EP0912271A1 - Liquid-cooled mould - Google Patents

Liquid-cooled mould

Info

Publication number
EP0912271A1
EP0912271A1 EP97924881A EP97924881A EP0912271A1 EP 0912271 A1 EP0912271 A1 EP 0912271A1 EP 97924881 A EP97924881 A EP 97924881A EP 97924881 A EP97924881 A EP 97924881A EP 0912271 A1 EP0912271 A1 EP 0912271A1
Authority
EP
European Patent Office
Prior art keywords
mold according
copper
chill mold
copper plates
plates
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.)
Granted
Application number
EP97924881A
Other languages
German (de)
French (fr)
Other versions
EP0912271B1 (en
Inventor
Wolfgang Stagge
Gerhard HUGENSCHÜTT
Franz Keiser
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.)
KM Europa Metal AG
Original Assignee
KM Europa Metal AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19716450A external-priority patent/DE19716450A1/en
Application filed by KM Europa Metal AG filed Critical KM Europa Metal AG
Publication of EP0912271A1 publication Critical patent/EP0912271A1/en
Application granted granted Critical
Publication of EP0912271B1 publication Critical patent/EP0912271B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • 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
    • B22D11/0406—Moulds with special profile
    • 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
    • B22D11/059—Mould materials or platings

Definitions

  • a liquid-cooled mold of the type in question is used for the continuous casting of thin steel slabs, the cross-sectional length of which is a multiple of the cross-sectional width.
  • At least each broad side wall is composed of a copper plate delimiting the mold cavity and a steel support plate.
  • the copper plate is attached to the support plate by means of transversely protruding metal bolts. To do this, the metal bolts penetrate the holes in the support plate. Extended areas are provided at the end of the holes, in which nuts can be screwed onto the threaded ends of the metal bolts. With their help, the copper plate is pulled firmly to the support plate.
  • the invention is based on the object of creating a liquid-cooled mold for high casting speeds, in particular for continuous steel casting close to the final dimensions, in which the strength problems in the area of the connections of the metal bolts to the copper plates are significantly reduced. According to the invention, this object is achieved in the features of claim 1.
  • the key point of the invention is the measure of specifically forming the metal bolts from a CuNiFe alloy.
  • metal bolts On account of such, in particular hard-drawn, metal bolts, considerable increases in strength are now achieved with only little scatter in the strength in the welded connections to the copper plate.
  • This can be made of pure copper, for example SF-Cu, or of a high-temperature resistant copper alloy, e.g. B. consist of a hardenable copper alloy with additions of chromium and / or zirconium.
  • the hitherto unsafe handling and the many influencing factors during welding, which involve a 100% inspection, are no longer required.
  • the metal bolts consist of a CuNi30Mn1 Fe material.
  • the metal studs are welded onto the copper plates using a filler metal.
  • nickel is used here as a filler material (claim 5).
  • the filler metal can be inserted as a foil between the metal studs and the copper plates. It is also possible to provide the copper plates with the filler metal at the connection points or to coat the end faces of the metal bolts. It is also possible to use nickel rings on the circumference of the metal studs as a filler metal.
  • the copper plates of the broad side walls have groove-like coolant channels which run parallel to the casting direction and are covered by the support plates. With the help of such coolant channels, an increased heat transfer from the casting side to the cooling water can be ensured, so that high
  • Coolant channels in the copper plates are used in particular when the thickness of the copper plates is sufficient to be able to introduce sufficiently large coolant channels in cross section.
