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US 2010/0058592 A1Published application
Method for hardening running surfaces of roller bearing components
AssigneeSchaeffler KG
InventorsEdgar STREIT, Oskar BEER
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Abstract
The invention relates to a method for hardening running surfaces of roller bearing components, in particular outer bearing rings. In order to provide the edge area (functional layer) of the roller bearing components with a deep layer which is particularly hard and resistant to corrosion, the roller bearing component undergoes nitration for a long period of time at a temperature of between 450 and 650° C. and for at least 25 hours. During said treatment no carburizing and subsequently no quenching takes place.
Claims8
A method for hardening running surfaces of a rolling bearing component, comprising:
- long term nitriding the rolling bearing component at a temperature of between 450° C. and 650° C. for a time of at least 25 hours, wherein no carburizing takes place during this treatment and no quenching subsequently takes place.
Dependencies are inferred from the claim text.