EP0909346B1 - Verfahren und vorrichtung zum elektrolytischen beschichten einer zylinderoberfläche mit metall eines zylinders für das stranggiessen von dünnen metallbändern - Google Patents

Verfahren und vorrichtung zum elektrolytischen beschichten einer zylinderoberfläche mit metall eines zylinders für das stranggiessen von dünnen metallbändern Download PDF

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Publication number
EP0909346B1
EP0909346B1 EP97927245A EP97927245A EP0909346B1 EP 0909346 B1 EP0909346 B1 EP 0909346B1 EP 97927245 A EP97927245 A EP 97927245A EP 97927245 A EP97927245 A EP 97927245A EP 0909346 B1 EP0909346 B1 EP 0909346B1
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EP
European Patent Office
Prior art keywords
casting surface
masks
arrises
plant according
casting
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
EP97927245A
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English (en)
French (fr)
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EP0909346A1 (de
Inventor
Hervé LAVELAINE
Christian Allely
Eric Jolivet
Jean-Claude Catonne
Yann Breviere
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.)
Thyssen Stahl AG
USINOR SA
Original Assignee
Thyssen Stahl AG
USINOR SA
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Priority claimed from FR9607981A external-priority patent/FR2750437A1/fr
Application filed by Thyssen Stahl AG, USINOR SA filed Critical Thyssen Stahl AG
Publication of EP0909346A1 publication Critical patent/EP0909346A1/de
Application granted granted Critical
Publication of EP0909346B1 publication Critical patent/EP0909346B1/de
Anticipated expiration legal-status Critical
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D1/00—Electroforming
    • C25D1/04—Wires; Strips; Foils

