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DE19823472A1 - Process for the production of shiny light metal composite sheets, in particular aviation sheets - Google Patents

Process for the production of shiny light metal composite sheets, in particular aviation sheets

Info

Publication number
DE19823472A1
DE19823472A1 DE1998123472 DE19823472A DE19823472A1 DE 19823472 A1 DE19823472 A1 DE 19823472A1 DE 1998123472 DE1998123472 DE 1998123472 DE 19823472 A DE19823472 A DE 19823472A DE 19823472 A1 DE19823472 A1 DE 19823472A1
Authority
DE
Germany
Prior art keywords
thickness
core
block made
corrosion protection
layer
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.)
Ceased
Application number
DE1998123472
Other languages
German (de)
Inventor
Markus Plakolm
Frank Mueller
Franz Eder
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.)
ALUMINIUM RANSHOFEN WALZWERK G
Original Assignee
ALUMINIUM RANSHOFEN WALZWERK G
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 ALUMINIUM RANSHOFEN WALZWERK G filed Critical ALUMINIUM RANSHOFEN WALZWERK G
Priority to DE1998123472 priority Critical patent/DE19823472A1/en
Priority to PCT/EP1999/003633 priority patent/WO1999061242A1/en
Publication of DE19823472A1 publication Critical patent/DE19823472A1/en
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/016—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of aluminium or aluminium alloys
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/12—Electrodes characterised by the material
    • C23F13/14—Material for sacrificial anodes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)

Abstract

The invention relates to a method for producing bright light-metal composite plates, especially plates for the aviation industry, comprising a core layer of a hardenable aluminium alloy and a cathodic anti-corrosion layer on one or both sides which consists of a more basic metal on an aluminium base. Said method comprises the following steps: placing a block made of the material intended for the anti-corrosion layer(s) onto one or both sides of a block made of the core layer material, where the thickness of each block made of the material for the anti-corrosion layer in relation to the thickness of the block made of the core material is selected in accordance with the desired ratio of anti-corrosion layer thickness to core layer thickness; joining of the blocks made of the material(s) for the anti-corrosion layer(s) and the core layer by cladding rolling in several passes, possibly with intermediate annealing, until the desired final thickness is obtained; solution annealing of the resulting composite plate; quenching of the solution-annealed composite plate; rerolling of the quenched composite plate; and ageing of the rerolled composite plate so as to harden the core material. According to the invention the rerolling comprises a burnishing-rolling stage.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung glänzender Leichtmetall-Verbundbleche, insbesondere Luft­ fahrtbleche, mit eine Kernschicht aus einer aushärtbaren Aluminiumlegierung und einer ein- oder beidseitigen kathodi­ schen Korrosionsschutzschicht aus einem unedleren Material auf Aluminiumbasis Es ist bekannt, Bleche dieser Art mit den Verfahrens­ schritten gemäß Oberbegriff des Patentanspruchs 1 herzustel­ len.The invention relates to a method for manufacturing shiny light metal composite sheets, especially air driving plates, with a core layer made of a curable Aluminum alloy and a cathodi on one or both sides corrosion protection layer made of a less noble material based on aluminum It is known to sheet metal of this type using the process steps according to the preamble of claim 1 len.

Der Kernwerkstoff ist typischerweise eine AlCu(Mg)-Le­ gierung mit der Bezeichnung AA2XXX bzw. eine AlZnMg(Cu)- Legierung mit der Bezeichnung AA7XXX. Als Werkstoff für die Korrosionsschutzschicht wird üblicherweise Reinaluminium für die 2XXX-Legierung oder eine AlZn1-Legierung mit der Be­ zeichnung 7072 für den Kernwerkstoff AA7XXX verwendet.The core material is typically an AlCu (Mg) -Le alloy with the designation AA2XXX or an AlZnMg (Cu) - Alloy called AA7XXX. As a material for the Corrosion protection layer is usually made of pure aluminum the 2XXX alloy or an AlZn1 alloy with the Be drawing 7072 is used for the core material AA7XXX.

