EP0633080B2 - Continuous casting mould for casting thin slabs - Google Patents

Continuous casting mould for casting thin slabs Download PDF

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Publication number
EP0633080B2
EP0633080B2 EP94110511A EP94110511A EP0633080B2 EP 0633080 B2 EP0633080 B2 EP 0633080B2 EP 94110511 A EP94110511 A EP 94110511A EP 94110511 A EP94110511 A EP 94110511A EP 0633080 B2 EP0633080 B2 EP 0633080B2
Authority
EP
European Patent Office
Prior art keywords
continuous casting
strips
narrow side
narrow
side walls
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
EP94110511A
Other languages
German (de)
French (fr)
Other versions
EP0633080A3 (en
EP0633080B1 (en
EP0633080A2 (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 Demag AG
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Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP0633080A2 publication Critical patent/EP0633080A2/en
Publication of EP0633080A3 publication Critical patent/EP0633080A3/en
Publication of EP0633080B1 publication Critical patent/EP0633080B1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0408Moulds for casting thin slabs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/055Cooling the moulds

Definitions

  • the invention relates to a continuous casting mold for Pouring thin slabs with cooled broad side walls and adjustably arranged between them, refrigerated narrow side walls that have an upper molding with an extended pouring area and a lower support part.
  • the object of the invention is to create a Chill mold of the specified type, with no impairment the dimensional stability in a simple way the formation from edge cracks in the thin slab avoided becomes. An adjustment of the narrow side wall is intended and a seal at the lower end of the mold is possible his.
  • each narrow side wall consists of the working side of each narrow side wall a flat upper section and a lower one Section with lowered side stripes.
  • each narrow side wall from an upper one Section with raised side stripes and a flat one lower section.
  • the width of the side strips is advantageous maximum 15 mm.
  • the length is protruding side stripes in the upper section of the Narrow side wall at least 400 mm.
  • FIG. 1 and 2 there is a mold for pouring thin slabs from two broad side walls 1,2 and two laterally between the broad side walls 1, 2 adjustable Narrow side walls 3, 4.
  • the wide side walls 1, 2 are curved and form in the embodiment above an extended pouring area 5.
  • the broad side walls 1, 2 and the narrow side walls 3, 4 are with Cooling water channels 6 provided.
  • FIG. 1 An inventive design of the working side of the narrow side walls 3 according to FIG. 1, left side illustrated in Figures 3, 5 and 7. After that exist the narrow side walls 3 from an upper section 3a with flat work surface 3a 'and a lower one Section 3b. A middle one is aligned in the lower section 3b Strip 3b 'with the top work surface 3a'. Two lateral strips 3b "are opposite the middle Strip 3b 'deepened. Its width is advantageously less than 15 mm.
  • FIG. 1 An alternative design of the Working side of the narrow side wall 4 according to FIG. 1, right side, is illustrated in Figures 4, 6 and 8.
  • the narrow side walls 4 consist of one upper section 4a and a lower section 4b.
  • the upper section 4a has a central strip 4a ' and two protruding side strips 4a " lower section 4b forms one with the middle stripe 4a 'of the upper section aligned, overall flat Work surface 4b '

Abstract

In a continuous casting moulding for casting thin slabs, two cooled broad-side walls (1, 2) form, with two cooled narrow-side walls (3, 4) arranged adjustably between them, an upper moulding section and a lower supporting section. To improve product quality, in particular to avoid edge cracks, the narrow-side walls (3, 4) have differing side strips on the inner, working side of the moulding section and the supporting section, the side strips (3b'' and 4b') in the supporting section (3b and 4b respectively) being offset outwards relative to the side strips (3a' and 4a'') of the moulding section (3a and 4a respectively). <IMAGE>

Description

Die Erfindung betrifft eine Stranggießkokille zum Gießen von Dünnbrammen mit gekühlten Breitseitenwänden und zwischen diesen verstellbar angeordneten, gekühlten Schmalseitenwänden, die einen oberen Formteil mit einem erweiterten Eingießbereich und einen unteren Stützteil bilden.The invention relates to a continuous casting mold for Pouring thin slabs with cooled broad side walls and adjustably arranged between them, refrigerated narrow side walls that have an upper molding with an extended pouring area and a lower support part.

