EP0490800A1 - Cylinder for single-roll or twin-roll continuous casting. - Google Patents
Cylinder for single-roll or twin-roll continuous casting. Download PDFInfo
- Publication number
- EP0490800A1 EP0490800A1 EP91470038A EP91470038A EP0490800A1 EP 0490800 A1 EP0490800 A1 EP 0490800A1 EP 91470038 A EP91470038 A EP 91470038A EP 91470038 A EP91470038 A EP 91470038A EP 0490800 A1 EP0490800 A1 EP 0490800A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ferrule
- support part
- hand
- cylinder according
- support
- 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.)
- Granted
Links
- 238000009749 continuous casting Methods 0.000 title claims description 5
- 238000009792 diffusion process Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000007906 compression Methods 0.000 claims abstract description 11
- 230000006835 compression Effects 0.000 claims abstract description 11
- 238000003466 welding Methods 0.000 claims abstract description 9
- 239000004020 conductor Substances 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000003754 machining Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 2
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 239000011257 shell material Substances 0.000 description 17
- 239000002131 composite material Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 229910017526 Cu-Cr-Zr Inorganic materials 0.000 description 3
- 229910017810 Cu—Cr—Zr Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000012809 cooling fluid Substances 0.000 description 2
- 239000000542 fatty acid esters of ascorbic acid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Images
Classifications
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0648—Casting surfaces
- B22D11/0651—Casting wheels
Definitions
- the present invention relates to the continuous casting of metal strips, in particular of steel, on a cylinder or between two cylinders. More specifically, it relates to this type of cylinders which commonly consist of a rigid internal core and an energetically cooled external shell, in contact with which the cast metal cools and solidifies to form the strip which is continuously extracted. due to the rotation of the cylinder (s).
- the ferrule is commonly cooled from the inside, for example by circulation of a cooling fluid in channels drilled through its thickness.
- the material constituting the shell is a good conductor of heat, for example copper or one of its alloys.
- this ferrule must be rigid enough not to deform under the effect of the mechanical and thermal stresses to which it is subjected during casting.
- the ferrule is a large piece, massive and thick because it must in particular include the cooling channels and mechanical anchoring means on the core. .
- Such a ferrule is described for example in French patent application No. 2,654,372 published May 17, 1991.
- This document describes a casting cylinder for continuous casting on or between two such cylinders, comprising a core and a ferrule rigidly connected to the core in its middle part and over its entire circumference by a dovetail or T-shaped assembly
- the ferrule is in contact with the core over its entire width and is maintained by its edges thereon by means allowing axial displacement but preventing the radial displacement of said edges of the shell relative to the core.
- the object of the present invention is to eliminate or at least reduce these drawbacks, without harming the thermal and mechanical characteristics of the shell.
- the invention relates to a cylinder for a continuous casting installation on one or between two such cylinders comprising an outer shell made of a material which is good conductor of heat and a central core, characterized in that the shell is linked to an underlying cylindrical support piece over their entire contact surface by a metallurgical bond without fusion produced by welding-diffusion.
- the core can itself constitute the support part, or, preferably, this support part is an annular part whose external surface is cylindrical, and which includes inside means for mechanical connection to the core.
- the ferrule which is made of a material which is necessarily a good conductor of heat, such as copper or a copper alloy, is generally not capable of undergoing significant mechanical stresses. Thanks to the invention, in fact a composite part is produced which has at its periphery the characteristics required thermally, and inside the mechanical characteristics necessary to resist the various mechanical stresses which are exerted on the cylinder during casting.
- machining operations necessary for the connection of the ferrule-support part assembly to the cylinder core are more easily achievable on steel or cast iron of which the support part can for example be made.
- the cylinder comprises at the interface between the ferrule and the support piece a thin layer of a metal or alloy capable of being assembled by diffusion welding on the one hand with the metal constituting the ferrule and on the other share with that of the support piece.
- cooling channels are drilled in the thickness of the ferrule parallel to its axis, supply and return channels pass through the ferrule-support part interface and tubes are placed in these supply channels and back at the interface so as to provide a seal between them and on the one hand the ferrule and on the other hand the support part.
- the cylinder has grooves made at the ferrule-support part interface, and tubes are placed in these grooves and tightly connected at their ends with on the one hand the ferrule and on the other hand the support piece.
- the cylinder 1 shown in FIG. 1 comprises a core 2, an annular support piece 3 held on the core by two annular flanges 4 and tie rods represented only by their axes 5.
- the external ferrule 6 is assembled on the support part 3 by its diffusion welding, this assembly being carried out beforehand by hot isostatic compression, which leads to obtaining a composite ferrule-support part part, which will be called by the composite ferrule suite.
- Diffusion welding by hot isostatic compression makes it possible to obtain a diffusion bond in the solid state.
