芳纶浆粕含量对低树脂基刹车片摩擦磨损性能的影响

Influences of Aramid Pulp Content on Friction-Wear Performances of Low Resin-based Brake Pads

通过模压法制备混杂纤维增强低含量改性酚醛树脂基刹车片试样,探究不同芳纶浆粕含量对低树脂基刹车片摩擦磨损性能和主要磨损机制的影响。结果表明,芳纶浆粕能显著提升低树脂基刹车片的抗热衰退性能,提高热衰退发生温度;在高温区间(≥200℃),芳纶浆粕能增强摩擦层强度,吸附磨屑,有效降低磨损率;芳纶浆粕含量不同会改变低树脂基刹车片的主要磨损机制,芳纶浆粕质量分数为0%和1%的试样主要磨损机制为扩展性的表面疲劳磨损,芳纶浆粕质量分数为2%的试样主要磨损机制为非扩展性的表面疲劳磨损,芳纶浆粕质量分数为3%的试样主要磨损机制为黏着磨损。

Hybrid fibers reinforced low content modified phenolic resin-based brake pads were prepared by compression molding method.The influences of different aramid pulp content on friction-wear performances and main wear mechanism of the low resin-based brake pads were studied.The results show that the thermal fade resistance of the low resin-based brake pad is improved significantly by aramid pulp and the temperature at which thermal fade occurs is also improved.At high temperature range(≥200℃),the strength of friction layer is enhanced by aramid pulp,the wear rate is effectively reduced by adsorbing abrasive debris.The main wear mechanism of the low resin-based brake pads varies with aramid pulp content.The main wear mechanism of the brake pads with 0% and 1% aramid pulp is expandable surface fatigue wear,that of the brake pad with 2% aramid pulp is non-expandable surface fatigue wear,and that of the brake pad with 3% aramid pulp is adhesive wear.