  • the copper plates have cooling bores next to the coolant channels parallel to the casting direction and extending in the vertical cross-sectional planes of the metal bolts.
  • Such cooling holes can be created by mechanical deep drilling.
  • Cooling holes transferred coolant avoids a local temperature rise of the copper plates in the vicinity of the connection areas of the metal bolts with the copper plate in continuous casting operation.
  • the cooling bores are preferably arranged in the area of the bathroom mirror.
  • the invention according to claim 9 provides that the support plates have groove-like coolant channels running parallel to the casting direction and covered by the copper plates. There are then no coolant channels in the copper plates. If necessary, a combination of coolant channels in the copper plates and in the support plates can also be used.
  • the cross section of the mold cavity is dimensioned larger at the end on the pouring side than at the end on the strand exit side.
  • the mold cavity has a multiple taper.
  • a bulge can be provided at the pour-in end of the mold cavity, which bulges in the casting direction. This bulge is used in particular to hold a dip tube.
  • Figure 1 in the schematic in vertical longitudinal section a liquid-cooled mold
  • Figure 2 is an enlarged view of a partial view of the back of a
  • FIG. 3 shows, on an enlarged scale, a partial horizontal section through a broad side wall of the mold of FIGS. 1 and
  • Figure 4 also on an enlarged scale, a partial horizontal section through a broad side wall according to another embodiment.
  • FIG. 1 denotes a liquid-cooled mold, only schematically illustrated, for the continuous casting of thin steel slabs, not shown, the cross-sectional length of which is a multiple of the cross-sectional width.
  • the mold 1 has two mutually opposing multi-layer broad side walls 2 and two likewise opposing narrow side walls 3, which form a mold cavity 4.
  • the broad side walls 2 are provided at the pouring end 5 of the mold cavity 4 with bulges 6 which are continuously deformed downwards along a partial height of the mold 1.
  • the cross section of the mold cavity 4 is rectangular and aligned with the desired thin slab cross section.
  • the purpose of the two bulges 6 lying opposite one another is to create the space required for a dip tube (not illustrated in more detail) for the supply of the molten metal.
  • each broad side wall 2 has a copper plate 8 delimiting the mold cavity 4 and a steel support plate 9.
  • the copper plate 8 as can also be seen in FIG. 2 drawn without the support plate 8, groove-like coolant channels 10 running parallel to the casting direction GR and covered by the support plate 9 and to which cooling water can be applied are provided.
  • FIGS. 2 and 3 show that cooling bores 11, which can likewise be acted upon by cooling water, extend parallel to the coolant channels 10.
  • the cooling bores 11 run in the vertical cross-sectional planes QE of metal studs 12 made of CuNi30Mn1Fe, which are fastened to the rear side 14 of the copper plate 8 by means of the stud welding process using nickel rings 13 as welding filler material.
  • the metal bolts 12 pass through bores 15 in the support plate 9.
  • By screwing nuts 16 onto the thread ends 17 of the metal bolts 12 the copper plate 8 is pulled towards the support plate 9 and fixed to it.
  • the nuts 16 lie in enlarged end sections 18 of the bores 15.
  • the coolant is fed into the cooling bores 11 via the coolant channels 10, and expediently, as shown in FIG. 2, via a branch 19 between a cooling bore 11 and the adjacent coolant channel 10.
  • FIG. 3 also shows that the coolant channels 10, in addition to the cross-sectional planes QE of the metal bolts 12, are formed deeper than the other coolant channels 10.
  • the arrangement of coolant channels 10 and cooling bores 11 in a copper plate 8 takes place when the copper plate 8 has a sufficient thickness D.
  • coolant channels 10a according to FIG. 4 are worked into the support plate 9a and covered by the copper plate 8a when the copper plate 8a is fixed to the support plate 9a with the help of the metal bolts 12.