Definitions

  • the invention relates to the continuous casting of metals. Specifically, it relates to the conditioning of the external surface of the cylinder or cylinders which constitute the movable wall (s) of the molds for continuous casting of thin strips of metal such as steel.
  • the ingot molds of the continuous casting machines of steel strips of some mm thick between two cylinders directly from liquid metal comprise a casting space defined by the lateral surfaces of two cylinders rotating in direction opposite around their axes kept horizontal and by two side plates in refractory plated against the edges of the cylinders.
  • These cylinders have a diameter up to 1500 mm and a width which, on experimental installations current, is about 600 to 800 mm. But ultimately this width will have to reach 1,300 to 1,500 mm to meet the productivity requirements of an installation industrial.
  • These cylinders are most often formed by a steel core around which is fixed a ferrule of copper or copper alloy, cooled by a circulation of water between the nucleus and the shell or internal to the shell.
  • the surface of the shell which is intended to come into contact with the liquid metal can be coated with a metallic layer, most often nickel, whose thickness generally reaches 1 to 2 mm.
  • This layer of nickel allows to adjust the thermal transfer coefficient of the shell to an optimal value (more weak than if the metal were put directly in contact with copper) so that the solidification of the metal takes place under good metallurgical conditions: a too rapid solidification would cause defects on the surface of the product.
  • This adjustment is made by varying the thickness and structure of the nickel layer.
  • it constitutes a protective layer for copper which prevents it from being too much thermal and mechanical stress.
  • This layer of nickel wears out over the use of the cylinder, and must be restored periodically by partial removal or full of the remaining thickness then deposit of a new layer, but such restoration obviously costs less than a complete replacement of a ferrule in worn bare copper.
  • the nickel deposition is preferably carried out by an electrolytic route, the following way.
  • the new ferrule (or partially or completely previously nickel-plated), which is generally in the form of a hollow copper cylinder or copper alloy such as copper - chromium (1%) - zirconium (0.1%), is mounted on a tree, thanks to which it can easily be transported from a treatment station to the other in the nickel-plating / nickel-plating workshop.
  • the ferrule is brought to the nickel-plating station electrolytic.
  • This station consists of a tank containing the solution of nickel plating, above which you can place the tree in a horizontal position and put it rotating around its axis. We soak the lower part of the shell in the tank, and the rotation of the shaft-ferrule assembly at a speed of approximately 10 rpm, for example, allows the treatment of the entire shell.
  • the ferrule constitutes the cathode
  • the anode can be consisting of one or more anodic titanium baskets immersed in the tank, closed by thin membranes, facing the surface of the shell and containing beads of nickel.
  • anode baskets facing these songs.
  • Other types of anodes soluble or insoluble can also be used.
  • the shell remains fixed and that it is the electrolyte who walks past her.
  • the main thing is therefore to create a relative movement between the ferrule and the electrolyte which ensures the continuous renewal of their interface.
  • the nickel deposit is subjected to intense stresses, so much mechanical than thermal. And we often see after a few flows only the appearance, in the vicinity of the edges of the cylinders, of cracks in the deposit of nickel. These cracks concern areas a few cm wide from the edges of the ferrule. They can cause the formation of defects on the surface of the product poured, since they make its cooling heterogeneous. Above all, they constitute weak points from which very rapid degradation can begin the entire nickel deposit. There may even be propagation of cracks beyond the deposition of nickel, which leads to degradation of the entire shell. They therefore impose an immediate and premature cessation of the use of the cylinder and the complete regeneration of the shell coating.
  • the object of the invention is to improve the performance of resistance to thermo-mechanical stresses on the metallic coating of the shell, delaying as much as possible, or even suppressing the appearance of cracks on the banks, so as to extend the average duration of use of the ferrule between two repairs to its coating.
  • the subject of the invention is a process for electrolytic coating with a metallic layer of the casting surface of a cylinder for the continuous casting of thin metal strips between two cylinders or on a single cylinder, depending on which said casting surface is at least partially immersed in a solution of electrolyte containing a salt of the metal to be deposited, facing at least one anode, place said cathode surface and a relative movement is created between said casting surface and said electrolyte solution, characterized in that there is interposed between said one or more anodes and the edges of said casting surface, and at a distance from said edges, insulating masks avoiding concentration of current lines on said edges and in their vicinity.