- This assembly technique requires high pressure and a moderate temperature of the parts to be assembled which does not reach their melting temperature as is the case in conventional welding.
- the high pressure of the two parts on each other leads to intimate contact of the facing surfaces and to the production of a metallic junction without pores by reciprocal diffusion of the metals through the interface.
- the composite ferrule (3,6) may comprise at the interface between the ferrule 6 and the support part 3 a thin layer of a metal or alloy, for example nickel or an iron-nickel alloy with 42% nickel, which is able to be assembled by hot isostatic compression with one and the other of the constituent metals of the shell and of the support part, which makes it possible for example to produce these in metals difficult to assemble directly using this technique.
- a metal or alloy for example nickel or an iron-nickel alloy with 42% nickel
- the ferrule 6 is made of a material having good thermal conductivity and sufficient mechanical resistance characteristics at relatively high temperatures, above 400 ° C., such as for example a Cu-Cr-Zr alloy preferably in the hyper-soaked state .
- the support part is a material having good mechanical characteristics at room temperature, easily machinable, and whose coefficient of expansion is preferably equal to or greater than that of the shell material, such as for example austenitic cast iron GS to 18 % Ni or type 304 austenitic stainless steel.
- the core is preferably made of steel or stainless steel.
- the composite shell thus obtained can then be machined, or undergo the specific heat treatments necessary to obtain the metallurgical characteristics required for its use.
- cooling channels 7 are drilled axially in the shell, as well as holes 10 intended to allow the supply or return of a cooling fluid.
- Corresponding holes 10 ′ are produced in the support piece 3.
- tubes 11 are introduced into the holes 10 and 10 ′ so as to cover the interface 9 and seal it, this seal being also provided on the edges of the shell by the welds 12. The tubes 11 therefore allow on the one hand to seal of the interface necessary during the hot isostatic compression operation, and on the other hand to balance the pressure inside the cooling channels 7 to avoid the risk of their deformation due to the high pressures applied at the periphery of the shell.
- cooling channels 7 are located at the shell-support part interface.
- Grooves 13 are machined inside the shell 6 before it is assembled on the support part 3. It will be noted that it is easier to machine such grooves than to drill orifices over a great length. Tubes 14 are placed in these grooves and, after the ferrule has been placed on the support piece, welded at their ends 15. The sealing of the interface 9 is thus ensured, as is the pressure balancing of the inside the tubes 14.
- hot isostatic compaction can be carried out by the technique consisting in coating the assembled parts with a sealed container outside of which the pressure is applied.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Continuous Casting (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
- Crushing And Grinding (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Contacts (AREA)
Abstract
Description
La présente invention concerne la coulée continue de bandes de métal, notamment d'acier, sur un cylindre ou entre deux cylindres. Elle a plus précisément pour objet ce type de cylindres qui sont couramment constitués d'un noyau interne rigide et d'une virole externe énergiquement refroidie, au contact de laquelle le métal coulé se refroidit et se solidifie pour former la bande qui est extraite en continu du fait de la rotation du ou des cylindres.The present invention relates to the continuous casting of metal strips, in particular of steel, on a cylinder or between two cylinders. More specifically, it relates to this type of cylinders which commonly consist of a rigid internal core and an energetically cooled external shell, in contact with which the cast metal cools and solidifies to form the strip which is continuously extracted. due to the rotation of the cylinder (s).
Couramment la virole est refroidie de l'intérieur, par exemple par circulation d'un fluide de refroidissement dans des canaux forés dans son épaisseur. Pour assurer un refroidissement énergique du métal coulé, le matériau constitutif de la virole est bon conducteur de la chaleur, par exemple en cuivre ou un de ses alliages.The ferrule is commonly cooled from the inside, for example by circulation of a cooling fluid in channels drilled through its thickness. To ensure vigorous cooling of the cast metal, the material constituting the shell is a good conductor of heat, for example copper or one of its alloys.
Par ailleurs cette virole doit être suffisamment rigide pour ne pas se déformer sous l'effet des contraintes mécaniques et thermiques auxquelles elle est soumise lors de la coulée.Furthermore, this ferrule must be rigid enough not to deform under the effect of the mechanical and thermal stresses to which it is subjected during casting.
Elle doit également être rigidement liée au noyau du cylindre pour éviter tout déplacement relatif.It must also be rigidly linked to the cylinder core to avoid any relative displacement.
Il en résulte que dans des installations industrielles où le diamètre et la largeur des cylindres sont importants, la virole est une pièce de grandes dimensions, massive et épaisse car elle doit notamment comporter les canaux de refroidissement et des moyens d'ancrage mécanique sur le noyau.As a result, in industrial installations where the diameter and the width of the cylinders are large, the ferrule is a large piece, massive and thick because it must in particular include the cooling channels and mechanical anchoring means on the core. .
