目的 改善刹车片摩擦材料的耐磨性和降低制动噪声。方法 通过正交试验设计摩擦材料配方，利用极差分析法探究混杂纤维对低树脂基摩擦材料性能的影响，并采用扫描电子显微镜观察摩擦材料磨损表面和磨屑的微观形貌，使用能谱仪分析磨屑的元素组成，以研究其磨损机理。结果 混杂纤维增强低树脂基摩擦材料具有良好的耐磨性，其洛氏硬度维持在50~80HRM之间，剪切强度均处于11~16 MPa的适宜范围。随着树脂的质量分数从8%逐渐增加到10%，混杂纤维增强树脂基摩擦材料磨屑中O元素的质量分数降低了33.7%，Cu元素的质量分数降低了20.1%。结论 丁腈胶粉对摩擦材料磨损率的影响最大，铜纤维对摩擦系数的影响最大，且铜纤维在摩擦过程中会在摩擦表面形成一层“转移膜”，可以导出摩擦产生的高热量，从而缓解热衰退。酚醛树脂含量的变化影响摩擦材料的磨损机制，随着树脂含量的增加，摩擦材料由疲劳磨损转变为磨粒磨损。

The work aims to study properties and wear mechanism of low-resin-based friction materials reinforced by hybrid fiber by applying hot-forming process to prepare resin-based friction materials reinforced by copper fiber, aramid fiber and composite mineral fiber, so as to improve wear resistance of friction materials and reduce brake noise. Formulas of friction materials were designed by performing orthogonal experiment, effects of hybrid fiber on properties of low-resin-based friction materials were investigated in the method of range analysis. Microstructures of worn surface and wear debris on the friction materials were observed with scanning electron microscopy (SEM), and elemental composition of the debris was analyzed with energy dispersive spectrometer (EDS) in order to investigate the wear mechanism. The hybrid fiber reinforced low-resin-based friction material exhibited excellent wear resistance, its Rockwell hardness was ranged from 50 to 80HRM, and shear strength was in appropriate range of 11-16MPa. As resin content increased from 8% to 10%, O content of the wear debris on the hybrid fiber reinforced low-resin-based friction material decreased by 33.7% and Cu content decreased by 20.1%. Butadiene-acrylonitrile rubber powder has the maximum impact on wear rate of friction material; copper fiber has the greatest influence on friction coefficient, and copper fiber would form a layer of “transfer film” on the friction surface in friction process, which generates high heat and alleviates heat fade. The change in phenolic resin content affects wear mechanism of friction materials. Wear mechanism transforms from fatigue wear into abrasive wear as resin content increases.