EP0552501B1 - Mould for continuous casting steel strip - Google Patents

Mould for continuous casting steel strip Download PDF

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Publication number
EP0552501B1
EP0552501B1 EP92122119A EP92122119A EP0552501B1 EP 0552501 B1 EP0552501 B1 EP 0552501B1 EP 92122119 A EP92122119 A EP 92122119A EP 92122119 A EP92122119 A EP 92122119A EP 0552501 B1 EP0552501 B1 EP 0552501B1
Authority
EP
European Patent Office
Prior art keywords
side walls
region
radii
arcs
steel strip
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
EP92122119A
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German (de)
French (fr)
Other versions
EP0552501A2 (en
EP0552501A3 (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
Schloemann Siemag AG
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Application filed by SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0552501A2 publication Critical patent/EP0552501A2/en
Publication of EP0552501A3 publication Critical patent/EP0552501A3/xx
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Publication of EP0552501B1 publication Critical patent/EP0552501B1/en
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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
    • B22D11/0408—Moulds for casting thin slabs

Definitions

  • the invention relates to a mold for the continuous casting of steel strip or thin slabs with cooled broad side walls and narrow side walls, the wide side walls forming a funnel-shaped pouring area which is reduced to the narrow side walls and in the casting direction to the format of the cast strip and on each broad side wall the curvature of the pouring area by lateral Circular arcs and central arcs connected to them at tangent points are determined, the radii of which gradually increase with their distance from the upper edge of the mold.
  • the curvature of the broad side walls forming the pouring area is designed in the form of an arc of a circle such that both the radii of the lateral arcs and the radii of the central arcs gradually increase in the direction of the strand.
  • the strand shell that forms immediately below the casting level is continuously deformed up to the end of the pouring area due to the change in radius of the arcs. The deformation increases the friction between the strand shell and the broad side wall and thus the tensile stress on the strand shell.
  • EP-B1 02 68 910 discloses a mold with an enlarged pouring area, a first section of the pouring area being used to reduce the strain on the strand shell the broad side wall is parallel-walled, resulting in opposite deformations.
  • the object of the invention is to provide a mold of the type specified, the curvature of the broad side walls determined by an arc being designed in such a way that friction and wear on the broad side walls are reduced and the tensile and bending stress on the strand shell is reduced in such a way that the operational reliability of the casting process is increased and a flawless steel strip is produced.
  • the invention is based on the idea of creating deformation-free arch areas on the broad side walls.
  • the radii of the lateral arcs from the upper mold edge are constant in a portion of the pouring area which extends at least 100 mm down from the upper mold edge.
  • a further enlargement of the deformation-free arch areas is achieved in that the radii of the lateral arcs are the same over the entire height of the pouring area.
  • a steel strip casting mold consists of two broad side walls 1, 2 and two narrow side walls 3, 4 arranged laterally between the wide side walls 1, 2.
  • the wide side walls 1, 2 each form a pouring area 5 through an upper bulge, which leads to the narrow side walls 3 , 4 and in the casting direction to the thickness of the cast steel strip 6 is reduced.
  • the shape of the pouring area 5 is determined by lateral arches and middle arches, the radii of curvature R s and R m of which increase uniformly in the casting direction.
  • the tangent or turning points T of successive arcs R s and R m form straight lines 7. Due to the successive enlargement of the radii R s and R m , the strand shell of the cast steel strip 6 becomes on the entire surface of the pouring area 5 deformed.
  • FIG 3 shows a side of a pouring area 8 shaped according to the invention with lateral and inner arches in planes I, II, III.
  • the radii R mI , R mII , R mIII of the middle arcs are evenly larger from top to bottom.
  • the radii R sI and R sII of the lateral arches remain the same up to level II and increase evenly from level II to the end of the pouring area 8. This results in a lateral displacement of the tangent or turning points T I , T II up to level II .
  • Fig. 5 shows one side of an alternatively shaped pouring area 11 with side and middle arches in the levels IV, V, VI.
  • the radii R mIV , R mV , R mVI of the middle arches are evenly enlarged from top to bottom.
  • the radii R sIV , R sV , R sVI of the side arches are the same across all levels IV, V, VI. This results in a lateral displacement of the tangent or turning points T IV , T V , T VI over the entire height of the pouring area 11.
  • lines 12 are shown as geometric locations of the tangent points T IV , T V T VI .
  • the strand shell of the cast steel strip 6 is advantageously not deformed.

