EP0904873B2 - Moule en forme d'entonnoir pour coulée continue de metal - Google Patents

Moule en forme d'entonnoir pour coulée continue de metal Download PDF

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Publication number
EP0904873B2
EP0904873B2 EP98117587A EP98117587A EP0904873B2 EP 0904873 B2 EP0904873 B2 EP 0904873B2 EP 98117587 A EP98117587 A EP 98117587A EP 98117587 A EP98117587 A EP 98117587A EP 0904873 B2 EP0904873 B2 EP 0904873B2
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EP
European Patent Office
Prior art keywords
chill mould
side walls
sections
concave
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.)
Expired - Lifetime
Application number
EP98117587A
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German (de)
English (en)
Other versions
EP0904873A1 (fr
EP0904873B1 (fr
Inventor
Jürgen Dr.-Ing. Sucker
Holger Dr.-Ing. Beyer-Steinhauer
Romeo Ing. Capotosti
Alessandro Dipl.-Ing. Cristallini
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 Siemag AG En Acciai Speciali Terni SpA
Original Assignee
SMS Siemag AG
Acciai Speciali Terni SpA
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Publication date
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Application filed by SMS Siemag AG, Acciai Speciali Terni SpA filed Critical SMS Siemag AG
Publication of EP0904873A1 publication Critical patent/EP0904873A1/fr
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Publication of EP0904873B1 publication Critical patent/EP0904873B1/fr
Publication of EP0904873B2 publication Critical patent/EP0904873B2/fr
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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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0406—Moulds with special profile
    • 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

