EP1749112A2 - Malleable, high mechanical strength aluminum alloy which can be anodized in a decorative manner, method for producing the same and aluminum product based on said alloy - Google Patents

Malleable, high mechanical strength aluminum alloy which can be anodized in a decorative manner, method for producing the same and aluminum product based on said alloy

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Publication number
EP1749112A2
EP1749112A2 EP05759604A EP05759604A EP1749112A2 EP 1749112 A2 EP1749112 A2 EP 1749112A2 EP 05759604 A EP05759604 A EP 05759604A EP 05759604 A EP05759604 A EP 05759604A EP 1749112 A2 EP1749112 A2 EP 1749112A2
Authority
EP
European Patent Office
Prior art keywords
weight
aluminum
alloy
strontium
anodized
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
EP05759604A
Other languages
German (de)
French (fr)
Other versions
EP1749112B1 (en
Inventor
Reiner Steins
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.)
WKW AG
Original Assignee
Erbsloeh AG
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Publication date
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Publication of EP1749112A2 publication Critical patent/EP1749112A2/en
Application granted granted Critical
Publication of EP1749112B1 publication Critical patent/EP1749112B1/en
Not-in-force legal-status Critical Current
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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
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C22C21/04—Modified aluminium-silicon alloys
    • 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
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • 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
    • C22F1/05—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 of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/1266—O, S, or organic compound in metal component
    • Y10T428/12667—Oxide of transition metal or Al

Definitions

  • the invention relates to a decoratively anodizable, easily deformable and mechanically highly resilient aluminum alloy of the AlMgSi type, a semifinished product made of this alloy, in the form of strips, sheets or extruded profiles, and a component, in particular formed and decoratively anodized, made from the aforementioned semifinished products.
  • a method for producing such an aluminum alloy is also within the scope of the invention.
  • Unalloyed aluminum (lxxx alloys), AlMg alloys (5xxx alloys or plated systems of the 8xxx alloy type, cladding made of unalloyed aluminum (lxxx alloy) are generally used to manufacture decorative anodized aluminum sheet components. All of these material classes are not hardenable, ie an increase in strength takes place exclusively by strain hardening, a decrease in succession then by softening annealing. All these systems therefore have in common that their formability and their state of strength due to Semi-finished product delivery state, which can be either solidified by rolling or softened by a subsequent annealing, is fixed. In terms of good formability, it is therefore possible to use these systems in a state of maximum softening and then to form them.
  • the systems can be used in a state of high strength, but the formability for a shaping step is severely limited due to the high initial strength of the delivery state.
  • Heat-hardenable AlMgSi alloys (6xxx) with good formability are known, for example, from EP 0 714 993 and EP 0 81 1 700.
  • the disclosed AlMgSi alloys are also used for the production of strips and sheets. Due to the good deep-drawing properties, they are suitable for the production of body panels for the automotive industry.
  • the alloy composition disclosed therein achieves an optimum between good strength and good forming behavior.
  • these alloys are not decorative, especially not high-gloss, anodizable, since on the one hand the iron content of 0.25 to 0.55% by weight disclosed in EP 0 81 1 700 is too high and leads to a clouding of the anodized layer.
  • the invention has for its object to provide an aluminum alloy for components that have good formability, that have sufficient strength and ductility in the application state and that can be decoratively anodized.
  • This object is achieved with an aluminum alloy with the composition mentioned in claim 1 and the features listed there.
  • the optimal properties with regard to mechanical strength and forming behavior are achieved on the one hand by the proportion of 0.3 to 0.9% by weight of silicon and 0.1 to 0.5% by weight of magnesium, the weight ratio of these two components being adjusted such that a There is an excess of silicon over magnesium, in particular a silicon-magnesium weight ratio of 1.8 to 3.3.
  • the strength is further supported by a proportion of 0.1 to 0.4% by weight of copper, which causes mixed crystal hardening.
  • the good formability is due to the proportion the recrystallization inhibitor (iron, zirconium, chromium, vanadium) ensures. Iron is often present as an impurity in a starting alloy.
  • the alloy according to the invention can be decoratively anodized and shows no yellowish or cloudy anodized layer. This is caused by the proportion of 0.005 to 0.1% by weight of strontium. It is assumed that the strontium changes the phases containing iron zirconium, chromium and / or vanadium, in particular refined to such an extent that, even if they are incorporated in the anodized layer, they do not cause any visible clouding. It has surprisingly been found that a weight ratio of iron to strontium
  • Such an alloy is made of aluminum base material with more than 99.85% by weight of aluminum.
  • the alloy components are added to the melt as follows, namely 0.3 to 0.9% by weight of silicon, 0.1 to 0.5% by weight of magnesium, the weight ratio of silicon to magnesium being 1.8: 1 to 3.3: 1 is.
  • additional iron is added if necessary, so that the alloy to be produced contains up to 0.2% by weight of iron.
  • 0.005 to 0.1% by weight of strontium is added, the weight ratio of iron to strontium being set from 3: 1 to 5: 1.
  • An addition of 0.008 to 0.07% by weight of strontium is preferred.
  • 0.1 to 0.4% by weight of copper, 0.03 to 0.2% by weight of manganese, 0.01% by weight of titanium and zirconium and / or chromium and / or vanadium in total 0.08 to 0.22 are further alloy components % By weight added.
  • the alloy should contain a maximum of 0.04% by weight of zinc and a maximum of 0.02% by weight. contain unavoidable contamination individually or a maximum of 0.15% by weight in total. Furthermore, a certain proportion, namely 0.0005 to 0.005% by weight of silver, can be added to identify the alloy.
  • the melt produced in this way is cast in a continuous casting process to form a rolled ingot or continuous casting bolt and then homogenized (annealing for at least 2 hours at at least 500 ° C.).
  • Pure aluminum with at least 99.85% by weight of aluminum is preferably used as the aluminum base material in order to limit the proportion of impurities; in total, a maximum of 0.15% by weight of unavoidable impurities should not be exceeded.
  • the alloy components can be added in the form of pure metals or master alloys.
