Process and device for hardening a rail
US6432230B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2000 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Sep 20, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2221/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Process and device for hardening a rail. The process for hardening a rail or part thereof by transforming it from an austenitic structure into a different microstructure that is stable at room temperature comprises aligning, horizontally positioning, and fixing in axial alignment to secure against bending, the rail in its austenitic state; andwhile keeping the rail fixed in axial alignment and secured against bending, force-cooling the rail or part thereof to allow the austenitic structure to be transformed into said different microstructure. The device for hardening a rail or part thereof by force-cooling comprises a support for supporting the rail; a cooling device for force-cooling the rail or part thereof; and at least two fixing devices for axially aligning and securing the rail against bending during the force-cooling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.