EP0490800B1 - Zylinder für Einzel- oder Doppelrollenstranggiessen. - Google Patents

Zylinder für Einzel- oder Doppelrollenstranggiessen. Download PDF

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Publication number
EP0490800B1
EP0490800B1 EP91470038A EP91470038A EP0490800B1 EP 0490800 B1 EP0490800 B1 EP 0490800B1 EP 91470038 A EP91470038 A EP 91470038A EP 91470038 A EP91470038 A EP 91470038A EP 0490800 B1 EP0490800 B1 EP 0490800B1
Authority
EP
European Patent Office
Prior art keywords
shell
support piece
support
hand
roll
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
EP91470038A
Other languages
English (en)
French (fr)
Other versions
EP0490800A1 (de
Inventor
Georges Raisson
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 Sacilor En Thyssen Stahl AG
Original Assignee
Thyssen Edelstahlwerke AG
Thyssen Stahl AG
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
Application filed by Thyssen Edelstahlwerke AG, Thyssen Stahl AG, USINOR Sacilor SA filed Critical Thyssen Edelstahlwerke AG
Publication of EP0490800A1 publication Critical patent/EP0490800A1/de
Application granted granted Critical
Publication of EP0490800B1 publication Critical patent/EP0490800B1/de
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

Definitions

  • the present invention relates to the continuous casting of strips of metal, in particular steel, on a cylinder or between two cylinders. More specifically, it relates to this type of casting rolls which are commonly constituted by a rigid internal core and an energetically cooled external ferrule, in contact with which the cast metal cools and solidifies to form the strip which is extracted. continuously 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.
  • a cooling fluid in channels drilled through its thickness.
  • the material constituting the shell is a good conductor of heat, namely copper or one of its alloys.
  • this ferrule must be rigid enough not to deform, while not cracking, under the effect of mechanical and thermal stresses to which it is subjected during repeated casting cycles.
  • the shell 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 ring is described for example in EP-A-0428464 (the French patent application No. 2,654,372 issued 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 linked to the core in its middle part and over its entire circumference by a dovetail or T-shaped slide assembly.
  • the ferrule is in contact of the core over its entire width and it is held 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, in particular its resistance to cracking.
  • the invention relates to a casting cylinder of a continuous casting installation on one or between two such cylinders comprising an outer ferrule made of copper or copper alloy and a central core, characterized in that the ferrule is linked to an underlying cylindrical support part over their entire contact surface by a non-fusion metallurgical connection produced by diffusion-welding, the support part being made of a steel whose coefficient of expansion is equal to or greater than that ferrule material.
  • the idea underlying the invention consists in opting for a support piece which expands as much, or even more, with heat than the constituent material of the shell, so as to obtain, after their hot assembly (welding-diffusion) and return to ambient temperature, placing the shell in compression preload favorable to its resistance in use in contact with the cast metal.
  • the core can itself constitute the support part, or, preferentially, 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 made of copper or a copper alloy, is therefore not very capable of undergoing significant mechanical stresses. Thanks to the invention, there is in fact produced a composite part 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 part 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 shell parallel to its axis, supply and return channels cross the ferrule-support part interface and tubes are placed in these supply and return channels at the interface so as to seal between them and on the one hand the ferrule and on the other apart from the support piece.
  • the cylinder has grooves made at the shell-support part interface, and tubes are placed in these grooves and tightly connected at their ends with on the one hand the shell and on the other hand the part. of support.
  • the casting 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.
  • composite ferrule made of copper alloy is assembled on the support part 3 by diffusion welding, this assembly being carried out beforehand by hot isostatic compression, which leads to obtaining a composite part ferrule-support part, which will be called hereinafter "composite ferrule".
  • Diffusion welding by hot isostatic compression makes it possible to obtain a diffusion bond in the solid state.
  • This assembly technique requires a 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 piece, which allows for example to produce these in metals difficult to assemble directly by this technique .
  • a metal or alloy for example nickel or an iron-nickel alloy with 42% nickel
  • the ferrule 6, made of a material having good thermal conductivity and sufficient mechanical resistance characteristics at relatively high temperatures, above 400 ° C., is for example made of a Cu-Cr-Zr alloy, preferably in the state hyper soaked.
  • 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 made 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 ensure sealing of the interface required 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 part, 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 of 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)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)
  • Continuous Casting (AREA)
  • Crushing And Grinding (AREA)
  • Contacts (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Claims (8)

