Effect of offset value on microstructure and properties of aluminum/steel cutting-assisted welding brazing

TAN Pan; CHENG Chen; QIU Chengguo; LI Bangjin; YANG Donghua; CONG Wei; XU Huibin

doi:10.12073/j.hjxb.20220523003

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2023 > 44(4): 98-104. > DOI: 10.12073/j.hjxb.20220523003

TAN Pan, CHENG Chen, QIU Chengguo, LI Bangjin, YANG Donghua, CONG Wei, XU Huibin. Effect of offset value on microstructure and properties of aluminum/steel cutting-assisted welding brazing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2023, 44(4): 98-104. DOI: 10.12073/j.hjxb.20220523003

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Effect of offset value on microstructure and properties of aluminum/steel cutting-assisted welding brazing

1.
Chongqing University of Technology, Chongqing, 400054, China
2.
Chongqing Dajiang Industry Co., Ltd., Chongqing, 401321, China

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Received Date: May 22, 2022
Available Online: March 27, 2023

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Abstract

Abstract

The cutting-assisted welding brazing (CAWB) without flux, the effect of offset value of the 5052 aluminum alloy and SUS304 stainless steel was studied. Scanning electron microscope, energy dispersive spectroscopy and tensile testing machine were used to analyze the microstructure and mechanical properties of the welded joint. The results showed that metallurgical bonding occurs to the interface of aluminum/steel joints assisted by the cutting tool. Thickness of intermetallic compound layered at the interface and the number and size of phase particles of the weld increased with the growth in offset value. The joint strength first grew and then decreased with the increase of the offset value. With the increase of offset value, the interface morphology gradually evolved from flat interface to periodic wave interface, and finally to a laminated interface. When the offset value was 0.2 mm, the 'macro + micro' scale double self-locking interface structure was obtained, and the mechanical properties of the joint were improved. The average tensile strength of the joint was up to 152 MPa.
- dissimilar metal joining,
- arc brazing,
- offset value,
- intermetallic compound,
- tensile strength

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