EP0394816A1 - Rolled aluminium semi-finished product and process for its production - Google Patents

Rolled aluminium semi-finished product and process for its production Download PDF

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Publication number
EP0394816A1
EP0394816A1 EP90107320A EP90107320A EP0394816A1 EP 0394816 A1 EP0394816 A1 EP 0394816A1 EP 90107320 A EP90107320 A EP 90107320A EP 90107320 A EP90107320 A EP 90107320A EP 0394816 A1 EP0394816 A1 EP 0394816A1
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EP
European Patent Office
Prior art keywords
weight
production
rolled aluminium
semifinished product
finished product
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.)
Withdrawn
Application number
EP90107320A
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German (de)
French (fr)
Inventor
Jochen Dr. Hasenclever
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.)
Vaw Aluminium AG
Original Assignee
Vereinigte Aluminium Werke AG
Vaw Aluminium AG
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Publication date
Application filed by Vereinigte Aluminium Werke AG, Vaw Aluminium AG filed Critical Vereinigte Aluminium Werke AG
Publication of EP0394816A1 publication Critical patent/EP0394816A1/en
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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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon

Definitions

  • the invention relates to an aluminum rolled semi-finished product in the form of sheets, strips or foils, consisting of an aluminum alloy of the AlFeMn type with a uniform, fine-grained structure, and a method for its production.
  • grains in the order of magnitude of 15-100 .mu.m are produced after final annealing using customary manufacturing processes, the grain size being the average diameter of all the grains present.
  • the softening behavior is such that material states with high strength values and at the same time high elongation values can only be used using special measures such as high cooling rate can be achieved.
  • the elongation is not sufficient for the production of deep-drawable material, e.g. Flat band or the strength is too low with sufficient stretch.
  • the object of the present invention is to provide an aluminum rolled semi-finished product of the type mentioned at the outset and a method for its production which has a grain structure with grain sizes of ⁇ 15 ⁇ m and finely dispersed, rounded intermetallic phases. According to the invention, this object is achieved by the features specified in the patent claims.
  • Another continuous cast ingot of the same size was made from the alloy as above with an additional 0.5 wt% Mg content.
  • the ingot was homogenized at 550 ° C for 7 hours.
  • Hot rolling and cold rolling were carried out as described with a subsequent final annealing at 350 ° C. for 2 hours.
  • the grain size of the thin strip obtained was between 8 and 11 ⁇ m in diameter.

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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)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)

Abstract

In the case of rolled aluminium products, grains of the order of magnitude of 15 - 100 mu m are formed after use of conventional production processes, during final annealing. Where the strength is sufficiently high, the elongation is not sufficient for the production of deep-drawable material, or the strength is too low when the elongation is sufficient. It is intended to produce a rolled aluminium semifinished product which has a grain microstructure with particle sizes < 15 mu m and finely dispersed round intermetallic phases. <??>The rolled aluminium semifinished product according to the invention is characterised by the following alloy composition: Fe: 0.7 - 1.15% by weight Mn: 0.5 - 2.0% by weight Si: < 0.6% by weight other impurities not more than 0.03% by weight, remainder aluminium, where the grain diameter of the microstructure is 5 to 15 mu m and the content of rod-shaped intermetallic phases is < 5% by volume. The rolled aluminium semifinished product is produced by hot-rolling a continuously cast ingot after homogenisation at temperatures between 300 and 640 DEG C and subsequent cold-rolling followed by final annealing at temperatures below 550 DEG C. <??>The rolled aluminium semifinished product according to the invention is particularly suitable for the production of plate strip, offset tape and lamellar tape and also for packaging foil.

Description

Die Erfindung betrifft ein Aluminiumwalzhalbzeug in Form von Blechen, Bänderung oder Folien, bestehend aus einer Aluminium­legierung vom Typ AlFeMn mit einem gleichmäßigen, feinkörnigen Gefüge sowie ein Verfahren zu seiner Herstellung.The invention relates to an aluminum rolled semi-finished product in the form of sheets, strips or foils, consisting of an aluminum alloy of the AlFeMn type with a uniform, fine-grained structure, and a method for its production.

