EP0667403B1 - Method of manufacturing tin plated strips or plates of copper or copper alloy - Google Patents

Method of manufacturing tin plated strips or plates of copper or copper alloy Download PDF

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Publication number
EP0667403B1
EP0667403B1 EP95101331A EP95101331A EP0667403B1 EP 0667403 B1 EP0667403 B1 EP 0667403B1 EP 95101331 A EP95101331 A EP 95101331A EP 95101331 A EP95101331 A EP 95101331A EP 0667403 B1 EP0667403 B1 EP 0667403B1
Authority
EP
European Patent Office
Prior art keywords
copper
tin
manufacture
strip
strips
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.)
Expired - Lifetime
Application number
EP95101331A
Other languages
German (de)
French (fr)
Other versions
EP0667403A1 (en
Inventor
Hans Hermann Biederer
Stefan Hoveling
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.)
KM Europa Metal AG
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KM Europa Metal AG
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Filing date
Publication date
Application filed by KM Europa Metal AG filed Critical KM Europa Metal AG
Publication of EP0667403A1 publication Critical patent/EP0667403A1/en
Application granted granted Critical
Publication of EP0667403B1 publication Critical patent/EP0667403B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/227—Surface roughening or texturing
    • 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/08—Tin or alloys based thereon
    • 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
    • B21B2003/005—Copper or its alloys

Definitions

  • the invention relates to a process for the production of tinned strips or sheets made of copper or a copper alloy. Furthermore, the invention relates to the use of tinned strip-shaped semi-finished products in the construction sector, in particular for roofing or facade cladding.
  • the invention has for its object to provide a method with which the visual appearance of the surfaces of ribbon-shaped semi-finished products made of copper or a copper alloy can be improved. Furthermore, the relatively high sensitivity of the surfaces to mechanical and chemical impairments should be reduced.
  • strip-shaped semi-finished copper product is first rolled by means of a textured work roll to set an average roughness depth in the range from 3 to 12 ⁇ m and then continuously coated with tin or a tin-based alloy, and the ratio of the average roughness depth to the thickness of the Tin layer is greater than 1.2, preferably greater than 2.
  • the surface of a cold-rolled and possibly degreased strip made of SF-Cu with a thickness of 0.72 mm and a width of 670 mm was roughened on one side in a duo stand with a textured work roll.
  • the essentially regularly textured surface of the copper strip had an average roughness depth of about 5 ⁇ m after the rolling treatment.
  • the copper tape was then coated with a galvanically applied pure tin layer of 1.2 ⁇ m thick.
  • the texture of the relatively thin layer of pure tin applied to the textured strip surface is very evenly matt-glossy, insensitive to handling and also proves to be sufficiently opaque.
  • the non-textured back of the tape, which is also coated, on the other hand has a high light reflectivity. During handling, there are conspicuous fingerprints and the resulting uneven discolouration of the surface. However, these disadvantages do not disturb on the back of the tape.
  • a metallographic examination of the microstructure of the tin layer showed an even distribution of the tin particles on the textured carrier material.
  • the measurement results are summarized in the following table.
  • the average roughness (average roughness R a ) was measured both in the rolling direction (L) and transverse to the rolling direction (Q).
  • Sample Test direction Surface roughness ( ⁇ m)

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Coating With Molten Metal (AREA)
  • Metal Rolling (AREA)
  • Laminated Bodies (AREA)
  • Laser Beam Processing (AREA)
  • Welding Or Cutting Using Electron Beams (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Conductive Materials (AREA)
  • Chemically Coating (AREA)

Abstract

Prodn. of tinned copper (alloy) strip or sheet involves rolling the copper semi-finished strip product with a textured work roll to achieve an average roughness depth of 3-12 mu m and continuously coating the strip with tin (alloy), such that the ratio of the average roughness depth to tin layer thickness is greater than 1.2, pref. greater than 2.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von verzinnten Bändern oder Blechen aus Kupfer oder einer Kupferlegierung. Ferner betrifft die Erfindung die Verwendung von verzinntem bandförmigem Halbzeug im Baubereich, insbesondere für die Dachabdeckung oder Fassadenbekleidung.The invention relates to a process for the production of tinned strips or sheets made of copper or a copper alloy. Furthermore, the invention relates to the use of tinned strip-shaped semi-finished products in the construction sector, in particular for roofing or facade cladding.

