Mo添加对WC-Ni硬质合金微结构及性能的影响  

Effect of Mo Addition on Microstructure and Properties of WC-Ni Cemented Carbides

作　　者：徐涛[1,2] 管一琦 汤梅芳 龙坚战[1,2] 曾瑞霖 崔焱茗 成祥 Xu Tao;Guan Yiqi;Tang Meifang;Long Jianzhan;Zeng Ruilin;Cui Yanming;Cheng Xiang(State Key Laboratory of Cemented Carbide,Zhuzhou Hunan 412000,China;Zhuzhou Cemented Carbide Group Co.,Ltd.,Zhuzhou Hunan 412000,China;State Key Laboratory of Powder Metallurgy,Central South University,Changsha Hunan 410083,China)

机构地区：[1]硬质合金国家重点实验室,湖南株洲412000 [2]株洲硬质合金集团有限公司,湖南株洲412000 [3]中南大学粉末冶金重点实验室,湖南长沙410083

出　　处：《硬质合金》2024年第3期196-205,共10页Cemented Carbides

基　　金：湖南省科技创新计划“揭榜挂帅”制项目(2023ZJ1050);湖南创新型省份建设专项(2023GK2091);株洲市科技重大专项(株科办[2021]53号)。

摘　　要：采用X射线衍射(XRD)、扫描电子显微镜(SEM)和性能检测等方法研究了不同Mo添加量对WC-Ni-Mo硬质合金的WC粒度、硬度、摩擦磨损和耐腐蚀性能的影响。结果表明:在研究的成分范围内(w(Mo)=1.5%~2.0%),WC的平均晶粒尺寸基本不随Mo添加量的变化而变化;随Mo添加量的增加,WC-Ni-Mo硬质合金的硬度略微有所下降,而摩擦磨损性能得到提升。Mo质量分数为2%的WC-Ni-Mo硬质合金在酸性溶液中的耐腐蚀能力要高于Mo质量分数为1.5%的合金,并且具有更好的电化学稳定性。总体来看,WC-8.0%Ni-2.0%Mo合金的综合性能优于WC-8.5%Ni-1.5%Mo硬质合金。The effects of different Mo additions on the WC grain size,hardness,friction and wear,and corrosion resistance of WC-Ni-Mo cemented carbide were investigated by means of X-ray diffraction(XRD),scanning electron microscopy(SEM),and property detection.The results indicate that the average grain size of WC remains basically unchanged within the studied composition range(w(Mo)=1.5%~2.0%)as the Mo addition changes.The hardness of WC-Ni-Mo cemented carbide slightly decreases with the increase in Mo addition,while the friction and wear resistance is improved.The corrosion resistance of WC-Ni-Mo cemented carbide with 2%Mo addition is higher than that of WC-Ni-Mo cemented carbide with 1.5%Mo addition in acid solution,and its electrochemical stability is more favorable.In general,the comprehensive performance of WC-8%Ni-2%Mo alloy is preferable to that of WC-8.5%Ni-1.5%Mo cemented carbide.

关 键 词：WC-NI 硬质合金 Mo添加量 晶粒度分布 摩擦磨损 耐腐蚀性能 

分 类 号：TG135.5[一般工业技术—材料科学与工程]