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采用MG-2000高温磨损试验机对45钢进行了干摩擦条件下的磨损试验,研究了该钢的摩擦磨损行为及磨损机制。结果表明:氧化层在磨损中起到决定性作用;氧化层的形成使得材料磨损率降低,磨损机理从粘着磨损转变为氧化轻微磨损;随环境温度和载荷增加,摩擦表面闪温升高,有利于氧化层的形成;氧化层的形成又促使闪温进一步升高,材料塑性变形及热软化加剧,磨损表面氧化膜剥落,磨损率快速提高,最终由轻微磨损转变为严重磨损。
The wear test of 45 steel under dry friction condition was carried out by using MG-2000 high temperature abrasion testing machine. The friction and wear behavior and wear mechanism of the steel were studied. The results show that the oxide layer plays a decisive role in the wear. The formation of oxide layer reduces the material wear rate and the wear mechanism changes from adhesive wear to slight oxidation wear. With the increase of ambient temperature and load, the flashover temperature of the friction surface increases, which is in favor of The formation of oxide layer further promotes the flashover temperature. The plastic deformation and thermal softening of the material are aggravated. The oxide film on the worn surface is exfoliated and the wear rate increases rapidly, which eventually changes from slight wear to severe wear.