TiC钢结硬质合金表面特性  

Surface characteristics of TiC steel cemented carbide

作　　者：罗军明[1] 徐吉林[1] 邓莉萍[1] 钟震晨[1] 

机构地区：[1]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《材料热处理学报》2014年第2期174-179,共6页Transactions of Materials and Heat Treatment

基　　金：江西省铜钨新材料重点实验室(2011-TW-08);江西省科技攻关项目(2011BBE50010)

摘　　要：选用不同TiC含量的钢结硬质合金在900、1000和1100℃下分别进行30、60、90和120 min抗氧化性能研究;采用CHI电化学工作站分析系统测试不同TiC含量钢结硬质合金在pH=1的H2SO4溶液,pH=7的NaCl溶液和pH=13的NaOH溶液中的极化曲线。结果表明:添加TiC钢结硬质合金比未加TiC的钢结硬质合金抗氧化性能好,其中10%TiC钢结硬质合金抗氧化性最好。随着温度的升高,TiC钢结硬质合金越容易被氧化,其氧化产物主要是Fe2O3,其次还出现了TiO2和Fe2TiO。5%TiC钢结硬质合金表现出耐蚀性能最好,20%的TiC钢结硬质合金耐蚀性能最差。Abstract：Oxidation resistance of the TiC steel-cemented carbide was studied at 900, 1000 and 1100 ℃ for 30, 60, 90 and 120 min, respectively; and potentiodynamic polarization curves Of the cemented carbide in H2SO4 solution, 3.5% NaC1 solution and NaOH solution were investigated by an electrochemical workstation. The results show that the TiC steel-cemented carbide exhibits better oxidation resistance than that of carbon steel without adding TiC, and the 10% TiC steel-cemented carbide has the best oxidation resistance. The oxidation resistance of the TiC steel-cemented carbide decreases with the increasing of temperature, and the oxidation products are mainly composed of F%O3 with a little TiO2 and F%TiO. The 5% TiC steel cemented carbide shows the best corrosion resistance, while the 20% TiC cemented carbide presents the worst corrosion resistance.

关 键 词：TiC含量 钢结硬质合金 表面特性 抗氧化性 极化曲线 

分 类 号：TF124.5[冶金工程—粉末冶金] TM154.3[冶金工程—冶金物理化学]