颗粒增强超高分子量聚乙烯基复合材料磨粒磨损的特性与机理

Characteristics and Mechanism of Abrasive Wear of Particle ReinforcedUHMWPE Matrix Composites

为了改善地面机械触土部件的减粘脱土状况，制备了石英砂颗粒增强超高分子量聚乙烯基复合材料，并对其磨粒磨损性能作了试验研究．运用正交试验方法分析了磨料粒度、载荷和速度及这三者的交互作用对材料耐磨性的影响，得出了回归方程．结果表明，载荷对纯超高分子量聚乙烯磨损的影响最大，载荷越高，磨损越严重；在颗粒增强复合材料体系中，磨料粒度对磨损的影响最大．这表明引入硬质点提高材料表层的硬度和抗犁切能力是耐磨性提高的主要原因．

The abrasive wear of UHMWPE matrix composites reinforced by quartz sand was investigated and analyzed by using pinondisc tester. A statistical analysis was carried out to develop a regressive equation in which the wear volume of the specimen during abrasive process was expressed as the load, abrasive particle size, sliding velocity and their interaction. The results show that the load is the most important factor determining the abrasive loss of UHMWPE; whereas, for the quartz sand reinforced UHMWPE matrix composite specimen, the effect of load is minor as compared with the abrasive particle size. Results also show that with addition of hard quartz sand particle, the hardness and plowing resistance is enhanced, thus leading to increase of abrasive resistance.