Definitions

  • the invention relates to a mold for the continuous casting of metal with a cooled Breitrate- and narrow side walls having funnel-shaped in the casting direction to the format of the cast strand tapered Eingello Symposium.
  • the dimensions of the pouring area are determined essentially by the cross section of the strand to be cast, the dimensions of the pouring tube and its immersion depth in the melt.
  • the strand shell Due to the funnel-shaped shaping of the broad side walls not only a taper, but also a change in shape of the strand cross-section takes place in the casting direction. As a result, in contrast to a conventional continuous casting mold with flat walls, the strand shell is forced through additional deformations when passing through a funnel mold. In order to prevent the formation of surface defects of the cast product, these additional deformations must not exceed a certain limit, so that the strand shell is not overloaded and ensures a uniform over the strand cross-section heat dissipation.
  • the EP 0 268 910 B1 proposes that the strand shell, which is still thin below the casting level, be guided without deformation, in that the broad side walls run essentially parallel to one another in a first section in the pouring region and are returned to the thickness of the casting format in an adjoining section, the first section reaching below the first in the casting operation to be set Gitty Spiegelebene in the range of the first strand shell formation ranges.
  • the entire strain imposed by the mold on the strand which is required for the reduction of the strand to the thickness of the casting mold, extends to the subsequent section, which is formed by inclined or curved surfaces or combination thereof.
  • the EP 0 552 501 A2 discloses a mold for continuous casting of steel strip, in which the wide side walls form a funnel-shaped Eingello Scheme which is reduced to the narrow side walls and in the casting direction on the format of the cast strip.
  • the curvature of the funnel-shaped Eingello Schemees is determined by lateral arcs and at tangent points with these associated central circular arcs.
  • the radii of the lateral arcs are formed in a constant at least 100 mm from the mold top edge downwardly extending portion.
  • the DE 39 07 351 A1 discloses a proposal to form the pouring funnel of a mold so that the deformation of the metal casting is distributed over a maximum distance and constrictions and cracks in the strand shell of Metallg screensstranges be avoided. This is achieved in that the contour of the inner wall of the pouring funnel is formed in the strand passage direction by three tangentially touching circular arcs whose radii, gradually increasing in strand passage direction, pass into the contour of the inner wall of the mold. The most uniform possible distribution of the change in shape of the strand shell in such a molded Eing man Silverbrook is achieved in that increase their radii in the strand passage direction with the same or unequal factor.
  • the present invention seeks to provide a further funnel geometry of a mold, by which friction and wear between strand shell and mold walls even better reduced and especially in the strand shell formation of a relatively high shrinkage prone steel an even clearer reduction of error the slab surface is realized as a result of a uniform as possible adjustment of the change in shape.
  • the invention is based on the finding that in the pouring region the change in length of the mold contour caused by the transition from a horizon to an underlying horizon has a maximum on each horizon and that this maximum is an above-average local deformation or increased tendency to local gap formation between strand and mold wall equivalent. It follows that the Eing sheet Silverbrook has at least a maximum of the change in length of the horizontal Kokillenkontur and that the most uniform distribution of the change in shape over the Eing devis Anlagen is achieved in that this maximum is minimized.
  • the inner contours of the broad side walls in the casting direction from top to bottom at least two points with the property that they determine a straight line along which the inner contours of these broad side walls with at least one concave and are formed at least a convex portion of any sequence.
  • the inner contours of the broad side walls along a straight line drawn from the upper mold edge to Kokillenunterkante straight in the casting direction from top to bottom are formed with at least one concave portion and at least one convex portion.
  • the object is achieved with the invention also in that in the funnel area, the inner contours of the broad side walls along a top edge and the beginning of the lower vertical portion of the broad side walls connecting straight lines in the casting direction from top to bottom with at least one concave portion and at least one convex portion are formed.
  • concave sections and convex sections of the broad side walls can merge into one another directly.
  • each of the concave sections or the convex sections of the broad side walls may advantageously have both a constant as well as a variable curvature in the course thereof.
  • An embodiment of the invention provides that the inner contours of the broad side walls on the concave or on the convex portions have a circular arc shape or a trigonometric, for example, a sinusoidal shape.
  • funnel geometry results from the measure that the curvatures of the individual sections of the broad side walls are formed with such radii that the largest local change in length delta max (% / m) at the transition from a horizon to an underlying horizon four times the value over the funnel area without taking account of parallel-walled sections averaged local length changes, in particular a value of 2.0% / m does not exceed.
  • the invention provides a use of the claimed mold for the continuous casting of relatively to extremely high shrinkage prone to peritectic carbon steels and austenitic stainless steels.
  • Fig. 1 three different funnel contours of the broad side wall of a mold have a funnel-shaped in the casting direction to the format of the cast strand tapered Eingello Club A or a funnel-shaped in the casting direction to the format of the cast strand tapered Eingello Club B and a subsequent substantially parallelwandigen area C.
  • This Kokillen Scheme or Kokillenaustritt must not have parallel exit surfaces or exit edges.
  • the lower mold area or the lower Kokillenauscher may well have a small curvature of 1 to 15 mm per broad side wall in the central region.
  • the funnel contours of the broad side walls 4 are formed from top to bottom along a straight line connecting the upper mold edge 1 and the lower mold edge 3, first with a concave portion a and subsequently with a convex portion b. It can be seen that the inner contour 4 of the broad side walls has a sinusoidal profile over the sections a and b.
  • the funnel contours of the broad side walls 4 'and 4''along a top edge 1 and the beginning of the parallel-walled area 2 connecting straight line from top to bottom first with a concave section a' and a '' and then with a convex portion b 'and b''andc''formed.
  • the inner contours 4 'and 4 "of the broad side walls have a sinusoidal profile over the sections a' and b 'or a" and b ".
  • Fig. 1 also shows that the convex portion b '' with a terminal lower circular arc c '' in the parallel-walled portion d '' merges with a steady course.
  • Essential for the funnel geometry is also the measure that each of the concave sections a, a 'and a''and the convex sections b, b' and b '' both a constant in their course, as well as have a variable curvature.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Crushing And Grinding (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Claims (7)

