Method for manufacturing high strength rail of excellent weldability
US4426236A · kind A · utility
5Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1982 |
| Grant date | Jan 17, 1984 |
| Priority date | — |
| Expiry date | Jan 18, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S148/902
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for manufacturing high strength rail having excellent weldability comprises subjecting a steel rail of specific composition to specific heat treatment conditions at the surface layer portion of the head thereof, to impart high strength to the rail and to assure that the welded portion as well as the welded heat affected zone are free from deterioration caused by the welding process. The heat treatment conditions include a cooling rate which is substantially equivalent to that in a conventional welding process so as to impart high tensile strength to the treated portion of the rail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.