Une telle virole est décrite par exemple dans la demande de brevet français n° 2 654 372 publiée le 17 mai 1991. Ce document décrit un cylindre de coulée pour la coulée continue sur ou entre deux tels cylindres, comportant un coeur et une virole liée rigidement au coeur dans sa partie médiane et sur toute sa circonférence par un assemblage en queue d'aronde ou en forme de glissière en T. La virole est au contact du coeur sur toute sa largeur et elle est maintenue par ses bords sur celui-ci par des moyens autorisant un déplacement axial mais empêchant le déplacement radial desdits bords de la virole par rapport au coeur.Such a ferrule is described for example in French patent application No. 2,654,372 published May 17, 1991. This document describes a casting cylinder for continuous casting on or between two such cylinders, comprising a core and a ferrule rigidly connected to the core in its middle part and over its entire circumference by a dovetail or T-shaped assembly The ferrule is in contact with the core over its entire width and is maintained by its edges thereon by means allowing axial displacement but preventing the radial displacement of said edges of the shell relative to the core.
Or la fabrication de telles pièces pose de nombreux problèmes. Il est en particulier difficile d'obtenir lors du moulage de la virole une homogénéité suffisante du métal qui la constitue. De plus les usinages nécessaires pour la réalisation des canaux de refroidissement et des moyens de liaison au noyau sont généralement délicats à effectuer dans les alliages de cuivre utilisés. En fin, ces matériaux sont coûteux.However, the manufacture of such parts poses many problems. It is in particular difficult to obtain, during the molding of the shell, sufficient homogeneity of the metal which constitutes it. In addition, the machining operations necessary for producing the cooling channels and the means for connecting to the core are generally difficult to carry out in the copper alloys used. In the end, these materials are expensive.
Le but de la présente invention est de supprimer ou tout au moins réduire ces inconvénients, sans nuire aux caractéristiques thermiques et mécaniques de la virole.The object of the present invention is to eliminate or at least reduce these drawbacks, without harming the thermal and mechanical characteristics of the shell.
Avec ces objectifs en vue, l'invention a pour objet un cylindre pour une installation de coulée continue sur un ou entre deux tels cylindres comprenant une virole extérieure en matériau bon conducteur de la chaleur et un noyau central, caractérisé en ce que la virole est liée à une pièce de support cylindrique sous-jacente sur toute leur surface de contact par une liaison métallurgique sans fusion réalisée par soudage-diffusion.With these objectives in view, the invention relates to a cylinder for a continuous casting installation on one or between two such cylinders comprising an outer shell made of a material which is good conductor of heat and a central core, characterized in that the shell is linked to an underlying cylindrical support piece over their entire contact surface by a metallurgical bond without fusion produced by welding-diffusion.
Le noyau peut constituer lui-même la pièce de support, ou, préférentiellement, cette pièce de support est une pièce annulaire dont la surface externe est cylindrique, et qui comporte à l'intérieur des moyens de liaison mécanique au noyau.The core can itself constitute the support part, or, preferably, this support part is an annular part whose external surface is cylindrical, and which includes inside means for mechanical connection to the core.
La virole qui est en un matériau nécessairement bon conducteur de la chaleur, tel que du cuivre ou un alliage de cuivre, est généralement peu apte à subir d'importantes contraintes mécaniques. Grâce à l'invention, on réalise en fait une pièce composite qui présente à sa périphérie les caractéristiques requises sur le plan thermique, et à l'intérieur les caractéristiques mécaniques nécessaires pour résister aux différentes contraintes mécaniques qui s'exercent sur le cylindre lors de la coulée.The ferrule, which is made of a material which is necessarily a good conductor of heat, such as copper or a copper alloy, is generally not capable of undergoing significant mechanical stresses. Thanks to the invention, in fact a composite part is produced which has at its periphery the characteristics required thermally, and inside the mechanical characteristics necessary to resist the various mechanical stresses which are exerted on the cylinder during casting.
De plus les usinages nécessaires à la liaison de l'ensemble virole-pièce de support sur le noyau du cylindre sont plus facilement réalisables sur de l'acier ou fonte dont la pièce support peut par exemple être constituée.In addition, the machining operations necessary for the connection of the ferrule-support part assembly to the cylinder core are more easily achievable on steel or cast iron of which the support part can for example be made.
Enfin la quantité nécessaire de cuivre ou d'alliage cuivreux nécessaire pour la virole peut être réduite, ce qui réduit le coût du cylindre.Finally, the necessary quantity of copper or copper alloy necessary for the shell can be reduced, which reduces the cost of the cylinder.
Selon une disposition particulière le cylindre comporte à l'interface entre la virole et la pièce de support une fine couche d'un métal ou alliage apte à être assemblé par soudage diffusion d'une part avec le métal constitutif de la virole et d'autre part avec celui de la pièce de support.According to a particular arrangement, the cylinder comprises at the interface between the ferrule and the support piece a thin layer of a metal or alloy capable of being assembled by diffusion welding on the one hand with the metal constituting the ferrule and on the other share with that of the support piece.
