EP0230886B1 - Ingot mould for continuous casting steel strip - Google Patents

Ingot mould for continuous casting steel strip Download PDF

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Publication number
EP0230886B1
EP0230886B1 EP87100221A EP87100221A EP0230886B1 EP 0230886 B1 EP0230886 B1 EP 0230886B1 EP 87100221 A EP87100221 A EP 87100221A EP 87100221 A EP87100221 A EP 87100221A EP 0230886 B1 EP0230886 B1 EP 0230886B1
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EP
European Patent Office
Prior art keywords
side walls
mould
region
pouring
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
EP87100221A
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German (de)
French (fr)
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EP0230886A3 (en
EP0230886A2 (en
Inventor
Hans Streubel
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
Original Assignee
SMS Schloemann Siemag AG
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Publication date
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Application filed by SMS Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Priority to AT87100221T priority Critical patent/ATE58854T1/en
Publication of EP0230886A2 publication Critical patent/EP0230886A2/en
Publication of EP0230886A3 publication Critical patent/EP0230886A3/en
Application granted granted Critical
Publication of EP0230886B1 publication Critical patent/EP0230886B1/en
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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
    • 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 steel strip with cooled broad side walls and narrow side walls, the wide side walls forming a funnel-shaped pouring area which is limited to only part of the mold height and which is reduced to the narrow sides and in the casting direction to the format of the cast strip and the broad side walls run to the side of the funnel-shaped pouring area, at a distance corresponding to the strip thickness, parallel to the respective narrow side wall, forming a parallel area starting from the pouring area.
  • the broad side walls form a funnel-shaped pouring area, which is reduced to the format of the cast strip in relation to the narrow side walls and in the casting direction by means of triangular transition surfaces.
  • the broad side walls run parallel to the respective narrow side wall at a distance corresponding to the strip thickness (DE-A-34 00 220).
  • the strand shell that forms within the pouring area is subject to a beige stress when edges are reduced from the funnel-shaped pouring area to the strip format by edges running at an acute angle to the pouring direction. To limit this stress, the forming angles are kept small in the known mold.
  • the object of the invention is to provide a breakthrough-resistant mold for casting steel strips, in which the reduction of the strand shell to the strip format for reducing strand shell stress, mold wear and the required pull-out force and for improving the melt distribution to the sides is more favorable.
  • the pouring area of the mold has square transition surfaces which merge along a vertical line into the lateral parallel region and along a horizontal line into the lower sections of the mold which determine the format.
  • the contour of the transition surfaces is formed by straight lines extending from the upper edge of the mold to the lower parallel region, which in their entirety result in the shape of the transition surfaces.
  • two opposite wide side walls 1, 2 and two narrow side walls 3, 4 arranged between parallel side regions of the wide side walls 1, 4 form the molding space.
  • the narrow side walls 3, 4, which are also cooled, can be adjusted by means of spindles 8 between the wide side walls 1, 2.
  • the broad side walls 1, 2 form an enlarged pouring area 9 in the middle thereof, into which a pouring pipe 10 which introduces the liquid steel projects during casting.
  • the strand shell 11 (FIG . 5) which solidifies in the pouring region 9 is brought to the strip format when it is lowered.
  • the lateral parts of the pouring area are designed as square transition surfaces 12 with the corner points A, B, C, D. The transition to the format-defining lower sections of the broad side walls takes place on the horizontal lines CD.
  • the contour of the transition surfaces 12 is formed by straight lines g which connect the points of the lines A-B and C-D lying one above the other and which depend on the position in one of e.g. 10 ° to 0 ° decreasing forming angle a (Fig. 5) to the format-determining lower part of the wide side walls 1, 2 are.
  • the opening angles (3 (FIG. 4)) of the pouring area decrease continuously in the casting direction and reach the value 0 on the line C-D.
  • the upper edge of the pouring area is partially curved in accordance with FIG. 4.
  • the quadrangular, transition surfaces 12 merge into the format-forming lower surfaces of the broad side walls 1, 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Coating With Molten Metal (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Emergency Lowering Means (AREA)
  • Ropes Or Cables (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Confectionery (AREA)

Abstract

A mold is provided for continuously casting strip metal in which the mold cavity is formed with a flared mouth the internal surfaces of which terminate at their lower end along a transversely extending line, and the reflex angles which the mold along that line at a maximum near the center line of the mold and gradually diminishing toward the side edges of the mold.

