EP1628786B1 - Method for separating cropped layers from plated strips by roll bonding - Google Patents

Method for separating cropped layers from plated strips by roll bonding Download PDF

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Publication number
EP1628786B1
EP1628786B1 EP04767217A EP04767217A EP1628786B1 EP 1628786 B1 EP1628786 B1 EP 1628786B1 EP 04767217 A EP04767217 A EP 04767217A EP 04767217 A EP04767217 A EP 04767217A EP 1628786 B1 EP1628786 B1 EP 1628786B1
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European Patent Office
Prior art keywords
plated
layers
strips
plates
process according
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EP04767217A
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German (de)
French (fr)
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EP1628786A1 (en
Inventor
Sandrine Dulac
Christian Barthelemy
Sylvain Henry
Armand Gabriel
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Constellium Issoire SAS
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Alcan Rhenalu SAS
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
    • B21B47/04—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal for separating layers after rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • 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
    • B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • B21B2001/383—Cladded or coated products
    • 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
    • B21B2003/001—Aluminium or its alloys
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12583—Component contains compound of adjacent metal

Definitions

  • the invention relates to a method of separating the different layers of veneer strips, the veneer of which is operated by bonding.
  • the falls result from shearing the edges and ends of the plated strip at various stages of their manufacturing range.
  • metal strips consisting of two or more layers of different metals or alloys plated on each other by simultaneous rolling hot and / or cold.
  • metals or alloys there is a large production of alloy AlMn or AlFe alloy strips AlSi; these strips are especially intended for the manufacture of brazed heat exchangers, AlSi plating alloy serving brazing alloy.
  • One known means for achieving this separation is to wear the plated drops at a temperature between the melting temperatures of the two metals or alloys to be separated.
  • Such a method is described, for example, in US Pat. No. 4,003,362 for steel-aluminum plated strips, and in patent applications WO 99/32260 and US Pat.
  • a method of this type requires high energy consumption and expensive investments in ovens.
  • the object of the invention is to provide a simple, economical and easily industrializable separation process.
  • the subject of the invention is a method for manufacturing plated strips comprising at least two layers of different metals or alloys, allowing the subsequent separation of the different layers of the falls resulting from the shearing of the plated strips, comprising the preparation of plates corresponding to each of the layers. plating, superimposing and assembling these plates to form a composite plate, hot rolling and possibly cold rolling of this composite plate to obtain a plated strip, and shearing the areas to be dropped during or following the rolling, in which process, before superimposing the different plates, is deposited a release agent on the areas to be dropped from at least one of the surfaces of the plates that will be in contact with one another.
  • the non-stick product is preferably a slip having a ceramic oxide in an aqueous or organic solvent.
  • the manufacture of plated metal strips comprises the preparation, by casting and optionally rolling, of plates of different thickness, corresponding to the different layers of the product to be produced.
  • the plates are then superimposed and fixed to the adjacent plate, for example by dots or welds.
  • the assembly is then hot rolled, and possibly, if the final thickness to achieve the requires, cold rolled.
  • the rolling is done in a number of passes with, if necessary, one or intermediate annealing between certain passes.
  • the invention consists, in its most general scope, to allow easy separation of the different layers of the slips of the plated strips by depositing, on the areas to be dropped, in particular the edges, at least one of the plates to be superposed. one on the other, a release agent, that is to say a product which, after undergoing thermomechanical treatments corresponding to hot rolling and possibly cold, and any intermediate annealing, avoids locally the welding one layer on the other, and thus allows easy separation of the layers.
  • a particularly suitable type of deposit consists of a slip consisting of a mineral powder, in particular an oxide or a boride, and a silicone resin in solution in an organic phase or in suspension in an aqueous phase.
  • the patent application FR 2830857 describes such products in the organic phase to obtain protective coatings for materials or pieces of equipment intended to be exposed to an oxidizing environment, to the liquid metal or to a molten salt.
  • This slip can be deposited by any appropriate means, for example by brush, roller or spray. It can be also by electrostatic powdering.
  • the deposited product is polymerized by heating at a temperature of the order of 500 ° C.
  • This heating can be achieved by using for example a projection with a heating gun. It is also possible to use the preheating step of the plate before hot rolling.
  • the deposited product does not cause any inconvenience to subsequent rolling operations, that it does not migrate into the inner part of the plates, nor is it expelled outwards.
  • the layers of the dropped parts especially those from the hot-rolled strips, are easily separated by simple peeling. Peeling is a little less easy for cold-rolled strips, especially in the case of thin strips, because the layers are too thin to remain in one piece.
  • the separation according to the invention can be combined, if necessary, with the other techniques of the prior art, that is to say the thermal separation at an intermediate temperature between the solidus temperatures of the superimposed alloys, or the mechanical separation. using abrasive tools or shearing tools.
  • An alloy plate 3003 of 350 ⁇ 500 mm and a thickness of 120 mm was cast and prepared by casting and rolling an alloy plate 4343 of a slightly smaller size and 13 mm thick.
  • the plates were degreased with xylene.
  • a slurry based on alumina dispersed in aqueous phase was produced.
  • Alumina is the product P152SB Aluminum Pechiney to the particle size d 50 of 1.5 microns and a BET specific surface area of about 3 m 2 / g. 100 g of this alumina, 17 g of silicone resin (poly-methyl-siloxane) MK from Wacker Chemie and 50 g of deionized water were mixed. The mixture is stirred for one hour.
  • a layer of this slip of width 50 mm was deposited on the two edges of the plate at 3003 by brush, this zone representing the width of the edges that it is desired to shear.
  • the deposit is then polymerized by heating with a slow rise up to 500 ° C. and then held for 4 hours in an air oven.
  • the 4343 cover plate is then deposited on the plate at 3003 and the two plates are welded using a few MIG welding spots.
  • the assembly is then hot rolled, conventionally, to a thickness of 3 mm. Shearing of both banks was then carried out over a width of 50 mm each.
  • the strip was then cold rolled to a final thickness of 0.5 mm, which corresponds to a usual thickness for plated strips for the manufacture of brazed heat exchangers used in the automobile.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Laminated Bodies (AREA)
  • Metal Rolling (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Description

