Submerged arc welding method with multiple electrodes for steel material
US8785806B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2009 |
| Grant date | Jul 22, 2014 |
| Priority date | — |
| Expiry date | Sep 11, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Steel is subjected to multiple-electrode submerged arc welding with three or more electrodes in which a direct-current power source is used to supply current to a first electrode, the welding by the first electrode is carried out at a current density of 250 A/mm2 or more, preferably with a wire diameter of 3.2 mm or less and a weld current of 1,000 A or more, the welding by the second electrode is carried out at a current density of 150 A/mm2 or more, preferably with a weld current of 600 A or more, one of the interelectrode spacings is 23 mm or more on a surface of the steel, and the remaining interelectrode spacings are 20 mm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.