球磨时间对TiVCN基金属陶瓷组织和性能的影响  

Effect of Milling Time on Microstructure and Properties of TiVCN-based Cermets

作　　者：陈敏[1] 肖玄[1] 张雪峰[1] 仁杰[1] 许恒新 

机构地区：[1]攀枝花学院材料工程学院,四川攀枝花617000

出　　处：《硬质合金》2015年第6期384-389,共6页Cemented Carbides

基　　金：四川省应用基础研究项目(2014JY0132);攀枝花市创新人才培养项目(2015TX-11);攀枝花市科技支撑项目(No.2015CYG-18;No.2013CY-G-7;No.2014CY-G-26-1)

摘　　要：以VC、TiN为硬质相及Co、Ni、Mo为粘结相真空烧结制备了TiVCN基金属陶瓷。结合XRD、SEM&EDS、密度以及力学性能测试,研究了球磨时间对TiVCN基金属陶瓷显微组织和力学性能的影响。结果表明:随着球磨时间从36 h延长至144 h,TiVCN基金属陶瓷的混合粉料物相没有发生变化。高温烧结后硬质相基体主要为立方相TiVCN,粘结相衍射峰向低角度方向偏移,形成多相固溶体。当球磨时间从36 h延长至108 h,TiVCN基金属陶瓷的密度、硬度和抗弯强度呈上升趋势。球磨时间超过72 h后显微组织中粘结相比例增加,组织细化。当球磨时间延长至144 h时显微组织中硬质相比例降低,综合力学性能下降。TiVCN-based cermets were sintered in vacuum with VC, TiN as carbides and Co, Ni, Mo as binder. The effects of milling time on microstmcture and mechanical properties of TiVCN-based cermets were investigated by XRD, SEM, EDS, density and mechanical properties tests. Results show that when the milling time is increased from 36 h to 144 h, there is no change among the phases of raw material mixtures. After high temperature sintering, the major carbide is TiVCN and the binder diffraction peaks shift to lower angles with different solid solutions. When the milling time is increased from 36 h to 108 h, the properties of density, hardness and blending strength of TiVCN-based eermets show rising trends. The ratio of binder phase increases and the microstructure is refined with milling time higher than 72 h. When the milling time is increased to 144 h, the ratio of carbides decreases and the comprehensive properties are declined.

关 键 词：球磨时间 TiVCN 显微组织 力学性能 

分 类 号：TG148[一般工业技术—材料科学与工程]