Gear having excellent seizing resistance
US9587288B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Mar 29, 2013 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Apr 18, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H55/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This gear has a predetermined chemical composition and has, in a surface-layer part, a texture of tempered martensite and/or tempered bainite and a steel material texture in which retained austenite exists in 1-10% by area percentage and in which a carbide is deposited in at least 5% by area percentage, and the nitrogen content at a depth of 20 μm below the surface is 2.0-6.0%. Thus, a gear that achieves even better seizing resistance in a power transmission part subjected to high rotation and high slippage and using a low-kinematic-viscosity lubricating oil is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.