EP0477121B1 - Virole pour cylindre de coulée continue des métaux, notamment de l'acier, entre cylindres ou sur un cylindre - Google Patents
Virole pour cylindre de coulée continue des métaux, notamment de l'acier, entre cylindres ou sur un cylindre Download PDFInfo
- Publication number
- EP0477121B1 EP0477121B1 EP91470024A EP91470024A EP0477121B1 EP 0477121 B1 EP0477121 B1 EP 0477121B1 EP 91470024 A EP91470024 A EP 91470024A EP 91470024 A EP91470024 A EP 91470024A EP 0477121 B1 EP0477121 B1 EP 0477121B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- copper
- cylinders
- sleeve
- casting
- dispersion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 7
- 239000002184 metal Substances 0.000 title claims abstract description 7
- 238000009749 continuous casting Methods 0.000 title claims description 9
- 229910000831 Steel Inorganic materials 0.000 title claims description 5
- 239000010959 steel Substances 0.000 title claims description 5
- 238000005266 casting Methods 0.000 title description 3
- 229910052802 copper Inorganic materials 0.000 claims abstract description 20
- 239000010949 copper Substances 0.000 claims abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000006185 dispersion Substances 0.000 claims abstract description 16
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 3
- 238000005219 brazing Methods 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 150000001879 copper Chemical class 0.000 abstract description 3
- 229910017985 Cu—Zr Inorganic materials 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910017770 Cu—Ag Inorganic materials 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229910001175 oxide dispersion-strengthened alloy Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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 the continuous casting of metals, in particular steel, comprising a ferrule intended to be brought into contact with the molten liquid metal, the casting device comprising either a single rotary cylinder or a pair of cylinders. parallel rotarys accompanying the pouring of the liquid metal by their rotation.
- the walls of the ingot molds for continuous casting of liquid metals with a high melting point such as steel are conventionally made of copper alloy, vigorously cooled by an intense circulation of cooling fluid, generally water, and surface coated, by electrolytic deposition of a metallic layer with a higher melting point, such as nickel or chromium (EP-A-320572).
- a metallic layer with a higher melting point such as nickel or chromium (EP-A-320572).
- EP-A-320572 nickel or chromium
- the nickel or chromium deposition process by electrolytic process is relatively long and difficult to control perfectly, because it is necessary to ensure the regularity of the thickness at all points of the surface of the coating, which implies to control the process well , especially its electrical aspects. Otherwise, local heterogeneities in the properties of the surfaces occur, which can lead, among other things, to porosities which will lead to premature scrapping of the molds. Such a handicap appears difficult to overcome in the case of complex massive walls such as the ferrules of continuous casting cylinders.
- the invention therefore aims to provide a ferrule for continuous casting cylinder which is easy to manufacture and which has good mechanical and physical characteristics.
- the shell is made of copper or copper alloy reinforced by a dispersion of oxides, for example particles of alumina.
- the continuous casting cylinder comprising a core assembled to a ferrule which surrounds it is characterized in that said ferrule is made of copper or copper alloy reinforced by a dispersion of oxides
- copper reinforced with a dispersion of oxides can withstand very high temperatures (800 to 900 ° C) without irreversible destruction of its mechanical properties.
- the copper reinforced by a dispersion of oxides (Oxide Dispersion Strengthened) - in short copper ODS - is presented as a matrix of pure copper with a dispersion of particles of oxides, for example of alumina, of 50 ⁇ in diameter as order of size, and in any case less than 100 ⁇ , which block the movement of 'dislocations.
- This copper reinforced by dispersion of oxides can in particular be produced by powder metallurgy.
- An alloy, for example copper-aluminum, is atomized and the powder obtained undergoes gentle oxidation, which results in the dispersion of the oxides. This oxidation is carried out either before densification or during it.
- the densification is done by hot extrusion-extrusion, either by hot isostatic compression, followed or not by a hot transformation or forging and cold hardening.
- the amount of dispersoids varies from 0.7 to 2.7% by volume approximately.
