shao D W, et al. Transactions of the China Welding Institution, 2010, 31 (1), 71(in Chinese). 刘政军, 宋兴奎, 邵大伟, 等. 焊接学报, 2010, 31(1), 71. 16 Chen R, Jiang P, Shao X, et al. Journal of Materials Processing Techno-logy, 2017, 247, 306. 17 Jian L, Zongxiang Y, Keliang X. The International Journal of Advanced Manufacturing Technology, 2016, 84(1-4), 647.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2021, Vol. 35 
