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US 8,273,188 B2Granted
Constant velocity universal joint component and manufacturing method thereof
AssigneeNtn Corporation
InventorKazuhiko Yoshida
Life of this patent
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Abstract
In a constant velocity universal joint component and a manufacturing method thereof capable of achieving increased strength without significant procedural changes, and that can contribute to size reduction and weight reduction, a sharp-angled portion 15 is formed by machining after cold plastic working is applied. A carburization process is then performed in which surface carbon concentration of 0.45 mass % to less than 0.60 mass % is obtained. Quenching is then performed. High-frequency induction hardening is subsequently performed.
Claims1
A manufacturing method of a constant velocity universal joint component, said method comprising:
- forming the component by machining after cold plastic working is applied;
- after said forming of the component, performing a carburization process in which a surface carbon concentration of 0.45 mass % to less than 0.60 mass % is obtained in a surface of the component;
- quenching the component after said performing of the carburization process;
- and
- after said quenching, performing induction hardening of the component.
2 more elements
Dependencies are inferred from the claim text.