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WO2000024545A1 - Method for arc brazing using an inert gas - Google Patents

Method for arc brazing using an inert gas Download PDF

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Publication number
WO2000024545A1
WO2000024545A1 PCT/EP1999/007663 EP9907663W WO0024545A1 WO 2000024545 A1 WO2000024545 A1 WO 2000024545A1 EP 9907663 W EP9907663 W EP 9907663W WO 0024545 A1 WO0024545 A1 WO 0024545A1
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WO
WIPO (PCT)
Prior art keywords
gas mixture
mig
mag
brazing
oxygen
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
PCT/EP1999/007663
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German (de)
French (fr)
Inventor
Horst Albrecht
Gerd Klein
Klaus Pesler
Heinrich Schrader
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.)
Messer Griesheim GmbH
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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
Publication of WO2000024545A1 publication Critical patent/WO2000024545A1/en
Anticipated expiration legal-status Critical
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
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/34—Coated articles, e.g. plated or painted; Surface treated articles
    • B23K2101/35—Surface treated articles
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys
    • 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
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/302—Cu as the principal constituent

Definitions

  • the invention relates to a protective gas mixture for MIG / MAG brazing with argon as the main gas component and a method for MIG / MAG brazing with the protective gas mixture.
  • Shielding gases for MAG welding with solid steel wire and shielding gases with active gas components> 4.0% by volume (0 2 or CO 2 ) are currently used to connect galvanized sheets.
  • MIG soldering under pure inert gas (argon / helium) is also used.
  • high copper-containing solder wire electrodes are used, which in many cases cause a poorer melt flow when using pure inert gas.
  • the invention has for its object to provide a method for brazing galvanized materials, wherein zinc evaporation and
  • Spatter formation is reduced and droplet detachment is improved with good flank dimensioning.
  • the protective gas mixture with argon as the main component preferably contains oxygen. If oxygen alone is contained in the protective gas mixture as an oxygen-containing gas, the addition is advantageously from 0.2 to 0.6% by volume of O 2 , preferably from 0.4 to 0.6% by volume of O 2 , in particular around 0 5 vol.% O 2 .
  • Galvanized materials are, for example, galvanized steel sheets or steel profiles, preferably steel sheets with a thickness in the range from 0.5 to 1 mm, in some cases also up to 5 mm, particularly preferably 0.7 to 0.8 mm, in particular 0.75 mm.
  • the materials are usually galvanized, sensimir, hot, buna or granocoat galvanized.
  • the galvanizing generally has a layer thickness in the range from 10 to 50 ⁇ m.
  • the process for MIG / MAG brazing works with a melting and continuously supplied wire electrode, preferably with a high copper wire electrode with small proportions of Al, Si or Sn, particularly preferably made of CuSi3.
  • the wire electrode generally has a diameter in the range from 0.8 to 1.6 mm.
  • Wire diameter worked is preferably carried out in the low current range, generally in the range from 50-180 A (amperes), particularly advantageously in the range from 60-120 A.
  • the wire feed speed is preferably in the range from 3.5 to 8 m / min preferably in the range from 4.5 to 7 m / min., in particular in
  • the process is used, for example, in the manufacturing areas of the automotive industry, air conditioning technology and the construction industry.
  • Spatter formation and zinc evaporation are special application criteria, which can be significantly reduced.
  • the shielding gas mixture provides optimal results under the following process conditions: Workpiece: 0.5 to 5.0 mm solder wire: 1, 0 0 wire feed: 5.0 to 6.5 m / min.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)

Abstract

The inert gas mixture for MIG/MAG arc brazing having argon as main gas component contains 0.2 to 1.2 percent by volume O2. The inert gas mixture is used in the method for MIG/MAG arc brazing of zinc materials, wherein the method operates in a low current range, preferably at a soldering speed of 0.3 to 1 m/min in a short or pulsed arc range with a welding wire fusion efficiency of 3.5 to 8 m/min.

