碳添加量对TiC基金属陶瓷组织与性能的影响  

Effects of carbon additive amount on the microstructure and properties of TiC-based cermets

作　　者：姚松松 成会朝 范景莲[1] 刘涛[1] YAO Songsong;CHENG Huichao;FAN Jinglian;LIU Tao(Powder Metallurgy Research Institute, Central South University, Changsha 410083, China)

机构地区：[1]中南大学粉末冶金研究院,长沙410083

出　　处：《粉末冶金材料科学与工程》2018年第6期569-574,共6页Materials Science and Engineering of Powder Metallurgy

摘　　要：以TiC粉、Mo粉、WC粉和Ni粉为原料,分别添加0,1%,2%和3%(质量分数)的C粉,制备TiC-WC-Ni-Mo金属陶瓷,研究碳添加量对TiC基金属陶瓷组织与性能的影响。结果表明,TiC基金属陶瓷为典型的由金属粘结相和陶瓷相组成的黑芯灰壳结构,芯部的主要成分为Ti C,壳相由Ti、W、Mo等元素组成。随碳添加量增加,金属陶瓷的晶粒度变小,但孔隙率增加,壳相变薄,材料硬度下降,抗弯强度先增加后降低。碳添加量为2%时,材料的抗弯强度达到最大值,为1 061 MPa,维氏硬度为14.29 GPa。Using TiC powder,Mo powder,WC powder,and Ni powder as raw materials,0,1%,2%,and3%(mass fraction)of C powder were respectively added to prepare TiC-WC-Ni-Mo cermets,and the effects of C additive amount on the microstructure and properties of TiC based cermets were studied.The results show that the TiC-based cermets shows a typical black-core and grey-rim structure the main component of the core is TiC,and the rim is composed of Ti,W,Mo and other elements.With the increase of C additive amount,the grain size of the cermets decreases,but the porosity increases,the rim becomes thinner,the hardness of the material decreases,and the bending strength increases first and then decreases.When the C additive amount is2%,the bending strength of the material reaches the maximum value of1061MPa,and the hardness is14.29GPa.

关 键 词：碳含量 TIC基金属陶瓷 抗弯强度 显微组织 显微硬度 

分 类 号：TG148[一般工业技术—材料科学与工程]