EP4215296A1 - Plaque de lingotière à large face, lingotière de coulée continue et procédé de fabrication d'une plaque de lingotière à large face - Google Patents

Plaque de lingotière à large face, lingotière de coulée continue et procédé de fabrication d'une plaque de lingotière à large face Download PDF

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Publication number
EP4215296A1
EP4215296A1 EP22209681.0A EP22209681A EP4215296A1 EP 4215296 A1 EP4215296 A1 EP 4215296A1 EP 22209681 A EP22209681 A EP 22209681A EP 4215296 A1 EP4215296 A1 EP 4215296A1
Authority
EP
European Patent Office
Prior art keywords
contact surface
depression
continuous casting
mold plate
mold
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.)
Pending
Application number
EP22209681.0A
Other languages
German (de)
English (en)
Inventor
Jörn HOFFMEISTER
Thomas Lamberti
Holger Beyer-Steinhauer
Josef Deussen
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.)
SMS Group GmbH
Original Assignee
SMS Group GmbH
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 SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP4215296A1 publication Critical patent/EP4215296A1/fr
Pending legal-status Critical Current

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    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0408—Moulds for casting thin slabs
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0406—Moulds with special profile

Definitions

  • the invention relates to a continuous casting mold, in particular a thin slab continuous casting mold.
  • the invention relates to a method for producing a wide side mold plate for a continuous casting mold, wherein the wide side mold plate is produced with a contact surface for contacting a molten metal poured into the continuous casting mold and a cast strand resulting from it, wherein a depression is formed on the contact surface, which is arranged in a width direction of the contact surface in a central region of the contact surface and has a depth that increases continuously in the direction of an upper edge of the contact surface on the mold inlet side, the depression being formed in such a way that they can be continuously differentiated into one on both sides in the width direction of the contact surface flat surface section of the contact surface merges, the surface sections being arranged in a common plane.
  • CN 101 412 080 A discloses a continuous casting mold having a sprue whose width progressively decreases from an entrance of the continuous casting mold.
  • DE 39 07 351 A1 relates to a mold with a pouring funnel, wherein a contour of an inner wall of the pouring funnel in the direction of passage of the strand is designed in such a way that its radii gradually becoming larger in the direction of passage of the strand merge into the contour of the inner wall of the mold.
  • EP 0 149 734 A2 relates to a mold for the continuous casting of steel strip.
  • the mold has cooled broad side walls and narrow side walls, the broad side walls forming a funnel-shaped pouring area which is reduced to the narrow side walls and in the direction of casting to the format of the cast strip.
  • the wide side walls run parallel to the side of the pouring area at a distance corresponding to the strip thickness up to the respective narrow side wall.
  • EP 0 909 597 A1 discloses a surface contour for a broadside mold plate having a central depression that extends the full height of the broadside mold plate and continues further into an underlying segment.
  • Existing broad side mold plates therefore generally have a pouring funnel shape which has a combination of radii on the upper mold entry side of a broad side mold plate or the contour of which changes continuously over the height of the broad side mold plate.
  • it is also known to continue the pouring funnel up to the mold exit side of a wide side mold plate and beyond that into the rollers of a strand guide.
  • stress peaks occur in a newly formed strand shell due to the reversal of the direction of curvature, which can lead to cracks in the continuously cast product, i.e. the cast strand.
  • One object of the invention is to further develop a known broadside mold plate, a known continuous casting mold and a method for producing a continuous casting mold such that mechanical stress peaks and a mechanical stress level in the strand shell of a cast strand produced are minimized.
  • a wide-side mold plate according to the invention for a continuous casting mold has a contact surface for contacting a molten metal poured into the continuous casting mold and a cast strand resulting from it, with a depression being formed on the contact surface, which is arranged in a central region of the contact surface with respect to a width direction of the contact surface and has a depth which increases continuously in the direction of an upper edge of the contact surface on the mold entry side, the depression in the width direction of the contact surface on both sides being at least continuously, preferably continuously differentiable into a flat formed surface section of the contact surface, with the surface sections being arranged in a common plane, with the depression having a constant width over its height, with a further flat lower surface section of the contact surface being arranged between the lower end of the depression and the lower edge of the contact surface on the mold outlet side, and with the depression in the height direction of the contact surface merging into the further lower surface section in an at least continuous lower transition.
  • the invention proposes a broadside mold plate, for example a broadside mold copper plate, in which the indentation of constant width in the vertical direction leads continuously to the upper edge of the further flat (lower) surface section and there in the lower transition at least continuously merges into the further flat surface section of the contact surface. Due to the at least constant formation of the lower transition between the depression and the further flat lower surface section of the contact surface, a very low-stress deflection of the strand shell of the cast strand from a funnel area of the continuous casting mold formed by the depression into the vertical takes place in the lower transition.
  • the vertical line is formed by the three plane-parallel, flat surface sections of the two opposing broadside mold plates the continuous casting mold.
  • At least continuous means that a corresponding transition can have edges in the form of kinks, but is formed "at least without stair-like cracks or steps” in the surface. Continuity is a prerequisite for continuous differentiability. In this respect, the term “at least continuously” also includes continuous differentiability.
  • bottom refers to the representation and arrangement of the broadside mold plate in the figures.
