Plasma or TIG welding or cutting process with a non-oxidizing gas having a low H.sub.2 O and/or O.sub.2 impurity content
US6069336A · kind A · utility
5Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1999 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Mar 16, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/164
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention relates, on the one hand, to an electric-arc work process, such as a plasma cutting or TIG welding process, in which a torch is supplied with at least one non-oxidizing gas, the said torch being provided with at least one electrode made of pure or alloyed metal, such as a tungsten electrode, characterized in that the said non-oxidizing gas contains a concentration of impurities of the oxygen type [O.sub.2 ] of less than 80 ppmv and a concentration of impurities of the water vapor type [H.sub.2 O] of less than 400 ppmv and, on the other hand, to such a welding gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.