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EP0421908B1 - Cylinder for continuous casting machine producing thin metal strips - Google Patents

Cylinder for continuous casting machine producing thin metal strips Download PDF

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Publication number
EP0421908B1
EP0421908B1 EP90470053A EP90470053A EP0421908B1 EP 0421908 B1 EP0421908 B1 EP 0421908B1 EP 90470053 A EP90470053 A EP 90470053A EP 90470053 A EP90470053 A EP 90470053A EP 0421908 B1 EP0421908 B1 EP 0421908B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
sleeve
ferrule
continuous casting
materials
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90470053A
Other languages
German (de)
French (fr)
Other versions
EP0421908A1 (en
Inventor
Laurent Sosin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
USINOR SA
Original Assignee
USINOR Sacilor SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9386004&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0421908(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by USINOR Sacilor SA filed Critical USINOR Sacilor SA
Priority to AT90470053T priority Critical patent/ATE102098T1/en
Publication of EP0421908A1 publication Critical patent/EP0421908A1/en
Application granted granted Critical
Publication of EP0421908B1 publication Critical patent/EP0421908B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

Definitions

  • the subject of the present invention is a cylinder for a device for direct continuous casting of thin strips of liquid metal between two cylinders, or on a single cylinder, according to the preamble of claim 1.
  • these cylinders comprise a cylindrical core coated with a ferrule generally made of copper and are cooled by circulation of a cooling fluid, such as water, in channels formed between the ferrule and the core or in the ferrule.
  • a cooling fluid such as water
  • the object of the invention is to produce cylinders which make it possible to eliminate this drawback and therefore to obtain cast products with a profile of satisfactory thickness.
  • the cylinder comprises, around the first ferrule, a second ferrule forming with the first two superimposed cylindrical layers, and chosen from materials such that the internal ferrule has a higher coefficient of expansion than that of the external ferrule , in contact with the liquid metal.
  • the expansion coefficients and therefore the corresponding materials are chosen so that the differential expansion between the two materials compensates for the tendency that the double ferrule thus produced would have to bulge, in particular at the center of the centers of the cylinders.
  • the internal ferrule can for example be made of copper while the external ferrule is made of steel, these two ferrules being welded to one another.
  • Figure 1 is a perspective view of a cylinder having a double ferrule according to the invention and intended for a device for continuous casting of thin strips of metal.
  • Figure 2 is a partial axial sectional view of the cylinder of Fig.1.
  • the cylinder 1 shown in the drawings is intended for a device for the manufacture of thin metal strips by direct continuous casting of liquid metal such as steel, between two similar cylinders 1. Such a device is well known in itself and has therefore not been shown.
  • the cylinder 1, of axis XX consists of an internal cylindrical core 2 and two annular rings 3, 4 superimposed, which surround the internal core 2, in which are formed cooling channels 5 where can circulate water.
  • the two superimposed layers 3 and 4 are chosen from materials such that the internal shell 3 has a higher coefficient of thermal expansion than that of the external shell 4 in contact with the liquid metal.
  • the two ferrules 3 and 4 are linked to each other, for example by welding, by loading one of the materials on the other, or by electrolytic deposition.
  • the internal ferrule 3 is made of copper and the external ferrule 4 made of steel, copper having in fact a coefficient of expansion greater than that of steel.
  • the thicknesses of the two layers 3 and 4 are adjusted as a function of the expansion coefficients of the materials chosen.
  • the differential expansion between the two materials of layers 3 and 4 compensates for the tendency of the double ferrule to bulge, especially at the center distance of the two cylinders of the device.
  • the internal ferrule 3 is preferably made of copper and has a thickness of 5 to 30mm.
  • the outer shell can be made of steel, nickel or chrome, and have a thickness of 1 to 10mm.
  • the crown of the cylinder is 0.3mm, whereas if the shell is entirely in copper, the bulge is about 1mm.
  • coating a material having a lower coefficient of expansion and better thermal conductivity, such as chromium.
  • the invention is not limited to an arrangement of the cooling channels 5 under the double ferrule (3, 4), but that these channels can be drilled in the internal ferrule 3.
  • the thickness of the copper ferrule mentioned above corresponds to the case where the cooling channels are provided under this ferrule.
  • the thickness considered is the radial distance between these channels and the internal ferrule-external ferrule interface, because in this case, the thickness of internal ferrule situated between the channels and the core is kept at low temperature and has little influence on the effect of differential expansion.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Coating With Molten Metal (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Metal Rolling (AREA)
  • Indole Compounds (AREA)
  • Metal Extraction Processes (AREA)
  • Glass Compositions (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

