WO2000035625A1 - Formiergasgemisch zum schweissnahtschutz beim schutzgasschweissen - Google Patents
Formiergasgemisch zum schweissnahtschutz beim schutzgasschweissen Download PDFInfo
- Publication number
- WO2000035625A1 WO2000035625A1 PCT/EP1999/009193 EP9909193W WO0035625A1 WO 2000035625 A1 WO2000035625 A1 WO 2000035625A1 EP 9909193 W EP9909193 W EP 9909193W WO 0035625 A1 WO0035625 A1 WO 0035625A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- welding
- arc welding
- gas mixture
- forming gas
- gas
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
- B23K35/383—Selection of media, e.g. special atmospheres for surrounding the working area mainly containing noble gases or nitrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
Definitions
- the invention relates to a forming gas mixture for welding protection in inert gas welding, in particular in TIG, MIG, MAG and WPL fusion welding of metals, in particular of differently alloyed steels.
- the weld pool of the workpiece is made from an inert gas, usually argon, by means of a protective gas flow or helium or from a mixture of these two gases before the influences of the atmosphere and the associated quality-reducing effects on the surface of the top and bottom of welds, such as corrosion, pore and / or root and / or tarnishing, to obtain a for The good technical and mechanical properties of the welded joints required to protect the high-quality weld surface on high, low or unalloyed steels.
- metal-active gas welding MAG welding
- the forming gas consisting of a nitrogen-hydrogen mixture is passed directly through the protective gas hose during welding or immediately after welding via sintered metal (follow-up showers, gas showers, Gas chambers) used.
- a hydrogen content of more than 10% contained in the conventional forming gas mixtures currently in use this had to be flared due to the existing risk of deflagration.
- the invention is therefore based on the object to provide a forming gas mixture for weld protection in TIG, MIG, MAG and WPL fusion welding of metals, in particular of differently alloyed steels, which has an oxide-free and smooth nature of the top and bottom of the Guaranteed weld during inert gas welding and also eliminates the risk of deflagration due to its material composition.
- the forming gas mixture according to the invention contains a volume fraction of 50% to 95% Ar; Rest N 2 .
- a forming gas mixture which has been successfully tested in practice in the aforementioned fusion welding processes of metals has a volume fraction of 90% Ar and a volume fraction of 10% N 2 .
- the forming gas flow rates used for fusion welding of metals depend on the design of the gas-storing (e.g. bottles, containers), the gas-carrying (e.g. pipes) and the gas-emitting parts (e.g. chambers, showers, showers) of the welding system. In practice, a forming gas flow rate of 5 l / min to 30 l / min is common for fusion welding of metals.
- the forming gas mixture according to the invention which is to be classified as inert in accordance with the gas standard EN 439, is used in all known and named and particularly advantageous in inert gas welding of chromium-nickel steels (TIG welding) and excludes the risk of deflagration due to the hydrogen component not present in this mixture, which makes a technical / Technological and thus additional costs in fusion welding of metals are avoided.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99964511A EP1146991A1 (de) | 1998-12-11 | 1999-11-26 | Formiergasgemisch zum schweissnahtschutz beim schutzgasschweissen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1998157186 DE19857186A1 (de) | 1998-12-11 | 1998-12-11 | Formiergasgemisch zum Schweißnahtschutz beim Schutzgasschweißen |
DE19857186.0 | 1998-12-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000035625A1 true WO2000035625A1 (de) | 2000-06-22 |
Family
ID=7890738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/009193 WO2000035625A1 (de) | 1998-12-11 | 1999-11-26 | Formiergasgemisch zum schweissnahtschutz beim schutzgasschweissen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1146991A1 (de) |
DE (1) | DE19857186A1 (de) |
WO (1) | WO2000035625A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3770932A (en) * | 1971-06-28 | 1973-11-06 | Union Carbide Corp | Short-circuit inert gas consumable electrode process using additions of 10-14% nitrogen |
US5210388A (en) * | 1991-03-05 | 1993-05-11 | Messer Griesheim Gmbh | Inert gas for tig, mig, mag and plasma welding |
US5306358A (en) * | 1991-08-20 | 1994-04-26 | Haynes International, Inc. | Shielding gas to reduce weld hot cracking |
WO1998022248A1 (en) * | 1996-11-19 | 1998-05-28 | Sumitomo Metal Industries, Ltd. | Method of bonding two-phase stainless steel |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0163379A3 (de) * | 1984-05-31 | 1987-03-25 | Allegheny Ludlum Steel Corporation | Verfahren zum Schweissen Stickstoff enthaltender Legierungen |
-
1998
- 1998-12-11 DE DE1998157186 patent/DE19857186A1/de not_active Withdrawn
-
1999
- 1999-11-26 WO PCT/EP1999/009193 patent/WO2000035625A1/de not_active Application Discontinuation
- 1999-11-26 EP EP99964511A patent/EP1146991A1/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3770932A (en) * | 1971-06-28 | 1973-11-06 | Union Carbide Corp | Short-circuit inert gas consumable electrode process using additions of 10-14% nitrogen |
US5210388A (en) * | 1991-03-05 | 1993-05-11 | Messer Griesheim Gmbh | Inert gas for tig, mig, mag and plasma welding |
US5306358A (en) * | 1991-08-20 | 1994-04-26 | Haynes International, Inc. | Shielding gas to reduce weld hot cracking |
WO1998022248A1 (en) * | 1996-11-19 | 1998-05-28 | Sumitomo Metal Industries, Ltd. | Method of bonding two-phase stainless steel |
Also Published As
Publication number | Publication date |
---|---|
EP1146991A1 (de) | 2001-10-24 |
DE19857186A1 (de) | 2000-06-21 |
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