EP1466992A1 - A flat rolled semi-finished product from an aluminium alloy - Google Patents

A flat rolled semi-finished product from an aluminium alloy Download PDF

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Publication number
EP1466992A1
EP1466992A1 EP03008147A EP03008147A EP1466992A1 EP 1466992 A1 EP1466992 A1 EP 1466992A1 EP 03008147 A EP03008147 A EP 03008147A EP 03008147 A EP03008147 A EP 03008147A EP 1466992 A1 EP1466992 A1 EP 1466992A1
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EP
European Patent Office
Prior art keywords
semi
soft annealing
finished product
rolled
final
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Granted
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EP03008147A
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German (de)
French (fr)
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EP1466992B1 (en
Inventor
Manfred Mrotzek
Werner Dr. Kehl
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Hydro Aluminium Deutschland GmbH
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Hydro Aluminium Deutschland GmbH
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Application filed by Hydro Aluminium Deutschland GmbH filed Critical Hydro Aluminium Deutschland GmbH
Priority to PT03008147T priority Critical patent/PT1466992E/en
Priority to AT03008147T priority patent/ATE370256T1/en
Priority to ES03008147T priority patent/ES2289201T3/en
Priority to SI200330988T priority patent/SI1466992T1/en
Priority to EP03008147A priority patent/EP1466992B1/en
Priority to DE50307952T priority patent/DE50307952D1/en
Priority to PCT/EP2004/003397 priority patent/WO2004090184A1/en
Priority to KR1020057019198A priority patent/KR100716607B1/en
Priority to US10/551,563 priority patent/US7846277B2/en
Priority to JP2006504929A priority patent/JP2006522868A/en
Publication of EP1466992A1 publication Critical patent/EP1466992A1/en
Publication of EP1466992B1 publication Critical patent/EP1466992B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/001—Aluminium or its alloys

Definitions

  • the invention relates to a flat, rolled aluminum alloy alloy, the aluminum alloy having the following proportions by weight in percent by weight: 2 ⁇ Mg ⁇ 5 Mn ⁇ 0.5 Cr ⁇ 0.35 Si ⁇ 0.4 Fe ⁇ 0.4 Cu ⁇ 0.3 Zn ⁇ 0.3 Ti ⁇ 0.15 Others in total not more than 0.15, individually a maximum of 0.05, remainder Al, wherein the semifinished product has been rolled from a billet and has been subjected in the rolling process at least one intermediate soft annealing between two cold rolling passes and a final soft annealing respectively in a chamber furnace and a method for production of such a flat, rolled semi-finished product.
  • These flat, rolled semi-finished products are Aluminum strips or sheets for further processing by deforming or deep drawing, for example for Production of body panels for the Automotive industry. It is known that Standard alloys such as e.g. AA5052, AA5754 or AA5182, the alloy shares in the specified ranges when thermoforming prone to the formation of Flowing figures, in particular flow lines, are. such Flow figures are for sophisticated demands on the surface in body exterior parts highly undesirable that they are still visible after painting.
  • Standard alloys such as e.g. AA5052, AA5754 or AA5182
  • the present invention is based on the object, a flat, rolled semi-finished aluminum alloy or a method for producing such to provide flat, rolled semi-finished products, which the use of standard alloys without addition of Zn and Cu or other elements without elaborate production facilities and an improved Process reliability with regard to a flow line freedom the deep-drawn or deformed final product guaranteed.
  • the previously derived and indicated object is according to the first teaching of the invention solved by the Forming degree before the first intermediate soft annealing at least 50% and not more than 30% before the final soft annealing and the semi-finished product after the final soft annealing by 0.1 to 0.5% has been stretched.
  • the semifinished product according to the invention has a long duration Shelf life of several years, during which the properties do not change significantly.
  • the manufacturing process for producing the flat, rolled semi-finished product according to the invention a has great robustness.
  • An advantageous embodiment undergoes the Inventive, rolled semi-finished product according to the invention in that the semi-finished product after the final soft annealing by 0.2 to 0.5% has been stretched.
  • the stretching increased by at least 0.2% continue the process reliability in the production of the inventive semi-finished product.
  • the stretching of the flat, rolled semi-finished product can open done in different ways. It is conceivable for example, stretching in a strip stretching machine, however also the stretching with help by alternately diverting the Strip or sheet metal in a so-called leveling system, at which the band at each deflection on the outside Radius is stretched and compressed in the inner radius.
  • the above derived and indicated task by a procedure for the production of a flat, rolled semi-finished product solved an aluminum alloy, in which the semi-finished one having the above alloying parts Rolled bar is rolled in the rolling process at least one Intermediate soft annealing between two cold rolling passes and a final annealing in each case in a chamber furnace is subjected, wherein the degree of deformation before the first Intermediate soft annealing at least 50% and before Final soft annealing is at most 30% and the semi-finished product After final annealing, 0.1 to 0.5% is stretched.
  • the embodiment of the plant for producing a flat, rolled semi-finished product according to the invention an aluminum alloy, in particular a semi-finished product for the manufacture of body panels, has a Hot rolling line 1 with a reversing stand 2 and optional a subsequent multi-stage hot rolling stand 3 on.
  • This hot rolling line 1 is a bar 4, for example made of a standard alloy such as AA5052, AA5754 or AA5182 rolled off and then in a Aufhaspelstation to a coil 5 wound up.
  • the tape After cooling the coil 5, the tape is on a first cold rolling line 6 one or more Subjected to cold rolling passes, with the reduction of Recrystallization temperature of the band of the degree of deformation at least 50%.
  • the cold-rolled, re-coiled band in one Chamber furnace 7 soft annealed.
  • the Soft soft annealing recrystallizes the relatively coarse one Structure of the tape almost completely, so that the tape in soft and recrystallized state after Intermediate annealing is present.
  • the soft-annealed band on a second Cold rolling mill 8 again cold rolling with a Subjected to degree of deformation of at most 30%. Through this Measure will only a small number of defects in the Band generated, so that the band after the last cold rolling has a fine-grained structure.
  • leveling system 10 can also be a Band stretching machine can be used on which the band over his entire cross section is stretched.

