EP0360635A1 - Seitenwand für eine Stranggiesseinrichtung zwischen beweglichen Wänden; Einrichtung, die diese Wand enthält; Verfahren, verwendbar zum Stranggiessen von dünnen metallischen Produkten - Google Patents

Seitenwand für eine Stranggiesseinrichtung zwischen beweglichen Wänden; Einrichtung, die diese Wand enthält; Verfahren, verwendbar zum Stranggiessen von dünnen metallischen Produkten Download PDF

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Publication number
EP0360635A1
EP0360635A1 EP89402230A EP89402230A EP0360635A1 EP 0360635 A1 EP0360635 A1 EP 0360635A1 EP 89402230 A EP89402230 A EP 89402230A EP 89402230 A EP89402230 A EP 89402230A EP 0360635 A1 EP0360635 A1 EP 0360635A1
Authority
EP
European Patent Office
Prior art keywords
inserts
movable walls
walls
side wall
casting
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Withdrawn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
EP89402230A
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English (en)
French (fr)
Inventor
Paul Victor Riboud
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
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID, USINOR Sacilor SA filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Publication of EP0360635A1 publication Critical patent/EP0360635A1/de
Withdrawn legal-status Critical Current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
    • 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
    • B22D11/066—Side dams

Definitions

  • the present invention relates to an installation for continuous casting of thin metallic products and in particular steel, between movable walls, in particular between cylinders, and more particularly the side walls commonly designated by the term "small faces", delimiting the casting space. near the side edges of said movable walls.
  • a problem common to different types of continuous casting installation between movable walls is to seal the lateral ends of the casting space located between the movable walls.
  • Another problem is to avoid catching the cast metal on the side walls, this catching being able to cause breakthroughs on the edges of the cast product.
  • Yet another problem is to avoid the formation of a solidified corner in contact with these walls above the neck, that is to say of the narrowest passage level between the movable walls.
  • the cast metal solidifies on contact, but this solidification being difficult to control, problems of jamming, catching or irregularity of the edges of the product may remain, even in the case of side walls in draft.
  • the present invention aims to remedy the aforementioned drawbacks and to promote cooling over the entire width of the cast product and in particular on the edges of its long sides, without however creating a premature solidification in contact with side walls.
  • the object of the present invention is a side wall for a device for continuously casting thin metallic products between movable walls, comprising two cooled movable walls facing each other and driven simultaneously in the same direction and delimiting with two said fixed side walls a casting space.
  • the side wall is characterized in that it comprises a closure plate held against the edges of the movable walls, and two inserts made of material of good thermal conductivity which penetrate into the casting space between the walls movable, adjoin the edge of said movable walls, have a face directed towards the pouring space, extend up to the proximity of the neck between said movable walls, and delimiting between them an area consisting of a coating of material thermally insulating with a flat or concave surface.
  • the metal skin solidified in contact with the cooled movable walls extends on the face of the inserts directed towards the casting space.
  • the continuous skin obtained covers the joint between the movable wall and the inserts, thereby preventing liquid metal infiltration therein.
  • no skin is formed in contact with the inter-insert area of the side walls, since the latter is very insulating.
  • the surface of the side wall opposite the casting space, formed by the faces of the inserts directed towards the casting space and the surface of the insulating coating, is generally in clearance.
  • the relief of the side walls allows lateral expansion of the edges of the cast product.
  • the edges of the skin which form in contact with the inserts are progressively pressed by the ferrostatic pressure against the movable walls.
  • said faces of the inserts facing the casting space are also inclined relative to a vertical plane perpendicular to the movable walls, this inclination gradually reducing from the upper end to the lower end of the inserts , or their faces opposite the casting space are substantially perpendicular to the movable walls.
  • This particular arrangement makes it possible in particular to minimize the forces exerted on the walls of the cylinders, perpendicular thereto.
  • the invention also relates to an installation for continuous casting of thin metallic products between movable walls, in particular between cylinders, this installation being characterized in that it comprises lateral walls according to one of the above arrangements.
  • the subject of the invention is also a process for the continuous casting of thin metallic products, in particular of thin steel strips, according to which the above installation is used, the casting space is supplied with liquid metal while maintaining its level.
  • the movable walls are driven simultaneously and in the same direction, whereby the liquid metal solidifies on contact with said cooled movable walls by forming solidified skins whose edges extend over the surfaces of the inserts directed towards the casting space, these skins widening and thickening as the movable walls move until they meet near the level of the neck between said movable walls, and we extract continuously down the solidified thin metal product.
