通过三轮农用车正时链和传动链道路行驶磨损试验 ,研究了正时链和传动链的磨损机制 ,指出了油润滑条件下正时链的主要磨损机制是疲劳磨损 ,定期刷油或滴油润滑条件下传动链的主要磨损机制是磨粒磨损 ,分析了目前行业内台架磨损检验方法的局限性。通过微观分析阐述了套筒和销轴零件的表面硬度、显微硬度及其梯度、金相组织等对链条耐磨性的影响规律 ,并提出了在不同磨损机制下的摩擦学设计原则 The wear mechanism of timing chain and transmission chain in three-wheeled agricultural vehicles was studied. The wear mechanism of timing chain and transmission chain was studied. The main wear mechanism of timing chain under the condition of oil lubrication was fatigue wear, regular brushing or dropping The main wear mechanism of the transmission chain under the condition of oil lubrication is abrasive wear, and the limitations of the present test methods for the wear of the bench in the industry are analyzed. Through the microscopic analysis, the influences of surface hardness, microhardness and its gradient, microstructure and so on on the wear resistance of the chain were expounded, and the principle of tribology design under different wear mechanisms