EP2175042B1 - Profilé extrudé en aluminium résistant à la corrosion et procédé de fabrication d'un composant de structure - Google Patents

Profilé extrudé en aluminium résistant à la corrosion et procédé de fabrication d'un composant de structure Download PDF

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Publication number
EP2175042B1
EP2175042B1 EP20090011984 EP09011984A EP2175042B1 EP 2175042 B1 EP2175042 B1 EP 2175042B1 EP 20090011984 EP20090011984 EP 20090011984 EP 09011984 A EP09011984 A EP 09011984A EP 2175042 B1 EP2175042 B1 EP 2175042B1
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EP
European Patent Office
Prior art keywords
alloy
extrusion
heat treatment
corrosion
extruded section
Prior art date
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EP20090011984
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German (de)
English (en)
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EP2175042A1 (fr
Inventor
Hubert Dr. Koch
Jana Dipl.-Ing. Ehrke
Marcel Dr. Rosefort
Dieter Dr. Bramhoff
Horst Gers
Dirk Schnapp
Thomas Dipl.-Ing. Köhler
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.)
Trimet Aluminium SE
Martinrea Honsel Germany GmbH
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Trimet Aluminium SE
Martinrea Honsel Germany GmbH
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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
    • 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
    • C22F1/047—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 of alloys with magnesium as the next major constituent

Definitions

  • the invention relates to a corrosion-resistant aluminum extruded profile of an ALSiMg alloy, preferably a multi-chamber hollow profile and method for
  • the strength of aluminum wrought alloys of the AlMgSi type (6xxxx alloys) is essentially set by the alloying process (D. Altenpohl: "Aluminum viewed from the inside", Aluminum-Verlag). In this case, foreign atoms or precipitates act as impurities in the lattice of the Al microstructure. In the AlMgSi alloy type, it is the Mg 2 Si intermetallic compound which increases strength.
  • N.C. Parson et al. investigated Alloy Extrusion Ingots' microstructural alterations of 6000 series aluminum alloys at different homogenization parameters in The Effect of Heat Treatment.
  • JP 11181539 discloses an Al-Mg-Si-Cu alloy which is free of a recrystallized structure in the surface layer.
  • the aluminum alloy is composed of 0.8-1.2 wt.% Mg, 0.4 to 0.8 wt.% Si, 0.15 to 0.4 wt.% Cu, Al and other substances.
  • JP 2000282162 discloses 6000 series Al alloys with high corrosion protection even in an aggressive environment of Cl ions.
  • the object of the present invention was to produce an extruded profile, with which at least the previously known deformation and corrosion properties are achieved, but with higher strength properties, namely Rp 0.2> 280 MPa, Rm ⁇ 300 MPa and A ⁇ 10%.
  • the extruded profile according to the invention also has a microstructure with molded intermetallic phases of the type alpha-AlFeSi, beta-AlFeSi, Al15FeMn3Si2, Mg2Si, theta-AlCu, the particles of intermetallic phases being globulitically shaped and having a diameter ⁇ 1 ⁇ m.
  • the H 2 content of the melt is adjusted in the usual way by chlorination, by nitrogen or argon rinsing treatment.
  • the alloy is characterized by an excess of Mg, with the preferred weight ratio of magnesium to silicon in the alloy composition ranging from 1 to 2 at an alloy content of Si 0.30-0.60%.
  • the deformation properties and the ductility can be significantly improved if the contents of Mn, Fe, Cu and optionally Ti and Cr are significantly limited (see claim 1).
  • Mn and Cr are added during homogenization form dispersoids which can prevent recrystallization of the microstructure. These dispersoids reduce the local stresses in the structure and thereby increase the ductility.
  • the optimum content for Mn is between 0.05 and 0.10 and for Cr between 0.01 and 0.12%.
  • Titanium also increases ductility, with the content being between 0.01-0.12%.
  • the alloy is cast in a continuous casting process and then homogenized in the temperature range between 450 and 600 ° C in 1-10h.
  • the extruded profile is subjected to an immediate heat treatment in the temperature range 160-250 ° C for 20-1800min.
  • Table 1 Heat treatment and technological properties for four types of alloys according to the invention and two comparative alloys
  • Table 2 Alloy composition of the alloys according to the invention and of the comparative alloys in% by weight
  • Image 1 Microstructure of a structural component produced according to the invention
  • Picture 2 Microstructure of a structural component according to the prior art
  • Picture 3 Profile cross-section of the examined structural component
  • test numbers I to VI Six different hollow profiles (test numbers I to VI) with the homogenization conditions specified in Table 1 were produced by extrusion and subsequently heat-treated.
  • test numbers III, IV, V and VI showed good deformation and corrosion properties with increased strength and acceptable elongation values.
  • the special properties are based on the fact that the intermetallic phases of the type Mg 2 Si, Al 3 Fe, Al 2 Cu were formed during the heat treatment, so that globulitic particles ⁇ 1 ⁇ were uniformly distributed. This is shown by the micrograph Figure 1 for a hollow profile of the invention produced according to the invention V1 according to Table 2.
  • the hollow profile produced according to the prior art by heat treatment to the state T6 with Mg deficit according to test number I shows a significantly poorer deformation behavior.
  • the reason for this lies in the needle-shaped to plate-shaped structures of the intermetallic compounds, as the micrograph figure 2 shows.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Extrusion Of Metal (AREA)
  • Continuous Casting (AREA)
  • Powder Metallurgy (AREA)