Domaine de l'inventionField of the invention

L'invention concerne un procédé de séparation des différentes couches de chutes de bandes plaquées, dont le placage est opéré par colaminage. Plus particulièrement, les chutes résultent du cisaillage des rives et des extrémités de la bande plaquée aux divers stades de leur gamme de fabrication.The invention relates to a method of separating the different layers of veneer strips, the veneer of which is operated by bonding. In particular, the falls result from shearing the edges and ends of the plated strip at various stages of their manufacturing range.

Etat de la techniqueState of the art

Il est connu depuis de longues années de fabriquer des bandes métalliques constituées de deux ou plusieurs couches de différents métaux ou alliages plaquées les unes sur les autres par laminage simultané à chaud et/ou à froid. Par exemple, dans le cas des alliages d'aluminium, il existe une production importante de bandes en alliage AlMn ou AlFe plaquées d'alliage AlSi ; ces bandes sont notamment destinées à la fabrication d'échangeurs de chaleur brasés, l'alliage de placage AlSi servant d'alliage de brasage.It has been known for many years to manufacture metal strips consisting of two or more layers of different metals or alloys plated on each other by simultaneous rolling hot and / or cold. For example, in the case of aluminum alloys, there is a large production of alloy AlMn or AlFe alloy strips AlSi; these strips are especially intended for the manufacture of brazed heat exchangers, AlSi plating alloy serving brazing alloy.

