EP1507612B1 - Method for the galvanic coating of a continuous casting mould - Google Patents
Method for the galvanic coating of a continuous casting mould Download PDFInfo
- Publication number
- EP1507612B1 EP1507612B1 EP03735416.4A EP03735416A EP1507612B1 EP 1507612 B1 EP1507612 B1 EP 1507612B1 EP 03735416 A EP03735416 A EP 03735416A EP 1507612 B1 EP1507612 B1 EP 1507612B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- process according
- coating
- anode
- casting mould
- electrolyte
- 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
Links
- 238000000576 coating method Methods 0.000 title claims description 41
- 239000011248 coating agent Substances 0.000 title claims description 40
- 238000000034 method Methods 0.000 title claims description 32
- 238000009749 continuous casting Methods 0.000 title claims description 25
- 239000000463 material Substances 0.000 claims description 26
- 239000003792 electrolyte Substances 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 11
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- 239000011651 chromium Substances 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 2
- 239000005751 Copper oxide Substances 0.000 claims description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- 239000000460 chlorine Substances 0.000 claims description 2
- 229910000431 copper oxide Inorganic materials 0.000 claims description 2
- 230000005672 electromagnetic field Effects 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 229940098779 methanesulfonic acid Drugs 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- -1 for example Substances 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 claims 1
- 230000008021 deposition Effects 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000009713 electroplating Methods 0.000 description 3
- 238000012805 post-processing Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000022159 cartilage development Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/08—Electroplating with moving electrolyte e.g. jet electroplating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/059—Mould materials or platings
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/10—Agitating of electrolytes; Moving of racks
-
- 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
- C25D5/04—Electroplating with moving electrodes
-
- 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
- C25D5/18—Electroplating using modulated, pulsed or reversing current
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/04—Tubes; Rings; Hollow bodies
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/10—Electrodes, e.g. composition, counter electrode
Definitions
- the invention relates to a process for the galvanic coating of a continuous casting mold according to the preamble of claim 1.
- Continuous casting molds are subject to continuous abrasive wear during casting operation, so that the mold cavity and thus also the cross-sectional dimensions of the cast strands become larger and larger. After a certain number of working cycles, therefore, the respective continuous casting mold must be replaced by a new or reworked.
- the post-processing of the molds for the purpose of restoring the original geometry of the mold cavity or of the desired mold cavity.
- the post-processing can be done, for example, by an explosion deformation of the mold on a mandrel.
- This method is not only relatively complicated, expensive and polluting, but also means a deformation of Kokillenaussenform, which in turn brings an enlargement of existing at Kokillen express water gap and thus a negative impact on the Kokillenkühlung with it.
- the latter disadvantage also has other known pressing method for recovering the molds, in which first the mold is compressed from the outside and then the mold cavity is brought to the original internal dimensions by internal grinding or internal milling.
- a further disadvantage of the immersion electroplating coating is that the outer surfaces of the mold have to be covered with a material that is inert to the electrolytic treatment.
- the present invention has for its object to provide a method of the type mentioned, with which the desired mold cavity can be achieved as easy as possible or even re-achieved in Stranggiesskokillen with polygonal polygonal mold cavity without problem areas in the corner regions of the mold cavity arise. Furthermore, it should be ensured that the continuous casting molds to be coated remain as unchanged as possible in their external dimensions.
- both a thin layer of the wear-resistant material can be dimensionally accurate, without any need for reworking is, as well as a thick film (in which at best minimal rework occurs) are applied, since the layer structure evenly, without corner weaknesses occurs.
- a significant advantage of the inventive method is that in the galvanic coating, only the inner surfaces of the mold cavity come into contact with the electrolyte and therefore the outer surfaces of the continuous casting mold need not be covered.
- an intermittent pole reversal anode / cathode is possible with which a pulsating deposition of the coating material can be achieved and the coating can be influenced.
- the coating can be achieved faster than with the conventional methods. A cartilage formation on the coated surfaces can be largely prevented.
- a device 1 is shown, which is provided for the galvanic coating of a mold cavity 3 of a continuous casting 2 limiting inner surfaces 4 with a wear-resistant coating material in order to achieve or re-reaching a desired mold cavity.
- the mold cavity 3 may for example have a rectangular or square cross-section and thus be limited by four inner surfaces 4. But it could also be a mold with a different mold cavity cross section (eg, round, polygonal, langckförmig) or a so-called dogbone mold.
