Abstract The tribological characteristics of 6%(TiC + TiB)/Ti–6Al–4V composite against Cr12MoV steel were systematically investigated using a pin-on-disc wear machine in a static temperature range of 25–600 °C. At 25 °C, the wear rate variation was proportional to the load and inverse to sliding speed. Meanwhile, the wear mechanism underwent a transition from delamination and slight oxidative wear at 0.11 m/s to delamination and abrasive wear at 0.22 m/s and then became mainly oxidation wear at 0.33 m/s. At elevated temperatures, the critical temperatures can be found, 300 °C under 300 N and 400 °C under 100 N, respectively. Above critical temperatures, the effect of load on the wear rate was weakened due to the appearance of massive tribo-layers, and the specific wear rates were reduced by roughly an order of magnitude compared with room temperature, furthermore, the coefficients of friction still remained high value without heat attenuation, the main mechanism was mild oxidation wear. The composite exhibited excellent wear resistance due to high strength and the formation of dense and continuous tribo-layer with tribo-oxides, particularly the presence of Fe2O3.

中文翻译：

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(TiC+TiB)/Ti-6Al-4V 复合材料在 25 °C 至 600 °C 范围内的摩擦学特性评估

摘要 在25-600 °C 的静态温度范围内，使用销盘式磨损机系统地研究了6%(TiC + TiB)/Ti-6Al-4V 复合材料与Cr12MoV 钢的摩擦学特性。在 25 °C 时，磨损率变化与载荷成正比，与滑动速度成反比。同时，磨损机制从0.11 m/s的分层和轻微氧化磨损过渡到0.22 m/s的分层和磨粒磨损，然后在0.33 m/s时转变为主要氧化磨损。在升高的温度下，可以发现临界温度分别为 300 N 下 300 °C 和 100 N 下 400 °C。在临界温度以上，由于大量摩擦层的出现，载荷对磨损率的影响减弱，且比磨损率较常温降低约一个数量级，且摩擦系数仍保持较高值，无热衰减，主要机理为轻度氧化磨损。由于高强度和与摩擦氧化物（特别是 Fe2O3 的存在）形成致密且连续的摩擦层，复合材料表现出优异的耐磨性。