Abstract

PCT No. PCT/DE97/00961 Sec. 371 Date Nov. 13, 1998 Sec. 102(e) Date Nov. 13, 1998 PCT Filed May 7, 1997 PCT Pub. No. WO97/43063 PCT Pub. Date Nov. 20, 1997A liquid-cooled chill mold for continuous casting of thin steel slabs is disclosed whose cross-sectional length is a multiple of the cross-sectional width, having two opposing wide side walls, each with a copper liner and a backing plate, and narrow side walls delimiting the width of the slab, with the copper liners that delimit the mold cavity being detachably attached to the backing plates by metal studs made of a CuNiFe alloy and the metal studs being welded to the copper liners.

Description

Flüssigkeitsgekühlte Kokille Liquid-cooled mold
Eine flüssigkeitsgekühlte Kokille der in Rede stehenden Art wird zum Stranggießen von dünnen Stahlbrammen verwendet, deren Querschnittslänge ein Mehrfaches der Querschnittsbreite beträgt. Zumindest jede Breitseitenwand setzt sich aus einer den Formhohlraum begrenzenden Kupferplatte und einer stählernen Stützplatte zusam¬ men. Die Kupferplatte ist mittels quer abstehender Metallbolzen an der Stützplatte befestigt. Dazu durchsetzen die Metallbolzen Bohrungen in der Stützplatte. Endsei- tig der Bohrungen sind erweiterte Bereiche vorgesehen, in denen Muttern auf die Gewindeenden der Metallbolzen geschraubt werden können. Mit deren Hilfe wird die Kupferplatte fest an die Stützplatte herangezogen.A liquid-cooled mold of the type in question is used for the continuous casting of thin steel slabs, the cross-sectional length of which is a multiple of the cross-sectional width. At least each broad side wall is composed of a copper plate delimiting the mold cavity and a steel support plate. The copper plate is attached to the support plate by means of transversely protruding metal bolts. To do this, the metal bolts penetrate the holes in the support plate. Extended areas are provided at the end of the holes, in which nuts can be screwed onto the threaded ends of the metal bolts. With their help, the copper plate is pulled firmly to the support plate.
Im Umfang der US-PS 3,709,286 ist es bekannt, die Metallbolzen aus Edelstahl zu bilden. Metallbolzen aus Edelstahl führen jedoch zu schlechten Schweißverbindun¬ gen mit der Kupferplatte, da sich an den Schweißstellen grobkörnige Gefüge ausbil¬ den. Diese sind wenig elastisch und daher sehr empfindlich gegen Biegebean- spruchungen.In the scope of US Pat. No. 3,709,286, it is known to form the metal bolts from stainless steel. Metal studs made of stainless steel, however, lead to poor welded connections to the copper plate, since coarse-grained structures form at the welds. These are not very elastic and therefore very sensitive to bending stress.
Der Erfindung liegt ausgehend vom Stand der Technik die Aufgabe zugrunde, eine flüssigkeitsgekühlte Kokille für hohe Gießgeschwindigkeiten, insbesondere für den endabmessungsnahen Stahlstrangguß, zu schaffen, bei welcher die Festigkeitspro¬ bleme im Bereich der Verbindungen der Metallbolzen mit den Kupferplatten deutlich reduziert sind. Die Lösung dieser Aufgabe besteht nach der Erfindung in den Merkmalen des An¬ spruchs 1.On the basis of the prior art, the invention is based on the object of creating a liquid-cooled mold for high casting speeds, in particular for continuous steel casting close to the final dimensions, in which the strength problems in the area of the connections of the metal bolts to the copper plates are significantly reduced. According to the invention, this object is achieved in the features of claim 1.
Kernpunkt der Erfindung bildet die Maßnahme, die Metallbolzen gezielt aus einer CuNiFe-Legierung zu bilden. Aufgrund derartiger, insbesondere hartgezogener, Metallbolzen werden jetzt erhebliche Festigkeitssteigerungen mit nur geringer Fe¬ stigkeitsstreuung in den Schweißverbindungen mit der Kupferplatte erzielt. Diese kann aus Reinkupfer, beispielsweise SF-Cu, oder aus einer hochtemperaturbestän¬ digen Kupferlegierung, z. B. einer aushärtbaren Kupferlegierung mit Zusätzen von Chrom und/oder Zirkonium bestehen. Die bislang unsichere Handhabung und die vielen Einflußfaktoren während der Schweißung, die eine 100 %-Prüfung mit sich bringen, entfallen.The key point of the invention is the measure of specifically forming the metal bolts from a CuNiFe alloy. On account of such, in particular hard-drawn, metal bolts, considerable increases in strength are now achieved with only little scatter in the strength in the welded connections to the copper plate. This can be made of pure copper, for example SF-Cu, or of a high-temperature resistant copper alloy, e.g. B. consist of a hardenable copper alloy with additions of chromium and / or zirconium. The hitherto unsafe handling and the many influencing factors during welding, which involve a 100% inspection, are no longer required.