- copper reinforced by a dispersion of oxides has significantly better mechanical properties from 350 ° C, the gap increasing very quickly above. Furthermore, this copper has remarkable resistance to softening, which makes it possible to retain brazing as an assembly technique.
- This oxide-dispersed copper does not undergo any structural transformation, so that its thermal conductivity does not depend on the temperature, unlike structural hardening alloys for which the maximum permissible working temperature can be greatly reduced following a redissolution of the precipitates, linked to overheating of the metal.
- copper reinforced by dispersion of oxides has a higher yield strength than these conventional alloys.
- the elastic limit at ambient temperature is 420 MPa
- the tensile strength is 490 MPa
- l elongation at break is around 15%.
- Cold work hardening significantly improves the elastic limit, which can go up to 500 MPa, with a slight drop in elongation at break.
- copper reinforced with a dispersion of oxides has good thermal conductivity and can be cold rolled, which makes it possible to manufacture ferrules which can be brazed on the core of the casting cylinder.
- the dispersion of alumina can be replaced by a dispersion of any other suitable oxide.
- oxide-dispersed copper is meant not only pure copper but also any copper alloy of use compatible with the requirements of the continuous casting of metals with a high melting point, and capable of allowing such a dispersion, for example a Cu-Ag alloy, or Cu-Cr-Ti.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Powder Metallurgy (AREA)
- Electroplating Methods And Accessories (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
- La présente invention a pour objet un cylindre de coulée continue des métaux, notamment de l'acier, comportant une virole destinée à être mise au contact du métal liquide coulé, le dispositif de coulée comportant soit un seul cylindre rotatif, soit une paire de cylindres rotatifs parallèles accompagnant la coulée du métal liquide par leur rotation.
- On sait que les parois des lingotières de coulée continue de métaux liquides à point de fusion élevé tel que l'acier, sont classiquement réalisées en alliage de cuivre, énergiquement refroidi par une circulation intense de fluide de refroidissement, généralement de l'eau, et revêtu superficiellement, par dépôt électrolytique d'une couche métallique à plus haut point de fusion, tel que du nickel ou du chrome (EP-A-320572). Cette couche de métal moins conducteur de la chaleur que le cuivre est destinée notamment à limiter la température maximale pouvant être atteinte par l'alliage de cuivre au contact de l'acier liquide coulé.
- Or, le procédé de dépôt de nickel ou de chrome par voie électrolytique est relativement long et difficile à maîtriser parfaitement, car il faut assurer la régularité de l'épaisseur en tout point de la surface du revêtement, ce qui implique de bien maîtriser le processus, notamment ses aspects électriques. A défaut, des hétérogénéités locales des propriétés des surfaces adviennent, qui peuvent aboutir entre autres à des porosités qui conduiront à une mise au rebut prématurée des lingotières. Un tel handicap apparaît difficilement surmontable dans le cas de parois massives complexes telles que les viroles de cylindres de coulée continue.
- L'invention a donc pour but de proposer une virole pour cylindre de coulée continue qui soit aisée à fabriquer et qui ait de bonnes caractéristiques mécaniques et physiques.
- Suivant l'invention, la virole est en cuivre ou alliage de cuivre renforcé par une dispersion d'oxydes, par exemple des particules d'alumine.
- En outre, suivant l'invention, le cylindre de coulée continue comprenant un noyau assemblé à une virole qui l'entoure est caractérisé en ce que ladite virole est en cuivre ou alliage de cuivre renforcé par une dispersion d'oxydes
- On constate, de manière surprenante, que le cuivre renforcé par une dispersion d'oxydes peut supporter de très hautes températures (800 à 900°C) sans destruction irréversible de ses propriétés mécaniques.
