Claims
- 1. A fixing of a bearing shaft in a reception bore of a housing, at least one end of the shaft being adapted to be swaged to the reception bore for achieving at least one of a force locking and a positive engagement, and an outer peripheral surface of the shaft having a hardness that is greater than a hardness of ends of the shaft, wherein the entire shaft is at first carbonitrided, quenched and tempered so that a hardness of HV 745-950 (HRC 62-68) is realized, following which, the thus treated shaft is soft annealed to produce a hardness of HV 212-305 (HRB 93-HRC 30), and the outer peripheral surface is then subjected to induction hardening to achieve a final hardness of HV 745-950 (HRC 62-68).
- 2. A shaft claim 1, wherein, after induction hardening, the outer peripheral surface of the shaft comprises fine, well-dispersed spheroidal carbides in a matrix of tempered martensite, with a retained austenite content of 5-25%.
- 3. A shaft of claim 1 having a solid configuration.
- 4. A shaft of claim 1, wherein at least a region of the ends of the shaft has a hollow cylindrical configuration.
- 5. A shaft of claim 1 used for mounting a roller in an actuating lever of a valve train of an internal combustion engine.
- 6. A shaft of claim 1 used for mounting a planetary pinion in an automatic transmission of an automotive vehicle.
PRIOR APPLICATIONS
[0001] This application claims the benefit of Provisional Application Serial No. 60/391,818 filed Jun. 27, 2002.
Provisional Applications (1)
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Number |
Date |
Country |
|
60391818 |
Jun 2002 |
US |