Aus Altenpohl "Aluminium von innen betrachtet", 2. Auflage, 1970, S. 102, ist es bekannt, daß man bei der Herstellung von Halbzeug, welches erhöhte Anforderungen an die Umformbarkeit zu erfüllen hat, eine Hochglühung bei Temperaturen zwischen 550 und 630 °C durchführt. Die Glühdauer richtet sich nach der Korngröße und der Diffusionsgeschwindigkeit der maßgeben­den Legierungskomponente. Ist eine Legierungskomponente bei maximal möglicher Hochglühungstemperatur nach dem Zustands­diagramm nicht mehr ganz im Aluminium löslich, so vollzieht sich eine feinverteilte Ausscheidung im Innern und an den Korngrenzen der Gußkörner. Der Einfluß der Abkühlung nach der Hochglühung ist bei einer Legierung mit 1 % Mn, 0,67 % Fe und 0,16 % Si, Rest Al an drei Gefügebildern auf S. 101 dar­gestellt.From Altenpohl "Aluminum viewed from the inside", 2nd edition, 1970, p. 102, it is known that in the production of semi-finished products, which have to meet increased requirements for formability, a high-temperature glow at temperatures between 550 and 630 ° C performs. The annealing time depends on the grain size and the rate of diffusion of the relevant alloy component. If an alloy component is no longer completely soluble in aluminum at the maximum possible annealing temperature according to the state diagram, then a finely divided separation takes place inside and at the grain boundaries of the cast grains. The influence of cooling after high-temperature annealing is shown for an alloy with 1% Mn, 0.67% Fe and 0.16% Si, rest Al in three micrographs on p. 101.

Aus der gleichen Veröffentlichung, letzte Seite, ist eine Übersicht über Vorgänge im Gefüge im Verlauf der wichtigsten Stadien der Fertigung von Walzhalbzeugen bekannt. Nach dem Kaltverformen wird danach zur Verbesserung der Verformbarkeit üblicherweise eine Weichglühung bei Temperaturen von ca. 250 - 500 °C durchgeführt. Durch Rekristallisation wird die Verformungsverfestigung beseitigt und im Mikrogefüge treten zahlreiche feine Einlagerungen von Legierungsmetallen auf, die sich bei der Weichglühung ausscheiden.From the same publication, last page, an overview of processes in the structure in the course of the most important stages in the manufacture of semi-finished rolled products is known. After cold working, soft annealing is usually carried out at temperatures of approx. 250 - 500 ° C to improve the formability. The deformation hardening is eliminated by recrystallization and numerous fine deposits of alloy metals appear in the microstructure, which are eliminated in the soft annealing.

Bei Aluminiumwalzprodukten der bekannten Legierung entstehen nach Anwendung üblicher Fertigungsverfahren bei einer Endglühung Körner in der Größenordnung von 15 - 100 µm, wobei als Korn­größe jeweils der durchschnittliche Durchmesser aller vorliegen­den Körner angegeben ist.In the case of aluminum rolled products of the known alloy, grains in the order of magnitude of 15-100 .mu.m are produced after final annealing using customary manufacturing processes, the grain size being the average diameter of all the grains present.

Außerdem ist das Entfestigungsverhalten derart, daß Werkstoffzu­stände mit hohen Festigkeitswerten und gleichzeitig hohen Deh­nungswerten nur unter Einsatz besonderer Maßnahmen wie z.B. hohe Abkühlungsgeschwindigkeit erreicht werden. Üblicherweise ist die Dehnung bei genügend hoher Festigkeit nicht ausreichend für die Herstellung von tiefziehbarem Material, wie z.B. Platesband oder die Festigkeit ist bei ausreichender Dehnung zu gering.In addition, the softening behavior is such that material states with high strength values and at the same time high elongation values can only be used using special measures such as high cooling rate can be achieved. Usually the elongation is not sufficient for the production of deep-drawable material, e.g. Flat band or the strength is too low with sufficient stretch.