Selon une variante des canaux de refroidissement sont forés dans l'épaisseur de la virole parallèlement à son axe, des canaux d'alimentation et de retour traversent l'interface virole-pièce de support et des tubes sont placés dans ces canaux d'alimentation et de retour au niveau de l'interface de manière à assurer une étanchéité entre ceux-ci et d'une part la virole et d'autre part la pièce de support.According to a variant, cooling channels are drilled in the thickness of the ferrule parallel to its axis, supply and return channels pass through the ferrule-support part interface and tubes are placed in these supply channels and back at the interface so as to provide a seal between them and on the one hand the ferrule and on the other hand the support part.
Selon une autre variante le cylindre comporte des rainures réalisées à l'interface virole-pièce de support, et des tubes sont placés dans ces rainures et liés de manière étanche à leurs extrémités avec d'une part la virole et d'autre part la pièce de support.According to another variant, the cylinder has grooves made at the ferrule-support part interface, and tubes are placed in these grooves and tightly connected at their ends with on the one hand the ferrule and on the other hand the support piece.
L'invention a aussi pour objet un procédé de fabrication d'un cylindre conforme à l'invention, caractérisé en ce que :
- on usine la virole et la pièce-support ;
- on place la virole autour de la pièce-support ;
- on réalise la liaison virole-pièce de support par soudage diffusion par compression isostatique à chaud.
- the ferrule and the support part are machined;
- the ferrule is placed around the support piece;
- the ferrule-support part connection is made by diffusion welding by hot isostatic compression.
Selon des dispositions particulières de ce procédé :
- préalablement à la réalisation de la liaison virole-pièce de support, on soude ces deux pièces sur les bords de leurs surfaces en contact ;
- l'usinage de la virole comporte la réalisation de rainures à la surface interne de celle-ci, et préalablement à la réalisation de la liaison virole-pièce de support, on place dans ces rainures des tubes qu'on lie de manière étanche à leurs extrémités d'une part à la virole et d'autre part à la pièce de support.
- prior to making the ferrule-support part connection, these two parts are welded to the edges of their contacting surfaces;
- the machining of the ferrule includes the production of grooves on the internal surface thereof, and prior to the production of the ferrule-support part connection, tubes are placed in these grooves which are tightly connected to their ends on the one hand to the ferrule and on the other hand to the support piece.
D'autres caractéristiques et avantages du cylindre selon l'invention et de son procédé de fabrication apparaîtront dans la description qui va suivre, faite en référence aux dessins annexés dans lesquels :
- la figure 1 est une vue demi-coupe axiale d'un cylindre conforme à l'invention ;
- la figure 2 est une vue de détail du bord de l'ensemble virole-pièce de support lors de sa réalisation, selon une première variante ;
- la figure 3 est une vue similaire dans une seconde variante ;
- la figure 4 est une vue partielle en coupe selon la ligne IV-IV de la figure 3.
- Figure 1 is an axial half-sectional view of a cylinder according to the invention;
- Figure 2 is a detail view of the edge of the ferrule-support piece assembly during its production, according to a first variant;
- Figure 3 is a similar view in a second variant;
- FIG. 4 is a partial sectional view along the line IV-IV of FIG. 3.
Le cylindre 1 représenté à la figure 1 comporte un noyau 2, une pièce de support annulaire 3 maintenue sur le noyau par deux brides annulaires 4 et des tirants représentés uniquement par leurs axes 5.The cylinder 1 shown in FIG. 1 comprises a
La virole externe 6 est assemblée sur la pièce de support 3 par son soudage-diffusion, cet assemblage étant réalisé préalablement par compression isostatique à chaud, qui conduit à l'obtention d'une pièce composite virole-pièce de support, qui sera appelée par la suite virole composite.The
Le soudage-diffusion par compression isostatique à chaud permet d'obtenir une liaison par diffusion à l'état solide. Cette technique d'assemblage nécessite une pression élevée et une température des pièces à assembler modérée qui n'atteint pas leur température de fusion comme c'est le cas dans le soudage classique. La pression élevée des deux pièces l'une sur l'autre conduit à un contact intime des surfaces en regard et à la réalisation d'une jonction métallique sans pores par diffusion réciproque des métaux à travers l'interface.Diffusion welding by hot isostatic compression makes it possible to obtain a diffusion bond in the solid state. This assembly technique requires high pressure and a moderate temperature of the parts to be assembled which does not reach their melting temperature as is the case in conventional welding. The high pressure of the two parts on each other leads to intimate contact of the facing surfaces and to the production of a metallic junction without pores by reciprocal diffusion of the metals through the interface.