Bei einer derartigen, durch die DE-A1 41 31 829 bekannten Kokille bilden die gekühlten Breitseitenwände und Schmalseitenwände den oberen Formteil und den die Dünnbramme allseitig bis zum Kokillenausgang umschließenden Stützteil. Der Stützteil wird unten zum Anfahren vom Anfahrkopf verschlossen. Durch Verstellung der Schmalseitenwände kann die gewünschte Breite der Dünnbramme eingestellt werden. Die bekannte Kokille hat den Nachteil, daß es insbesondere beim Gießen mit hohen Gießgeschwindigkeiten zur Rißbildung in den Kanten der Dünnbrammen kommt. Dies führt zur Qualitätsminderung im gewalzten Fertigprodukt.In such a, by DE-A1 41 31 829 The chilled broad side walls form the well-known mold and narrow side walls the upper molding and the thin slab on all sides up to the mold exit enclosing support part. The support part is below closed from the start head for starting. By adjustment the narrow side walls can be the desired one Width of the thin slab can be set. The Known mold has the disadvantage that it is in particular when casting at high casting speeds to form cracks comes in the edges of the thin slabs. This leads to a reduction in quality in the rolled finished product.

Durch die DE-A2 19 06 261 ist es bei der Gattung der Knüppelkokillen bekannt, 300 - 500 mm unter dem Gießspiegel in der Kokillenwandung Eckenspalte vorzusehen und diese Eckenspalte im Abstand durch wärmedämmende Wandplatten abzudecken. Bei dieser aufwendigen Kokille ist eine Endabdichtung durch den Anfahrkopf äußerst schwierig durchführbar. Eine Formatverstellung ist wegen der starren Verbindung der Wände ausgeschlossen. Die Wärmedämmung der Ecken ist beim Gießen von Dünnbrammen mit hoher Gießgeschwindigkeit nachteilig.By DE-A2 19 06 261 it is in the genus the billet molds are known, 300 - 500 mm below the Casting level in the mold wall to provide corner gaps and this corner column at a distance by thermal insulation Cover wall panels. At this elaborate mold is a final seal through the Starting head extremely difficult to carry out. A format adjustment is because of the rigid connection Walls excluded. The thermal insulation of the Corners are high when pouring thin slabs Casting speed disadvantageous.

Aufgabe der Erfindung ist die Schaffung einer Kokille der angegebenen Gattung, wobei ohne Beeinträchtigung der Formstabilität auf einfache Weise die Bildung von Kantenrissen in der Dünnbramme vermieden wird. Dabei soll eine Verstellung der Schmalseitenwand und eine Abdichtung am unteren Kokillenende möglich sein.The object of the invention is to create a Chill mold of the specified type, with no impairment the dimensional stability in a simple way the formation from edge cracks in the thin slab avoided becomes. An adjustment of the narrow side wall is intended and a seal at the lower end of the mold is possible his.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Durch diese Distanzbildung zwischen der Gießstrangseite und den Seitenstreifen der Schmalseitenwände wird auf einfache Weise eine zu starke beidseitige Abkühlung der Gießstrangkanten und damit eine Rißbildung vermieden. Dabei ist eine Abdichtung der Kokille durch den Anfahrkopf am unteren Ende der Kokille und eine Verstellung der Schmalseitenwände zur Formatverstellung sowie zur Einstellung der Konizität möglich.This distance between the casting strand side and the side strips of the narrow side walls easily becomes too strong cooling of the casting strand edges on both sides and thus avoided cracking. There is a seal the mold through the start head at the bottom of the Mold and an adjustment of the narrow side walls for Format adjustment and conicity adjustment possible.

