Fatigue Analysis of Tooth Surface Damage and Fracture for Rear Axle Passive Gear of Truck
In order to find out the reason for the rear axle passive gear being failure,the macro characteristics,micro-morphology,microstructure of the damaged teeth were observed and analyzed.The composition,hardness and carburized layer depth were measured.The results show that the failure reason of passive gear is because the gear bottom has cutting groove in cool work,which leads to the high stress and high cycle fatigue crack,causing the start tooth broken,and thus getting other teeth broken.The less important problem is that the lubricating oil of gear is unwise.