L'utilisation de cette technique pour la réalisation de ladite virole composite permet d'obtenir une liaison résistante de la virole 6 sur la pièce de support 3. Cette pièce 3 peut être alors réalisée en un matériau moins coûteux que celui de la virole 6, et qui, de plus, peut être plus facilement usiné.The use of this technique for the production of said composite ferrule makes it possible to obtain a resistant connection of the
La virole composite (3,6) peut comporter à l'interface entre la virole 6 et la pièce support 3 une fine couche d'un métal ou alliage, par exemple du nickel ou un alliage fer-nickel à 42 % de nickel, qui est apte à être assemblé par compression isostatique à chaud avec l'un et l'autre des métaux constitutifs de la virole et de la pièce de support, ce qui permet par exemple de réaliser celles-ci en des métaux difficilement assemblables directement par cette technique.The composite ferrule (3,6) may comprise at the interface between the
La virole 6 est réalisée en un matériau présentant une bonne conductibilité thermique et des caractéristiques de résistance mécanique suffisantes à des températures relativement élevées, supérieures à 400°C, tel que par exemple un alliage Cu-Cr-Zr de préférence à l'état hypertrempé.The
La pièce de support est un matériau présentant de bonnes caractéristiques mécaniques à la température ambiante, facilement usinable, et dont le coefficient de dilatation est préférentiellement égal ou supérieur à celui du matériau de la virole, tel que par exemple de la fonte austénitique GS à 18 % de Ni ou de l'acier inoxydable austénitique type 304.The support part is a material having good mechanical characteristics at room temperature, easily machinable, and whose coefficient of expansion is preferably equal to or greater than that of the shell material, such as for example austenitic cast iron GS to 18 % Ni or type 304 austenitic stainless steel.
Le noyau est préférentiellement en acier ou acier inoxydable.The core is preferably made of steel or stainless steel.
De manière générale, la fabrication de la virole composite comporte les étapes suivantes :
- les ébauches de la virole et de la pièce de support sont réalisées classiquement par exemple par moulage ;
- les surfaces destinées à être soudées sont usinées de manière que la virole puisse être mise en place autour de la pièce-support avec un jeu réduit. Avant assemblage, les surfaces sont préparées, cette préparation pouvant consister en un nettoyage, décapage, ou traitement mécanique ou chimique, par exemple nickelage électrolytique sur une épaisseur de 50 à 100 µm ;
- une fois assemblées, une soudure est réalisée sur les bords de l'interface 9 entre la
virole 6 et la pièce desupport 3 pour assurer l'étanchéité de l'interface ; - les deux pièces ainsi assemblées sont soumises alors à une compression isostatique à chaud, par exemple à 900°C, sous une pression de 100 Mpa pendant une heure, pour réaliser la liaison par soudage-diffusion.
- the blanks of the ferrule and of the support part are produced conventionally, for example by molding;
- the surfaces intended to be welded are machined so that the ferrule can be placed around the support piece with reduced play. Before assembly, the surfaces are prepared, this preparation possibly consisting of cleaning, pickling, or mechanical or chemical treatment, for example electrolytic nickel-plating over a thickness of 50 to 100 μm;
- once assembled, a weld is made on the edges of the
interface 9 between theferrule 6 and thesupport part 3 to seal the interface; - the two parts thus assembled are then subjected to hot isostatic compression, for example at 900 ° C, under a pressure of 100 Mpa for one hour, to make the connection by welding-diffusion.
La virole composite ainsi obtenue peut ensuite être usinée, ou subir les traitements thermiques spécifiques nécessaires à l'obtention des caractéristiques métallurgiques requises pour son utilisation.The composite shell thus obtained can then be machined, or undergo the specific heat treatments necessary to obtain the metallurgical characteristics required for its use.
On notera ici tout l'intérêt du choix des matériaux indiqués précédemment, c'est-à-dire l'alliage Cu-Cr-Zr pour la virole et l'acier inoxydable E304 pour le support. En effet les coefficients de dilatation de ces matériaux sont proches l'un de l'autre, celui de l'acier inoxydable E304 étant toutefois légèrement supérieur à celui de l'alliage Cu-Cr-Zr. Il en résulte que dans la phase de refroidissement des traitements thermiques appliqués à l'ensemble virole-support, le support tend à se rétracter légèrement plus que la virole, ce qui assure, après traitements thermiques, une mise en compression de la virole. La virole ainsi précontrainte a une meilleure résistance à la fissuration.Note here the advantage of the choice of materials indicated above, that is to say the alloy Cu-Cr-Zr for the shell and the stainless steel E304 for the support. In fact, the coefficients of expansion of these materials are close to each other, that of stainless steel E304 however being slightly higher than that of the alloy Cu-Cr-Zr. As a result, in the cooling phase of the heat treatments applied to the ferrule-support assembly, the support tends to retract slightly more than the ferrule, which ensures, after thermal treatments, compression of the ferrule. The thus prestressed ferrule has better resistance to cracking.
