EP0551311B1 - Liquid-cooled mould for continuous casting of steel billets in slab form - Google Patents

Liquid-cooled mould for continuous casting of steel billets in slab form Download PDF

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Publication number
EP0551311B1
EP0551311B1 EP91916776A EP91916776A EP0551311B1 EP 0551311 B1 EP0551311 B1 EP 0551311B1 EP 91916776 A EP91916776 A EP 91916776A EP 91916776 A EP91916776 A EP 91916776A EP 0551311 B1 EP0551311 B1 EP 0551311B1
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EP
European Patent Office
Prior art keywords
chill
side plates
height
section
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.)
Revoked
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EP91916776A
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German (de)
French (fr)
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EP0551311A1 (en
Inventor
Giovanni Arvedi
Giovanni Gosio
Ulrich Siegers
Luciano Manini
Fritz-Peter Pleschiutschnigg
Lothar Parschat
Hans-Günther THURM
Harald LÜDORFF
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Vodafone GmbH
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Mannesmann AG
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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
    • B22D11/055—Cooling the moulds
    • 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
    • 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
    • B22D11/043—Curved moulds

Definitions

  • the invention relates to a liquid-cooled, width-adjustable plate mold for the continuous casting of steel strands in slab format, in particular with a slab thickness of less than 100 mm.
  • molds are usually used, the free cross-sectional area at the mold exit of which corresponds to the desired strand format.
  • DE 35 01 422 C2 also includes a mold of the prior art, the narrow walls of which can be adjusted to different strand dimensions and the pouring opening has an oval cross-sectional area. At the outlet end, the mold tapers in such a way that the slab broad sides are formed with parallel walls, while the narrow side walls diverge from the pouring side to the pouring side. but keep their concave shape.
  • a mold is also known from EP 0 249 146 or US Pat. No. 4,716,955.
  • molds are known, with flat surfaces of the narrow sides of the mold and broad sides that bulge outwards over the entire height of the mold.
  • the present invention has for its object to improve the cooling conditions within the continuous casting mold and to avoid blocking the movement of the strand in the width direction when the strand passes through the mold, so that the risk of longitudinal cracks and breakthroughs is largely excluded.
  • Part of the invention is that the reduction in the apex height can be done both linearly and after an e-function.
  • the crowning provided according to the invention can also differ from the circular shape in a polygon or from the combination of Polygonal trains and floor elements. Overall, it is provided that at the bottom of the mold, that is to say at the end of the strand exit, there is still the optimum crowning of, for example, 1 mm per side for a rolling process. Accordingly, the following roller strand guide is designed in accordance with the crowning of the strand. This results in the advantage, among other things, that all rolls of the same diameter can be freely converted in their position and no deformation work with regard to changing the crowning has to be carried out.
  • the broad side plates 1 are processed in the area 3 'in such a way that the surface enclosed by the broad sides in plan view, starting from side lines of the inscribed rectangle, form an isosceles trapezoid in such a way that the larger base line of the trapezoid coincides with the side lines of the inscribed rectangle.
  • the base line of the trapezoid is 0.4 mm longer than the opposite side.
  • the contact pressure of the broad side plates on the narrow side plates is first reduced when the width is adjusted, the narrow side plates are then moved and then the broad side plates are then pressed again.
  • the described design of the broadside plates 1 can be used with straight and circular molds and also with curved molds with several different radii of curvature, as shown in FIG. 3 and designated R1-R4.
  • a mold is shown, the pouring side of a straight section 6 with a subsequent arcuate part consists.
  • the immersion spout 7 which is elongate in cross section, for supplying the melt.
  • the broad side plates 1 are cooled by means of water which is passed through channels 8 in the rear of the shaping wall consisting of copper.
  • the copper walls are fastened in the usual way to a plate, not shown, which at the same time covers the channels, via bolts which engage in recesses 9.
  • the cooling channels 8 have a depth, at least in the upper mold half, such that the distance of the channel base 8 ', seen in plan view, increases from the mold center 10 to the narrow side walls 2 in relation to the surface of the broad side plate 1 facing the melt.
  • the mold consists of three areas with different crown heights 13 of the arc.
  • the area 6, here also designated L1 corresponds to that as described in FIG. 5.
  • the apex height 13 decreases linearly to an amount 14 which corresponds to the mold exit 5.
  • the lower mold section 12 thus has a constant apex height 13.