  • FIGS. 1 to 6 are given purely for educational purposes and it will be understood that the relative dimensions of the various elements have not been voluntarily observed, this in order to facilitate understanding of the subject of the invention and goals.
  • Figure 1 one end of a continuous casting installation between cylinders, comprising two cylinders 1 and 2, the second of which has been symbolized only by the trace 21 of the end of its wall.
  • the two cylinders with parallel axes and located in the same horizontal plane P, are rotated in opposite directions according to arrows 3 and 4, and spaced at the neck 5, corresponding to the level of the plane P passing through the axes of the cylinders, a distance corresponding to the thickness of the cast product.
  • the liquid metal is supplied, according to one of the well-known methods, in the casting space delimited, on the one hand, by the part of the walls of the cylinders situated above the neck and, on the other hand , by the side walls located at the edges of the cylinders and in leaktight contact with said edges. It is clear that the side walls being fixed and the walls of the cylinders movable, a minimum functional clearance must be respected between them to avoid intense friction and the wear which would result therefrom. As a result, the seal cannot be absolute and infiltration of liquid metal may occur. Reducing the risk of infiltration is in particular one of the aims of the present invention.
  • presided over the present invention is precisely to achieve sealing against liquid metal by promoting the extension of the solidified skin on the part of the side wall directly adjacent to the cylinders, while facilitating the shaping of the edges of these skins, and avoiding solidification of the metal in contact with the side walls. It is therefore the solidified skin which covers the joint between cylinder and side wall, which constitutes a tight wall preventing infiltration.
  • FIG. 1 a side wall, or "small face" 6, consisting of a vertical flat plate 61 held with a functional clearance against the ends of the cylinders 1 and 2, that is to say against the edges of the cylindrical surfaces thereof.
  • This plate 61 carries two inserts 7, 8 made of a material with good thermal conductivity.
  • Each insert is a thin strip, preferably close to half the thickness of the cast product, curved according to the curvature of the cylinders, and protrudes from the plate 61 towards the inside of the casting space so as to match the edge 11 of the cylindrical wall.
  • the lower ends 71, 81 of the inserts of the same side wall meet at a level preferably situated slightly above the neck 5.
  • the face 73, 83 of the inserts, facing the casting space, is, at any level, inclined relative to the generator of the cylinder situated at this level, this inclination gradually increasing from the upper ends of the inserts to their lower ends where it is around 90 °.
  • the face 73, 83 of each insert is a left surface, a horizontal generator of which forms with the corresponding generator of the adjacent cylinder, an obtuse angle, for example of approximately 135 °, at the upper end 72, 82, this angle gradually decreasing downwards until it is substantially equal to 90 ° at the lower end.
  • the zone located between the inserts of the same small face consists of a plate or a coating of insulating refractory material 9, the surface 91 of which faces the casting space, is preferably flat and inclined with respect to the vertical to form the draft described above and clearly visible in Figure 2, so as to form a continuous surface with the faces 73, 83 of the inserts, without roughness at their junction lines.
  • the refractory material 9 is hardened on the surface to avoid too rapid wear by the cast metal.
  • the lower ends of the inserts can form, as indicated in FIG. 2, a sudden detachment 62 with respect to the plate 61, similar to that shown in the document EP 212 423 already cited, which allows, at the level of the neck, the free lateral expansion of the edges of the cast product.
  • a sudden detachment 62 with respect to the plate 61 similar to that shown in the document EP 212 423 already cited, which allows, at the level of the neck, the free lateral expansion of the edges of the cast product.
  • the faces 73, 83 of the inserts can also be plane in the same plane as the surface 91 of the insulating refractory material 9, which simplifies the production of said inserts.
  • the continuity of the solidified skin at the joint between cylinders and inserts is also ensured. However, this arrangement is less favorable for the formation and the desired development of said skin, in accordance with the description which will be given in relation to FIGS. 3 to 6.
  • FIG. 3 schematically represents a section at level III near the level N of the liquid metal.
  • the molten metal 10 solidifies and forms, on each cylinder, a solidified skin of small thickness 101, 102.
  • This skin is extended by a tongue 103, 104, solidified in contact with the inserts 7, 8 which are thermally conductive and cooled due to their proximity to the cooled walls of the cylinders and of contact with the metallic mass of the plate 61.
  • the cast metal does not tend to solidify on contact with the insulating refractory material 9. Note that the solidified skin seals from the level above at the point 105, 106 between cylinders and inserts.