Nach einem weiteren Merkmal der Erfindung besteht die Arbeitsseite jeder Schmalseitenwand aus einem ebenen oberen Abschnitt und einem unteren Abschnitt mit abgesenkten Seitenstreifen.According to a further feature of the invention consists of the working side of each narrow side wall a flat upper section and a lower one Section with lowered side stripes.

Alternativ kann es vorteilhaft sein, daß die Arbeitsseite jeder Schmalseitenwand aus einem oberen Abschnitt mit erhöhten Seitenstreifen und einem ebenen unteren Abschnitt besteht.Alternatively, it may be advantageous for the work side each narrow side wall from an upper one Section with raised side stripes and a flat one lower section.

Die Breite der Seitenstreifen beträgt vorteilhaft maximal 15 mm.The width of the side strips is advantageous maximum 15 mm.

Die Länge der nach außen versetzten Seitenstreifen im unteren Abschnitt der Schmalseitenwand beträgt maximal 400 mm.The length of the outside stripes in the lower section of the narrow side wall maximum 400 mm.

Bei alternativer Ausbildung beträgt die Länge der vorstehenden Seitenstreifen im oberen Abschnitt der Schmalseitenwand mindestens 400 mm.With alternative training, the length is protruding side stripes in the upper section of the Narrow side wall at least 400 mm.

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

Fig. 1
zwei Teilinnenansichten von Kokillen zum Gießen von Dünnbrammen mit unterschiedlich gestalteten Schmalseitenwänden,
Fig. 2
Teildraufsichten der in Fig. 1 dargestellten Kokillen,
Fig. 3
einen vergrößerten Querschnitt gemäß der Linie III-III in Fig. 1,
Fig. 4
einen vergrößerten Querschnitt gemäß der Linie IV-IV in Fig. 1,
Fig. 5
einen vergrößerten Querschnitt gemäß der Linie V-V in Fig. 1,
Fig. 6
einen vergrößerten Querschnitt gemäß der Linie VI-VI in Fig. 1,
Fig. 7
einen Längsschnitt gemäß der Linie VII-VII in Fig. 1 und
Fig. 8
einen Längsschnitt gemäß der Linie VIII-VIII in Fig. 1.
The drawing shows exemplary embodiments with features and advantages of the invention. Show it
Fig. 1
two partial interior views of molds for casting thin slabs with differently designed narrow side walls,
Fig. 2
Partial top views of the molds shown in FIG. 1,
Fig. 3
2 shows an enlarged cross section along the line III-III in FIG. 1,
Fig. 4
2 shows an enlarged cross section along the line IV-IV in FIG. 1,
Fig. 5
2 shows an enlarged cross section along the line VV in FIG. 1,
Fig. 6
2 shows an enlarged cross section along the line VI-VI in FIG. 1,
Fig. 7
a longitudinal section along the line VII-VII in Fig. 1 and
Fig. 8
a longitudinal section along the line VIII-VIII in Fig. 1st

Gemäß den Figuren 1 und 2 besteht eine Kokille zum Gießen von Dünnbrammen aus zwei Breitseitenwänden 1,2 und zwei seitlich zwischen den Breitseitenwänden 1, 2 verstellbar angeordnete Schmalseitenwänden 3, 4. Die Breitseitenwände 1, 2 sind im Ausführungsbeispiel oben gewölbt und bilden einen erweiterten Eingießbereich 5. Die Breitseitenwände 1, 2 und die Schmalseitenwände 3, 4 sind mit Kühlwasserkanälen 6 versehen.According to Figures 1 and 2 there is a mold for pouring thin slabs from two broad side walls 1,2 and two laterally between the broad side walls 1, 2 adjustable Narrow side walls 3, 4. The wide side walls 1, 2 are curved and form in the embodiment above an extended pouring area 5. The broad side walls 1, 2 and the narrow side walls 3, 4 are with Cooling water channels 6 provided.