- the Stranggiesskokille 2 are the front side of a head and a bottom piece 5, 6 associated with each other, the projecting through a cavity 3 anode 7 with each other are connected. Sealing elements 8, 9 at the end faces of the continuous casting mold 2 seal the mold cavity 3 from. Also, the anode 7 is in the top and bottom piece 5, 6 sealingly inserted, see. Seals 13, 14. Both the bottom piece 6 and the head piece 5 are provided with at least one each, preferably with a number of openings 11 and 12 (in Fig. 1 each one opening 11, 12 indicated), the inlet or outlet openings for insertion or outlet of an electrode provided for the galvanic coating 25 into or form the otherwise sealed, forming a reactor space mold cavity 3.
- This is pumped hydrodynamically controllable from a storage tank 15 by means of a pump 16 from below through the bottom piece 6 into the reactor chamber and passed with overflow (without pressure) on the head piece 5 back to the feed tank 15 and the pump 16.
- the electrolyte 25, the coating material is metered as oxide from a container 18.
- the continuous casting mold 2 as the cathode and the anode 7 with indicated wings 7 ' can be connected to a direct current source 20 and thereby form a direct current circuit.
- Either the sealing elements 8, 9 or the seals 13, 14 act simultaneously electrically insulating.
- the anode is adapted in its cross-sectional shape of the cross-sectional shape of the mold cavity 3.
- prismatic anodes are used.
- the anode consists in particular of a platinum or mixed ceramic-coated titanium material or of lead. It can also be designed as a multiple anode. In principle, however, the coating material, such as copper, nickel or chromium may be contained in the anode, where it would be provided in solid or piece form.
- the inventive method is suitable for applying, for example, copper, nickel or chromium layers.
- the coating material is supplied by the electrolyte 25 alone.
- the anode itself is insoluble.
- platinum coated titanium anodes, Pb sheet metal anodes, coated mixed ceramic, and other materials may be used.
- methanesulfonic acid, cyanide or sulfuric acid electrolyte types it is possible to use methanesulfonic acid, cyanide or sulfuric acid electrolyte types. With these high-speed electrolytes, a current density of 20 to 40 A / dm 2 can be achieved during intensive electrolytic movement.
- both a thin layer of the wear-resistant material can be mass-accurately applied without the need for reworking, as well as a thick layer (which requires minimal reworking if necessary), since the layer build-up is uniform and without corner weaknesses.
- the process according to the invention brings significant advantages, in particular in the case of chromium plating, since particularly corner problems arise particularly with chromium in the conventional galvanic coating (layer 5 to 10 times smaller than on the surfaces), and the chromium can only be refinished with grinding.
- a significant advantage of the inventive method is that in the galvanic coating, only the inner surfaces of the mold cavity come into contact with the electrolyte 25 and therefore the outer surfaces of the continuous casting mold do not need to be covered.
- the anode and / or the continuous casting mold could in principle be designed to be rotatable about its longitudinal axis, so that a rotation during the coating and thus an improved coating could be made possible.
- the continuous casting mold 2 is cleaned before coating by a rinsing process, in particular a cascade rinse, which is not explained in detail. It is involved here for the coating and preferably for this rinse in a closed system.
- the continuous casting mold consists of a metallic material or material composite, such as copper, aluminum, nickel, of a plastic or composite plastic or of a ceramic material or other materials.
- a rectifier device can be provided, by means of which the current direction can be reversed in order to achieve a uniform layer application.
- the continuous casting mold 2 may alternatively be reinforced only in certain areas or areas, i. coated with a greater layer thickness, in which a relatively higher wear occurs during operation, for example in the region of the bath surface, in which an additional wear occurs in particular by the covering material. This achieves an efficient coating.
- Such partial coating can be achieved by partially covering the anode or by inserting non-conductive diaphragms or by similar means.