Im Rahmen des bekannten Verfahrens erfolgt seit Jahr­ zehnten das Glänzen des Blechs nach dem Auslagern durch mechanisches Polieren. Dieser Vorgang ist sehr arbeitsauf­ wendig. Das Blech wird mittels Stoffbürsten und Diamantpaste poliert. Nachteilig ist, daß die Blechoberfläche eine deut­ liche Polierstruktur und ein graues Erscheinungsbild zeigt. Darüber hinaus verringert sich die Dicke der Korrosions­ schutzschicht durch den mechanischen Abtrag örtlich un­ gleichmäßig, so daß auch der durch die kathodische, d. h. gegenüber dem Kernwerkstoff unedlere, Korrosionsschutz­ schicht bewirkte Korrosionsschutz örtlich ungleichmäßig ist. Darüber hinaus ergibt sich durch Schleif- und Polierfehler ein Ausschuß bis zu 20% der angelieferten Bleche. Der Po­ liermittelabfall ist nachteiligerweise als Sondermüll zu entsorgen, da er mit Schleifmittel und Aluminiumabrieb kon­ taminiert ist.As part of the known method has been taking place for years  tenth through the shine of the sheet after aging mechanical polishing. This process is very busy agile. The sheet is made using fabric brushes and diamond paste polished. It is disadvantageous that the surface of the sheet is clear polishing structure and a gray appearance. In addition, the thickness of the corrosion decreases protective layer due to the mechanical removal locally and evenly, so that the cathodic, d. H. corrosion protection less noble than the core material layer caused corrosion protection is locally uneven. In addition, there are grinding and polishing errors a reject up to 20% of the delivered sheets. The bottom Solvent waste is disadvantageously considered to be hazardous waste dispose of it as it contains abrasives and aluminum debris is damaged.

Aufgabe der Erfindung ist es, das Verfahren gemäß Ober­ begriff des Patentanspruchs 1 so zu gestalten, daß sich bei verringertem Arbeitsaufwand ein verbessertes Glanzergebnis erzielen läßt.The object of the invention is the method according to Ober Concept of claim 1 to be designed so that at reduced workload an improved gloss result can be achieved.

Diese Aufgabe wird erfindungsgemäß mit einem Verfahren mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved with a method solved with the features of claim 1.

Bevorzugt wird ein einziger Nachwalzschritt durchge­ führt, der in einem Arbeitsgang gleichzeitig der Gefügever­ besserung und der Glanzerzeugung dient.A single re-rolling step is preferably carried out leads the structure structure in one work step improvement and the generation of gloss.

Soll das Blech nur einseitig hochglänzend sein, so wird im Glanzwalzschritt als Unterwalze eine Walze mit rauherem Schliff verwendet.If the sheet should only have a high gloss finish on one side, then in the gloss roller step as a bottom roller, a roller with rougher Cut used.

Wenngleich der Walzpoliervorgang auf einer weichen Oberfläche durchgeführt wird, ist das optische Erscheinungs­ bild gegenüber dem bekannten mechanischen Polieren maßgeb­ lich verbessert. Der Glanzwert, gemessen nach Dr. Lange, erhöht sich auf GW 60 bis GW 70 gegenüber GW 50 beim mecha­ nischen Polieren. Der Ausschuß verringert sich praktisch auf null, was zu einer erheblichen Verringerung der Herstel­ lungskosten führt. Darüber hinaus entsteht nach dem erfin­ dungsgemäßen Verfahren beim Polieren nahezu kein Abfall, so daß sich die Umweltbelastung und die Entsorgungskosten ver­ ringern.Although the roll polishing process on a soft Surface is done is the visual appearance image compared to the known mechanical polishing Lich improved. The gloss value, measured according to Dr. Long, increases to GW 60 to GW 70 compared to GW 50 for mecha African polishing. The committee is practically reduced to zero, resulting in a significant reduction in manufac  costs. In addition, according to the inventions process according to the invention during polishing almost no waste, so that the environmental impact and the disposal costs ver wrestle.

