EP1483422A2 - Dünne streifen aus aluminium-eisen-legierung - Google Patents

Dünne streifen aus aluminium-eisen-legierung

Info

Publication number
EP1483422A2
EP1483422A2 EP03739530A EP03739530A EP1483422A2 EP 1483422 A2 EP1483422 A2 EP 1483422A2 EP 03739530 A EP03739530 A EP 03739530A EP 03739530 A EP03739530 A EP 03739530A EP 1483422 A2 EP1483422 A2 EP 1483422A2
Authority
EP
European Patent Office
Prior art keywords
strip
strips
alloy
thickness
aluminium
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.)
Granted
Application number
EP03739530A
Other languages
English (en)
French (fr)
Other versions
EP1483422B1 (de
Inventor
Jacques Gagniere
Rapha[L Wietzke
Jean-Marie Feppon
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.)
Novelis Inc Canada
Original Assignee
Novelis Inc Canada
Pechiney Rhenalu SAS
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 Novelis Inc Canada, Pechiney Rhenalu SAS filed Critical Novelis Inc Canada
Publication of EP1483422A2 publication Critical patent/EP1483422A2/de
Application granted granted Critical
Publication of EP1483422B1 publication Critical patent/EP1483422B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon

Definitions

  • the invention relates to thin strips, typically of thickness between 30 and 150 ⁇ m, made of an alloy of the aluminum-iron type, suitable for stamping, intended in particular for packaging, and more particularly for the manufacture of trays and thin dishes for food distribution and fast food.
  • Al-Fe alloys of the 8000 series according to the nomenclature of the Aluminum Association are widely used for the manufacture of thin sheets or bands intended for packaging. Their manufacture can be done, either conventionally by casting a plate, hot rolling, then cold rolling, with one or more intermediate anneals and most often a final annealing, or by continuous casting, for example between two rolls, and cold rolling, and optionally one or more anneals.
  • Continuous strip casting allows, for a moderate investment cost, to obtain in a fairly wide range of alloys strips which do not require subsequent hot rolling.
  • significant progress has been made by the manufacturers of casting machines to reduce the thickness of the casting strip which can in certain cases go down to around 1 mm, which consequently reduces cold rolling to carry out.
  • US Patent 5,380,379 of Alcoa Aluminio de Nordeste relates to the manufacture, by continuous casting between cylinders, of very thin sheets of alloys containing 1.35 to 1.6% of iron, of 0.3 to 0.6% of manganese , 0.1 to 0.4% copper and less than 0.2% silicon.
  • the silicon content is limited by the appearance of intermetallic phases of the AlFeSi or AIMnSi type, while the presence of copper is necessary to give the product sufficient mechanical strength.
  • Patent application WO 98/52707 to the applicant describes a process for the production of aluminum alloy strips containing (by weight) at least one of the elements Fe (from 0.15 to 1.5%) or Mn ( 0.35 to 1.9%) with Fe + Mn ⁇ 2.5%, and possibly containing Si ( ⁇ 0.8%), Mg ( ⁇ 0.2%), Cu ( ⁇ 0.2%) by continuous casting between cooled and hooped rolls between 1 and 5 mm thick, followed by cold rolling.
  • the strips obtained have both a higher yield strength than that of the strips resulting from the conventional process, and good formability.
  • the invention aims to improve the compromise between the mechanical strength, the formability and the isotropy of the mechanical properties compared to this reference alloy.
  • the subject of the invention is strips of aluminum alloy with a thickness between 30 and 150 ⁇ m, of an alloy of composition (% by weight):
  • the invention also relates to a process for manufacturing strips of alloy of this composition by continuous casting between cylinders with a strip of thickness between 2 and 10 mm, optionally the homogenization of this strip between
  • the invention also relates to the use of these strips for dishes and trays for food products.
  • the alloy used for the sheets and strips according to the invention is characterized by an iron content of between 1.5 and 1.9%, higher than that usually used for the alloy 8021B intended for the manufacture of dishes and trays .
  • the advantage of a higher iron content lies in the improvement of the mechanical resistance; this effect is even more marked when the strips are obtained by continuous casting between cylinders.
  • the iron content must remain below 1.9% to avoid getting too close to the AlFe eutectic content, and therefore to see coarse primary phases AlFe appear.
  • the other characteristic is a manganese content between 0.04 and 0.15%.
  • This addition has a favorable effect on the mechanical strength, while maintaining a high level of elongation, the compromise between these usually antagonistic properties being markedly improved when the strips are produced by continuous casting. Above 0.15% manganese, it plays its anti-recrystallizing role more clearly, which risks harming the efficiency of the final annealing, necessary for obtaining good isotropy of the mechanical characteristics.
  • the manufacture of sheets and strips according to the invention is preferably done by continuous casting of a strip of thickness between 2 and 10 mm between two cooled and hooped cylinders ("twin-roll casting").
  • the casting strip can be homogenized, especially in the case where it is desired to favor the elongation rather than the mechanical strength. This homogenization must be done at a temperature not too high, between 420 and 550 ° C, to avoid degrading the mechanical strength too much. If the elongation requirements are less restrictive, homogenization is not essential.
  • the strip is then cold rolled with the number of passes required up to the final thickness of between 30 and 150 ⁇ m.
  • This cold rolling can be done with or without intermediate annealing.
  • intermediate annealing it must be relatively short, of the order of 1 to 4 hours, and be carried out at a temperature not too high, typically between 300 and 350 ° C, to avoid a magnification of the grain.
  • a temperature not too high typically between 300 and 350 ° C
  • the laminated strip is then annealed at a temperature between 200 and 400 ° C, for a duration of at least 30 h, so as to obtain a recrystallized structure.
  • This annealing can be carried out in one or more temperature stages, for example a first stage between 200 and 300 ° C, and a second between 300 and 400 ° C.
  • the strip is then cut into sheets if necessary.
  • An improvement in the tensile strength R m and the elastic limit R 0 is thus obtained ; of the order of 5% compared to the conventional 8021B alloy, with an elongation of the same order and a smaller difference between the values of Rm and R0.2 measured in the direction of rolling (long direction) and in the perpendicular direction (cross direction).
  • alloys E and F leads to the same remarks as to the two preceding examples.
  • introduction of homogenization leads to the alloy F, compared with the alloy D of Example 2, to a slight decrease in R m and R 0j 2, and a slight improvement in the elongation .
  • the introduction into the range of homogenization and / or intermediate annealing depends on the compromise sought between mechanical strength and formability.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Laminated Bodies (AREA)
  • Cookers (AREA)
  • Continuous Casting (AREA)
  • Table Devices Or Equipment (AREA)
  • Soft Magnetic Materials (AREA)
  • Clamps And Clips (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
EP03739530A 2002-02-15 2003-02-12 Verwendung von dünnen band aus aluminium-eisen-legierung Expired - Lifetime EP1483422B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0201959 2002-02-15
FR0201959A FR2836154B1 (fr) 2002-02-15 2002-02-15 Bandes minces en alliage aluminium-fer
PCT/FR2003/000452 WO2003069003A2 (fr) 2002-02-15 2003-02-12 Bandes minces en alliage aluminium-fer