Entsprechend einer besonders vorteilhaften Ausführungsform bestehen gemäß An¬ spruch 2 die Metallbolzen aus einem CuNi30Mn1 Fe-Material.According to a particularly advantageous embodiment, the metal bolts consist of a CuNi30Mn1 Fe material.
Zur Befestigung der Metallbolzen an den Kupferplatten wird zweckmäßig das an sich bekannte Bolzenschweißverfahren eingesetzt (Anspruch 3).For fastening the metal bolts to the copper plates, the known stud welding method is expediently used (claim 3).
Um die Festigkeit und Zähigkeit der Schweißverbindung zu verbessern, sind nach Anspruch 4 die Metallbolzen unter Verwendung eines Schweißzusatzwerkstoffs auf die Kupferplatten geschweißt.In order to improve the strength and toughness of the welded joint, the metal studs are welded onto the copper plates using a filler metal.
Insbesondere gelangt hierbei Nickel als Schweißzusatzwerkstoff zur Anwendung (Anspruch 5). Der Schweißzusatzwerkstoff kann als Folie zwischen die Metallbolzen und die Kupferplatten eingebracht werden. Ebenso ist es möglich, die Kupferplatten an den Verbindungsstellen mit dem Schweißzusatzwerkstoff zu versehen oder auch die Stirnseiten der Metallbolzen zu beschichten. Ferner ist es möglich, Nickelringe umfangsseitig der Metallbolzen als Schweißzusatzwerkstoff einzusetzen. In weiterer Ausgestaltung des erfindungsgemäßen Grundgedankens weisen ent¬ sprechend den Merkmalen des Anspruchs 6 die Kupferplatten der Breitseitenwände parallel zur Gießrichtung verlaufende, durch die Stützplatten abgedeckte nutenartige Kühlmittelkanäle auf. Mit Hilfe derartiger Kühlmittelkanäle kann ein erhöhter Wärme- transfer von der Gießseite zum Kühlwasser gewährleistet werden, so daß hoheIn particular, nickel is used here as a filler material (claim 5). The filler metal can be inserted as a foil between the metal studs and the copper plates. It is also possible to provide the copper plates with the filler metal at the connection points or to coat the end faces of the metal bolts. It is also possible to use nickel rings on the circumference of the metal studs as a filler metal. In a further embodiment of the basic idea according to the invention, in accordance with the features of claim 6, the copper plates of the broad side walls have groove-like coolant channels which run parallel to the casting direction and are covered by the support plates. With the help of such coolant channels, an increased heat transfer from the casting side to the cooling water can be ensured, so that high
Gießgeschwindigkeiten gefahren werden können. Rißbildungen in den Kupferplatten und Beschädigungen von gegebenenfalls vorhandenen Oberflächenbeschichtungen entfallen. Kühlmittelkanäle in den Kupferplatten gelangen insbesondere dann zum Einsatz, wenn die Dicke der Kupferplatten ausreicht, um querschnittsmäßig ausrei- chend große Kühlmittelkanäle einbringen zu können.Casting speeds can be driven. Cracks in the copper plates and damage to any surface coatings that may be present are eliminated. Coolant channels in the copper plates are used in particular when the thickness of the copper plates is sufficient to be able to introduce sufficiently large coolant channels in cross section.
Um auch im Bereich der Metallbolzen die Wärme intensiv ableiten zu können, ist entsprechend Anspruch 7 vorgesehen, daß die Kupferplatten neben den Kühlmit¬ telkanälen parallel zur Gießrichtung verlaufende und in den vertikalen Querschnitts¬ ebenen der Metallbolzen sich erstreckende Kühlbohrungen aufweisen. Solche Kühl- bohrungen können durch mechanisches Tiefbohren erzeugt werden. Durch dieseIn order to be able to dissipate the heat intensively also in the area of the metal bolts, it is provided according to claim 7 that the copper plates have cooling bores next to the coolant channels parallel to the casting direction and extending in the vertical cross-sectional planes of the metal bolts. Such cooling holes can be created by mechanical deep drilling. Through this
Kühlbohrungen transferiertes Kühlmittel vermeidet im Stranggießbetrieb einen loka¬ len Temperaturanstieg der Kupferplatten in der Nähe der Verbindungsbereiche der Metallbolzen mit der Kupferplatte.Cooling holes transferred coolant avoids a local temperature rise of the copper plates in the vicinity of the connection areas of the metal bolts with the copper plate in continuous casting operation.