La fabrication de bandes métalliques génère, aux divers stades de cette fabrication, des chutes ou rebuts en quantité relativement importante, qui sont le plus souvent recyclés dans l'usine même par addition au métal primaire servant à la coulée des demi-produits. Dans le cas des bandes plaquées comportant des métaux ou alliages différents, le recyclage direct des chutes dans le four d'élaboration du métal pour coulée conduit à un alliage différent des alliages de départ, qui n'est pas toujours utilisable. On a donc cherché à séparer les différentes couches des chutes de bandes plaquées pour permettre leur recyclage séparé dans le processus de production.The manufacture of metal strips generates, in the various stages of this manufacture, falls or scrap in a relatively large quantity, which are most often recycled in the plant even by addition to the primary metal used for casting semi-finished products. In the case of plated strips with different metals or alloys, the direct recycling of the falls in the casting furnace leads to a different alloy of the starting alloys, which is not always usable. It has therefore been sought to separate the different layers of the slips of plated strips to allow their separate recycling in the production process.

Un moyen connu pour réaliser cette séparation est de porter les chutes plaquées à une température comprise entre les températures de fusion des deux métaux ou alliages à séparer. Un tel procédé est décrit par exemple dans le brevet US 4203762 pour des bandes plaquées acier-aluminium, et dans les demandes de brevet WO 99/32260 et WO 00/67942 pour des bandes en alliage d'aluminium AlMn plaquées avec un alliage AlSi destinées à la fabrication d'échangeurs de chaleur brasés, la séparation thermique étant accompagnée d'une séparation mécanique, par abrasion ou cisaillement.. Un procédé de ce type nécessite une grande consommation d'énergie et des investissements coûteux en fours.One known means for achieving this separation is to wear the plated drops at a temperature between the melting temperatures of the two metals or alloys to be separated. Such a method is described, for example, in US Pat. No. 4,003,362 for steel-aluminum plated strips, and in patent applications WO 99/32260 and US Pat. WO 00/67942 for aluminum alloy strips AlMn plated with an AlSi alloy for the manufacture of brazed heat exchangers, the thermal separation being accompanied by a mechanical separation, by abrasion or shearing. A method of this type requires high energy consumption and expensive investments in ovens.

Le but de l'invention est de procurer un procédé de séparation simple, économique et facilement industrialisable.The object of the invention is to provide a simple, economical and easily industrializable separation process.

Objet de l'inventionObject of the invention

L'invention a pour objet un procédé de fabrication de bandes plaquées comportant au moins deux couches de métaux ou alliages différents, permettant la séparation ultérieure des différentes couches des chutes résultant du cisaillage des bandes plaquées, comportant la préparation de plaques correspondant à chacune des couches du placage, la superposition et l'assemblage de ces plaques pour former une plaque composite, le laminage à chaud et éventuellement à froid de cette plaque composite pour obtenir une bande plaquée, et le cisaillage des zones à chuter au cours ou à la suite du laminage, procédé dans lequel, avant de superposer les différentes plaques, on dépose un produit anti-adhésif sur les zones destinées à être chutées d'au moins une des surfaces des plaques qui seront en contact l'une sur l'autre.The subject of the invention is a method for manufacturing plated strips comprising at least two layers of different metals or alloys, allowing the subsequent separation of the different layers of the falls resulting from the shearing of the plated strips, comprising the preparation of plates corresponding to each of the layers. plating, superimposing and assembling these plates to form a composite plate, hot rolling and possibly cold rolling of this composite plate to obtain a plated strip, and shearing the areas to be dropped during or following the rolling, in which process, before superimposing the different plates, is deposited a release agent on the areas to be dropped from at least one of the surfaces of the plates that will be in contact with one another.

Le produit antiadhésif est de préférence une barbotine comportant un oxyde céramique dans un solvant aqueux ou organique.The non-stick product is preferably a slip having a ceramic oxide in an aqueous or organic solvent.