  1. Lingotière pour la coulée continue de métal avec une zone d'introduction de coulée présentant des parois des côtés larges et des côtés étroits refroidies, s'amincissant en forme d'entonnoir dans le sens de la coulée au format du brin coulé, où, dans la zone de l'entonnoir, les contours internes des parois des côtés larges dans le sens de la coulée présentent, du haut vers le bas, à chaque fois au moins deux points qui présentent comme propriété qu'ils déterminent une droite le long de laquelle les contours internes des parois des côtés larges sont exécutés avec au moins une section concave et au moins une section convexe, dans un ordre quelconque, caractérisée
    en ce que, dans la zone de l'entonnoir, les contours internes (4, 4', 4") des parois des côtés larges sont réalisés, le long d'une droite reliant le côté supérieur (1) et le côté inférieur (3) de la lingotière ou le long d'une droite reliant le côté supérieur (1) de la lingotière et le début (2) d'une section verticale (d' ou d") inférieure, dans le sens de la coulée, du haut vers le bas, d'abord avec une section concave (a, a', a") puis, consécutivement, avec une section convexe (b, b', b" et c"),
    où, en vue de la répartition régulière de la modification de la forme sur la zone d'introduction de coulée, la modification maximale de la forme est égale ou essentiellement égale dans tous les sens horizontaux de la moitié supérieure de la lingotière, également au niveau du côté supérieur de la lingotière, où la formation de la croûte du brin est la plus sensible.
  2. Lingotière selon la revendication 1, caractérisée
    en ce que les sections concaves (a, a', a") et les sections convexes (b, b', b") passent l'une dans l'autre directement ou avec un contour intermédiaire.
  3. Lingotière selon la revendication 1 ou 2, caractérisée
    en ce que les contours internes (4, 4', 4") des parois des côtés larges présentent au moins sur une ou plusieurs zones partielles (a, b, a', b', a", b", c") une allure en arc de cercle ou une allure trigonométrique, telle que par exemple une allure sinusoïdale.
  4. Lingotière selon au moins l'une quelconque des revendications précédentes 1 à 3, caractérisée
    en ce que la section inférieure convexe/concave (b") des parois des côtés larges passe, avec un arc de cercle terminal (c") dans la section (d") inférieure, de préférence à paroi parallèle, avec une allure continue.
  5. Lingotière selon au moins l'une quelconque des revendications précédentes 1 à 4, caractérisée
    en ce que chaque section concave (a, a', a") et section convexe (b, b', b", c") présente une courbure restant constante dans son allure ainsi qu'une courbure variable.
  6. Lingotière selon au moins l'une quelconque des revendications précédentes 1 à 5, caractérisée
    en ce que les courbures des sections (a, b, a', b', a", b", c") sont exécutées avec des rayons tels que la modification locale de longueur la plus grande (Deltamax) lors du passage d'une horizontale sur une horizontale inférieure ne dépasse pas le quadruple des modifications de longueur locales moyennes sur la zone de l'entonnoir sans tenir compte des sections à parois parallèles (d' et d"), en particulier une valeur de 2,0 %/m.
  7. Utilisation de la lingotière présentant une géométrie d'entonnoir selon les revendications 1 à 6 pour la coulée continue d'aciers au carbone péritectiques et d'aciers inoxydables austénitiques tendant à un retrait relativement extrêmement élevé
EP98117587A 1997-09-27 1998-09-16 Moule en forme d'entonnoir pour coulée continue de metal Expired - Lifetime EP0904873B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19742795A DE19742795A1 (de) 1997-09-27 1997-09-27 Trichtergeometrie einer Kokille zum Stranggießen von Metall
DE19742795 1997-09-27

Publications (3)

Publication Number Publication Date
EP0904873A1 EP0904873A1 (fr) 1999-03-31
EP0904873B1 EP0904873B1 (fr) 2002-07-03
EP0904873B2 true EP0904873B2 (fr) 2011-10-26

Family

ID=7843886

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98117587A Expired - Lifetime EP0904873B2 (fr) 1997-09-27 1998-09-16 Moule en forme d'entonnoir pour coulée continue de metal

Country Status (10)