  1. Gießwalze für eine Anlage zum Stranggießen zwischen einer oder zwei derartiger Walzen, mit einem Außenmantel (6) aus Kupfer oder aus einer Kupferlegierung und mit einem inneren Kern (2), dadurch gekennzeichnet, daß der Mantel mit einem darunterliegenden zylindrischen Tragteil (3) über die gesamte Berührungsfläche verbunden ist mittels einer metallurgischen Verbindung in Form eines Diffusionsschweißens ohne Schmelzvorgang, wobei das Tragteil aus einem Stahl besteht, dessen Ausdehnungskoeffizient gleich oder größer als derjenige des Materials des Mantels (6) ist.
  2. Walze nach Anspruch 1, dadurch gekennzeichnet, daß das Tragteil (3) ein ringförmiges Teil ist, dessen äußere Oberfläche zylindrisch ist und das im Inneren eine mechanische Verbindungsanordnung mit dem Kern aufweist.
  3. Walze nach Anspruch 1, dadurch gekennzeichnet, daß der Kern das Tragteil darstellt.
  4. Walze nach Anspruch 1, dadurch gekennzeichnet, daß das Tragteil aus rostfreiem Stahl besteht.
  5. Walze nach Anspruch 1, dadurch gekennzeichnet, daß der Mantel aus einer Legierung aus Cu-Cr-Zr besteht.
  6. Walze nach Anspruch 1, dadurch gekennzeichnet, daß sie an der Berührungsfläche (9) zwischen dem Mantel und dem Tragteil eine dünne Schicht aus einem Metall oder einer Legierung aufweist, die in der Lage ist mittels eines Diffusionsschweißvorgangs einerseits mit dem den Mantel bildenden Metall und andererseits mit demjenigen des Tragteils eine Verbindung einzugehen.
  7. Walze nach Anspruch 1, dadurch gekennzeichnet, daß Kühlkanäle (7) in die Wanddicke des Mantels parallel zu seiner Achse gebohrt sind, wobei Zufuhr- und Abfuhrkanäle die Berührungsfläche zwischen Mantel-Tragteil durchsetzen und daß Rohre (11) in die Zufuhr- und Abfuhrkanäle auf Höhe der Berührungsfläche derart eingesetzt sind, daß eine Abdichtung zwischen ihnen und einerseits dem Mantel und andererseits dem Tragteil gewährleistet ist.
  8. Walze nach Anspruch 1, dadurch gekennzeichnet, daß sie Nuten (13) aufweist, die in der Berührungsfläche zwischen Mantel-Tragteil vorgesehen sind und daß Rohre (14) in diese Nuten eingesetzt sind und in dichter Weise an ihren Enden einerseits mit dem Mantel und andererseits mit dem Tragteil verbunden sind.
EP91470038A 1990-12-07 1991-12-04 Zylinder für Einzel- oder Doppelrollenstranggiessen. Expired - Lifetime EP0490800B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9015535 1990-12-07
FR9015535A FR2670144B1 (fr) 1990-12-07 1990-12-07 Cylindre pour la coulee continue sur un ou entre deux cylindres, et son procede de fabrication.

Publications (2)

Publication Number Publication Date
EP0490800A1 EP0490800A1 (de) 1992-06-17
EP0490800B1 true EP0490800B1 (de) 1995-10-04

Family

ID=9403142

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91470038A Expired - Lifetime EP0490800B1 (de) 1990-12-07 1991-12-04 Zylinder für Einzel- oder Doppelrollenstranggiessen.

Country Status (7)

Country Link
EP (1) EP0490800B1 (de)
AT (1) ATE128656T1 (de)
DE (2) DE69113588T2 (de)
DK (1) DK0490800T3 (de)
ES (1) ES2079051T3 (de)
FR (1) FR2670144B1 (de)
GR (1) GR3017932T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1781623B (zh) * 2004-11-30 2012-01-11 宝山钢铁股份有限公司 连铸结晶辊制造方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0680796A1 (de) * 1994-05-02 1995-11-08 Siemens Aktiengesellschaft Walze für eine Anlage zum kontinuierlichen Giessen
DE69425960T2 (de) 1994-06-13 2001-03-22 Mitsubishi Heavy Ind Ltd Kühlwalze zum kontinuierlichen Giessen und deren Herstellung
AUPN811396A0 (en) * 1996-02-16 1996-03-07 Bhp Steel (Jla) Pty Limited Roll cooling structure for twin roll continuous caster
FR2779983B1 (fr) 1998-06-23 2000-07-13 Commissariat Energie Atomique Procede d'assemblage par soudage diffusion d'un acier inoxydable martensitique et d'un alliage de cuivre, et element bimetallique obtenu
IT1316320B1 (it) * 2000-02-01 2003-04-10 Ohg Bruno Presezzi S R L Rullo di colata continua, particolarmente per la produzione di nastroin alluminio o in lega di alluminio.
DE10311151A1 (de) * 2003-03-14 2004-09-23 Km Europa Metal Ag Verfahren zur Herstellung einer hohlzylindrischen Gießrolle und Gießrolle

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2367557A1 (fr) * 1976-10-15 1978-05-12 Usinor Perfectionnements aux rouleaux de guidage, notamment pour installation de coulee continue
JPS6059076B2 (ja) * 1981-04-20 1985-12-23 株式会社日立製作所 複合ロ−ルの製造方法
JPS5982149A (ja) * 1982-11-02 1984-05-12 Nippon Steel Corp 超急冷金属製造用冷却ロ−ル
JPS6030563A (ja) * 1983-07-30 1985-02-16 Kuroki Kogyosho:Kk 熱間ロ−ルの製造法
JPS6030562A (ja) * 1983-07-30 1985-02-16 Kuroki Kogyosho:Kk 熱間ロ−ル用スリ−ブの製造法
DE3910603A1 (de) * 1989-04-01 1990-10-04 Wahl Verschleiss Tech Verfahren zur herstellung eines verbundkoerpers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1781623B (zh) * 2004-11-30 2012-01-11 宝山钢铁股份有限公司 连铸结晶辊制造方法

Also Published As

Publication number Publication date
DE69113588T2 (de) 1996-03-21
DE4140319A1 (de) 1992-06-11
GR3017932T3 (en) 1996-02-29
ATE128656T1 (de) 1995-10-15
FR2670144A1 (fr) 1992-06-12
DE69113588D1 (de) 1995-11-09
FR2670144B1 (fr) 1995-01-06
DK0490800T3 (da) 1996-02-12
EP0490800A1 (de) 1992-06-17
ES2079051T3 (es) 1996-01-01

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