Description de l'inventionDescription of the invention

La fabrication de bandes métalliques plaquées comporte la préparation, par coulée et éventuellement laminage, de plaques d'épaisseur différente, correspondant aux différentes couches du produit à réaliser. Les plaques sont ensuite superposées et fixées à la plaque adjacente, par exemple par des points ou des cordons de soudure. L'ensemble est ensuite laminé à chaud, et éventuellement, si l'épaisseur finale à atteindre le nécessite, laminé à froid. Le laminage se fait en un certain nombre de passes avec, si nécessaire, un ou des recuits intermédiaires entre certaines passes.The manufacture of plated metal strips comprises the preparation, by casting and optionally rolling, of plates of different thickness, corresponding to the different layers of the product to be produced. The plates are then superimposed and fixed to the adjacent plate, for example by dots or welds. The assembly is then hot rolled, and possibly, if the final thickness to achieve the requires, cold rolled. The rolling is done in a number of passes with, if necessary, one or intermediate annealing between certain passes.

Il est habituel, à la sortie du laminage à chaud, et une nouvelle fois après laminage à froid, de cisailler les rives, les extrémités ou d'autres zones des bandes qui peuvent présenter des défauts ou des criques. Cette opération est encore plus nécessaire pour les bandes plaquées, les différentes couches pouvant avoir un profil de rive ou d'extrémité différent. Pour des raisons économiques évidentes, les chutes doivent être récupérées pour être recyclées dans le four de fusion servant à la coulée des plaques de départ, comme c'est le cas pour les bandes non plaquées. Mais un tel recyclage n'est possible que si on sépare les différentes couches plaquées les unes des autres.It is usual, at the exit of the hot rolling, and again after cold rolling, to shear the edges, ends or other areas of the strips that may have defects or cracks. This operation is even more necessary for the plated strips, the different layers may have a different edge or end profile. For obvious economic reasons, the falls must be recovered for recycling into the melting furnace for the casting of the starting plates, as is the case for uncladged strips. But such a recycling is possible only if we separate the different layers plated from each other.

L'invention consiste, dans sa portée la plus générale, à permettre une séparation aisée des différentes couches des chutes des bandes plaquées en déposant, sur les zones à chuter, notamment les bords, de l'une au moins des plaques à superposer l'une sur l'autre, un produit anti-adhésif, c'est-à-dire un produit qui, après avoir subi les traitements thermo-mécaniques correspondant au laminage à chaud et éventuellement à froid, et les recuits intermédiaires éventuels, évite localement le soudage d'une couche sur l'autre, et permette ainsi une séparation aisée des couches.The invention consists, in its most general scope, to allow easy separation of the different layers of the slips of the plated strips by depositing, on the areas to be dropped, in particular the edges, at least one of the plates to be superposed. one on the other, a release agent, that is to say a product which, after undergoing thermomechanical treatments corresponding to hot rolling and possibly cold, and any intermediate annealing, avoids locally the welding one layer on the other, and thus allows easy separation of the layers.

Un type de dépôt particulièrement bien adapté consiste en une barbotine constituée d'une poudre minérale, notamment un oxyde ou un borure, et d'une résine silicone en solution dans une phase organique ou en suspension dans une phase aqueuse. La demande de brevet FR 2830857 décrit de tels produits en phase organique pour obtenir des revêtements protecteurs de matériaux ou de pièces d'équipement destinés à être exposés à un environnement oxydant, à du métal liquide ou à un sel fondu.A particularly suitable type of deposit consists of a slip consisting of a mineral powder, in particular an oxide or a boride, and a silicone resin in solution in an organic phase or in suspension in an aqueous phase. The patent application FR 2830857 describes such products in the organic phase to obtain protective coatings for materials or pieces of equipment intended to be exposed to an oxidizing environment, to the liquid metal or to a molten salt.

Cette barbotine peut être déposée par tout moyen approprié, par exemple au pinceau, au rouleau ou au pistolet. Elle peut l'être également par poudrage électrostatique.This slip can be deposited by any appropriate means, for example by brush, roller or spray. It can be also by electrostatic powdering.

