Method for selecting rail steel and wheel steel
US11401591B2 · kind B2 · utility
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4Claims
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Key dates
| Filing date | Dec 14, 2016 |
| Grant date | Aug 2, 2022 |
| Priority date | — |
| Expiry date | Apr 23, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D9/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for selecting a rail steel and a wheel steel comprising: selecting a rail steel and a wheel steel to be used as a rail and a wheel on an actual track, respectively, the rail steel and the wheel steel having a specific chemical composition, such that the rail comprises a head portion having a yield strength YSR of 830 MPa or more, the wheel comprises a rim portion having a yield strength YSW of 580 MPa or more, and a ratio YSR/YSW of the yield strength YSR at the head portion of the rail to the yield strength YSW at the rim portion of the wheel falls within a range of: 0.85≤YSR/YSW≤1.95 (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.