- Le cuivre renforcé par une dispersion d'oxydes (Oxide Dispersion Strengthened) - en abrégé cuivre ODS - se présente comme une matrice de cuivre pur avec une dispersion de particules d'oxydes, par exemple d'alumine, de 50 Å de diamètre comme ordre de grandeur, et de toute façon inférieur à 100 Å, qui bloquent le mouvement des' dislocations. Ce cuivre renforcé par dispersion d'oxydes peut être notamment réalisé par métallurgie des poudres. On atomise un alliage, par exemple cuivre-aluminium, et la poudre obtenue subit une oxydation ménagée, qui entraîne la dispersion des oxydes. Cette oxydation est effectuée, soit avant la densification, soit au cours de celle-ci. La densification se fait par filage-extrusion à chaud, soit par compression isostatique à chaud, suivie ou non d'une transformation à chaud ou forgeage et d'un écrouissage à froid. La quantité de dispersoïdes varie de 0,7 à 2,7% en volume approximativement.
- Pour des caractéristiques physiques proches de celles du cuivre, ou même des alliages du cuivre, le cuivre renforcé par une dispersion d'oxydes présente des propriétés mécaniques nettement supérieures dès 350°C, l'écart croissant très rapidement au-dessus. Par ailleurs ce cuivre présente une résistance remarquable à l'adoucissement, ce qui permet de retenir le brasage comme technique d'assemblage. Ce cuivre à dispersion d'oxydes ne subit aucune transformation structurale, de sorte que sa conductibilité thermique ne dépend pas de la température, contrairement aux alliages à durcissement structural pour lesquels la température maximale admissible de travail peut être fortement réduite à la suite d'une remise en solution des précipités, liée à une surchauffe du métal.
- Outre une plus grande facilité de fabrication que les alliages de cuivre revêtus électrolytiquement de nickel (ou de chrome), le cuivre renforcé par dispersion d'oxydes présente une limite d'élasticité supérieure à ces alliages classiques. Ainsi pour un alliage à 0,7%, de Al₂O₃ pris à l'état brut de compression isostatique à chaud, la limite élastique à la température ambiante est de 420 MPa, la résistance à la rupture s'élève à 490 MPa, et l'allongement à la rupture s'établit autour de 15%. Un écrouissage à froid améliore notablement la limite élastique, qui peut monter jusqu'à 500 MPa, avec une légère baisse de l'allongement à rupture.
- Par ailleurs, le cuivre renforcé par une dispersion d'oxydes présente une bonne conductibilité thermique et peut être laminé à froid, ce qui permet de fabriquer des viroles pouvant être brasées sur le noyau du cylindre de coulée.
- L'invention n'est pas limitée à la réalisation décrite et peut comporter des variantes d'éxécution. En particulier, la dispersion d'alumine peut être remplacée par une dispersion de tout autre oxyde approprié. De même, par cuivre à dispersion d'oxydes, il faut entendre non seulement du cuivre pur mais également tout alliage du cuivre d'usage compatible avec les exigences de la coulée continue des métaux à haut point de fusion, et apte à permettre une telle dispersion, par exemple un alliage Cu-Ag, ou Cu-Cr-Ti.
Claims (4)
- Virole pour cylindre de coulée continue des métaux, notamment de l'acier, entre cylindres ou sur un cylindre, destinée à être mise au contact du métal liquide coulé, caractérisée en ce qu'elle est en cuivre ou alliage de cuivre renforcé par une dispersion d'oxydes.
- Virole selon la revendication 1, caractérisée en ce que l'oxyde est de l'alumine.
- Cylindre de coulée continue comprenant un noyau assemblé à une virole qui l'entoure, caractérisé en ce que ladite virole est en cuivre ou alliage de cuivre renforcé par une dispersion d'oxydes.
