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US 9,828,664 B2Granted
Method and steel component
AssigneeAktiebolaget Skf
InventorsStaffan Larsson, Walter Datchary, Isabella Flodström, Peter Neuman
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Abstract
A method for heat treating a steel component, the method comprising steps of: (a) carbonitriding the steel component and (b) ferritically nitrocarburizing the steel component.
Claims18
A method for heat treating a steel component the method comprising steps of:
- carbonitriding the steel component in a furnace in the presence of a first concentration of ammonia gas and at least one gas selected from the group consisting of methane, propane and natural gas,
- decreasing the first concentration of ammonia gas to a second concentration of ammonia gas less than the first concentration during the carbonitriding;
- and
- ferritically nitrocarburizing the steel component.
1 more element
Dependencies are inferred from the claim text.