Publications (2)

Publication Number Publication Date
EP1483422A2 true EP1483422A2 (de) 2004-12-08
EP1483422B1 EP1483422B1 (de) 2008-04-16

Family

ID=27636231

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03739530A Expired - Lifetime EP1483422B1 (de) 2002-02-15 2003-02-12 Verwendung von dünnen band aus aluminium-eisen-legierung

Country Status (11)

Country Link
US (1) US20050207934A1 (de)
EP (1) EP1483422B1 (de)
AT (1) ATE392489T1 (de)
AU (1) AU2003226882A1 (de)
BR (1) BR0307633A (de)
CA (1) CA2475700A1 (de)
DE (1) DE60320387T2 (de)
FR (1) FR2836154B1 (de)
NO (1) NO20043388L (de)
RU (1) RU2004127592A (de)
WO (1) WO2003069003A2 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2857981A1 (fr) * 2003-07-21 2005-01-28 Pechiney Rhenalu FEUILLES OU BANDES MINCES EN ALLIAGES AIFeSI
DE602006004594D1 (de) † 2005-06-29 2009-02-12 Novelis Inc Folie aus aluminiumlegierung und verfahren zu deren herstellung
US20100084053A1 (en) * 2008-10-07 2010-04-08 David Tomes Feedstock for metal foil product and method of making thereof
FR2957280B1 (fr) 2010-03-12 2012-07-13 Centre Nat Rech Scient Procede de fabrication d'un complexe metallique
ES2655296T3 (es) 2014-07-09 2018-02-19 Hydro Aluminium Rolled Products Gmbh Uso de una aleación de aluminio o de un producto plano de aluminio a partir de una tal aleación para un componente de material compuesto de aluminio-plástico
EP3235916B1 (de) 2016-04-19 2018-08-15 Rheinfelden Alloys GmbH & Co. KG Gusslegierung
JP7153469B2 (ja) * 2018-05-29 2022-10-14 株式会社Uacj 成形性、強度及び外観品質に優れたアルミニウム合金板及びその製造方法
EP4015658A1 (de) * 2020-12-18 2022-06-22 Speira GmbH Aluminiumfolie mit verbesserter barriereeigenschaft

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE58905829D1 (de) * 1988-09-27 1993-11-11 Alusuisse Lonza Services Ag Kathodenfolie für Elektrolytkondensatoren.
US5380379A (en) * 1993-08-18 1995-01-10 Alcoa Aluminio Do Nordeste S.A. Aluminum foil product and manufacturing method
GB9405415D0 (en) * 1994-03-18 1994-05-04 Alcan Int Ltd Aluminium foil
FR2763602B1 (fr) * 1997-05-20 1999-07-09 Pechiney Rhenalu Procede de fabrication de bandes en alliages d'aluminium par coulee continue mince entre cylindres

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03069003A2 *

Also Published As

Publication number Publication date
NO20043388L (no) 2004-11-15
WO2003069003A2 (fr) 2003-08-21
FR2836154A1 (fr) 2003-08-22
AU2003226882A1 (en) 2003-09-04
ATE392489T1 (de) 2008-05-15
DE60320387D1 (de) 2008-05-29
BR0307633A (pt) 2005-01-11
DE60320387T2 (de) 2008-08-07
WO2003069003A3 (fr) 2004-03-25
FR2836154B1 (fr) 2004-10-22
CA2475700A1 (fr) 2003-08-21
EP1483422B1 (de) 2008-04-16
RU2004127592A (ru) 2005-05-10
US20050207934A1 (en) 2005-09-22

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