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
徐涛 1管一琦 2汤梅芳 3龙坚战 1曾瑞霖 1崔焱茗 1成祥1
作者信息
- 1. 硬质合金国家重点实验室,湖南株洲 412000;株洲硬质合金集团有限公司,湖南株洲 412000
- 2. 中南大学粉末冶金重点实验室,湖南长沙 410083
- 3. 硬质合金国家重点实验室,湖南株洲 412000;株洲硬质合金集团有限公司,湖南株洲 412000;中南大学粉末冶金重点实验室,湖南长沙 410083
- 折叠
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.
Abstract
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Key words
WC-Ni/cemented carbide/Mo addition/grain size distribution/friction and wear/corrosion resistance引用本文复制引用
基金项目
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)
出版年
2024
NETL
NSTL
万方数据