EP1474263A2 - Ternäre gasmischung und ihre verwendung für schweissen-löten von verzinkten werkstücken - Google Patents

Ternäre gasmischung und ihre verwendung für schweissen-löten von verzinkten werkstücken

Info

Publication number
EP1474263A2
EP1474263A2 EP03712259A EP03712259A EP1474263A2 EP 1474263 A2 EP1474263 A2 EP 1474263A2 EP 03712259 A EP03712259 A EP 03712259A EP 03712259 A EP03712259 A EP 03712259A EP 1474263 A2 EP1474263 A2 EP 1474263A2
Authority
EP
European Patent Office
Prior art keywords
hydrogen
gas mixture
carbon dioxide
argon
parts
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.)
Withdrawn
Application number
EP03712259A
Other languages
English (en)
French (fr)
Inventor
Thomas Opderbecke
Jean-Yves Square de l'Echiquier MOUTON
Jean-Marie Fortain
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA a Directoire et Conseil de Surveillance pour lEtude et lExploitation des Procedes Georges Claude
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 Air Liquide SA, LAir Liquide SA a Directoire et Conseil de Surveillance pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP1474263A2 publication Critical patent/EP1474263A2/de
Withdrawn legal-status Critical Current

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
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode

Definitions

  • the present invention relates to a ternary gas mixture usable in soldering of galvanized parts.
  • the thickness of the coated sheets used in particular in the automotive field is usually between 0.5 mm and 1.5 mm.
  • Such thin thicknesses require adaptation of the welding process used to weld them in order to reduce the energy input and therefore avoid defects such as excessive penetration of the weld at the risk of piercing the sheet, a thermal deformation of the sheets, degradation of the zinc coating on the side and back, or metallurgical and chemical degradation of the sheets.
  • zinc which is the main constituent of the coating of galvanized thin sheets, is characterized by a melting point at 402 ° C lower (boiling point of zinc: 906 ° C) than the base metal and the filler metal. During welding, it is therefore vaporized by the action of the electric arc or by simple thermal conduction and these zinc vapors can then cause disturbances.
  • vaporized zinc can enter the atmosphere of the electric arc and suddenly modify the physical properties of the protective atmosphere, in particular the electrical and thermal conductivity, and consequently cause instabilities in the metal transfer mode.
  • this vaporization of zinc in the molten metal can cause splashes of molten metal on either side of the weld bead.
  • porosities or blisters which form when zinc is vaporized under the root of the bead when performing a seam weld, often cause a gas overpressure under the liquid bath. This occurs all the more since the spacing between the sheets to be joined is small and the thickness of the zinc is large. If the cooling of the bath is too rapid, the vapors do not have enough time to rise to the surface can, depending on their density, affect the mechanical properties of the assembly.
  • Soldering uses copper filler metals with a lower melting point, typically between 890 ° C and 1080 ° C, than that of the ferrous base metal constituting the parts to be welded but higher than that of the zinc coating , i.e. about 402 ° C.
  • the assembly of the parts to be welded together is not done by a fusion of the base metal and the metal but by "wetting" of the solid base metal with liquid copper metal brought in the form of filler wire .
  • Soldering requires a significantly reduced energy input since this energy is only used to melt the filler wire and not to heat and melt the part. In fact, the quantity of zinc vaporized is greatly reduced compared to conventional welding.
  • Short arc transfer is used for applications that require minimal energy input and for cords
  • the shielding gas used in the MIG / MAG process plays an important role for the process because it has a notable influence on the electrical and thermal properties of the atmosphere of the electric arc, on the one hand , and on the protection of the bath.
  • soldering is used with the objective of reducing energy input. We will therefore use rather inert and not very active gases.
  • the gas generally recommended for brazing is pure argon. However, other gases or gas mixtures have already been described as being able to be used in brazing.
  • the present invention therefore aims to improve the MIG process of brazing by proposing a gas mixture making it possible, during its implementation in brazing of coated sheets, to obtain: - a reduction in the energy supply to reduce the volume of volatilized zinc and deformations,
  • the solution of the invention relates to a ternary gas mixture consisting of hydrogen, carbon dioxide and argon in the following volume proportions: from 0.4 to 2% of hydrogen, - from 0.3 to 2% of carbon dioxide , and argon for the rest (up to 100%).
  • the gas mixture of the invention can comprise one or more of the following technical characteristics:
  • the gas protection consists of a ternary mixture formed exclusively of argon, hydrogen and carbon dioxide.
  • unavoidable impurities can be found in small proportions, for example up to 20 ppm by volume of oxygen, up to 20 ppm of nitrogen, up to 50 ppm of CnHm, and up to 30 ppm of water vapour.
  • the invention also relates to a method of brazing of galvanized metal parts, in which a brazing is carried out between the parts to be assembled by fusion, by means of at least one electric arc, of a metallic filler wire with implementation of a gas protection of the brazing, characterized in that the gas protection is formed of a gas mixture as given above.
  • the soldering method of the invention may include one or more of the following technical characteristics:
  • the parts to be assembled have a thickness of less than 3 mm, preferably between 0.5 and 2 mm, more preferably between 0.6 and 1.5 mm.