- electromagnetic fields can be generated by magnets not shown in detail by which the particles of the coating material are conducted or guided such that in certain areas, preferably in the edge regions of the continuous casting mold, an equally thick layer deposits as in the other areas.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Electroplating Methods And Accessories (AREA)
- Continuous Casting (AREA)
- Electrolytic Production Of Metals (AREA)
- Mold Materials And Core Materials (AREA)
Description
Die Erfindung betrifft ein Verfahren zur galvanischen Beschichtung einer Stranggiesskokille gemäss dem Oberbegriff des Anspruches 1.The invention relates to a process for the galvanic coating of a continuous casting mold according to the preamble of
Stranggiesskokillen unterliegen beim Giessbetrieb einem ständigen abrasiven Verschleiss, so dass der Formhohlraum und somit auch die Querschnittabmasse der gegossenen Stränge immer grösser wird. Nach einer bestimmten Anzahl von Arbeitszyklen muss daher die jeweilige Stranggiesskokille durch eine neue ersetzt oder nachbearbeitet werden.Continuous casting molds are subject to continuous abrasive wear during casting operation, so that the mold cavity and thus also the cross-sectional dimensions of the cast strands become larger and larger. After a certain number of working cycles, therefore, the respective continuous casting mold must be replaced by a new or reworked.
Es sind verschiedene Methoden für die Nachbearbeitung der Kokillen zwecks Wiederherstellung der ursprünglichen Geometrie des Formhohlraumes bzw. des Formhohlraum-Sollmasses bekannt. Die Nachbearbeitung kann zum Beispiel durch eine Explosionsverformung der Kokille auf einen Dorn erfolgen. Diese Methode ist nicht nur relativ kompliziert, teuer und umweltbelastend, sondern bedeutet auch eine Deformation der Kokillenaussenform, was wiederum eine Vergrösserung eines am Kokillenumfang vorhandenen Wasserspaltes und dadurch einen negativen Einfluss auf die Kokillenkühlung mit sich bringt. Den letztgenannten Nachteil haben auch andere bekannte Pressverfahren zum Zurückformen der Kokillen, bei welchen zuerst die Kokille von aussen zusammengedrückt und anschliessend der Formhohlraum auf das ursprüngliche Innenmass durch Innenschleifen oder Innenfräsen gebracht wird.There are various methods for the post-processing of the molds for the purpose of restoring the original geometry of the mold cavity or of the desired mold cavity. The post-processing can be done, for example, by an explosion deformation of the mold on a mandrel. This method is not only relatively complicated, expensive and polluting, but also means a deformation of Kokillenaussenform, which in turn brings an enlargement of existing at Kokillenumfang water gap and thus a negative impact on the Kokillenkühlung with it. The latter disadvantage also has other known pressing method for recovering the molds, in which first the mold is compressed from the outside and then the mold cavity is brought to the original internal dimensions by internal grinding or internal milling.
Schliesslich ist aus der
Bei Anfertigung von Dickschichten besteht zudem die Gefahr, dass sich Eckbrücken mit eingeschlossenen Hohlräumen bilden, wodurch die Kokille unbrauchbar wird. Ein weiterer Nachteil der Tauchgalvanik-Beschichtung besteht darin, dass die Aussenflächen der Kokille mit einem gegenüber der elektrolytischen Behandlung inerten Material abgedeckt werden müssen.When making thick layers there is also the danger that corner bridges form with enclosed cavities, whereby the mold is unusable. A further disadvantage of the immersion electroplating coating is that the outer surfaces of the mold have to be covered with a material that is inert to the electrolytic treatment.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art vorzuschlagen, mit welchem das Formhohlraum-Sollmass auch bei Stranggiesskokillen mit im Querschnitt polygonalen Formhohlraum möglichst einfach erreicht oder wiedererreicht werden kann, ohne dass Problemzonen in den Eckbereichen des Formhohlraumes entstehen. Ferner soll erreicht werden, dass die zu beschichtenden Stranggiesskokillen in ihren Aussenabmessungen möglichst unverändert bleiben.The present invention has for its object to provide a method of the type mentioned, with which the desired mold cavity can be achieved as easy as possible or even re-achieved in Stranggiesskokillen with polygonal polygonal mold cavity without problem areas in the corner regions of the mold cavity arise. Furthermore, it should be ensured that the continuous casting molds to be coated remain as unchanged as possible in their external dimensions.
Diese Aufgabe wird erfindungsgemäss durch ein Verfahren mit den Merkmalen des Anspruches 1 gelöst.This object is achieved according to the invention by a method having the features of
Bevorzugte Weitergestaltungen der Erfindung bilden den Gegenstand der abhängigen Ansprüche.Preferred embodiments of the invention form the subject of the dependent claims.