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  • Mechanical Engineering (AREA)
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  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
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  • Electric Double-Layer Capacitors Or The Like (AREA)
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Abstract

Flat rolled semi-finished material made from an aluminum alloy has a degree of deformation of at least 50 % before a first intermediate soft annealing step and not more than 30 % before a final soft annealing step. The semi-finished material is drawn by 0.1-0.5 % after the final soft annealing step. The aluminum alloy contains alloying additions (in wt.%) 2-5 magnesium, = 0.5 manganese, = 0.35 chromium, = 0.4 silicon, = 0.4 iron, = 0.3 zinc, = 0.15 titanium. An independent claim is also included for a process for the production of a flat rolled semi-finished material made from an aluminum alloy.

Description

Die Erfindung betrifft ein flächiges, gewalztes Halbzeug aus einer Aluminiumlegierung, wobei die Aluminiumlegierung die folgenden Legierungsanteile in Gewichtsprozenten aufweist: 2 ≤ Mg ≤ 5 Mn ≤ 0,5 Cr ≤ 0,35 Si ≤ 0,4 Fe ≤ 0,4 Cu ≤ 0,3 Zn ≤ 0,3 Ti ≤ 0,15 andere in Summe maximal 0,15, einzeln maximal 0,05, Rest Al, wobei das Halbzeug aus einem Barren abgewalzt worden ist und im Walzprozess mindestens einem Zwischenweichglühen zwischen zwei Kaltwalzstichen und einem Schlussweichglühen jeweils in einem Kammerofen unterworfen worden ist sowie ein Verfahren zur Herstellung eines solchen flächigen, gewalzten Halbzeuges.The invention relates to a flat, rolled aluminum alloy alloy, the aluminum alloy having the following proportions by weight in percent by weight: 2 ≤ Mg ≤ 5 Mn≤0.5 Cr ≤ 0.35 Si ≤ 0.4 Fe ≤ 0.4 Cu ≤ 0.3 Zn≤0.3 Ti ≤ 0.15 Others in total not more than 0.15, individually a maximum of 0.05, remainder Al, wherein the semifinished product has been rolled from a billet and has been subjected in the rolling process at least one intermediate soft annealing between two cold rolling passes and a final soft annealing respectively in a chamber furnace and a method for production of such a flat, rolled semi-finished product.