Après dépôt, le produit déposé est polymérisé par chauffage à une température de l'ordre de 500°C. Ce chauffage peut être réalisé en utilisant par exemple une projection avec un pistolet chauffant. On peut également utiliser l'étape de préchauffage de la plaque avant laminage à chaud.After deposition, the deposited product is polymerized by heating at a temperature of the order of 500 ° C. This heating can be achieved by using for example a projection with a heating gun. It is also possible to use the preheating step of the plate before hot rolling.

L'expérience montre que le produit déposé n'entraîne aucune gêne pour les opérations ultérieures de laminage, qu'il ne migre pas dans la partie intérieure des plaques, et qu'il n'est pas non plus expulsé vers l'extérieur. Les couches des parties chutées, notamment celles issues des bandes laminées à chaud, se séparent facilement par simple pelage. Le pelage est un peu moins aisé pour les bandes laminées à froid, en particulier dans le cas de bandes minces, car les couches sont trop minces pour rester d'un seul tenant.Experience shows that the deposited product does not cause any inconvenience to subsequent rolling operations, that it does not migrate into the inner part of the plates, nor is it expelled outwards. The layers of the dropped parts, especially those from the hot-rolled strips, are easily separated by simple peeling. Peeling is a little less easy for cold-rolled strips, especially in the case of thin strips, because the layers are too thin to remain in one piece.

On peut combiner, si nécessaire, la séparation selon l'invention avec les autres techniques de l'art antérieur, c'est-à-dire la séparation thermique à une température intermédiaire entre les températures de solidus des alliages superposés, ou la séparation mécanique à l'aide d'outils abrasifs ou de cisaillement.The separation according to the invention can be combined, if necessary, with the other techniques of the prior art, that is to say the thermal separation at an intermediate temperature between the solidus temperatures of the superimposed alloys, or the mechanical separation. using abrasive tools or shearing tools.

ExempleExample

On a coulé une plaque en alliage 3003 de format 350 x 500 mm et d'épaisseur 120 mm et préparé par coulée et laminage une plaque en alliage 4343 de format un peu plus réduit et d'épaisseur 13 mm. Les plaques ont été dégraissées au xylène.An alloy plate 3003 of 350 × 500 mm and a thickness of 120 mm was cast and prepared by casting and rolling an alloy plate 4343 of a slightly smaller size and 13 mm thick. The plates were degreased with xylene.

On a réalisé une barbotine à base d'alumine dispersée en phase aqueuse. L'alumine est le produit P152SB d'Aluminium Pechiney à la granulométrie d50 de 1,5 µm et de surface spécifique BET d'environ 3 m2/g. On a mélangé 100 g de cette alumine, 17 g de résine silicone (poly-méthyl-siloxane) MK de la société Wacker Chemie et 50 g d'eau permutée. Le mélange est agité pendant une heure.A slurry based on alumina dispersed in aqueous phase was produced. Alumina is the product P152SB Aluminum Pechiney to the particle size d 50 of 1.5 microns and a BET specific surface area of about 3 m 2 / g. 100 g of this alumina, 17 g of silicone resin (poly-methyl-siloxane) MK from Wacker Chemie and 50 g of deionized water were mixed. The mixture is stirred for one hour.

On a déposé au pinceau une couche de cette barbotine de largeur 50 mm sur les deux bords de la plaque en 3003, cette zone représentant la largeur des rives que l'on souhaite cisailler. Le dépôt est ensuite polymérisé par chauffage avec montée lente jusqu'à 500°C, puis maintien pendant 4 h dans un four à air.A layer of this slip of width 50 mm was deposited on the two edges of the plate at 3003 by brush, this zone representing the width of the edges that it is desired to shear. The deposit is then polymerized by heating with a slow rise up to 500 ° C. and then held for 4 hours in an air oven.

