DE3904041A1 - Method for manufacturing an aluminium foil having a pronounced cubic texture - Google Patents

Method for manufacturing an aluminium foil having a pronounced cubic texture

Info

Publication number
DE3904041A1
DE3904041A1 DE19893904041 DE3904041A DE3904041A1 DE 3904041 A1 DE3904041 A1 DE 3904041A1 DE 19893904041 DE19893904041 DE 19893904041 DE 3904041 A DE3904041 A DE 3904041A DE 3904041 A1 DE3904041 A1 DE 3904041A1
Authority
DE
Germany
Prior art keywords
heat treatment
intermediate heat
pronounced
aluminium foil
manufacturing
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Withdrawn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
DE19893904041
Other languages
German (de)
Inventor
Manfred Dipl Ing Schoen
Edmund Dr Fischer
Rudolf Dr Feilhauer
Paul Dipl Phys Troegele
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.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to DE19893904041 priority Critical patent/DE3904041A1/en
Publication of DE3904041A1 publication Critical patent/DE3904041A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/04—Electrodes or formation of dielectric layers thereon
    • H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
    • 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

Abstract

An aluminium foil having a pronounced cubic texture is produced by hot rolling, cold rolling with intermediate heat treatment, and recrystallisation. The intermediate heat treatment takes place in a low-oxygen protective gas (inert gas), preferably nitrogen.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen einer Alu­ miniumfolie mit ausgeprägter Würfeltextur mittels Warmwalzen, Kaltwalzen mit Zwischenwärmebehandlung und Rekristallisieren.The invention relates to a method for producing an aluminum mini foil with pronounced cube texture using hot rolling, Cold rolling with intermediate heat treatment and recrystallization.

Ein derartiges Verfahren ist aus der DE-B-21 56 701 bekannt.Such a method is known from DE-B-21 56 701.

Dort wird das Metall zwischen dem Warmwalzen und dem abschlie­ ßenden Rekristallisieren zwischen 300 und 650°C erstens einem Kaltwalzen mit einem Walzgrad über 1000%, zweitens einer Wärme­ behandlung bei 180 bis 350°C unterzogen, wobei diese Zwischen- Wärmebehandlung zwischen 5 und 150 Stunden bei der unteren Grenztemperatur und zwischen 5 Sekunden und 3 Minuten bei der oberen Grenztemperatur variiert werden kann. Anschließend an die Zwischen-Wärmebehandlung erfolgt drittens eine Kaltverfor­ mung mit einem Verformungsgrad zwischen 5 und 35%.There the metal is between the hot rolling and the final recrystallizing between 300 and 650 ° C firstly Cold rolling with a rolling degree over 1000%, secondly a heat subjected to treatment at 180 to 350 ° C, this intermediate Heat treatment between 5 and 150 hours at the bottom Limit temperature and between 5 seconds and 3 minutes at the upper limit temperature can be varied. Subsequent to thirdly, the intermediate heat treatment is cold formed with a degree of deformation between 5 and 35%.

Durch die beschriebene definierte Zwischen-Wärmebehandlung unter normaler Atmosphäre in Verbindung mit dem vorhergehen­ den Mindestkaltwalzgrad und dem nachfolgendem definierten Kalt­ walzgrad und anschließender Rekristallisationsglühung wird ein hoher Würfellagenanteil in der Folie erreicht. Bei Folien mit hohem Würfellagenanteil sind die Kristallite derart ausge­ richtet, daß ihre mit den Miller′schen Indizes beschriebene kristallographische Ebene (100) parall zur Folienoberfläche und ihre kristallographische Richtung (010) parallel zur Folien­ walzrichtung liegen.Due to the defined intermediate heat treatment under normal atmosphere described in connection with the previous minimum degree of cold rolling and the subsequent defined degree of cold rolling and subsequent recrystallization annealing, a high proportion of cube layers is achieved in the film. In films with a high proportion of cube layers, the crystallites are oriented in such a way that their crystallographic plane ( 100 ) described with the Miller indices are parallel to the film surface and their crystallographic direction ( 010 ) is parallel to the film rolling direction.

Derartige Folien mit hohem Würfellagenanteil zeigen bei elektro- chemischer Tunnelätzung eine besonders hohe Oberflächenzunahme und sind daher als Ausgangsmaterial für hochkapazitive Anoden in Aluminium-Elektrolytkondensatoren (speziell im Hochvoltbe­ reich) besonders gut geeignet.Such films with a high proportion of cube layers show chemical tunnel etching a particularly high increase in surface area and are therefore the starting material for high-capacity anodes  in aluminum electrolytic capacitors (especially in high-voltage rich) particularly well suited.

Es hat sich nun herausgestellt, daß die nach dem eingangs ge­ nannten Verfahren hergestellten Aluminiumfolien häufig eine zu große Streuung der Oberflächenvergrößerung einerseits über die Breite der Folie und andererseits über die Folienlänge auf­ weisen.It has now been found that the ge after the beginning called processes often produced aluminum foils too large a spread of the surface enlargement on the one hand the width of the film and on the other hand over the length of the film point.

Aufgabe der Erfindung ist es daher, das eingangs genannte Ver­ fahren derart weiterzubilden, daß eine gleichmäßige Oberflächen­ vergrößerung erreicht wird.The object of the invention is therefore the Ver mentioned continue to train such that a uniform surface enlargement is achieved.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Zwischen-Wärmebehandlung in einem sauerstoffarmen Schutzgas durchgeführt wird.This object is achieved in that the Intermediate heat treatment in a low-oxygen protective gas is carried out.

