Mo2C添加量对YG6细晶硬质合金组织结构及性能的影响
Effect of Mo2C Addition Amount on Microstructure and Properties of YG6 Fine-Grained Cemented Carbides
董凯林 1廖军 1时凯华 1刁椿珉 1张钱伟 1江佳阳1
作者信息
- 1. 自贡硬质合金有限责任公司,四川 自贡 643011
- 折叠
摘要
采用传统粉末冶金方法制备了不同Mo2C添加量的YG6细晶硬质合金.通过对合金显微结构的观察及物理力学性能的检测,研究了 Mo2C添加量对YG6细晶硬质合金组织结构及性能的影响.结果表明:随着Mo2C添加量的增加,合金中WC晶粒度逐渐细化并趋于稳定.当合金中Mo2C添加量超过3.5％时,Mo2C对WC晶粒形貌具有球化作用.另外,添加Mo2C会降低合金致密度,合金矫顽磁力随Mo2C含量的增加而逐渐增加.Mo2C添加量为5.0％时,合金综合力学性能最好,其硬度达92.7 HRA,抗弯强度为3 600 MPa,磨粒磨损值为0.81 cm3/(105r).
Abstract
YG6 fine-grained cemented carbides with different amounts of Mo2C were prepared by traditional powder metallurgy method.The influence of Mo2C addition amount on the microstructure and properties of YG6 fine-grained cemented carbides was studied by observing the microstructure and testing the physical and mechanical properties.The results show that with the increase of Mo2C addition,the grain size of WC in the alloy becomes finer and stablizes.When the addition of Mo2C in the alloy exceeds 3.5％,it has sphe-roidizing effect on the morphology of WC grains.In addition,the addition of Mo2C reduces the density of the cemented carbides,while the coercive force increases with the increase of Mo2C content.When Mo2C addition amount is 5.0％,the cemented carbides exhibit the best comprehensive mechanical properties,with hardness of 92.7 HRA,bending strength of 3 600 MPa,and abrasive wear value of 0.81 cm3/(105r).
关键词
硬质合金/Mo2C/组织结构/性能Key words
cemented carbide/Mo2C/microstructure/property引用本文复制引用
出版年
2024
NETL
NSTL
万方数据