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采用销盘式高温摩擦磨损试验机,对不同显微组织的4Cr5MoSiV1钢在25℃和400℃下进行了干磨损试验,研究了显微组织对其耐磨性的影响,并探讨了磨损机制。研究结果表明,4Cr5MoSiV1钢在室温下主要为粘着磨损,其耐磨性不仅取决于材料的硬度,还与其断裂抗力有关;400℃时的磨损为氧化磨损,但已超越了Quinn型氧化轻微磨损,其耐磨性取决于材料的硬度、韧性以及热稳定性。室温耐磨组织应具有高的硬度和一定的断裂抗力,而高温耐磨组织应具有高的硬度和热稳定性及一定的韧性。
The wear resistance of 4Cr5MoSiV1 steel with different microstructures was tested at 25 ℃ and 400 ℃ by using the pin-plate high-temperature friction and wear tester. The effect of microstructure on the wear resistance was studied and the wear mechanism was also discussed. The results show that the 4Cr5MoSiV1 steel is mainly adhesive wear at room temperature, its wear resistance depends not only on the hardness of the material, but also on its fracture resistance; wear at 400 ℃ is oxidative wear, but it has surpassed the Quinn-type oxidation wear, Its wear resistance depends on the hardness, toughness and thermal stability of the material. Wear-resistant tissue at room temperature should have high hardness and a certain fracture resistance, and high temperature wear-resistant tissue should have high hardness and thermal stability and a certain degree of toughness.