Bei diesen flächigen, gewalzten Halbzeugen handelt es sich um Aluminiumbänder oder -bleche zur Weiterverarbeitung durch Verformen bzw. Tiefziehen beispielsweise zur Herstellung von Karosserieblechen für die Automobilindustrie. Es ist bekannt, dass Standardlegierungen wie z.B. AA5052, AA5754 oder AA5182, die Legierungsanteile in den angegebenen Bereichen aufweisen, beim Tiefziehen anfällig für die Bildung von Fließfiguren, insbesondere Fließlinien, sind. Derartige Fließfiguren sind für gehobene Ansprüche an die Oberfläche bei Karosserieaußenteilen in hohem Maße unerwünscht, dass sie auch nach dem Lackieren noch sichtbar sind.These flat, rolled semi-finished products are Aluminum strips or sheets for further processing by deforming or deep drawing, for example for Production of body panels for the Automotive industry. It is known that Standard alloys such as e.g. AA5052, AA5754 or AA5182, the alloy shares in the specified ranges when thermoforming prone to the formation of Flowing figures, in particular flow lines, are. such Flow figures are for sophisticated demands on the surface in body exterior parts highly undesirable that they are still visible after painting.

Aus dem Stand der Technik sind darüber hinaus verschiedene Ansätze bekannt, die zu einer Reduzierung bzw. vollständigen Vermeidung der unerwünschten Fließlinien nach dem Verformen bzw. Tiefziehen führen. Hierbei sind insbesondere zu nennen der Zusatz von Zn und/oder Cu, der Entfall der Zwischenweichglühung und/oder die Schlussweichglühung im Durchlaufofen. Die Einstellung der Korngrößen durch den Zusatz von Zn und/oder Cu führt zu einer Erhöhung des Risikos, dass beim Verformen bzw. Tiefziehen eine sogenannte Orangenhaut,entsteht. Bei fehlender Zwischenweichglühung entstehen erhöhte Anforderungen an den Kaltwalzprozess bzw. den vorgelagerten Warmwalzprozess, da die Stichabnahmen beim Kaltwalzen eingeschränkt sind. Die Verwendung eines Durchlaufofens ist schließlich zumindest mit hohen Anschaffungskosten verbunden.In addition, different from the prior art Known approaches that contribute to a reduction or completely avoid the unwanted flow lines lead after deformation or deep drawing. Here are to mention in particular the addition of Zn and / or Cu, the Elimination of intermediate soft annealing and / or Final softening in a continuous furnace. The setting of the Grain sizes by the addition of Zn and / or Cu leads to an increase in the risk of deforming or Deep drawing a so-called orange peel, arises. at lack of Zwischenweichglühung arise increased Requirements for the cold rolling process or the upstream hot rolling process, as the decrease in the Cold rolls are restricted. The use of a Continuous furnace is finally at least high Acquisition costs.

Ferner ist zur Vermeidung von Fließlinien beim Verformen oder Tiefziehen von Halbzeugen aus der US Patentschrift US 4,151,013 ein Herstellverfahren für Halbzeuge bekannt, bei dem ein Barren aus einer Aluminiumlegierung nach dem Warmwalzen direkt oder nach einem Zwischenglühen mit einer Dickenreduktion von mindestens 40%, zumeist 60% - 80%, zu einem Halbzeug kaltgewalzt wird, anschließend das Halbzeug in einem Durchlaufofen einem Schlussweichglühen unterzogen wird und schließlich um 0,25% bis 1% gereckt wird. Es hat sich jedoch gezeigt, dass mit dem bekannten Verfahren hergestellte Halbzeuge eine sichere Vermeidung von Fließlinien beispielsweise in einem nachfolgenden Tiefziehen nicht gewährleisten.Furthermore, to avoid flow lines during deformation or deep drawing of semi-finished products from the US patent specification No. 4,151,013 discloses a production method for semi-finished products, in which an ingot made of an aluminum alloy after the Hot rolling directly or after an intermediate annealing with a Thickness reduction of at least 40%, mostly 60% - 80%, too a semi-finished cold rolled, then the semifinished product subjected to a final soft annealing in a continuous furnace and finally stretched by 0.25% to 1%. It has However, it has been shown that with the known method produced semi-finished products a safe avoidance of Flow lines, for example, in a subsequent Do not warrant thermoforming.