Il peut être avantageux de réaliser certains usinages de la virole 6 préalablement à son assemblage sur la pièce support 3.It may be advantageous to carry out certain machining of the
Dans le cas représenté à la figure 2, des canaux de refroidissement 7 sont forés axialement dans la virole, ainsi que des perçages 10 destinés à permettre l'alimentation ou le retour d'un fluide de refroidissement. Des perçages 10′ correspondants sont réalisés dans la pièce de support 3. Dans ce cas, après mise en place de la virole autour de la pièce- support, des tubes 11 sont introduits dans les perçage 10 et 10′ de manière à recouvrir l'interface 9 et assurer l'étanchéité de celui-ci, cette étanchéité étant par ailleurs assurée sur les bords de la virole par les soudures 12. Les tubes 11 permettent donc d'une part d'assurer l'étanchéité de l'interface nécessaire lors de l'opération de compression isostatique à chaud, et d'autre part d'équilibrer la pression à l'intérieur des canaux de refroidissement 7 pour éviter le risque d'une déformation de ceux-ci du fait des hautes pressions appliquées à la périphérie de la virole.In the case shown in FIG. 2,
Dans le cas représenté aux figures 3 et 4, des canaux de refroidissement 7 sont situés à l'interface virole-pièce de support. Des rainures 13 sont usinées à l'intérieur de la virole 6 avant son assemblage sur la pièce de support 3. On notera qu'il est plus facile d'usiner de telles rainures que de forer des orifices sur une grande longueur. Des tubes 14 sont placés dans ces rainures et, après mise en place de la virole sur la pièce support, soudés à leurs extrémités 15. L'étanchéité de l'interface 9 est ainsi assurée, de même que l'équilibrage en pression de l'intérieur des tubes 14.In the case shown in Figures 3 and 4,
L'invention n'est pas limitée aux modes de réalisation décrits ci-dessus à titre d'exemples.The invention is not limited to the embodiments described above by way of examples.
En particulier la compaction isostatique à chaud peut être réalisée par la technique consistant à enrober les pièces assemblées par un container étanche à l'extérieur duquel la pression est appliquée.In particular, hot isostatic compaction can be carried out by the technique consisting in coating the assembled parts with a sealed container outside of which the pressure is applied.
Claims (12)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9015535 | 1990-12-07 | ||
| FR9015535A FR2670144B1 (en) | 1990-12-07 | 1990-12-07 | CYLINDER FOR CONTINUOUS CASTING ON ONE OR BETWEEN TWO CYLINDERS, AND ITS MANUFACTURING METHOD. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0490800A1 true EP0490800A1 (en) | 1992-06-17 |
| EP0490800B1 EP0490800B1 (en) | 1995-10-04 |
Family
ID=9403142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91470038A Expired - Lifetime EP0490800B1 (en) | 1990-12-07 | 1991-12-04 | Cylinder for single-roll or twin-roll continuous casting. |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0490800B1 (en) |
| AT (1) | ATE128656T1 (en) |
| DE (2) | DE69113588T2 (en) |
| DK (1) | DK0490800T3 (en) |
| ES (1) | ES2079051T3 (en) |
| FR (1) | FR2670144B1 (en) |
| GR (1) | GR3017932T3 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0687515A1 (en) | 1994-06-13 | 1995-12-20 | Mitsubishi Jukogyo Kabushiki Kaisha | Cooling drum for a continuous casting system and method for manufacturing the same |
| FR2744942A1 (en) * | 1996-02-16 | 1997-08-22 | Ishikawajima Harima Heavy Ind | CASTING ROLLS FOR THE CASTING OF A METAL STRIP |
| EP1122004A1 (en) * | 2000-02-01 | 2001-08-08 | Officine Meccaniche Bruno Presezzi S.r.l. | Continuous casting roll |
| US6478214B1 (en) | 1998-06-23 | 2002-11-12 | Commissariat A L'energie Atomique | Method for assembling by diffusion welding a martensite stainless steel and a copper alloy and resulting bimetal element |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0680796A1 (en) * | 1994-05-02 | 1995-11-08 | Siemens Aktiengesellschaft | Roll for a continuous casting installation |
| DE10311151A1 (en) * | 2003-03-14 | 2004-09-23 | Km Europa Metal Ag | Process for producing a hollow cylindrical casting roll and casting roll |
| CN1781623B (en) * | 2004-11-30 | 2012-01-11 | 宝山钢铁股份有限公司 | Method for producing continuous casting crystallizing roll |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2367557A1 (en) * | 1976-10-15 | 1978-05-12 | Usinor | GUIDANCE ROLLERS IMPROVEMENTS, ESPECIALLY FOR CONTINUOUS CASTING INSTALLATION |
| DE3910603A1 (en) * | 1989-04-01 | 1990-10-04 | Wahl Verschleiss Tech | Method for the production of a composite article |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6059076B2 (en) * | 1981-04-20 | 1985-12-23 | 株式会社日立製作所 | Manufacturing method of composite roll |