Die Anordnung der Kühlbohrungen erfolgt gemäß Anspruch 8 bevorzugt im Bad- spiegelbereich.The cooling bores are preferably arranged in the area of the bathroom mirror.
Im Falle des Einsatzes dünner Kupferplatten, die einen sehr guten Wärmedurch¬ gang gewährleisten, sieht die Erfindung nach Anspruch 9 vor, daß die Stützplatten parallel zur Gießrichtung verlaufende, durch die Kupferplatten abgedeckte nutenar¬ tige Kühlmittelkanäle aufweisen. In den Kupferplatten sind dann keine Kühlmittelka- näle vorhanden. Gegebenenfalls kann auch eine Kombination von Kühlmittelkanälen in den Kupferplatten und in den Stützplatten zur Anwendung gelangen. Zur weiteren Erhöhung der Gießgeschwindigkeit ist nach Anspruch 10 der Quer¬ schnitt des Formhohlraum am eingießseitigen Ende größer als am strangaustritts- seitigen Ende bemessen.In the case of the use of thin copper plates which ensure a very good heat transfer, the invention according to claim 9 provides that the support plates have groove-like coolant channels running parallel to the casting direction and covered by the copper plates. There are then no coolant channels in the copper plates. If necessary, a combination of coolant channels in the copper plates and in the support plates can also be used. To further increase the casting speed, the cross section of the mold cavity is dimensioned larger at the end on the pouring side than at the end on the strand exit side.
In diesem Zusammenhang ist es dann ferner von Vorteil, wenn nach Anspruch 11 der Formhohlraum eine mehrfache Konizität aufweist.In this context, it is also advantageous if the mold cavity has a multiple taper.
Schließlich kann nach Anspruch 12 am eingießseitigen Ende des Formhohlraums eine Ausbauchung vorgesehen sein, die sich in Gießrichtung verkleinert. Diese Ausbauchung dient insbesondere der Aufnahme eines Tauchrohrs.Finally, according to claim 12, a bulge can be provided at the pour-in end of the mold cavity, which bulges in the casting direction. This bulge is used in particular to hold a dip tube.
Die Erfindung ist nachfolgend anhand von in den Zeichnungen dargestellten Ausfüh¬ rungsbeispielen näher erläutert. Es zeigen:The invention is explained in more detail below with reference to exemplary embodiments shown in the drawings. Show it:
Figur 1 im Schema im vertikalen Längsschnitt eine flüssigkeitsgekühlte Kokille;Figure 1 in the schematic in vertical longitudinal section a liquid-cooled mold;
Figur 2 in vergrößerter Darstellung eine Teilansicht auf die Rückseite einerFigure 2 is an enlarged view of a partial view of the back of a
Kupferplatte der Kokille der Figur 1 gemäß dem Pfeil II der Figur 3;Copper plate of the mold of Figure 1 according to arrow II of Figure 3;
Figur 3 in vergrößertem Maßstab einen Teil-Horizontalschnitt durch eine Breit- seitenwand der Kokille der Figur 1 und3 shows, on an enlarged scale, a partial horizontal section through a broad side wall of the mold of FIGS. 1 and
Figur 4 ebenfalls in vergrößertem Maßstab einen Teil-Horizontalschnitt durch eine Breitseitenwand gemäß einer weiteren Ausführungsform.Figure 4 also on an enlarged scale, a partial horizontal section through a broad side wall according to another embodiment.
Mit 1 ist in der Figur 1 eine nur schematisch veranschaulichte flüssigkeitsgekühlte Kokille zum Stranggießen von nicht näher dargestellten dünnen Stahlbrammen be- zeichnet, deren Querschnittslänge ein Mehrfaches der Querschnittsbreite beträgt. Die Kokille 1 weist zwei einander gegenüberliegende mehrlagige Breitseitenwände 2 und zwei ebenfalls einander gegenüberliegende Schmalseitenwände 3 auf, welche einem Formhohlraum 4 bilden. Die Breitseitenwände 2 sind am eingießseitigen Ende 5 des Formhohlraums 4 mit Ausbauchungen 6 versehen, die entlang einer Teilhöhe der Kokille 1 nach unten stetig zurückgeformt werden. Am strangaustrittsseitigen Ende 7 ist der Querschnitt des Formhohlraums 4 rechteckig und auf den gewünschten Dünnbrammenquer- schnitt ausgerichtet. Der Zweck der beiden gegenüberliegenden Ausbauchungen 6 besteht darin, den erforderlichen Platz für ein nicht näher veranschaulichtes Tauch¬ rohr für die Zufuhr der Metallschmelze zu schaffen.1 in FIG. 1 denotes a liquid-cooled mold, only schematically illustrated, for the continuous casting of thin steel slabs, not shown, the cross-sectional length