On dépose ensuite sur la plaque en 3003 la plaque de couverture en 4343 et on soude les deux plaques à l'aide de quelques points de soudure MIG. L'ensemble est alors laminé à chaud, de manière conventionnelle, jusqu'à une épaisseur de 3 mm. On a procédé ensuite au cisaillage des deux rives sur une largeur de 50 mm chacune. La bande a été ensuite laminée à froid jusqu'à l'épaisseur finale de 0,5 mm, qui correspond à une épaisseur habituelle pour les bandes plaquées destinées à la fabrication des échangeurs de chaleur brasés utilisés dans l'automobile.The 4343 cover plate is then deposited on the plate at 3003 and the two plates are welded using a few MIG welding spots. The assembly is then hot rolled, conventionally, to a thickness of 3 mm. Shearing of both banks was then carried out over a width of 50 mm each. The strip was then cold rolled to a final thickness of 0.5 mm, which corresponds to a usual thickness for plated strips for the manufacture of brazed heat exchangers used in the automobile.

Pour les chutes de rives de bandes laminées à chaud, on peut très facilement séparer la couche en alliage 3003 de la couche en 4343, par exemple à l'aide d'un simple tournevis. Cette séparation est également aisée sur les chutes de rives des bandes laminées à froid, mais la couche de 4343 est trop mince et trop fragile, et elle se déchire en lambeaux.For strip falls of hot-rolled strips, it is very easy to separate the alloy layer 3003 from the layer 4343, for example with a simple screwdriver. This separation is also easy on the waterfalls of the bands Cold rolled, but the 4343 layer is too thin and fragile, and it rips to shreds.

Claims (6)

  1. Process for the manufacture of plated strips comprising at least two layers of different metals or alloys, that allows the subsequent separation of the different cropped layers resulting from shearing the plated strips, comprising the preparation of plates corresponding to each of the plating layers, the superimposition and assembly of these plates to form a composite plate, the hot and possibly cold rolling of this composite plate to obtain a plated strip, and the shearing of the cropping areas during or after rolling, a process characterised in that, prior to superimposing the different plates, an anti-sticking agent is applied to the cropping areas of at least one of the surfaces of the plates which will be in contact with each other.
  2. Process according to claim 1, characterised in that the anti-sticking agent is a mixture of a mineral powder and a silicon resin in suspension in water or in organic solution.
  3. Process according to claim 2, characterised in that the mineral powder is an oxide or a boride.
  4. Process according to claim 3, characterised in that the mineral powder is alumina.
  5. Process according to one of the claims 1 to 4, characterised in that the anti-sticking agent is applied by electrostatic dusting.
  6. Process according to one of the claims 1 to 5, characterised in that the plated strip is constituted by at least two different aluminium alloys.
EP04767217A 2003-06-05 2004-06-01 Method for separating cropped layers from plated strips by roll bonding Active EP1628786B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0306781A FR2855774B1 (en) 2003-06-05 2003-06-05 METHOD FOR SEPARATING THE FALL LAYERS OF PLATED BANDS BY COLAMINING
PCT/FR2004/001342 WO2005002750A1 (en) 2003-06-05 2004-06-01 Method for separating cropped layers from plated strips by roll bonding

Publications (2)

Publication Number Publication Date
EP1628786A1 EP1628786A1 (en) 2006-03-01
EP1628786B1 true EP1628786B1 (en) 2006-11-22

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EP04767217A Active EP1628786B1 (en) 2003-06-05 2004-06-01 Method for separating cropped layers from plated strips by roll bonding

Country Status (6)

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US (1) US8210421B2 (en)
EP (1) EP1628786B1 (en)
DE (1) DE602004003371T2 (en)
FR (1) FR2855774B1 (en)
WO (1) WO2005002750A1 (en)
ZA (1) ZA200509842B (en)

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CN104492810A (en) * 2014-10-27 2015-04-08 南京钢铁股份有限公司 Preparation method of wide and thin hot-rolled steel plates with width-to-thickness ratio being greater than or equal to 500
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US8210421B2 (en) 2012-07-03
EP1628786A1 (en) 2006-03-01
DE602004003371T2 (en) 2007-10-18
FR2855774B1 (en) 2005-07-08
US20070031695A1 (en) 2007-02-08

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