WC-Al_2O_3复合材料摩擦磨损性能

在HT-1000型高温摩擦磨损实验仪上采用球面接触形式对WC-Al_2O_3复合材料进行滑动摩擦磨损实验,研究了WC-Al_2O_3复合材料从常温25℃到600℃温度条件下的摩擦磨损特性,并与WC-6Co进行对比。采用SEM、超景深显微镜及XRD对磨痕表面微观形貌及物相进行观察和分析。结果表明,在常温时,WC-Al_2O_3复合材料的摩擦系数较小,摩擦磨损性能较好。当温度升至600℃时,WC-Al_2O_3复合材料磨痕表面逐渐有氧化物生成,摩擦系数减小,磨损机制由低温下的磨粒磨损为主转化为氧化磨损,WC-Al_2O_3复合材料摩擦磨损性能较差。

Friction and wear properties of WC-Al2O3 composite

Friction and wear properties of WC-Al₂O₃ composite, which slid against WC-6Co, were studied by slide friction and wear experiment of spherical surface contact friction mode on HT-1000 high-temperature friction and wear test instrument within the temperature range of 25℃ to 600℃. In additional, a comparison of WC-Al₂O₃ and WC-6Co was conducted. The micro morphologies of the worn surface and surface composition of the materials were analyzed by SEM, and ultra-depth microscope and XRD. The results show that the friction coefficient of WC-Al₂O₃ composite is smaller and the friction and wear property is better at room temperature. When the temperature increases to 600℃, the oxide formation is accelerated on the surface of WC-Al₂O₃ composite grinding marks, the friction coefficient decreases remarkably. At the same time, wear mechanism change to oxidation wear from abrasive wear, also friction and wear properties are slightly worse.