of which is a multiple of the cross-sectional width. The mold 1 has two mutually opposing multi-layer broad side walls 2 and two likewise opposing narrow side walls 3, which form a mold cavity 4. The broad side walls 2 are provided at the pouring end 5 of the mold cavity 4 with bulges 6 which are continuously deformed downwards along a partial height of the mold 1. At the end 7 of the strand exit, the cross section of the mold cavity 4 is rectangular and aligned with the desired thin slab cross section. The purpose of the two bulges 6 lying opposite one another is to create the space required for a dip tube (not illustrated in more detail) for the supply of the molten metal.
Wie aus der Figur 3 näher hervorgeht, weist jede Breitseitenwand 2 eine den Form¬ hohlraum 4 begrenzende Kupferplatte 8 und eine stählerne Stützplatte 9 auf. In der Kupferplatte 8 sind, wie auch die ohne die Stützplatte 8 gezeichnete Figur 2 erken¬ nen läßt, parallel zur Gießrichtung GR verlaufende, durch die Stützplatte 9 abge¬ deckte und mit Kühlwasser beaufschlagbare nutenartige Kühlmittelkanäle 10 vorge¬ sehen.As can be seen from FIG. 3, each broad side wall 2 has a copper plate 8 delimiting the mold cavity 4 and a steel support plate 9. In the copper plate 8, as can also be seen in FIG. 2 drawn without the support plate 8, groove-like coolant channels 10 running parallel to the casting direction GR and covered by the support plate 9 and to which cooling water can be applied are provided.
Desweiteren lassen die Figuren 2 und 3 erkennen, daß sich parallel zu den Kühlmit- telkanälen 10 ebenfalls mit Kühlwasser beaufschlagbare Kühlbohrungen 11 er¬ strecken. Die Kühlbohrungen 11 verlaufen in den vertikalen Querschnittsebenen QE von Metallbolzen 12 aus CuNi30Mn1Fe, welche mittels des Bolzenschweißverfah¬ rens unter Verwendung von Nickelringen 13 als Schweißzusatzwerkstoff an der Rückseite 14 der Kupferplatte 8 befestigt sind. Die Metallbolzen 12 durchsetzen Bohrungen 15 in der Stützplatte 9. Durch Aufschrauben von Muttern 16 auf die Ge¬ windeenden 17 der Metallbolzen 12 wird die Kupferplatte 8 an die Stützplatte 9 her¬ angezogen und an dieser festgelegt. Die Muttern 16 liegen in erweiterten Endab¬ schnitten 18 der Bohrungen 15.Furthermore, FIGS. 2 and 3 show that cooling bores 11, which can likewise be acted upon by cooling water, extend parallel to the coolant channels 10. The cooling bores 11 run in the vertical cross-sectional planes QE of metal studs 12 made of CuNi30Mn1Fe, which are fastened to the rear side 14 of the copper plate 8 by means of the stud welding process using nickel rings 13 as welding filler material. The metal bolts 12 pass through bores 15 in the support plate 9. By screwing nuts 16 onto the thread ends 17 of the metal bolts 12, the copper plate 8 is pulled towards the support plate 9 and fixed to it. The nuts 16 lie in enlarged end sections 18 of the bores 15.
Die Kühlmitteleinspeisung in die Kühlbohrungen 11 erfolgt über die Kühlmittelkanäle 10, und zwar zweckmäßig, wie die Figur 2 zeigt, über einen Abzweig 19 zwischen einer Kühlbohrung 11 und dem benachbarten Kühlmittelkanal 10. Die Figur 3 läßt ferner erkennen, daß die Kühlmittelkanäle 10 neben den Quer¬ schnittsebenen QE der Metallbolzen 12 tiefer als die anderen Kühlmittelkanäle 10 ausgebildet sind.The coolant is fed into the cooling bores 11 via the coolant channels 10, and expediently, as shown in FIG. 2, via a branch 19 between a cooling bore 11 and the adjacent coolant channel 10. FIG. 3 also shows that the coolant channels 10, in addition to the cross-sectional planes QE of the metal bolts 12, are formed deeper than the other coolant channels 10.
Die Anordnung von Kühlmittelkanälen 10 und Kühlbohrungen 11 in einer Kupfer¬ platte 8 erfolgt dann, wenn die Kupferplatte 8 eine ausreichende Dicke D besitzt.The arrangement of coolant channels 10 and cooling bores 11 in a copper plate 8 takes place when the copper plate 8 has a sufficient thickness D.
Gelangt hingegen eine demgegenüber dünnere Kupferplatte 8a zur Anwendung , werden Kühlmittelkanäle 10a gemäß Figur 4 in die Stützplatte 9a eingearbeitet und durch die Kupferplatte 8a beim Festlegen der Kupferplatte 8a an der Stützplatte 9a mit Hilfe der Metallbolzen 12 abgedeckt. If, on the other hand, a thinner copper plate 8a is used, coolant channels 10a according to FIG. 4 are worked into the support plate 9a and covered by the copper plate 8a when the copper plate 8a is fixed to the support plate 9a with the help of the metal bolts 12.