Ausgehend von dem zuvor beschriebenen Stand der Technik liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein flächiges, gewalztes Halbzeug aus einer Aluminiumlegierung bzw. ein Verfahren zur Herstellung eines derartigen flächigen, gewalzten Halbzeuges zur Verfügung zu stellen, welches die Verwendung von Standardlegierungen ohne Zusatz von Zn und Cu oder anderen Elementen ermöglicht, ohne aufwendige Fertigungsanlagen auskommt und eine verbesserte Prozesssicherheit im Hinblick auf eine Fließlinienfreiheit des tiefgezogenen bzw. verformten Endproduktes gewährleistet.Based on the previously described prior art The present invention is based on the object, a flat, rolled semi-finished aluminum alloy or a method for producing such to provide flat, rolled semi-finished products, which the use of standard alloys without addition of Zn and Cu or other elements without elaborate production facilities and an improved Process reliability with regard to a flow line freedom the deep-drawn or deformed final product guaranteed.

Die zuvor hergeleitete und aufgezeigte Aufgabe ist gemäß der ersten Lehre der Erfindung dadurch gelöst, dass der Umformgrad vor dem ersten Zwischenweichglühen mindestens 50 % und vor dem Schlussweichglühen höchstens 30 % beträgt und das Halbzeug nach dem Schlussweichglühen um 0,1 bis 0,5 % gereckt worden ist.The previously derived and indicated object is according to the first teaching of the invention solved by the Forming degree before the first intermediate soft annealing at least 50% and not more than 30% before the final soft annealing and the semi-finished product after the final soft annealing by 0.1 to 0.5% has been stretched.

Zunächst wird durch einen hohen Umformgrad von mindestens 50% vor dem ersten Zwischenglühen ein grobes Gefüge im Halbzeug erzeugt, so dass die Rekristallisationstemperatur der Aluminiumlegierung herabgesetzt wird und eine möglichst vollständige Rekristallisation des Halbzeuges beim Zwischenglühen stattfindet. Beim anschließenden Kaltwalzen mit einem maximalen Umformgrad von 30% werden nur wenige Fehlstellen in das weiche, rekristallisierte Halbzeug eingebracht, so dass das Halbzeug mit einem feinkörnigen Gefüge dem Schlussweichglühen zugeführt wird. Durch die Kombination der vorangegangen Verarbeitungsschritte mit dem abschließenden Recken und den Eigenschaften der Legierung ist überraschender Weise gewährleistet, dass beim Verformen bzw. Tiefziehen des Halbzeuges keine Fließlinien auftreten. Darüber hinaus weist das erfindungsgemäße Halbzeug eine lange Lagerbeständigkeit von mehreren Jahren auf, während derer sich die Eigenschaften nicht wesentlich verändern. Insbesondere ist es nicht notwendig, eine spezielle Korngröße einzustellen, so dass das Risiko des Auftretens einer Orangenhaut beim Verformen entfällt. Es kann also auch mit Korngrößen unter 50 µm eine Fließlinienfreiheit erzielt werden. Schließlich ist kein Weich- bzw. Lösungsglühen im Durchlaufofen mit nachfolgender Abschreckung notwendig. Zusammenfassend kann gesagt werden, dass der Fertigungsprozess zur Herstellung des erfindungsgemäßen flächigen, gewalzten Halbzeuges eine große Robustheit aufweist.First, a high degree of deformation of at least 50% before the first intermediate annealing a rough structure in the Semi-finished produced, so that the recrystallization temperature the aluminum alloy is lowered and one As complete as possible recrystallization of the semifinished product takes place during the intermediate annealing. In the subsequent Cold rolling with a maximum degree of deformation of 30% only a few defects in the soft, recrystallized Introduced semi-finished, so that the semi-finished with a Fine-grained structure is fed to the final soft annealing. By the combination of the preceding Processing steps with the final stretching and The properties of the alloy is surprising ensures that when deforming or deep drawing the Semi-finished no flow lines occur. Furthermore the semifinished product according to the invention has a long duration Shelf life of several years, during which the properties do not change significantly. In particular, it is not necessary to have a special one Adjust grain size, so the risk of occurrence an orange peel during deformation is eliminated. So it can also with grain sizes below 50 microns a flow line freedom be achieved. Finally, no soft or Solution annealing in a continuous furnace with following Deterrence necessary. In summary, it can be said be that the manufacturing process for producing the flat, rolled semi-finished product according to the invention a has great robustness.

