冷喷涂Zn粉后5083铝合金的中温钎焊研究<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.04.012

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Abstract With Zn and 5wt% CsF-AlF₃ eutectic flux mixed powders as raw materials, coatings on 5083 aluminum alloy were prepared by cold gas dynamic spray, then the 5083 aluminum alloy deposited coatings were brazed at 530 ℃.The microstructure and composition of the coatings and brazing joint were characterized by SEM and EDS. The results reveal that the combination between coatings and 5083 aluminum alloy substrate is tight, the CsF-AlF₃ eutectic flux particles appear at the interface of Zn particles. Due to the protection of coatings, the Mg element isn′t enriched at the 5083 aluminum alloy outermost surface during brazing and the complex oxide film doesn′t form, the bonding of 5083 aluminum alloy deposited coatings and 1060 aluminum alloy can be realized. The brazing joint has a homogeneous microstructure consisting of aluminum based solid solution (α phase) and zinc based solid solution (β phase), only a little of cavities defects occur.

Key words： 5083 aluminum alloy oxide film middle temperature brazing cold spray

Published: 25 February 2017 Online: 2018-05-02

CLC number:

TG454

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.04.012 OR https://www.mater-rep.com/EN/Y2017/V31/I4/52

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