Abstract

PCT No. PCT/DE91/00761 Sec. 371 Date Jun. 1, 1993 Sec. 102(e) Date Jun. 1, 1993 PCT Filed Sep. 23, 1991 PCT Pub. No. WO92/05898 PCT Pub. Date Apr. 16, 1992.A liquid-cooled plate mold with adjustable width for the continuous casting of billets from steel in the form of slabs, particularly for a slab thickness of less than 100 mm. The shape-imparting broad side plates (1) and narrow side plates (2) of the ingot mold are constructed in the direction of their transverse extension so as to increase in cross section for the billet, while the narrow side plates (2) extend substantially parallel to one another along the height of the ingot mold. Further, the broad side plates (1) are constructed so as to be concave at least in a region (3) of smallest slab width in such a way that, in cross section, the apex height (13) of the ingot mold wall forming a curve has a determined height relative to a rectangle inserted in the drawing. The shape of the billet side plates at the billet outlet end (5) corresponds to the billet format to be produced.

Description

Die Erfindung betrifft eine flüssigkeitsgekühlte, breitenverstellbare Plattenkokille für das Stranggießen Von Strängen aus Stahl im Brammenformat, insbesondere mit einer Dicke der Brammen unter 100 mm.The invention relates to a liquid-cooled, width-adjustable plate mold for the continuous casting of steel strands in slab format, in particular with a slab thickness of less than 100 mm.

Zur Erzeugung von Stahlsträngen im Brammenformat bedient man sich üblicherweise Kokillen, deren freie Querschnittsfläche am Kokillenausgang dem gewünschten Strangformat entspricht.To produce steel strands in slab format, molds are usually used, the free cross-sectional area at the mold exit of which corresponds to the desired strand format.

Aus der US-PS 27 67 448 ist eine entsprechende Kokille für einen Strang mit ovalem Querschnitt bekannt. Diese Kokille betrifft eine sogenannte Blockkokille, d. h. die Kokille ist im Querschnitt nicht veränderbar bzw. für die Einstellung verschiedener Strangformate nicht geeignet. Ferner gehört durch die DE 35 01 422 C2 eine Kokille zum Stand der Technik, deren Schmalseltenwände auf unterschiedliche Strangabmessungen einstellbar ist und deren Eingießöffnung eine ovale Querschnittsfläche aufweist. Zum Austrittsende hin verjüngt sich die Kokille derart, daß die Brammenbreitseiten parallelwandig ausgebildet sind, während die Schmalseitenwände von der Eingießseite zur Ausgießseite divergieren, ihre konkave Form jedoch beibehalten. Eine derartige Kokille ist ebenso aus der EP 0 249 146, bzw. der US-PS 47 16 955 bekannt.From US-PS 27 67 448 a corresponding mold for a strand with an oval cross-section is known. This mold relates to a so-called block mold, ie the cross-section of the mold cannot be changed or is not suitable for setting different strand formats. DE 35 01 422 C2 also includes a mold of the prior art, the narrow walls of which can be adjusted to different strand dimensions and the pouring opening has an oval cross-sectional area. At the outlet end, the mold tapers in such a way that the slab broad sides are formed with parallel walls, while the narrow side walls diverge from the pouring side to the pouring side. but keep their concave shape. Such a mold is also known from EP 0 249 146 or US Pat. No. 4,716,955.

Gemäß DE-A1 36 27 991 und WO 87/00099 sind Kokillen bekannt, mit ebenen Flächen der Kokillenschmalseiten und über die ganze Höhe der Kokille nach außen gewölbten Breitseiten.According to DE-A1 36 27 991 and WO 87/00099, molds are known, with flat surfaces of the narrow sides of the mold and broad sides that bulge outwards over the entire height of the mold.

Bei Anwendung all dieser Kokillen ist zu verzeichnen, daß offenbar bedingt durch unterschiedliches Anliegen der Strangschale an der Kokillenwand Verformungen der Strangschale beim Durchgang des Stranges durch die Kokille auftreten, die zu Rißbildungen in der Strangschale führen können.When using all of these molds, it can be noted that, as a result of the strand shell being in contact with the mold wall differently, deformations of the strand shell occur when the strand passes through the mold, which can lead to crack formation in the strand shell.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, die Abkühlungsverhältnisse innerhalb der Stranggießkokille zu verbessern und beim Durchgang des Stranges durch die Kokille ein Blockieren der Bewegung des Stranges auch in Breitenrichtung zu vermeiden, so daß die Gefahr von Längsrissen und Durchbrüchen weitestgehend ausgeschlossen ist.The present invention has for its object to improve the cooling conditions within the continuous casting mold and to avoid blocking the movement of the strand in the width direction when the strand passes through the mold, so that the risk of longitudinal cracks and breakthroughs is largely excluded.