  • the strontium is preferably added in the form of an aluminum strontium master alloy, in particular by means of an AlSr3.5 master alloy, an AlSr5 master alloy or an AlSrlO master alloy.
  • extruded or hollow-section sections can be obtained by extrusion, which are usually stretched and assembled by sawing.
  • Subsequent forming in particular cold forming, such as rolling, bending, deep drawing or active media-based sheet metal and tube forming, can be used to produce three-dimensionally shaped raw components from the profile pieces brought to the desired length. Regardless of whether the forming is a bending process, active-media-based forming or deep drawing, the resulting component shows good contour accuracy with very little orange peel formation, caused by low springback. Due to the hardenability of the alloy, the strength and ductility can be adjusted after the forming.
  • chemical and electrolytic treatment of the component follows in particular.
  • Such chemical and electrolytic treatment includes polishing, shining, anodizing, possibly a coloring and a final compression of the components.
  • the resulting anodized layer of the decoratively anodized shaped aluminum component is very satisfactory, it is transparent, ie not cloudy and also not yellowish.
  • Pre-sheets can be obtained from the rolled ingot by hot rolling, which can be further processed by cold rolling and intermediate annealing.
  • further forming steps if necessary recrystallization and / or softening annealing), such as deep drawing, active media-based sheet metal forming, including designing and smoothing or roughening the surfaces and possibly further soft annealing, if necessary mechanical processing, a raw part is formed, which is also subsequently chemically or electrolytically treated with can be provided with a decorative anodized layer.
  • the aluminum alloy has good to very good forming behavior at room temperature with little orange peeling, has stable forming behavior and leads to good contour accuracy of the component.
  • the anodized layer has no defects, on the contrary, even shiny surfaces can be achieved if pure aluminum with at least 99.9% by weight aluminum is used as the base material.
  • Exemplary embodiments of aluminum alloys according to the invention are shown in three tables below.
  • Table 1 shows higher-strength AlMgSi alloys, Table 2 medium-strength AlMgSi alloys and Table 3 low-strength AlMgSi alloys.
  • Known comparative alloys are listed in Table 4, including the applicant's alloy AA6401-special, a medium-strength AlMgSi alloy which has hitherto been used for decorative applications, but which does not show optimum forming behavior.
  • the other comparison alloys represent optimum strength and forming behavior, but cannot be decoratively anodized.
  • An aluminum component was produced according to one of these process variants from an alloy according to the invention by continuous casting, homogenizing, extrusion, stretching, cutting to length, deep drawing, polishing, glossing, anodizing.
  • components of the same shape were produced from a 6401 alloy and a 6016 alloy using the same method.
  • the properties of the components are shown in Table 5.
  • the image sharpness was measured in different surface areas of the finished components. High image sharpness is an expression of a high gloss and high accuracy of an image, i.e. whether lines are displayed straight or distorted.
  • the formability was listed as a comparative degree of deformation.
  • the degrees of deformation were determined from the changed line grid using a deep-drawing-like process. It is clear that the component according to the invention is the only component that has high image sharpness (80%) and good formability (40%).

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
  • Laminated Bodies (AREA)
  • Powder Metallurgy (AREA)
  • Extrusion Of Metal (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Conductive Materials (AREA)
  • Forging (AREA)
  • Eyeglasses (AREA)
  • Adornments (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

The invention relates to a malleable, high mechanical strength aluminum alloy of the AlMgSi type which can be anodized in a decorative manner, to a semifinished product produced from said alloy, in the shape of strips, sheets or extruded profiles, and to a structural component produced from the above semifinished products, especially a reshaped component that has been anodized in a decorative manner. The invention also relates to a method for producing an aluminum alloy component of the above type. Said aluminum alloy has good malleability, achieved by weight percentages of strontium in the alloy and defined weight ratios of silicon to magnesium and iron to strontium.

Description

Dekorativ anodisierbare, gut verformbare, mechanisch hoch belastbare Aluminiumlegierung, Verfahren zu deren Herstellung und Aluminiumprodukt aus dieser LegierungDecorative anodizable, easily deformable, mechanically highly resilient aluminum alloy, process for its production and aluminum product from this alloy
Die Erfindung betrifft eine dekorativ anodisierbare, gut verformbare und mechanisch hoch belastbare Aluminiumlegierung vom Typ AlMgSi, ein Halbzeug aus dieser Legierung, in Form von Bändern, Blechen oder Strangpressprofilen sowie ein aus den vorgenannten Halbzeugen hergestelltes, insbesondere umgeformtes und dekorativ anodisiertes Bauteil. Im Rahmen der Erfindung liegt auch ein Verfahren zur Herstellung einer solchen Aluminiumlegierung.The invention relates to a decoratively anodizable, easily deformable and mechanically highly resilient aluminum alloy of the AlMgSi type, a semifinished product made of this alloy, in the form of strips, sheets or extruded profiles, and a component, in particular formed and decoratively anodized, made from the aforementioned semifinished products. A method for producing such an aluminum alloy is also within the scope of the invention.