Description

Die Erfindung betrifft eine Kokille zum Stranggießen von Stahlband mit gekühlten Breitseitenwänden und Schmalseitenwänden, wobei die Breitseitenwände einen, nur auf einen Teil der Kokillenhöhe beschränkten, trichterförmigen Eingießbereich bilden, der zu den Schmalseiten und in Gießrichtung auf das Format des gegossenen Bandes reduziert ist und die Breitseitenwände seitlich des trichterförmigen Eingießbereichs in einem der Banddicke entsprechenden Abstand parallel bis zu der jeweiligen Schmalseitenwand unter Bildung eines jeweils vom Eingießbereich ausgehenden Parallelbereichs verlaufen.The invention relates to a mold for the continuous casting of steel strip with cooled broad side walls and narrow side walls, the wide side walls forming a funnel-shaped pouring area which is limited to only part of the mold height and which is reduced to the narrow sides and in the casting direction to the format of the cast strip and the broad side walls run to the side of the funnel-shaped pouring area, at a distance corresponding to the strip thickness, parallel to the respective narrow side wall, forming a parallel area starting from the pouring area.

Bei einer bekannten Kokille dieser Art bilden die Breitseitenwände einen trichterförmigen Eingießbereich, der zu den Schmalseitenwänden und in Gießrichtung mittels dreieckiger Übergangsflächen auf das Format des gegossenen Bandes reduziert ist. Seitlich des trichterförmigen Eingießbereichs verlaufen die Breitseitenwände in einem de Banddicke entsprechendem Abstand parallel bis zu der jeweiligen Schmalseitenwand (DE-A-34 00 220).In a known mold of this type, the broad side walls form a funnel-shaped pouring area, which is reduced to the format of the cast strip in relation to the narrow side walls and in the casting direction by means of triangular transition surfaces. To the side of the funnel-shaped pouring area, the broad side walls run parallel to the respective narrow side wall at a distance corresponding to the strip thickness (DE-A-34 00 220).

Die sich innerhalb des Eingießbereichs bildende Strangschale unterliegt bei der Reduzierung vom trichterförmigen Eingießbereich zum Bandformat einer Beigebeanspruchung über im spitzen Winkel zur Gießrichtung verlaufende Kanten. Zur Begrenzung dieser Beanspruchung sind bei der bekannten Kokille die Umformwinkel klein gehalten.The strand shell that forms within the pouring area is subject to a beige stress when edges are reduced from the funnel-shaped pouring area to the strip format by edges running at an acute angle to the pouring direction. To limit this stress, the forming angles are kept small in the known mold.

Aufgabe der Erfindung ist die Schaffung einer durchbruchsicheren Kokille zum Gießen von Stahlbländern, bei der sich die Reduzierung der Strangschale auf das Bandformat zur Verringerung von Strangschalenbeanspruchung, Kokillenverschleiß und erforderlicher Auszugskraft sowie zur Verbesserung der Schmelzenverteilung zu den Seiten, günstiger gestaltet.The object of the invention is to provide a breakthrough-resistant mold for casting steel strips, in which the reduction of the strand shell to the strip format for reducing strand shell stress, mold wear and the required pull-out force and for improving the melt distribution to the sides is more favorable.

Die gestellte Aufgabe wird nach der Erfindung dadurch gelöst, daß der Eingießbereich der Kokille viereckige Übergangsflächen aufweist, die entlang einer vertikalen Linie in den seitlichen Parallelbereich und entlang einer horizontalen Linie in die formatbestimmenden unteren Abschnitte der Kokille übergehen.The object is achieved according to the invention in that the pouring area of the mold has square transition surfaces which merge along a vertical line into the lateral parallel region and along a horizontal line into the lower sections of the mold which determine the format.

