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采用UMT-2球-盘式高温摩擦磨损试验机,考察了A l2O3/TiC基陶瓷刀具材料在200℃至600℃范围内的高温摩擦磨损性能,并分别使用大景深显微镜,白光干涉仪和扫描电镜观察试验后磨痕的轮廓和微观形貌.结果表明:A l2O3/TiC陶瓷刀具的摩擦系数随环境温度的升高先升高,在600℃时开始降低,摩擦系数的数值在0.1~0.4之间;磨损量随着摩擦滑动速度的升高而降低,随着摩擦环境温度的升高而升高,磨损量的数值在4×10-7~9×10-7mm3/(N.m)之间;随着摩擦温度的升高,磨痕轮廓两侧具有明显的材料转移现象,A l2O3/TiC陶瓷材料主要磨损机理是裂纹的产生与材料的脱落.
The high temperature friction and wear properties of A l2O3 / TiC-based ceramic tool materials in the temperature range from 200 ℃ to 600 ℃ were investigated by UMT-2 ball-disc high temperature friction and wear testing machine. The effects of large depth of field microscope, white light interferometer and scanning SEM and SEM.The results showed that the friction coefficient of A l2O3 / TiC ceramic tool first increased with the increase of ambient temperature, and then decreased at 600 ℃. The friction coefficient was between 0.1 and 0.4 ; The amount of wear decreases with the increase of the frictional sliding velocity and increases with the increase of the frictional temperature. The values of wear amount are between 4 × 10-7 ~ 9 × 10-7mm3 / (Nm) With the increase of friction temperature, there is a clear material transfer phenomenon on both sides of the wear scar profile. The main wear mechanism of A l2O3 / TiC ceramic material is the generation of cracks and the shedding of materials.