Eine vorteilhafte Ausgestaltung erfährt das erfindungsgemäße flächige, gewalzte Halbzeug dadurch, dass das Halbzeug nach dem Schlussweichglühen um 0,2 bis 0,5 % gereckt worden ist. Das Recken um mindestens 0,2 % erhöht weiter die Prozesssicherheit bei der Herstellung des erfindungsgemäßen Halbzeuges.An advantageous embodiment undergoes the Inventive, rolled semi-finished product according to the invention in that the semi-finished product after the final soft annealing by 0.2 to 0.5% has been stretched. The stretching increased by at least 0.2% continue the process reliability in the production of the inventive semi-finished product.

Das Recken des flächigen, gewalzten Halbzeuges kann auf unterschiedliche Art und Weise erfolgen. Denkbar ist beispielsweise das Recken in einer Bandreckanlage aber auch das Recken mit Hilfe durch wechselweises Umlenken des Bandes bzw. Bleches in einer sogenannten Levelling-Anlage, bei der das Band bei jeder Umlenkung auf dem äußeren Radius gereckt und im inneren Radius gestaucht wird.The stretching of the flat, rolled semi-finished product can open done in different ways. It is conceivable for example, stretching in a strip stretching machine, however also the stretching with help by alternately diverting the Strip or sheet metal in a so-called leveling system, at which the band at each deflection on the outside Radius is stretched and compressed in the inner radius.

Weist das Halbzeug eine unter Verwendung des Coil-Coating-Verfahrens nachträglich aufgebrachte Beschichtung auf, so kann durch die damit verbundene Wärmebehandlung die Verformbarkeit des Halbzeuges in nachfolgenden Verformungs- oder Tiefziehschritten verbessert werden, ohne die Fließlinienfreiheit zu beeinträchtigen.Does the semifinished one using the coil coating process subsequently applied coating on, so can through the associated heat treatment the Deformability of the semi-finished product in subsequent Deformation or deep drawing steps are improved, without affecting the flow line freedom.

Gemäß einer zweiten Lehre der Erfindung wird die zuvor hergeleitete und aufgezeigte Aufgabe durch ein Verfahren zur Herstellung eines flächigen, gewalzten Halbzeuges aus einer Aluminiumlegierung gelöst, bei dem das Halbzeug aus einem die oben angegebenen Legierungsanteile aufweisenden Barren abgewalzt wird, im Walzprozess mindestens einem Zwischenweichglühen zwischen zwei Kaltwalzstichen und einem Schlussweichglühen jeweils in einem Kammerofen unterworfen wird, wobei der Umformgrad vor dem ersten Zwischenweichglühen mindestens 50% und vor dem Schlussweichglühen höchstens 30% beträgt und das Halbzeug nach dem Schlussweichglühen 0,1 bis 0,5 % gereckt wird.According to a second teaching of the invention, the above derived and indicated task by a procedure for the production of a flat, rolled semi-finished product solved an aluminum alloy, in which the semi-finished one having the above alloying parts Rolled bar is rolled in the rolling process at least one Intermediate soft annealing between two cold rolling passes and a final annealing in each case in a chamber furnace is subjected, wherein the degree of deformation before the first Intermediate soft annealing at least 50% and before Final soft annealing is at most 30% and the semi-finished product After final annealing, 0.1 to 0.5% is stretched.

Wie oben ausgeführt, weist das nach dem erfindungsgemäßen Verfahren hergestellte Halbzeug eine weiter verbesserte Prozesssicherheit im Hinblick auf die Vermeidung von Fließlinien bei einem nachfolgenden Verformen oder Tiefziehen des Halbzeuges auf. As stated above, that according to the invention Process produced semi-finished a further improved Process reliability with regard to the avoidance of Flow lines in a subsequent deformation or Deep drawing of the semifinished product.