Bei einer Kokille gemäß Gattungsbegriff des Anspruches 1 wird die Aufgabe erfindungsgemäß durch die Merkmale des kennzeichnenden Teiles des Anspruches 1 gelöst.In a mold according to the preamble of claim 1, the object is achieved according to the invention by the features of the characterizing part of claim 1.

Weitere Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Further refinements of the invention are specified in the subclaims.

Mit zur Erfindung gehört, daß die Verringerung der Scheitelhöhe sowohl linear als auch nach einer e-Funktion erfolgen kann. Die gemäß der Erfindung vorgesehene Bombierung kann auch abweichend von der Kreisform in einem Polygon bestehen oder aus der Kombination von Polygonalzügen und Bodenelemente. Insgesamt ist vorgesehen, daß am Fuß der Kokille, also am Strangaustrittsende, noch die für einen Walzprozeß optimale Bombierung von z.B. 1 mm pro Seite vorliegt. Demgemäß ist die folgende Rollen-Strangführung entsprechend der Bombierung des Stranges ausgebildet. Dies ergibt u.a. den Vorteil, daß alle Rollen gleichen Durchmessers in ihrer Position beliebig konvertierbar sind und keine Verformungsarbeit hinsichtlich der Veränderung der Bombierung zu leisten ist.Part of the invention is that the reduction in the apex height can be done both linearly and after an e-function. The crowning provided according to the invention can also differ from the circular shape in a polygon or from the combination of Polygonal trains and floor elements. Overall, it is provided that at the bottom of the mold, that is to say at the end of the strand exit, there is still the optimum crowning of, for example, 1 mm per side for a rolling process. Accordingly, the following roller strand guide is designed in accordance with the crowning of the strand. This results in the advantage, among other things, that all rolls of the same diameter can be freely converted in their position and no deformation work with regard to changing the crowning has to be carried out.

Die Zeichnung stellt ein Ausführungsbeispiel einer erfindungsgemäßen Kokille dar. Es zeigen

Fig. 1
eine Draufsicht auf eine Kokille im Querschnitt A-A nach Fig. 3 für eine minimale Brammenbreite
Fig. 2
ein Teilbild nach Fig. 1 mit der Stellung der Schmalseiten für eine maximale Brammenbreite,
Fig. 3
einen Längsschnitt B-B nach Fig. 1 und
Fig. 4
den Verstellbererich der Kokille nach den Fig. 1 und 2 in vergrößerter Darstellung.
Fig. 5
eine weitere Ausführungsform im Längsschnitt
Fig. 6-8
eine abgewandette Ausführung in Schnitten
In den Zeichnungen sind gleiche Teile mit gleichen Bezugszeichen versehen. Die Kokille besteht aus Breitseitenplatten 1 mit zwischen diesen verschiebbar angeordneten Schmalseitenplatten 2. In der in Fig. 1 dargestellten Lage definieren die Schmalseitenplatten 2 den mit dieser Kokille erzielbaren kleinsten Gießquerschnitt, also die geringste Brammenbreite (b min). In diesem Bereich 3 ist in die Breitseitenplatten 1 auf den den Gießquerschnitt bildenden Seiten eine flache, bogenförmige, im Querschnitt gesehen sich üder diesen Bereich 3 erstreckende Ausnehmung eingearbeitet. Die Bogenhöhe bzw. Scheitelhöhe 13 gegenüber einem eingeschriebenen Rechteck - Sehne des Bogens - beträgt an der Eingießseite 4 der Kokille maximal 12 mm über einen Abschnitt 6 von ca. 1/3 der Kokillenhöhe und verringert sich dann zur Unterkante 5 der Kokille hin auf eine Bogenhöhe von 1 mm (Fig. 5). Die gewählte Bombierung an der Eingießseite der Kokille entsprich einer max. Strangschalenverlängerung über die Format-Breite von 20 % des Schrumpfens.The drawing shows an embodiment of a mold according to the invention
Fig. 1
a plan view of a mold in cross section AA of FIG. 3 for a minimum slab width
Fig. 2
1 with the position of the narrow sides for a maximum slab width,
Fig. 3
a longitudinal section BB of FIG. 1 and
Fig. 4
the adjustment range of the mold according to FIGS. 1 and 2 in an enlarged view.
Fig. 5
another embodiment in longitudinal section
Fig. 6-8
a modified version in cuts
In the drawings, the same parts are provided with the same reference numerals. The mold consists of broad side plates 1 with narrow side plates 2 arranged displaceably between them. In the position shown in FIG. 1, the narrow side plates 2 define the smallest casting cross section that can be achieved with this mold, ie the smallest slab width (b min). In this area 3, a flat, arc-shaped recess, seen in cross-section extending over this area 3, is worked into the broad side plates 1 on the sides forming the casting cross section. The arch height or apex height 13 compared to an inscribed rectangle - chord of the arch - on the pouring side 4 of the mold is a maximum of 12 mm above one Section 6 of about 1/3 of the mold height and then decreases towards the lower edge 5 of the mold to an arc height of 1 mm (Fig. 5). The selected crowning on the pouring side of the mold corresponds to a max. Strand shell extension over the format width of 20% of shrinkage.