| JPS5982149A (en) * | 1982-11-02 | 1984-05-12 | Nippon Steel Corp | Cooling roll for producing ultraquickly cooled metal |
| JPS6030562A (en) * | 1983-07-30 | 1985-02-16 | Kuroki Kogyosho:Kk | Production of sleeve for hot roll |
| JPS6030563A (en) * | 1983-07-30 | 1985-02-16 | Kuroki Kogyosho:Kk | Production of hot roll |
-
1990
- 1990-12-07 FR FR9015535A patent/FR2670144B1/en not_active Expired - Fee Related
-
1991
- 1991-12-04 DK DK91470038.0T patent/DK0490800T3/en active
- 1991-12-04 AT AT91470038T patent/ATE128656T1/en not_active IP Right Cessation
- 1991-12-04 DE DE69113588T patent/DE69113588T2/en not_active Expired - Fee Related
- 1991-12-04 ES ES91470038T patent/ES2079051T3/en not_active Expired - Lifetime
- 1991-12-04 EP EP91470038A patent/EP0490800B1/en not_active Expired - Lifetime
- 1991-12-06 DE DE4140319A patent/DE4140319A1/en not_active Withdrawn
-
1995
- 1995-11-01 GR GR950403038T patent/GR3017932T3/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2367557A1 (en) * | 1976-10-15 | 1978-05-12 | Usinor | GUIDANCE ROLLERS IMPROVEMENTS, ESPECIALLY FOR CONTINUOUS CASTING INSTALLATION |
| DE3910603A1 (en) * | 1989-04-01 | 1990-10-04 | Wahl Verschleiss Tech | Method for the production of a composite article |
Non-Patent Citations (3)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 7, no. 20 (M-188)26 Janvier 1983 & JP-A-57 175 090 ( HITACHI SEISAKUSHO K.K. ) 27 Octobre 1982 * |
| PATENT ABSTRACTS OF JAPAN vol. 8, no. 191 (M-322)(1628) 4 Septembre 1984 & JP-A-59 082 149 ( SHIN NIPPON SEITETSU K.K. ) 12 Mai 1984 * |
| PATENT ABSTRACTS OF JAPAN vol. 9, no. 155 (M-392)(1878) 29 Juin 1985 & JP-A-60 030 562 ( KUROKI KOGYOSHO K.K. ) 16 Février 1985 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0687515A1 (en) | 1994-06-13 | 1995-12-20 | Mitsubishi Jukogyo Kabushiki Kaisha | Cooling drum for a continuous casting system and method for manufacturing the same |
| FR2744942A1 (en) * | 1996-02-16 | 1997-08-22 | Ishikawajima Harima Heavy Ind | CASTING ROLLS FOR THE CASTING OF A METAL STRIP |
| US6478214B1 (en) | 1998-06-23 | 2002-11-12 | Commissariat A L'energie Atomique | Method for assembling by diffusion welding a martensite stainless steel and a copper alloy and resulting bimetal element |
| EP1122004A1 (en) * | 2000-02-01 | 2001-08-08 | Officine Meccaniche Bruno Presezzi S.r.l. | Continuous casting roll |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE128656T1 (en) | 1995-10-15 |
| DE4140319A1 (en) | 1992-06-11 |
| FR2670144B1 (en) | 1995-01-06 |
| FR2670144A1 (en) | 1992-06-12 |
| DE69113588T2 (en) | 1996-03-21 |
| DE69113588D1 (en) | 1995-11-09 |
| EP0490800B1 (en) | 1995-10-04 |
| ES2079051T3 (en) | 1996-01-01 |
| DK0490800T3 (en) | 1996-02-12 |
| GR3017932T3 (en) | 1996-02-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0067746A1 (en) | Abradable rub strip and method of making the same | |
| EP0167418B1 (en) | Double-walled heat-transfer tube and manufacturing method for this tube | |
| FR2536119A1 (en) | ASSEMBLY OF A ROTARY CERAMIC ELEMENT WITH A METALLIC ROTATING ELEMENT FOR TURBO-MACHINES, IN PARTICULAR FOR A GAS TURBINE PROPELLER AND DEVICE FOR IMPLEMENTING THE SAME | |
| EP0490800B1 (en) | Cylinder for single-roll or twin-roll continuous casting. | |
| FR2605908A1 (en) | ROLLER ROLLER WITH NO PILGRIM FOR TUBE MANUFACTURE | |
| FR2942515A1 (en) | ASSEMBLY DEVICE. | |
| FR2464123A1 (en) | METHOD FOR MANUFACTURING A LIQUID COOLED GAS TURBINE BLADE | |
| FR2733581A1 (en) | COMBUSTION ENCLOSURE WITH COOLING BY TRANSPIRATION | |
| CA1326115C (en) | Rarefield or controlled atmosphere furnace soldering process | |
| EP0166286B1 (en) | Seal for a valve with a rotating closure member, and its manufacturing process | |
| FR2504044A1 (en) | METHOD FOR MANUFACTURING A COMPOSITE TUBULAR FITTING TO SUPPORT NON-WELDING METAL TUBES BETWEEN THEM AND A COUPLING THUS OBTAINED | |
| EP3469206B1 (en) | Rocket motor combustion chamber having variable-composition fins | |
| EP0650789B1 (en) | Castingroll for continuous casting with one or two rolls | |
| FR2588788A1 (en) | CONTINUOUSLY MOVING BRAZING PROCESS FOR WELDING A SLEEVE IN A TUBE | |
| EP0421908B1 (en) | Cylinder for continuous casting machine producing thin metal strips | |
| CA2198566C (en) | Casting roll for continuous casting on one or between two cylinders | |
| EP0605585B1 (en) | Method for making a composite part with an antiabrasion surface, and parts obtained by such method | |