Abstract

With a mould for the continuous casting of steel strip or thin slabs with cooled broad-side walls (1, 2) and narrow-side walls (3, 4), the broad-side walls form a funnel-shaped pour-in region (5, 8) which is reduced towards the narrow-side walls (3, 4) and in the casting direction to the format of the cast strip (6). The curvature of the pour-in region (5, 8) is defined by lateral circular arcs Rs and central circular arcs Rm connected to the latter at tangential points T. <??>To reduce friction and wear and to reduce the tensile and bending load on the strand shell, the radii (RsI - II) of the lateral circular arcs from the mould top edge are constant in a section (10) of the pour-in region (5, 8) extending from a point at least 100 mm down from the mould top edge. <IMAGE>

Description

Die Erfindung betrifft eine Kokille zum Stranggießen von Stahlband oder Dünnbrammen mit gekühlten Breitseitenwänden und Schmalseitenwänden, wobei die Breitseitenwände einen trichterförmigen Eingießbereich bilden, der zu den Schmalseitenwänden und in Gießrichtung auf das Format des gegossenen Bandes reduziert ist und an jeder Breitseitenwand die Wölbung des Eingießbereichs durch seitliche Kreisbögen und an Tangentpunkten mit diesen verbundene mittlere Kreisbögen bestimmt ist, deren Radien mit ihrem Abstand von der Kokillenoberkante suksessive größer werden.The invention relates to a mold for the continuous casting of steel strip or thin slabs with cooled broad side walls and narrow side walls, the wide side walls forming a funnel-shaped pouring area which is reduced to the narrow side walls and in the casting direction to the format of the cast strip and on each broad side wall the curvature of the pouring area by lateral Circular arcs and central arcs connected to them at tangent points are determined, the radii of which gradually increase with their distance from the upper edge of the mold.

Bei dieser durch die DE-A1 39 07 351 bekannten Kokille ist die den Eingießbereich bildende Wölbung der Breitseitenwände derart kreisbogenförmig gestaltet, daß sowohl die Radien der seitlichen Kreisbögen als auch die Radien der mittleren Kreisbögen in Stranglaufrichtung allmählich größer werden. An derartigen Wölbungen wird die sich unmittelbar unterhalb des Gießspiegels bildende Strangschale aufgrund der Radienänderung der Kreisbögen stetig bis zum Ende des Eingießbereichs verformt. Durch die Verformung wird die Reibung zwischen Strangschale und Breitseitenwand und damit die Zugbeanspruchung der Strangschale erhöht.In this mold known from DE-A1 39 07 351, the curvature of the broad side walls forming the pouring area is designed in the form of an arc of a circle such that both the radii of the lateral arcs and the radii of the central arcs gradually increase in the direction of the strand. At such arches, the strand shell that forms immediately below the casting level is continuously deformed up to the end of the pouring area due to the change in radius of the arcs. The deformation increases the friction between the strand shell and the broad side wall and thus the tensile stress on the strand shell.

Durch die EP-B1 02 68 910 ist eine Kokille mit erweitertem Eingießbereich bekannt, wobei zur Reduzierung der Strangschalenbelastung ein erster Abschnitt des Eingießbereichs der Breitseitenwand parallelwandig ist, wobei sich entgegengesetzte Verformungen ergeben.EP-B1 02 68 910 discloses a mold with an enlarged pouring area, a first section of the pouring area being used to reduce the strain on the strand shell the broad side wall is parallel-walled, resulting in opposite deformations.

Aufgabe der Erfindung ist die Schaffung einer Kokille der angegebenen Gattung, wobei die durch Kreisbogen bestimmte Wölbung der Breitseitenwände derart gestaltet ist, daß Reibung und Verschleiß an den Breitseitenwänden vermindert und die Zug- und Biegebeanspruchung der Strangschale derart reduziert wird, daß die Betriebssicherheit des Gießvorganges erhöht und ein fehlerfreies Stahlband erzeugt wird.The object of the invention is to provide a mold of the type specified, the curvature of the broad side walls determined by an arc being designed in such a way that friction and wear on the broad side walls are reduced and the tensile and bending stress on the strand shell is reduced in such a way that the operational reliability of the casting process is increased and a flawless steel strip is produced.

Der Erfindung liegt der Gedanke zugrunde, an den Breitseitenwänden verformungsfreie Wölbungsbereiche zu schaffen.The invention is based on the idea of creating deformation-free arch areas on the broad side walls.

Erfindungsgemäß wird vorgeschlagen, daß die Radien der seitlichen Kreisbögen von der Kokillenoberkante in einem mindestens 100 mm von der Kokillenoberkante abwärts reichenden Abschnitt des Eingießbereichs gleichbleibend sind.It is proposed according to the invention that the radii of the lateral arcs from the upper mold edge are constant in a portion of the pouring area which extends at least 100 mm down from the upper mold edge.