Unter normalen atmosphärischen Bedingungen bildet sich auf der Oberfläche von metallblankem Kupfer eine festhaftende und beständige Deckschicht, die sich infolge der Reaktion des Kupfers mit Feuchtigkeit und/oder Luftsauerstoff teilweise erst mit großer Zeitverzögerung zu einer gleichmäßigen Braunfärbung weiter entwickelt.Under normal atmospheric conditions, the surface of bare metal forms a firmly adhering and stable top layer, which, due to the reaction of the copper with moisture and / or atmospheric oxygen, sometimes develops into a uniform brown color after a long time delay.

Für die unterschiedlichen Anwendungsfälle, insbesondere im Baubereich, besteht jedoch vielfach der Wunsch nach dekorativen mattsilberfarbigen Oberflächen, die von einer Bewitterung oder einer Behandlung mit chemischen Lösungen unabhängig sind. Ferner soll sich das Aussehen der Oberfläche weder durch Handhabung bei der Montage noch durch Bewitterung wesentlich verändern.For the various applications, particularly in the construction sector, there is often a desire for decorative matt silver-colored surfaces that are independent of weathering or treatment with chemical solutions. Furthermore, the appearance of the surface should not change significantly due to handling during assembly or weathering.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren anzugeben, mit dem das optische Erscheinungsbild der Oberflächen von bandförmigem Halbzeug aus Kupfer oder einer Kupferlegierung verbessert werden kann. Ferner soll die relativ große Empfindlichkeit der Oberflächen gegen mechanische und chemische Beeinträchtigungen verringert werden.The invention has for its object to provide a method with which the visual appearance of the surfaces of ribbon-shaped semi-finished products made of copper or a copper alloy can be improved. Furthermore, the relatively high sensitivity of the surfaces to mechanical and chemical impairments should be reduced.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das bandförmige Kupferhalbzeug zunächst mittels einer texturierten Arbeitswalze zur Einstellung einer im Bereich von 3 bis 12 µm liegenden mittleren Rauhtiefe gewalzt und dann kontinuierlich mit Zinn oder einer Zinnbasislegierung beschichtet wird und wobei das Verhältnis von mittlerer Rauhtiefe zu Dicke der Zinnschicht größer als 1,2, vorzugsweise größer als 2 ist.This object is achieved in that the strip-shaped semi-finished copper product is first rolled by means of a textured work roll to set an average roughness depth in the range from 3 to 12 μm and then continuously coated with tin or a tin-based alloy, and the ratio of the average roughness depth to the thickness of the Tin layer is greater than 1.2, preferably greater than 2.

Vorteilhafte Weiterbildungen des erfindungsgemäßen Verfahrens sind durch die Merkmale der Unteransprüche 2 bis 5 gekennzeichnet. Ein bevorzugtes Anwendungsgebiet für das oberflächenveredelte bandförmige Halbzeug ist in Anspruch 6 angegeben.Advantageous developments of the method according to the invention are characterized by the features of subclaims 2 to 5. A preferred field of application for the surface-finished strip-shaped semi-finished product is specified in claim 6.

Mit Hilfe der Maßnahmen des erfindungsgemäßen Verfahrens gelingt es in überraschend einfacher Weise ein oberflächenveredeltes bandförmiges Halbzeug aus Kupfermaterial zu erzeugen, das zumindest auf der strukturierten Bandoberfläche ein mattes silberfarbiges Aussehen aufweist.With the help of the measures of the method according to the invention, it is possible to produce, in a surprisingly simple manner, a semi-finished strip-shaped semi-finished product made of copper material which has a matt silver-colored appearance at least on the structured strip surface.

Anhand einiger Ausführungsbeispiele wird die Erfindung im folgenden noch näher erläutert.The invention is explained in more detail below with the aid of a few exemplary embodiments.

Die Oberfläche eines kaltgewalzten und gegebenenfalls entfetteten Bands aus SF-Cu mit einer Dicke von 0,72 mm und einer Breite von 670 mm wurde in einem Duogerüst einseitig mit einer texturierten Arbeitswalze aufgerauht. Die im wesentlichen regelmäßig texturierte Oberfläche des Kupferbands wies nach der Walzbehandlung eine mittlere Rauhtiefe von etwa 5 µm auf. Das Kupferband wurde dann mit einer galvanisch aufgebrachten Reinzinnschicht von 1,2 µm Dicke beschichtet.The surface of a cold-rolled and possibly degreased strip made of SF-Cu with a thickness of 0.72 mm and a width of 670 mm was roughened on one side in a duo stand with a textured work roll. The essentially regularly textured surface of the copper strip had an average roughness depth of about 5 μm after the rolling treatment. The copper tape was then coated with a galvanically applied pure tin layer of 1.2 µm thick.