Description

Verfahren zum Lichtbogen-Hartlöten unter SchutzgasProcess for arc brazing under protective gas

Die Erfindung betrifft ein Schutzgasgemisch zum MIG-/MAG-Hartlöten mit Argon als Hauptgaskomponente und ein Verfahren zum MIG-/MAG-Hartlöten mit dem Schutzgasgemisch.The invention relates to a protective gas mixture for MIG / MAG brazing with argon as the main gas component and a method for MIG / MAG brazing with the protective gas mixture.

Zum Verbinden von verzinkten Blechen werden derzeit Schutzgase zum MAG- Schweißen mit massivem Stahldraht und Schutzgasen mit Aktivgaskomponenten > 4,0 Vol.-% (02 oder CO2) verwendet. Daneben kommt das MIG-Löten unter reinem Inertgas (Argon/Helium) zum Einsatz. Hierbei werden zum Beispiel hochkupferhaltige Lötdrahtelektroden eingesetzt, die bei Verwendung von reinem Inertgas in vielen Fällen einen schlechteren Schmelzfluß bewirken.Shielding gases for MAG welding with solid steel wire and shielding gases with active gas components> 4.0% by volume (0 2 or CO 2 ) are currently used to connect galvanized sheets. MIG soldering under pure inert gas (argon / helium) is also used. Here, for example, high copper-containing solder wire electrodes are used, which in many cases cause a poorer melt flow when using pure inert gas.

Das Verschweißen oder Hartlöten verzinkter Werkstoffe, insbesondere dünner verzinkter Stahlbleche, ist problematisch, da es bei hohen Temperaturen, wie beispielsweise beim MAG-Schweißen, zu einer Zinkverdampfung kommt.Welding or brazing galvanized materials, in particular thin galvanized steel sheets, is problematic since zinc evaporation occurs at high temperatures, such as during MAG welding.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Hartlöten von verzinkten Werkstoffen zu schaffen, wobei eine Zinkverdampfung und dieThe invention has for its object to provide a method for brazing galvanized materials, wherein zinc evaporation and

Spritzerbildung reduziert und die Tropfenablösung bei guter Flankenbemessung verbessert wird.Spatter formation is reduced and droplet detachment is improved with good flank dimensioning.

Es wurde gefunden, daß beim MIG-/MAG-Hartlöten von verzinkten Werkstoffen wie dünnen, verzinkten Stahlblechen mit hochkupferhaltigemIt was found that when MIG / MAG brazing of galvanized materials such as thin, galvanized steel sheets with high copper content

Lötdraht bei Verwendung von Schutzgasen auf Argon-Basis mit Zusätzen eines oder mehrerer sauerstoffhaltiger Gase, die im Sauerstoffgehalt einem Anteil von 0,3 bis 0,8 Vol.-% von Sauerstoffgas entsprechen, wobei die Zusätze mindestens 0,2 Vol.-% Sauerstoffgas enthalten, unerwartet gute Ergebnisse bezüglich der Vermeidung von Zinkverdampfung, derSolder wire when using protective gases based on argon with additions of one or more oxygen-containing gases, the oxygen content of which corresponds to a proportion of 0.3 to 0.8 vol.% Of oxygen gas, the additions being at least 0.2 vol.% Oxygen gas contain, unexpectedly good results regarding the prevention of zinc evaporation, the

Spritzerbildung, der Verbesserung der Lichtbogenstabilität und im Schmelzflußverhalten erzielt werden. Gelöst wurde die Aufgabe somit durch ein Schutzgasgemisch gemäß Anspruch 1 und durch ein Verfahren mit den Merkmalen gemäß Anspruch 3. Vorteilhafte Ausgestaltungen sind in den Unteransprüchen aufgeführt.Spatter formation, the improvement of the arc stability and the melt flow behavior can be achieved. The object was thus achieved by a protective gas mixture according to claim 1 and by a method with the features according to claim 3. Advantageous refinements are listed in the subclaims.