Dadurch wird erreicht, daß die noch dünne Strangschale unterhalb des Gießspiegels zu einem größeren Flächenanteil verformungsfrei geführt wird.It is thereby achieved that the still thin strand shell below the casting level is guided to a larger area without deformation.

Eine weitere Vergrößerung der verformungsfreien Wölbungsbereiche wird dadurch erreicht, daß die Radien der seitlichen Kreisbögen über die gesamte Höhe des Eingießbereichs gleich sind.A further enlargement of the deformation-free arch areas is achieved in that the radii of the lateral arcs are the same over the entire height of the pouring area.

In der Zeichnung sind Ausführungsbeispiele mit Merkmalen und Vorteilen der Erfindung dargestellt. Es Zeigen

Fig. 1
die Innenansicht einer bekannten Kokillenbreitseitenwand mit seitlich vorgeordneten Schmalseitenwänden,
Fig. 2
die Draufsicht einer Stahlbandgießkokille,
Fig. 3
eine Seite eines erfindungsgemäßen Eingießbereichs in Draufsicht,
Fig. 4
die Innenansicht einer gemäß Fig. 3 gestalteten Breitseitenwand,
Fig. 5
eine Seite eines alternativ gestalteten Eingießbereichs in Draufsicht
und
Fig. 6
die Innenansicht einer gemäß Fig. 5 gestalteten Breitseitenwand.
In the drawing there are exemplary embodiments with features and advantages of the invention. Show it
Fig. 1
the inside view of a known mold broad side wall with laterally arranged narrow side walls,
Fig. 2
the top view of a steel strip casting mold,
Fig. 3
one side of a pouring area according to the invention in plan view,
Fig. 4
3 the inside view of a broad side wall designed according to FIG. 3,
Fig. 5
a side of an alternatively designed pouring area in plan view
and
Fig. 6
the inside view of a broad side wall designed according to FIG. 5.

Eine Stahlbandgießkokille besteht gemäß den Figuren 1 und 2 aus zwei Breitseitenwänden 1, 2 und zwei seitlich zwischen den Breitseitenwänden 1, 2 angeordneten Schmalseitenwänden 3, 4. Die Breitseitenwänden 1, 2 bilden durch je eine obere Auswölbung einen Eingießbereich 5, der zu den Schmalseitenwänden 3, 4 und in Gießrichtung auf die Dicke des gegossenen Stahlbandes 6 reduziert ist.According to FIGS. 1 and 2, a steel strip casting mold consists of two broad side walls 1, 2 and two narrow side walls 3, 4 arranged laterally between the wide side walls 1, 2. The wide side walls 1, 2 each form a pouring area 5 through an upper bulge, which leads to the narrow side walls 3 , 4 and in the casting direction to the thickness of the cast steel strip 6 is reduced.

Die Form des Eingießbereichs 5 ist durch seitlichen Bögen und mittlere Bögen bestimmt, deren Krümmungsradien Rs und Rm in Gießrichtung gleichmäßig zunehmen. Bei dieser in Fig. 1 dargestellten bekannten Ausführung bilden die Tangent- oder Wendepunkte T aufeinanderfolgender Bögen Rs und Rm Geraden 7. Aufgrund der sukzessiven Vergrößerung der Radien Rs und Rm wird die Strangschale des gegossenen Stahlbandes 6 an der gesamte Fläche des Eingießbereichs 5 verformt.The shape of the pouring area 5 is determined by lateral arches and middle arches, the radii of curvature R s and R m of which increase uniformly in the casting direction. In this known embodiment shown in FIG. 1, the tangent or turning points T of successive arcs R s and R m form straight lines 7. Due to the successive enlargement of the radii R s and R m , the strand shell of the cast steel strip 6 becomes on the entire surface of the pouring area 5 deformed.

In Fig. 3 ist eine Seite eines erfindungsgemäß geformten Eingießbereichs 8 mit seitlichen und inneren Bögen in den Ebenen I, II, III dargestellt. Dabei werden die Radien RmI, RmII, RmIII der mittleren Bögen gleichmäßig von oben nach unten größer. Die Radien RsI und RsII der seitlichen Bögen bleiben bis zur Ebene II gleich und nehmen von der Ebene II bis zum Ende des Eingießbereichs 8 gleichmäßig zu. Daraus ergibt sich bis zur Ebene II eine Seitenverlagerung der Tangent- oder Wendepunkte TI, TII.3 shows a side of a pouring area 8 shaped according to the invention with lateral and inner arches in planes I, II, III. The radii R mI , R mII , R mIII of the middle arcs are evenly larger from top to bottom. The radii R sI and R sII of the lateral arches remain the same up to level II and increase evenly from level II to the end of the pouring area 8. This results in a lateral displacement of the tangent or turning points T I , T II up to level II .

