EP0526360A1 - Procédé permèttant d'améliorer l'état de surface et la régularité d'épaisseur d'une bande mince métallique coulée sur un cylindre - Google Patents

Procédé permèttant d'améliorer l'état de surface et la régularité d'épaisseur d'une bande mince métallique coulée sur un cylindre Download PDF

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Publication number
EP0526360A1
EP0526360A1 EP92420254A EP92420254A EP0526360A1 EP 0526360 A1 EP0526360 A1 EP 0526360A1 EP 92420254 A EP92420254 A EP 92420254A EP 92420254 A EP92420254 A EP 92420254A EP 0526360 A1 EP0526360 A1 EP 0526360A1
Authority
EP
European Patent Office
Prior art keywords
thickness
porous body
strip
cylinder
metal
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.)
Withdrawn
Application number
EP92420254A
Other languages
German (de)
English (en)
French (fr)
Inventor
Philippe Solignac
André Combry
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.)
Constellium Issoire SAS
Original Assignee
Pechiney Rhenalu SAS
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
Application filed by Pechiney Rhenalu SAS filed Critical Pechiney Rhenalu SAS
Publication of EP0526360A1 publication Critical patent/EP0526360A1/fr
Withdrawn legal-status Critical Current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
    • B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires

Definitions

  • the invention relates to the casting of metals in the molten state on a cooled rotating cylinder in order to obtain a thin strip.
  • the liquid metal solidifies on the cold wall of the cylinder in the form of a thin product which, under the effect of rotation, entails through the meniscus an additional quantity of liquid so that 'we finally obtain a continuous metal strip.
  • melt overflow casting process if it is simple in principle, nevertheless presents certain difficulties of industrial application when it is particularly desired to manufacture strips of width relatively large, that is to say greater than a few cm.
  • the gas jet can have a very harmful role because it creates turbulence in the mass of material contained in the injector and causes both the appearance of waves and, in the case where the material is an oxidizable metal, a dispersion of the oxide skins which float on the surface of the bath. All these phenomena are detrimental to the quality of the product produced.
  • the factors which influence the quality of the strips are in particular, in the case of the surface appearance, the macro or microscopic movements of the free surface of the metal bath and in the case of the regularity of the thickness, in addition to the said movements, the strip-wheel heat exchange conditions (temperature of the wheel, of the molten metal and regularity of the heat exchange coefficient).
  • the porous body may be made of graphite or ceramic foam and has the form of either a tube extending parallel to the axis of the cylinder and the porosities of which extend either over its entire periphery or only over the part opposite the metal or a cavity having faces conforming to the shape of the meniscus and of the free surface of the bath, only the said faces being porous.
  • the tube and the cavity are connected to a source of gas such as argon or nitrogen for example, the pressure of which can be adjusted to a value at most equal to 0.5 MPa and are mounted on a system enabling their position in relation to the horizontal surface of the bath and the cylinder.
  • a source of gas such as argon or nitrogen for example
  • This position is determined so as to preferably place the porous surface at most 10 mm from the metal surface and the adjustment must be able to be carried out with an accuracy of 1/10 mm.
  • the third way consists: either by adjusting the gas pressure supplying the porous body, said adjustment being obtained by means known to those skilled in the art such as a pressure reducer, for example. -or and / or by adjusting the position of the porous body using the adjustment system with respect to the surfaces of liquid metal.
  • the porous body a variable porosity parallel to the axis of the cylinder, it is possible to exert a variable pressure and to give the strip a profile of particular thickness.
  • this profile can have a greater thickness in the middle of the strip, which makes it possible to obtain a more regular thickness of the strip after rolling.
  • the invention also has the advantage, due to the use of gas which is not reactive with respect to the metal, of protecting the metal from any oxidation and thus of avoiding any formation of skins which generate vibrations.
  • FIG. 1 there is a casting cylinder 1 rotating in the direction of the arrow 2 internally cooled by a circulation of water not shown, an injector 3 for supplying liquid metal 4 with a free surface 5 shape in contact with the wheel a meniscus 6.
  • the injector is provided with a chute 7 and a level sensor 8. Under the effect of the rotation of the wheel and of the cooling, the liquid metal contained in the injector and in contact with the wheel is entrained and forms a continuous band 9 which moves in the direction of the arrow 10.
  • FIG. 2 we find a part of the elements of FIG. 1 to which is added according to the invention the porous body 11 of cylindrical shape which generates the gas cushion represented by the arrows 12.
  • the invention finds its application in obtaining by casting on wheels sheets of regular thickness having a good surface appearance and a profile suitable for rolling.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP92420254A 1991-07-31 1992-07-28 Procédé permèttant d'améliorer l'état de surface et la régularité d'épaisseur d'une bande mince métallique coulée sur un cylindre Withdrawn EP0526360A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9109976 1991-07-31
FR9109976A FR2679803B1 (fr) 1991-07-31 1991-07-31 Procede permettant d'ameliorer l'etat de surface et la regularite d'epaisseur d'une bande mince metallique coulee sur une roue.