This cylinder (1) is covered by a combination of two metal sleeves (3, 4) forming two superposed cylindrical layers and chosen from materials such that the inner sleeve (3) has a coefficient of expansion greater than that of the outer sleeve (4) in contact with the molten metal; the differential thermal expansion experienced by the two sleeves (3, 4) during casting of the molten metal prevents the cylinder (1) from bulging and, consequently, guarantees the production of cast products having a satisfactory thickness profile. Application to the continuous casting of molten steel. <IMAGE>

Description

La présente invention a pour objet un cylindre pour dispositif de coulée continue directe de bandes minces de métal liquide entre deux cylindres, ou sur un seul cylindre, selon le préambule de la revendication 1.The subject of the present invention is a cylinder for a device for direct continuous casting of thin strips of liquid metal between two cylinders, or on a single cylinder, according to the preamble of claim 1.

Comme on le sait, ces cylindres comportent un coeur cylindrique revêtu d'une virole généralement en cuivre et sont refroidis par circulation d'un fluide de refroidissement, tel que l'eau, dans des canaux ménagés entre la virole et le coeur ou dans la virole. Or, on constate que les cylindres ainsi réalisés subissent en cours de coulée un bombage vers l'extérieur, de sorte que les produits coulés entre deux cylindres ainsi bombés présentent un profil en "os de chien". Leur épaisseur aux extrémités étant ainsi supérieure à leur épaisseur dans la zone médiane, de tels produits ne sont donc pas satisfaisants.As is known, these cylinders comprise a cylindrical core coated with a ferrule generally made of copper and are cooled by circulation of a cooling fluid, such as water, in channels formed between the ferrule and the core or in the ferrule. However, it can be seen that the cylinders thus produced undergo bending outward during casting, so that the products cast between two cylinders thus domed have a "dog bone" profile. Their thickness at the ends thus being greater than their thickness in the middle zone, such products are therefore not satisfactory.

Dans le cas de la coulée sur un seul cylindre, le bombage de celui-ci rend irrégulier le jeu entre le dispositif d'alimentation en métal liquide et le cylindre. Ce dernier peut de ce fait venir au contact du réfractaire d'alimentation et le détériorer.In the case of casting on a single cylinder, the bending thereof makes the clearance between the liquid metal supply device and the cylinder irregular. The latter can therefore come into contact with the supply refractory and deteriorate it.

L'invention a pour but de réaliser des cylindres permettant d'éliminer cet inconvénient et par conséquent d'obtenir des produits coulés de profil d'épaisseur satisfaisant.The object of the invention is to produce cylinders which make it possible to eliminate this drawback and therefore to obtain cast products with a profile of satisfactory thickness.

Suivant l'invention, le cylindre comporte, autour de la première virole, une deuxième virole formant avec la première deux couches cylindriques superposées, et choisies en des matériaux tels que la virole interne a un coefficient de dilatation plus élevé que celui de la virole externe, en contact avec le métal liquide.According to the invention, the cylinder comprises, around the first ferrule, a second ferrule forming with the first two superimposed cylindrical layers, and chosen from materials such that the internal ferrule has a higher coefficient of expansion than that of the external ferrule , in contact with the liquid metal.

Les coefficients de dilatation et donc les matériaux correspondants sont choisis pour que la dilatation différentielle entre les deux matériaux compense la tendance qu'aurait la double virole ainsi réalisée à se bomber, en particulier au niveau de l'entraxe des cylindres.The expansion coefficients and therefore the corresponding materials are chosen so that the differential expansion between the two materials compensates for the tendency that the double ferrule thus produced would have to bulge, in particular at the center of the centers of the cylinders.

La virole interne peut être par exemple en cuivre tandis que la virole externe est en acier, ces deux viroles étant soudées l'une à l'autre.The internal ferrule can for example be made of copper while the external ferrule is made of steel, these two ferrules being welded to one another.

D'autres particularités et avantages de l'invention apparaitront au cours de la description qui va suivre, faite en référence aux dessins annexés qui en illustrent une forme de réalisation à titre d'exemple non limitatif.Other features and advantages of the invention will appear during the description which follows, given with reference to the accompanying drawings which illustrate an embodiment thereof by way of nonlimiting example.