Das Schutzgasgemisch mit Argon als Hauptkomponente (in der Regel mindestens 99 Vol.-% Argon) enthält vorzugsweise Sauerstoff. Ist Sauerstoff allein als sauerstoffhaltiges Gas in dem Schutzgasgemisch enthalten, dann beträgt der Zusatz vorteilhaft 0,2 bis 0,6 Vol.-% O2, vorzugsweise von 0,4 bis 0,6 Vol.-% O2, insbesondere um 0,5 Vol.-% O2.The protective gas mixture with argon as the main component (generally at least 99% by volume argon) preferably contains oxygen. If oxygen alone is contained in the protective gas mixture as an oxygen-containing gas, the addition is advantageously from 0.2 to 0.6% by volume of O 2 , preferably from 0.4 to 0.6% by volume of O 2 , in particular around 0 5 vol.% O 2 .

Verzinkte Werkstoffe sind beispielsweise verzinkte Stahlbleche oder Stahlprofile, bevorzugt Stahlbleche mit einer Dicke im Bereich von 0,5 bis 1 mm, in einigen Fällen auch bis zu 5 mm, besonders bevorzugt 0,7 bis 0,8 mm, insbesondere 0,75 mm. Die Werkstoffe sind in der Regel galvanisch-, sensimir-, feuer-, buna- oder granocoat-verzinkt. Die Verzinkung hat in der Regel eine Schichtdicke im Bereich von 10 bis 50 μm.Galvanized materials are, for example, galvanized steel sheets or steel profiles, preferably steel sheets with a thickness in the range from 0.5 to 1 mm, in some cases also up to 5 mm, particularly preferably 0.7 to 0.8 mm, in particular 0.75 mm. The materials are usually galvanized, sensimir, hot, buna or granocoat galvanized. The galvanizing generally has a layer thickness in the range from 10 to 50 μm.

Das Verfahren zum MIG-/MAG-Hartlöten arbeitet mit einer abschmelzenden und kontinuierlich zugeführten Drahtelektrode, vorzugsweise mit einer hochkupferhaltigen Drahtelektrode mit geringen Anteilen von AI, Si oder Sn, besonders bevorzugt aus CuSi3. Die Drahtelektrode hat in der Regel einen Durchmesser im Bereich von 0,8 bis 1 ,6 mm. Vorzugsweise wird mit 8-15 mm freier Drahtlänge bei 0,8mm Drahtdurchmesser, mit 9-16 mm freier Drahtlänge bei 1 ,0mm Drahtdurchmesser und mit 10-17 mm freier Drahtlänge bei 1 ,2mmThe process for MIG / MAG brazing works with a melting and continuously supplied wire electrode, preferably with a high copper wire electrode with small proportions of Al, Si or Sn, particularly preferably made of CuSi3. The wire electrode generally has a diameter in the range from 0.8 to 1.6 mm. Preferably with 8-15 mm free wire length at 0.8mm wire diameter, with 9-16 mm free wire length at 1.0mm wire diameter and with 10-17 mm free wire length at 1.2mm

Drahtdurchmesser gearbeitet. Vorzugsweise wird das Verfahren im Niederstrombereich durchgeführt, in der Regel im Bereich von 50-180 A (Ampere), besonders vorteilhaft im Bereich von 60-120 A. Die Drahtvorschubgeschwindigkeit liegt vorzugsweise im Bereich von 3,5 bis 8 m/Min., besonders bevorzugt im Bereich von 4,5 bis 7 m/Min., insbesondere imWire diameter worked. The process is preferably carried out in the low current range, generally in the range from 50-180 A (amperes), particularly advantageously in the range from 60-120 A. The wire feed speed is preferably in the range from 3.5 to 8 m / min preferably in the range from 4.5 to 7 m / min., in particular in

Bereich von 5 bis 6,5 m/Min. Das Verfahren wird zum Beispiel eingesetzt in den Fertigungsbereichen der Fahrzeugindustrie, der Klimatechnik und der Baubranche.Range from 5 to 6.5 m / min. The process is used, for example, in the manufacturing areas of the automotive industry, air conditioning technology and the construction industry.