Claims

Patentansprüche claims
1. Flüssigkeitsgekühlte Kokille zum Stranggießen von dünnen Stahlbrammen, deren Querschnittslänge ein Mehrfaches der Querschnittsbreite beträgt, wel¬ che zwei einander gegenüberliegende, jeweils eine Kupferplatte (8, 8a) und eine Stützplatte (9, 9a) aufweisende Breitseitenwände (2) und die Straπg- breite begrenzende Schmalseitenwände (3) umfaßt, wobei die den Formhohl¬ raum (4) begrenzenden Kupferplatten (8, 8a) mittels Metallbolzen (12) aus ei¬ ner CuNiFe-Legierung an den Stützplatten (9, 9a) lösbar befestigt und die Metallbolzen (12) auf die Kupferplatten (8, 8a) geschweißt sind.1. Liquid-cooled mold for the continuous casting of thin steel slabs, the cross-sectional length of which is a multiple of the cross-sectional width, which two opposite broad side walls (2), each having a copper plate (8, 8a) and a support plate (9, 9a), and the continuous comprises wide delimiting narrow side walls (3), the copper plates (8, 8a) delimiting the mold cavity (4) being detachably fastened to the support plates (9, 9a) by means of metal bolts (12) made of a CuNiFe alloy, and the metal bolts ( 12) are welded onto the copper plates (8, 8a).
2. Kokille nach Anspruch 1 , dadurch gekennzeichnet, daß die Metallbolzen (12) aus einem CuNi30Mn1 Fe-Material bestehen.2. Chill mold according to claim 1, characterized in that the metal bolts (12) consist of a CuNi30Mn1 Fe material.
3. Kokille nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Metall¬ bolzen (12) mittels Bolzenschweißverfahren an den Kupferplatten (8, 8a) be¬ festigt sind.3. Chill mold according to claim 1 or 2, characterized in that the Metall¬ bolts (12) by means of stud welding processes on the copper plates (8, 8a) are fastened.
4. Kokille nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Metallbolzen (12) unter Verwendung eines Schweißzusatzwerkstoffs (13) auf die Kupferplatten (8, 8a) geschweißt sind.4. Chill mold according to one of claims 1 to 3, characterized in that the metal bolts (12) are welded onto the copper plates (8, 8a) using a welding filler material (13).
5. Kokille nach Anspruch 4, dadurch gekennzeichnet, daß der Schweißzu¬ satzwerkstoff (13) Nickel ist. 5. Chill mold according to claim 4, characterized in that the welding additive (13) is nickel.
6. Kokille nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Kupferplatten (8) der Breitseitenwände (2) parallel zur Gießrichtung verlau¬ fende, durch die Stützplatten (9) abgedeckte nutenartige Kühlmittelkanäle (10) aufweisen.6. Chill mold according to one of claims 1 to 5, characterized in that the copper plates (8) of the broad side walls (2) parallel to the pouring direction, having through the support plates (9) covered groove-like coolant channels (10).
7. Kokille nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die7. Chill mold according to one of claims 1 to 6, characterized in that the
Kupferplatten (8) neben den Kühlmittelkanälen (10) parallel zur Gießrichtung (GR) verlaufende und in den vertikalen Querschnittsebenen (QE) der Metall¬ bolzen (12) sich erstreckende Kühlbohrungen (11 ) aufweisen.In addition to the coolant channels (10), copper plates (8) have cooling bores (11) which run parallel to the casting direction (GR) and extend in the vertical cross-sectional planes (QE) of the metal bolts (12).
8. Kokille nach Anspruch 7, dadurch gekennzeichnet, daß die Kühlbohrungen (11 ) im Badspiegelbereich angeordnet sind.8. Chill mold according to claim 7, characterized in that the cooling bores (11) are arranged in the bath level area.
9. Kokille nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Stützplatten (9a) parallel zur Gießrichtung (GR) verlaufende, durch die Kup¬ ferplatten (8a) abgedeckte nutenartige Kühlmittelkanäle (10a) aufweisen.9. Chill mold according to one of claims 1 to 5, characterized in that the support plates (9a) parallel to the casting direction (GR), by the copper plates (8a) covered groove-like coolant channels (10a).
10. Kokille nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der Querschnitt des Formhohlraums (4) am eingießseitigen Ende (5) größer ist als am strangaustrittsseitigen Ende (7).10. Chill mold according to one of claims 1 to 9, characterized in that the cross section of the mold cavity (4) at the pouring end (5) is larger than at the strand exit end (7).
11. Kokille nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß der Formhohlraum (4) eine mehrfache Konizität aufweist.11. Mold according to one of claims 1 to 10, characterized in that the mold cavity (4) has a multiple taper.
12. Kokille nach einem der Ansprüche 1 bis 11 , dadurch gekennzeichnet, daß der Formhohlraum (4) am eingießseitigen Ende (5) wenigstens eine Ausbau¬ chung (6) besitzt, die sich in Gießrichtung (GR) verkleinert. 12. Chill mold according to one of claims 1 to 11, characterized in that the mold cavity (4) at the pouring end (5) has at least one lining (6) which decreases in the casting direction (GR).
EP97924881A 1996-05-13 1997-05-07 Liquid-cooled mould Expired - Lifetime EP0912271B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19619073 1996-05-13
DE19619073 1996-05-13
DE19716450A DE19716450A1 (en) 1996-05-13 1997-04-21 Liquid-cooled mold
DE19716450 1997-04-21
PCT/DE1997/000961 WO1997043063A1 (en) 1996-05-13 1997-05-07 Liquid-cooled mould