Beispiel:Example:

StrangbreiteStrand width 1.000 mm1,000 mm Schrumpf (0,8 %)Shrinkage (0.8%) 8 mm8 mm zusätzliche Längung max.additional elongation max. 1,6 mm1.6 mm

Zur Vergrößerung derr Brammenbreite schließen sich an den Bereich 3 der Breitseitenplatten 1 seitlich Bereiche 3' an, innerhalb der die Schmalseitenplatten 2 verstellt werden können (Fig. 2). Diese Bereiche 3' erstrecken sich bei gleichbleibender Querschnittsfläche für den zu erzeugenden Strang über die gesamte Kokillenhöhe. Die Breitseitenplatten 1 sind in dem Bereich 3' derart bearbeitet, daß die von den Breitseiten eingeschlossene Fläche in der Draufsicht, ausgehend von Seitenlinien des eingeschriebenen Rechteckes, ein gleichschenkliges Trapez bilden derart, daß die größere Grundlinie des Trapezes mit den Seitenlinien des eingeschriebenen Rechteckes übereinstimmt. Dabei ist die Grundlinie des Trapezes 0,4 mm länger als die gegenüberliegende Seite. In Hinblick auf diese Neigung des Bereiches 3' wird bei einer Breitenverstellung zunächst der Anpreßdruck der Breitseitenplatten an die Schmalseitenplatten verringert, die Schmalseitenplatten werden dann verschoben und anschließend werden dann die Breitseitenplatten wieder angepreßt. Die beschriebene Ausbildung der Breitseiteinplatten 1 ist anwendbar bei graden und kreisbogenförmigen Kokillen und auch bei gebogenen Kokillen mit mehreren, unterschiedlichen Krümmungsradien, wie in Fig. 3 dargestellt und mit R1- R4 bezeichnet.To increase the slab width, areas 3 'adjoin the area 3 of the wide side plates 1, within which the narrow side plates 2 can be adjusted (FIG. 2). These areas 3 'extend over the entire mold height with a constant cross-sectional area for the strand to be produced. The broad side plates 1 are processed in the area 3 'in such a way that the surface enclosed by the broad sides in plan view, starting from side lines of the inscribed rectangle, form an isosceles trapezoid in such a way that the larger base line of the trapezoid coincides with the side lines of the inscribed rectangle. The base line of the trapezoid is 0.4 mm longer than the opposite side. In view of this inclination of the area 3 ', the contact pressure of the broad side plates on the narrow side plates is first reduced when the width is adjusted, the narrow side plates are then moved and then the broad side plates are then pressed again. The described design of the broadside plates 1 can be used with straight and circular molds and also with curved molds with several different radii of curvature, as shown in FIG. 3 and designated R1-R4.

