EP0972590B1 - Continuous casting mould - Google Patents
Continuous casting mould Download PDFInfo
- Publication number
- EP0972590B1 EP0972590B1 EP99111052A EP99111052A EP0972590B1 EP 0972590 B1 EP0972590 B1 EP 0972590B1 EP 99111052 A EP99111052 A EP 99111052A EP 99111052 A EP99111052 A EP 99111052A EP 0972590 B1 EP0972590 B1 EP 0972590B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- continuous casting
- mould
- mold
- wall
- casting mould
- 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
Links
- 238000009749 continuous casting Methods 0.000 title claims description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 2
- 238000005253 cladding Methods 0.000 claims 4
- 238000005266 casting Methods 0.000 abstract description 11
- 230000017525 heat dissipation Effects 0.000 description 11
- 210000001015 abdomen Anatomy 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000161 steel melt Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000005499 meniscus Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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
- B22D11/059—Mould materials or platings
-
- 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 continuous casting mold for the manufacture of slabs, which has water-cooled narrow and broad side walls, in particular for the manufacture of thin slabs, in which case a pouring funnel is formed in the broad side walls thereof, which are made of copper plates, on the inside, between an area that runs parallel to the two narrow sides and on the other hand cooling grooves are provided on the outside or on the back.
- the thin slabs produced on continuous casting plants serve as preliminary strips for the production of hot wide strip with final thicknesses between, for example, 1 to 12 mm.
- the funnel-shaped mold with the immersion tube immersed in the pouring funnel is at the heart of the CSP casting process.
- the heat dissipation in the area of the bath level and the service life of the mold are of particular importance here, since in the mold with the first solidification that begins there, the via the immersion tube supplied molten steel melt the surface quality of the thin slab strand is significantly influenced. These criteria apply equally to the production of slabs of the dimension range 320 to 150 x 3,000 to 800 mm with the aid of a plate mold which then generally does not require a pouring funnel.
- the strand shell growth is essentially determined by the casting powder, the copper wall thickness between the cooling channel and the working side and the flow speed in the cooling channels. It has been shown that the main cause for the development of longitudinal cracks in the strand shell, there is an irregular and / or excessive heat dissipation across the width and height in the upper mold area. The uneven heat dissipation is due to different thicknesses of the lubricating film between the strand shell and the copper wall.
- the invention has for its object to provide a continuous casting mold of the type mentioned, with which the surface quality of the thin slab to be cast can be improved, in particular the occurrence of longitudinal cracks avoided, at least minimized.
- the rear sides of the broad side walls are reinforced starting from below the deepest level of the bath level by a largest armor there, tapering increasingly in the continuous casting direction.
- the one introduced into the mold leads; on the mold walls solidifying steel melt to the known temperature profile, the so-called temperature belly in the mold plate.
- the armor according to the invention the starting point of which is determined taking into account the contour of the bath level, which is dependent on the casting speed, and which after one previous rise or transition over a short distance in the casting direction begins about 20 to 50 mm below the meniscus with its greatest thickness, reduce the rather rapid temperature drop below the temperature belly.
- the mitigation of the temperature drop can be further promoted. Because after the short climb, the first section, about 20 to 100 mm long, with maximum armor thickness, which can be 3 to 15 mm depending on requirements, is where the heat dissipation is otherwise too high and prevents thicker armouring here thus that the heat dissipation from the cooling water side is forced beyond charge.
- An embodiment of the invention provides that the wall armor decreases as far as the transition from the pouring funnel to the mold-determining end section which adjoins this in the continuous casting direction. In this way it is achieved that the copper wall thickness in front of water decreases over the length of the cooling grooves and thus the heat dissipation over the mold height can be influenced in a targeted manner.
- the thickness of the wall armor varies over the mold width and height in accordance with the temperature distribution in the mold.
- the thus different course of the groove geometry in the copper plate favors the desired temperature equalization over the height and width of the mold by armoring designed according to the temperature decrease depending on the casting parameters.
- FIG. 1 One of the two complementary broad side walls 2 is shown schematically in FIG. 1 of a continuous casting mold 1 of a casting machine for producing thin slabs which is known as such. These are designed to hold a dip tube (not shown) on the inside with a pouring funnel 3 and on their outside with cooling grooves 4 through which water flows (cf. also FIG. 3).
- the edge regions 5 of the two complementary broad side walls 2, each of which extends towards the narrow sides next to the pouring funnel 3, run parallel to one another.
