纸基摩擦材料与不同含碳量钢配副之间的摩擦学性能及其失效机理研究

采用湿法成型辅助热压工艺制备了纸基摩擦材料. 分别考察了纸基摩擦材料在无油状态和富油状态下与不同碳含量钢配副材料的摩擦适配性，并通过磨损表面形貌分析和探讨了其在无油状态下的失效机理. 结果表明:在无油状态下，随配副材料硬度增高，纸基摩擦材料的摩擦系数下降，摩擦稳定性提升，磨损率降低，高硬度的65Mn钢与纸基摩擦材料的适配性较好. 纸基摩擦材料在无油状态下主要表现为由疲劳裂纹引发的纤维脱粘与拔出导致的材料失效. 在富油状态下，配副材料的硬度对纸基摩擦材料的摩擦性能无显著影响，润滑油膜和摩擦膜的形成能有效减轻对配副材料的微观切削作用，从而抑制材料的磨损. 

Tribological Performance and Failure Mechanism of Paper-Based Friction Materials Sliding against Steels of Different Carbon Contents

Paper-based friction material was prepared by wet-forming assisted hot-pressing process. The compatibility of steel pairs with different carbon contents and paper-based friction materials in oil-free state and oil-rich state was investigated, respectively. The friction mechanism in oil-free and oil-rich state was also discussed through wear surface analysis. Results showed that in the oil-free state, as the hardness of the matching material increased, the friction coefficient of the paper-based friction material decreased, the friction stability increased, and the wear rate decreased. The 65Mn steel with high hardness had better compatibility with paper-based friction materials. The failure mode of paper-based friction material in the oil-free state was fiber debonding and pulling-out caused by fatigue cracks. In the oil-rich state, the hardness of the steel had no significant effect on the tribological properties of the paper-based friction material. The formation of oil film and friction film effectively reduced the micro-cutting effect on the material, and hereby reduced the wear of the material.