In der Fig. 5 ist eine Kokille dargestellt, die eingießseitig aus einem geraden Abschnitt 6 mit anschließendem bogenförmigen Teil besteht. In den geraden Abschnitt 6 der Kokille ragt der im Querschnitt länglich Tauchausguß 7 für die Schmelzenzufuhr hinein. Die Breitseitenplatten 1 werden mittels Wasser, das durch Kanäle 8 in der Rückseite dei aus Kupfer bestehenden formgebenden Wand geleitet wird, gekühlt. Die Kupferwände sind in üblicher Weise an einer nicht dargestellten Platte, die gleichzeitig die Kanäle abdeckt, über Bolzen, die in Ausnehmungen 9 eingreifen, befestigt.5, a mold is shown, the pouring side of a straight section 6 with a subsequent arcuate part consists. In the straight section 6 of the mold protrudes the immersion spout 7, which is elongate in cross section, for supplying the melt. The broad side plates 1 are cooled by means of water which is passed through channels 8 in the rear of the shaping wall consisting of copper. The copper walls are fastened in the usual way to a plate, not shown, which at the same time covers the channels, via bolts which engage in recesses 9.

Die Kühlkanäle 8 haben mindestens in der oberen Kokillenhälfte eine Tiefe derart, daß sich der Abstand der Kanalsohle 8', in der Draufsicht gesehen, von der Kokillenmitte 10 zu den Schmalseitenwänden 2 in gegenüber der der Schmelze zugekehrten Oberfläche der Breitseiteplatte 1 vergrößert.The cooling channels 8 have a depth, at least in the upper mold half, such that the distance of the channel base 8 ', seen in plan view, increases from the mold center 10 to the narrow side walls 2 in relation to the surface of the broad side plate 1 facing the melt.

In Fig. 5 schließt sich den Bereich 6 konstanter Scheitelhöhe 13, der etwa 1/3 der Kokillenhöhe umfaßt und in jedem Fall den Gießspiegelbereich überdeckt, ein Bereich an, in dem die Scheitelhöhe des Bogens sich linear zum Kokillenausgang 5 hin verringert.In FIG. 5, the region 6 of constant apex height 13, which comprises approximately 1/3 of the mold height and in any case covers the area of the mold level, is followed by a region in which the apex height of the arc decreases linearly towards the mold exit 5.

Fig. 3 zeigt eine andere Ausführungsform. Hirr besteht die Kokille aus drei Bereichen mit unterschiedlichen Scheitelhöhen 13 des Bogens. Der Bereich 6, hier auch mit L1 bezeichnet, entspricht dem, wie in Fig. 5 beschrieben. Im anschließenden Abschnitt L2, der bei L1 ungefähr der Mitte der Kokillenhöhe endet, geht die Scheitelhöhe 13 linear auf einen Betrag 14 zurück, der am Kokillenausgang 5 entspricht. Der untere Kokillenabschnitt 12 weist damit eine konstante Scheitelhöhe 13 auf.3 shows another embodiment. Hirr, the mold consists of three areas with different crown heights 13 of the arc. The area 6, here also designated L1, corresponds to that as described in FIG. 5. In the subsequent section L2, which ends approximately at the middle of the mold height at L1, the apex height 13 decreases linearly to an amount 14 which corresponds to the mold exit 5. The lower mold section 12 thus has a constant apex height 13.

Während bei den bisher beschriebenen Ausführungen eine gewisse Bombierung auch noch an der Unterkante 5 der Kokille vorhanden ist, entspricht bei der Aushführung nach den Figuren 6 - 8 die Form der Breitseiteplatten 1 an der Unterkante - also am Strangaustrittsende - der Kokille dem zu erzeugenden Strangformat. Der übergang von der bombierten Eingießseite 4 zur Unterkante 5 ergibt sich aus den in der Figuren 6 - 8 dargestellten Schritten eindeutig.While a certain crowning is also present on the lower edge 5 of the mold in the embodiments described so far, in the embodiment according to FIGS. 6-8 the shape of the broad side plates 1 on the lower edge - that is to say at the end of the strand exit - corresponds to the strand format to be produced. The transition from the cambered pouring side 4 to the lower edge 5 clearly results from the steps shown in FIGS. 6-8.

Das mit der erfindungsgemäßen Kokille realisierte Verfahren zur Erzeugung einer leicht bombierten Bramme bzw. Dünnbramme führt zu folgenden Vorteilen:

  • gleichförmiger Materialfluß des Walzgutes über die Bandbreite im Walzspalt und damit
  • hohe Profilkonstanz des Fertigbandes,
  • zentrischer Lauf der Bramme oder des Walzgutes der Kokille sowie von Rollen- bzw. Walzenpaar zu Walzenpaar.
The method for producing a slightly cambered slab or thin slab implemented with the mold according to the invention leads to the following advantages:
  • uniform material flow of the rolling stock over the bandwidth in the roll gap and thus
  • high profile consistency of the finished strip,
  • centric run of the slab or the rolling stock of the mold as well as from roller or roller pair to roller pair.

