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US 12,709,781 B2Granted
Method of heat treating a steel component
AssigneeAktiebolaget Skf
InventorsShanjith Raja, Rolando Velazquez, Karl Åke Staffan Larsson
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Abstract
A method of heat treating a steel component includes (i) providing the steel component, (ii) nitriding the steel component at a temperature of 800 to 920° C. and a pressure of 20 to 50 mbar for 30 minutes to 8 hours to form a nitrided steel component, and (iii) after step (ii) heating the nitrided steel component at a temperature of 800 to X° C. and a pressure of 1400 to 3000 mbar for at least 30 minutes, where X° C. is about 80° C. less than a melting temperature of the steel and is preferably about 1250° C. to 1350° C.
Claims17
A method of heat treating a steel component, comprising:
- (i) providing the steel component;
- (ii) nitriding the steel component at a temperature of 800 to 920° C. and a pressure of 20 to 50 mbar for 30 minutes to 8 hours to form a nitrided steel component;
- and
- (iii) after step (ii) heating the nitrided steel component at a temperature of 800 to X° C. and a pressure of 1400 to 3000 mbar for at least 30 minutes, where X° C. is about 80° C. less than a melting temperature of the steel.
1 more element
Dependencies are inferred from the claim text.