- the mold walls pass into the format-determining casting cross section 7 (cf. FIG. 3).
- the liquid steel melt introduced into the continuous casting mold 1 up to the bath level 8 cools down over the height of the mold with a very rapid temperature drop, which leads to stresses in the continuous shell forming in the continuous casting direction 6, which cause longitudinal cracks, which primarily occur in the continuous shell up to about 150 mm below the bath level 8 can be determined.
- the bath level 8 is at a distance of, for example, 20 to 60 mm from the The upper edge of the mold, and starting from this, characterizes the cooling behavior of the molten steel melt, which in the mold plates leads to a so-called temperature belly 9, shown schematically in FIG. 2, the curve characterizing this showing the significant temperature drop below it.
- the rear sides 10 of the broad side walls 2 have been reinforced by a wall armor 11, which tapers in the continuous casting direction and with their wedge tip, compared to the contour hitherto shown in dashed lines in FIG. 1 approximately in the transition 12 (see FIG. 3) from the pouring funnel 3 to the subsequent format-determining pouring cross section 7.
- the wall armor 11 is about 20 to 50 mm below the deepest bath level 8, as shown in Fig. 3 according to the developing meniscus of the bath level, and its course is adjusted across the width of the mold.
- the head end 11 a - which is preceded by a transition that rises over a short distance - the wall armor 11 thus still protrudes into the region of the temperature bulb 9 and extends in this uppermost section over a distance 13 of approximately 20 to 100 mm parallel to the mold wall before it then changes into the tapering slope.
- the wall armouring 11 which varies not only over the height but also over the width of the continuous casting mold and decreases steadily in the continuous casting direction 6, the working temperature is increased in the sections with a thicker wall armouring and thus in particular the abrupt drop in temperature below the " Club "of the temperature belly 9 significantly weakened, ie the heat dissipation over the height and width of the continuous casting mold 1 is evened out.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Led Devices (AREA)
Abstract
Description
Die Erfindung betrifft eine Stranggießkokille zum Herstellen von Brammen, die wassergekühlte Schmal- und Breitseitenwände aufweist, insbesondere zum Herstellen von Dünnbrammen, wobei dann in deren aus Kupferplatten bestehenden Breitseitenwänden einerseits innen, zwischen einem zu den beiden Schmalseiten hin jeweils parallel auslaufenden Bereich, ein Eingießtrichter ausgebildet ist und andererseits außen bzw. rückseitig Kühlnuten vorgesehen sind.The invention relates to a continuous casting mold for the manufacture of slabs, which has water-cooled narrow and broad side walls, in particular for the manufacture of thin slabs, in which case a pouring funnel is formed in the broad side walls thereof, which are made of copper plates, on the inside, between an area that runs parallel to the two narrow sides and on the other hand cooling grooves are provided on the outside or on the back.
Die auf Stranggießanlagen hergestellten Dünnbrammen dienen als Vorbänder zur-Erzeugung von Warmbreitband mit Enddicken zwischen beispielsweise 1 bis 12 mm. Dies geschieht in einer Hitze auf bekannten, sogenannten CSP-(Compact Strip Production) Anlagen, bei denen die Gießmaschine mit einem Ausgleichsofen und einer nachgeschaiteten Walzstraße in einer Linie kombiniert wird (vgl. z.B. DE-Z "Stahl u. Eisen 108 (1988), Nr. 3, Seiten 99 bis 109"). Hierbei stellt die trichterförmige Kokille mit dem in den Eingießtrichter eintauchenden Tauchrohr das Kernstück des CSP-Gießprozesses dar. Der Wärmeabfuhr im Badspiegelbereich und der Standzeit der Kokille kommt hierbei eine besondere Bedeutung zu, da in der Kokille mit der dort einsetzenden ersten Erstarrung der über das Tauchrohr zugeführten flüssigen Stahlschmelze die Oberflächenqualität des Dünnbrammenstranges maßgeblich beeinfußt wird. Diese Kriterien gelten in gleichem Maße bei der Erzeugung von Brammen des Abmessungsbereiches 320 bis 150 x 3.000 bis 800 mm mit Hilfe einer dann in der Regel keinen Eingießtrichter erfordernden Plattenkokille.The thin slabs produced on continuous casting plants serve as preliminary strips for the production of hot wide strip with final thicknesses between, for example, 1 to 12 mm. This takes place in heat on known, so-called CSP (Compact Strip Production) systems, in which the casting machine is combined with a compensating furnace and a downstream rolling mill in one line (see, for example, DE-Z "Stahl u. Eisen 108 (1988) , No. 3, pages 99 to 109 "). The funnel-shaped mold with the immersion tube immersed in the pouring funnel is at the heart of the CSP casting process. The heat dissipation in the area of the bath level and the service life of the mold are of particular importance here, since in the mold with the first solidification that begins there, the via the immersion tube supplied molten steel melt the surface quality of the thin slab strand is significantly influenced. These criteria apply equally to the production of slabs of the dimension range 320 to 150 x 3,000 to 800 mm with the aid of a plate mold which then generally does not require a pouring funnel.
