Hot forged product with excellent fatigue strength, method for making the same, and machine structural part made from the same
US7806992B2 · kind B2 · utility
2Cited by
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6Claims
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Key dates
| Filing date | Jun 5, 2006 |
| Grant date | Oct 5, 2010 |
| Priority date | — |
| Expiry date | Aug 19, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S148/902
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hot forged product including hardened areas introduced by partial cooling after hot forging, and unhardened areas, wherein Vickers hardness V1 of the hardened areas on the surface and Vickers hardness V2 of the unhardened areas satisfy the following formula (1): (V1−V2)/V2: 0.1 to 0.8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.