Publications (1)

Publication Number Publication Date
EP0526360A1 true EP0526360A1 (fr) 1993-02-03

Family

ID=9415958

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92420254A Withdrawn EP0526360A1 (fr) 1991-07-31 1992-07-28 Procédé permèttant d'améliorer l'état de surface et la régularité d'épaisseur d'une bande mince métallique coulée sur un cylindre

Country Status (6)

Country Link
US (1) US5253699A (no)
EP (1) EP0526360A1 (no)
AU (1) AU647358B2 (no)
CA (1) CA2072952A1 (no)
FR (1) FR2679803B1 (no)
NO (1) NO922797L (no)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19811434C2 (de) * 1998-03-17 2002-05-16 Mannesmann Ag Verfahren und Vorrichtung zum Vergleichmäßigen eines schmelzflüssigen Metallfilmes
AT408198B (de) * 1998-03-25 2001-09-25 Voest Alpine Ind Anlagen Verfahren zum stranggiessen eines dünnen bandes sowie vorrichtung zur durchführung des verfahrens
WO2013075092A1 (en) * 2011-11-17 2013-05-23 Nucor Corporation Method of continuous casting thin steel strip
JP2017121635A (ja) * 2016-01-05 2017-07-13 株式会社日立産機システム アモルファス合金箔帯製造装置及びそれを用いたアモルファス合金箔帯の製造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987002285A1 (en) * 1985-10-11 1987-04-23 National Aluminum Corporation Method of and apparatus for continuous casting of metal strip
EP0470913A1 (fr) * 1990-08-08 1992-02-12 Pechiney Rhenalu Procédé pour contrôler l'épaisseur d'une bande métallique coulée en continu sur un cylindre

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863700A (en) * 1973-05-16 1975-02-04 Allied Chem Elevation of melt in the melt extraction production of metal filaments
JPS58159948A (ja) * 1982-03-19 1983-09-22 Mitsubishi Heavy Ind Ltd 薄板連続鋳造装置
JPS60199552A (ja) * 1984-03-23 1985-10-09 Nippon Steel Corp 金属薄帯の製造方法
JPS6293050A (ja) * 1985-10-21 1987-04-28 Kawasaki Steel Corp 表面性状の優れた非晶質合金薄帯の製造方法
FR2664513A1 (fr) * 1990-07-16 1992-01-17 Siderurgie Fse Inst Rech Procede et dispositif de controle de l'epaisseur en coulee continue de bande mince de materiau electroconducteur.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987002285A1 (en) * 1985-10-11 1987-04-23 National Aluminum Corporation Method of and apparatus for continuous casting of metal strip
EP0470913A1 (fr) * 1990-08-08 1992-02-12 Pechiney Rhenalu Procédé pour contrôler l'épaisseur d'une bande métallique coulée en continu sur un cylindre

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 47 (M-456)(2104) 25 Février 1986 & JP-A-60 199 552 ( SHIN NIPPON SEITETSU K.K. ) 9 Octobre 1985 *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 301 (M-628)(2748) 30 Septembre 1987 & JP-A-62 093 050 ( KAWASAKI STEEL CORP ) 28 Avril 1987 *
PATENT ABSTRACTS OF JAPAN vol. 7, no. 283 (M-263)(1428) 16 Décembre 1983 & JP-A-58 159 948 ( MITSUBISHI JUKOGYO K.K. ) 22 Septembre 1983 *

Also Published As

Publication number Publication date
NO922797L (no) 1993-02-01
CA2072952A1 (fr) 1993-02-01
AU2047192A (en) 1993-02-04
FR2679803B1 (fr) 1993-10-29
NO922797D0 (no) 1992-07-15
AU647358B2 (en) 1994-03-17
US5253699A (en) 1993-10-19
FR2679803A1 (fr) 1993-02-05

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