Mit dem erfindungsgemässen Verfahren, bei welchem der Formhohlraum der kathodebildenden Stranggiesskokille unter Verwendung einer unlöslichen Anode vom Elektrolyt hydrodynamisch kontrollierbar durchströmt wird, wobei der Elektrolyt allein das Beschichtungsmaterial liefert, kann sowohl eine Dünnschicht des verschleissfesten Materials massgenau, ohne dass eine Nachbearbeitung notwendig ist, als auch eine Dickschicht (bei der allenfalls minimale Nacharbeit anfällt) aufgetragen werden, da der Schichtaufbau gleichmässig, ohne Eckschwächen, erfolgt. Ein wesentlicher Vorteil des erfindungsgemässen Verfahrens besteht darin, dass bei der galvanischen Beschichtung lediglich die Innenflächen des Formhohlraumes mit dem Elektrolyt in Kontakt kommen und daher die Aussenflächen der Stranggiesskokille nicht abgedeckt werden müssen. Zudem ist auch eine intermittierende Polumkehr Anode/Kathode möglich, mit der ein pulsierendes Abscheiden des Beschichtungsmaterials erreicht und die Beschichtung beeinflusst werden kann.With the method according to the invention, in which the mold cavity of the cathode-forming continuous casting mold is flowed through hydrodynamically controllable by the electrolyte using an insoluble anode, wherein the electrolyte alone supplies the coating material, both a thin layer of the wear-resistant material can be dimensionally accurate, without any need for reworking is, as well as a thick film (in which at best minimal rework occurs) are applied, since the layer structure evenly, without corner weaknesses occurs. A significant advantage of the inventive method is that in the galvanic coating, only the inner surfaces of the mold cavity come into contact with the electrolyte and therefore the outer surfaces of the continuous casting mold need not be covered. In addition, an intermittent pole reversal anode / cathode is possible with which a pulsating deposition of the coating material can be achieved and the coating can be influenced.
Als besonderer Vorteil sei hervorzuheben, dass die mechanischen Eigenschaften, wie beispielsweise die Härte, und insbesondere auch die Gefügestruktur der Beschichtung über den gesamten Bereich weitgehend gleichmässig gehalten werden können. Die Beschichtung kann schneller als mit den herkömmlichen Verfahren erzielt werden. Auch eine Knorpelbildung an den beschichteten Oberflächen kann weitgehend verhindert werden.A particular advantage should be emphasized that the mechanical properties, such as hardness, and in particular the microstructure of the coating over the entire area can be kept substantially uniform. The coating can be achieved faster than with the conventional methods. A cartilage formation on the coated surfaces can be largely prevented.
Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert.The invention will be explained in more detail with reference to the drawing.
Es zeigt:
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Fig. 1 ein Prinzipschema des erfindungsgemässen Verfahrens.
-
Fig. 1 a schematic diagram of the inventive method.
In
Der Stranggiesskokille 2 sind stirnseitig ein Kopf- sowie ein Bodenstück 5, 6 zugeordnet, die über eine den Formhohlraum 3 durchragende Anode 7 miteinander verbunden sind. Dichtungselemente 8, 9 an den Stirnflächen der Stranggiesskokille 2 dichten den Formhohlraum 3 ab. Auch die Anode 7 ist im Kopf- und Bodenstück 5, 6 dichtend eingesetzt, vgl. Dichtungen 13, 14. Sowohl das Bodenstück 6 als auch das Kopfstück 5 sind mit mindestens je einer, vorzugsweise mit einer Anzahl von Oeffnungen 11 bzw. 12 versehen (in
Für die galvanische Beschichtung ist die Stranggiesskokille 2 als Kathode und die Anode 7 mit angedeuteten Flügeln 7' an eine Gleichstromquelle 20 anschliessbar und bilden hierdurch einen Gleichstromkreis. Entweder die Dichtungselemente 8, 9 oder die Dichtungen 13, 14 wirken gleichzeitig elektrisch isolierend. Die Anode ist in ihrer Querschnittsform der Querschnittsform des Formhohlraumes 3 angepasst. Für polygonale Formhohlräume werden entsprechende prismatische Anoden verwendet. Die Anode besteht insbesondere aus einem Platin- oder Mischkeramik-beschichteten Titanmaterial oder aus Blei. Sie kann auch als Mehrfachanode ausgebildet sein. Grundsätzlich kann aber auch das Beschichtungsmaterial, wie zum Beispiel Kupfer, Nickel oder Chrom in der Anode enthalten sein, wobei es in Massiv- oder Stückform vorgesehen wäre.For the galvanic coating, the