Zur Herstellung dekorativ anodisierter Bauteile aus Aluminiumblech werden in der Regel unlegiertes Aluminium (lxxx-Legierungen), AlMg-Legierungen (5xxx-Legierungen oder plattierte Systeme vom Typ 8xxx-Legierung, Plattierung aus unlegiertem Aluminium (lxxx-Legierung) verwendet. All diese Werkstoffklassen sind nicht aushärtbar, d.h. eine Erhöhung der Festigkeit erfolgt ausschließlich durch eine Kaltverfestigung, eine Erniedrigung in Folge dann durch Entfestigungsglühen. All diesen Systemen ist daraus folgend gemein, dass ihr Umformvermögen und ihr Festigkeitszustand durch den Halbzeug-Anlieferungszustand, der beispielsweise entweder verfestigt durch Walzen oder entfestigt durch eine nachfolgende Glühung sein kann, festgelegt ist. Es ist also im Sinne guter Umformbarkeit möglich, diese Systeme in einem Zustand maximaler Entfestigung einzusetzen und dann umzuformen. Nach dem Umformprozess ist jedoch eine Aushärtung zur Verbesserung der Gebrauchseigenschaften nicht mehr gegeben. Im Sinne guter Gebrauchseigenschaften können die Systeme in einem Zustand hoher Festigkeit eingesetzt werden, wobei aber das Umformvermögen für einen formgebenden Schritt, bedingt durch die hohe Anfangsfestigkeit des Anlieferungszustandes, stark eingeschränkt wird.Unalloyed aluminum (lxxx alloys), AlMg alloys (5xxx alloys or plated systems of the 8xxx alloy type, cladding made of unalloyed aluminum (lxxx alloy) are generally used to manufacture decorative anodized aluminum sheet components. All of these material classes are not hardenable, ie an increase in strength takes place exclusively by strain hardening, a decrease in succession then by softening annealing. All these systems therefore have in common that their formability and their state of strength due to Semi-finished product delivery state, which can be either solidified by rolling or softened by a subsequent annealing, is fixed. In terms of good formability, it is therefore possible to use these systems in a state of maximum softening and then to form them. After the forming process, however, curing to improve the properties of use is no longer possible. In terms of good usage properties, the systems can be used in a state of high strength, but the formability for a shaping step is severely limited due to the high initial strength of the delivery state.
Warmaushärtbare AlMgSi-Legierungen (6xxx) mit guter Umformbarkeit sind beispielsweise aus der EP 0 714 993 bzw. EP 0 81 1 700 bekannt. Die offenbarten AlMgSi-Legierungen werden auch zur Herstellung von Bändern und Blechen eingesetzt. Aufgrund der guten Tiefziehbarkeit eignen sie sich zur Herstellung von Karosserieblechen für die Automobilindustrie. Durch die dort offenbarte Legierungszusammensetzung wird ein Optimum zwischen guter Festigkeit und gutem Umformverhalten erreicht. Diese Legierungen sind jedoch nicht dekorativ, vor allem nicht hochglänzend, anodisierbar, da zum einen der in der EP 0 81 1 700 offenbarte Eisengehalt von 0,25 bis 0,55 Gew% zu hoch ist und zu einer Eintrübung der Eloxalschicht führt. Es ist bekannt, dass sich die durch das Eisen gebildeten intermetallischen quaternären FeSiMgMn-Phasen in die Eloxalschicht einbauen. Diese groben Teilchen führen in der Eloxalschicht zu einer Streuung des Lichtes, was dem Betrachter als Eintrübung erscheint. Auch bei den in EP 0 714 993 genannten Gehalten an Vanadium in der Größenordnung von 0.05 bis 0,4 Gew% ist eine nicht ausreichend transparente Eloxalschicht zu erreichen. Vanadium in höheren Gehalten geht ausserdem in der Schmelze schwer in Lösung. Ein Ersatz des Vanadiums durch andere Rekristallisationshemmer, wie Zirconium oder Chrom, erbringt auch nicht das gewünschte Ergebnis. Chrom und Zirkon führen zu einer Eloxalschicht, die beim Polieren bzw. Glanzeloxieren gelbstichig wirkt. Eine bekannte A199,9MgSi-Legierung (6401 spezial) für Strangpressprofile, die von der Anmelderin für dekorative Bauteile eingesetzt wird, enthält daher kein Zirconium, Vanadium oder Chrom. Ebenso wird die Verunreinigung der AlMgSi-Legierung mit Eisen auf 0,04 Gew% Eisen limitiert. Damit ist sichergestellt, dass die vorgenannten Eloxalfehler vermieden werden und ein hoher Glanzgrand des polierten und glanzeloxierten Bauteiles erreicht wird. Eine solche Legierung zeigt jedoch aufgrund der fehlenden Rekristallisationshemmer (Fe, Zr, Cr, V) ein nicht optimales Umformvermögen, da es aufgrund des relativ groben Korns früh zu Einschnürungen und Orangenhaut kommt.Heat-hardenable AlMgSi alloys (6xxx) with good formability are known, for example, from EP 0 714 993 and EP 0 81 1 700. The disclosed AlMgSi alloys are also used for the production of strips and sheets. Due to the good deep-drawing properties, they are suitable for the production of body panels for the automotive industry. The alloy composition disclosed therein achieves an optimum between good strength and good forming behavior. However, these alloys are not decorative, especially not high-gloss, anodizable, since on the one hand the iron content of 0.25 to 0.55% by weight disclosed in EP 0 81 1 700 is too high and leads to a clouding of the anodized layer. It is known that the intermetallic quaternary FeSiMgMn phases formed by the iron are built into the anodized layer. These coarse particles lead to a scattering of light in the anodized layer, which appears to the observer as clouding. An insufficiently transparent anodized layer can also be achieved with the vanadium contents of the order of 0.05 to 0.4% by weight mentioned in EP 0 714 993. Vanadium in higher contents is also difficult to dissolve in the melt. Replacing the vanadium with other recrystallization inhibitors, such as zirconium or chromium, does not produce the desired result. Chromium and zircon lead to an anodized layer that has a yellowish tinge when polished or anodized. A known A199.9 MgSi alloy (6401 special) for extruded profiles, which the applicant uses for decorative components, therefore contains no zirconium, vanadium or chromium. Likewise, the contamination of the AlMgSi alloy with iron is limited to 0.04% by weight iron. This ensures that the aforementioned anodizing errors are avoided and that a high gloss of the polished and anodized component is achieved. However, due to the lack of recrystallization inhibitors (Fe, Zr, Cr, V), such an alloy shows less than optimal formability, since the relatively coarse grain causes constrictions and orange peel at an early stage.
Daraus ergibt sich, dass durch die Auswahl einer Legierungszusammensetzung für ein Strangpress- oder Walzprodukt ein Kompromiss hinsichtlich des Verformungsvermögens, des dekorativem Aussehens und der mechanischen Belastbarkeit, die sich in Endfestigkeit, Duktilität und Zähigkeit ausdrückt, eingegangen wird.It follows that the selection of an alloy composition for an extruded or rolled product compromises the formability, the decorative appearance and the mechanical strength, which is expressed in final strength, ductility and toughness.