  • the invention also relates to a coating installation electrolytic by a metallic layer of the casting surface of a cylinder for the continuous casting of thin metal strips between two cylinders or on a cylinder single, of the type comprising a tank containing an electrolyte containing a metal salt to deposit, means for at least partially immersing in said tank said casting surface and to create a relative movement between said casting surface and said electrolyte, at least one anode disposed in the tank facing said surface of casting, and means for bringing said casting surface to a cathodic potential, characterized in that it comprises masks made of an insulating material interposed between the edges of said casting surface and said anode (s) and at a distance from said edges, said masks avoiding a concentration of the current lines on said edges.
  • said masks have a general shape in an arc whose center of curvature is the same as that of the edge of the casting surface at which they face, and have two parallel edges each placed in the extension of said edge at the same distance "d" from it and connected by a wedge-shaped notch whose sides are perpendicular to each other.
  • the invention consists in carrying out the electrolytic deposition metal coating by having insulating masks near the banks of the ferrules. These masks, a preferred example of which is described, aim to obtain a regular distribution of the current lines in the areas of the edges of the shell. it gives the deposit a uniform thickness in these areas, consistent with the thickness nominal rating.
  • the inventors have found that there is a correlation between the speed of the appearance of cracks in the nickel coating at the edges of the shell and the regularity of the thickness of this deposit in these same areas, in particular on the right edges.
  • the inventors have found that the most reliable way to obtain a deposit of very homogeneous nickel on the edges of the shell and in their immediate vicinity was have insulating masks, preferably of a specific configuration, to distance from said edges, and that under these conditions, it was possible to remove the early appearance of cracks in the coating of the edges of the ferrules.
  • FIG. 1 represents in cross section an installation according to the invention, the cutting plane being located inside the tank 1 containing the electrolyte solution 2 the main component of which is a nickel salt, but in front of the copper ferrule 3 placed as a cathode and two anodes 4, 4 ′ arranged in the bottom of the tank 1.
  • the ferrule 3, of cylindrical outer shape and an outer diameter of 1500 mm, is mounted on a shaft 5 whose axis 6, during the electroplating operation, is rotated by means not shown. At least the lower part of the shell 3 hardens in the electrolyte solution 2.
  • the anodes 4, 4 ' are soluble anodes constituted by anodic baskets in titanium of curved shape, filled with nickel granules.
  • anodes 4, 4 ' extend behind the cutting plane over a width greater than that of the ferrule 3. Facing the banks of the ferrule 3 are arranged masks 7, 7 ′ (only 7 visible in FIG. 1) made of an insulating material such as polymer, whose function is to prevent the current lines coming from the anodes 4, 4 ' to reach directly the edges and edges of the shell 3, in order to avoid excess thickness of the nickel deposit at their level.
  • the positions of these masks 7, 7 'by relative to the ferrule 3 can be adjusted by symbolized positioning means by movable rods 8.
  • This distance “d” is, initially, of about 5 mm when it is desired to deposit a nickel 2 to 3 mm thick.
  • the sides 13, 13 'of each mask 7, 7' which are perpendicular to the ferrule 3 must in this example of implementation of the invention have a length minimum of 50 mm. It is under these conditions that the masks 7, 7 ′ can sufficiently deflect the current lines to best homogenize their distribution on the banks of the ferrule 3.
  • the coating of the edges of the shell 3 will be carried out in a homogeneous manner on one plus or less portion of their surface.
  • anodes vertical 21, 21 ', 21 " such as anode baskets filled with nickel granules, similar to the anode baskets 4, 4 'and facing the edges of the shell 3.
  • the masks can be made differently from those which have just been given as an example, insofar as they make it possible to obtain the desired uniformity for the thickness of the deposit.
  • they instead of being formed by tubes of square, rectangular or other section, they can consist of a plate or an assembly of plates, the surface of which faces towards the ferrule would preferably have the same configuration as that of the tubes of The example.
  • this surface should preferably have two edges parallels each placed in the extension of the edge of the ferrule to the same distance "d" from it and connected by a wedge-shaped notch whose sides are perpendicular to each other.
  • the invention does not exclude that, to further complete and refine the action of masks, we also use current thieves, built into the masks or independent of these, permanently or intermittently.
  • the invention can be applied to the deposition of other metals than nickel on the ferrule.
  • the cylinder thus coated can be used not only on a machine for continuous casting of metal strips (steel or another material) thin between two cylinders, but also on a continuous casting machine thin strips where a single rotating cylinder licks the surface of a bath metallic (cast on a cylinder).
  • it can also apply to the case of coating of the casting surface of a solid cylinder where the shell and the core do not would be one and the same piece. It is also easy to transpose it to a case where the ferrule or massive cylinder could be completely submerged in the bath electrolyte.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Engineering & Computer Science (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Continuous Casting (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Electrolytic Production Of Metals (AREA)

