SiC纳米线对Ni-Cr-P钎料及Ni-Cr-P/Q235焊点组织与性能影响  

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

作　　者：张亮 龙伟民 Zhang Liang;Long Weimin(School of Materials Science and Engineering,Xiamen University of Technology,Xiamen 361024,China;Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd,Zhengzhou 450001,China)

机构地区：[1]厦门理工学院材料科学与工程学院,福建厦门361024 [2]郑州机械研究所有限公司,河南郑州450001

出　　处：《稀有金属材料与工程》2023年第5期1549-1554,共6页Rare Metal Materials and Engineering

基　　金：Fujian Provincial“Minjiang Scholar”Distinguished Professor Talent Plan Project。

摘　　要：采用具有优良高温强度、高热导率、高耐磨性能和耐腐蚀性能的SiC纳米线为Ni-Cr-P钎料的添加物,研究了钎料/焊点的组织与性能。结果表明,钎料的组织由Ni(Cr)固溶体、Ni3P固溶体以及Ni(Cr)和Ni3P共晶组织组成,微量的SiC纳米线可以显著细化基体组织,使焊点抗剪切强度提高29.6%。SiC纳米线的添加使钎料的熔化温度提高约4℃,显著促进钎料在Q235基板表面的润湿性,增幅达到12.5%。然而,过量添加SiC纳米线会显著粗化基体组织,降低钎料的润湿性和焊点的抗剪切强度。在不同SiC含量的Ni-Cr-P钎料中,Ni-Cr-P-0.1SiC钎料/焊点具有明显的优越性。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℃ 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.

关 键 词：SIC纳米线 抗剪切强度 润湿性 钎料 

分 类 号：TG454[金属学及工艺—焊接]