La figure 1 est une vue en perspective d'un cylindre comportant une double virole selon l'invention et destiné à un dispositif de coulée continue de bandes minces de métal.Figure 1 is a perspective view of a cylinder having a double ferrule according to the invention and intended for a device for continuous casting of thin strips of metal.

La figure 2 est une vue en coupe partielle axiale du cylindre de la Fig.1.Figure 2 is a partial axial sectional view of the cylinder of Fig.1.

Le cylindre 1 représenté aux dessins est destiné à un dispositif pour la fabrication de bandes métalliques minces par coulée continue directe de métal liquide tel que de l'acier, entre deux cylindres 1 similaires. Un tel dispositif est bien connu en soi et n'a donc pas été représenté.The cylinder 1 shown in the drawings is intended for a device for the manufacture of thin metal strips by direct continuous casting of liquid metal such as steel, between two similar cylinders 1. Such a device is well known in itself and has therefore not been shown.

Le cylindre 1, d'axe XX, est constitué d'un coeur interne 2 cylindrique et de deux viroles annulaires 3, 4 superposées, qui entourent le coeur interne 2, dans lequel sont ménagés des canaux 5 de refroidissement où peut circuler de l'eau. Les deux couches superposées 3 et 4 sont choisies en des matériaux tels que la virole interne 3 a un coefficient de dilatation thermique plus élevé que celui de la virole externe 4 en contact avec le métal liquide.The cylinder 1, of axis XX, consists of an internal cylindrical core 2 and two annular rings 3, 4 superimposed, which surround the internal core 2, in which are formed cooling channels 5 where can circulate water. The two superimposed layers 3 and 4 are chosen from materials such that the internal shell 3 has a higher coefficient of thermal expansion than that of the external shell 4 in contact with the liquid metal.

Les deux viroles 3 et 4 sont liées l'une à l'autre, par exemple par soudage, par chargement de l'un des matériaux sur l'autre, ou par dépôt électrolytique. A titre d'exemple non limitatif, la virole interne 3 est en cuivre et la virole externe 4 en acier, le cuivre ayant en effet un coefficient de dilatation supérieur à celui de l'acier.The two ferrules 3 and 4 are linked to each other, for example by welding, by loading one of the materials on the other, or by electrolytic deposition. By way of nonlimiting example, the internal ferrule 3 is made of copper and the external ferrule 4 made of steel, copper having in fact a coefficient of expansion greater than that of steel.

Les épaisseurs des deux couches 3 et 4 sont ajustées en fonction des coefficients de dilatation des matériaux choisis.The thicknesses of the two layers 3 and 4 are adjusted as a function of the expansion coefficients of the materials chosen.

Ainsi, lorsque la double virole 3, 4 est soumise au fort gradient de température rencontré lors du contact de la couche externe 4 avec le métal liquide, la dilatation différentielle entre les deux matériaux des couches 3 et 4 compense la tendance de la double virole à se bomber, notamment au niveau de l'entraxe des deux cylindres du dispositif.Thus, when the double ferrule 3, 4 is subjected to the strong temperature gradient encountered during the contact of the outer layer 4 with the liquid metal, the differential expansion between the two materials of layers 3 and 4 compensates for the tendency of the double ferrule to bulge, especially at the center distance of the two cylinders of the device.

La virole interne 3 est de préférence en cuivre et a une épaisseur de 5 à 30mm. La virole externe peut être en acier, nickel ou chrome, et avoir une épaisseur de 1 à 10mm.The internal ferrule 3 is preferably made of copper and has a thickness of 5 to 30mm. The outer shell can be made of steel, nickel or chrome, and have a thickness of 1 to 10mm.

A titre d'exemple :

  • cylindre : diamètre 1500mm, largeur : 800mm
  • virole interne : cuivre, épaisseur 15mm
  • virole externe : acier ou nickel ; épaisseur 2mm
  • les viroles sont liées l'une à l'autre sur toute la surface (virole externe constituée par un revêtement déposé sur la virole interne)
  • température de l'acier coulé : 1450°
  • température à la paroi interne de la virole interne: 60°C (sensiblement égale à la température de l'eau de refroidissement).
For exemple :
  • cylinder: diameter 1500mm, width: 800mm
  • internal ferrule: copper, thickness 15mm
  • outer shell: steel or nickel; thickness 2mm
  • the ferrules are linked to each other over the entire surface (external ferrule constituted by a coating deposited on the internal ferrule)
  • temperature of the cast steel: 1450 °
  • temperature at the inner wall of the inner shell: 60 ° C (substantially equal to the temperature of the cooling water).

résultat : le bombé du cylindre est de 0,3mm, alors que si la virole est entièrement en cuivre, le bombé est d'environ 1mm. result : the crown of the cylinder is 0.3mm, whereas if the shell is entirely in copper, the bulge is about 1mm.