Entgegen dem vorbekannten Verfahren erfolgt der Walz­ vorgang vorzugsweise in Bandform. Das Plattierwalzen über mehrere Stiche folgt vorzugsweise mit verringerten Rauhig­ keiten der Walzen und unter Zwischenbeizung. Die Stichabnah­ me liegt zwischen 0,5 und 30%, wobei die Walzgeschwindig­ keit bis zu 400 m/min beträgt.Contrary to the previously known method, the rolling takes place operation preferably in tape form. The plating rolling over multiple stitches preferably follows with reduced roughness of the rollers and with intermediate pickling. The stitch decrease me is between 0.5 and 30%, the rolling speed speed is up to 400 m / min.

Claims (2)

1. Verfahren zur Herstellung glänzender Leichtmetall- Verbundbleche, insbesondere Luftfahrtbleche, mit einer Kern­ schicht aus einer aushärtbaren Aluminiumlegierung und einer ein- oder beidseitigen kathodischen Korrosionsschutzschicht aus einem unedleren Material auf Aluminiumbasis mit folgen­ den Verfahrensschritten:
Belegen eines Blockes aus dem Werkstoff der Kernschicht ein- oder beidseitig mit einem Block aus dem Werkstoff der jeweils vorgesehenen Korrosionsschutzschicht, wobei die Dicke des jeweiligen Blockes aus dem Werkstoff der Korro­ sionsschutzschicht im Verhältnis zur Dicke des Blockes aus dem Kernwerkstoff entsprechend dem gewünschten Verhältnis von Stärke der jeweiligen Korrosionsschutzschicht zur Stärke der Kernschicht gewählt wird,
Vereinigen der Blöcke aus dem Werkstoff bzw. den Werk­ stoffen der Korrosionsschutzschicht bzw. der Korrosions­ schutzschichten und der Kernschicht durch Walzplattieren in mehreren Stichen ggfs. unter Zwischenglühen, auf etwa die gewünschte Fertigdicke,
Lösungsglühen des gewonnenen Verbundblechs,
Abschrecken des lösungsgeglühten Verbundblechs,
Nachwalzen des abgeschreckten Verbundblechs und
Auslagerung des nachgewalzten Verbundblechs zur Aushär­ tung des Kernwerkstoffs, dadurch gekennzeichnet, daß das Nachwalzen einen Glanzwalzschritt aufweist.1. Process for the production of shiny light metal composite sheets, in particular aviation sheets, with a core layer made of a hardenable aluminum alloy and a one- or both-sided cathodic corrosion protection layer made of a base aluminum-based material with the following process steps:
Covering a block made of the material of the core layer on one or both sides with a block made of the material of the corrosion protection layer provided, the thickness of the respective block made of the material of the corrosion protection layer in relation to the thickness of the block made of the core material corresponding to the desired ratio of strength the respective corrosion protection layer is chosen for the thickness of the core layer,
Combining the blocks of the material or materials of the corrosion protection layer or the corrosion protection layers and the core layer by roll cladding in several passes, possibly with intermediate annealing, to about the desired finished thickness,
Solution annealing of the obtained composite sheet,
Quenching the solution annealed composite sheet,
Roughing the quenched composite sheet and
Outsourcing of the re-rolled composite sheet for curing the core material, characterized in that the re-rolling has a gloss rolling step. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Nachwalzen in einem der Gefügeverbesserung und der Glanzerzeugung dienenden Schritt durchgeführt wird.2. The method according to claim 1, characterized in that that the re-rolling in one of the structural improvement and the Gloss generating step is performed.
DE1998123472 1998-05-26 1998-05-26 Process for the production of shiny light metal composite sheets, in particular aviation sheets Ceased DE19823472A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1998123472 DE19823472A1 (en) 1998-05-26 1998-05-26 Process for the production of shiny light metal composite sheets, in particular aviation sheets
PCT/EP1999/003633 WO1999061242A1 (en) 1998-05-26 1999-05-26 Method for producing bright light-metal composite plates, especially plates for the aviation industry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1998123472 DE19823472A1 (en) 1998-05-26 1998-05-26 Process for the production of shiny light metal composite sheets, in particular aviation sheets

