Shielding gas mixture and process for arc welding of stainless steel workpieces
US5739503A · kind A · utility
4Cited by
5References
7Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 22, 1996 |
| Grant date | Apr 14, 1998 |
| Priority date | — |
| Expiry date | Nov 22, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/05
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The shielding gas mixture for the TIG or GTAW arc welding of stainless steels, in particular of duplex or super duplex steels, comprises, in argon, from 3 to 18%, advantageously approximately 10%, of helium and from 1 to 3%, advantageously approximately 2%, of nitrogen. This gas mixture makes it possible to ensure good corrosion resistance of the metal deposited, acceptable solidity of the welds and excellent arc stability, as well as a suitable viscosity of the molten metal appropriate to manual welding in all positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.