Es gibt nun eine Vielzahl von Möglichkeiten, das flächige, gewalzte Halbzeug gemäß der ersten Lehre der Erfindung bzw. das Verfahren zur Herstellung eines derartigen flächigen, gewalzten Halbzeuges gemäß der zweiten Lehre der Erfindung auszugestalten und weiterzubilden. Hierzu wird beispielsweise verwiesen einerseits auf den dem Patentanspruch 1 nachgeordneten Patentanspruch sowie andererseits auf die nachfolgende Beschreibung in Verbindung mit der Zeichnung.There are a lot of possibilities, the flat, rolled semi-finished product according to the first teaching of the invention or the method for producing such flat, rolled semi-finished product according to the second teaching to design and develop the invention. For this is referenced, for example, on the one hand Claim 1 subordinate claim and on the other hand, to the following description in Connection with the drawing.

In der Zeichnung zeigt die einzige Figur ein Ausführungsbeispiel einer Anlage zur Herstellung eines flächigen, gewalzten Halbzeuges aus einer Aluminiumlegierung gemäß der ersten Lehre der Erfindung bzw. zur Verwirklichung eines Verfahrens zur Herstellung eines solchen flächigen, gewalzten Halbzeuges gemäß der zweiten Lehre der Erfindung.In the drawing, the only figure shows Embodiment of a plant for producing a flat, rolled semi-finished product from a Aluminum alloy according to the first teaching of the invention or for the realization of a method for the production of such a flat, rolled semi-finished product according to the second teaching of the invention.

Das Ausführungsbeispiel der Anlage zur Herstellung eines erfindungsgemäßen flächigen, gewalzten Halbzeuges aus einer Aluminiumlegierung, insbesondere eines Halbzeuges zur Herstellung von Karosserieblechen, weist eine Warmwalzstraße 1 mit einem Reversiergerüst 2 und optional einem anschließenden mehrstufigen Warmwalzgerüst 3 auf. In dieser Warmwalzstraße 1 wird ein Barren 4 beispielsweise aus einer Standardlegierung wie AA5052, AA5754 oder AA5182 abgewalzt und anschließend in einer Aufhaspelstation zu einem Coil 5 aufgehaspelt.The embodiment of the plant for producing a flat, rolled semi-finished product according to the invention an aluminum alloy, in particular a semi-finished product for the manufacture of body panels, has a Hot rolling line 1 with a reversing stand 2 and optional a subsequent multi-stage hot rolling stand 3 on. In This hot rolling line 1 is a bar 4, for example made of a standard alloy such as AA5052, AA5754 or AA5182 rolled off and then in a Aufhaspelstation to a coil 5 wound up.

Nach dem Abkühlen des Coils 5 wird das Band auf einer ersten Kaltwalzstraße 6 einem oder mehreren Kaltwalzstichen unterzogen, wobei zur Reduzierung der Rekristallisationstemperatur des Bandes der Umformgrad mindestens 50 % beträgt.After cooling the coil 5, the tape is on a first cold rolling line 6 one or more Subjected to cold rolling passes, with the reduction of Recrystallization temperature of the band of the degree of deformation at least 50%.

Bei dem dargestellten Ausführungsbeispiel wird das kaltgewalzte, erneut aufgehaspelte Band in einem Kammerofen 7 zwischenweichgeglüht. Beim Zwischenweichglühen rekristallisiert das relativ grobe Gefüge des Bandes nahezu vollständig, so dass das Band in weichem und rekristallisiertem Zustand nach dem Zwischenglühen vorliegt. Anschließend wird das zwischenweichgeglühte Band auf einer zweiten Kaltwalzstraße 8 erneut einem Kaltwalzen mit einem Umformgrad von höchstens 30 % unterzogen. Durch diese Maßnahme wird nur eine geringe Anzahl von Fehlstellen im Band erzeugt, so dass das Band nach dem letzten Kaltwalzen ein feinkörniges Gefüge aufweist.In the illustrated embodiment, the cold-rolled, re-coiled band in one Chamber furnace 7 soft annealed. At the Soft soft annealing recrystallizes the relatively coarse one Structure of the tape almost completely, so that the tape in soft and recrystallized state after Intermediate annealing is present. Subsequently, the soft-annealed band on a second Cold rolling mill 8 again cold rolling with a Subjected to degree of deformation of at most 30%. Through this Measure will only a small number of defects in the Band generated, so that the band after the last cold rolling has a fine-grained structure.