Vorzugsweise wird die Zwischen-Wärmebehandlung in Stickstoff durchgeführt.Preferably the intermediate heat treatment is in nitrogen carried out.

Durch die erfindungsgemäße Ausgestaltung erzielt man eine so­ wohl über die Folienlänge als auch über die Folienbreite gleich­ mäßige Aufrauhung beim elektrochemischen Ätzen der Aluminium­ folie. Dies wird darauf zurückgeführt, daß die Streuungen in der Folienaufrauhung beim eingangs genannten Verfahren durch störende Oxidbildungen bei der Zwischenwärmebehandlung verur­ sacht werden. Diese Störungen werden auch durch den der Zwischen- Wärmebehandlung folgenden Walzstich und eine Waschbehandlung nicht unwirksam.With the configuration according to the invention, one achieves this probably the same over the film length as well as over the film width moderate roughening during electrochemical etching of the aluminum foil. This is attributed to the fact that the scatter in the film roughening in the process mentioned at the outset annoying oxide formation during intermediate heat treatment become gentle. These disturbances are also caused by the Heat treatment following roll pass and a washing treatment not ineffective.

Durch den Gegenstand der Erfindung werden diese den Ätzangriff störende Oxidbildungen (z.B. mit zu großer Dicke oder mit kristalliner Struktur) vermieden.Through the subject matter of the invention, these become the etching attack disruptive oxide formation (e.g. too thick or with crystalline structure) avoided.

Claims (2)

1. Verfahren zum Herstellen einer Aluminiumfolie mit ausgepräg­ ter Würfeltextur mittels Warmwalzen, Kaltwalzen mit Zwischen- Wärmebehandlung und Rekristallisieren, dadurch ge­ kennzeichnet, daß die Zwischen-Wärmebehandlung in einem sauerstoffarmen Schutzgas durchgeführt wird.1. A method for producing an aluminum foil with pronounced cube texture by means of hot rolling, cold rolling with intermediate heat treatment and recrystallization, characterized in that the intermediate heat treatment is carried out in a low-oxygen protective gas. 2. Verfahren nach Anspruch 1, dadurch gekenn­ zeichnet, daß die Zwischen-Wärmebehandlung in Stickstoff durchgeführt wird.2. The method according to claim 1, characterized records that the intermediate heat treatment in Nitrogen is carried out.
DE19893904041 1989-02-10 1989-02-10 Method for manufacturing an aluminium foil having a pronounced cubic texture Withdrawn DE3904041A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893904041 DE3904041A1 (en) 1989-02-10 1989-02-10 Method for manufacturing an aluminium foil having a pronounced cubic texture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893904041 DE3904041A1 (en) 1989-02-10 1989-02-10 Method for manufacturing an aluminium foil having a pronounced cubic texture

Publications (1)

Publication Number Publication Date
DE3904041A1 true DE3904041A1 (en) 1990-08-16

Family

ID=6373841

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893904041 Withdrawn DE3904041A1 (en) 1989-02-10 1989-02-10 Method for manufacturing an aluminium foil having a pronounced cubic texture

Country Status (1)

Country Link
DE (1) DE3904041A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10049579A1 (en) * 2000-10-06 2002-04-18 Audi Ag Production of a decorative surface comprises processing a metallic base material forming a submicroscopic thin oxide layer by etching, and deforming and heat treating to cause a specific recrystallization behavior
CN102766831A (en) * 2012-08-01 2012-11-07 内蒙古包钢钢联股份有限公司 Method for improving cubic texture occupancy rate of aluminum foil
CN113871204A (en) * 2021-08-17 2021-12-31 乳源东阳光优艾希杰精箔有限公司 Optical foil for aluminum electrolytic capacitor and application thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4609408A (en) * 1983-08-25 1986-09-02 Swiss Aluminium Ltd. Process for manufacturing aluminum thin strip and foil having a large fraction of cube texture

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4609408A (en) * 1983-08-25 1986-09-02 Swiss Aluminium Ltd. Process for manufacturing aluminum thin strip and foil having a large fraction of cube texture

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
- ALTENPOHL, Dietrich: Aluminium von innen betrach- tet. 2. Aufl., Aluminium-Verlag GmbH Düsseldorf, 1970, S.91,92 *
- GB-Z: DONS, A.K. *
DE-Buch: HUFNAGEL, W. u.a.: Aluminium-Taschen- buch, 14. Aufl., Aluminium-Verlag Düsseldorf 1983, S.261 *
NES, E.: Nucleation of cube texture in aluminium. In: Materials Science and Technology, Jan. 1986, Vol.2, S.8-18 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10049579A1 (en) * 2000-10-06 2002-04-18 Audi Ag Production of a decorative surface comprises processing a metallic base material forming a submicroscopic thin oxide layer by etching, and deforming and heat treating to cause a specific recrystallization behavior
DE10049579B4 (en) * 2000-10-06 2006-09-14 Audi Ag Method for producing a decorative surface
CN102766831A (en) * 2012-08-01 2012-11-07 内蒙古包钢钢联股份有限公司 Method for improving cubic texture occupancy rate of aluminum foil
CN113871204A (en) * 2021-08-17 2021-12-31 乳源东阳光优艾希杰精箔有限公司 Optical foil for aluminum electrolytic capacitor and application thereof

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