Gd改性Ni-Cr钎料钎焊金刚石组织和性能研究  

Study on Microstructure and Properties of Diamond Brazed with Gd Modified Ni-Cr Filler Metal

作　　者：徐东[1,2] 金天 王朋波 程战 XU Dong;JIN Tian;WANG Pengbo;CHENG Zhan(School of Materials Science and Engineering,Anhui Polytechnic University,Wuhu 241000,Anhui,China;State Key Laboratory of Advanced Brazing Filler Metals and Technology,Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou 450001,China)

机构地区：[1]安徽工程大学材料科学与工程学院,安徽芜湖241000 [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

出　　处：《材料导报》2024年第19期177-181,共5页Materials Reports

基　　金：国家自然科学基金(52271017);安徽省重点研究与开发计划(2022i01020008)。

摘　　要：本研究旨在减少钎焊金刚石的热损伤,提高钎焊金刚石的力学性能。采用Gd改性的Ni-Cr合金钎料,在1080℃保温5 min对金刚石进行真空感应钎焊试验,并利用SEM、EDS及XRD对钎料的微观组织和金刚石焊后界面微结构进行测试分析。结果表明,Gd的添加提高了Ni-Cr合金钎料的力学性能,钎料中生成了两种新的稀土化合物(Gd_(2)Ni_(17)和GdNi_(5))。添加适量的Gd可提高金刚石的出露度,且钎焊接头中生成的新型Gd_(2)Ni_(17)化合物有利于减少钎焊金刚石的热损伤。此外,当Gd的添加量为0.8%时,金刚石的暴露量达到其自身高度的62.1%,力学性能测试证实使用该钎料钎焊的金刚石的静压强度和磨削性能高于使用纯镍铬合金钎焊的钻石。The goal of this research is to prevent heat damage to brazed diamond and improve its mechanical performance.The vacuum induction brazing diamond test was performed at 1050℃for 5 minutes with a Gd modified Ni-Cr alloy filler metal.The SEM,EDS,and XRD were used to test and characterize the microstructures of the filler metal and the interface following diamond welding.The results reveal that adding Gd enhances the mechanical characteristics of Ni-Cr alloy solder and forms two novel rare earth compounds(Gd_(2)Ni_(17)and GdNi_(5)).The addition of appropriate amount of Gd can improve the exposure of diamond,and the new Gd_(2)Ni_(17)compound in the brazed joint is beneficial to reduce the thermal damage of brazed diamond.In addition,when the Gd content is 0.8%,the exposure amount of diamond reaches 62.1%of its own height.The mechanical property test confirms that the static pressure strength and grinding performance of diamond brazed with this filler metal are higher than that of diamond brazed with pure Ni-Cr alloy.

关 键 词：钎焊金刚石 Ni-Cr钎料 磨削性能 热损伤 

分 类 号：TG454[金属学及工艺—焊接]