Reactive brazing of Al alloy to Mg alloy using zinc-based brazing alloy |
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| Affiliation: | 1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;2. Shandong Provincial Key Lab of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China;1. College of Materials Science and Engineering, Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China;2. Department of Mechanical Engineering, Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Tsinghua University, Beijing 100084, PR China;3. School of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China;4. R&D Department, Yongtai Electric (Dong Guan) Co., Ltd, Dongguan, Guangdong 523000, PR China;5. State Key Laboratory of Advanced Welding & Joining, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, PR China |
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| Abstract: | According to the feature of Mg–Zn eutectic reaction, Al alloy was bonded to Mg alloy by contact reaction brazing using a zinc-based brazing alloy successfully. The experimental observations showed that Mg–Al intermetallic compounds were avoided for the addition of the zinc-based brazing alloy. The Mg substrate and the remanent brazing alloy were bonded with the reaction zone that formed along the zinc rich and magnesium poor interface. Only a few Mg–Zn intermetallic compounds (MgZn2) existed homogeneously in the reaction zone. The substrate and the remanent brazing alloy were bonded with a thin Al–Zn solution. The average tensile-shear strength of the final joints was a little lower than that of the zinc-based brazing alloy owning to some pores at the interface between the reaction zone and the remanent brazing alloy layer. |
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