In der Innenansicht gemäß Fig. 4 sind abgeknickte Linien 9 als geometrischer Ort der Tangent- oder Wendepunkte TI, TII, TIII dargestellt. Auf diese Weise wird eine Zone 10 gebildet, in der die Strangschale des gegossenen Stahlbandes 6 vorteilhaft nicht verformt wird.4 kinked lines 9 are shown as the geometric location of the tangent or turning points T I , T II , T III . In this way, a zone 10 is formed in which the strand shell of the cast steel strip 6 is advantageously not deformed.

Fig. 5 zeigt eine Seite eines alternativ geformten Eingießbereichs 11 mit seitlichen und mittleren Bögen in den Ebenen IV, V, VI. Dabei sind die Radien RmIV, RmV, RmVI der mittleren Bögen gleichmäßig von oben nach unten vergrößert. Die Radien RsIV, RsV, RsVI der seitlichen Bögen sind über alle Ebenen IV, V, VI gleich. Daraus ergibt sich über die gesamte Höhe des Eingießbereichs 11 eine Seitenverlagerung der Tangent- oder Wendepunkte TIV, TV, TVI.Fig. 5 shows one side of an alternatively shaped pouring area 11 with side and middle arches in the levels IV, V, VI. The radii R mIV , R mV , R mVI of the middle arches are evenly enlarged from top to bottom. The radii R sIV , R sV , R sVI of the side arches are the same across all levels IV, V, VI. This results in a lateral displacement of the tangent or turning points T IV , T V , T VI over the entire height of the pouring area 11.

In der Innenansicht gemäß Fig. 6 sind Linien 12 als geometrische Orte der Tangentpunkte TIV, TV TVI dargestellt. In den Zonen 13 des Eingießbereichs 11 wird die Strangschale des gegossenen Stahlbandes 6 vorteilhaft nicht verformt.6, lines 12 are shown as geometric locations of the tangent points T IV , T V T VI . In zones 13 of the pouring area 11, the strand shell of the cast steel strip 6 is advantageously not deformed.

Claims (2)

  1. Chill mould for the continuous casting of steel strip or thin slabs with cooled wide side walls and narrow side walls, wherein the wide side walls form a funnel-shaped pouring-in region, which is reduced relative to the narrow side walls and in casting direction to the format of the cast strip and at each wide side wall the curvature of the pouring-in region is determined by lateral arcs and centre arcs connected therewith at points of tangency or inflection, the radii of which arcs are successively larger with their spacing from the chill mould upper edge, characterised thereby that the radii (RsI-II) of the lateral arcs from the chill mould upper edge are constant in a portion (10), which extends downwards at least 100 millimetres from the chill mould upper edge, of the pouring-in region (8).
  2. Chill mould according to claim 1, characterised thereby that the radii (RsIV-VI) of the lateral arcs are equal over the entire height of the pouring-in region (ii).
EP92122119A 1992-01-20 1992-12-30 Mould for continuous casting steel strip Expired - Lifetime EP0552501B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4201363A DE4201363C2 (en) 1992-01-20 1992-01-20 Mold for the continuous casting of steel strip
DE4201363 1992-01-20

Publications (3)

Publication Number Publication Date
EP0552501A2 EP0552501A2 (en) 1993-07-28
EP0552501A3 EP0552501A3 (en) 1995-02-22
EP0552501B1 true EP0552501B1 (en) 1997-05-14

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ID=6449855

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Application Number Title Priority Date Filing Date
EP92122119A Expired - Lifetime EP0552501B1 (en) 1992-01-20 1992-12-30 Mould for continuous casting steel strip

Country Status (7)