Das erfindungsgemässe Verfahren ist zum Auftragen von beispielsweise Kupfer-, Nickel- oder Chromschichten geeignet. Das Beschichtungsmaterial wird durch den Elektrolyt 25 allein geliefert. Die Anode an sich ist unlöslich. Es kann sich zum Beispiel um platinbeschichtete Anoden aus Titan, Anoden aus Pb-Blech, beschichtete Mischkeramik und andere Materialien handeln. Bei den Elektrolyten können methansulfonsaure, cyanidische oder schwefelsaure Elektrolyttypen Anwendung finden. Mit diesen Hochgeschwindigkeitselektrolyten kann bei der intensiven Elektrolytbewegung eine Stromdichte von 20 bis 40 A/dm2 erreicht werden. Mit einer effizienten hydrodynamischen Steuerung des Elektrolytdurchflusses durch den Reaktorraum kann sowohl eine Dünnschicht des verschleissfesten Materials massgenau, ohne dass eine Nachbearbeitung notwendig ist, als auch eine Dickschicht (bei der allenfalls minimale Nacharbeit anfällt) aufgetragen werden, da der Schichtaufbau gleichmässig und ohne Eckschwächen erfolgt. Das erfindungsgemässe Verfahren bringt insbesondere bei Chrombeschichtung wesentliche Vorteile, da gerade bei Chrom bei der herkömmlichen galvanischen Beschichtung besonders stark Eckprobleme entstehen (Schicht 5 bis 10 mal kleiner als auf den Flächen), und der Chrom nur mit schleifen nachgearbeitet werden kann.The inventive method is suitable for applying, for example, copper, nickel or chromium layers. The coating material is supplied by the
Mit dem erfindungsgemässen Verfahren, bei welchem der Elektrolyt 25 allein das Beschichtungsmaterial liefert, kann auch pulsierendes Abscheiden des Beschichtungsmaterials erreicht werden, da neben der hydrodynamischen Steuerung auch eine intermittierende Polumkehr Anode/Kathode möglich ist und die Beschichtung beeinflussen kann.With the method according to the invention, in which the
Ein wesentlicher Vorteil des erfindungsgemässen Verfahrens besteht darin, dass bei der galvanischen Beschichtung lediglich die Innenflächen des Formholraumes mit dem Elektrolyt 25 in Kontakt kommen und daher die Aussenflächen der Stranggiesskokille nicht abgedeckt werden müssen.A significant advantage of the inventive method is that in the galvanic coating, only the inner surfaces of the mold cavity come into contact with the
Die Anode und/oder die Stranggiesskokille könnten im Prinzip um ihre Längsachse rotierbar ausgebildet sein, so dass eine Rotation während der Beschichtung und damit eine verbesserte Beschichtung ermöglicht werden könnte.The anode and / or the continuous casting mold could in principle be designed to be rotatable about its longitudinal axis, so that a rotation during the coating and thus an improved coating could be made possible.
Die Stranggiesskokille 2 wird vor der Beschichtung durch einen Spülprozess, insbesondere eine Kaskadenspülung, gereinigt, was nicht näher erläutert ist. Sie ist hierbei für die Beschichtung und vorzugsweise für diese Spülung in einem geschlossenen System eingebunden.The
Die Stranggiesskokille besteht aus einem metallischen Werkstoff oder Werkstoffverbund, wie Kupfer, Aluminium, Nickel, aus einem Kunststoff oder Verbundkunststoff oder aus einem Keramikwerkstoff oder anderen Werkstoffen.The continuous casting mold consists of a metallic material or material composite, such as copper, aluminum, nickel, of a plastic or composite plastic or of a ceramic material or other materials.
Es kann ferner eine Gleichrichtereinrichtung vorgesehen sein, mittels der die Stromrichtung zwecks Erzielung eines gleichmässigen Schichtauftragens umkehrbar ist.Furthermore, a rectifier device can be provided, by means of which the current direction can be reversed in order to achieve a uniform layer application.
Ferner wird bei Verwendung von Kupfer als Beschichtungsmaterial vorgängig ein käufliches Kupferoxyd genommen, bei welchem der zu grosse Chlorgehalt mittels eines Wasch-/Löse-Prozesses reduziert wird.Furthermore, when using copper as the coating material, a commercially available copper oxide is previously taken, in which the excessively high chlorine content is reduced by means of a washing / dissolving process.