Dadurch werden die Biegedehnungen der Strangschale im Bereich der Übergangsflächen erheblich vermindert. Die neue Gestaltung ist strömungsgünstiger, so daß eine bessere Verteilung der Stahlschmelze in Richtung der Schmalseitenwände erreicht wird. Schließlich wird ein zu Oberflächenfehlern führendes Abheben der Strangschale von der Kokillenwand im Anschluß an die Biegung und im Übergangsbereich zu den seitlichen parallelen Abschnitten ausgeschlossen. Auf diese Weise wird die Möglichkeit geschaffen, auch schwierig zu vergießende Stahlsorten im dünnen Bandformat zu gießen.This considerably reduces the bending strains of the strand shell in the area of the transition surfaces. The new design is more streamlined, so that a better distribution of the molten steel in the direction of the narrow side walls is achieved. Finally, a lifting of the strand shell from the mold wall following the bend and in the transition region to the lateral parallel sections leading to surface defects is excluded. This creates the possibility of casting even difficult-to-cast steel types in thin strip format.

Gemäß einem weiteren Merkmal der Erfindung ist die Kontur der Übergangsflächen durch von der Kokillenoberkante bis zum unteren Parallelbereich verlaufende Geraden gebildet, die in ihrer Gesamtheit die Form der Übergangsflächen ergeben.According to a further feature of the invention, the contour of the transition surfaces is formed by straight lines extending from the upper edge of the mold to the lower parallel region, which in their entirety result in the shape of the transition surfaces.

Eine weitere Ausgestaltung ergibt sich aus Anspruch 3.A further embodiment results from claim 3.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigen

  • Fig. 1 eine Stranggießkokille für Stahlband im Längsschnitt gemäß der Linie I-I in Fig. 2,
  • Fig. 2 die Draufsicht der Stranggießkokille,
  • Fig. 3 die Innenansicht einer Breitseitenwand in Richtung der Linien 111-111 in Fig. 4 gesehen,
  • Fig. 4 eine Draufsicht des Eingießbereichs der Kokille, und
  • Fig. 5 einen Querschnitt der Kokille im Bereich der Übergangsflächen gemäß der Linie VI-VI in Figur 3.
In the drawing, an embodiment of the invention is shown. Show it
  • 1 is a continuous casting mold for steel strip in longitudinal section along the line II in Fig. 2,
  • 2 shows the top view of the continuous casting mold,
  • 3 shows the inside view of a broad side wall in the direction of lines 111-111 in FIG. 4,
  • Fig. 4 is a plan view of the pouring area of the mold, and
  • 5 shows a cross section of the mold in the area of the transition surfaces along the line VI-VI in FIG. 3.

Bei der dargestellten Stranggießkokille bilden zwei gegenüberliegende Breitseitenwände 1, 2 und zwei zwischen parallelen Seitenbereichen der Breitseitenwände 1, angeordnete Schmalseitenwände 3, 4 den Formraum. Zur Kühlung der Breitseitenwände 1, 2 sind diese mit Hohlräumen 5 versehen, denen Kühlmittelzu- und ableitungen 6, 7 zugeordnet sind. Die ebenfalls gekühlten Schmalseitenwände 3, 4 sind durch Spindeln 8 zwischen den Breitseitenwänden 1, 2 verstellbar.In the continuous casting mold shown, two opposite wide side walls 1, 2 and two narrow side walls 3, 4 arranged between parallel side regions of the wide side walls 1, 4 form the molding space. To cool the broad side walls 1, 2, these are provided with cavities 5, to which coolant supply and discharge lines 6, 7 are assigned. The narrow side walls 3, 4, which are also cooled, can be adjusted by means of spindles 8 between the wide side walls 1, 2.

Die Breitseitenwände 1, 2 formen zu ihrer Mitte einen erweiterten Eingießbereich 9 in dem beim Gießen ein den flüssigen Stahl einleitendes Gießrohr 10 hineinragt.The broad side walls 1, 2 form an enlarged pouring area 9 in the middle thereof, into which a pouring pipe 10 which introduces the liquid steel projects during casting.