| FR2524110A1 (en) | METHOD OF MANUFACTURING A TUBE WITH CONDUITS PLACED IN ITS WALL | |
| FR2666756A1 (en) | CYLINDER FOR THE CONTINUOUS CASTING OF METAL STRIPS BETWEEN TWO CYLINDERS, PARTICULARLY STEEL, AND METHOD FOR MANUFACTURING THE SAME. | |
| FR2541152A1 (en) | Method for producing composite metallic bodies | |
| FR2556070A1 (en) | Method for manufacturing a mechanical sealing gasket for a rotary machine | |
| EP4166881B1 (en) | Module for manufacturing a heat pipe with a capillary pump with re-entrant grooves | |
| FR2565141A1 (en) | Device for the guiding and the electrical supplying of a metal filler wire for arc welding, and its method of manufacture | |
| FR3147318A1 (en) | Turbine ring assembly with sealing sheet | |
| FI97606C (en) | Roll for performing continuous casting on a roll or between two rolls |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
| 17P | Request for examination filed |
Effective date: 19921204 |
|
| 17Q | First examination report despatched |
Effective date: 19931013 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
| REF | Corresponds to: |
Ref document number: 128656 Country of ref document: AT Date of ref document: 19951015 Kind code of ref document: T |
|
| ITF | It: translation for a ep patent filed | ||
| RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: USINOR SACILOR Owner name: THYSSEN STAHL AKTIENGESELLSCHAFT |
|
| REF | Corresponds to: |
Ref document number: 69113588 Country of ref document: DE Date of ref document: 19951109 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PUE Owner name: USINOR SACILOR;THYSSEN EDELSTAHLWERKE AG;THYSSEN S |
|
| NLT2 | Nl: modifications (of names), taken from the european patent patent bulletin |
Owner name: USINOR SACILOR EN THYSSEN STAHL AKTIENGESELLSCHAFT |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2079051 Country of ref document: ES Kind code of ref document: T3 |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19951216 |
|
| REG | Reference to a national code |
Ref country code: GR Ref legal event code: FG4A Free format text: 3017932 |
|
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
| NLXE | Nl: other communications concerning ep-patents (part 3 heading xe) |
Free format text: PAT.BUL.02/96 PAGE 218:CORR.:USINOR SACILOR AND THYSSEN STAHL AKTIENGESELLSCHAFT |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20081203 Year of fee payment: 18 Ref country code: LU Payment date: 20081217 Year of fee payment: 18 Ref country code: CH Payment date: 20081216 Year of fee payment: 18 Ref country code: DK Payment date: 20081212 Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20081211 Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20081205 Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20081212 Year of fee payment: 18 Ref country code: ES Payment date: 20090120 Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20081127 Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20081203 Year of fee payment: 18 Ref country code: GR Payment date: 20081113 Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20090119 Year of fee payment: 18 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20081229 Year of fee payment: 18 |
|
| BERE | Be: lapsed |
Owner name: *USINOR SACILOR Effective date: 20091231 Owner name: *THYSSEN EDELSTAHLWERKE A.G. Effective date: 20091231 Owner name: *THYSSEN STAHL A.G. Effective date: 20091231 |
|
| REG | Reference to a national code |
Ref country code: NL Ref legal event code: V1 Effective date: 20100701 |
|
| EUG | Se: european patent has lapsed | ||
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: EBP |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20091204 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091204 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20100831 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091231 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091231 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091231 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091231 Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100701 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100701 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091204 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100104 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20110308 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091204 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091204 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091205 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110307 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20091205 |