Method of field welding head-hardened rails
US4556164A · kind A · utility
2Cited by
6References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 19, 1985 |
| Grant date | Dec 3, 1985 |
| Priority date | — |
| Expiry date | Feb 19, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01B11/50
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of field welding head-hardened rails which includes the steps of gas pressure welding the rails, shearing off excess metal therefrom at the welded portion with a portable welder device, subjecting the railhead of the pressure welded portion of the rails to a subsequent heat treatment with a gas heater device, setting a width of the pressure welded portion to be heated at the time of the subsequent heat treatment with a pair of jigs, and cooling the portion which has undergone the subsequent heat treatment with an air blowing type cooler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.