TIG welding equipment and TIG welding methods
US7915560B2 · kind B2 · utility
3Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2007 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | May 15, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C26/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The TIG welding methods of the present invention include generating an electric arc between an electrode and an object to weld the object, wherein a first shielding gas including an inert gas flows toward the welded object surrounding the electrode, a second shielding gas containing an oxidative gas flows toward the welded object along a periphery of the first shielding gas, and the concentration of the oxidative gas in the second shielding gas is set such that the oxygen concentration in the welded metal portion of the welded object is within a range of 70 to 220 wt. ppm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.