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US (1) US5311922A (en)
EP (1) EP0552501B1 (en)
JP (1) JP3140592B2 (en)
AT (1) ATE152938T1 (en)
CA (1) CA2087314A1 (en)
DE (2) DE4201363C2 (en)
ES (1) ES2101793T3 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0659503A2 (en) * 1993-12-27 1995-06-28 Hitachi, Ltd. Continuous casting apparatus and continuous casting system
EP0920936A2 (en) * 1997-12-03 1999-06-09 Sms Schloemann-Siemag Aktiengesellschaft Mould for continuous casting
EP1002599A1 (en) * 1998-11-21 2000-05-24 SMS Demag AG Mould for the continuous casting of metals
US6186220B1 (en) 1997-09-27 2001-02-13 Sms Schloemann-Siemag Aktiengesellschaft Funnel geometry of a mold for the continuous casting of metal
US6390177B1 (en) 1997-08-04 2002-05-21 Giovanni Arvedi Contact mould for the continuous casting of steel slabs
WO2002064286A2 (en) * 2001-02-09 2002-08-22 Egon Evertz K.G. (Gmbh & Co) Continuous casting ingot mould

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1262073B (en) * 1993-02-16 1996-06-19 Danieli Off Mecc LINGOTTIERA FOR CONTINUOUS CASTING OF THIN SLABS
DE4343124C2 (en) * 1993-12-17 1996-05-23 Schloemann Siemag Ag Mold for the continuous casting of steel strip
DE4403050C1 (en) * 1994-01-28 1995-09-28 Mannesmann Ag Continuous casting mold for guiding strands
DE4424600A1 (en) * 1994-07-13 1996-01-18 Eko Stahl Gmbh Mould for continuous casting of thin slabs
DE59506676D1 (en) * 1994-07-25 1999-09-30 Concast Standard Ag Straggiesskokille for a double-T pre-profile
DE19728957A1 (en) * 1997-06-30 1999-01-07 Mannesmann Ag Method and device for producing thin slabs
DE19850575A1 (en) * 1998-11-02 2000-05-11 Schloemann Siemag Ag Width-adjustable continuous casting mold with curved partitions
DE10009073A1 (en) * 1999-11-10 2001-05-17 Sms Demag Ag Mold has a funnel-shaped casting region having cooled wide side walls and narrow side walls with the region tapering in the casting direction to format the casting strand
AT410766B (en) * 2001-09-28 2003-07-25 Voest Alpine Ind Anlagen ended mold
CN102328037A (en) * 2011-09-21 2012-01-25 首钢总公司 Chamfered crystallizer with taper continuous casting plate blank

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3400220A1 (en) * 1984-01-05 1985-07-18 SMS Schloemann-Siemag AG, 4000 Düsseldorf CHOCOLATE FOR CONTINUOUSLY STEEL STRIP
DE3640525C2 (en) * 1986-11-27 1996-02-15 Schloemann Siemag Ag Mold for the continuous casting of steel strip
DE3712314A1 (en) * 1987-04-11 1988-10-20 Robot Foto Electr Kg TRAFFIC MONITORING DEVICE
IT1218613B (en) * 1987-04-27 1990-04-19 Danieli Off Mecc PROCEDURE FOR THIN SLABS AND LINGOTTEER ADOPTING SUCH PROCEDURE
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
DE3907351C2 (en) * 1989-03-08 1998-09-24 Schloemann Siemag Ag Pouring funnel of a mold

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0659503A2 (en) * 1993-12-27 1995-06-28 Hitachi, Ltd. Continuous casting apparatus and continuous casting system
US6390177B1 (en) 1997-08-04 2002-05-21 Giovanni Arvedi Contact mould for the continuous casting of steel slabs
US6186220B1 (en) 1997-09-27 2001-02-13 Sms Schloemann-Siemag Aktiengesellschaft Funnel geometry of a mold for the continuous casting of metal
EP0920936A2 (en) * 1997-12-03 1999-06-09 Sms Schloemann-Siemag Aktiengesellschaft Mould for continuous casting
EP0920936A3 (en) * 1997-12-03 2000-04-26 Sms Schloemann-Siemag Aktiengesellschaft Mould for continuous casting
EP1002599A1 (en) * 1998-11-21 2000-05-24 SMS Demag AG Mould for the continuous casting of metals
WO2002064286A2 (en) * 2001-02-09 2002-08-22 Egon Evertz K.G. (Gmbh & Co) Continuous casting ingot mould

Also Published As

Publication number Publication date
CA2087314A1 (en) 1993-07-21
DE4201363A1 (en) 1993-07-22
ATE152938T1 (en) 1997-05-15
JP3140592B2 (en) 2001-03-05
JPH07132347A (en) 1995-05-23
DE59208495D1 (en) 1997-06-19
ES2101793T3 (en) 1997-07-16
DE4201363C2 (en) 2000-08-10
US5311922A (en) 1994-05-17
EP0552501A2 (en) 1993-07-28
EP0552501A3 (en) 1995-02-22

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