- Cylindre selon la revendication 3, caractérisé en ce que le joint d'assemblage est une brasure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9011400 | 1990-09-14 | ||
| FR9011400A FR2666757B1 (fr) | 1990-09-14 | 1990-09-14 | Virole pour cylindre de coulee continue des metaux, notamment de l'acier, entre cylindres ou sur un cylindre. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0477121A1 EP0477121A1 (fr) | 1992-03-25 |
| EP0477121B1 true EP0477121B1 (fr) | 1994-09-07 |
Family
ID=9400346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91470024A Expired - Lifetime EP0477121B1 (fr) | 1990-09-14 | 1991-09-02 | Virole pour cylindre de coulée continue des métaux, notamment de l'acier, entre cylindres ou sur un cylindre |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0477121B1 (fr) |
| AT (1) | ATE110997T1 (fr) |
| DE (1) | DE69103854T2 (fr) |
| DK (1) | DK0477121T3 (fr) |
| ES (1) | ES2069867T3 (fr) |
| FR (1) | FR2666757B1 (fr) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0687515B1 (fr) | 1994-06-13 | 2000-09-20 | Mitsubishi Jukogyo Kabushiki Kaisha | Rouleau de refroidissement pour la coulée continue et procédé pour produire ce rouleau |
| KR100370804B1 (ko) * | 1994-07-18 | 2003-03-15 | 지멘스 악티엔게젤샤프트 | 주조롤러용내마모층 |
| US5564490A (en) * | 1995-04-24 | 1996-10-15 | Alliedsignal Inc. | Homogeneous quench substrate |
| EP1296935B1 (fr) * | 2000-07-05 | 2009-03-25 | Speedel Pharma AG | Procede de preparation d'amide d'octanoyl substitues |
| CH692184A5 (de) | 2000-12-30 | 2002-03-15 | Main Man Inspiration Ag | Verfahren zum Betreiben einer Bandgiessmaschine sowie ein Mantelring für eine Giessrolle zur Durchführung des Verfahrens. |
| CH692185A5 (de) * | 2000-12-30 | 2002-03-15 | Main Man Inspiration Ag | Mantelring einer Giessrolle für eine Bandgiessmaschine, sowie ein Verfahren für den Gebrauch der Giessrolle. |
| CH692183A5 (de) * | 2000-12-30 | 2002-03-15 | Main Man Inspiration Ag | Mantelring für eine Giessrolle einer Bandgiessmaschine. |
| DE10311153A1 (de) * | 2003-03-14 | 2004-09-23 | Km Europa Metal Ag | Verfahren zur Herstellung eines Hohlzylinders aus Kupfer oder einer Kupferlegierung sowie Gießrolle aus einem Hohlzylinder |
| CN113046594B (zh) * | 2021-03-11 | 2022-03-18 | 郑州大学 | 一种高强高导热铜合金材料辊套及其制备方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5756141A (en) * | 1980-08-20 | 1982-04-03 | Pioneer Electronic Corp | Manufacturing device of thin strip |
| JPS58205657A (ja) * | 1982-05-25 | 1983-11-30 | Kawasaki Steel Corp | 急冷凝固による金属薄帯の製造用の冷却体 |
| DE3725950A1 (de) * | 1987-08-05 | 1989-02-16 | Kabel Metallwerke Ghh | Verwendung einer kupferlegierung als werkstoff fuer stranggiesskokillen |
| EP0320572B1 (fr) * | 1987-12-17 | 1992-12-23 | Kawasaki Steel Corporation | Cylindre de refroidissement pour la fabrication de bandes métalliques minces trempées |
| JPH01170553A (ja) * | 1987-12-25 | 1989-07-05 | Kawasaki Steel Corp | 急冷金属薄帯の製造装置 |
-
1990
- 1990-09-14 FR FR9011400A patent/FR2666757B1/fr not_active Expired - Lifetime
-
1991
- 1991-09-02 DK DK91470024.0T patent/DK0477121T3/da active
- 1991-09-02 DE DE69103854T patent/DE69103854T2/de not_active Expired - Fee Related
- 1991-09-02 EP EP91470024A patent/EP0477121B1/fr not_active Expired - Lifetime
- 1991-09-02 ES ES91470024T patent/ES2069867T3/es not_active Expired - Lifetime
- 1991-09-02 AT AT91470024T patent/ATE110997T1/de not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ATE110997T1 (de) | 1994-09-15 |
| DK0477121T3 (da) | 1995-02-06 |
| EP0477121A1 (fr) | 1992-03-25 |
| DE69103854T2 (de) | 1995-03-23 |
| FR2666757B1 (fr) | 1992-12-18 |
| DE69103854D1 (de) | 1994-10-13 |
| ES2069867T3 (es) | 1995-05-16 |
| FR2666757A1 (fr) | 1992-03-20 |
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