芳纶纤维增强酚醛树脂摩擦材料的磨损机理研究

对芳纶增强酚醛树脂摩擦材料在模拟制动工况下的磨损机理进行了系统的实验研究，结果表明：在试验工况下，两种摩擦材料在与铸铁偶件对摩时均呈现粘着磨损和塑性变形特征；在高速和高压条件下塑性变形加剧，摩擦材料磨损表面可见熔融迹象；摩擦副接触表面发生材料的相互转移，两种摩擦材料均可在偶件表面形成转移膜，且在高速和高压条件下转移膜更易形成；Kevlar纤维作为增强相可以有效地提高摩擦材料的摩擦稳定性，并降低摩擦系数；摩擦材料的磨损机理主要为擦伤作用、粘着磨损和塑性变形。

Wear Mechanisms of Kevlar Pulp Reinforced Phenolic Resin Friction Materials

The wear mechanisms of two kind Kevlar fiber reinforced phenolic resin frictional materials were investigated by scanning electron microscopic observation of the worn surface morphologies and energy dispersive X ray microanalysis of the compositions of the worn surfaces. As the results, the two kind frictional materials in sliding against cast iron counterpart show signs of adhesion wear and plastic deformation. The plastic deformation is accelerated at high sliding speed and normal load, which is accompanied by localized melting on the worn surfaces of the frictional materials. The inter transfer between the frictional materials and the cast iron counterpart is also observed and a transfer film of the frictional materials is formed on the counterpart surface. It is easier for the transfer films of the frictional materials to form at higher sliding speed and normal load. Kevlar fiber as the reinforcing agent helps to stabilize and lower the friction coefficient. The frictional materials is characterized by slight scuffing, adhesion, and plastic deformation, in sliding against the cast iron counterpart.