Processing parameters, microstructures and mechanical property of Al/steel dissimilar metals butt joint made by CMT welding-brazing

Yu Tengyi; Li Wei; Yu Gaoyang; Li Yan; Chen Shuhai; Liu Ke

doi:10.7513/j.issn.1004-7638.2023.05.028

Volume 44 Issue 5

Oct. 2023

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Yu Tengyi, Li Wei, Yu Gaoyang, Li Yan, Chen Shuhai, Liu Ke. Processing parameters, microstructures and mechanical property of Al/steel dissimilar metals butt joint made by CMT welding-brazing[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(5): 188-194. doi: 10.7513/j.issn.1004-7638.2023.05.028

Citation:

Yu Tengyi, Li Wei, Yu Gaoyang, Li Yan, Chen Shuhai, Liu Ke. Processing parameters, microstructures and mechanical property of Al/steel dissimilar metals butt joint made by CMT welding-brazing[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(5): 188-194. doi: 10.7513/j.issn.1004-7638.2023.05.028

Citation:

Yu Tengyi, Li Wei, Yu Gaoyang, Li Yan, Chen Shuhai, Liu Ke. Processing parameters, microstructures and mechanical property of Al/steel dissimilar metals butt joint made by CMT welding-brazing[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(5): 188-194. doi: 10.7513/j.issn.1004-7638.2023.05.028

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Processing parameters, microstructures and mechanical property of Al/steel dissimilar metals butt joint made by CMT welding-brazing

doi: 10.7513/j.issn.1004-7638.2023.05.028

1.
Pangang Group Research Institute Co., Ltd, State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, Sichuan, China
2.
School of Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 2022-05-06
Available Online: 2023-11-04
Publish Date: 2023-10-31

Abstract

Abstract

A 2 mm thick Q235 steel plate and a 5052 aluminum alloy plate had been used for CMT arc butt welding-brazing. The effects of welding speed and wire feeding speed on joint weld formation, interface microstructure and mechanical properties were studied. The results show that when the wire feeding speed is 5.6 m/min and the welding speed is 0.48 m/min, the back weld formation, the wetting and spreading of filler in the base metal can be achieve at satisfied level. A interfacial reaction layer with average thickness less than 10 μm forms. The intermetallic compound layer is mainly composed of needle like Fe₂Al₅ growing towards the steel side and FeAl₃ near the aluminum side. When the filler is well wetted and spread, and had back forming, the joint strength can reach 158.3 MPa and the joint fractured at the aluminum base metal. For the rest of the samples, they were broken at the brazing interface, and the joint strength increased with the decrease of the thickness of intermetallic compound at the interface. After removing the joint reinforcement, the joint strength decreased obviously and the highest tensile strength of welding joints is only 67.9 MPa.
- Al/steel joint,
- CMT arc,
- processing parameters,
- microstructures,
- mechanical property

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References(14)

References

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