  • transition zone means a special embodiment of this "lower transition”, which in this case is smooth, ie continuously differentiable.
  • the contact surface of the wide-side mold plate according to the invention thus has the plane-parallel flat surface sections and the recess, which is bordered by the flat surface sections except for its upper edge on the edge of the contact surface on the mold inlet side.
  • a molten metal poured into the continuous casting mold using an immersion casting process, for example, is progressively cooled as it moves from top to bottom in the mold through contact with the broadside mold plate, whereby a strand shell or a cast strand is formed, which is guided along the broadside mold plate before it emerges from the continuous casting mold.
  • the inventive design of the depression with a constant width over its height, the lower height of the depression than the height of the wide side mold plate and the at least constant lower transition between the depression and the further flat lower surface section of the contact surface can significantly reduce the introduction of mechanical stresses into the forming or formed strand shell of the cast strand compared to the use of conventional wide side mold plates.
  • the curvature contour of the surface of the depression of the wide-side mold plate is defined by a surface function y(x,z), as is described below in the exemplary embodiments.
  • the contour of the indentation or the indentation itself is described, among other things, by the graph of a periodic mathematical function in which the function values are repeated at regular intervals.
  • the surface function only describes the lower transition between the depression and the lower surface section as continuous.
  • the lower transition of the depression is designed in the form of a transition zone with an upper one boundary between the depression and the transition zone and a lower boundary between the transition zone and the further lower surface section.
  • the transition zone itself, the upper and/or the lower boundary are then each designed to be continuously differentiable.
  • the transition zone, the upper limit and/or the lower limit can be defined or realized by variable radii or by a function of the nth degree.
  • a continuously differentiable boundary is to be understood as meaning a smooth transition or a smooth (upper) surface without surface cracks, edges, kinks or the like.
  • a continuous casting mold according to the invention in particular a thin slab continuous casting mold according to claim 4 . It has two opposite broad side mold plates, of which at least one broad side mold plate is designed according to one of the configurations mentioned above.
  • the advantages mentioned above in relation to the broadside mold plate are correspondingly associated with the continuous casting mold.
  • the continuous casting mold can also have two corresponding, in particular identically designed, broadside mold plates.
  • the above-mentioned object is also achieved by a method according to the invention for producing a wide-side mold plate for a continuous casting mold according to claim 5 .
  • the advantages mentioned above in relation to the wide-side mold plate are correspondingly associated with the method.
  • the wide side mold plate can be produced according to one of the configurations mentioned above using the method.
  • figure 1 shows a schematic and perspective representation of an exemplary embodiment of a wide-side mold plate 1 according to the invention, obliquely from above, for a continuous casting mold (not shown).
  • the broad side mold plate 1 has a contact surface 2 for contacting a molten metal (not shown) poured into the continuous casting mold and a cast strand (not shown) resulting therefrom.
  • a depression 3 is formed on the contact surface 2, which is arranged in a central area of the contact surface 2 with respect to a width direction of the contact surface 2 and has a depth T that continuously increases in the direction of an upper edge 4 of the contact surface 2 on the mold entry side.
  • the indentation 3 merges on both sides into a planar surface section 5 or 6 of the contact surface 2 in a continuously differentiable manner.
  • the two surface sections 5 and 6 are arranged in a common plane.
  • the depression 3 has a constant width B over its height L.
  • FIG. A further flat surface section 8 of the contact surface 2 is arranged between a lower edge 7 of the contact surface 2 on the mold outlet side and the depression 3 , which is arranged in the common plane of the flat surface sections 5 and 6 .
  • the depression 3 merges into the further surface section 8 in a continuously differentiable manner.
  • the coordinates y, x, z span a coordinate system as in figure 1 shown.
  • the function values of the function y and the depth of the indentation decrease continuously in the z direction until the indentation 3 merges at its lower end into the further flat lower surface section 8 in the lower transition.
  • this lower transition can also be smooth or rounded, ie in the form of a continuously differentiable Transition zone 10 may be formed.
  • a corresponding mathematical description of this smooth transition zone is not described by the area function mentioned above.
  • the transition zone 10 would then be delimited by an upper delimitation 12-o between the depression 3 and the transition zone 10 and a lower delimitation 12-u between the transition zone 10 and the further lower surface section 8.
  • the transition zone 10 itself, the upper and/or the lower delimitation 12-o, 12-u would then be continuously differentiable.
  • figure 2 shows a further schematic and perspective representation of in figure 1 shown wide side mold plate 1 from below diagonally.
  • Contour lines 9 are shown to clarify the shape of the depression 3 .
  • the lower Surface section 10 of the depression 3, i.e. the transition zone transitions at its upper limit continuously differentiably into the remaining surface section 11 of the depression above it and at its lower limit continuously differentiably into the lower flat surface section 8, with the upper and lower limits of the transition zone 10 being indicated by the curved lines 12-o and 12-u.
  • the surface section 10 is convexly curved; however, it can also be concavely curved or have a different functional design.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP22209681.0A 2021-12-23 2022-11-25 Plaque de lingotière à large face, lingotière de coulée continue et procédé de fabrication d'une plaque de lingotière à large face Pending EP4215296A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021215030.6A DE102021215030A1 (de) 2021-12-23 2021-12-23 Breitseitenkokillenplatte, Stranggießkokille und Verfahren zum Herstellen einer Breitseitenkokillenplatte

