DE10254743A1 - Protective gas for TIG and plasma welding of metallic materials, e.g. high and low alloy steels contains hydrogen, helium and a balance of argon - Google Patents

Protective gas for TIG and plasma welding of metallic materials, e.g. high and low alloy steels contains hydrogen, helium and a balance of argon Download PDF

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Publication number
DE10254743A1
DE10254743A1 DE2002154743 DE10254743A DE10254743A1 DE 10254743 A1 DE10254743 A1 DE 10254743A1 DE 2002154743 DE2002154743 DE 2002154743 DE 10254743 A DE10254743 A DE 10254743A DE 10254743 A1 DE10254743 A1 DE 10254743A1
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DE
Germany
Prior art keywords
tig
helium
argon
protective gas
balance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
DE2002154743
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German (de)
Inventor
Alfward Dr. Farwer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Liquide Deutschland GmbH
Original Assignee
Messer Griesheim GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Priority to DE2002154743 priority Critical patent/DE10254743A1/en
Publication of DE10254743A1 publication Critical patent/DE10254743A1/en
Ceased legal-status Critical Current

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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

Abstract

Protective gas contains 9-30 volume % helium, 0.15-5 volume % hydrogen and a balance of argon.

Description

Die Erfindung betrifft ein Schutzgas zum WIG- und Plasma-Schweißen von Werkstoffen, insbesondere von Metallen mit einer unter der von Aluminium liegenden Wärmeleitfähigkeit wie hoch- oder niedriglegierten Stählen.The invention relates to a protective gas for TIG and plasma welding of materials, especially metals with a less than that of Aluminum lying thermal conductivity like high or low alloy steels.

Aus DE 198 48 954 A1 ist ein zum WIG-Schweißen von Metallen, die in der Wärmeleitfähigkeit unter Aluminium liegen, insbesondere von hoch- oder niedriglegierten Stählen, geeignetes Argon-Schutzgas mit einem Zusatz von 0,15 bis 1,5 Vol.-Wasserstoff und 0,5 bis 9 Vol.-% Helium bekannt.Out DE 198 48 954 A1 is a suitable argon shielding gas with an addition of 0.15 to 1.5 vol. hydrogen and 0.5 to 9 for the TIG welding of metals that have a thermal conductivity below aluminum, in particular of high or low-alloy steels Vol .-% helium known.

Bei den bisher zum WIG- und Plasmaschweißen eingesetzten Schutzgasen treten folgende wesentliche Probleme auf:

  • – zu geringe Lichtbogenstabilität
  • – zu geringe Schweißgeschwindigkeit
  • – Oxidation der Nahtoberfläche
  • – Anfliessverhalten nur mäßig
  • – Nahtaussehen (Nahtschuppung ungleichmäßig)
  • – schlechte Zwangslageneigung
  • - schlechte Spaltüberbrückbarkeit.
The following major problems arise with the shielding gases previously used for TIG and plasma welding:
  • - Arc stability too low
  • - welding speed too low
  • - Oxidation of the seam surface
  • - Flow behavior only moderate
  • - Seam appearance (seam scaling uneven)
  • - bad predisposition
  • - poor gap bridgeability.

Der Erfindung liegt deshalb die Aufgabe zugrunde, ein Schutzgas zu schaffen, mit dem eine Verbesserung der Leistungsfähigkeit beim WIG- und Plasma-Schweißen von Werkstoffen, insbesondere von Metallen mit einer unter der von Aluminium liegenden Wärmeleitfähigkeit wie hoch- oder niedriglegierten Stählen, unter Beibehaltung eines den jeweiligen Anforderungen entsprechenden Qualitätsstandards ermöglicht wird.The object of the invention is therefore to create a protective gas with which an improvement of the capacity in TIG and plasma welding of Materials, especially of metals with one below that of aluminum lying thermal conductivity like high or low alloys steels, while maintaining a corresponding to the respective requirements quality standards allows becomes.

Diese Aufgabe wird durch ein Schutzgas mit den Merkmalen von Anspruch 1 gelöst.This task is carried out by an inert gas solved with the features of claim 1.