Die Beschaffenheit der auf die texturierte Bandoberfläche aufgebrachten relativ dünnen Reinzinnschicht ist sehr gleichmäßig mattglänzend, unempfindlich in der Handhabung und erweist sich auch optisch als ausreichend deckend. Die ebenfalls beschichtete nichttexturierte Bandrückseite weist dagegen ein hohes Lichtreflexionsvermögen auf. Bei der Handhabung verbleiben auffällige Fingerspuren und daraus resultierende ungleichmäßige Verfärbungen der Oberfläche. Auf der Bandrückseite stören diese Nachteile jedoch nicht.The texture of the relatively thin layer of pure tin applied to the textured strip surface is very evenly matt-glossy, insensitive to handling and also proves to be sufficiently opaque. The non-textured back of the tape, which is also coated, on the other hand has a high light reflectivity. During handling, there are conspicuous fingerprints and the resulting uneven discolouration of the surface. However, these disadvantages do not disturb on the back of the tape.

Eine metallographische Untersuchung der Mikrostruktur der Zinnschicht zeigte eine gleichmäßige Verteilung der Zinnteilchen auf dem texturierten Trägerwerkstoff.A metallographic examination of the microstructure of the tin layer showed an even distribution of the tin particles on the textured carrier material.

In Abwandlung des Ausführungsbeispiels wurden vier weitere Walzmaterialproben mit auf unterschiedlichem Wege texturierten Arbeitswalzen einseitig aufgerauht. Es standen sowohl Arbeitswalzen zur Verfügung, deren Oberfläche durch Laser- oder Elektonenstrahlbehandlung texturiert waren als auch solche, deren Rauhigkeitsstruktur durch das Funkenerodierverfahren erzeugt wurde. Die Beschichtung mit Reinzinn erfolgte jeweils auf galvanischem Wege.In a modification of the exemplary embodiment, four further rolled material samples were roughened on one side with work rolls textured in different ways. Both work rolls were available, the surface of which was textured by laser or electron beam treatment, as well as those whose roughness structure was generated by the spark erosion process. The coating with pure tin was done galvanically.

Die Meßergebnisse sind in folgender Tabelle zusammengefaßt. Die mittlere Rauhtiefe (Mittenrauhwert Ra) wurde sowohl in Walzrichtung (L) als auch quer zur Walzrichtung (Q) gemessen. Probe Prüfrichtung Rauhtiefe (µm) Schichtdicke (µm) L 3,2 1 2,0 Q 4,2 L 5,0 2 2,5 Q 5,4 L 11,5 3 4,0 Q 11,7 L 7,0 1 2,0 Q 7,5 The measurement results are summarized in the following table. The average roughness (average roughness R a ) was measured both in the rolling direction (L) and transverse to the rolling direction (Q). sample Test direction Surface roughness (µm) Layer thickness (µm) L 3.2 1 2.0 Q 4.2 L 5.0 2nd 2.5 Q 5.4 L 11.5 3rd 4.0 Q 11.7 L 7.0 1 2.0 Q 7.5

Claims (6)

  1. Process for the manufacture of tinned strips or sheets of copper or a copper alloy, characterised by the combination of the following process steps:
    - The copper semi-product in strip form is rolled by means of a textured working roller to produce a mean peak-to-valley height lying in the range from 3 to 12 µm.
    - Continuous coating of the copper semi-product in strip form with tin or a tin-based alloy so that the ratio of the mean peak-to-valley height to the thickness of the coating of tin is greater than 1.2, preferably greater than 2.
  2. Process for the manufacture of tinned strips or sheets according to claim 1, characterised in that the mechanical surface treatment of at least one side of the strip is carried out by means of a roller textured by laser or electron beam treatment.
  3. Process for the manufacture of tinned strips or sheets according to claim 1, characterised in that the coating with tin or a tin-based alloy is effected galvanically.
  4. Process for the manufacture of tinned strips or sheets according to claim 1, characterised in that in or a tin-based alloy is applied by fusion.
  5. Process for the manufacture of tinned strips or sheets according to claim 3 or 4, characterised in that the thickness of the coating of tin is approximately 1 to 8 µm.
  6. Use of a semi-product in strip form manufactured according to the process as in one of claims 1 to 5 as a material for roof covering or façade cladding.
EP95101331A 1994-02-15 1995-02-01 Method of manufacturing tin plated strips or plates of copper or copper alloy Expired - Lifetime EP0667403B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4404699A DE4404699A1 (en) 1994-02-15 1994-02-15 Process for the production of tinned strips or sheets made of copper or a copper alloy
DE4404699 1994-02-15