Als besondere Anwendungskriterien gelten die Spritzerbildung und Zinkverdampfung, die sich erheblich reduzieren lassen.Spatter formation and zinc evaporation are special application criteria, which can be significantly reduced.

Darüber hinaus wird insbesondere beim MAG-Löten die Tropfenablösung im Impuls- und auch im Kurzlichtbogenbereich verbessert bei guter Flankenbenetzung.In addition, especially with MAG soldering, droplet detachment in the pulse and also in the short arc area is improved with good flank wetting.

Man kann also mit dem genannten Verfahren in Verbindung mit den entsprechenden Schutzgasen wirtschaftlicher arbeiten und hat gleichzeitig ein gutes Nahtbild und einen sicheren Prozeßablauf, der auch vom Anwender leicht zu beherrschen ist.So you can work more economically with the above-mentioned process in conjunction with the appropriate protective gases and at the same time have a good seam appearance and a safe process flow, which is also easy for the user to master.

Das Schutzgasgemisch liefert optimale Ergebnisse bei folgenden Verfahrensbedingungen: Werkstück: 0,5 bis 5,0 mm Lötdraht: 1 ,0 0 Drahtvorschub: 5,0 bis 6,5 m/Min.The shielding gas mixture provides optimal results under the following process conditions: Workpiece: 0.5 to 5.0 mm solder wire: 1, 0 0 wire feed: 5.0 to 6.5 m / min.

Stromstärke: 60 bis 120 A Brennerführung: 0 bis 15° stechend Current: 60 to 120 A burner guide: 0 to 15 ° piercing

Claims

Patentansprüche claims 1. Schutzgasgemisch zum MIG-/MAG-H artlöten mit Argon als Hauptgaskomponente mit 02-Gehalten von 0,2 bis 1 ,2 Vol.-%.1. Shielding gas mixture for MIG / MAG hard soldering with argon as the main gas component with 0 2 contents of 0.2 to 1, 2 vol .-%. 2. Schutzgasgemisch zum MIG-/MAG-Hartlöten verzinkter Werkstoffe mit Argon als Hauptgaskomponente, dadurch gekennzeichnet, daß das Schutzgasgemisch ein oder mehrere sauerstoffhaltige Gase, die im Sauerstoffgehalt insgesamt einem Anteil von 0,3 bis 0,8 Vol.-% von2. Shielding gas mixture for MIG / MAG brazing of galvanized materials with argon as the main gas component, characterized in that the shielding gas mixture contains one or more oxygen-containing gases, the total oxygen content of which is 0.3 to 0.8% by volume Sauerstoffgas entsprechen, und dabei mindestens 0,2 Vol.-% Sauerstoffgas enthält.Correspond to oxygen gas and contain at least 0.2% by volume of oxygen gas. 3. Verfahren zum MIG-/MAG-Hartlöten verzinkter Werkstoffe, dadurch gekennzeichnet, daß das Verfahren im Niederstrombereich arbeitet, vorzugsweise bei einer Lötgeschwindigkeit von 0,3 bis 1 m/min. im Kurzoder Impulslichtbogenbereich mit Draht-Abschmelzleistung 3,5 bis 8 m/min und ein Schutzgasgemisch nach den Ansprüchen 1 bis 2 eingesetzt wird.3. Process for MIG / MAG brazing of galvanized materials, characterized in that the process works in the low current range, preferably at a soldering speed of 0.3 to 1 m / min. in the short or pulse arc range with wire melting capacity of 3.5 to 8 m / min and a protective gas mixture according to claims 1 to 2 is used. 4. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Drahtelektrode als Hauptkomponente Kupfer mit geringen Anteilen von AI, Si, Sn oder Mischungen enthält mit Drahtabmessungen von 0,8 bis 1 ,6 mm Durchmesser.4. The method according to claim 2, characterized in that the wire electrode contains copper as the main component with small proportions of Al, Si, Sn or mixtures with wire dimensions of 0.8 to 1.6 mm in diameter. 5. Verfahren nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß eine Erhöhung der Wirtschaftlichkeit erreicht wird durch die Reduzierung der Schweißspritzerzinkverdampfung mit handelsüblichen Schweißstromquellen mit guter Regelbarkeit im weiteren Schweißstrombereich. 5. The method according to claim 3 or 4, characterized in that an increase in economy is achieved by reducing the welding spatter zinc evaporation with commercially available welding current sources with good controllability in the further welding current range.
PCT/EP1999/007663 1998-10-27 1999-10-12 Method for arc brazing using an inert gas Ceased WO2000024545A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19849510.2 1998-10-27
DE19849510A DE19849510A1 (en) 1998-10-27 1998-10-27 Process for arc brazing under protective gas