Im Anschluss an den letzten Kaltwalzstich wird das erneut aufgehaspelte Band in einem zweiten Kammerofen 9 einer Schlussweichglühung unterzogen.This will be the case again after the last cold roll pass aufgespinned tape in a second chamber furnace 9 a Subjected to final softening.

Abschließend wird das abgekühlte Band auf einer sogenannten Levelling-Anlage 10 um 0,1 bis 0,5 % gereckt.Finally, the cooled tape on a so-called leveling system 10 stretched by 0.1 to 0.5%.

Statt der Levelling-Anlage 10 kann auch eine Bandreckanlage eingesetzt werden, auf der das Band über seinen gesamten Querschnitt gereckt wird.Instead of the leveling system 10 can also be a Band stretching machine can be used on which the band over his entire cross section is stretched.

Claims (4)

Flächiges, gewalztes Halbzeug aus einer Aluminiumlegierung, wobei die Aluminiumlegierung die folgenden Legierungsanteile in Gewichtsprozenten aufweist: 2 ≤ Mg ≤ 5 Mn ≤ 0,5 Cr ≤ 0,35 Si ≤ 0,4 Fe ≤ 0,4 Cu ≤ 0,3 Zn ≤ 0,3 Ti ≤ 0,15 andere in Summe maximal 0,15, einzeln maximal 0,05, Rest Al,
wobei das Halbzeug aus einem Barren (4) abgewalzt worden ist und im Walzprozess mindestens einem Zwischenweichglühen zwischen zwei Kaltwalzstichen und einem Schlussweichglühen jeweils in einem Kammerofen (7, 9) unterworfen worden ist,
dadurch gekennzeichnet, dass
der Umformgrad vor dem ersten Zwischenweichglühen mindestens 50 % und vor dem Schlussweichglühen höchstens 30 % beträgt und das Halbzeug nach dem Schlussweichglühen um 0,1 bis 0,5 % gereckt worden ist. A flat, rolled semi-finished aluminum alloy, the aluminum alloy having the following proportions by weight in percent by weight: 2 ≤ Mg ≤ 5 Mn≤0.5 Cr ≤ 0.35 Si ≤ 0.4 Fe ≤ 0.4 Cu ≤ 0.3 Zn≤0.3 Ti ≤ 0.15 others in total not more than 0.15, individually not more than 0.05, balance Al,
wherein the semifinished product has been rolled off from a bar (4) and has been subjected in the rolling process to at least one intermediate soft annealing between two cold rolling passes and a final soft annealing respectively in a chamber furnace (7, 9),
characterized in that
the degree of deformation is at least 50% before the first intermediate soft annealing and at most 30% before the final soft annealing and the semi-finished product has been stretched by between 0.1 and 0.5% after final soft annealing. Flächiges, gewalztes Halbzeug nach Anspruch 1,
dadurch gekennzeichnet, dass
das Halbzeug nach dem Schlussweichglühen um 0,2 bis 0,5 % gereckt worden ist.Flat, rolled semi-finished product according to claim 1,
characterized in that
the semi-finished product has been stretched by 0.2 to 0.5% after final soft annealing. Flächiges, gewalztes Halbzeug nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass
das Halbzeug eine unter Verwendung des Coil-Coating-Verfahrens nachträglich aufgebrachte Beschichtung aufweist.Flat, rolled semi-finished product according to claim 1 or 2,
characterized in that
the semifinished product has a subsequently applied coating using the coil coating process. Verfahren zur Herstellung eines flächigen, gewalzten Halbzeugs aus einer Aluminiumlegierung, wobei die Aluminiumlegierung die folgenden Legierungsanteile in Gewichtsprozenten aufweist: 2 ≤ Mg ≤ 5 Mn ≤ 0,5 Cr ≤ 0,35 Si ≤ 0,4 Fe ≤ 0,4 Cu ≤ 0,3 Zn ≤ 0,3 Ti ≤ 0,15 andere in Summe maximal 0,15, einzeln maximal 0,05, Rest Al,
wobei das Halbzeug aus einem Barren (4) abgewalzt wird und im Walzprozess mindestens einem Zwischenweichglühen zwischen zwei Kaltwalzstichen und einem Schlussweichglühen jeweils in einem Kammerofen (7, 9) unterworfen wird,
dadurch gekennzeichnet, dass
der Umformgrad vor dem ersten Zwischenweichglühen mindestens 50 % und vor dem Schlussweichglühen höchstens 30 % beträgt und das Halbzeug nach dem Schlussweichglühen um 0,1 bis 0,5 % gereckt wird.A process for the production of a flat, rolled semi-finished aluminum alloy, the aluminum alloy having the following proportions by weight in percent by weight: 2 ≤ Mg ≤ 5 Mn≤0.5 Cr ≤ 0.35 Si ≤ 0.4 Fe ≤ 0.4 Cu ≤ 0.3 Zn≤0.3 Ti ≤ 0.15 others in total not more than 0.15, individually not more than 0.05, balance Al,
wherein the semifinished product is rolled off from a billet (4) and subjected in the rolling process to at least one intermediate soft annealing between two cold rolling passes and a final annealing respectively in a chamber furnace (7, 9),
characterized in that
the degree of deformation is at least 50% before the first intermediate soft annealing and at most 30% before the final soft annealing and the semi-finished product is stretched by 0.1 to 0.5% after the final soft annealing.
EP03008147A 2003-04-08 2003-04-08 A flat rolled semi-finished product from an aluminium alloy Expired - Lifetime EP1466992B1 (en)