Das Strangschalenwachstum wird im wesentlichen vom Gießpulver, der Kupferwandstärke zwischen dem Kühlkanal und der Arbeitsseite sowie der Strömungsgeschwindigkeit in den Kühlkanälen bestimmt. Es hat sich gezeigt, daß die wesentiche Ursache für das Entstehen von Längsrissen in der Strangschale eine ungieichmäßige und/oder zu hohe Wärmeabfuhr über die Breite und Höhe im oberen Kokillenbereich ist. Die ungleiche Wärmeabfuhr ist durch unterschiedliche Dicken des Schmierfilms zwischen der Strangschale und der Kupferwand bedingt..The strand shell growth is essentially determined by the casting powder, the copper wall thickness between the cooling channel and the working side and the flow speed in the cooling channels. It has been shown that the main cause for the development of longitudinal cracks in the strand shell, there is an irregular and / or excessive heat dissipation across the width and height in the upper mold area. The uneven heat dissipation is due to different thicknesses of the lubricating film between the strand shell and the copper wall.
Aus Qualitätsgründen werden auf CSP-Anlagen für die Kokillen Kupferwände mit einer Dicke von z.B. 25 mm und 15 mm eingesetzt; die jeweilige Auslegung hängt wesentlich von den Strangabmessungen und der Gießgeschwindigkeit. ab, aus denen sich die für die Strangschalenbildung erforderliche Wärmeabfuhr ergibt.For quality reasons, copper walls with a thickness of e.g. 25 mm and 15 mm used; the respective design essentially depends on the strand dimensions and the casting speed. from which the heat dissipation required for the formation of strand shells results.
Der Erfindung liegt die Aufgabe zugrunde, eine Stranggießkokille der eingangs genannten Art zu schaffen, mit der sich die Oberflächenqualität der zu gießenden Dünnbramme verbessern, insbesondere das Auftreten von Längsrissen vermeiden, zumindest minimieren läßt.The invention has for its object to provide a continuous casting mold of the type mentioned, with which the surface quality of the thin slab to be cast can be improved, in particular the occurrence of longitudinal cracks avoided, at least minimized.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Rückseiten der Breitseitenwände ausgehend von unterhalb der tiefsten Badspiegellage durch eine dort größte, in Stranggießrichtung sich zunehmend verjüngende Wand-Aufpanzerung verstärkt sind. Beim Stranggießen führt die in die Kokille eingeleitete; an den Kokillenwänden erstarrende Stahlschmelze zu dem bekannten Temperaturprofil, dem sogenannten Temperaturbauch in der Kokillenplatte. Im Gegensatz zu einem ansonsten über die Höhe sehr schnellen Temperaturabfall im Anschluß an diesen Temperaturbauch im Bereich bis etwa 100 mm unterhalb des Badspiegels läßt sich durch die erfindungsgemäße Aufpanzerung, deren Ausgangspunkt unter Berücksichtigung der Kontur des von der Gießgeschwindigkeit abhängigen Badspiegels festgelegt wird und die nach einem vorherigen Anstieg bzw. Übergang über eine kurze Strecke in Gießrichtung etwa 20 bis 50 mm unter dem Meniskus mit ihrer größten Dicke beginnt, der recht schnelle Temperaturabfall unterhalb des Temperaturbauches verringern.This object is achieved in that the rear sides of the broad side walls are reinforced starting from below the deepest level of the bath level by a largest armor there, tapering increasingly in the continuous casting direction. During continuous casting, the one introduced into the mold leads; on the mold walls solidifying steel melt to the known temperature profile, the so-called temperature belly in the mold plate. In contrast to an otherwise very rapid temperature drop following this temperature belly in the range up to about 100 mm below the bath level, the armor according to the invention, the starting point of which is determined taking into account the contour of the bath level, which is dependent on the casting speed, and which after one previous rise or transition over a short distance in the casting direction begins about 20 to 50 mm below the meniscus with its greatest thickness, reduce the rather rapid temperature drop below the temperature belly.
