EP0730923B1 - Mould for continuous casting of metals - Google Patents

Mould for continuous casting of metals Download PDF

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Publication number
EP0730923B1
EP0730923B1 EP96103229A EP96103229A EP0730923B1 EP 0730923 B1 EP0730923 B1 EP 0730923B1 EP 96103229 A EP96103229 A EP 96103229A EP 96103229 A EP96103229 A EP 96103229A EP 0730923 B1 EP0730923 B1 EP 0730923B1
Authority
EP
European Patent Office
Prior art keywords
chill
casting
section
mould cavity
cross
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
Application number
EP96103229A
Other languages
German (de)
French (fr)
Other versions
EP0730923A1 (en
Inventor
Hector Villanueva
Dirk Dr. Rode
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7756002&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0730923(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by KM Europa Metal AG filed Critical KM Europa Metal AG
Publication of EP0730923A1 publication Critical patent/EP0730923A1/en
Application granted granted Critical
Publication of EP0730923B1 publication Critical patent/EP0730923B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • 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
    • B22D11/0406—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

Definitions

  • the invention relates to a mold for the continuous casting of metals, preferably steel, with a multi-conical mold cavity which is open on two opposite sides, the mold cavity cross section being larger at the end on the pouring side than at the end on the strand exit side.
  • a mold is known from US-A-4 207 941.
  • the invention has for its object to provide a mold of the type mentioned, with which on the one hand a higher casting performance and on the other hand a better strand quality can be achieved. At the same time, the heat dissipation of the partially molten strand is to be optimized in order to increase the service life of the mold.
  • the first area which has a partial length of 320 mm in the casting direction, has a taper of 2.4% / m. For the subsequent partial length of 480 mm, a taper of 1% / m was chosen.
  • the cooling-optimized region 2 with triangularly shaped recesses 3 in the cooling-side surface of the mold 1 extends to a partial length of approximately 310 mm, which begins 60 mm below the pouring side.
  • the pouring side of the mold 1 is indicated by the arrow 4.
  • the center distance of the recesses 3, which are triangular in cross section, is 8 mm in the casting direction, the individual recesses 3 having a width of 4 mm.
  • the maximum extent of the depressions 3 perpendicular to the surface is 1.2 mm.
  • the respective geometrical features of the cooling-optimized area 2 have been determined by evaluating casting tests.
  • FIG. 2 Another embodiment is shown in Figure 2.
  • the tubular mold 1, which is also provided for the continuous casting of square cross sections, has a cooling-optimized region 2 which consists of a multiplicity of circular depressions 3.
  • the overall trapezoidal area 2 extends over a partial length of 250 mm, where it tapers in the casting direction by approximately 30%.
  • Arrow 4 denotes the pouring side and arrow 5 denotes the end on the strand exit side.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Screen Printers (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

Casting mould (1) for continuous metal-, pref. steel casting, has a casting cavity open at either end, with larger cross section at the upper, inlet end than at the outlet (5) for solidified steel. In the novel design, the cavity has a re-iterated conical construction and on the cooled surface, at least locally, there is a region (2) with increased thermal transfer coefficients. Pref. the axis of the mould is straight or curved, the cross section round, polygonal or I-shaped. The conicity is three-stage, or parabolic. The cooling surface is rough, with a mechanically-applied structure, with roughness depth Rt > 1.5 microns. Structural depressions, triangular, trapezoidal or round, are offset centre-to-centre by 1-10 mm. Various shapes may be used. The structuring is in the region of maximum heat evolution. Further preferred details are included.

Description

Die Erfindung betrifft eine Kokille zum Stranggießen von Metallen, vorzugsweise Stahl, mit einem an zwei gegenüberliegenden Seiten offenen, mehrfach konisch ausgebildeten Formhohlraum, wobei der Formhohlraumquerschnitt am eingießseitigen Ende größer ist als am strangaustrittsseitigen Ende. Eine derartige Kokille ist aus US-A-4 207 941 bekannt.The invention relates to a mold for the continuous casting of metals, preferably steel, with a multi-conical mold cavity which is open on two opposite sides, the mold cavity cross section being larger at the end on the pouring side than at the end on the strand exit side. Such a mold is known from US-A-4 207 941.