Die Stranggiesskokille 2 kann alternativ nur in bestimmten Bereichen oder bei diesen Bereichen verstärkt, d.h. mit einer grösseren Schichtdicke, beschichtet werden, bei denen im Betrieb ein verhältnismässig höherer Verschleiss auftritt, beispielsweise im Bereich der Badoberfläche, bei dem insbesondere durch das Abdeckmaterial ein zusätzlicher Verschleiss auftritt. Damit wird eine effiziente Beschichtung erzielt. Ein solches partielles Beschichten kann durch teilweises Abdecken der Anode oder durch Einschieben von nicht leitenden Blenden oder durch ähnliche Massnahmen erzielt werden.The
Während des Beschichtungsvorganges können elektromagnetische Felder von nicht näher gezeigten Magneten erzeugt werden, durch welche die Partikel des Beschichtungsmaterials derart geleitet oder geführt werden, dass sich in bestimmten Bereichen, vorzugsweise in den Kantenbereichen der Stranggiesskokille, eine gleich dicke Schicht wie in den übrigen Bereichen abscheidet.During the coating process, electromagnetic fields can be generated by magnets not shown in detail by which the particles of the coating material are conducted or guided such that in certain areas, preferably in the edge regions of the continuous casting mold, an equally thick layer deposits as in the other areas.
Die Erfindung ist mit den obigen Ausführungen ausreichend dargetan. Sie könnte selbstverständlich noch in anderen Varianten veranschaulicht werden.The invention is sufficiently demonstrated with the above statements. It could of course be illustrated in other variants.
Claims (13)
- Process for electrolytic coating of a strand casting mould (2), in which the internal surfaces (4) of the strand casting mould (2), which demarcate a mould cavity (3), are coated with a coating material for the purpose of achieving or re-achieving intended mould cavity dimensions, the strand casting mould (2), as the cathode, an anode (7) positioned in the mould cavity (3) and an electrolyte (25) which contains the coating material being used, characterized in that an insoluble anode (7) having a cross sectional shape, which is adapted to the cross sectional shape of mold cavity (3), is introduced into the mold cavity (3), the mold cavity (3) is sealed at the face side with sealing elements (8, 9) and with a head - (5) and a bottom piece (6) and will be controlled flowed through by the electrolyte serving as carrier of the coating material, and that the current direction is changed periodically by means of a rectifier device or the like with pole-changing function, and by a corresponding choice of this periodic change a uniform layer application is achieved by this means.
- Process according to claim 1, characterized in that copper, nickel or chromium is used as the coating material and each is metered into the electrolyte (25) as oxide.
- Process according to claim 1 or 2, characterized in that an electrolyte (25) containing methanesulfonic acid, cyanide or sulfuric acid is used.
- Process according to any one of claims 1 to 3, characterized in that the anode (7) used in insoluble form, which can be also constructed as a multiple anode, is constructed from a platinum- or mixed ceramic-coated titanium material or from lead.
- Process according to any one of the claims 1 to 4, characterized in that the electrolyte (25) is pumped by means of a pump (16) into a reactor space which is surrounded by the internal surfaces (4) of the mould cavity (3) and is closed off at the faces by a base - and a head piece (6, 5), and is fed from this back to the pump (16).
- Process according to any one of the claims 1 to 5, characterized in that the anode (7) and/or the strand casting mould (2) are constructed rotatably around their longitudinal axis, so that rotation during the coating is rendered possible.
- Process according to any one of the claims 1 to 6, characterized in that the strand casting mould (2) is cleaned by a rinsing process, in particular a cascade rinsing, before the coating.
- Process according to any one of the claims 1 to 7, characterized in that the strand casting mould (2) is integrated in a closed system for the coating and preferably for the rinsing.
- Process according to any one of the claims 1 to 8, characterized in that the strand casting mould (2) is made from a metallic material or composite material, such as copper, aluminum, nickel, from a plastic or composite plastic or from a ceramic material or other materials.
- Process according to claim 1, characterized in that if copper is used, a commercially available copper oxide is used beforehand, in which the too high chlorine content is reduced by means of a washing-/dissolving process.
- Process according to any one of the claims 1 to 10, characterized in that the inner surfaces of a polygonal rectangular mold cavity cross section will be coated.