Der zentrische Lauf der Bramme der Kokille führt zu folgenden gießtechnischen Vorteilen:

  • gleichförmiger, spezifischer Wärmetransport in die Schmal- und Breiseiten-Kupferplatten, sowohl in horizontaler als auch in vertikaler Richtung,
  • gleichförmige Spaltausbildung zwischen Strangschale und Cu-Platte im Gießspiegelbereich,
  • gleichförmige Schmierfilmausbildung der Gießschlacke,
  • der Schrumpfvorgang des Stranges, besonders in Breitenrichtung, wird durch durch paralle Breitseiten-Kupferplatten eventuell behindert bzw. blockiert, sondern vielmehr durch die Bombierung erleichtert,
  • Anhebung des Temperaturprofiles über die Brammenbreite im Bereich neben den Schmalseitenkanten.
The central running of the mold slab leads to the following casting advantages:
  • uniform, specific heat transfer into the narrow and broadside copper plates, in both the horizontal and vertical directions,
  • uniform gap formation between strand shell and copper plate in the area of the mold level,
  • uniform lubricating film formation of the casting slag,
  • the shrinking process of the strand, especially in the width direction, may be hindered or blocked by parallel broad-side copper plates, but rather facilitated by the crowning,
  • Raising the temperature profile across the slab width in the area next to the narrow side edges.

Claims (11)

  1. A liquid-cooled plate chill, able to be adjusted in its width, for the continuous casting of strings of steel in slab format, in particular for a thickness of the slab of below 100 mm,
    characterised in that
    the broad side plates (1) and narrow side plates (2) of the chill, providing the shape, are constructed in the direction of their transverse extent in the sense of an increase in cross-section for the string,
    the narrow side plates (2) are arranged so as to be substantially parallel to each other over the height of the chill,
    the broad side plates (1) are constructed so as to be concave at least in a region (3) of the smallest slab width, such that in cross-section the vertex height (13) of the chill wall, forming an arc, with respect to an inscribed rectangle on the pouring-in side (4) of the chill, amounts to a maximum of 12 mm per 1000 mm slab width (length of chord) and the shape of the broad side plates (1) at the string outlet end (5) of the chill corresponds to the string format which is to be produced, the broad side plates (1) are constructed in the adjustment region (3') of the narrow side plates (2) as a flat surface and slit-like channels (8) are arranged in the side facing away from the shaping side.
  2. A chill according to Claim 1,
    characterised in that
    the vertex height (13) is reduced continuously from the pouring-in side (4) of the chill up to the string outlet end (5) of the chill.
  3. A chill according to Claim 1 or 2,
    characterised in that
    the vertex height (13) on the pouring-in side (4) amounts to between 5 to 12 mm.
  4. A chill according to one of Claims 1 to 3,
    characterised in that
    the broad side plates (1) are constructed so as to be concave at the string outlet end (5) of the chill such that, viewed in cross-section, the vertex height (13) of the chill wall, forming the arc, still amounts to at least 0.5 to 2 mm.
  5. A chill according to one of Claims 1 to 4,
    characterised in that
    the vertex height (13) is constant over a region (6) of one third of the chill height.
  6. A chill according to one of Claims 1 to 3 and 4,
    characterised in that
    adjoining the region (6) of constant vertex height (13) there is a further section (L2), which ends at approximately half the chill height (at 11) and in this section (L2) the vertex height (13) is reduced in a linear manner.
  7. A chill according to one of Claims 1 to 5,
    characterised in that
    adjoining the region (6) of constant vertex height (13) there is a further section (L2), which ends at approximately half the chill height (at 11) and in this section (L2) the vertex height (13) is reduced in a linear manner to an amount (14), which corresponds to the vertex height at the chill outlet (5), so that the lower chill half (12) has a curved recess of constant vertex height.
  8. A chill according to Claims 1 to 7,
    characterised in that
    the arc length of one side wall in width direction in the region (3) of minimum slab width, compared with the chord length, amounts to no more than 20 % of the shrinkage of approximately 1 %.
  9. A chill according to Claims 1 to 8,
    characterised in that
    the spacing of the channel base (8') of the channels (8) of the chill broad sides (1), seen in top view, increases from the centre of the chill (section plane B-B) towards the outer regions (3') with respect to the surface of the broad side plate (2) facing the string.
  10. A chill according to Claim 9,
    characterised in that
    the channel bases (8') of the channels (8) of the chill walls lie at least in the upper chill half in a plane parallel to the central plane (10).
  11. A chill according to one of Claims 1 to 10,
    characterised in that
    the broad side plates (1), constructed as a flat surface in the adjustment region (3') of the narrow side plates (2), are inclined towards the longitudinal central plane (10), starting from the section (3) of smallest slab width, and have a constant reciprocal spacing in each case from the pouring-in side (4) up to the lower edge (5) of the chill.
EP91916776A 1990-10-02 1991-09-23 Liquid-cooled mould for continuous casting of steel billets in slab form Revoked EP0551311B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4031691 1990-10-02
DE4031691 1990-10-02
DE4131829 1991-09-20
DE4131829A DE4131829C2 (en) 1990-10-02 1991-09-20 Liquid-cooled mold for the continuous casting of steel strands in slab format
PCT/DE1991/000761 WO1992005898A1 (en) 1990-10-02 1991-09-23 Liquid-cooled mould for continuous casting of steel billets in slab form

