EP0300927B1 - Legierung auf Aluminiumbasis für Getränkedosen und Verfahren zu ihrer Herstellung - Google Patents

Legierung auf Aluminiumbasis für Getränkedosen und Verfahren zu ihrer Herstellung Download PDF

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EP0300927B1
EP0300927B1 EP88420210A EP88420210A EP0300927B1 EP 0300927 B1 EP0300927 B1 EP 0300927B1 EP 88420210 A EP88420210 A EP 88420210A EP 88420210 A EP88420210 A EP 88420210A EP 0300927 B1 EP0300927 B1 EP 0300927B1
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Prior art keywords
thickness
alloy
dissolution
content
cold rolling
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English (en)
French (fr)
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EP0300927A1 (de
Inventor
Didier Teirlinck
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Constellium Issoire SAS
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Pechiney Rhenalu SAS
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon

Definitions

  • the invention relates to an Al alloy containing essentially Si, Mn and Mg, intended for the manufacture of boxes and its process for obtaining in the form of sheets or strips.
  • One way to combat competition from other packaging materials, is to reduce the thicknesses of the strips of Al alloys used for the manufacture of boxes.
  • alloys will be designated according to the nomenclature of the Aluminum Association.
  • patent applications EP 59,812 and 97,319 describe Al-Mg-Si-Mn alloys in which the Mg / Si ratio is close to the value 1.73 thus giving alloys close to the stoichiometric composition Mg2Si.
  • these alloys present the risk of incomplete dissolution.
  • the presence of Mg2Si out of solution is indeed harmful with respect to the formability of the metal, especially for beverage can applications where the walls are strongly stretched and where an excess of precipitates can create damage leading to rupture during the stretching operation.
  • the present invention therefore relates to an alloy intended for the manufacture of bodies of boxes and lids which has both high mechanical characteristics and excellent formability by stamping (shrinking and expansion) and by drawing.
  • the Mn is between 0.8% and 1.15% and preferably between 0.85 and 1.10%.
  • It can also contain up to 0.6% Cu, up to 0.5% Fe, up to 0.3% (each) of Cr, Zr, Ti, B, Zn, and up to 0.05% each and 0.15% in total of other elements, remains Al.
  • the manufacturing range generally includes the semi-continuous casting of trays, homogenization, hot rolling, possible cold rolling, solution and quenching, possible maturation, cold rolling with or without intermediate treatment and structural hardening. This latter treatment is usually carried out during the firing of varnish-type surface coatings.
  • the metal can be continuously cast in the form of strips of thickness 6 to 12 mm, which eliminates the hot rolling step; after homogenization, the continuously cast metal undergoes the same range as the metal obtained by semi-continuous casting of trays.
  • the transformation range must be adapted to the desired final product but the solution must be complete (structure free of precipitates of Si and / or Mg2Si).
  • the strip is hot rolled to bring it to a thickness generally between 2 and 7 mm, the end temperature of hot rolling must be between 280 and 350 ° C to ensure recrystallization of the metal during coil cooling.
  • a first cold rolling can be carried out up to a thickness of 1 to 2 mm.
  • This solution treatment can be done in a through oven or alternatively in a static oven if the temperature rise rate is high enough and if the cooling allows the alloy to be metallurgically quenched.
  • the dissolution temperature should allow complete dissolution of the addition elements. For this, we will choose a temperature between 540 and 590 ° C, preferably 550-570 ° C.
  • the duration of the treatment varies from a few seconds to several minutes depending on the thickness of the product: in a static oven, it can be up to 1 hour.
  • the metal After this treatment, the metal must be quenched to ensure maximum effectiveness of the structural hardening. For this, we will ensure that the cooling rate is greater than 100 ° C / h.
  • the metal is then cold rolled to the final thickness. Alternatively, it can undergo before this step or during it, an intermediate treatment at a temperature between 100 and 220 ° C for a period of 5 min to 8 h.
  • FIG. 1 represents the field of the compositions claimed in the Mg-Si plane.
  • the two alloys according to the invention of the following composition are poured by the conventional semi-continuous process.
  • alloys are homogenized for 10 h at 600 ° C followed by a 4 h stage at 500 ° C (descent in 2 h).
  • alloys are hot rolled to a thickness of 3.5 mm and they are coiled at a temperature of the order of 330 ° C. They are then cold rolled to 1.5 mm and this solution is dissolved in a passing oven (metal temperature: 560 ° C for 5 mm) followed by air quenching (cooling up to 100 ° C in 30 sec.).
  • alloy B an additional manufacturing test was carried out for several thousand bodies of beverage cans by stamping and drawing without any problem of formability or seizing (no metal adhesion on the drawing rings).

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Table Devices Or Equipment (AREA)
  • Packages (AREA)
  • Metal Rolling (AREA)
  • Coating With Molten Metal (AREA)
  • Forging (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Seeds, Soups, And Other Foods (AREA)

Claims (7)