In der GB-A-2 177 331 ist eine weitere Stranggießkokille erwähnt, deren kühlseitige Außenfläche im oberen Kokillenbereich parallel zueinander angeordnete, in Gießrichtung verlaufende Längsnuten zur besseren Kühlung aufweist.Another continuous casting mold is mentioned in GB-A-2 177 331, the cooling-side outer surface of which, in the upper mold region, has longitudinal grooves arranged parallel to one another and running in the casting direction for better cooling.

Der Erfindung liegt die Aufgabe zugrunde, eine Kokille der eingangs genannten Art bereitzustellen, mit der einerseits eine höhere Gießleistung und andererseits eine bessere Strangqualität erreicht werden kann. Gleichzeitig soll die Wärmeabfuhr des teilweise schmelzflüssigen Strangs optimiert werden, um die Standzeit der Kokille zu erhöhen.The invention has for its object to provide a mold of the type mentioned, with which on the one hand a higher casting performance and on the other hand a better strand quality can be achieved. At the same time, the heat dissipation of the partially molten strand is to be optimized in order to increase the service life of the mold.

Diese Aufgabe wird erfindungsgemäß durch die Kombination der in Anspruch 1 aufgeführten Merkmale gelöst.This object is achieved by the combination of the features listed in claim 1.

Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.Advantageous developments of the invention result from the subclaims.

Die Erfindung wird im folgenden anhand der in den Figuren 1 und 2 dargestellten Ausführungsbeispiele noch näher erläutert.The invention is explained in more detail below with reference to the exemplary embodiments shown in FIGS. 1 and 2.

Es zeigen:

Figur 1
in schematischer Darstellung eine Seitenansicht einer rohrförmigen Kokille und
Figur 2
eine Seitenansicht einer weiteren rohrförmigen Kokille mit einem kühloptimierten Flächenbereich.
Show it:
Figure 1
a schematic representation of a side view of a tubular mold and
Figure 2
a side view of another tubular mold with a cooling-optimized surface area.

In Figur 1 ist eine rohrförmige Kokille 1 zum Stranggießen von Stahl mit einem quadratischen Strangquerschnitt von 170 x 170 mm2 dargestellt. Die Wanddicke der gebogenen Kokille 1 (Gießradius 8 000 mm) beträgt 18 mm. Der Formhohlraum der etwa 800 mm langen Kokille 1 ist in zwei konisch verlaufende Bereiche unterteilt. Der erste Bereich, der in Gießrichtung eine Teillänge von 320 mm aufweist, besitzt eine Konizität von 2,4 %/m. Für die sich daran anschließende Teillänge von 480 mm ist eine Konizität von 1 %/m gewählt worden.1 shows a tubular mold 1 for the continuous casting of steel with a square strand cross section of 170 x 170 mm 2 . The wall thickness of the curved mold 1 (casting radius 8,000 mm) is 18 mm. The mold cavity of the approximately 800 mm long mold 1 is divided into two conical areas. The first area, which has a partial length of 320 mm in the casting direction, has a taper of 2.4% / m. For the subsequent partial length of 480 mm, a taper of 1% / m was chosen.

Wie die Figur 1 erkennen läßt, erstreckt sich der kühloptimierte Bereich 2 mit im Querschnitt dreieckförmigen Vertiefungen 3 in der kühlseitigen Oberfläche der Kokille 1 auf eine Teillänge von etwa 310 mm, die 60 mm unterhalb der Eingießseite beginnt. Mit dem Pfeil 4 ist die Eingießseite der Kokille 1 bezeichnet.As can be seen in FIG. 1, the cooling-optimized region 2 with triangularly shaped recesses 3 in the cooling-side surface of the mold 1 extends to a partial length of approximately 310 mm, which begins 60 mm below the pouring side. The pouring side of the mold 1 is indicated by the arrow 4.

Um optimale Erstarrungsbedingungen für den Stahlstrang während des Gießbetriebs zu erzielen, hat es sich als besonders vorteilhaft erwiesen, den strukturierten Bereich 2 nur auf der Bogenaußenseite der rohrförmigen Kokille 1 anzuordnen.In order to achieve optimum solidification conditions for the steel strand during the casting operation, it has proven to be particularly advantageous to arrange the structured area 2 only on the outside of the arc of the tubular mold 1.