Publications (2)

Publication Number Publication Date
EP0551311A1 EP0551311A1 (en) 1993-07-21
EP0551311B1 true EP0551311B1 (en) 1994-11-02

Family

ID=25897500

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91916776A Revoked EP0551311B1 (en) 1990-10-02 1991-09-23 Liquid-cooled mould for continuous casting of steel billets in slab form

Country Status (9)

Country Link
US (1) US5467809A (en)
EP (1) EP0551311B1 (en)
JP (1) JP2683725B2 (en)
KR (1) KR100206298B1 (en)
AT (1) ATE113509T1 (en)
CA (1) CA2093327C (en)
DE (2) DE4131829C2 (en)
ES (1) ES2063526T3 (en)
WO (1) WO1992005898A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0539861B1 (en) * 1991-10-31 1996-08-28 DANIELI & C. OFFICINE MECCANICHE S.p.A. Crystallizer, or inner portion, of a mould having a lengthwise curvature for continuous curved casting of thin slabs
EP0865849A1 (en) * 1997-03-17 1998-09-23 Sms Schloemann-Siemag Aktiengesellschaft Oscillating mould for continuous casting of slabs
WO1999001244A1 (en) * 1997-06-30 1999-01-14 Sms Demag Ag Method and device for producing thin slabs
EP3130414A1 (en) 2015-08-10 2017-02-15 SMS group GmbH Melt metallurgy assembly, comprising a mould

Families Citing this family (16)

* 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
IT1265065B1 (en) * 1993-05-17 1996-10-30 Giovanni Arvedi PERFECTED INGOT MILL FOR CONTINUOUS STEEL CASTING, PARTICULARLY SUITABLE FOR CONTINUOUS CASTING OF THIN Slabs
DE4322948A1 (en) * 1993-07-09 1995-01-12 Schloemann Siemag Ag Continuous casting mold for casting thin slabs
DE4337399C2 (en) * 1993-10-26 1995-08-17 Mannesmann Ag Continuous casting mold for the production of thin slabs, plates or sheets made of steel
DE4403049C1 (en) * 1994-01-28 1995-09-07 Mannesmann Ag Continuous caster and method for producing thin slabs
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
DE19508169C5 (en) * 1995-03-08 2009-11-12 Kme Germany Ag & Co. Kg Mold for continuous casting of metals
IT1293817B1 (en) 1997-08-04 1999-03-10 Giovanni Arvedi INGOT MOLD FOR CONTINUOUS CASTING OF STEEL SHEETS WITH IMPROVED CONTACT
US6419005B1 (en) * 2000-06-29 2002-07-16 Vöest-Alpine Services and Technologies Corporation Mold cassette and method for continuously casting thin slabs
DE10106328A1 (en) * 2001-02-09 2002-08-14 Evertz Egon Kg Gmbh & Co Continuous casting mold for production of metal strip or thin plate has funnel-shaped casting slot enclosed between two plates and having elliptical cross-section
AU2002244616A1 (en) 2001-02-09 2002-08-28 Egon Evertz K.G. (Gmbh And Co) Continuous casting ingot mould
DE10148150B4 (en) * 2001-09-28 2014-05-22 Egon Evertz Kg (Gmbh & Co.) Liquid-cooled continuous casting mold
DE10314460B4 (en) * 2003-03-28 2006-04-20 Sms Demag Ag Method and continuous casting apparatus with a continuous casting mold for the casting of liquid metals, in particular of steel materials
US20060191661A1 (en) * 2003-10-01 2006-08-31 Zajber Adolf G Continuous casting mold for casting molten metals, particularly steel materials, at high casting rates to form polygonal billet, bloom, and preliminary section castings and the like
CN2776595Y (en) * 2005-03-07 2006-05-03 鞍钢集团新钢铁有限责任公司 Profile crystallizer for plate blank continuous casting

