冷喷涂Zn粉后5083铝合金的中温钎焊研究*

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

《材料导报》期刊社

2017, Vol. 31

Issue (4): 52-55 https://doi.org/10.11896/j.issn.1005-023X.2017.04.012

材料研究

冷喷涂Zn粉后5083铝合金的中温钎焊研究^*

何培龙¹, 程方杰^1,2, 齐书梅¹, 肖兵¹, 赵欢¹

1 天津大学材料科学与工程学院, 天津 300072;
2 天津大学现代连接技术天津市重点实验室, 天津 300072

Study on Middle Temperature Brazing of 5083 Aluminum Alloy After
Depositing Zn Coatings Produced by Cold Gas Dynamic Spray

HE Peilong¹, CHENG Fangjie^1,2, QI Shumei¹, XIAO Bing¹, ZHAO Huan¹

1 School of Materials Science and Engineering, Tianjin University, Tianjin 300072;
2 Tianjin Key Laboratory of Advanced Welding and Joining, Tianjin University, Tianjin 300072

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摘要以添加了5%(质量分数,下同)CsF-AlF₃共晶钎剂的Zn粉为原料,采用冷喷涂技术在5083铝合金表面制备涂层,喷涂后的5083铝板在530 ℃进行钎焊连接。采用扫描电子显微镜结合能谱仪对涂层的显微结构及钎焊后的接头组织形貌进行观察与分析。结果表明:涂层与5083基体连接致密,钎剂颗粒呈絮状存在于Zn粒子交界面处;由于涂层对5083基体的保护,钎焊时5083基体表面没有出现Mg元素上浮现象,表面未形成复杂的氧化膜,530 ℃喷涂后的5083与1060可成功实现连接;钎焊接头组织均匀,主要由α铝基固溶体和β富锌基固溶体组成,存在少量孔洞缺陷。

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关键词: 5083铝合金氧化膜中温钎焊冷喷涂

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

出版日期: 2017-02-25 发布日期: 2018-05-02

ZTFLH:

TG454

基金资助: *国家自然科学基金(51275351);天津市自然科学基金重点项目(13JCZDJC33500)

通讯作者: 程方杰:通讯作者,男,1971年生,博士,教授,主要研究方向为先进连接工艺方法 E-mail:chfj@tju.edu.cn

作者简介: 何培龙:男,1992年生,硕士研究生,主要研究方向为中温铝钎剂材料设计 E-mail:hepeilong007@tju.edu.cn

引用本文:

何培龙, 程方杰, 齐书梅, 肖兵, 赵欢. 冷喷涂Zn粉后5083铝合金的中温钎焊研究^*[J]. 《材料导报》期刊社, 2017, 31(4): 52-55.

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http://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2017.04.012 或 http://www.mater-rep.com/CN/Y2017/V31/I4/52

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