Durch die Erhöhung der Kupferwanddicke unterhalb des Badspiegels wird dort die Wärmeabfuhr reduziert und der Entstehung von Längsrissen durch eine geringere thermische Belastung der Strangschale entgegengewirkt. Die schon im Abschnitt des Temperaturbauches einsetzende Aufpanzerung bzw. dickere Wandstärke verhindert dort nämlich eine übermäßig hohe Wärmeabfuhr, die erst mit der sich zunehmenden, nach unten keilförmig auslaufenden Verjüngung und der dort dünner werdenden Platten- bzw. Wanddicke entsprechend stetig wieder vergrößert wird, so daß sich insgesamt eine Angleichung im Sinne eines für den Längsrißbefall unschädlichen Temperaturunterschieds erreichen läßt.By increasing the copper wall thickness below the bath level, the heat dissipation is reduced there and the formation of longitudinal cracks by a smaller one counteracted thermal stress on the strand shell. The armouring or thicker wall thickness already beginning in the section of the temperature belly prevents excessive heat dissipation there, which is only increased again and again with the increasing, tapering downward tapering and the thinning plate or wall thickness there, so that overall, an adjustment can be achieved in the sense of a temperature difference that is harmless to the longitudinal crack attack.
Wenn nach einer vorteilhaften Ausgestaltung der Erfindung ein in seiner Länge begrenztes Kopfende der Wand-Aufpanzerung parallel zur Kokillenwand verläuft, läßt sich die Milderung des Temperaturabfalls weiter begünstigen. Denn dieser nach dem kurzen Anstieg erste, etwa 20 bis 100 mm lange Abschnitt mit maximaler Dicke der Aufpanzerung, die je nach Anforderung 3 bis 15 mm betragen kann, liegt damit dort, wo die Wärmeabfuhr ansonsten zu hoch ist, und die hier dickere Aufpanzerung verhindert somit, daß die Wärmeabfuhr von der Kühlwasserseite her über Gebühr forciert wird.If, according to an advantageous embodiment of the invention, a head end of the wall armor that is limited in length runs parallel to the mold wall, the mitigation of the temperature drop can be further promoted. Because after the short climb, the first section, about 20 to 100 mm long, with maximum armor thickness, which can be 3 to 15 mm depending on requirements, is where the heat dissipation is otherwise too high and prevents thicker armouring here thus that the heat dissipation from the cooling water side is forced beyond charge.
Eine Ausführung der Erfindung sieht vor, daß die Wand-Aufpanzerung bis hin zum Übergang vom Eingießtrichter zu dem sich diesem in Stranggießrichtung anschließenden, formatbestimmenden Kokillenendabschnitt abnimmt. Auf diese Weise wird erreicht, daß die Kupferwandstärke vor Wasser über die Länge der Kühlnuten abnimmt und damit die Wärmeabfuhr über die Kokillenhöhe gezielt beeinflußt werden kann.An embodiment of the invention provides that the wall armor decreases as far as the transition from the pouring funnel to the mold-determining end section which adjoins this in the continuous casting direction. In this way it is achieved that the copper wall thickness in front of water decreases over the length of the cooling grooves and thus the heat dissipation over the mold height can be influenced in a targeted manner.
Nach einer weiteren Ausgestaltung der Erfindung variiert die Dicke der Wand-Aufpanzerung über die Kokillenbreite und -höhe entsprechend der Temperaturverteilung in der Kokille. Der somit unterschiediche Verlauf der Nutgeometrie in der Kupferplatte begünstigt die angestrebte Temperatur-Vergleichmäßigung über die Höhe und Breite der Kokille durch eine entsprechend der Temperaturabnahme in Abhängigkeit der Gießparameter ausgelegte Aufpanzerung.According to a further embodiment of the invention, the thickness of the wall armor varies over the mold width and height in accordance with the temperature distribution in the mold. The thus different course of the groove geometry in the copper plate favors the desired temperature equalization over the height and width of the mold by armoring designed according to the temperature decrease depending on the casting parameters.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Patentansprüchen und der nachfolgenden Beschreibung, in der ein Ausführungsbeispiel des Gegenstandes der Erfindung mit einer Kokille zum Herstellen von Dünnbrammen näher erläutert ist. Es zeigen:
- Fig. 1
- einen Längsschnitt durch eine Breitseitenwand einer Stranggießkokille;
- Fig. 2
- als Einzelheit den in Fig. 1 strichpunktiert eingekreisten oberen Teil der Kokillenwand; und
- Fig. 3
- die Kokillen-Breitseitenwand gemäß Fig 1 von links her gesehen mit darüber abgesetzt als Einzelheit schematisch dargestellten rückseitigen Kühlnuten.