Aufgabe der vorliegenden Erfindung ist es, ein Aluminiumwalz­halbzeug der eingangs genannten Art und ein Verfahren zu seiner Herstellung anzugeben, das ein Korngefüge mit Korngrößen <15 µm sowie feindispers verteilte rundliche intermetallische Phasen aufweist. Erfindungsgemäß wird diese Aufgabe durch die in den Patentansprüchen angegebenen Merkmale gelöst.The object of the present invention is to provide an aluminum rolled semi-finished product of the type mentioned at the outset and a method for its production which has a grain structure with grain sizes of <15 μm and finely dispersed, rounded intermetallic phases. According to the invention, this object is achieved by the features specified in the patent claims.

Es hat sich gezeigt, daß unter Einhaltung der erfindungsgemäß genannten Bedingungen ein besonders feinkörniges Gefüge ent­steht, das sich für viele Anwendungsfälle, insbesondere für die Herstellung von Platesband, Offsetband und Lamellenband aber auch für Verpackungsfolie eignet.It has been shown that a particularly fine-grained structure is produced when the conditions specified according to the invention are met, which structure is suitable for many applications, in particular for the production of flat strip, offset strip and lamella strip, but also for packaging film.

Im folgenden wird die Erfindung anhand von zwei Ausführungs­beispielen näher erläutert:The invention is explained in more detail below on the basis of two exemplary embodiments:

Es wird eine Al-Legierung mit 1 % Fe; 1 % Mn; 0,12 % Si; sonstige Elemente <0,02 % zu einem Stranggußbarren von 100 x 300 x 500 mm vergossen. Danach erfolgt eine zweistufige Homogenisie­rung bei 610 °C für 6 Stunden und 480 °C für 5 Stunden. Der Barren wird warmgewalzt an 4 mm Warmwalzenddicke und dann ohne Zwischenglühung kaltgewalzt an 0,1 mm. Die Endglühung erfolgte bei 350 °C für 2 Stunden. Eine lichtmikroskopische Auswertung des Korngefüges ergab eine Korngröße zwischen 7 und 10 µm.It becomes an Al alloy with 1% Fe; 1% Mn; 0.12% Si; other elements <0.02% cast into a continuous casting bar of 100 x 300 x 500 mm. This is followed by a two-stage homogenization at 610 ° C for 6 hours and 480 ° C for 5 hours. The ingot is hot rolled to 4 mm hot roll thickness and then cold rolled to 0.1 mm without intermediate annealing. The final annealing was carried out at 350 ° C for 2 hours. A light microscopic evaluation of the grain structure showed a grain size between 7 and 10 µm.

Ein weiterer Stranggußbarren der gleichen Abmessung wurde aus der Legierung wie oben mit einem zusätzlichen Gehalt an 0,5 Gew.-% Mg hergestellt. Der Barren wurde bei 550 °C für 7 Stunden homogenisiert. Das Warmwalzen und Kaltwalzen erfolgte wie be­schrieben mit einer anschließenden Endglühung bei 350 °C für 2 Stunden. Die Korngröße des erhaltenen Dünnbandes lag zwischen 8 und 11 µm im Durchmesser.Another continuous cast ingot of the same size was made from the alloy as above with an additional 0.5 wt% Mg content. The ingot was homogenized at 550 ° C for 7 hours. Hot rolling and cold rolling were carried out as described with a subsequent final annealing at 350 ° C. for 2 hours. The grain size of the thin strip obtained was between 8 and 11 μm in diameter.

