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对不同淬火、回火温度与不同磨损条件下的铸造汽车覆盖件模具钢进行了磨损试验,研究磨损率与回火温度、摩擦参数等因素的关系,观察摩擦表面的显微组织和摩擦学性能.结果表明:试验用模具钢材料的耐磨性能与材料的硬度有一定关系,与淬火、回火温度有很大关系,更与磨损过程中加载载荷、滑动速率和摩擦距离等因素有关.回火温度对模具钢材料的硬度和耐磨性起到了一定的作用,500℃左右时硬度最大.600℃回火后,组织中主要成分变为马氏体与托氏体.在滑动速率较高、回火温度较低时,随着回火温度升高,磨损率降低速度明显;在加载载荷较大、回火温度较低时,随着回火温度的升高,磨损率降低速度明显.不同的滑动速率以及加载载荷情况下的磨损机理主要为黏着磨损和磨粒磨损等两种.
The wear test was conducted on die steel with different quenching and tempering temperatures and under different wear conditions to study the relationship between the wear rate and the tempering temperature and the friction parameters and to observe the microstructure and tribological properties of the friction surface The results show that the wear resistance of the test die steel has a certain relationship with the hardness of the material, and has a great relation with the quenching and tempering temperature, but also with the loading load, sliding speed and friction distance during wear. The temperature of the fire has played a certain role in the hardness and wear resistance of the die steel, and the hardness is the highest when the temperature is up to 500 ℃ .Then the main components in the microstructure become martensite and tortoiseshell after tempering at 600 ℃, When the tempering temperature is low, the wear rate decreases obviously with the increase of tempering temperature. When the loading load is large and the tempering temperature is low, the wear rate decreases obviously with the tempering temperature increasing. The different sliding rates and the wear mechanisms under load are mainly two kinds of adhesive wear and abrasive wear.