钎焊温度对纳米银焊膏真空钎焊Ni200合金接头组织与性能的影响

doi:10.11896/cldb.201903002

材料导报

2019, Vol. 33

Issue (3): 386-389 https://doi.org/10.11896/cldb.201903002

材料与可持续发展（二）--材料绿色制造与加工^*

钎焊温度对纳米银焊膏真空钎焊Ni200合金接头组织与性能的影响

温丽¹, 薛松柏¹, 马超力¹, 龙伟民², 钟素娟²

1 南京航空航天大学材料科学与技术学院,南京 210016
2 郑州机械研究所有限公司新型钎焊材料与技术国家重点实验室,郑州 450001

Impact of Brazing Temperature on Microstructure and Mechanical Properties ofNi200 Alloys Joints by Vacuum Brazing Using Nanosilver Pastes

WEN Li¹, XUE Songbai¹, MA Chaoli¹, LONG Weimin², ZHONG Sujuan²

1 College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016
2 State Key Laboratory of Advanced Brazing Filler Metals and Technology, Zhengzhou Research Institute of Mechanical Engineering Co., Ltd., Zhengzhou 450001

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摘要采用改进的多元醇法制备纳米银线焊膏,制得的银焊膏性质稳定,微观形貌多呈线状,通过XRD和DSC对其成分和熔点进行了测试分析。随后采用制得的银焊膏对镍合金片(Ni200)进行真空钎焊试验,分析钎焊温度对钎焊接头显微组织和力学性能的影响规律。结果表明,增加钎焊温度可以提高钎焊接头内烧结组织的致密度,促进界面处原子间的互扩散作用,从而提高钎焊接头的抗剪强度。但温度过高时,接头性能略有下降。钎焊接头的抗剪强度在850 ℃时达到最大值42.5 MPa,较300 ℃时的抗剪强度增加了约912%。

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	温丽
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	钟素娟

关键词: 纳米银焊膏真空钎焊显微组织力学性能

Abstract: The nanosilver solder pastes prepared by improved polyol method exhibited favorable stability and linear micro-morphology mostly. The composition and melting point of the prepared nanosilver pastes were measured by XRD and DSC, respectively. Subsequently, nickel(Ni200) alloys were brazed in vacuum with the prepared nanosliver paste, and the impact of brazing temperature on the microstructure and properties of brazed joint were investigated. It can be found in the results that the sintering temperature increase is beneficial to the density improving of the sintered structure in the joint and the interdiffusion between the atoms at the interface, thus enhances the shear strength of the brazed joints. Howe-ver, excessively high temperature will lead to a slight drop in the property of joints. The brazed joints present a maximum shear strength of 42.5 MPa at 850 ℃, which is about 912% higher than that at 300 ℃.

Key words: nanosilver paste vacuum brazing microstructure mechanical property

出版日期: 2019-02-10 发布日期: 2019-02-13

ZTFLH:

TG425.2

基金资助: 国家自然科学基金(51675269);新型钎焊材料与技术国家重点实验室开放课题基金(SKLABFMT201704)

作者简介: 温丽,2017年6月毕业于南京航空航天大学,获得工学学士学位。薛松柏,南京航空航天大学材料科学与技术学院二级教授、研究员、博士研究生导师,享受政府特殊津贴专家。长期以来专注于焊接材料及焊接工艺的研究,制定五项国家标准、五项机械工业部行业标准并发布实施;主持完成了三十多项国家、部、市课题的研究,共取得主要科研成果三十余项。xuesb@nuaa.edu.cn

引用本文:

温丽, 薛松柏, 马超力, 龙伟民, 钟素娟. 钎焊温度对纳米银焊膏真空钎焊Ni200合金接头组织与性能的影响[J]. 材料导报, 2019, 33(3): 386-389.
WEN Li, XUE Songbai, MA Chaoli, LONG Weimin, ZHONG Sujuan. Impact of Brazing Temperature on Microstructure and Mechanical Properties ofNi200 Alloys Joints by Vacuum Brazing Using Nanosilver Pastes. Materials Reports, 2019, 33(3): 386-389.

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