Electro-slag welding process for irregular sections
US4413169A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1982 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | Jan 11, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K25/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An electro-slag welding method and apparatus has been developed for butt-joint welding of steel rails or other metallic pieces having irregular cross section, in which the head and the web of the rail is surrounded with a conventional water cooled copper mold and the flange area is surrounded by a ceramic lined crucible. In addition to the conventional single central welding electrode, two or more electrodes are inserted through the lids of the ceramic crucible adjacent the outer ends of the rail flange so as to reduce the total welding current required to produce a complete flange weld and spread the welding energy, thereby reducing excess power and overheating at the central electrode, resulting in better metallurgical quality welds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.