Method for forming a bearing race for a cylindrical bearing

Details Method for forming a bearing race for a cylindrical bearing Method for forming a bearing race for a cylindrical bearing

2005-09-27

2005-09-27

Bryant, David P. (Department: 3726)

Metal working

Method of mechanical manufacture

Process for making bearing or component thereof

C029S898130, C029S898120, C148S218000, C148S906000

Reexamination Certificate

active

06948247

ABSTRACT:
A cylindrical roller bearing or needle roller bearing for use with a rolling raceway surface is subjected to a carbonitriding treatment to produce a layer containing 30 to 80% retained austenite in the vicinity of its surface that contacts a carburized layer of a rolling raceway surface of a roller bearing. The amount of retained austenite of the surface layer of the roller bearing is increased by about 30%. The surface layer is then heat treated to apply a residual compression stress. The surface then receives surface finishing to produce micro concavo-convex portions in a random direction.

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