Publications (1)

Publication Number Publication Date
DE19823472A1 true DE19823472A1 (en) 1999-12-02

Family

ID=7868953

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1998123472 Ceased DE19823472A1 (en) 1998-05-26 1998-05-26 Process for the production of shiny light metal composite sheets, in particular aviation sheets

Country Status (2)

Country Link
DE (1) DE19823472A1 (en)
WO (1) WO1999061242A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004002840A1 (en) * 2004-01-20 2005-08-11 Erbslöh Aluminium Gmbh Method for producing a decorative, solid sheet metal part
DE102004002899A1 (en) * 2004-01-20 2005-08-11 Erbslöh Aluminium Gmbh Decorative sheet metal component for e.g. motor vehicle part, has cavity in mechanical and chemical treated upper surface, where component is made of hard aluminium material e.g. aluminium magnesium silicon alloy
US6939416B2 (en) 2001-07-23 2005-09-06 Corus Aluminium Walzprodukte Gmbh Weldable high strenght Al-Mg-Si alloy
EP1849542A1 (en) * 2006-04-25 2007-10-31 Hydro Aluminium Deutschland GmbH High-mirror-finished strip by clad rolling

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1400676A1 (en) * 1986-07-22 1988-06-07 Донецкий политехнический институт Method of rolling sheets and strips

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US3881883A (en) * 1971-06-01 1975-05-06 Reynolds Metals Co Clad composites and aluminous metal compositions for cladding
US4410370A (en) * 1979-09-29 1983-10-18 Sumitomo Light Metal Industries, Ltd. Aircraft stringer material and method for producing the same
US5213639A (en) * 1990-08-27 1993-05-25 Aluminum Company Of America Damage tolerant aluminum alloy products useful for aircraft applications such as skin
BR9103666A (en) * 1990-08-27 1992-05-19 Aluminum Co Of America METHOD OF PRODUCTION OF AN ALUMINUM-BASED ALLOY LEAF PRODUCT AND PRODUCT MADE BY SUCH METHOD
CA2056750A1 (en) * 1990-12-03 1992-06-04 Delbert M. Naser Aircraft sheet
US5537851A (en) * 1993-01-05 1996-07-23 Aluminum Company Of America Sheet product produced by massive reduction in last stand of cold rolling process
WO1995007775A1 (en) * 1993-09-17 1995-03-23 Sidmar N.V. Method and device for manufacturing cold rolled metal sheets or strips, and metal sheets or strips obtained
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JPH09137243A (en) * 1995-11-10 1997-05-27 Nkk Corp Aluminum alloy sheet excellent in bendability after press forming and its production
US5723221A (en) * 1996-04-26 1998-03-03 Formica Corporation Aluminous press plate and process for producing same

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SU1400676A1 (en) * 1986-07-22 1988-06-07 Донецкий политехнический институт Method of rolling sheets and strips

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6939416B2 (en) 2001-07-23 2005-09-06 Corus Aluminium Walzprodukte Gmbh Weldable high strenght Al-Mg-Si alloy
DE102004002840A1 (en) * 2004-01-20 2005-08-11 Erbslöh Aluminium Gmbh Method for producing a decorative, solid sheet metal part
DE102004002899A1 (en) * 2004-01-20 2005-08-11 Erbslöh Aluminium Gmbh Decorative sheet metal component for e.g. motor vehicle part, has cavity in mechanical and chemical treated upper surface, where component is made of hard aluminium material e.g. aluminium magnesium silicon alloy
DE102004002840B4 (en) * 2004-01-20 2006-08-10 Erbslöh Aluminium Gmbh Method for producing a decorative, solid sheet metal part
EP1849542A1 (en) * 2006-04-25 2007-10-31 Hydro Aluminium Deutschland GmbH High-mirror-finished strip by clad rolling

Also Published As

Publication number Publication date
WO1999061242A1 (en) 1999-12-02

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