  • Figure 4 is a section at intermediate level IV when the skin 101, 102 arrives at this level due to its entrainment by the walls of the rotating cylinders. Simultaneously, the tongues 103, 104 accompany this movement by sliding on the faces 73, 83 of the inserts.
  • the thickness of the skin 101 ⁇ , 102 ⁇ has further increased.
  • the two tabs formed on each insert are applied to the walls of the cylinders and simultaneously meet at 108.
  • the two skins are in total contact and form the product 109 of desired section, the lateral expansion of the edges caused by the rolling effect is authorized by the final increase in width of the casting space, until it comes into contact with the wall portions 63.
  • the device according to the invention - ensures the tightness of the casting space, - allows lateral expansion of the product, - controls the formation and development of solidified skin and especially its edges (tabs), while avoiding the formation of solid skin on the side walls.
  • Figures 7 to 10 show a preferred embodiment of a small face according to the invention.
  • the plate 61 is made up of several elements assembled by screwing, so as to allow the inserts 7, 8 to be maintained. It comprises a flat support plate 64 on which are fixed, by screws 111 and held in position by centering pins 112, two bearing plates 65, 66 whose flat surface is designed to be placed opposite the ends of the cylinders, and shaped so as to have a curved edge 67, 68, of the same radius as the cylinders and precisely following on from these.
  • the metal inserts 7, 8 are applied against the curved edges 67, 68, and in contact with the support plate 64. They are held in position by pins 74 fixed in the support plates 65, 66 which penetrate into oblong holes 75 made in the inserts, so as to prevent the displacement thereof in the direction parallel to the axis of the cylinders, while allowing a slight displacement parallel to the edges of the support plates to allow the longitudinal expansion of said inserts.
  • the thickness of the inserts is constant (for example 2 mm). Their width varies from their upper ends, where they project from the plane of the surface of the support plates by a few millimeters (5 to 10 mm, for example), to their lower ends where the projection is much smaller (1 to 2 mm for example). These values are given for information only and depend in particular on the general dimensions of the installation. These values correspond to a draft of the inserts, and also of the refractory lining of the order of 1 to 3 °.
  • the faces 73, 83 of the inserts 7, 8 are shaped as indicated above, so as to have a regular variation in their inclination relative to the wall of the cylinders. The inserts therefore have at their upper ends, a bevel section with an angle close to 45 °, this angle increasing downwards until forming, at the lower end, a quadrangular section.
  • An intermediate metal plate 69 two sides of which are shaped according to the curvature of the inserts, is inserted between them to keep them pressed against the curved edges 67, 68 of the support plates 65, 66.
  • the intermediate plate 69 is fixed by screw 113 on the support plate 64.
  • the intermediate plate 69 has a thickness less than that of the support plates 65, 66, so as to allow the establishment against this plate 69, and between the inserts, of an insulating refractory material 9 whose face 91 opposite the casting space is flush with the faces 73 and 83 of the inserts.
  • This insulating material can be a prefabricated and glued plate on the intermediate plate 69, or it may be a material deposited in place, for example by projection.
  • the lower ends of the inserts of the intermediate plate 69, and of the insulating refractory lining 9, are located at the same level, slightly above the neck. At this level, the lower ends of the inserts are slightly spaced in order to maintain a certain width at the "tip" of the insulating refractory material, to avoid embrittlement of this tip.
  • the side wall is extended by a guide shoe 120, fixed by screws 114 on the support plate 64.
  • the rear part 121 of the guide shoe is inserted in corresponding recesses 122, 123, produced in plates of support thickness 65, 66.
  • the front part 124 of the guide shoe is machined so as to have edges 125, 126 of curvature corresponding to that of the edges 67, 68 of the support plates 65, 66.
  • the face of this guide shoe, facing the cast product, has above the neck, a clearance area 127 in the extension of the face 91 of the refractory lining 9, and in below the neck (level of plane P), a vertical flat area 128 situated in the same plane as the surface of the support plates 65, 66.
  • the guide shoe 120 is made of a material having good wear resistance characteristics, for example cast iron.
  • the particular configuration of the guide shoe 120 which has just been described, in particular with regard to the undercut area 127, has the advantage, compared with the recess 62 shown in FIG. 2, of ensuring the continuity of the side wall at contact of the cast product, and thus avoid excessively rapid wear or tearing of the lower ends of the inserts and of the refractory lining.
  • the inserts may be made of a material which is not exclusively metallic, such as compounds of the boron nitride type, BN with SiALON or Si3N4, or AlN; or SiC.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP89402230A 1988-09-14 1989-08-08 Seitenwand für eine Stranggiesseinrichtung zwischen beweglichen Wänden; Einrichtung, die diese Wand enthält; Verfahren, verwendbar zum Stranggiessen von dünnen metallischen Produkten Withdrawn EP0360635A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8812074 1988-09-14
FR8812074A FR2636259B1 (fr) 1988-09-14 1988-09-14 Paroi laterale pour une installation de coulee continue entre parois mobiles et installation comportant cette paroi

