c-BN含量对(Ti,W)C/WC/Co金属陶瓷刀具材料力学性能的影响  

Effect of c-BN Content on Mechanical Properties of (Ti,W) C/WC/Co Cermets Tool Materials

作　　者：方斌[1] 李德芃 李祥龙[1] 解传娣[2] 张国强 许崇海[1,3] 衣明东[1] FANG Bin;LI De-peng;LI Xiang-long;XIE Chuan-di;ZHANG Guo-qiang;XU Chong-hai;YI Ming-dong(School of Mechanical and Automotive Engineering,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China;Shandong Key Laboratory of Advanced Manufacturing of Powder Metallurgy,Laiwu Vocational and Teahnical College,Jinan 271100,China;School of Mechanical Engineering,Shandong University,Jinan 250061,China)

机构地区：[1]齐鲁工业大学(山东省科学院),机械与汽车工程学院,济南250353 [2]莱芜职业技术学院,山东省粉末冶金先进制造实验室,济南271100 [3]山东大学机械工程学院,济南250061

出　　处：《人工晶体学报》2019年第12期2323-2329,共7页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51905285);山东省自然科学基金(ZR2016EEP15,ZR2013EEM021);山东省高校科技计划(J16LB03);山东省科技发展计划(2017GGX30136);山东省农业重大应用项目(SD2019NJ015)

摘　　要：采用真空热压烧结工艺制备了(Ti,W)C/WC/c-BN/Co金属陶瓷刀具材料,分析了(Ti,W)C/WC/c-BN/Co金属陶瓷刀具材料的微观结构、元素成分和物相组成,研究了不同含量c-BN对(Ti,W)C/WC/c-BN/Co金属陶瓷刀具材料微观结构和力学性能的影响。研究结果表明:适量添加c-BN能有效细化颗粒,减少气孔等缺陷,提高材料的相对密度,(Ti,W)C/WC/c-BN/Co金属陶瓷刀具材料的断裂模式为穿/沿晶混合断裂模式;当c-BN含量为1wt%时,(Ti,W)C/WC/c-BN/Co金属陶瓷刀具的综合力学性能最优,其抗弯强度、断裂韧性和维氏硬度分别为769.32±10.21 MPa、6.69±0.18 MPa·m^1/2和22.83±0.46 GPa。(Ti,W)C/WC/c-BN/Co cermet tool materials were prepared by vacuum hot pressing sintering.The microstructure,element composition and phase composition of(Ti,W)C/WC/c-BN/Co cermet tool materials were analyzed.The effects of different content of c-BN on the microstructure and mechanical properties of(Ti,W)C/WC/c-BN/Co cermet tool materials were studied.The results show that proper addition of c-BN can effectively refine particles,reduce porosity,increase the relative density of the material,the fracture mode of(Ti,W)C/WC/c-BN/Co cermet tool material is trans-granular/inter-granular mixed fracture mode.When the content of c-BN is 1wt%,(Ti,W)C/WC/c-BN/Co cermet tool material have the best comprehensive mechanical properties,the flexural strength,fracture toughness and Vickers hardness is 769.32±10.21 MPa,6.69±0.18 MPa·m^1/2 and 22.83±0.46 GPa,respectively.

关 键 词：C-BN 金属陶瓷刀具材料 微观结构 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]