钢纤维含量对汽车摩擦材料性能的影响

Influences of steel fiber content on the performance of automobile brake materials

通过调整摩擦材料基础配方中钢纤维的含量,采用直接混合工艺制备不同组分的摩擦材料,对其进行理化性能、力学性能、摩擦性能及制动噪音测试。结果表明:随钢纤维含量增加,摩擦材料的密度、p H值和洛氏硬度均增大,常温压缩量减小;气孔率先减小,当钢纤维含量超过21%后,气孔率增大;名义摩擦因数(μnom)先略微降低后升高,最低摩擦因数(μmin)、磨损量和噪音发生率均增加,但当钢纤维含量超过21%后,磨损量和噪音发生率明显增加。

By changing the content of steel fiber based on the basic formula, the friction materials with different composite were prepared by directly mixed process. The physical and chemical properties, mechanical properties, tribological properties and brake noise test were completed. The results show that, when steel fiber content increases, the density of the friction material, p H and Rockwell hardness increase; however, the compressibility reduces at room temperature; the porosity firstly decreases and then increases when the steel fiber content is over 21%; μnom slightly decreases and then increases; μmin, the amount of wear and the incidence of noise all increases, but when the steel fiber content is over 21%, the amount of wear and the incidence of noise significantly increase.