Publications (1)

Publication Number Publication Date
EP0360635A1 true EP0360635A1 (de) 1990-03-28

Family

ID=9370048

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89402230A Withdrawn EP0360635A1 (de) 1988-09-14 1989-08-08 Seitenwand für eine Stranggiesseinrichtung zwischen beweglichen Wänden; Einrichtung, die diese Wand enthält; Verfahren, verwendbar zum Stranggiessen von dünnen metallischen Produkten

Country Status (10)

Country Link
EP (1) EP0360635A1 (de)
JP (1) JPH02112853A (de)
KR (1) KR900004434A (de)
CN (1) CN1018242B (de)
AU (1) AU618836B2 (de)
BR (1) BR8904579A (de)
DD (2) DD297348A5 (de)
FR (1) FR2636259B1 (de)
RU (1) RU1782189C (de)
ZA (1) ZA896489B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666256A1 (fr) * 1990-09-03 1992-03-06 Usinor Sacilor Installation de coulee continue entre cylindres.
EP0552125A1 (de) * 1992-01-17 1993-07-21 USINOR SACILOR Société Anonyme Doppelrollen Stranggiessanlage mit feuerfesten Seitenwänden
EP0552124A1 (de) * 1992-01-17 1993-07-21 USINOR SACILOR Société Anonyme Vorrichtung zum Stranggiessen eines Metallproduktes zwischen Giesswalzen
EP0561724A1 (de) * 1992-03-18 1993-09-22 Usinor Sacilor Doppelrollen-Stranggiessvorrichtung zum Giessen von metallischen Produkten
US5445211A (en) * 1991-05-30 1995-08-29 Centro Sviluppo Materiali S.P.A. Rolls for strip continuous casting machines
EP0901851A1 (de) * 1997-09-12 1999-03-17 Usinor Seitenwand zur Abdichtung des Giessraumes in einer Zweirollenstranggiessmaschine zum Herstellen metallischer Bänder und damit ausgerüstete Giessmaschine
FR2842130A1 (fr) * 2002-07-12 2004-01-16 Usinor Face laterale pour installation de coulee continue de bandes metalliques entre deux cylindres

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2656244A1 (fr) * 1989-12-26 1991-06-28 Siderurgie Fse Inst Rech Dispositif de coulee continue de produits metalliques minces entre deux cylindres refroidis en rotation.
FR2656550A1 (fr) * 1989-12-29 1991-07-05 Siderurgie Fse Inst Rech Dispositif de coulee continue de metal liquide en bandes minces entre deux cylindres.
CN1325758C (zh) * 2004-02-03 2007-07-11 中铁隧道集团有限公司 盾构机中能调节开口率的装置
CN100363035C (zh) * 2006-08-17 2008-01-23 陈乃车 含有联苯双酯和中药提取物的协同药用组合物
CN100363045C (zh) * 2006-08-17 2008-01-23 江智文 含联苯双酯的辅助治疗肝炎中西药组合物
CN100363042C (zh) * 2006-08-17 2008-01-23 江智文 一种含联苯双酯的组合物
US8191610B2 (en) 2008-11-24 2012-06-05 Nucor Corporation Strip casting apparatus with improved side dam
US10046384B2 (en) 2015-09-30 2018-08-14 Nucor Corporation Side dam with pocket
KR102664079B1 (ko) * 2021-11-29 2024-05-08 주식회사 케이텍 Cvd법으로 제조된 탄화규소 소재의 재생을 통한 고순도 탄화규소 분말의 제조방법

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3038219A (en) * 1958-07-02 1962-06-12 Armco Steel Corp Method and means for high capacity direct casting of molten metal
EP0212423A2 (de) * 1985-08-05 1987-03-04 Hitachi, Ltd. Stranggussvorrichtung vom Zwillingsrollentyp
US4754802A (en) * 1987-08-05 1988-07-05 Nisshin Steel Co., Ltd. Continuous casting apparatus for steel plate