Country Link
US (1) US6186220B1 (fr)
EP (1) EP0904873B2 (fr)
JP (1) JP4289702B2 (fr)
KR (1) KR100594624B1 (fr)
CN (1) CN1106238C (fr)
AT (1) ATE219976T1 (fr)
DE (2) DE19742795A1 (fr)
ES (1) ES2183267T5 (fr)
TW (1) TW380064B (fr)
ZA (1) ZA988657B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100490985B1 (ko) * 2000-11-25 2005-05-24 주식회사 포스코 연속주조용 깔대기형 주형동판
WO2002064286A2 (fr) * 2001-02-09 2002-08-22 Egon Evertz K.G. (Gmbh & Co) Coquille pour coulee continue
DE10106328A1 (de) * 2001-02-09 2002-08-14 Evertz Egon Kg Gmbh & Co Stranggießkokille
AT410766B (de) * 2001-09-28 2003-07-25 Voest Alpine Ind Anlagen Durchlaufkokille
US6975877B1 (en) 2001-10-17 2005-12-13 Cisco Technology, Inc. System and method for synchronizing clock dividers in a wireless network
KR100940679B1 (ko) * 2002-12-27 2010-02-08 주식회사 포스코 박슬라브 연속주조용 깔대기형 주형
CN1292858C (zh) * 2004-01-17 2007-01-03 宝山钢铁股份有限公司 一种水冷的金属连铸结晶器
JP5018274B2 (ja) * 2007-06-28 2012-09-05 住友金属工業株式会社 丸ビレット鋳片の連続鋳造用鋳型および連続鋳造方法
SG2012079117A (en) 2012-10-24 2014-05-29 Pratt & Whitney Services Pte Ltd Casting funnel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0865849A1 (fr) † 1997-03-17 1998-09-23 Sms Schloemann-Siemag Aktiengesellschaft Lingotière oscillante pour la coulée continue de brames
WO1999001244A1 (fr) † 1997-06-30 1999-01-14 Sms Demag Ag Procede et dispositif pour la production de brames minces

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH617608A5 (fr) * 1977-04-06 1980-06-13 Concast Ag
FR2583662B1 (fr) * 1985-06-25 1987-09-25 Clecim Sa Procede et machine de coulee continue d'un produit metallique mince
DE3640525C2 (de) * 1986-11-27 1996-02-15 Schloemann Siemag Ag Kokille zum Stranggießen von Stahlband
JPH02207945A (ja) * 1989-02-08 1990-08-17 Sumitomo Metal Ind Ltd 丸型鋳片の連続鋳造用モールド
DE3907351C2 (de) 1989-03-08 1998-09-24 Schloemann Siemag Ag Eingießtrichter einer Kokille
FR2645463B1 (fr) * 1989-04-06 1991-05-31 Techmetal Promotion Procede et installation de coulee de produits metalliques minces
JPH02284747A (ja) * 1989-04-24 1990-11-22 Sumitomo Metal Ind Ltd 連続鋳造用モールド
JPH04172153A (ja) * 1990-11-06 1992-06-19 Kawatetsu Techno Res Corp 連続鋳造方法及びその装置
DE4201363C2 (de) 1992-01-20 2000-08-10 Sms Demag Ag Kokille zum Stranggießen von Stahlband
JP2972051B2 (ja) * 1993-04-15 1999-11-08 住友重機械工業株式会社 鋼の連続鋳造用鋳型および連続鋳造方法
IT1267244B1 (it) * 1994-05-30 1997-01-28 Danieli Off Mecc Procedimento di colata continua per acciai ad alto contenuto di carbonio
IT1267243B1 (it) * 1994-05-30 1997-01-28 Danieli Off Mecc Procedimento di colata continua per acciai peritettici
US5927378A (en) * 1997-03-19 1999-07-27 Ag Industries, Inc. Continuous casting mold and method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0865849A1 (fr) † 1997-03-17 1998-09-23 Sms Schloemann-Siemag Aktiengesellschaft Lingotière oscillante pour la coulée continue de brames
WO1999001244A1 (fr) † 1997-06-30 1999-01-14 Sms Demag Ag Procede et dispositif pour la production de brames minces

Also Published As

Publication number Publication date
JPH11156488A (ja) 1999-06-15
DE19742795A1 (de) 1999-04-01
EP0904873A1 (fr) 1999-03-31
KR100594624B1 (ko) 2006-08-30
ES2183267T3 (es) 2003-03-16
CN1220195A (zh) 1999-06-23
JP4289702B2 (ja) 2009-07-01
DE59804640D1 (de) 2002-08-08
ATE219976T1 (de) 2002-07-15
TW380064B (en) 2000-01-21
US6186220B1 (en) 2001-02-13
KR19990030178A (ko) 1999-04-26
CN1106238C (zh) 2003-04-23
EP0904873B1 (fr) 2002-07-03
ES2183267T5 (es) 2012-01-24
ZA988657B (en) 1999-06-04

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