Publications (2)

Publication Number Publication Date
EP0667403A1 EP0667403A1 (en) 1995-08-16
EP0667403B1 true EP0667403B1 (en) 1997-05-21

Family

ID=6510236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95101331A Expired - Lifetime EP0667403B1 (en) 1994-02-15 1995-02-01 Method of manufacturing tin plated strips or plates of copper or copper alloy

Country Status (12)

Country Link
US (1) US5580617A (en)
EP (1) EP0667403B1 (en)
JP (1) JP3365695B2 (en)
AT (1) ATE153391T1 (en)
AU (1) AU687140B2 (en)
CA (1) CA2141122C (en)
DE (2) DE4404699A1 (en)
DK (1) DK0667403T3 (en)
ES (1) ES2101589T3 (en)
FI (1) FI111651B (en)
GR (1) GR3023527T3 (en)
NO (1) NO309156B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1952218B (en) * 2005-10-19 2010-09-29 比亚迪股份有限公司 Process for obtaining coating with different surface roughness

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19710292C2 (en) * 1997-03-13 2001-05-03 Wieland Werke Ag Process for the production of a tinned strip
DE102007032874A1 (en) * 2007-07-12 2009-01-15 Wuppermann Ag Hot-rolled metal strip coated in an immersion bath used as a component and/or layer of a composite material has surfaces with different average surface roughness
CN116018218A (en) * 2020-09-18 2023-04-25 贺利氏德国有限两合公司 Production of surface-modified copper strips for laser bonding

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5767186A (en) * 1980-10-08 1982-04-23 Nippon Steel Corp Steel plate for fuel container
US4413768A (en) * 1981-03-18 1983-11-08 Kabel-und Metallwerke, Guthehoffnungshutte AG Method of making a multi-bore element
US4515671A (en) * 1983-01-24 1985-05-07 Olin Corporation Electrochemical treatment of copper for improving its bond strength
US4750976A (en) * 1984-12-19 1988-06-14 Blasberg Oberflachentechnik Gmbh Electrically conductive copper layers and process for preparing same
DE4034249A1 (en) * 1990-10-27 1992-04-30 Kabelmetal Ag METHOD FOR PRODUCING BROWN COVER LAYERS ON COPPER
DE4041854A1 (en) * 1990-12-24 1992-06-25 Kabelmetal Ag METHOD FOR PRODUCING A GREEN PATINA ON A SEMI-PRODUCT CONSTRUCTED FROM COPPER
JPH04314875A (en) * 1991-01-22 1992-11-06 Kobe Steel Ltd Production of tinned copper alloy material containing zinc
US5354624A (en) * 1992-07-15 1994-10-11 The Louis Berkman Company Coated copper roofing material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1952218B (en) * 2005-10-19 2010-09-29 比亚迪股份有限公司 Process for obtaining coating with different surface roughness

Also Published As

Publication number Publication date
DE4404699A1 (en) 1995-08-17
ATE153391T1 (en) 1997-06-15
DK0667403T3 (en) 1997-12-08
FI950668A (en) 1995-08-16
AU1226195A (en) 1995-08-24
DE59500243D1 (en) 1997-06-26
NO950552D0 (en) 1995-02-14
ES2101589T3 (en) 1997-07-01
FI111651B (en) 2003-08-29
JP3365695B2 (en) 2003-01-14
US5580617A (en) 1996-12-03
CA2141122C (en) 1998-12-29
NO309156B1 (en) 2000-12-18
NO950552L (en) 1995-08-16
GR3023527T3 (en) 1997-08-29
JPH07331484A (en) 1995-12-19
EP0667403A1 (en) 1995-08-16
FI950668A0 (en) 1995-02-15
CA2141122A1 (en) 1995-08-16
AU687140B2 (en) 1998-02-19

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