Beim WIG- und Plasma-Schweißen werden durch den Einsatz des erfindungsgemäßen 3-Komponenten-Schutzgases mit einem Helium-Anteil von 9 bis 30 Vol.-% und einem Wasserstoff-Anteil von 0,15 bis 5 Vol.-%, Rest Argon, folgende wesentlichen Vorteile realisiert:

  • - eine verbesserte Lichtbogenstabilität,
  • - eine Steigerung der Schweißgeschwindigkeit,
  • – eine Verringerung der Oxidation der Nahtoberfläche,
  • – ein verbessertes Anfliessverhalten und
  • – eine gleichmäßige Nahtschuppung.
In TIG and plasma welding, the use of the 3-component protective gas according to the invention with a helium content of 9 to 30% by volume and a hydrogen content of 0.15 to 5% by volume, the rest argon, realized the following main advantages:
  • - improved arc stability,
  • - an increase in the welding speed,
  • - a reduction in the oxidation of the seam surface,
  • - an improved flow behavior and
  • - an even seam scaling.

Claims (1)

Schutzgas zum WIG-und Plasma-Schweißen von Werkstoffen, insbesondere von Metallen mit einer unter der von Aluminium liegenden Wärmeleitfähigkeit wie hoch- und niedriglegierten Stählen, gekennzeichnet durch 9 bis 30 Vol.-% Helium und 0,15 bis 5 Vol.-% Wasserstoff, Rest Argon.Shielding gas for TIG and plasma welding of Materials, especially of metals with one below that of aluminum lying thermal conductivity such as high and low alloy steels, characterized by 9 to 30 vol .-% helium and 0.15 to 5 vol .-% hydrogen, balance argon.
DE2002154743 2002-11-23 2002-11-23 Protective gas for TIG and plasma welding of metallic materials, e.g. high and low alloy steels contains hydrogen, helium and a balance of argon Ceased DE10254743A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2002154743 DE10254743A1 (en) 2002-11-23 2002-11-23 Protective gas for TIG and plasma welding of metallic materials, e.g. high and low alloy steels contains hydrogen, helium and a balance of argon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2002154743 DE10254743A1 (en) 2002-11-23 2002-11-23 Protective gas for TIG and plasma welding of metallic materials, e.g. high and low alloy steels contains hydrogen, helium and a balance of argon

Publications (1)

Publication Number Publication Date
DE10254743A1 true DE10254743A1 (en) 2004-06-09

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Family Applications (1)

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DE2002154743 Ceased DE10254743A1 (en) 2002-11-23 2002-11-23 Protective gas for TIG and plasma welding of metallic materials, e.g. high and low alloy steels contains hydrogen, helium and a balance of argon

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DE (1) DE10254743A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1707295A1 (en) * 2005-03-31 2006-10-04 Messer Group GmbH Shielding gas for TIG-welding of metals
EP2017027A1 (en) 2007-07-17 2009-01-21 Linde Aktiengesellschaft Method of arc welding or soldering
EP3808490A1 (en) * 2019-10-16 2021-04-21 Linde GmbH Low emission shielding gas for stainless steel welding

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639427A1 (en) * 1993-08-17 1995-02-22 Linde Aktiengesellschaft Process for shielded arc welding and shielding gas therefor
DE19848954A1 (en) * 1997-11-03 1999-05-06 Messer Griesheim Gmbh Argon-based TIG welding shielding gas contains hydrogen and helium

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639427A1 (en) * 1993-08-17 1995-02-22 Linde Aktiengesellschaft Process for shielded arc welding and shielding gas therefor
DE19848954A1 (en) * 1997-11-03 1999-05-06 Messer Griesheim Gmbh Argon-based TIG welding shielding gas contains hydrogen and helium

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1707295A1 (en) * 2005-03-31 2006-10-04 Messer Group GmbH Shielding gas for TIG-welding of metals
EP2017027A1 (en) 2007-07-17 2009-01-21 Linde Aktiengesellschaft Method of arc welding or soldering
DE102007033291A1 (en) 2007-07-17 2009-01-22 Linde Ag Method of arc joining
EP3808490A1 (en) * 2019-10-16 2021-04-21 Linde GmbH Low emission shielding gas for stainless steel welding

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OP8 Request for examination as to paragraph 44 patent law
8127 New person/name/address of the applicant

Owner name: AIR LIQUIDE DEUTSCHLAND GMBH, 47805 KREFELD, DE

8131 Rejection