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1101559A3 (en) * 1999-10-28 2003-10-22 Linde AG MAG soldering method and use of a protective gas
EP1321218A3 (en) * 2001-12-20 2004-07-07 Linde Aktiengesellschaft Method for joining dissimilar materials in shielding gas
US7161109B2 (en) 2003-08-18 2007-01-09 Praxair Technology, Inc. Gas metal arc welding of coated steels and shielding gas therefor
WO2014134041A1 (en) * 2013-02-28 2014-09-04 United Technologies Corporation System and method low heat weld

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6570127B2 (en) * 2001-05-03 2003-05-27 Praxair Technology, Inc. Shielding gas mixture for MIG brazing
EP1462207A1 (en) * 2003-03-29 2004-09-29 Grillo-Werke AG Welding, soldering or brazing method under a protective atmosphere of metallic workpieces using a Zn/Al filler material
DE102005040552A1 (en) * 2005-08-26 2007-03-01 Linde Ag Method of arc joining
DE102005044757A1 (en) * 2005-09-20 2007-03-29 Messer Group Gmbh Pollutant-reducing protective gas mixture for MAG welding of unalloyed or low-alloyed steels
DE102007021054A1 (en) * 2007-05-04 2008-11-06 Linde Ag Method of arc joining
CN114453712A (en) * 2021-12-06 2022-05-10 河钢股份有限公司 Application of ternary mixed protective gas in gas metal arc welding

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GB1378091A (en) * 1971-01-07 1974-12-18 British Oxygen Co Ltd Shielding gas
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GB807037A (en) * 1957-12-21 1959-01-07 Union Carbide Corp Gas-shielded metal arc welding
DE2014799A1 (en) * 1969-04-04 1970-10-15 Union Carbide Corp., New York, N.Y. (V.St.A.) Process and welding wire for gas-shielded metal welding
GB1378091A (en) * 1971-01-07 1974-12-18 British Oxygen Co Ltd Shielding gas
EP0207019A2 (en) * 1985-05-22 1986-12-30 Aga Aktiebolag Shielding gas
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Title
MATSUI H ET AL: "REDUCTION OF BLOWHOLES IN HIGH-SPEED ARC WELDING OF HOT-DIP GALVANISED STEEL SHEETS", WELDING INTERNATIONAL,GB,WELDING INSTITUTE. ABINGTON, vol. 12, no. 6, 1 January 1998 (1998-01-01), pages 432 - 439, XP000765083, ISSN: 0950-7116 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1101559A3 (en) * 1999-10-28 2003-10-22 Linde AG MAG soldering method and use of a protective gas
EP1321218A3 (en) * 2001-12-20 2004-07-07 Linde Aktiengesellschaft Method for joining dissimilar materials in shielding gas
US7189941B2 (en) 2001-12-20 2007-03-13 Linde Aktiengesellschaft Process for making heterogeneous joints under shielding gas
US7161109B2 (en) 2003-08-18 2007-01-09 Praxair Technology, Inc. Gas metal arc welding of coated steels and shielding gas therefor
WO2014134041A1 (en) * 2013-02-28 2014-09-04 United Technologies Corporation System and method low heat weld
US10486255B2 (en) 2013-02-28 2019-11-26 United Technologies Corporation Method of short circuit pulse metal inert gas welding

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