Family Cites Families (19)

* 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
DE898667C (en) * 1951-07-01 1953-12-03 Boehler & Co Ag Geb Device for introducing the lubricant into continuous casting molds
US2767448A (en) * 1952-06-27 1956-10-23 Babcock & Wilcox Co Continuous casting mold
GB1199805A (en) * 1967-04-20 1970-07-22 British Iron Steel Research Continuous Casting
US3763920A (en) * 1972-03-16 1973-10-09 United States Steel Corp Water inlet construction for continuous-casting molds
US3866664A (en) * 1973-06-01 1975-02-18 United States Steel Corp Mold for use in continuous-casting of metals
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
FR2583662B1 (en) * 1985-06-25 1987-09-25 Clecim Sa METHOD AND MACHINE FOR CONTINUOUS CASTING OF A THIN METAL PRODUCT
DE3601501C3 (en) * 1986-01-20 2000-10-05 Sms Demag Ag Mold for the continuous casting of steel strip
KR950014347B1 (en) * 1986-02-27 1995-11-25 에스 엠 에스 슐레만-지이마크 악티엔게젤샤프트 Method and apparatus for continuously casting strip
US4716955A (en) * 1986-06-11 1988-01-05 Sms Concast Inc. Continuous casting method
DE3627991A1 (en) * 1986-08-18 1988-02-25 Mannesmann Ag METHOD FOR CONTINUOUSLY MOLDING SLABS AND DEVICE FOR CARRYING OUT THE METHOD
DE3640525C2 (en) * 1986-11-27 1996-02-15 Schloemann Siemag Ag Mold for the continuous casting of steel strip
DE3724628C1 (en) * 1987-07-22 1988-08-25 Mannesmann Ag Continuous casting mold for producing thin slabs in slab format
JPS6475146A (en) * 1987-09-14 1989-03-20 Kawasaki Steel Co Mold for round billet continuous casting
AT389251B (en) * 1987-12-23 1989-11-10 Voest Alpine Ind Anlagen COOLING OF A CONTINUOUS CASTING CHILL
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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0539861B1 (en) * 1991-10-31 1996-08-28 DANIELI & C. OFFICINE MECCANICHE S.p.A. Crystallizer, or inner portion, of a mould having a lengthwise curvature for continuous curved casting of thin slabs
EP0865849A1 (en) * 1997-03-17 1998-09-23 Sms Schloemann-Siemag Aktiengesellschaft Oscillating mould for continuous casting of slabs
WO1999001244A1 (en) * 1997-06-30 1999-01-14 Sms Demag Ag Method and device for producing thin slabs
EP3130414A1 (en) 2015-08-10 2017-02-15 SMS group GmbH Melt metallurgy assembly, comprising a mould
DE102015215187A1 (en) 2015-08-10 2017-02-16 Sms Group Gmbh Melt metallurgical plant comprising a mold

Also Published As

Publication number Publication date
CA2093327A1 (en) 1992-04-03
DE4131829A1 (en) 1992-04-16
KR100206298B1 (en) 1999-07-01
JP2683725B2 (en) 1997-12-03
CA2093327C (en) 2002-06-25
EP0551311A1 (en) 1993-07-21
DE4131829C2 (en) 1993-10-21
DE59103447D1 (en) 1994-12-08
KR920702263A (en) 1992-09-03
JPH06503757A (en) 1994-04-28
ES2063526T3 (en) 1995-01-01
WO1992005898A1 (en) 1992-04-16
ATE113509T1 (en) 1994-11-15
US5467809A (en) 1995-11-21

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