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鍍銅/鎳燒結(jié)釹鐵硼永磁體與DP1180鋼釬焊接頭的組織與性能
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1.吉林大學(xué) 汽車(chē)材料教育部重點(diǎn)實(shí)驗(yàn)室，吉林 長(zhǎng)春 130022;2.吉林大學(xué) 深圳研究院，廣東 深圳 518057;3.上海航天控制技術(shù)研究所，上海 201109

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基金項(xiàng)目:

Creation and Development technology project of Shenzhen, China (NO. 2021Szvup050), Shanghai Sailing Program （No. 23YF1417400）and 2020 Renewal Program of Jilin University (419080520464).


Microstructure and Properties of Soldered Joints of Cu/Ni- Coated Sintered-NdFeB Permanent Magnets and DP1180 Steel
Author:
Affiliation:

1.Key Laboratory of Automobile Materials Ministry of Education, Jilin University, Changchun 130022, China;2.Shenzhen Research Institute of Jilin University, Shenzhen 518057, China;3.Shanghai Aerospace Control Technology Research Institute, Shanghai 201109, China

Fund Project:

Creation and Development Technology Project of Shenzhen, China (2021Szvup050); Shanghai Sailing Program (23YF1417400); 2020 Renewal Program of Jilin University (419080520464)

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    摘要:

    采用Zn-6Sn-5Bi釬料對(duì)鍍Cu/Ni的燒結(jié)NdFeB永磁體和DP1180鋼進(jìn)行釬焊連接，對(duì)比分析了2種鍍層條件下釬焊接頭的微觀組織和力學(xué)性能。結(jié)果表明，對(duì)于鍍Cu的燒結(jié)NdFeB永磁體和DP1180鋼的釬焊接頭，Cu在釬料中擴(kuò)散并與Zn、Fe反應(yīng)生成脆性金屬間化合物，導(dǎo)致釬縫中出現(xiàn)裂紋和孔洞。與無(wú)鍍層時(shí)的燒結(jié)NdFeB永磁體和DP1180鋼的釬焊接頭相比，接頭的剪切強(qiáng)度由61.9 MPa降低至52.3 MPa；對(duì)于鍍Ni的燒結(jié)NdFeB永磁體和DP1180鋼的釬焊接頭，Ni集中分布在NdFeB一側(cè)的界面處，并且由于Sn和Bi的擴(kuò)散形成了不同的擴(kuò)散層，其剪切強(qiáng)度提高至78.1 MPa。

    Abstract:

    Zn-6Sn-5Bi alloy was used to solder DP1180 steel and NdFeB permanent magnet coated with Cu and Ni, and the microstructures and mechanical properties of the soldered joints under different coating conditions were compared and analyzed. Results show that for the soldered joint of sintered NdFeB permanent magnet with Cu coating and DP1180 steel, Cu diffuses in the solder and reacts with Zn and Fe to form brittle intermetallic compounds, resulting in cracks and holes in the soldering seam. The shear strength of the soldered joint of sintered NdFeB permanent magnet with Cu coating and DP1180 steel decreases to 52.3 MPa, compared with that without Cu coating (61.9 MPa). For the soldered joint of sintered NdFeB permanent magnet with Ni coating and DP1180 steel, Ni is concentrated at the interface of NdFeB side, different diffusion layers are formed due to the diffusion of Sn and Bi, and the shear strength of soldered joint increases to 78.1 MPa.

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引用本文

蘇金龍,羅萃,阮野,邱小明,邢飛.鍍銅/鎳燒結(jié)釹鐵硼永磁體與DP1180鋼釬焊接頭的組織與性能[J].稀有金屬材料與工程,2024,53(2):365~370.[Su Jinlong, Luo Cui, Ruan Ye, Qiu Xiaoming, Xing Fei. Microstructure and Properties of Soldered Joints of Cu/Ni- Coated Sintered-NdFeB Permanent Magnets and DP1180 Steel[J]. Rare Metal Materials and Engineering,2024,53(2):365~370.]
DOI：10.12442/j. issn.1002-185X.20230514

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  • 收稿日期:2023-08-21
  • 最后修改日期:2023-09-21
  • 錄用日期:2023-10-07
  • 在線發(fā)布日期: 2024-02-27
  • 出版日期: 2024-02-23