3P固溶體以及Ni(Cr)和Ni3P共晶組織組成，微量的SiC納米線可以顯著細化基體組織，使焊點抗剪切強度提高29.6%。SiC納米線的添加使釬料的熔化溫度提高約4 ℃，顯著促進釬料在Q235基板表面的潤濕性，增幅達到12.5%。然而，過量添加SiC納米線會顯著粗化基體組織，降低釬料的潤濕性和焊點的抗剪切強度。在不同SiC含量的Ni-Cr-P釬料中，Ni-Cr-P-0.1SiC釬料/焊點具有明顯的優(yōu)越性。"/>

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SiC納米線對Ni-Cr-P釬料及Ni-Cr-P/Q235焊點組織與性能影響
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1.廈門理工學院 材料科學與工程學院，福建 廈門 361024;2.鄭州機械研究所有限公司，河南 鄭州 450001

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Effect of SiC Nanowires on Microstructures and Properties of Ni-Cr-P Filler Metal and Ni-Cr-P/Q235 Brazed Joints
Author:
Affiliation:

1.School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China;2.Zhengzhou Research Institute of Mechanical Engineering Co., Ltd, Zhengzhou 450001, China

Fund Project:

Fujian Provincial “Minjiang Scholar” Distinguished Professor Talent Plan Project

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    摘要:

    采用具有優(yōu)良高溫強度、高熱導率、高耐磨性能和耐腐蝕性能的SiC納米線為Ni-Cr-P釬料的添加物，研究了釬料/焊點的組織與性能。結果表明，釬料的組織由Ni(Cr)固溶體、Ni3P固溶體以及Ni(Cr)和Ni3P共晶組織組成，微量的SiC納米線可以顯著細化基體組織，使焊點抗剪切強度提高29.6%。SiC納米線的添加使釬料的熔化溫度提高約4 ℃，顯著促進釬料在Q235基板表面的潤濕性，增幅達到12.5%。然而，過量添加SiC納米線會顯著粗化基體組織，降低釬料的潤濕性和焊點的抗剪切強度。在不同SiC含量的Ni-Cr-P釬料中，Ni-Cr-P-0.1SiC釬料/焊點具有明顯的優(yōu)越性。

    Abstract:

    SiC nanowires with excellent high temperature strength, high thermal conductivity, high wear resistance, and high corrosion resistance were adopted as additive into the Ni-Cr-P filler metal. The microstructures and properties of filler metal/brazed joints were studied. Results show that the microstructure of filler metal is composed of Ni(Cr) solid solution, Ni3P intermetallic compound phase, and Ni(Cr)+Ni3P eutectic structure. A small amount of SiC nanowire can refine the matrix microstructure and improve the shear strength of brazed joints by 29.6%. The addition of SiC nanowire can increase the melting temperature of filler metal by about 4 °C and significantly enhance the wettability of filler metals on steel substrate by 12.5%. However, excessive addition of SiC nanowire can significantly coarsen the matrix microstructure, reduce the wettability of filler metal, and decrease the shear strength of brazed joints. Among the Ni-Cr-P filler metals with different SiC contents, Ni-Cr-P-0.1SiC filler metal/brazed joint shows the obvious superiority.

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張亮,龍偉民.SiC納米線對Ni-Cr-P釬料及Ni-Cr-P/Q235焊點組織與性能影響[J].稀有金屬材料與工程,2023,52(5):1549~1554.[Zhang Liang, Long Weimin. Effect of SiC Nanowires on Microstructures and Properties of Ni-Cr-P Filler Metal and Ni-Cr-P/Q235 Brazed Joints[J]. Rare Metal Materials and Engineering,2023,52(5):1549~1554.]
DOI：10.12442/j. issn.1002-185X.20220857

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  • 收稿日期:2022-10-31
  • 最后修改日期:2022-12-14
  • 錄用日期:2023-01-05
  • 在線發(fā)布日期: 2023-05-31
  • 出版日期: 2023-05-29