Der Mittenabstand der im Querschnitt dreieckförmigen Vertiefungen 3 beträgt in Gießrichtung 8 mm, wobei die einzelnen Vertiefungen 3 eine Breite von 4 mm aufweisen. Die maximale Ausdehnung der Vertiefungen 3 senkrecht zur Oberfläche beträgt 1,2 mm. Die jeweiligen geometrischen Merkmale des kühloptimierten Bereichs 2 sind durch Auswertung gießtechnischer Untersuchungen ermittelt worden.The center distance of the recesses 3, which are triangular in cross section, is 8 mm in the casting direction, the individual recesses 3 having a width of 4 mm. The maximum extent of the depressions 3 perpendicular to the surface is 1.2 mm. The respective geometrical features of the cooling-optimized area 2 have been determined by evaluating casting tests.

Ein weiteres Ausführungsbeispiel ist in Figur 2 dargestellt. Die ebenfalls für das Stranggießen quadratischer Querschnitte vorgesehene rohrförmige Kokille 1 weist einen kühloptimierten Bereich 2 auf, der aus einer Vielzahl kreisrunder Vertiefungen 3 besteht. Der insgesamt trapezförmige Bereich 2 erstreckt sich dabei über eine Teillänge von 250 mm, wobei er sich in Gießrichtung um etwa 30 % verjüngt. Mit dem Pfeil 4 ist die Eingießseite und mit dem Pfeil 5 das strangaustrittsseitige Ende bezeichnet.Another embodiment is shown in Figure 2. The tubular mold 1, which is also provided for the continuous casting of square cross sections, has a cooling-optimized region 2 which consists of a multiplicity of circular depressions 3. The overall trapezoidal area 2 extends over a partial length of 250 mm, where it tapers in the casting direction by approximately 30%. Arrow 4 denotes the pouring side and arrow 5 denotes the end on the strand exit side.

In den beiden Figuren sind jeweils die Ansichten auf die gebogenen Seiten der Kokillenrohre gezeigt. Die Erfindung ist aber selbstverständlich auch auf Block- und Plattenkokillen anwendbar.The views of the curved sides of the mold tubes are shown in each of the two figures. The invention is of course also applicable to block and plate molds.

Claims (12)

  1. Chill (1) for continuous casting of metals, preferably steel, with a mould cavity which is multiply conical in shape and open at two opposing sides, the mould cavity cross-section being greater at the pouring end (4) than at the casting outlet end (5), characterised in that the cooling surface exhibits at least one surface area (2) with an increased heat transfer coefficient which consists of recesses (3) arranged partly transversely to the casting direction.
  2. Chill (1) according to claim 1, characterised in that the central axis of the chill (1) in the casting direction is straight and/or curved.
  3. Chill (1) according to one of claims 1 or 2, characterised in that the casting cross-section is round, polygonal or similar to a double T shape.
  4. Chill (1) according to one of claims 1 to 3, characterised in that the mould cavity has a three-stage or parabolic conicity.
  5. Chill (1) according to one of claims 1 to 4, characterised in that the cooling surface exhibits a roughness structure extending over part or all of the surface.
  6. Chill (1) according to one of claims 1 to 5, characterised in that the cooling surface has a mechanically applied structure with a peak to valley height Rt > 1.5 µm.
  7. Chill (1) according to one of claims 1 to 5, characterised in that the structure consists of recesses (3) with a triangular, trapezoidal or round cross-section, the distance between the centres of the recesses (3) lying in the range from 1 to 10 mm.
  8. Chill (1) according to one of claims 1 to 7, characterised in that the individual cooling surfaces exhibit a structure with a different shape and/or recess.
  9. Chill (1) according to one of claims 6 or 7, characterised in that the structure is preferably arranged in the area of the greatest heat release (bath surface area).
  10. Chill (1) according to one of claims 1 to 9, characterised in that the cooling surface exhibits a structure which extends over an area symmetrically to a casting surface longitudinal axis and tapers in the casting direction.
  11. Chill (1) according to one of claims 1 to 10, characterised in that at the pouring end (4) the mould cavity exhibits a bulge which becomes smaller in the casting direction.
  12. Chill (1) according to claim 11, characterised in that the length of the bulge is a maximum of 50% of the length of the chill.
EP96103229A 1995-03-08 1996-03-02 Mould for continuous casting of metals Revoked EP0730923B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19508169A DE19508169C5 (en) 1995-03-08 1995-03-08 Mold for continuous casting of metals
DE19508169 1995-03-08