Publications (2)

Publication Number Publication Date
EP0912271A1 true EP0912271A1 (en) 1999-05-06
EP0912271B1 EP0912271B1 (en) 2000-08-23

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EP97924881A Expired - Lifetime EP0912271B1 (en) 1996-05-13 1997-05-07 Liquid-cooled mould

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US (1) US6145579A (en)
EP (1) EP0912271B1 (en)
JP (1) JP2000510049A (en)
KR (1) KR20000010963A (en)
CN (1) CN1170645C (en)
AT (1) ATE195678T1 (en)
AU (1) AU712782B2 (en)
BR (1) BR9709585A (en)
CA (1) CA2253873A1 (en)
CZ (1) CZ335498A3 (en)
DK (1) DK0912271T3 (en)
ES (1) ES2150774T3 (en)
GR (1) GR3034806T3 (en)
PL (1) PL183716B1 (en)
PT (1) PT912271E (en)
RU (1) RU2182058C2 (en)
WO (1) WO1997043063A1 (en)

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DE19829606A1 (en) * 1998-07-02 2000-01-05 Schloemann Siemag Ag Broad side of a slab mold
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JP3443109B2 (en) * 2001-05-31 2003-09-02 ジャパン・エンジニアリング・ネットワーク株式会社 Assembly mold for continuous casting
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GR3034806T3 (en) 2001-02-28
PL329805A1 (en) 1999-04-12
CN1170645C (en) 2004-10-13
AU3023797A (en) 1997-12-05
CA2253873A1 (en) 1997-11-20
PL183716B1 (en) 2002-07-31
PT912271E (en) 2001-02-28
RU2182058C2 (en) 2002-05-10
EP0912271B1 (en) 2000-08-23
AU712782B2 (en) 1999-11-18
ES2150774T3 (en) 2000-12-01
US6145579A (en) 2000-11-14
JP2000510049A (en) 2000-08-08
BR9709585A (en) 2000-05-02
KR20000010963A (en) 2000-02-25
DK0912271T3 (en) 2000-11-06
ATE195678T1 (en) 2000-09-15
CN1219143A (en) 1999-06-09
WO1997043063A1 (en) 1997-11-20
CZ335498A3 (en) 1999-07-14

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