  • the filler wire is made of copper and aluminum alloy (CuAI alloy) or silicon (CuSi alloy.)
  • the metal parts are made of unalloyed carbon steel, preferably with a high elastic limit (HLE) or a very high elastic limit (THLE).
  • HLE high elastic limit
  • THLE very high elastic limit
  • the intensity of the current used to generate the arc (s) is less than 200 A for a wire of 1 mm in diameter.
  • the current is of variable polarity or not.
  • the transfer regime is of the pulsed or short-circuit type.
  • the parts are galvanized by electrogalvanizing or hot galvanized.
  • the invention also relates to a method of manufacturing motor vehicle elements formed from several parts assembled by a soldering method according to the invention, in particular motor vehicle elements chosen from the group formed by the body of the vehicles, ground junctions, chamons, engine cradle, plank sleepers, edge sleepers, side members, under sleepers and hydroformed components.
  • the invention also relates to a method of manufacturing a container formed from several parts assembled by a soldering method according to one of the invention.
  • soldering process of the invention can also be used to assemble parts used to make other structures, such as greenhouse frames or the like, ventilation ducts, electrical boxes, etc.
  • the weld assembly is formed from DX54D + Z120 sheets of 0.8 mm and 1.5 mm thickness according to standard EN10142, hot-dip galvanized on both sides, i.e. having a double zinc face of 10 ⁇ m thick.
  • the assemblies are positioned flat and flat.
  • CuAI 8 and CuSi 3 type filler wires with diameters of 1 mm and 1.2 mm are used according to the two types of transfer, short circuit and pulsed.
  • the ideal gas flow rate for the protection of the arc and the welding bath is given by a standardized surface value of approximately 0.05 l / min x mm 2 .
  • the flow rate is 30 l / min, while for a nozzle of 16 mm in diameter, in manual welding, the flow rate is 20 l / min. .
  • Example 1 choice of a gas mixture Initially, the inventors of the present invention sought to determine the effects of several gaseous compounds contained in a mixture of protective gases based on argon.
  • arc stability it can be seen in table I that, when oxidizing elements are added to argon, such as 0 2 and C0 2 , the arc stability is increased by the formation of more emissive surface oxides. Nitrogen can also bring a stabilizing effect but to a lesser extent.
  • Certain elements such as He or H 2 in argon, have a positive contribution on the appearance and morphology of the cord.
  • the arc under helium requires a higher voltage and therefore a higher energy supplied to the melt which can improve the wetting conditions of the cord but make it more difficult to control penetration on thin sheets.
  • Hydrogen contributes to an improvement in the morphology and appearance of the cord.
  • the first property is linked to a constricting effect of the arc in the area near the end of the wire, i.e. an endothermic dissociation which causes significant cooling of the external periphery and therefore constriction, and to an effect of restitution of significant heat at the level of the part to be welded, namely a recombination on the surface with release of energy.
  • the second property by the reducing effect of hydrogen, makes it possible to obtain beads free of surface oxides.
  • Example 2 test of the gas mixture 98.5% Ar + 1% H-, .. 0.5% CO-,
  • the gas mixture mixture formed of 98.5% Ar + 1% H 2 + 0.5% C0 2 (% by volume) is evaluated in automatic welding and in manual welding by adopting the following parameters:
  • FIG. 1 makes it possible to compare the arc stability in pulsed welding with argon (top graph) or, for comparison, the gas mixture Ar-H 2 -C0 2 of the invention (bottom graph).
  • the improvement in arc stability results in a reduced dispersion of the peak voltage (U) and of the dropout voltage at low voltage.
  • FIG. 2 makes it possible to compare the wetting obtained by welding pulsed with argon (top graph) or, for comparison, the gas mixture Ar- H 2 -C0 2 of the invention (bottom graph).
  • the wetting is characterized by the width (L), the thickness (H), the penetration (P) and the connection angle ( ⁇ ).
  • An example of this evaluation can be found in the appendix (fig. 2).
  • the mechanical performance of the 0.8mm thick plate assemblies obtained is evaluated by the breaking strength (R m ) determined in the 'guided' tensile test.
  • the results are given in Table III below for the ternary gas mixture of the invention (Ar / C0 2/0 2 of composition 98.5% Ar + 1% H 2 + 0.5% C0 2 ) and, for comparison, a binary argon gas mixture added with 2% by volume. of C0 2 (Ar + 2% C0 2 ).
  • the upper limit is determined by the maximum solubility of hydrogen in the molten metal which results in a risk of the appearance of porosities as soon as the high limit is crossed.
  • the H 2 content has been limited to 1% by volume, which also represents a good compromise between improving the shape and appearance of the bead, and increasing the welding speed.
  • the clearance can be equal to the thickness.
  • the welded assemblies with the ternary gas mixture of the invention have tolerated a play of up to 2 mm for a thickness of 1.5 mm, ie a play, greater than the thickness of the welded parts.
  • the gas mixture of the invention has shown, moreover, an ability to confer good maneuverability in manual welding since the downward vertical welding and in cornice do not require adaptation of particular parameters compared to a welding in position to dish.
  • the surface appearance of the bead can be further improved by using a "stringer" which extends the protection zone by approximately 50 mm to optimize the gaseous protection of the welding bath during the cooling as this makes it possible to eliminate the copper oxides formed on the bead, a phenomenon which takes place essentially with the filler metal CuSi 3 .
  • the "laggard" can preferably be supplied with the same mixture or with pure argon (flow rate 101 / min approximately).