Eine erfindungsgemäße Gestaltung der Arbeitsseite der Schmalseitenwände 3 gemäß Fig. 1, linke Seite, ist in den Figuren 3, 5 und 7 verdeutlicht. Danach bestehen die Schmalseitenwände 3 aus einen oberen Abschnitt 3a mit ebener Arbeitsfläche 3a' und einem unteren Abschnitt 3b. Im unteren Abschnitt 3b fluchtet ein mittlerer Streifen 3b' mit der oberen Arbeitsfläche 3a'. Zwei seitliche Streifen 3b" sind gegenüber dem mittleren Streifen 3b' vertieft. Ihre Breite ist vorteilhaft geringer als 15 mm. An inventive design of the working side of the narrow side walls 3 according to FIG. 1, left side illustrated in Figures 3, 5 and 7. After that exist the narrow side walls 3 from an upper section 3a with flat work surface 3a 'and a lower one Section 3b. A middle one is aligned in the lower section 3b Strip 3b 'with the top work surface 3a'. Two lateral strips 3b "are opposite the middle Strip 3b 'deepened. Its width is advantageously less than 15 mm.

Hierdurch wird erreicht, daß im oberen Teil 3a an den gekühlten Wänden 1,2,3a' eine rechteckige Strangschale 7 erstarrt, die bei der Abwärtsbewegung kontinuierlich dicker wird und bis zum unteren Abschnitt 3b selbststützende Kanten ausbildet. Auf diese Weise entsteht an den zurückliegenden Seitenstreifen 3b" je ein Spalt 8, in dessen Bereich die Kühlung vermindert und die Bildung von Kantenrissen in der gegossenen Dünnbramme vermieden werden.This ensures that in the upper part 3a the cooled walls 1,2,3a 'a rectangular strand shell 7 solidifies, which is continuous with the downward movement becomes thicker and up to the lower section 3b forms self-supporting edges. In this way it is created on the back side strips 3b "each Gap 8, in the area of which cooling is reduced and the formation of edge cracks in the cast thin slab be avoided.

Eine alternative erfindungsgemäße Gestaltung der Arbeitsseite der Schmalseitenwand 4 gemäß Fig. 1, rechte Seite, ist in den Figuren 4, 6 und 8 verdeutlicht. Danach bestehen die Schmalseitenwände 4 aus einem oberen Abschnitt 4a und einem unteren Abschnitt 4b. Der obere Abschnitt 4a weist einen mittleren Streifen 4a' und zwei vorstehendende Seitenstreifen 4a" auf. Der untere Abschnitt 4b bildet eine mit dem mittleren Streifen 4a' des oberen Abschnitts fluchtende, insgesamt ebene Arbeitsfläche 4b' Hierbei erstarrt an den Arbeitsflächen 4a', 4a" des oberen Abschnittes 4a der Schmalseitenwand 4 die in Fig. 4 dargestellte Strangschale 9 mit zurückliegenden Seitenstreifen 9a. Diese bilden, aufgrund der bei fortschreitender Erstarrung wirkenden Selbststützung mit der ebenen Arbeitsfläche 4b' des unteren Abschnitts 4b Spalte 10, durch welche die Kühlung vermindert und Kantenrisse in der gegossenen Dünnbramme vermieden werden.An alternative design of the Working side of the narrow side wall 4 according to FIG. 1, right side, is illustrated in Figures 4, 6 and 8. Thereafter, the narrow side walls 4 consist of one upper section 4a and a lower section 4b. The upper section 4a has a central strip 4a ' and two protruding side strips 4a " lower section 4b forms one with the middle stripe 4a 'of the upper section aligned, overall flat Work surface 4b 'This solidifies on the work surfaces 4a ', 4a "of the upper section 4a of the narrow side wall 4 with the strand shell 9 shown in FIG back side strips 9a. These form due to the one that acts with progressive solidification Self-support with the flat work surface 4b ' lower section 4b column 10 through which the cooling diminished and edge cracks in the cast Thin slabs can be avoided.