Der Erfindung liegt die Aufgabe zugrunde, eine Aluminiumlegierung zur Verfügung zu stellen für Bauteile, die ein gutes Umformvermögen aufweisen, die eine ausreichende Festigkeit und Duktilität im Anwendungszustand aufweisen und die dekorativ anodisierbar sind.The invention has for its object to provide an aluminum alloy for components that have good formability, that have sufficient strength and ductility in the application state and that can be decoratively anodized.
Diese Aufgabe wird mit einer Aluminiumlegierung mit der in Anspruch 1 genannten Zusammensetzung und den dort aufgeführten Merkmalen gelöst. Die optimalen Eigenschaften bezüglich mechanischer Festigkeit und Umformverhalten werden zum einen durch den Anteil von 0,3 bis 0,9 Gew% Silicium und 0,1 bis 0,5 Gew% Magnesium erzielt, wobei das Gewichtsverhältnis dieser beiden Bestandteile so eingestellt wird, dass ein Überschuss an Silicium gegenüber Magnesium vorliegt, insbesondere ein Silicium-Magnesium-Gewichtsverhältnis von 1,8 bis 3,3. Die Festigkeit wird zu dem noch unterstützt durch einen Anteil von 0,1 bis 0,4 Gew% Kupfer, das eine Mischkristallhärtung bewirkt. Das gute Umformvermögen wird durch den Anteil der Rekristallisationshemmer (Eisen, Zirconium, Chrom, Vanadium) gewährleistet. Eisen liegt in einer Ausgangslegierung oft als Verunreinigung vor. Es kann jedoch bis zu einem Anteil von 0,2 Gew% auch zulegiert werden. Zirconium, Chrom und Vanadium können einzeln oder zusammen bis zu einem Anteil von 0,22 Gew% in der Legierung enthalten sein. Trotz des Vorhandenseins der vorgenannten Rekristallisationshemmer ist die erfindungsgemäße Legierung dekorativ anodisierbar und zeigt keine gelbstichige oder trübe Eloxalschicht. Dies wird durch den Anteil von 0,005 bis 0,1 Gew% Strontium bewirkt. Es wird angenommen, dass das Strontium die eisen- zirkon-, chrom- und/oder vanadiumhaltigen Phasen verändert, insbesondere so weit verfeinert, dass sie, auch wenn sie in die Eloxalschicht eingebaut werden, keine sichtbare Trübung bewirken. Es hat sich in überraschender Weise herausgestellt, dass ein Gewichtsverhältnis von Eisen zu StrontiumThis object is achieved with an aluminum alloy with the composition mentioned in claim 1 and the features listed there. The optimal properties with regard to mechanical strength and forming behavior are achieved on the one hand by the proportion of 0.3 to 0.9% by weight of silicon and 0.1 to 0.5% by weight of magnesium, the weight ratio of these two components being adjusted such that a There is an excess of silicon over magnesium, in particular a silicon-magnesium weight ratio of 1.8 to 3.3. The strength is further supported by a proportion of 0.1 to 0.4% by weight of copper, which causes mixed crystal hardening. The good formability is due to the proportion the recrystallization inhibitor (iron, zirconium, chromium, vanadium) ensures. Iron is often present as an impurity in a starting alloy. However, up to 0.2% by weight can also be added. Zirconium, chromium and vanadium can be contained individually or together in an amount of up to 0.22% by weight in the alloy. Despite the presence of the aforementioned recrystallization inhibitors, the alloy according to the invention can be decoratively anodized and shows no yellowish or cloudy anodized layer. This is caused by the proportion of 0.005 to 0.1% by weight of strontium. It is assumed that the strontium changes the phases containing iron zirconium, chromium and / or vanadium, in particular refined to such an extent that, even if they are incorporated in the anodized layer, they do not cause any visible clouding. It has surprisingly been found that a weight ratio of iron to strontium
3 : 1 bis 5 : 13: 1 to 5: 1
sich als besonders vorteilhaft erweist.proves to be particularly advantageous.
Eine solche Legierung wird aus Aluminium-Basiswerkstoff mit mehr als 99,85 Gew% Aluminium hergestellt. Der Schmelze werden die Legierungsbestandteile wie folgt zugesetzt, nämlich 0,3 bis 0,9 Gew% Silicium, 0, 1 bis 0,5 Gew% Magnesium, wobei das Gewichtsverhältnis von Silicium zu Magnesium 1,8 : 1 bis 3,3 : 1 beträgt. Nach Bestimmung des Eisengehaltes des Aluminium- Basiswerkstoffes, der als Verunreinigung im Basiswerkstoff vorliegen kann, wird bei Bedarf weiteres Eisen zulegiert, so dass die herzustellende Legierung bis 0,2 Gew% Eisen enthält. Des Weiteren werden 0,005 bis 0, 1 Gew% Strontium zugegeben, wobei das Gewichtsverhältnis von Eisen zu Strontium von 3 : 1 bis 5 : 1 eingestellt wird. Bevorzugt ist eine Zugabe von 0,008 bis 0,07 Gew% Strontium. Als weitere Legierungsbestandteile werden 0, 1 bis 0,4 Gew% Kupfer, 0,03 bis 0,2 Gew% Mangan, 0,01 Gew% Titan und Zirconium und/oder Chrom und/oder Vanadium insgesamt 0,08 bis 0,22 Gew% zugegeben. Die Legierung sollte maximal 0,04 Gew% Zink, maximal 0,02 Gew% unvermeidbarer Verunreinigung einzeln bzw. maximal 0,15 Gew% insgesamt enthalten. Des Weiteren kann zur Kennzeichnung der Legierung ein bestimmter Anteil, nämlich 0,0005 bis 0,005 Gew% Silber zugesetzt werden.Such an alloy is made of aluminum base material with more than 99.85% by weight of aluminum. The alloy components are added to the melt as follows, namely 0.3 to 0.9% by weight of silicon, 0.1 to 0.5% by weight of magnesium, the weight ratio of silicon to magnesium being 1.8: 1 to 3.3: 1 is. After determining the iron content of the aluminum base material, which may be present as an impurity in the base material, additional iron is added if necessary, so that the alloy to be produced contains up to 0.2% by weight of iron. Furthermore, 0.005 to 0.1% by weight of strontium is added, the weight ratio of iron to strontium being set from 3: 1 to 5: 1. An addition of 0.008 to 0.07% by weight of strontium is preferred. 0.1 to 0.4% by weight of copper, 0.03 to 0.2% by weight of manganese, 0.01% by weight of titanium and zirconium and / or chromium and / or vanadium in total 0.08 to 0.22 are further alloy components % By weight added. The alloy should contain a maximum of 0.04% by weight of zinc and a maximum of 0.02% by weight. contain unavoidable contamination individually or a maximum of 0.15% by weight in total. Furthermore, a certain proportion, namely 0.0005 to 0.005% by weight of silver, can be added to identify the alloy.