Claims (6)

  1. Profilé résistant à la corrosion qui est obtenu par filage à partir d'un alliage AlSiMg, s'agissant préférentiellement d'un profilé creux à plusieurs chambres, caractérisé par la composition d'alliage suivant en % en poids :
    Si 0,30 - 0,60 %
    Mg 0,8 - 1,2 %
    Mn 0,05 - 0,10 %
    Fe 0,1 - 0,3 %
    Cu 0,1 - 0,3 %
    ainsi que
    Ti 0,01 - 0,12 % et, optionnellement,
    Cr 0,01 - 0,12 %;
    le reste étant de l'aluminium pur et des impuretés résultant de la fabrication ; ledit profilé obtenu par filage présentant en outre une microstructure avec des phases intermétalliques globulisées de type alpha-AlFeSi, beta-AlFeSi, Al15FeMn3Si2, Mg2Si, theta-AlCu,
    et les particules constituées de phases intermétalliques présentant une forme équiaxe et un diamètre ≤ 1 µm.
  2. Profilé obtenu par filage selon la revendication 1, caractérisé par
    Si 0,40 - 0,60 %
    Mg 0,82 - 0,90 %
    Cu 0,15 - 0,25 %.
  3. Profilé obtenu par filage selon l'une des revendications précédentes, caractérisé en ce que, dans la composition d'alliage, le rapport pondéral entre le magnésium et le silicium est compris entre 1 et 2.
  4. Procédé de fabrication d'un profilé obtenu par filage selon l'une des revendications précédentes, en mettant en oeuvre une coulée continue, une homogénéisation et, immédiatement après ledit filage, un traitement thermique, caractérisé en ce que l'on réalise un alliage selon les revendications précédentes et l'on met en oeuvre ladite homogénéisation pendant 1 à 10 heures entre 450 °C et 600 °C, puis l'on procède, immédiatement après le filage, à un traitement thermique mis en oeuvre pendant 20 à 1800 minutes dans une fourchette allant de 160 °C à 260 °C.
  5. Procédé selon la revendication 4, caractérisé en ce que, après ledit filage, le traitement thermique est mis en oeuvre pendant 100 à 1000 minutes à une température comprise entre 180 °C et 250 °C.
  6. Procédé selon la revendication 4 ou 5, caractérisé en ce que; préalablement à la coulée continue, la matière en fusion présente une teneur en H2 < 0,15 cm3/100 g d'Al.
EP20090011984 2008-09-22 2009-09-21 Profilé extrudé en aluminium résistant à la corrosion et procédé de fabrication d'un composant de structure Active EP2175042B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810048374 DE102008048374B3 (de) 2008-09-22 2008-09-22 Korrosionsbeständiges Aluminiumstrangpressprofil und Verfahren zur Herstellung eines Strukturbauteiles