Claims (6)

  1. Continuous casting chill mould for the casting of thin slabs, with cooled, wide side walls and cooled narrow side walls adjustably arranged therebetween, which form an upper mould part with a widened pouring-in region (5) and a lower support part, characterised thereby that the narrow side walls (3, 4) in the mould part and support part have different side strips at the inner working side and the side strips (3b" or 4b") in the support part (3b or 4b) are displaced outwardly relative to the side strips (3a' or 4a") of the mould part (3a or 4a) for formation of a spacing between cast strip and narrow side wall.
  2. Continuous casting chill mould according to claim 1, characterised thereby that the working side of each narrow side wall (3) consists of a flat upper portion (3a') and a lower portion (3b) with lowered side strips (3b").
  3. Continuous casting chill mould according to claim 1, characterised thereby that the working side of each narrow side wall (4) consists of an upper portion (4a) with elevated side strips (4a") and a flat lower portion (4b').
  4. Continuous casting chill mould according to claim 1, characterised thereby that the width of the side strips (3b", 4a") amounts to at most 15 millimetres.
  5. Continuous casting chill mould according to claims 1 and 2, characterised thereby that the length of the outwardly displaced side strips (3b") in the lower section (3b) of the narrow side wall (3) amounts to at most 400 millimetres.
  6. Continuous casting chill mould according to claims 1 and 2, characterised thereby that the length of the protruding side strips (4a") in the upper portion (4a) of the narrow side wall (4) amounts to at least 400 millimetres.
EP94110511A 1993-07-09 1994-07-06 Continuous casting mould for casting thin slabs Expired - Lifetime EP0633080B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4322948A DE4322948A1 (en) 1993-07-09 1993-07-09 Continuous casting mold for casting thin slabs
DE4322948 1993-07-09

Publications (4)

Publication Number Publication Date
EP0633080A2 EP0633080A2 (en) 1995-01-11
EP0633080A3 EP0633080A3 (en) 1995-04-26
EP0633080B1 EP0633080B1 (en) 1996-05-15
EP0633080B2 true EP0633080B2 (en) 2002-09-04

Family

ID=6492377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94110511A Expired - Lifetime EP0633080B2 (en) 1993-07-09 1994-07-06 Continuous casting mould for casting thin slabs

Country Status (7)

Country Link
US (1) US5503216A (en)
EP (1) EP0633080B2 (en)
JP (1) JP3337321B2 (en)
KR (1) KR960013518A (en)
AT (1) ATE138000T1 (en)
CA (1) CA2127639A1 (en)
DE (2) DE4322948A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100362255B1 (en) * 2000-06-09 2002-11-29 이현빈 Apparatus for supplying doggy meal
KR20030073158A (en) * 2002-03-08 2003-09-19 조상균 automatic grains provider for a pet
KR100470454B1 (en) * 2002-05-14 2005-02-05 대한민국 Auto-control feeder to provide feed of pigs

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1443574A (en) * 1965-07-16 1966-06-24 Schloemann Ag Cooled ingot mold for continuous casting
US3520352A (en) * 1967-10-19 1970-07-14 Koppers Co Inc Continuous casting mold having insulated portions
AT289317B (en) * 1968-02-09 1971-04-13 Tsnii Chernoi Metallurg Im Bar Mold for forming strands with a rectangular cross-section in metal continuous casting
FR1586213A (en) * 1968-09-17 1970-02-13
US4023612A (en) * 1975-11-25 1977-05-17 Inland Steel Company Continuous casting mold and process of casting
DE4131829C2 (en) * 1990-10-02 1993-10-21 Mannesmann Ag Liquid-cooled mold for the continuous casting of steel strands in slab format

Also Published As

Publication number Publication date
JP3337321B2 (en) 2002-10-21
EP0633080A3 (en) 1995-04-26
KR960013518A (en) 1996-05-22
ATE138000T1 (en) 1996-06-15
EP0633080B1 (en) 1996-05-15
EP0633080A2 (en) 1995-01-11
US5503216A (en) 1996-04-02
JPH07144257A (en) 1995-06-06
DE59400276D1 (en) 1996-06-20
CA2127639A1 (en) 1995-01-10
DE4322948A1 (en) 1995-01-12

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