Rail
US11566307B2 · kind B2 · utility
0Cited by
10References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2019 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | Mar 25, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T30/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a rail that is effective in improving wear resistance and rolling contact fatigue (RCF) resistance. The rail has a metallic structure including a pearlitic structure and a structure other than the pearlitic structure in a surface layer from a surface of a rail head to a depth of at least 0.5 mm, where the pearlitic structure has Vickers hardness of 420 HV or more and 520 HV or less, and the structure other than the pearlitic structure has Vickers hardness of 350 HV or more and 420 HV or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.