制动条件对动车进口刹车片制动性能的影响
Effect of Braking Conditions on Braking Performance of Import Brake Pads in Electric Multiple Unit
高 鸣, 陈 跃, 张永振, 展雪梅
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作者单位：(河南科技大学 材料科学与工程学院, 河南 洛阳 471003)
中文关键字：制动速度； 摩擦磨损； 磨损机理
英文关键字：braking speed; friction wear; wear mechanism
中文摘要：对现有动车进口刹车材料，在MM-1000Ⅱ型摩擦磨损性能试验机上进行性能测试，摩擦速度为80～200 km/h，摩擦压力为0.4～1.0 MPa。利用JEM-2100型扫描电镜(SEM)对其磨损表面和磨屑进行微观形貌观察。结果表明：当制动速度为160 km/h时，仍具有较高摩擦系数(0.292)，制动速度大于160 km/h时，摩擦系数迅速下降；当制动速度为80 km/h时，材料磨损量较小。低速制动下的磨损机理主要为疲劳磨损，高速制动时主要为磨粒磨损和氧化磨损。
英文摘要：The performance of import brake materials was measured by MM-1000Ⅱ fractional tester, the friction speed is at 80～200 km/h, the friction pressure is 0.4～1.0 MPa. The worn surface of coating and the morphology of wearing debris were observed by JEM-2100 SEM. The results show that, when the initial braking speed is 160 km/h, it still has a high friction coefficient of 0.292, when the braking speed is over 160 km/h, the friction coefficient decreases rapidly. When the braking speed is 80 km/h, the wearing loss of the material is minor. The wearing mechanism of copper-based brake materials mainly is fatigue wear at low brake speed, while abrasive wear and oxidation wear at high brake speed.