1. Aluminiumlegierung zur Herstellung von Büchsen, dadurch gekennzeichnet, daß ihre Zusammensetzung die folgende (in Gew.%) ist:
Die Gehalte an Mg und Si liegen im Polygon ABCDE mit Koordinaten:
Figure imgb0007
― der Mn-Gehalt liegt zwischen 0,8 und 1,15%
― der Cu-Gehalt ist unter oder gleich 0,6%
― die Elemente Cr, Zn, Zr, Ti, B können in Gehalten unter je 0,3% vorliegen
― das Eisen ist auf maximal 0,5% begrenzt
― die anderen Elemente sind auf je 0,05% und insgesamt auf 0,15% begrenzt
― Rest Al.
2. Legierung nach dem Anspruch 1, dadurch gekennzeichnet, daß der Mn-Gehalt zwischen 0,85 und 1,10% liegt und der Mg-Gehalt zwischen 0,1 und 0,45% liegt.
3. Legierung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß sie Al₆ (Fe, Mn)― und/oder α Al(Fe, Mn)Si-Ausscheidungen einer Abmessung zwischen 1 und 15 µm in der Enddicke enthält.
4. Verfahren zur Herstellung von Blechen oder Bändern aus einer Legierung gemäß den Ansprüchen 1 bis 3, das die folgenden Schritte aufweist: Gießen der Legierung, Homogenisierung, Warmwalzen, eventuelles Kaltwalzen, Bringen in vollständige Lösung und Abschrecken, eventuelle Alterung, Kaltwalzen mit oder ohne Zwischenbehandlung, dadurch gekennzeichnet, daß die Legierung zwischen 550°C und 600°C während einer Dauer von 6 bis 24 h homogenisiert wird, worauf ein Halten auf einer Temperatur von 450°C bis 550°C, vorzugsweise 480°C bis 510°C, einer Maximaldauer von 4 h folgt, wobei der Abstieg auf die Temperatur des zweiten Haltens mit 20°/h bis 120°/h erfolgt.
5. Verfahren nach dem Anspruch 4, dadurch gekennzeichnet, daß das Metall ein Bringen in Lösung zwischen 540 und 590°C (vorzugsweise zwischen 550 und 570°C) und ein Abschrecken bei einer Dicke zwischen der Dicke am Ausgang des Warmwalzens und der Enddicke durchmacht.
6. Verfahren nach dem Anspruch 5, dadurch gekennzeichnet, daß das Metall unmittelbar nach dem Bringen in Lösung und dem Abschrecken oder nach einem Kaltwalzen bis zu einer Zwischendicke (wobei die Dicke beim Bringen in Lösung und die Enddicke in diesem Bereich erfaßt sind) wenigstens eine Zwischenbehandlung bei einer Temperatur von 100 bis 220°C während einer Dauer von 5 min bis 8 h durchmacht.
7. Verfahren nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß die Endgefügeaushärtung während des Ausbackens der Überzüge erhalten wird.
EP88420210A 1987-06-23 1988-06-21 Legierung auf Aluminiumbasis für Getränkedosen und Verfahren zu ihrer Herstellung Expired - Lifetime EP0300927B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88420210T ATE66699T1 (de) 1987-06-23 1988-06-21 Legierung auf aluminiumbasis fuer getraenkedosen und verfahren zu ihrer herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8709168 1987-06-23
FR8709168A FR2617188B1 (fr) 1987-06-23 1987-06-23 Alliage a base d'al pour boitage et procede d'obtention

Publications (2)

Publication Number Publication Date
EP0300927A1 EP0300927A1 (de) 1989-01-25
EP0300927B1 true EP0300927B1 (de) 1991-08-28

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EP88420210A Expired - Lifetime EP0300927B1 (de) 1987-06-23 1988-06-21 Legierung auf Aluminiumbasis für Getränkedosen und Verfahren zu ihrer Herstellung

Country Status (6)

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EP (1) EP0300927B1 (de)
AT (1) ATE66699T1 (de)
DE (1) DE3864473D1 (de)
ES (1) ES2024683B3 (de)
FR (1) FR2617188B1 (de)
GR (1) GR3002615T3 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH688379A5 (de) * 1994-11-29 1997-08-29 Alusuisse Lonza Services Ag Tiefziehbare und schweissbare Aluminiumlegierung vom Typ AlMgSi
DE10163039C1 (de) * 2001-12-21 2003-07-24 Daimler Chrysler Ag Warm- und kaltumformbares Bauteil aus einer Aluminiumlegierung und Verfahren zu seiner Herstellung
FR2855833B1 (fr) * 2003-06-05 2007-03-16 Pechiney Rhenalu Produit lamine ou file en alliage d'aluminium a bonne resistance a la corrosion
FR2873717B1 (fr) 2004-07-27 2006-10-06 Boxal France Soc Par Actions S Procede de fabrication de boitiers d'aerosols.
US20170175230A1 (en) * 2014-07-04 2017-06-22 Aleris Rolled Products Germany Gmbh Aluminium alloy for use in the building industry
CN104561686A (zh) * 2014-12-31 2015-04-29 东莞市东兴铝业有限公司 能抵受冷热凝变的铝合金材料及其制备工艺

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH624147A5 (de) * 1976-12-24 1981-07-15 Alusuisse
DE2929724C2 (de) * 1978-08-04 1985-12-05 Coors Container Co., Golden, Col. Verfahren zum Herstellen eines Bandes aus einer Aluminiumlegierung für Dosen und Deckel
US4431463A (en) * 1981-02-06 1984-02-14 Vereinigte Deutsche Metallwerke Ag Alloy and process for manufacturing rolled strip from an aluminum alloy especially for use in the manufacture of two-piece cans
JPS57143472A (en) * 1981-03-02 1982-09-04 Sumitomo Light Metal Ind Ltd Manufacture of aluminum alloy sheet for forming

Also Published As

Publication number Publication date
FR2617188B1 (fr) 1989-10-20
GR3002615T3 (en) 1993-01-25
DE3864473D1 (de) 1991-10-02
FR2617188A1 (fr) 1988-12-30
EP0300927A1 (de) 1989-01-25
ES2024683B3 (es) 1992-03-01
ATE66699T1 (de) 1991-09-15

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