Publications (1)

Publication Number Publication Date
EP4215296A1 true EP4215296A1 (fr) 2023-07-26

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ID=84363202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22209681.0A Pending EP4215296A1 (fr) 2021-12-23 2022-11-25 Plaque de lingotière à large face, lingotière de coulée continue et procédé de fabrication d'une plaque de lingotière à large face

Country Status (2)

Country Link
EP (1) EP4215296A1 (fr)
DE (1) DE102021215030A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0149734A2 (fr) 1984-01-05 1985-07-31 Sms Schloemann-Siemag Aktiengesellschaft Lingotière pour la coulée continue d'un ruban d'acier
DE3907351A1 (de) 1989-03-08 1990-09-13 Schloemann Siemag Ag Kokille mit eingiesstrichter
EP0909597A1 (fr) 1997-10-14 1999-04-21 DANIELI & C. OFFICINE MECCANICHE S.p.A. Lingotière pour la coulée continue de brames minces
EP1002599A1 (fr) 1998-11-21 2000-05-24 SMS Demag AG Lingotière pour la coulée continue de métal
DE20102524U1 (de) * 2001-02-09 2001-07-12 Egon Evertz KG (GmbH & Co.), 42655 Solingen Stranggießkokille
KR20040059083A (ko) * 2002-12-27 2004-07-05 주식회사 포스코 박슬라브 연속주조용 깔대기형 주형
US6926067B1 (en) * 1998-01-27 2005-08-09 Km Europa Metal Ag Liquid-cooled casting die
CN101412080A (zh) 2008-08-10 2009-04-22 燕山大学 新型薄板坯漏斗形结晶器及其制造方法
US20100000704A1 (en) * 2006-08-05 2010-01-07 Hans Streubel Extrusion die for liquid metals, in particular for liquid

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0149734A2 (fr) 1984-01-05 1985-07-31 Sms Schloemann-Siemag Aktiengesellschaft Lingotière pour la coulée continue d'un ruban d'acier
DE3907351A1 (de) 1989-03-08 1990-09-13 Schloemann Siemag Ag Kokille mit eingiesstrichter
EP0909597A1 (fr) 1997-10-14 1999-04-21 DANIELI & C. OFFICINE MECCANICHE S.p.A. Lingotière pour la coulée continue de brames minces
US6926067B1 (en) * 1998-01-27 2005-08-09 Km Europa Metal Ag Liquid-cooled casting die
EP1002599A1 (fr) 1998-11-21 2000-05-24 SMS Demag AG Lingotière pour la coulée continue de métal
DE20102524U1 (de) * 2001-02-09 2001-07-12 Egon Evertz KG (GmbH & Co.), 42655 Solingen Stranggießkokille
KR20040059083A (ko) * 2002-12-27 2004-07-05 주식회사 포스코 박슬라브 연속주조용 깔대기형 주형
US20100000704A1 (en) * 2006-08-05 2010-01-07 Hans Streubel Extrusion die for liquid metals, in particular for liquid
CN101412080A (zh) 2008-08-10 2009-04-22 燕山大学 新型薄板坯漏斗形结晶器及其制造方法

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Owner name: SMS GROUP GMBH