The results shown that the main wear mechanism of automotive engine chain was form, extend and flaking of crack for top layer of pin and bush.

• 结果表明 ,汽车发动机正时链的主要磨损机制是疲劳磨损 ,销轴、套筒零件表面的裂纹生成、扩展与剥落是其主要磨损失效机理。