- Process according to claim 1, characterized in that the coating material, such as for example, copper, nickel or chromium, is employed as the anode.
- Process according to any one of the claims 1 to 12, characterized in that during the coating operation the particles of the coating material are conducted by electromagnetic fields such that in certain regions, in particular in the edge regions of the strand casting mould, a layer of the same thickness as in the other regions is deposited.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH8762002 | 2002-05-27 | ||
CH8762002 | 2002-05-27 | ||
PCT/EP2003/005238 WO2003099490A1 (en) | 2002-05-27 | 2003-05-19 | Method for the galvanic coating of a continuous casting mould |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1507612A1 EP1507612A1 (en) | 2005-02-23 |
EP1507612B1 true EP1507612B1 (en) | 2013-12-11 |
Family
ID=29555531
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03735416.4A Expired - Lifetime EP1507612B1 (en) | 2002-05-27 | 2003-05-19 | Method for the galvanic coating of a continuous casting mould |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP1507612B1 (en) |
JP (1) | JP5008111B2 (en) |
KR (1) | KR101082896B1 (en) |
CN (1) | CN100335200C (en) |
AU (1) | AU2003236679B2 (en) |
BR (1) | BR0311374B1 (en) |
CA (1) | CA2504369C (en) |
ES (1) | ES2452727T3 (en) |
MX (1) | MXPA04011734A (en) |
PL (1) | PL206254B1 (en) |
RU (1) | RU2318631C2 (en) |
WO (1) | WO2003099490A1 (en) |
ZA (1) | ZA200408991B (en) |
Families Citing this family (9)
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US9307648B2 (en) | 2004-01-21 | 2016-04-05 | Microcontinuum, Inc. | Roll-to-roll patterning of transparent and metallic layers |
US7329334B2 (en) * | 2004-09-16 | 2008-02-12 | Herdman Roderick D | Controlling the hardness of electrodeposited copper coatings by variation of current profile |
EP1849181A4 (en) * | 2005-01-21 | 2009-03-18 | Microcontinuum Inc | Replication tools and related fabrication methods and apparatus |
EA008676B1 (en) * | 2005-08-22 | 2007-06-29 | Республиканское Унитарное Предприятие "Белорусский Металлургический Завод" | Method for applying two-layer galvanic coating on copper sleeve and crystallizer plate |
CA2643510C (en) | 2006-02-27 | 2014-04-29 | Microcontinuum, Inc. | Formation of pattern replicating tools |
DE102006037728A1 (en) * | 2006-08-11 | 2008-02-14 | Sms Demag Ag | Mold for the continuous casting of liquid metal, in particular of steel materials |
DE202009013126U1 (en) | 2009-09-29 | 2009-12-10 | Egon Evertz Kg (Gmbh & Co.) | Mold for continuous casting |
US9589797B2 (en) | 2013-05-17 | 2017-03-07 | Microcontinuum, Inc. | Tools and methods for producing nanoantenna electronic devices |
CN107034497A (en) * | 2017-04-28 | 2017-08-11 | 长安大学 | A kind of electroplanting device for oil well pipe box cupling inner surface |
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JPS51116123A (en) * | 1975-04-04 | 1976-10-13 | Pioneer Electronic Corp | Electrocasting mold drawing method |
DE2936177A1 (en) * | 1979-09-07 | 1981-05-21 | Evertz, Egon, 5650 Solingen | Chill mould wall plating system - using currentless plating soln. for cooling grooves and electroplating inside wall |
JPS5647592A (en) * | 1979-09-25 | 1981-04-30 | Satoosen:Kk | Plating method of inner surface of casting mold for continuous casting |
JPS5937704B2 (en) * | 1980-06-02 | 1984-09-11 | 川崎製鉄株式会社 | Manufacturing method for continuous casting molds |
JPS60145247A (en) * | 1983-12-29 | 1985-07-31 | Kawasaki Steel Corp | Mold for continuous casting and its production |