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
EP03712259A 2002-02-01 2003-01-17 Ternäre gasmischung und ihre verwendung für schweissen-löten von verzinkten werkstücken Withdrawn EP1474263A2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0201216A FR2835457B1 (fr) 2002-02-01 2002-02-01 Melange gazeux ternaire utilisable en soudo-brasage de pieces galvanisees
FR0201216 2002-02-01
PCT/FR2003/000155 WO2003064098A2 (fr) 2002-02-01 2003-01-17 Melange gazeux ternaire utilisable en soudo-brasage de pieces galvanisees

Publications (1)

Publication Number Publication Date
EP1474263A2 true EP1474263A2 (de) 2004-11-10

Family

ID=27619823

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03712259A Withdrawn EP1474263A2 (de) 2002-02-01 2003-01-17 Ternäre gasmischung und ihre verwendung für schweissen-löten von verzinkten werkstücken

Country Status (6)

Country Link
US (1) US7241970B2 (de)
EP (1) EP1474263A2 (de)
JP (1) JP4422484B2 (de)
CA (1) CA2474527C (de)
FR (1) FR2835457B1 (de)
WO (1) WO2003064098A2 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2875966B1 (fr) * 2004-09-30 2008-09-05 Valeo Equip Electr Moteur Machine electrique tournante telle qu'un alternateur, adaptable a differents types de moteurs thermiques
US20090095720A1 (en) * 2006-02-17 2009-04-16 Toshikazu Kamei Shielding gas for hybrid welding and hybrid welding method using the same
FR2912675B1 (fr) * 2007-02-16 2009-04-17 Commissariat Energie Atomique Procede d'assemblage refractaire entre un materiau carbone et un alliage de cuivre
JP5078143B2 (ja) * 2008-01-25 2012-11-21 日鐵住金溶接工業株式会社 亜鉛めっき鋼板のプラズマ溶接方法
CN102149502A (zh) * 2008-09-30 2011-08-10 大阳日酸株式会社 钢板的气体保护电弧钎焊方法
JP5287962B2 (ja) * 2011-01-26 2013-09-11 株式会社デンソー 溶接装置
JP2013212532A (ja) * 2012-04-04 2013-10-17 Iwatani Industrial Gases Corp アーク溶接用シールドガス
US9999944B2 (en) 2012-08-28 2018-06-19 Hobart Brothers Company Systems and methods for welding electrodes
US10543556B2 (en) * 2012-08-28 2020-01-28 Hobart Brothers Llc Systems and methods for welding zinc-coated workpieces
FR2998202B1 (fr) * 2012-11-19 2015-04-17 Centre Nat Rech Scient Soudage heterogene aluminium/cuivre
US10112268B2 (en) 2013-10-09 2018-10-30 Hobart Brothers Company Systems and methods for corrosion-resistant welding electrodes
US10300565B2 (en) 2014-10-17 2019-05-28 Hobart Brothers Company Systems and methods for welding mill scaled workpieces
JP6518160B2 (ja) * 2015-07-27 2019-05-22 株式会社神戸製鋼所 亜鉛めっき鋼板の溶接方法
DE102017006562A1 (de) 2017-07-11 2019-01-17 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Fügevorrichtung zum thermischen Fügen von Bauteilen, Fügeanordnung und Verfahren zum thermischen Fügen
JP7428601B2 (ja) * 2020-06-29 2024-02-06 株式会社神戸製鋼所 ガスシールドアーク溶接方法、構造物の製造方法及びシールドガス