On pourrait encore réduire le bombé restant en choisissant comme revêtement (virole externe) un matériau ayant un coefficient de dilatation plus faible et une meilleure conductibilité thermique, tel que le chrome.We could further reduce the remaining bulge by choosing as coating (outer shell) a material having a lower coefficient of expansion and better thermal conductivity, such as chromium.

Enfin, il convient de préciser que l'invention n'est pas limitée à une disposition des canaux de refroidissement 5 sous la virole double (3, 4), mais que ces canaux peuvent être forés dans la virole interne 3.Finally, it should be noted that the invention is not limited to an arrangement of the cooling channels 5 under the double ferrule (3, 4), but that these channels can be drilled in the internal ferrule 3.

Il convient aussi de préciser que l'épaisseur de la virole en cuivre mentionnée ci-dessus correspond au cas où les canaux de refroidissement sont ménagés sous cette virole. Dans le cas où les canaux sont ménagés dans la virole interne, l'épaisseur considérée est la distance radiale entre ces canaux et l'interface virole interne-virole externe, car dans ce cas, l'épaisseur de virole interne située entre les canaux et le coeur est maintenue à basse température et n'influence que peu l'effet de dilatation différentielle.It should also be noted that the thickness of the copper ferrule mentioned above corresponds to the case where the cooling channels are provided under this ferrule. In the case where the channels are formed in the internal ferrule, the thickness considered is the radial distance between these channels and the internal ferrule-external ferrule interface, because in this case, the thickness of internal ferrule situated between the channels and the core is kept at low temperature and has little influence on the effect of differential expansion.

Claims (3)

  1. Cylinder (1) for a machine for direct continuous casting of thin strips of liquid metal between two cylinders (1), or on a single cylinder, including a cylindrical inner core (2) covered with a first sleeve (3), and cooling channels provided between the sleeve (3) and the core or in the said sleeve, characterized in that it comprises, around the first sleeve, a second sleeve (4) forming, with the said first sleeve, two superposed cylindrical layers chosen from materials such that the inner sleeve (3) has a coefficient of expansion which is greater than that of the outer sleeve (4) in contact with the liquid metal.
  2. Cylinder according to Claim 1, characterized in that the two sleeves (3, 4) are linked to each other, for example by welding, by charging of one of the materials on the other, or by electrolytic deposition.
  3. Cylinder according to one of Claims 1 and 2, characterized in that the inner sleeve (3) is made from copper and the outer sleeve (4) is made from steel, nickel or chromium.
EP90470053A 1989-10-02 1990-09-21 Cylinder for continuous casting machine producing thin metal strips Expired - Lifetime EP0421908B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90470053T ATE102098T1 (en) 1989-10-02 1990-09-21 CYLINDER FOR CONTINUOUS CASTING DEVICE FOR THE PRODUCTION OF THIN METAL STRIP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR898912855A FR2652525B1 (en) 1989-10-02 1989-10-02 CYLINDER FOR A DEVICE FOR DIRECT CONTINUOUS CASTING OF THIN STRIPS OF LIQUID METAL.
FR8912855 1989-10-02

Publications (2)

Publication Number Publication Date
EP0421908A1 EP0421908A1 (en) 1991-04-10
EP0421908B1 true EP0421908B1 (en) 1994-03-02

Family

ID=9386004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90470053A Expired - Lifetime EP0421908B1 (en) 1989-10-02 1990-09-21 Cylinder for continuous casting machine producing thin metal strips

Country Status (22)

