Forged product and crankshaft manufactured from it
US8343255B2 · kind B2 · utility
1Cited by
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16Claims
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Key dates
| Filing date | Jul 20, 2009 |
| Grant date | Jan 1, 2013 |
| Priority date | — |
| Expiry date | Jan 29, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
When the density (DO) of the inclusions whose major axis exceeds 5 μm observed in the axis position of a section perpendicular to the axial direction of a forged product is made 70 nos/cm2 or below and the radius of the forged product is made R, the ratio of the density (DR) of the inclusions whose major axis exceeds 5 μm observed in the R/3 position from the axis position toward the radial direction and the density DO satisfies an inequality (1) below.0.5≦DR/DO≦1.50 (1)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.