Priority Applications (10)

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PT03008147T PT1466992E (en) 2003-04-08 2003-04-08 A flat rolled semi-finished product from an aluminium alloy
AT03008147T ATE370256T1 (en) 2003-04-08 2003-04-08 FLAT, ROLLED SEMI-PRODUCT MADE OF AN ALUMINUM ALLOY
ES03008147T ES2289201T3 (en) 2003-04-08 2003-04-08 SEMI-ELABORATED PRODUCT LAMINATED FROM AN ALUMINUM ALLOY.
SI200330988T SI1466992T1 (en) 2003-04-08 2003-04-08 A flat rolled semi-finished product from an aluminium alloy
EP03008147A EP1466992B1 (en) 2003-04-08 2003-04-08 A flat rolled semi-finished product from an aluminium alloy
DE50307952T DE50307952D1 (en) 2003-04-08 2003-04-08 Flat, rolled semi-finished aluminum alloy
PCT/EP2004/003397 WO2004090184A1 (en) 2003-04-08 2004-03-31 Flat, rolled semi-finished product made of an aluminum alloy
KR1020057019198A KR100716607B1 (en) 2003-04-08 2004-03-31 Flat, rolled semi-finished product made of an aluminum alloy
US10/551,563 US7846277B2 (en) 2003-04-08 2004-03-31 Planar, rolled semi-finished product of aluminum alloys
JP2006504929A JP2006522868A (en) 2003-04-08 2004-03-31 A method for producing flat rolled semi-finished products made of aluminum alloy.

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EP03008147A EP1466992B1 (en) 2003-04-08 2003-04-08 A flat rolled semi-finished product from an aluminium alloy

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ES2613857T3 (en) 2012-08-22 2017-05-26 Hydro Aluminium Rolled Products Gmbh Intercrystalline corrosion resistant aluminum alloy tape and manufacturing procedure
US9589246B2 (en) * 2014-06-26 2017-03-07 Ford Global Technologies, Llc Marking the surface of metal coils with material property data
CN108611533B (en) * 2018-06-08 2019-12-03 郑州大学 A kind of aluminium alloy and its preparation process for high-throughput continuous casting and rolling narrow crystallization section
CN111054745A (en) * 2019-11-26 2020-04-24 湖南湘投金天钛金属股份有限公司 Preparation method of TB8 titanium alloy sheet
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SI1466992T1 (en) 2007-12-31
JP2006522868A (en) 2006-10-05
US7846277B2 (en) 2010-12-07
ES2289201T3 (en) 2008-02-01
KR20060018212A (en) 2006-02-28
KR100716607B1 (en) 2007-05-10
EP1466992B1 (en) 2007-08-15
DE50307952D1 (en) 2007-09-27
ATE370256T1 (en) 2007-09-15
WO2004090184A1 (en) 2004-10-21
US20070125465A1 (en) 2007-06-07
PT1466992E (en) 2007-09-12

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