Teng Dezhi, Wang Jingsi, Li Chengdi, Sa Xiaoxia
Marine Engineering College, Dalian Maritime University, Dalian 116026, China.
Xinyu Key Laboratory of Materials Technology and Application for Intelligent Manufacturing, Xinyu University, Xinyu 338004, China.
Materials (Basel). 2022 Jun 5;15(11):4010. doi: 10.3390/ma15114010.
A piston skirt friction and wear apparatus that simulates the contact and the relative motion of piston and cylinder liner in a real engine has been designed and constructed. With this apparatus, the friction and wear behavior of a cast aluminum alloy piston with a graphite coating under different loads was studied, and the effectiveness of the apparatus was confirmed. The total wear of the piston skirt was higher under a higher load, and the upper part of the skirt surface (around the height of the piston pin) was worn more severely. The wear mechanisms were studied and, based on the test results and surface analyses, three main wear modes were believed to occur in the wear process of the piston skirt: abrasive, adhesive, and fatigue wear. The effects of skirt profile design, coating, and surface texturing on the friction and wear behavior of the piston skirt can be investigated well using the proposed apparatus, which can truly reflect actual working conditions and is useful to improve the tribological performances of piston skirts.
设计并制造了一种活塞裙部摩擦磨损试验装置，该装置可模拟实际发动机中活塞与气缸套的接触及相对运动。利用该装置，研究了一种带有石墨涂层的铸造铝合金活塞在不同载荷下的摩擦磨损行为，并验证了该装置的有效性。在较高载荷下，活塞裙部的总磨损量更大，裙部表面上部（活塞销高度附近）磨损更为严重。对磨损机制进行了研究，基于试验结果和表面分析，认为活塞裙部磨损过程中主要出现三种磨损模式：磨粒磨损、粘着磨损和疲劳磨损。利用所提出的装置可以很好地研究裙部轮廓设计、涂层和表面纹理对活塞裙部摩擦磨损行为的影响，该装置能够真实反映实际工作条件，有助于提高活塞裙部的摩擦学性能。