Die so hergestellte Schmelze wird im Stranggussverfahren zu einem Walzbarren oder Stranggussbolzen gegossen und anschließend homogenisiert (Glühung für mind. 2h bei mind. 500°C). Als Aluminium-Basiswerkstoff wird vorzugsweise Reinaluminium mit mindestens 99,85 Gew% Aluminium eingesetzt, um den Anteil an Verunreinigungen zu limitieren, insgesamt sollte ein Gehalt von maximal 0,15 Gew% unvermeidbarer Verunreinigungen nicht überschritten werden. Die Legierungsbestandteile können in Form von Reinmetallen oder Vorlegierungen zugegeben werden. Das Strontium wird vorzugsweise in Form einer Aluminium-Strontium- Vorlegierung zugesetzt, insbesondere mittels einer AlSr3,5-Vorlegierung, einer AlSr5-Vorlegierung oder einer AlSrlO- Vorlegierung.The melt produced in this way is cast in a continuous casting process to form a rolled ingot or continuous casting bolt and then homogenized (annealing for at least 2 hours at at least 500 ° C.). Pure aluminum with at least 99.85% by weight of aluminum is preferably used as the aluminum base material in order to limit the proportion of impurities; in total, a maximum of 0.15% by weight of unavoidable impurities should not be exceeded. The alloy components can be added in the form of pure metals or master alloys. The strontium is preferably added in the form of an aluminum strontium master alloy, in particular by means of an AlSr3.5 master alloy, an AlSr5 master alloy or an AlSrlO master alloy.
Aus dem homogenisierten Stranggussbolzen der erfindungsgemäßen Aluminiumlegierung lassen sich durch Strangpressen offene oder Hohlkammerprofilstränge erhalten, die in der Regel gereckt und durch Sägen konfektioniert werden. Aus den auf die gewünschte Länge gebrachten Profilstücken lassen sich durch nachfolgendes Umformen, insbesondere Kaltumformen, wie beispielsweise Walzen, Biegen, Tiefziehen oder wirkmedienbasierte Blech- und Rohrumformung, dreidimensional geformte Rohbauteile herstellen. Unabhängig davon, ob es sich bei dem Umformen um einen Biegeprozess, um eine wirkmedienbasierte Umformung oder Tiefziehen handelt, zeigt das entstehende Bauteil bei einer sehr geringen Orangenhautbildung eine gute Konturgenauigkeit, bewirkt durch eine geringe Rückfederung. Durch die Aushärtbarkeit der Legierung ist im Anschluss an die Umformung die Festigkeit und Duktilität einstellbar. Nach der Aushärtung folgt neben eventuellen mechanischen Bearbeitungen insbesondere eine chemische und elektrolytische Behandlung des Bauteils. Eine solche chemische und elektrolytische Behandlung schließt ein Polieren, Glänzen, Eloxieren, eventuell ein Einfärben und ein abschließendes Verdichten der Bauteile ein. Die entstehende Eloxalschicht des dekorativ anodisierten geformten Aluminium- Bauteils ist sehr zufriedenstellend, sie ist transparent, d.h. nicht eingetrübt und auch nicht gelbstichig.From the homogenized continuous casting bolt of the aluminum alloy according to the invention, extruded or hollow-section sections can be obtained by extrusion, which are usually stretched and assembled by sawing. Subsequent forming, in particular cold forming, such as rolling, bending, deep drawing or active media-based sheet metal and tube forming, can be used to produce three-dimensionally shaped raw components from the profile pieces brought to the desired length. Regardless of whether the forming is a bending process, active-media-based forming or deep drawing, the resulting component shows good contour accuracy with very little orange peel formation, caused by low springback. Due to the hardenability of the alloy, the strength and ductility can be adjusted after the forming. After curing, in addition to any mechanical processing, chemical and electrolytic treatment of the component follows in particular. Such chemical and electrolytic treatment includes polishing, shining, anodizing, possibly a coloring and a final compression of the components. The resulting anodized layer of the decoratively anodized shaped aluminum component is very satisfactory, it is transparent, ie not cloudy and also not yellowish.