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1910405C3 (de) * 1969-02-28 1980-07-10 Linde Ag, 6200 Wiesbaden Verfahren und Einrichtung zum Herstellen von Schutzgasgemischen für das Schweißen und Schneiden
FR2719514B1 (fr) * 1994-05-04 1996-06-07 Air Liquide Mélange gazeux de protection et procédé de soudage à l'arc de pièces en aciers inoxydables.
SE508596C2 (sv) * 1996-11-13 1998-10-19 Aga Ab Förfarande för hårdlödning medelst plasma
FR2776550B1 (fr) * 1998-03-26 2000-05-05 Air Liquide Procede de soudage ou de coupage plasma ou tig avec gaz non-oxydant a faible teneur en impuretes h2o et/ou o2
JP2000197971A (ja) * 1998-12-25 2000-07-18 Nippon Sanso Corp オ―ステナイト系ステンレス鋼の溶接用シ―ルドガス
JP3422970B2 (ja) * 2000-05-12 2003-07-07 東洋エンジニアリング株式会社 高クロムオ−ステナイトステンレス鋼管の溶接方法
FR2813544B1 (fr) * 2000-09-06 2002-10-18 Air Liquide Procede de soudage mig du nickel et des alliages de nickel avec gaz de protection a base d'argon et de co2
US6570127B2 (en) * 2001-05-03 2003-05-27 Praxair Technology, Inc. Shielding gas mixture for MIG brazing
DE10218297A1 (de) * 2001-05-11 2002-11-14 Linde Ag Tandemschweißschutzgas
FR2835456B1 (fr) 2002-02-01 2004-04-02 Air Liquide Procede de soudage d'elements de vehicules automobiles, en particulier de flancs raboutes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03064098A3 *

Also Published As

Publication number Publication date
CA2474527C (fr) 2011-01-04
WO2003064098A2 (fr) 2003-08-07
JP2005515899A (ja) 2005-06-02
US20050082349A1 (en) 2005-04-21
US7241970B2 (en) 2007-07-10
WO2003064098A3 (fr) 2004-04-15
CA2474527A1 (fr) 2003-08-07
FR2835457B1 (fr) 2004-04-02
FR2835457A1 (fr) 2003-08-08
JP4422484B2 (ja) 2010-02-24

Similar Documents

Publication Publication Date Title
CA2474527C (fr) Melange gazeux ternaire utilisable en soudo-brasage de pieces galvanisees
EP2593268B1 (de) Hybrides lichtbogenschweiss-/laserschweissverfahren für aluminiumbeschichtetes stahlteil unter verwendung von gammagenen elementen und gas mit weniger als 10 % stickstoff oder sauerstoff
CA2460094A1 (fr) Procede de soudage hybride laser-arc avec ajustage des debits de gaz
CA2800246A1 (fr) Procede de soudage hybride arc/laser de pieces en acier aluminise avec gaz comprenant de l'azote et/ou de l'oxygene
JP2006341313A (ja) アルゴン／ヘリウム／水素混合物を用いたｔｉｇブレーズ溶接方法
KR20190038412A (ko) 함알루미늄 용접 전극
CA2795471C (fr) Procede de soudage a l'arc avec gaz oxydant de pieces metalliques aluminiees
US6753502B2 (en) Shielding gas mixture for MIG brazing
CA2797289C (fr) Procede de soudage a l'arc, avec gaz inerte contenant de l'azote, de pieces metalliques aluminiees
FR2973727A1 (fr) Soudage homogene des aciers 9% ni
US9868173B2 (en) Method for arc welding with a dual gas flow, with a central flow containing argon and hydrogen, and with a sheath flow including argon and either carbon dioxide or oxygen
EP2078581B1 (de) MAG-Schweißverfahren einer Montageanordnung mit durchgezogenem Rand
EP1044752B1 (de) Verfahren zum pulsförmigen MIG-Schweissen von Al-Legierungen
EP2078580B1 (de) MAG-Schweißverfahren mit Rotationsbogen niedriger Energie
EP1295669A1 (de) Verfahren zum Tig-Schweissen mit Zusatzdraht und verbesserter Schutzgasabschermung
JP2001079668A (ja) アルミニウム又はアルミニウム合金材の溶接方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR

17P Request for examination filed

Effective date: 20041015

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'E

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'E

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

INTG Intention to grant announced

Effective date: 20141118

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MOUTON, JEAN-YVES

Inventor name: OPDERBECKE, THOMAS

Inventor name: FORTAIN, JEAN-MARIE

18W Application withdrawn

Effective date: 20141201