为了探讨离合器摩擦副材料在高温下的摩擦磨损机制,采用30CrSiMoVM钢作为与铜基粉末冶金摩擦片配对使用的对偶钢片,在MMU-10G高温端面摩擦磨损试验机上,研究30CrSiMoVM钢和摩擦片组成的摩擦副在室温到600 ℃之间的摩擦磨损性能.研究结果表明:随着温度升高,材料的强度逐渐降低,摩擦界面氧化膜不断形成与脱落,使摩擦副摩擦因数和磨损量总体趋势逐渐增大.在温度为300~500 ℃时,摩擦副摩擦因数和磨损量均平稳增大,表明摩擦副材料在此温度段摩擦磨损性能较稳定,磨损机制表现为磨粒磨损、氧化磨损和疲劳磨损;在600 ℃时,摩擦副材料表层软化,摩擦片摩擦因数和磨损量急剧增大,对偶钢片因表层黏着磨损严重,相对磨损量较小,磨损机制表现为黏着磨损、氧化磨损和疲劳磨损.%In order to study the friction and wear mechanisms of the clutch friction pair at high temperature, 30CrSiMoVM steel was selected as the dual-steel-disk pairing with the copper based powder metallurgy frictional material, and its friction and wear properties were investigated at the temperatures from room temperature to 600 ℃, through a high temperature wear tester (MMU-10G type). The results show that with the increase of temperature, the strength of friction pair materials decrease gradually and the oxide film coatings are constantly formed and peeled on the contact surface, leading to a gradual increase at the friction coefficient and wear loss of the friction pair. At 300-500 ℃, the friction coefficient and wear loss of the friction pair increase steadily, indicating that the friction and wear properties are stable, and the predominant wear mechanisms are abrasive wear, oxidative wear and fatigue wear. At 600 ℃, the material surface is softened, resulting in a rapid increase at the friction coefficient of friction pair and wear loss of the frictional material. Severe adhesive wears occur on the dual-steel-disk surface, but its relative wear loss remains low, and the dominant wear mechanisms are adhesive wear, oxidative wear and fatigue wear.
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