Publications (2)

Publication Number Publication Date
EP2175042A1 EP2175042A1 (fr) 2010-04-14
EP2175042B1 true EP2175042B1 (fr) 2015-03-04

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EP20090011984 Active EP2175042B1 (fr) 2008-09-22 2009-09-21 Profilé extrudé en aluminium résistant à la corrosion et procédé de fabrication d'un composant de structure

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EP (1) EP2175042B1 (fr)
DE (1) DE102008048374B3 (fr)
ES (1) ES2537781T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011134486A1 (fr) 2010-04-26 2011-11-03 Sapa Ab Matériau à base d'aluminium tolérant aux dommages à microstructure stratifiée
PL2841611T3 (pl) 2012-04-25 2018-09-28 Norsk Hydro Asa WYCISKANY PROFIL STOPU ALUMINIUM Al-Mg-Si O POLEPSZONYCH WŁAŚCIWOŚCIACH
CA2817425C (fr) 2012-05-31 2020-07-21 Rio Tinto Alcan International Limited Alliage d'aluminium combinant une resistance, une elongation et une extrudabilite elevees
CN103060634A (zh) * 2012-12-31 2013-04-24 张家港市金邦铝业有限公司 一种轻质高强度铝梯型材
US11345980B2 (en) 2018-08-09 2022-05-31 Apple Inc. Recycled aluminum alloys from manufacturing scrap with cosmetic appeal
EP3938554B1 (fr) 2019-03-13 2023-09-06 Novelis, Inc. Alliages d'aluminium durcissables par vieillissement et à formabilité élevée, feuille monolithique fabriquée à partir de ces derniers et produit en alliage d'aluminium plaqué la comprenant
CN118006983A (zh) * 2022-11-09 2024-05-10 北京车和家汽车科技有限公司 一种铝合金材料及其制备方法和应用

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3104189A (en) * 1960-10-17 1963-09-17 Reynolds Metals Co Aluminum alloy system
US3370943A (en) * 1965-11-04 1968-02-27 Kaiser Aluminium Chem Corp Aluminum alloy
US5223050A (en) * 1985-09-30 1993-06-29 Alcan International Limited Al-Mg-Si extrusion alloy
JP3306363B2 (ja) 1997-12-22 2002-07-24 住友軽金属工業株式会社 耐粒界腐食性に優れたアルミニウム合金押出材およびその製造方法
CA2266193C (fr) 1998-03-20 2005-02-15 Alcan International Limited Alliages d'aluminium extrudables
CZ302998B6 (cs) * 1999-02-12 2012-02-15 Norsk Hydro Asa Zpusob zpracování slitiny hliníku
JP2000282162A (ja) 1999-03-30 2000-10-10 Nippon Steel Corp 腐食疲労強度に優れたアルミニウム合金押出材
NO312597B1 (no) * 2000-11-08 2002-06-03 Norsk Hydro As En metode for tildannelse av formede produkter av en aluminiumslegering samt anvendelse av samme
US6565984B1 (en) * 2002-05-28 2003-05-20 Applied Materials Inc. Clean aluminum alloy for semiconductor processing equipment
DE102004030021B4 (de) * 2003-07-09 2009-11-26 Aleris Aluminum Duffel Bvba Gewalztes Produkt
EP1808240B1 (fr) * 2004-10-25 2011-02-16 Showa Denko K.K. Appareil et procédé de coulage continu

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EP2175042A1 (fr) 2010-04-14
ES2537781T3 (es) 2015-06-12
DE102008048374B3 (de) 2010-04-15

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