烧结方式对WCoB-TiC复相金属陶瓷微观组织及力学性能的影响  

Effect of sintering method on microstructure and mechanical properties of WCoB-TiC composite cermets

作　　者：王盼[1] 潘应君[1] 徐源源[1] 柯德庆[1] 黄辽 

机构地区：[1]武汉科技大学材料与冶金学院,湖北武汉430081

出　　处：《武汉科技大学学报》2017年第5期374-378,共5页Journal of Wuhan University of Science and Technology

基　　金：武汉科技大学省部共建耐火材料与冶金国家重点实验室青年基金资助项目(2016QN18)

摘　　要：以WC、TiB2、Co、VC和Cr3C2粉末为原料,采用热压原位反应液相烧结和真空原位反应液相烧结技术,在1400℃烧结炉中制备WCoB-TiC复相金属陶瓷,利用SEM、XRD对两种烧结方式下制备的WCoB-TiC复相金属陶瓷进行表征,并分析其耐磨性和抗弯强度等性能。结果表明,与真空原位反应液相烧结方式相比,热压原位反应液相烧结方式能更好地促进WCoB-TiC复相金属陶瓷晶粒分布均匀且细化晶粒、降低材料的孔隙率,有效提高材料的耐磨性和抗弯强度,增强其力学性能。With WC,TiB2,Co,VC and Cr3C2 powder as raw materials,by applying liquid-phase in-situ reaction sintering in hot-pressing technique and liquid phase in-situ reaction sintering in vacuum technique,WCoB-TiC composite cermets were prepared in furnace at 1400 ℃.SEM and XRD techniques were applied to characterize WCoB-TiC composite cermets prepared by two sintering methods.At the same time,abrasion resistance,bending strength,etc.of WCoB-TiC composite cermets were studied.The results show that,compared with the vacuum sintering,hot pressing sintering can promote uniform grain distribution and grain refinement of WCoB-TiC composite cermet,reduce the porosity,improve the wear resistance and bending strength effectively,and enhance mechanical properties of the material.

关 键 词：WCoB-TiC 热压烧结 真空烧结 液相烧结 细化晶粒 微观组织 力学性能 

分 类 号：TG148[一般工业技术—材料科学与工程]