- Fig. 1
- a longitudinal section through a broad side wall of a continuous casting mold;
- Fig. 2
- as a detail the upper part of the mold wall encircled by dash-dotted lines in FIG. 1; and
- Fig. 3
- the mold broad side wall according to FIG. 1 seen from the left with cooling grooves depicted schematically as a detail above it.
Von einer als solche hinlänglich bekannten Stranggießkokille 1 einer Gießmaschine zum Herstellen von Dünnbrammen ist in Fig 1 eine der beiden sich komplementär gegenüberliegenden Breitseitenwände 2 schematisch dargestellt. Diese sind zur Aufnahme eines nicht dargestellten Tauchrohres an den Innenseiten mit einem Eingießtrichter 3 ausgebildet und an ihren Außenseiten mit von Wasser durchströmten Kühlnuten 4 versehen (vgl. auch Fig. 3). Die sich neben dem Eingießtrichter 3 jeweils zu den Schmalseiten hin erstreckenden Randbereiche 5 der beiden komplementären Breitseitenwände 2 verlaufen parallel zueinander. In Stranggießrichtung 6 unterhalb des Eingießtrichters 3 gehen die Kokillenwände in den formatbestimmenden Gießquerschnitt 7 (vgl. Fig. 3) über.One of the two complementary broad side walls 2 is shown schematically in FIG. 1 of a continuous casting mold 1 of a casting machine for producing thin slabs which is known as such. These are designed to hold a dip tube (not shown) on the inside with a pouring funnel 3 and on their outside with cooling grooves 4 through which water flows (cf. also FIG. 3). The edge regions 5 of the two complementary broad side walls 2, each of which extends towards the narrow sides next to the pouring funnel 3, run parallel to one another. In the continuous casting direction 6 below the pouring funnel 3, the mold walls pass into the format-determining casting cross section 7 (cf. FIG. 3).
Die in die Stranggießkokille 1 bis zum Badspiegel 8 eingeleitete flüssige Stahlschmelze erkaltet über die Höhe der Kokille mit einem sehr schnellen Temperaturabfall, der zu Spannungen in der sich in Stranggießrichtung 6 zunehmend ausbildenden Strangschale führt, die Längsrisse verursachen, die in der Strangschale vorrangig bis etwa 150 mm unterhalb der Badspiegels 8 festzustellen sind. Der Badspiegel 8 befindet sich je nach Gießparameter in einem Abstand von z.B. 20 bis 60 mm von der Oberkante der Kokille, und ausgehend davon charakterisiert sich das Abkühlverhalten der flüssigen Stahlschmelze, die in den Kokillenplatten zu einem sogenannten, in Fig. 2 schematisch eingezeichneten Temperaturbauch 9 führt, wobei der diesen kennzeichnenden Kurve der darunter deutliche Temperaturabfall zu entnehmen ist.The liquid steel melt introduced into the continuous casting mold 1 up to the bath level 8 cools down over the height of the mold with a very rapid temperature drop, which leads to stresses in the continuous shell forming in the continuous casting direction 6, which cause longitudinal cracks, which primarily occur in the continuous shell up to about 150 mm below the bath level 8 can be determined. Depending on the casting parameters, the bath level 8 is at a distance of, for example, 20 to 60 mm from the The upper edge of the mold, and starting from this, characterizes the cooling behavior of the molten steel melt, which in the mold plates leads to a so-called temperature belly 9, shown schematically in FIG. 2, the curve characterizing this showing the significant temperature drop below it.
