DIFFERENTIAL WITH THIN FILM COATING AT CROSS SHAFT AND PROCESSES FOR MANUFACTURING THE SAME

摘要

A process for improving the durability of a differential (10), where the differential (10) has a pinion shaft (12) and a pinion (13), the pinion shaft (12) having a surface (12a) that contacts the surface of the inner diameter of the pinion (13). The process comprises bonding to the surface of the pinion shaft (12) or the pinion (13) or both, in the region of the interface between the pinion shaft (12) and pinion (13), a coating C having both a lower coefficient of friction and higher seizure resistance than that of the substance of the pinion shaft (12) when in contact with the substance of the pinion (13).