Claims (12)

  1. Verfahren zur elektrolytischen Beschichtung durch eine Metallschicht der Gießoberfläche einer Walze zum Stranggießen von dünnen Metallbändem zwischen zwei Walzen oder auf einer einzigen Walze, wobei die Gießoberfläche mindestens teilweise in eine Elektrolytlösung getaucht wird, die ein Salz des abzuscheidenden Metalls enthält, wobei gegenüber von mindestens einer Anode die Oberfläche als Kathode angeordnet wird und wobei eine relative Bewegung zwischen der Gießoberfläche und der Elektrolytlösung geschaffen wird, dadurch gekennzeichnet, dass zwischen der oder den Anoden und den Kanten der Gießoberfläche und mit Abstand zu den Kanten isolierende Masken angeordnet werden, die eine Konzentration der Stromlinien auf die Kanten und in ihrer Nähe verhindern.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Masken mit fortschreitender Erhöhung der Dicke der Metallschicht allmählich von den Kanten entfernt werden.
  3. Anlage zur elektrolytischen Beschichtung durch eine Metallschicht der Gießoberfläche (3) einer Walze zum Stranggießen von dünnen Metallbändern zwischen zwei Walzen oder auf einer einzigen Walze, umfassend einen Behälter (1), der einen Elektrolyten (2) enthält, der ein Salz des abzuscheidenden Metalls enthält, Mittel (5, 6) zum mindestens teilweisen Eintauchen der Gießoberfläche (3) in den Behälter (1) und zur Schaffung einer relativen Bewegung zwischen der Gießoberfläche (3) und dem Elektrolyten (2), mindestens eine Anode (4, 4'), die im Behälter (1) gegenüber von der Gießoberfläche (3) angeordnet ist, und Mittel, um die Gießoberfläche auf ein kathodisches Potential zu bringen, dadurch gekennzeichnet, dass sie Masken (7, 7') aus einem Isoliermaterial umfasst, die zwischen den Kanten (12) der Gießoberfläche (3) und der oder den Anoden (4, 4') und mit Abstand zu den Kanten angeordnet sind, wobei die Masken (7, 7') eine Konzentration der Stromlinien auf die Kanten (12) verhindern.
  4. Anlage nach Anspruch 3, dadurch gekennzeichnet, dass die Masken (7, 7') die allgemeine Form eines Kreisbogens aufweisen, dessen Krümmungsmittelpunkt der gleiche ist wie derjenige der Kante (12) der Gießoberfläche (3), der sie gegenüberliegen, und zwei parallele Ränder (13, 13') aufweisen, die jeweils in der Verlängerung der Kante (12) in einer gleichen Entfernung "d" von dieser angeordnet sind und durch einen winkelförmigen Ausschnitt (9, 9') verbunden sind, dessen Seiten (10, 10') senkrecht zueinander sind.
  5. Anlage nach Anspruch 4, dadurch gekennzeichnet, dass die Masken (7, 7') durch Wülste gebildet sind.
  6. Anlage nach Anspruch 4, dadurch gekennzeichnet, dass die Masken (7, 7') durch Platten oder Verbindungen von Platten gebildet sind.
  7. Anlage nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass sie Mittel (8) umfasst, um die Masken (7, 7') mit fortschreitendem Wachstum der Metallschicht allmählich von den Kanten (12) zu entfernen.
  8. Anlage nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, dass sie auch Anoden (21, 21') umfasst, die jeweils gegenüber von einer Schmalseite der Gießoberfläche (3) angeordnet sind.
  9. Anlage nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass sie auch Stromdiebe umfasst.
  10. Anlage nach Anspruch 9, dadurch gekennzeichnet, dass die Stromdiebe in die Masken (7, 7') integriert sind.
  11. Anlage nach einem der Ansprüche 3 bis 10, dadurch gekennzeichnet, dass die Mittel zur Erzeugung einer relativen Bewegung zwischen der Gießoberfläche (3) und dem Elektrolyten (2) Mittel sind, um die Gießoberfläche (3) in eine Drehbewegung zu versetzen.
  12. Anlage nach einem der Ansprüche 3 bis 10, dadurch gekennzeichnet, dass die Mittel zur Erzeugung einer relativen Bewegung zwischen der Gießoberfläche (3) und dem Elektrolyten (2) Mittel sind, um den Elektrolyten (2) in Zirkulation um die Gießoberfläche (3) zu versetzen.
EP97927245A 1996-06-27 1997-06-06 Verfahren und vorrichtung zum elektrolytischen beschichten einer zylinderoberfläche mit metall eines zylinders für das stranggiessen von dünnen metallbändern Expired - Lifetime EP0909346B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR9607981A FR2750437A1 (fr) 1996-06-27 1996-06-27 Procede et installation de revetement electrolytique par une couche metallique de la surface d'un cylindre pour coulee continue de bandes metalliques minces
FR9607981 1996-06-27
FR9616255 1996-12-31
FR9616255A FR2750438B1 (fr) 1996-06-27 1996-12-31 Procede et installation de revetement electrolytique par une couche metallique de la surface d'un cylindre pour coulee continue de bandes metalliques minces
PCT/FR1997/001000 WO1997049843A1 (fr) 1996-06-27 1997-06-06 Procede et installation de revetement electrolytique par une couche metallique de la surface d'un cylindre pour coulee continue de bandes metalliques minces

Publications (2)

Publication Number Publication Date
EP0909346A1 EP0909346A1 (de) 1999-04-21
EP0909346B1 true EP0909346B1 (de) 2002-09-18

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EP97927245A Expired - Lifetime EP0909346B1 (de) 1996-06-27 1997-06-06 Verfahren und vorrichtung zum elektrolytischen beschichten einer zylinderoberfläche mit metall eines zylinders für das stranggiessen von dünnen metallbändern

Country Status (22)