Die im Eingießbereich 9 erstarrende Strangschale 11 (Fig. 5) wird beim Absenken auf das Bandformat gebracht. Um die dabei auftretenden Biegedehnungen der Strangschale 11 möglichst gering zu halten, sind die seitlichen Teile des Eingießbereichs als viereckige Übergangsflächen 12 mit den Eckpunkten A, B, C, D ausgebildet. Der Übergang auf die formatbestimmenden unteren Abschnitte der Breitseitenwände erfolgt an den horizontalen Linien C-D.The strand shell 11 (FIG . 5) which solidifies in the pouring region 9 is brought to the strip format when it is lowered. In order to keep the bending strains of the strand shell 11 as small as possible, the lateral parts of the pouring area are designed as square transition surfaces 12 with the corner points A, B, C, D. The transition to the format-defining lower sections of the broad side walls takes place on the horizontal lines CD.

Die Kontur der Übergangsflächen 12 wird durch Geraden g gebildet, die übereinander liegende Punkte der Linien A-B und C-D miteinander verbinden und die lageabhängig in einem von z.B. 10° auf 0° abnehmendem Umformwinkel a (Fig. 5) zu den formatbestimmenden unteren Teil der Breitseitenwände 1, 2 stehen.The contour of the transition surfaces 12 is formed by straight lines g which connect the points of the lines A-B and C-D lying one above the other and which depend on the position in one of e.g. 10 ° to 0 ° decreasing forming angle a (Fig. 5) to the format-determining lower part of the wide side walls 1, 2 are.

Bedingt durch die viereckige Gestaltung der Übergangsflächen 12 nehmen die Öffnungswinkel (3 (Fig. 4) des Eingießbereichs in Gießrichtung kontinuierlich ab und erreichen an der Linie C-D den Wert 0.Due to the quadrangular design of the transition surfaces 12, the opening angles (3 (FIG. 4)) of the pouring area decrease continuously in the casting direction and reach the value 0 on the line C-D.

Die Oberkante des Eingießbereichs ist gemäß Fig. 4 teilweise bogenförmig gestaltet.The upper edge of the pouring area is partially curved in accordance with FIG. 4.

Gemäß Fig. 5 gehen die viereckigen, Übergangsflächen 12 bogenförmig in die formatbildenden unteren Flächen der Breitseitenwände 1, 2 über.According to FIG. 5, the quadrangular, transition surfaces 12 merge into the format-forming lower surfaces of the broad side walls 1, 2.

Claims (3)

1. Mould for the continuous casting of steel strip with cooled wide side walls (1, 2) and narrow side walls (3, 4), wherein the wide side walls (1, 2) form a funnel-shaped pouring-in region (9) which is confined to only a part of the mould height and which towards the narrow sides (3, 4) and in pouring direction is reduced to the format of the cast strip, and laterally of the funnel-shaped pouring-in region (9) the wide side walls (1, 2) extend parallelly, at a spacing corresponding to the strip thickness, up to the respective narrow side wall (3, 4) with formation of a respective parallel region going out from the pouring-in region (9), characterised thereby that the pouring-in region (9) of the mould exhibits rectangular transfer surfaces (12) which along a vertical line (AC) go over into the lateral parallel region and along a horizontal line (CD) go over into the lower format-determining section of the mould.
2. Mould according to claim 1: characterised thereby that the contour of the transfer surfaces (12) is formed by straight lines (g) extending from the mould upper edge as far as the lower parallel region.
3. Mould according to claim 1, characterised thereby that the transfer surfaces (12) go over radiussed into the lateral and lower format-forming surfaces of the wide side walls (1, 2).
EP87100221A 1986-01-20 1987-01-09 Ingot mould for continuous casting steel strip Expired - Lifetime EP0230886B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87100221T ATE58854T1 (en) 1986-01-20 1987-01-09 MOLD FOR CONTINUOUS CASTING OF STEEL STRIP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3601501 1986-01-20
DE3601501A DE3601501C3 (en) 1986-01-20 1986-01-20 Mold for the continuous casting of steel strip

Publications (3)

Publication Number Publication Date
EP0230886A2 EP0230886A2 (en) 1987-08-05
EP0230886A3 EP0230886A3 (en) 1987-12-16
EP0230886B1 true EP0230886B1 (en) 1990-12-05

Family

ID=6292198

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87100221A Expired - Lifetime EP0230886B1 (en) 1986-01-20 1987-01-09 Ingot mould for continuous casting steel strip

Country Status (17)