Claims (3)

1. Aluminiumwalzhalbzeug in Form von Blechen, Bändern oder Folien, bestehend aus einer Aluminiumlegierung vom Typ AlFeMn mit einem gleichmäßigen, feinkörnigen Gefüge, dadurch gekennzeichnet, daß die Legierung wie folgt zusam­mengesetzt ist:
Fe: 0,7 - 1,15 Gew.-%
Mn: 0,5 - 2,0 Gew.-%
Si: <0,6 Gew.-%
sonstige Verunreinigungen maximal 0,03 Gew.-%, Rest Aluminium, wobei die Korndurchmesser des Gefüges 5 bis 15 µm und der Anteil stäbchenförmiger intermetal­lischer Phasen <5 Vol.-% beträgt.1. Aluminum rolled semi-finished product in the form of sheets, strips or foils, consisting of an aluminum alloy of the type AlFeMn with a uniform, fine-grained structure, characterized in that the alloy is composed as follows:
Fe: 0.7 - 1.15% by weight
Mn: 0.5-2.0% by weight
Si: <0.6% by weight
other impurities maximum 0.03% by weight, balance aluminum, the grain diameter of the structure being 5 to 15 µm and the proportion of rod-shaped intermetallic phases being <5% by volume. 2. Aluminiumwalzhalbzeug nach Anspruch 1, dadurch gekenn­zeichnet, daß zusätzlich mindestens eines der folgenden Legierungselemente vorgesehen ist:
Mg: 0,1 - 0,6 Gew.-%
Cu: 0,1 - 0,3 Gew.-%,
Zr 0,01 - 0,20 Gew.-%.2. Aluminum rolled semi-finished product according to claim 1, characterized in that at least one of the following alloy elements is additionally provided:
Mg: 0.1-0.6% by weight
Cu: 0.1-0.3% by weight,
Zr 0.01-0.20% by weight. 3. Verfahren zur Herstellung eines Aluminiumwalzhalbzeuges nach Anspruch 1 oder 2 durch Warmwalzen eines Strangguß­barrens nach einer Homogenisierung bei Temperaturen zwi­schen 300 und 640 °C und anschließendem Kaltwalzen mit nachfolgender Endglühung bei Temperaturen unter 550 °C, dadurch gekennzeichnet, daß der Stranggußbarren bei Tempe­raturen von 620 bis 480 °C für 2 bis 20 Stunden homogeni­siert wird, danach eine Warmwalzung bis an eine Warmband­enddicke von 2,5 bis 5 mm mit nachfolgender Kaltwalzung ohne Zwischenglühung an Enddicke von 40 - 250 µm erfolgt, woraufhin eine Endglühung im Temperaturbereich von 250 bis 400 °C für 1 bis 6 Stunden vorgenommen wird.3. A process for the production of an aluminum rolled semi-finished product according to claim 1 or 2 by hot rolling a continuous casting ingot after homogenization at temperatures between 300 and 640 ° C and then cold rolling with subsequent final annealing at temperatures below 550 ° C, characterized in that the continuous casting ingot at temperatures of 620 homogenized up to 480 ° C for 2 to 20 hours, then hot rolling to a final hot strip thickness of 2.5 to 5 mm followed by cold rolling without intermediate annealing to a final thickness of 40 - 250 µm, followed by final annealing in the temperature range of 250 to 400 ° C is made for 1 to 6 hours.
EP90107320A 1989-04-22 1990-04-18 Rolled aluminium semi-finished product and process for its production Withdrawn EP0394816A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3913324A DE3913324A1 (en) 1989-04-22 1989-04-22 ALUMINUM ROLLING MACHINE AND METHOD FOR THE PRODUCTION THEREOF
DE3913324 1989-04-22

Publications (1)

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EP0394816A1 true EP0394816A1 (en) 1990-10-31

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US (2) US5019188A (en)
EP (1) EP0394816A1 (en)
CA (1) CA2014998A1 (en)
DE (1) DE3913324A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1003401C2 (en) * 1996-06-24 1998-01-07 Hoogovens Aluminium Bv Prodn. of aluminium construction plates with good strength and elasticity
WO1998001593A1 (en) * 1996-07-08 1998-01-15 Alcan International Limited Process for producing aluminum alloy can body stock
EP1688966B1 (en) * 2005-02-03 2014-03-26 Auto-Kabel Management GmbH Electrical flat cable for motor vehicles
US9177695B2 (en) 2006-10-24 2015-11-03 Auto Kabel Managementgesellschaft Mbh Battery lead