Um eine bei herkömmlichen Stranggießkokillen gemäß der Kurve im Anschluß an den Temperaturbauch 9 deutlich abfallende Kokillentemperatur zu vermeiden und eine Temperatur-Vergleichmäßigung, d.h. eine über die Höhe der Stranggießkokille 1 angenähert gleiche Wärmeabfuhr zu erreichen, sind die Rückseiten 10 der Breitseitenwände 2 gegenüber der bisher üblichen, in Fig. 1 gestrichelt angedeuteten Kontur durch eine Wand-Aufpanzerung 11 verstärkt worden, die sich in Stranggießrichtung verjüngt und mit ihrer Keilspitze etwa im Übergang 12 (vgl. Fig. 3) vom Eingießtrichter 3 zu dem sich anschließenden formatbestimmenden Gießquerschnitt 7 endet. Die Wand-Aufpanzerung 11 setzt etwa 20 bis 50 mm unterhalb dertiefsten Badspiegellage 8 an, wie in Fig. 3 entsprechend dem sich ausbildenden Meniskus des Badspiegels verdeutlicht, und wird dessen Verlauf über die Breite der Kokille angepaßt. Das Kopfende 11 a - dem ein über eine kurze Strecke ansteigender Übergang vorgeschaltet ist - der Wandaufpanzerung 11 ragt damit noch in den Bereich des Temperaturbauches 9 hinein und erstreckt sich in diesem obersten Abschnitt über eine Streckenlänge 13 von ca. 20 bis 100 mm parallel zur Kokillenwand, bevor sie dann in den sich verjüngenden Neigungsverlauf übergeht.In order to avoid a significantly falling mold temperature in conventional continuous casting molds according to the curve following the temperature belly 9 and a temperature equalization, i.e. To achieve approximately the same heat dissipation over the height of the continuous casting mold 1, the rear sides 10 of the broad side walls 2 have been reinforced by a wall armor 11, which tapers in the continuous casting direction and with their wedge tip, compared to the contour hitherto shown in dashed lines in FIG. 1 approximately in the transition 12 (see FIG. 3) from the pouring funnel 3 to the subsequent format-determining pouring cross section 7. The wall armor 11 is about 20 to 50 mm below the deepest bath level 8, as shown in Fig. 3 according to the developing meniscus of the bath level, and its course is adjusted across the width of the mold. The head end 11 a - which is preceded by a transition that rises over a short distance - the wall armor 11 thus still protrudes into the region of the temperature bulb 9 and extends in this uppermost section over a distance 13 of approximately 20 to 100 mm parallel to the mold wall before it then changes into the tapering slope.
Aufgrund der Wand-Aufpanzerung 11, die nicht nur über die Höhe sondern auch über die Breite der Stranggießkokille variiert und in Stranggießrichtung 6 stetig abnimmt, wird die Arbeitstemperatur in den Abschnitten mit einer dickeren Wand-Aufpanzerung angehoben und damit insbesondere der schroffe Temperaturabfall unterhalb der "Keule" des Temperaturbauches 9 deutlich abgeschwächt, d.h. die Wärmeabfuhr über die Höhe und Breite der Stranggießkokille 1 wird vergleichmäßigt.Due to the wall armouring 11, which varies not only over the height but also over the width of the continuous casting mold and decreases steadily in the continuous casting direction 6, the working temperature is increased in the sections with a thicker wall armouring and thus in particular the abrupt drop in temperature below the " Club "of the temperature belly 9 significantly weakened, ie the heat dissipation over the height and width of the continuous casting mold 1 is evened out.
Claims (4)
- Continuous casting mould for producing slabs, which has water-cooled narrow and wide side walls, particularly for producing thin slabs, wherein in the wide side walls (2) thereof, which consist of copper plates, then a pouring funnel (3) is formed on the one hand at the inside between a respective region running parallelly towards the two narrow sides and cooling grooves (4) are provided on the other hand at the outside or rear side, characterised in that the rear sides (10) of the wide side walls (2) are reinforced, going out from below a deepest bath level position (8), by a wall cladding (11) which is largest there and increasingly tapers in strand pouring direction (6).
- Continuous casting mould according to claim 1, characterised in that the wall cladding (11) decreases up to the transition (12) from the pouring funnel (3) to the mould end section (7) adjoining this in strand pouring direction (6).
- Continuous casting mould according to claim 1 or 2, characterised in that the wall cladding (11) varies over the mould width and mould height in correspondence with the temperature distribution in the mould.