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US (1) US6228242B1 (de)
EP (1) EP0909346B1 (de)
JP (1) JP4308909B2 (de)
KR (1) KR100428830B1 (de)
CN (1) CN1117181C (de)
AT (1) ATE224467T1 (de)
AU (1) AU715095B2 (de)
BR (1) BR9709898A (de)
CA (1) CA2252923C (de)
CZ (1) CZ295349B6 (de)
DE (1) DE69715622T2 (de)
DK (1) DK0909346T3 (de)
ES (1) ES2183183T3 (de)
FR (1) FR2750438B1 (de)
PL (1) PL187533B1 (de)
PT (1) PT909346E (de)
RO (1) RO119204B1 (de)
RU (1) RU2188260C2 (de)
SK (1) SK283880B6 (de)
TR (1) TR199802696T2 (de)
UA (1) UA54438C2 (de)
WO (1) WO1997049843A1 (de)

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US6576110B2 (en) * 2000-07-07 2003-06-10 Applied Materials, Inc. Coated anode apparatus and associated method
TWI227285B (en) * 2001-10-15 2005-02-01 Univ Southern California Methods of and apparatus for producing a three-dimensional structure
DE10156925A1 (de) * 2001-11-21 2003-05-28 Km Europa Metal Ag Aushärtbare Kupferlegierung als Werkstoff zur Herstellung von Giessformen
TW590822B (en) * 2001-11-21 2004-06-11 Km Europa Metal Ag Casting-roller for a two-roller-casting equipment and its manufacturing method
JP5008111B2 (ja) * 2002-05-27 2012-08-22 コンカスト アクチェンゲゼルシャフト 連続鋳造鋳型を電解コーティングする方法
US7560015B2 (en) * 2002-05-27 2009-07-14 Concast Ag Process for electrolytic coating of a strand casting mould
US20060037865A1 (en) * 2004-08-19 2006-02-23 Rucker Michael H Methods and apparatus for fabricating gas turbine engines
KR100733366B1 (ko) * 2005-12-23 2007-06-29 주식회사 포스코 주조용 몰드의 전해식 도금 장치
US8784618B2 (en) * 2010-08-19 2014-07-22 International Business Machines Corporation Working electrode design for electrochemical processing of electronic components
KR101495419B1 (ko) * 2013-04-10 2015-02-24 주식회사 포스코 에지 과도금을 방지하기 위한 전기도금장치
CN105154961B (zh) * 2015-10-08 2017-07-04 江苏宏联环保科技有限公司 高度可调节的电镀设备

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BE397490A (de) * 1932-07-13
GB1138561A (en) * 1966-01-28 1969-01-01 Sp Kb Tyazhelykh Tsvetnykh Met A rotatable drum cathode having means for facilitating continuous stripping of metal foil formed by electrodeposition on the cathode
JPH07116636B2 (ja) * 1986-09-26 1995-12-13 川崎製鉄株式会社 ラジアル型めつきセル
JP3348963B2 (ja) * 1994-04-14 2002-11-20 ディップソール株式会社 亜鉛−コバルト合金アルカリ性めっき浴及び該めっき浴を用いためっき方法

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Publication number Publication date
RO119204B1 (ro) 2004-05-28
SK147298A3 (en) 1999-06-11
FR2750438A1 (fr) 1998-01-02
US6228242B1 (en) 2001-05-08
WO1997049843A1 (fr) 1997-12-31
CN1219983A (zh) 1999-06-16
KR20000010694A (ko) 2000-02-25
KR100428830B1 (ko) 2004-09-18
ATE224467T1 (de) 2002-10-15
JP2000512556A (ja) 2000-09-26
PL330923A1 (en) 1999-06-07
DE69715622T2 (de) 2003-08-07
PL187533B1 (pl) 2004-07-30
JP4308909B2 (ja) 2009-08-05
DE69715622D1 (de) 2002-10-24
BR9709898A (pt) 1999-08-10
CA2252923A1 (fr) 1997-12-31
RU2188260C2 (ru) 2002-08-27
CZ295349B6 (cs) 2005-07-13
DK0909346T3 (da) 2003-01-27
SK283880B6 (sk) 2004-04-06
CN1117181C (zh) 2003-08-06
AU715095B2 (en) 2000-01-13
PT909346E (pt) 2003-09-30
CZ400298A3 (cs) 1999-03-17
CA2252923C (fr) 2005-09-20
ES2183183T3 (es) 2003-03-16
EP0909346A1 (de) 1999-04-21
TR199802696T2 (xx) 1999-03-22
AU3180297A (en) 1998-01-14
UA54438C2 (uk) 2003-03-17
FR2750438B1 (fr) 1998-08-07

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