Country Link
EP (1) EP0421908B1 (en)
JP (1) JP3262560B2 (en)
KR (1) KR0169721B1 (en)
CN (1) CN1034480C (en)
AT (1) ATE102098T1 (en)
AU (1) AU634818B2 (en)
BR (1) BR9004911A (en)
CA (1) CA2026244A1 (en)
CS (1) CS275363B2 (en)
DD (1) DD298216A5 (en)
DE (1) DE69007001T2 (en)
DK (1) DK0421908T3 (en)
ES (1) ES2050991T3 (en)
FI (1) FI91134C (en)
FR (1) FR2652525B1 (en)
HU (1) HU208931B (en)
IE (1) IE903457A1 (en)
NO (1) NO904263L (en)
PL (1) PL164353B1 (en)
PT (1) PT95480A (en)
YU (1) YU185390A (en)
ZA (1) ZA907828B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU659364B1 (en) * 1994-06-21 1995-05-11 Mitsubishi Jukogyo Kabushiki Kaisha Cooling drum for a continuous casting system and method for manufacturing the same
WO1998052706A1 (en) * 1997-05-23 1998-11-26 Voest-Alpine Industrieanlagenbau Gmbh Casting cylinder for thin-band continuous casting installation

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69425960T2 (en) 1994-06-13 2001-03-22 Mitsubishi Jukogyo K.K., Tokio/Tokyo Cooling roller for continuous casting and its production
US5598633A (en) * 1994-07-12 1997-02-04 Norandal Usa, Inc. Method of manufacturing a caster roll core and shell assembly
DE10134074C1 (en) * 2001-07-13 2003-01-23 Thyssenkrupp Nirosta Gmbh Casting roller used for casting molten metal, especially molten steel, comprises a metallic rolling body having a metallic layer which is harder than the material of the rolling body
EP2687303A1 (en) * 2012-07-20 2014-01-22 SMS Concast AG Roll arrangement for a continuous casting apparatus
CN103611898B (en) * 2013-12-10 2016-08-10 青岛云路先进材料技术有限公司 Copper sheathing manufacture method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1844062A (en) * 1930-05-27 1932-02-09 Pittsburgh Plate Glass Co Fluid cooled roll
FR1290938A (en) * 1961-03-07 1962-04-20 Saint Gobain Rolls for laminating glass or other thermoplastic materials
FR2367557A1 (en) * 1976-10-15 1978-05-12 Usinor GUIDANCE ROLLERS IMPROVEMENTS, ESPECIALLY FOR CONTINUOUS CASTING INSTALLATION
FR2467030A1 (en) * 1979-10-09 1981-04-17 Pont A Mousson Bi:metallic steel barrel for continuous casting roller - having external layer of tempered martensite structure stainless steel and inner layer of low carbon manganese molybdenum- niobium steel
JPS5982149A (en) * 1982-11-02 1984-05-12 Nippon Steel Corp Cooling roll for producing ultraquickly cooled metal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU659364B1 (en) * 1994-06-21 1995-05-11 Mitsubishi Jukogyo Kabushiki Kaisha Cooling drum for a continuous casting system and method for manufacturing the same
WO1998052706A1 (en) * 1997-05-23 1998-11-26 Voest-Alpine Industrieanlagenbau Gmbh Casting cylinder for thin-band continuous casting installation

Also Published As

Publication number Publication date
HU208931B (en) 1994-02-28
EP0421908A1 (en) 1991-04-10
AU634818B2 (en) 1993-03-04
NO904263D0 (en) 1990-10-01
CN1050693A (en) 1991-04-17
DE69007001T2 (en) 1994-07-14
PL164353B1 (en) 1994-07-29
DE69007001D1 (en) 1994-04-07
AU6316390A (en) 1991-04-11
PL287149A1 (en) 1991-09-23
IE903457A1 (en) 1991-04-24
HUT57104A (en) 1991-11-28
KR0169721B1 (en) 1999-01-15
FI904829A0 (en) 1990-10-01
ZA907828B (en) 1992-05-27
PT95480A (en) 1991-06-25
CS9004774A3 (en) 1992-02-19
YU185390A (en) 1993-10-20
FR2652525B1 (en) 1994-06-10
FI91134C (en) 1994-05-25
FR2652525A1 (en) 1991-04-05
CA2026244A1 (en) 1991-04-03
DK0421908T3 (en) 1994-06-06
FI91134B (en) 1994-02-15
ATE102098T1 (en) 1994-03-15
KR910007604A (en) 1991-05-30
NO904263L (en) 1991-04-03
CS275363B2 (en) 1992-02-19
CN1034480C (en) 1997-04-09
HU906281D0 (en) 1991-03-28
JP3262560B2 (en) 2002-03-04
ES2050991T3 (en) 1994-06-01
DD298216A5 (en) 1992-02-13
BR9004911A (en) 1991-09-10
JPH03133550A (en) 1991-06-06

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