- Continuous casting mould according to one of claims 1 to 3, characterised in that a head end (11a), which is limited in its length, of the wall cladding (11) extends parallel to the mould wall.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19831998A DE19831998A1 (en) | 1998-07-16 | 1998-07-16 | Continuous casting mold |
| DE19831998 | 1998-07-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0972590A1 EP0972590A1 (en) | 2000-01-19 |
| EP0972590B1 true EP0972590B1 (en) | 2004-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99111052A Expired - Lifetime EP0972590B1 (en) | 1998-07-16 | 1999-06-14 | Continuous casting mould |
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| Country | Link |
|---|---|
| US (1) | US6474401B1 (en) |
| EP (1) | EP0972590B1 (en) |
| JP (1) | JP4836303B2 (en) |
| AT (1) | ATE262993T1 (en) |
| DE (2) | DE19831998A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003035306A1 (en) * | 2001-10-18 | 2003-05-01 | Sms Demag Aktiengesellschaft | Method and device for optimizing the cooling capacity of a continuous casting mold for liquid metals, particularly for liquid steel |
| DE10304543B3 (en) * | 2003-02-04 | 2004-05-27 | Sms Demag Ag | Continuous casting of liquid metals, especially liquid steel, comprises partially reducing the heat transfer number during cooling in the region of the heat flow shadow of the submerged nozzle |
| CN1292858C (en) * | 2004-01-17 | 2007-01-03 | 宝山钢铁股份有限公司 | Water-cooled metal continuous-casting crystallizer |
| US7000676B2 (en) * | 2004-06-29 | 2006-02-21 | Alcoa Inc. | Controlled fluid flow mold and molten metal casting method for improved surface |
| DE102006036708A1 (en) * | 2006-08-05 | 2008-02-07 | Sms Demag Ag | Continuous casting mold for liquid metals, in particular for liquid steel materials |
| EP2679321A4 (en) * | 2011-02-25 | 2016-11-09 | Toho Titanium Co Ltd | Melting furnace for smelting metal |
| CN105057613B (en) * | 2015-09-15 | 2018-07-06 | 西峡龙成特种材料有限公司 | A kind of sheet billet continuous casting chamber crystallizer narrow-surface copper |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5280229A (en) * | 1975-12-27 | 1977-07-05 | Ono Atsumi | Mould for continuous casting |
| JPS6027572Y2 (en) * | 1981-09-03 | 1985-08-20 | 合同製鉄株式会社 | Continuous casting mold |
| JPS61195746A (en) * | 1985-02-25 | 1986-08-30 | Sumitomo Metal Ind Ltd | Mold for continuous casting |
| 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 |
| US5176197A (en) * | 1990-03-30 | 1993-01-05 | Nippon Steel Corporation | Continuous caster mold and continuous casting process |
| DE4233522A1 (en) * | 1992-04-04 | 1993-10-07 | Schloemann Siemag Ag | Process for producing a wide mold side wall for a thin slab caster |
| US5467810A (en) * | 1994-04-01 | 1995-11-21 | Acutus Industries | Continuous metal casting mold |
| IT1267243B1 (en) * | 1994-05-30 | 1997-01-28 | Danieli Off Mecc | CONTINUOUS CASTING PROCEDURE FOR PERITECTIC STEELS |
| JPH1058093A (en) * | 1996-08-23 | 1998-03-03 | Sumitomo Metal Ind Ltd | Method for continuously casting steel |
-
1998
- 1998-07-16 DE DE19831998A patent/DE19831998A1/en not_active Withdrawn
-
1999
- 1999-06-14 AT AT99111052T patent/ATE262993T1/en active
- 1999-06-14 DE DE59908998T patent/DE59908998D1/en not_active Expired - Lifetime
- 1999-06-14 EP EP99111052A patent/EP0972590B1/en not_active Expired - Lifetime
- 1999-07-08 JP JP19476099A patent/JP4836303B2/en not_active Expired - Fee Related
- 1999-07-08 US US09/349,634 patent/US6474401B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000033461A (en) | 2000-02-02 |
| US6474401B1 (en) | 2002-11-05 |
| EP0972590A1 (en) | 2000-01-19 |
| ATE262993T1 (en) | 2004-04-15 |
| JP4836303B2 (en) | 2011-12-14 |
| DE59908998D1 (en) | 2004-05-06 |
| DE19831998A1 (en) | 2000-01-20 |
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