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在HT-1000型高温摩擦磨损试验机上对M42高速钢的进行干滑动摩擦磨损试验。利用SEM观察并分析摩擦面磨损形貌及磨损机理。结果表明:M42高速钢在与GCr15钢配副干摩擦条件下,随着摩擦速度的增加,摩擦系数先降低后升高再降低;当摩擦热累积达到一定值后,摩擦表面产生严重塑性变形和化学变化,摩擦副表面起初产生氧化磨损、粘着磨损、磨粒磨损和犁沟磨损,形成转移润滑膜。此时摩擦系数较低,但磨损率相对又有所回升。
Dry sliding friction and wear test of M42 high speed steel was carried out on HT-1000 high temperature friction and wear tester. The wear morphology and wear mechanism of friction surface were observed and analyzed by SEM. The results show that the friction coefficient of M42 high-speed steel decreases firstly and then increases and then decreases with the increase of friction speed under the condition of the secondary dry friction with GCr15 steel. When the friction heat accumulates to a certain value, the friction surface produces serious plastic deformation and Chemical changes, the friction surface initially produced oxidative wear, adhesive wear, abrasive wear and furrow wear, the formation of transfer lubrication film. At this time, the friction coefficient is lower, but the wear rate is relatively increased again.