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2613646B1 (fr) * 1987-04-09 1991-02-01 Siderurgie Fse Inst Rech Dispositif d'obturation laterale pour lingotiere de coulee continue entre cylindres
FR2652021A1 (fr) * 1989-06-15 1991-03-22 Siderurgie Fse Inst Rech Paroi d'obturation laterale pour une installation de coulee continue entre parois mobiles.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3038219A (en) * 1958-07-02 1962-06-12 Armco Steel Corp Method and means for high capacity direct casting of molten metal
EP0212423A2 (de) * 1985-08-05 1987-03-04 Hitachi, Ltd. Stranggussvorrichtung vom Zwillingsrollentyp
US4754802A (en) * 1987-08-05 1988-07-05 Nisshin Steel Co., Ltd. Continuous casting apparatus for steel plate

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666256A1 (fr) * 1990-09-03 1992-03-06 Usinor Sacilor Installation de coulee continue entre cylindres.
EP0477045A1 (de) * 1990-09-03 1992-03-25 Usinor Sacilor Zweiwalzenstranggiessanlage
US5172750A (en) * 1990-09-03 1992-12-22 Usinor Sacilor Installation for continuous casting between rolls
US5445211A (en) * 1991-05-30 1995-08-29 Centro Sviluppo Materiali S.P.A. Rolls for strip continuous casting machines
EP0552125A1 (de) * 1992-01-17 1993-07-21 USINOR SACILOR Société Anonyme Doppelrollen Stranggiessanlage mit feuerfesten Seitenwänden
EP0552124A1 (de) * 1992-01-17 1993-07-21 USINOR SACILOR Société Anonyme Vorrichtung zum Stranggiessen eines Metallproduktes zwischen Giesswalzen
FR2686279A1 (fr) * 1992-01-17 1993-07-23 Usinor Sacilor Dispositif de coulee continue entre cylindres d'un produit metallique.
FR2686278A1 (fr) * 1992-01-17 1993-07-23 Usinor Sacilor Dispositif de coulee continue entre cylindres comportant des parois laterales en materiaux refractaires.
FR2688721A1 (fr) * 1992-03-18 1993-09-24 Usinor Sacilor Dispositif de coulee continue d'un produit metallique entre cylindres.
EP0561724A1 (de) * 1992-03-18 1993-09-22 Usinor Sacilor Doppelrollen-Stranggiessvorrichtung zum Giessen von metallischen Produkten
EP0901851A1 (de) * 1997-09-12 1999-03-17 Usinor Seitenwand zur Abdichtung des Giessraumes in einer Zweirollenstranggiessmaschine zum Herstellen metallischer Bänder und damit ausgerüstete Giessmaschine
FR2768354A1 (fr) * 1997-09-12 1999-03-19 Usinor Face laterale pour l'obturation de l'espace de coulee d'une installation de coulee continue de bandes metalliques entre cylindres, et installation de coulee ainsi equipee
CN1074328C (zh) * 1997-09-12 2001-11-07 于西纳公司 封闭金属带材双辊连铸机铸腔的侧壁和配有该侧壁的连铸机
FR2842130A1 (fr) * 2002-07-12 2004-01-16 Usinor Face laterale pour installation de coulee continue de bandes metalliques entre deux cylindres
WO2004007116A2 (fr) * 2002-07-12 2004-01-22 Usinor Face laterale pour installation de coulee continue de bandes metalliques entre deux cylindres
WO2004007116A3 (fr) * 2002-07-12 2004-04-08 Usinor Face laterale pour installation de coulee continue de bandes metalliques entre deux cylindres
US7258157B2 (en) 2002-07-12 2007-08-21 Unisor Lateral face of an installation used for the twin-roll continuous casting of metal bands

Also Published As

Publication number Publication date
BR8904579A (pt) 1990-04-24
AU4002589A (en) 1990-03-22
ZA896489B (en) 1990-05-30
KR900004434A (ko) 1990-04-12
DD284619A5 (de) 1990-11-21
RU1782189C (ru) 1992-12-15
CN1041123A (zh) 1990-04-11
DD297348A5 (de) 1992-01-09
CN1018242B (zh) 1992-09-16
AU618836B2 (en) 1992-01-09
JPH02112853A (ja) 1990-04-25
FR2636259A1 (fr) 1990-03-16
FR2636259B1 (fr) 1994-03-11

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