PTFE/30CrMnSiNi2A的重载摩擦性能

摘要

The self-lubricating bearings which were made up of PTFE and a ultrahigh strength steel 30CrMnSiNi2A were investigated by numerical simulation and experiments. The failure mode and influence of friction surface on the friction properties were analyzed. The wear mechanism was also studied based on the observation of the worn friction surface. It was found that the failure of self-lubricating bearing is attributed to the damage of lubricating layer,which is improved by excellent friction surface. Owing to the transferred lubricating film made by PTFE fabric, the friction coefficient reduced eventually.%采用PTFE与30CrMnSiNi2A钢制成自润滑轴承,在重载工况下进行了数值模拟及试验分析,研究了自润滑轴承的主要失效形式、摩擦面状态及性能对摩擦性能的影响,并分析了轴承的磨损机理.结果表明:该轴承在重载下以润滑层失效为主要破坏形式,改善摩擦面能够有效提高轴承的摩擦性能；在摩擦过程中PTFE不断被挤出,形成转移润滑膜,起到了减小摩擦因数的作用.