Country Link
US (1) US4721151A (en)
EP (1) EP0230886B1 (en)
JP (1) JPH0790331B2 (en)
KR (1) KR950014346B1 (en)
CN (1) CN1006206B (en)
AT (1) ATE58854T1 (en)
BR (1) BR8700219A (en)
CA (1) CA1268314A (en)
DD (1) DD253198A5 (en)
DE (2) DE3601501C3 (en)
ES (1) ES2023121B3 (en)
GR (1) GR3001401T3 (en)
IN (1) IN169294B (en)
MX (1) MX163639B (en)
SU (1) SU1558293A3 (en)
UA (1) UA6338A1 (en)
ZA (1) ZA87222B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3640525C2 (en) * 1986-11-27 1996-02-15 Schloemann Siemag Ag Mold for the continuous casting of steel strip
DE3723857A1 (en) * 1987-07-18 1989-01-26 Schloemann Siemag Ag CHOCOLATE FOR VERTICAL STEEL STRIP CASTING
GB8814331D0 (en) 1988-06-16 1988-07-20 Davy Distington Ltd Continuous casting of steel
DE4131829C2 (en) * 1990-10-02 1993-10-21 Mannesmann Ag Liquid-cooled mold for the continuous casting of steel strands in slab format
US5279354A (en) * 1990-11-30 1994-01-18 Acutus Industries, Inc. Method of continuous casting with changing of slab width
IT1252991B (en) * 1991-10-31 1995-07-10 Danieli Off Mecc CONTINUOUS CASTING CRYSTALIZER FOR TONGUE FOR THIN SLABS
IT1252990B (en) * 1991-10-31 1995-07-10 Danieli Off Mecc LONGITUDINAL BENDING CRYSTALLIZER FOR CONTINUOUS CASTING CURVE FOR THIN BRANKS
DE4424600A1 (en) * 1994-07-13 1996-01-18 Eko Stahl Gmbh Mould for continuous casting of thin slabs
US5850871A (en) * 1996-04-04 1998-12-22 Ag Industries, Inc. Foot guide and control system for continuous casting machine
DE19853738A1 (en) * 1998-11-21 2000-05-25 Schloemann Siemag Ag Mold for the continuous casting of metal
US6419005B1 (en) * 2000-06-29 2002-07-16 Vöest-Alpine Services and Technologies Corporation Mold cassette and method for continuously casting thin slabs

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE887990C (en) * 1951-05-07 1953-08-27 Irving Rossi Water-cooled continuous casting mold
GB1199805A (en) * 1967-04-20 1970-07-22 British Iron Steel Research Continuous Casting
JPS59165748U (en) * 1983-04-23 1984-11-07 日本鋼管株式会社 Mold for round billet continuous casting machine
DE3400220A1 (en) * 1984-01-05 1985-07-18 SMS Schloemann-Siemag AG, 4000 Düsseldorf CHOCOLATE FOR CONTINUOUSLY STEEL STRIP
AT379093B (en) * 1984-02-16 1985-11-11 Voest Alpine Ag CONTINUOUS CHOCOLATE FOR A CONTINUOUS CASTING SYSTEM

Also Published As

Publication number Publication date
MX163639B (en) 1992-06-10
KR870006938A (en) 1987-08-13
KR950014346B1 (en) 1995-11-25
ES2023121B3 (en) 1992-01-01
EP0230886A3 (en) 1987-12-16
ATE58854T1 (en) 1990-12-15
JPS62220249A (en) 1987-09-28
CA1268314A (en) 1990-05-01
JPH0790331B2 (en) 1995-10-04
DE3601501A1 (en) 1987-07-23
IN169294B (en) 1991-09-21
CN87100575A (en) 1987-08-19
BR8700219A (en) 1987-12-01
EP0230886A2 (en) 1987-08-05
DD253198A5 (en) 1988-01-13
CN1006206B (en) 1989-12-27
DE3766503D1 (en) 1991-01-17
DE3601501C3 (en) 2000-10-05
ZA87222B (en) 1987-08-26
UA6338A1 (en) 1994-12-29
GR3001401T3 (en) 1992-09-25
SU1558293A3 (en) 1990-04-15
US4721151A (en) 1988-01-26
DE3601501C2 (en) 1995-04-27

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