Technology and Microstructure for Laser Welding-brazing Assisted by Transporting Flux with Shielding Gas between Steel and Aluminum

doi:10.3901/JME.2020.06.050

Abstract

Abstract: In order to solve the problem of poor wettability of liquid metal on the surface of stainless steel, a new method of powder flux transported by shielding gas is proposed to assist laser welding-brazing process. Laser welding-brazing of 5052 aluminum alloy and stainless steel with/without filler wire is carried out. Influence of welding heat input on wetting angle and mechanical property is studied. The typical microstructure of the joint with/without filler wire is analyzed. The results show that the laser welding brazing assisted by transporting flux with shielding gas for stainless steel/aluminum alloy dissimilar metals could improve wettability of liquid metal on stainless steel effectively. When the filler wire is used, the wetting angle of the joint is 37 degree. The tensile strength of the joint is about 132.8 MPa, which is about 62.7% of the strength of the aluminum alloy (211.7 MPa). In absence of filler wire, the wetting angle of the joint is 18.8 degree. The tensile strength of the joint is about 109.2 MPa, which is about 51.6% of the strength of the aluminum alloy. Two intermetallic compounds (Fe₂Al₅ and FeAl₃) will be form at the steel side interface with or without filler wire.

Key words: steel/aluminum joining, laser welding-brazing, welding technology, microstructure

CLC Number:

TG456

YU Gaoyang, CHEN Shuhai, HUANG Jihua, YANG Jian, ZHAO Zhiyi. Technology and Microstructure for Laser Welding-brazing Assisted by Transporting Flux with Shielding Gas between Steel and Aluminum[J]. Journal of Mechanical Engineering, 2020, 56(6): 50-56.

References

[1] CHEN Shuhai, YANG Dawei, YANG Jian, et al. Nanoscale structures of the interfacial reaction layers between molten aluminium and solid steel based on thermophysical simulations[J]. Journal of Alloy and Compounds, 2018, 739:184-189.
[2] CHEN Shuhai, YANG Dongdong, ZHANG Minxin, et al. Interaction between the growth and dissolution of intermetallic compounds in the interfacial reaction between solid iron and liquid aluminum[J]. Metallurgical and Materials Transactions A, 2016, 47A:5088-5100.
[3] 龙江启,兰凤崇,陈吉清.车身轻量化与钢铝一体化结构新技术的研究进展[J].机械工程学报, 2008, 44(6):27-35. LONG Jiangqi, LAN Fengchong, CHEN Jiqing. New technology of lightweight and steel-aluminum hybrid structure car body[J]. Chinese Journal of Mechanical Engineering, 2008, 44(6):27-35.
[4] SPRINGER H, KOSTKA A, PAYTON E J, et al. On the formation and growth of intermetallic phases during interdiffusion between low-carbon steel and aluminum alloys[J]. Acta Materialia, 2011, 59(4):1586-1600.
[5] 石玗,温俊霞,黄健康,等.基于旁路耦合电弧的铝钢MIG熔钎焊研究[J].机械工程学报, 2011, 47(16):25-29. SHI Yu, WEN Junxia, HUANG Jiankang, et al. Study on DE-GMAW MIG-brazing method for bonding steel with aluminum[J]. Chinese Journal of Mechanical Engineering, 2011, 47(16):25-29.
[6] JAIVINDRA S, KANWER S A, DIESH K S. Dissimilar MIG-CMT weld-brazing of aluminum to steel:A review[J]. Journal of Alloy and Compounds, 2019, 783:753-764.
[7] 陈树海,黄继华,陈彦宾,等.异种合金激光熔钎焊技术的现状与展望[J].焊接, 2011, 4:27-31. CHEN Shuhai, HUANG Jihua, CHEN Yanbin. The present situation and prospect of laser weld-brazing technology of dissimilar alloys[J]. Welding and Joining, 2011, 4:27-31.
[8] MASOUD M, NIMA Y, YANG Guang, et al. Effect of dual laser beam on dissimilar welding-brazing of aluminum to galvanized steel[J]. Optics and Laser Technology, 2018, 98(1):214-228.
[9] WAGNER F, ZERNER I, KREIMEYER M, SEEFELD T, et al. Characterization and properties of dissimilar metal combinations of Fe/Al and Ti/Al-sheet materials[C/CD]//Proc. ICALEO'01(CD-ROM), 2001.
[10] 林三宝,宋建岭,杨春利.铝合金/不锈钢钨极氩弧熔-钎焊接头界面层的微观结构分析[J].金属学报, 2009, 45(10):1211-1216. LIN Sanbao, SONG Jianling, YANG Chunli, et al. Microstructure analysis of interfacial layer with tungsten inert gas welding-brazing joint of aluminum/stainless steel[J]. Acta Metallurgica Sinica, 2009, 45(10):1211-1216.
[11] DONG Honggang, HU Wenjin, ZHANG Xuchao. Detachment of interfacial layers during arc-brazing of aluminum alloy to carbon steel with filler wire[J]. Transactions of Nonferrous Metals Society of China, 2013, 23(6):1583-1588.
[12] 宋建岭,林三宝,杨春利,等.特种钎剂辅助铝/钢异种合金TIG熔-钎焊[J].焊接学报, 2010, 31(2):45-48. SONG Jianling, LIN Sanbao, YANG Chunli, et al. TIG welding-brazing of special flux assisted aluminum-steel dissimilar alloys[J]. Transactions of the China Welding Institution, 2010, 31(2):45-48.
[13] 檀财旺,梅长兴,李俐群,等.镁/镀锌钢异种合金单、双光束激光熔钎焊特性[J].中国有色金属学报, 2012(6):1577-1585. TAN Caiwang, MEI Changxin, LI Liqun, et al. Single and dual beam laser welding-brazing characteristics of magnesium/zinc-coated steel dissimilar alloys. The Chinese Journal of Nonferrous Metals, 2012(6):1577-1585.
[14] 雷振,秦国梁,林尚扬,等.基于激光-MIG复合热源的5A02铝合金/镀锌钢熔-钎焊[J].机械工程学报, 2009, 45(3):94-98. LEI Zhen, QIN Guoliang, LIN Shangyang, et al. Fusion-brazing joining for dissimilar metals between 5A02 aluminium alloy and Zinc-coated steel based on laser-MIG hybrid welding[J]. Journal of Mechanical Engineering, 2009, 45(3):94-98.

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