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US5554234A (en) * 1993-06-28 1996-09-10 Furukawa Aluminum Co., Ltd. High strength aluminum alloy for forming fin and method of manufacturing the same
US5480498A (en) * 1994-05-20 1996-01-02 Reynolds Metals Company Method of making aluminum sheet product and product therefrom
US6423164B1 (en) 1995-11-17 2002-07-23 Reynolds Metals Company Method of making high strength aluminum sheet product and product therefrom
JPH09207467A (en) 1996-02-02 1997-08-12 Fuji Photo Film Co Ltd Manufacture of lithographic printing plate support
CN103667803B (en) * 2013-11-27 2016-02-10 湖州盛基金属制品有限公司 A kind of alloy foil and complete processing thereof
DE102020119466A1 (en) 2020-07-23 2022-01-27 Nussbaum Matzingen Ag Aluminum alloy and method of making an aluminum alloy
EP4060067A1 (en) * 2021-03-18 2022-09-21 ACR II Aluminium Group Cooperatief U.A. Aluminium alloy sheet for closures and thermomechanical method for producing the same

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DE1817243A1 (en) * 1967-12-29 1969-07-24 Alusuisse Process for the production of fine-grained strips from manganese-containing aluminum alloys
GB1178966A (en) * 1966-06-29 1970-01-28 Alcan Res & Dev Heat-Treatment of Aluminium-Manganese Alloys
FR2229779A1 (en) * 1973-05-17 1974-12-13 Alcan Res & Dev
FR2291285A1 (en) * 1974-11-15 1976-06-11 Alcan Res & Dev MANUFACTURING PROCESS FOR IMPROVED METAL ALLOY PRODUCTS
EP0140827A1 (en) * 1983-08-23 1985-05-08 Schweizerische Aluminium Ag Process for the manufacture of fine grain-textured aluminium rolling mill products

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GB1178966A (en) * 1966-06-29 1970-01-28 Alcan Res & Dev Heat-Treatment of Aluminium-Manganese Alloys
DE1817243A1 (en) * 1967-12-29 1969-07-24 Alusuisse Process for the production of fine-grained strips from manganese-containing aluminum alloys
FR2229779A1 (en) * 1973-05-17 1974-12-13 Alcan Res & Dev
FR2291285A1 (en) * 1974-11-15 1976-06-11 Alcan Res & Dev MANUFACTURING PROCESS FOR IMPROVED METAL ALLOY PRODUCTS
EP0140827A1 (en) * 1983-08-23 1985-05-08 Schweizerische Aluminium Ag Process for the manufacture of fine grain-textured aluminium rolling mill products

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1003401C2 (en) * 1996-06-24 1998-01-07 Hoogovens Aluminium Bv Prodn. of aluminium construction plates with good strength and elasticity
WO1998001593A1 (en) * 1996-07-08 1998-01-15 Alcan International Limited Process for producing aluminum alloy can body stock
GB2330590A (en) * 1996-07-08 1999-04-28 Alcan Int Ltd Process for producing aluminum alloy can body stock
GB2330590B (en) * 1996-07-08 2000-09-27 Alcan Int Ltd Process for producing aluminum alloy can body stock
EP1688966B1 (en) * 2005-02-03 2014-03-26 Auto-Kabel Management GmbH Electrical flat cable for motor vehicles
US9177695B2 (en) 2006-10-24 2015-11-03 Auto Kabel Managementgesellschaft Mbh Battery lead

Also Published As

Publication number Publication date
US5116428A (en) 1992-05-26
DE3913324A1 (en) 1990-10-31
CA2014998A1 (en) 1990-10-22
US5019188A (en) 1991-05-28

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