Aus dem Walzbarren lassen sich durch Warmwalzen Vorbleche erzielen, die durch Kaltwalzen und Zwischenglühen weiterverarbeitet werden können. Durch weitere Umformschritte (gegebenenfalls Rekristallisations- und/ oder Entfestigungsglühung), wie Tiefziehen, wirkmedienbasiertes Blechumformen, einschließlich Dessinieren sowie Glätten oder Aufrauhen der Oberflächen und eventuell nochmaliges Weichglühen, gegebenenfalls mechanische Bearbeitungen, wird ein Rohbauteil gebildet, welches ebenfalls nachfolgend durch chemische oder elektrolytische Behandlung mit einer dekorativen Eloxalschicht versehen werden kann. Auch bei diesem Herstellungsprozess kann nachgewiesen werden, dass die Aluminiumlegierung ein gutes bis sehr gutes Umformverhalten bei Raumtemperatur bei nur geringer Orangenhautbildung besitzt, ein stabiles Umformverhalten aufweist und zu einer guten Konturgenauigkeit des Bauteils führt. Die Eloxalschicht weist keine Fehler auf, im Gegenteil, sogar glänzende Oberflächen sind realisierbar, wenn als Basiswerkstoff Reinaluminium mit mindestens 99,9 Gew% Aluminium eingesetzt wird.Pre-sheets can be obtained from the rolled ingot by hot rolling, which can be further processed by cold rolling and intermediate annealing. Through further forming steps (if necessary recrystallization and / or softening annealing), such as deep drawing, active media-based sheet metal forming, including designing and smoothing or roughening the surfaces and possibly further soft annealing, if necessary mechanical processing, a raw part is formed, which is also subsequently chemically or electrolytically treated with can be provided with a decorative anodized layer. With this manufacturing process, too, it can be demonstrated that the aluminum alloy has good to very good forming behavior at room temperature with little orange peeling, has stable forming behavior and leads to good contour accuracy of the component. The anodized layer has no defects, on the contrary, even shiny surfaces can be achieved if pure aluminum with at least 99.9% by weight aluminum is used as the base material.
Nachfolgend sind in drei Tabellen Ausführungsbeispiele für erfindungsgemäße Aluminiumlegierungen wiedergegeben. Tabelle 1 zeigt dabei höherfeste AlMgSi-Legierungen, die Tabelle 2 mittelfeste AlMgSi-Legierungen und die Tabelle 3 niedrigfeste AlMgSi-Legierungen. In der Tabelle 4 sind bekannte Vergleichslegierungen aufgeführt, u.a. die Legierung AA6401-spezial der Anmelderin, eine mittelfeste AlMgSi-Legierung, die bisher für dekorative Anwendungen eingesetzt wird, die jedoch kein optimales Umformverhalten zeigt. Die weiteren Vergleichslegierungen stellen ein Optimum an Festigkeit und Umformverhalten da, sind jedoch nicht dekorativ anodisierbar. Eine Übersicht der verschiedenen Verfahrens Varianten zur Herstellung eines dekorativ anodisierten umgeformten Aluminium-Bauteils sind im nachfolgenden Schema verdeutlicht:Exemplary embodiments of aluminum alloys according to the invention are shown in three tables below. Table 1 shows higher-strength AlMgSi alloys, Table 2 medium-strength AlMgSi alloys and Table 3 low-strength AlMgSi alloys. Known comparative alloys are listed in Table 4, including the applicant's alloy AA6401-special, a medium-strength AlMgSi alloy which has hitherto been used for decorative applications, but which does not show optimum forming behavior. The other comparison alloys represent optimum strength and forming behavior, but cannot be decoratively anodized. An overview of the different process variants for the production of a decorative anodized, formed aluminum component is illustrated in the following diagram:
Aluminium-Basis Werkstoff mit mindestens 99,85 Gew% AIAluminum-based material with at least 99.85 wt% AI
Schmelzen/ Giessen Zugabe der erfindungsgemäßen Legierungebestandteile als Reinmetalle oder VorlegierungenMelting / casting addition of the alloy components according to the invention as pure metals or master alloys
Walzbarren oder Stranggussbolzen iRoll ingots or continuous casting bolts i
Homogenisieren! i Homogenisierte Walzbarren/ StranggussbolzenHomogenize! i Homogenized billets / continuous cast billets
Warm-und/oder Kaltumformen Strangpressen zu Profilen, Recken, Streck- oder Rollbiegen, Walzen zum Vorblech, Tiefziehen, wirkmedienbasierte Rohr-/BlechumformungHot and / or cold forming, extrusion to profiles, stretching, stretching or roll bending, rolling to the sheet, deep drawing, active media-based tube / sheet metal forming
evtl. Konfektionieren Sägen, BesäumenPossibly assembling sawing, trimming
[evtl. mechanische Bearbeitung! spanende, nichtspanende Bearbeitung I umgeformtes Rohbauteil i berflächenbehandlungl Polieren, chemisch Glänzen, elektrolytisch Glänzen, Eloxieren, elektrolytisch Färben, Verdichten[Possibly. mechanical machining! Machining, non-machining processing I formed raw part, surface treatment, polishing, chemical shining, electrolytic shining, anodizing, electrolytic coloring, compaction
dekorativ anodisiertes geformtes Aluminium-Bauteil Ein Aluminium-Bauteil wurde nach einer dieser Verfahresvarianten aus einer erfindungsgemäßen Legierung durch Stranggiessen, Homogenisieren, Strangpressen, Recken, Ablängen, Tiefziehen, Polieren, Glänzen, Eloxieren hergestellt. Zum Vergleich wurden nach gleichem Verfahren gleich geformte Bauteile aus einer 6401 -Legierung und einer 6016-Legierung hergestellt. Die Eigenschaften der Bauteile sind in der Tabelle 5 dargestellt. Für die Oberflächeneigenschaften wurde die Abbildungsschärfe in verschiedenen Oberflächenbereichen der fertigen Bauteile gemessen. Hohe Abbildungsschärfen sind Ausdruck für einen hohen Glanz und eine hohe Genauigkeit einer Abbildung, also ob Linien gerade oder verzerrt dargestellt werden. Das Umformvermögen wurde als Vergleichsumformgrad aufgeführt. Dafür wurden unter Zuhilfenahme eines zuvor aufgebrachten Messrasters auf ebene Strangpressprofilstücke der verschiedenen Legierungen nach einem tiefziehähnlichen Prozess die Umformgrade aus dem veränderten Linienraster bestimmt. Es wird deutlich, dass das erfindungs gemäße Bauteil als einziges Bauteil eine hohe Abbildungsschärfe (80%) bei gutem Umformvermögen (40%) zeigt. decorative anodized molded aluminum component An aluminum component was produced according to one of these process variants from an alloy according to the invention by continuous casting, homogenizing, extrusion, stretching, cutting to length, deep drawing, polishing, glossing, anodizing. For comparison, components of the same shape were produced from a 6401 alloy and a 6016 alloy using the same method. The properties of the components are shown in Table 5. For the surface properties, the image sharpness was measured in different surface areas of the finished components. High image sharpness is an expression of a high gloss and high accuracy of an image, i.e. whether lines are displayed straight or distorted. The formability was listed as a comparative degree of deformation. With the help of a previously applied measurement grid on flat extruded sections of the different alloys, the degrees of deformation were determined from the changed line grid using a deep-drawing-like process. It is clear that the component according to the invention is the only component that has high image sharpness (80%) and good formability (40%).