JPS63104752A (en) * | 1986-10-22 | 1988-05-10 | Sumitomo Metal Ind Ltd | Surface treating method for mold for continuous casting |
JPH0222495A (en) * | 1988-07-11 | 1990-01-25 | Mitsubishi Heavy Ind Ltd | Method for plating mold for continuous casting |
JPH02149696A (en) * | 1988-11-30 | 1990-06-08 | Kawasaki Steel Corp | Method for controlling plating amount at plate edge in electroplating |
JPH071086A (en) * | 1993-06-15 | 1995-01-06 | Daido Steel Co Ltd | Method for repairing copper-made casting mold |
JPH07118889A (en) * | 1993-09-02 | 1995-05-09 | Yamaha Motor Co Ltd | Plating solution, plating method and interior plated engine cylinder |
US5516415A (en) * | 1993-11-16 | 1996-05-14 | Ontario Hydro | Process and apparatus for in situ electroforming a structural layer of metal bonded to an internal wall of a metal tube |
JP3333025B2 (en) * | 1993-12-08 | 2002-10-07 | 日本パーカライジング株式会社 | Electro-composite plating method and apparatus for metal material |
JPH07169714A (en) * | 1993-12-15 | 1995-07-04 | Casio Comput Co Ltd | Method and device for plating |
TW318320B (en) * | 1995-08-07 | 1997-10-21 | Eltech Systems Corp | |
FR2750438B1 (en) * | 1996-06-27 | 1998-08-07 | Usinor Sacilor | METHOD AND INSTALLATION FOR ELECTROLYTIC COATING WITH A METAL LAYER OF THE SURFACE OF A CYLINDER FOR CONTINUOUS CASTING OF THIN METAL STRIPS |
US6071398A (en) * | 1997-10-06 | 2000-06-06 | Learonal, Inc. | Programmed pulse electroplating process |
JP3375549B2 (en) * | 1998-09-29 | 2003-02-10 | 本田技研工業株式会社 | Composite plating method for cylindrical members |
FR2806098B1 (en) * | 2000-03-09 | 2002-08-16 | Usinor | DEVICE FOR ELECTRODEPOSITION OF AN ANNULAR METAL PART OF COMPLEX FORM |
-
2003
- 2003-05-19 AU AU2003236679A patent/AU2003236679B2/en not_active Ceased
- 2003-05-19 JP JP2004507003A patent/JP5008111B2/en not_active Expired - Fee Related
- 2003-05-19 EP EP03735416.4A patent/EP1507612B1/en not_active Expired - Lifetime
- 2003-05-19 PL PL371684A patent/PL206254B1/en unknown
- 2003-05-19 RU RU2004138096/02A patent/RU2318631C2/en not_active IP Right Cessation
- 2003-05-19 CN CNB038124483A patent/CN100335200C/en not_active Expired - Fee Related
- 2003-05-19 ES ES03735416.4T patent/ES2452727T3/en not_active Expired - Lifetime
- 2003-05-19 MX MXPA04011734A patent/MXPA04011734A/en active IP Right Grant
- 2003-05-19 KR KR1020047019176A patent/KR101082896B1/en not_active IP Right Cessation
- 2003-05-19 BR BRPI0311374-4A patent/BR0311374B1/en not_active IP Right Cessation
- 2003-05-19 CA CA002504369A patent/CA2504369C/en not_active Expired - Fee Related
- 2003-05-19 WO PCT/EP2003/005238 patent/WO2003099490A1/en active Application Filing
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2004
- 2004-11-05 ZA ZA200408991A patent/ZA200408991B/en unknown
Also Published As
Publication number | Publication date |
---|---|
CN100335200C (en) | 2007-09-05 |
BR0311374A (en) | 2005-03-15 |
EP1507612A1 (en) | 2005-02-23 |
WO2003099490A1 (en) | 2003-12-04 |
RU2004138096A (en) | 2005-06-10 |
MXPA04011734A (en) | 2005-11-04 |
RU2318631C2 (en) | 2008-03-10 |
ZA200408991B (en) | 2007-08-29 |
PL206254B1 (en) | 2010-07-30 |
KR20050004877A (en) | 2005-01-12 |
BR0311374B1 (en) | 2011-08-23 |
CA2504369C (en) | 2008-11-18 |
AU2003236679B2 (en) | 2008-08-28 |
AU2003236679A1 (en) | 2003-12-12 |
CA2504369A1 (en) | 2003-12-04 |
JP5008111B2 (en) | 2012-08-22 |
ES2452727T3 (en) | 2014-04-02 |
CN1655893A (en) | 2005-08-17 |
JP2005527705A (en) | 2005-09-15 |
PL371684A1 (en) | 2005-06-27 |
KR101082896B1 (en) | 2011-11-11 |
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