GM-3摩擦衬垫动态滑移过程中的摩擦机理研究

采用GM-3摩擦衬垫与高强度透明钢化玻璃为摩擦副,在Rtec摩擦磨损试验机上进行往复滑动摩擦试验,使用高速显微摄像仪(VW9000)对接触摩擦界面进行实时原位观测,并利用灰度法计算接触界面的实际接触面积,探究GM-3摩擦衬垫的磨损机理.结果表明:GM-3摩擦衬垫的摩擦系数与实际接触面积呈正相关关系;其初期磨损机理主要为磨粒磨损和黏着磨损,后期为疲劳磨损和黏着磨损;初期磨粒磨损会导致摩擦系数增加;卷筒状磨屑生成过程中摩擦系数变大,随后细小的磨屑聚集尺寸变大,数量变少,摩擦系数趋于稳定.

Friction Mechanism in Dynamic Slide Process of GM-3 Friction Liner

The wear mechanism of GM-3 friction liner was studied using a high-strength transparent toughened glass as the counterpart. The reciprocating friction experiments were conducted on a Rtec friction machine. With the adoption of in-situ observation method(using VW9000 high-speed microscope camera) and the gray-scale method, the real contacting area was calculated. The results of the experiments show that the friction coefficient was proportional to the real conducting area. The wear mechanism in the initial period was abrasive wear and adhesive wear while it was fatigue wear after the initial stage. The initial abrasion wear led to the increase of friction coefficient with the formation of scroll-shaped debris. In the later stage, friction coefficient tended to be stable accompanied by increased size and decreased amount of debris as a result of the aggregation of the small one.