Tabelle 1: Höherfeste AlMgSiTable 1: Higher strength AlMgSi
Tabelle 2: Mittelfeste AlMgSiTable 2: Medium-strength AlMgSi
Tabelle 3: Niedrigfeste AlMgSiTable 3: Low-strength AlMgSi
Tabelle 4: VergleichslegierungenTable 4: Comparative alloys
Tabelle 5 : Eigenschaften der verschiedenen Aluminium-BauteileTable 5: Properties of the various aluminum components

Claims

P a t e n t a n s p r ü c h e : Patent claims:
1 . Dekorativ anodisierbare, gut verformbare, mechanisch hoch belastbare Aluminiumlegierung mit einer Zusammensetzung: 0.3 bis 0.9 Gew% Silicium, 0.1 bis 0.5 Gew% Magnesium, bis 0.2 Gew% Eisen, 0.1 bis 0.4 Gew% Kupfer, 0.03 bis 0.2 Gew% Mangan, 0.01 Gew% Titan, Zirconium und/oder Chrom und/oder Vanadium insgesamt 0.08 bis 0.22 Gew%, , 0.005 bis 0,1 Gew% Strontium, maximal 0.04 Gew% Zink, maximal 0.02 Gew% unvermeidbare Verunreinigungen einzeln, maximal 0.15 Gew% unvermeidbare Verunreinigungen gesamt, der Rest Aluminium, wobei das Gewichtsverhältnis von Silicium zu Magnesium 1 ,8 : 1 bis 3,3 : 1 und dadurch gekennzeichnet, dass das Gewichtsverhältnis von Eisen zu Strontium 3 : 1 bis 5 : 1 beträgt.1 . Decorative anodizable, easily deformable, mechanically highly resilient aluminum alloy with a composition: 0.3 to 0.9% by weight silicon, 0.1 to 0.5% by weight magnesium, up to 0.2% by weight iron, 0.1 to 0.4% by weight copper, 0.03 to 0.2% by weight manganese, 0.01% by weight % Titanium, zirconium and / or chromium and / or vanadium in total 0.08 to 0.22% by weight, .0.005 to 0.1% by weight of strontium, maximum 0.04% by weight zinc, maximum 0.02% by weight of unavoidable impurities individually, maximum 0.15% by weight of unavoidable impurities total , the remainder aluminum, the weight ratio of silicon to magnesium being 1.8: 1 to 3.3: 1 and characterized in that the weight ratio of iron to strontium is 3: 1 to 5: 1.
2. Aluminiumlegierung nach Anspruch 1, dadurch gekennzeichnet, dass 0.008 bis 0.07 Gew% Strontium enthalten sind.2. Aluminum alloy according to claim 1, characterized in that it contains 0.008 to 0.07% by weight of strontium.
3. Aluminiumlegierung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass 0.0005 bis 0.005 Gew% Silber zur Kennzeichnung der Legierung enthalten sind. Verfahren zur Herstellung eines dekorativ anodisierten, geformten Bauteils aus einer Aluminiumlegierung, gekennzeichnet durch folgende3. Aluminum alloy according to claim 1 or 2, characterized in that 0.0005 to 0.005% by weight of silver are included to identify the alloy. A method of manufacturing a decorative anodized, molded component from an aluminum alloy, characterized by the following
V er f ahr ens s ehr itte :V erf ahr ens s hon ittete:
- Schmelzen eines Aluminiumbasiswerkstoff mit mehr als 99,7 Gew% Aluminium und Zugabe von Legierungsbestandteile zur Aluminium- Schmelze bis zu einer Gesamtzusammensetzung von: 0.3 bis 0.9 Gew% Silicium, 0.1 bis 0.5 Gew% Magnesium, wobei das Gewichtsverhältnis von Silicium zu Magnesium 1 ,8 : 1 bis 3,3 : 1 beträgt, bis 0.2 Gew% Eisen, 0,005 bis 0,1 Gew% Strontium, wobei das Gewichtsverhältnis von Eisen zu Strontium 3 : 1 bis 5 : 1 beträgt, 0.1 bis 0.- Melting an aluminum base material with more than 99.7% by weight of aluminum and adding alloy components to the aluminum melt up to a total composition of: 0.3 to 0.9% by weight of silicon, 0.1 to 0.5% by weight of magnesium, the weight ratio of silicon to magnesium being 1, 8: 1 to 3.3: 1, up to 0.2% by weight iron, 0.005 to 0.1% by weight strontium, the weight ratio of iron to strontium being 3: 1 to 5: 1, 0.1 to 0.
4 Gew% Kupfer, 0.03 bis 0.2 Gew% Mangan, 0.01 Gew% Titan, Zirconium und/oder Chrom und/oder Vanadium insgesamt 0.08 bis 0.22 Gew%, maximal 0.04 Gew% Zink, maximal 0.02 Gew% unvermeidbare Verunreinigungen einzeln, maximal 0.15 Gew% unvermeidbare Verunreinigungen gesamt, der Rest Aluminium, Giessen der Aluminiumlegierungsschmelze zu einem Walzbarren oder Stranggussbolzen, Homogenisieren des Walzbarrens oder Stranggussbolzens, Warm- und bedarfsweise Kaltumformen zu einem umgeformten Rohbauteil, Chemische und/ oder elektrolytische Oberflächenbehandlung des umgeformten Rohbauteils, umfassend eine anodische Oxidation. 4% by weight copper, 0.03 to 0.2% by weight manganese, 0.01% by weight titanium, zirconium and / or chromium and / or vanadium in total 0.08 to 0.22% by weight, maximum 0.04% by weight zinc, maximum 0.02% by weight of unavoidable impurities individually, maximum 0.15% by weight % total unavoidable impurities, the rest aluminum, casting the aluminum alloy melt into a rolled ingot or continuous casting bolt, homogenizing the rolling ingot or continuous casting bolt, hot and, if necessary, cold forming into a formed raw component, chemical and / or electrolytic surface treatment of the formed raw component, including anodizing.
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass der Eisengehalt des eingesetzten Aluminiumbasiswerkstoffes bestimmt wird und das gewünschte Gewichtsverhältnis von Eisen zu Strontium durch Zugabe von Strontium und durch Zugabe von weiterem Eisen eingestellt wird.5. The method according to claim 4, characterized in that the iron content of the aluminum base material used is determined and the desired weight ratio of iron to strontium is set by adding strontium and by adding further iron.
6. Verfahren nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass es sich bei dem Aluminiumbasiswerkstoff um Reinaluminium mit mindestens 99,9 Gew% Aluminium handelt.6. The method according to any one of claims 4 or 5, characterized in that the aluminum base material is pure aluminum with at least 99.9% by weight aluminum.
7. Verfahren nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass das Strontium in Form einer Aluminium-Strontium-Vorlegierung zugegeben wird.7. The method according to any one of claims 4 to 6, characterized in that the strontium is added in the form of an aluminum strontium master alloy.
8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass das Strontium in Form einer AlSr5-Vorlegierung, AlSrlO-Vorlegierung oder AlSr3,5- Vorlegierung zugegeben wird.8. The method according to claim 7, characterized in that the strontium is added in the form of an AlSr5 master alloy, AlSrlO master alloy or AlSr3.5 master alloy.
9. Verfahren nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, dass der homogenisierte Walzbarren durch Warmwalzen zu einem Vorblech warmumgeformt wird.9. The method according to any one of claims 4 to 8, characterized in that the homogenized billet is hot-formed by hot rolling to a sheet metal.
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass das Vorblech auf die gewünschte Enddicke mit eventuellen Zwischenglühungen kaltgewalzt wird und nach einer eventuellen Rekristallisations- und/ oder Entfestigungsglühung die Oberfläche dessiniert, geglättet oder aufgerauht wird und eventuell nochmalig einem Weichglühen unterzogen wird und anschließend gewünschte Längen als Blechstücke abgetrennt werden.10. The method according to claim 9, characterized in that the sheet is cold-rolled to the desired final thickness with any intermediate annealing and after a possible recrystallization and / or softening annealing the surface is patterned, smoothed or roughened and possibly subjected to a soft annealing and then desired Lengths are cut as pieces of sheet metal.
1 1. Verfahren nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, dass der homogenisierte Stranggussbolzen durch Strangpressen zu einem offenen oder Hohlkammerprofilstrang warmumgeformt, gereckt und zu Profilstücken abgelängt wird. 1 1. The method according to any one of claims 4 to 8, characterized in that the homogenized continuous casting bolt is hot-formed by extrusion to an open or hollow-section profile strand, stretched and cut into profile pieces.
12. Verfahren nach Anspruch 10 oder 11, dadurch gekennzeichnet, dass die Profilstücke oder die Blechstücke in einem oder mehreren weiteren Schritten kaltumgeformt werden, insbesondere durch Walzen oder Biegen oder Tiefziehen oder wirkmedienbasierte Rohr- oder Blechumformung.12. The method according to claim 10 or 11, characterized in that the profile pieces or the sheet metal pieces are cold formed in one or more further steps, in particular by rolling or bending or deep drawing or active media-based tube or sheet metal forming.
13. Verfahren nach einem der Ansprüche 4 bis 12, dadurch gekennzeichnet, dass umgeformten Rohbauteile poliert, geglänzt, anodisisch oxidiert (eloxiert) und verdichtet werden.13. The method according to any one of claims 4 to 12, characterized in that formed raw components are polished, polished, anodized, oxidized (anodized) and compressed.
14. Verfahren nach Anspruch 13, dadurch gekennzeichnet, dass zusätzlich eine elektrolytische Einfärbung erfolgt.14. The method according to claim 13, characterized in that an electrolytic coloring is additionally carried out.
15. Aluminiumprodukt aus einer Aluminiumlegierung mit einer Zusammensetzung nach einem der Ansprüche 1 bis 3.15. Aluminum product made of an aluminum alloy with a composition according to one of claims 1 to 3.
16. Aluminiumprodukt nach Anspruch 15, dadurch gekennzeichnet, dass das Aluminiumprodukt ein Band, ein Blech, ein Strangpressprofil oder ein aus den vorgenannten Halbzeugen hergestelltes umgeformtes Bauteil ist.16. Aluminum product according to claim 15, characterized in that the aluminum product is a strip, a sheet, an extruded profile or a formed component made from the aforementioned semi-finished products.
17. Aluminiumprodukt nach Anspruch 16, dadurch gekennzeichnet, dass das Aluminiumprodukt ein dekorativ anodisiertes umgeformtes Bauteil ist. 17. Aluminum product according to claim 16, characterized in that the aluminum product is a decoratively anodized formed component.
EP05759604A 2004-05-08 2005-04-30 Malleable, high mechanical strength aluminum alloy which can be anodized in a decorative manner, method for producing the same and aluminum product based on said alloy Not-in-force EP1749112B1 (en)

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CA2563515A1 (en) 2005-11-17
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US20080318081A1 (en) 2008-12-25
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RU2355801C2 (en) 2009-05-20
DE102004022817A1 (en) 2005-12-01
JP4761275B2 (en) 2011-08-31
ATE435310T1 (en) 2009-07-15
EP1749112B1 (en) 2009-07-01
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NO20065655L (en) 2007-02-01
KR100903249B1 (en) 2009-06-17

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