Publications (2)

Publication Number Publication Date
EP0730923A1 EP0730923A1 (en) 1996-09-11
EP0730923B1 true EP0730923B1 (en) 2001-09-19

Family

ID=7756002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103229A Revoked EP0730923B1 (en) 1995-03-08 1996-03-02 Mould for continuous casting of metals

Country Status (18)

Country Link
US (1) US5797444A (en)
EP (1) EP0730923B1 (en)
JP (1) JPH0947844A (en)
KR (1) KR100392759B1 (en)
CN (1) CN1063366C (en)
AR (1) AR001173A1 (en)
AT (1) ATE205759T1 (en)
BR (1) BR9600967A (en)
CA (1) CA2171388C (en)
DE (2) DE19508169C5 (en)
DK (1) DK0730923T3 (en)
ES (1) ES2161929T3 (en)
IN (1) IN187265B (en)
MX (1) MX9600762A (en)
PL (1) PL179859B1 (en)
PT (1) PT730923E (en)
TW (1) TW364866B (en)
ZA (1) ZA961921B (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19802809A1 (en) * 1998-01-27 1999-07-29 Km Europa Metal Ag Liquid-cooled mold
DE10118524A1 (en) * 2001-04-14 2002-10-17 Sms Demag Ag Mold used in a continuous casting device comprises a supporting frame on which two narrow side walls and two wide side walls are arranged
EP1436106A2 (en) * 2001-10-18 2004-07-14 SMS Demag Aktiengesellschaft Method and device for optimizing the cooling capacity of a continuous casting mold for liquid metals, particularly for liquid steel
DE20219419U1 (en) * 2002-01-31 2003-04-03 KM Europa Metal AG, 49074 Osnabrück Mold pipe
TWI268821B (en) * 2002-04-27 2006-12-21 Sms Demag Ag Adjustment of heat transfer in continuous casting molds in particular in the region of the meniscus
KR20040045966A (en) * 2002-11-26 2004-06-05 주식회사 포스코 Molds for irregular heat flow direction in continuous castings
DE102004002124A1 (en) * 2004-01-14 2005-08-11 Km Europa Metal Ag continuous casting and rolling
WO2006094803A1 (en) * 2005-03-10 2006-09-14 Sms Demag Ag Method for producing a continuous casting mold and corresponding continuous casting mold
ITMI20061622A1 (en) * 2006-08-11 2008-02-12 Danieli & C Officine Meccaniche Spa CTRISTALLIZZATORE
DE102007002405A1 (en) * 2007-01-17 2008-07-24 Sms Demag Ag Continuous casting mold with coolant channel
AT508822B1 (en) * 2009-09-29 2013-11-15 Siemens Vai Metals Tech Gmbh COZIL FOR THE FORMING OF METALLIC MELT TO A METAL STRIP WITH CIRCULAR OR POLYGONAL CROSS SECTION IN A CONTINUOUS CASTING MACHINE
PL2858773T3 (en) 2012-04-19 2019-06-28 Kme Germany Gmbh & Co. Kg Mould for the continuous casting of metals
CN104395015B (en) * 2012-06-27 2016-08-17 杰富意钢铁株式会社 Casting mold and the continuous casing of steel continuously
CN103433442B (en) * 2013-08-29 2015-07-15 重庆大学 Method for determining continuous casting crystallizer inner cavity taper
CN103978168A (en) * 2014-05-19 2014-08-13 辽宁科技大学 Method of eliminating looseness and shrinkage in lower part of cast steel ingot
CN104096810A (en) * 2014-06-30 2014-10-15 武汉泛洲中越合金有限公司 Horizontal continuous casting crystallizer
BR112019007373B1 (en) * 2016-10-19 2023-04-11 Jfe Steel Corporation CONTINUOUS CASTING MOLDS AND METHOD FOR CONTINUOUS STEEL CASTING
EP3406368A1 (en) * 2017-05-23 2018-11-28 SMS Concast AG Mould for continuous casting of metallic products
DE102023115151B3 (en) 2023-04-28 2024-08-01 Cunova Gmbh Mould body

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CH440569A (en) * 1966-12-28 1967-07-31 Moossche Eisenwerke Ag Method and device for the continuous casting of billets
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Also Published As

Publication number Publication date
BR9600967A (en) 1997-12-30
KR960033606A (en) 1996-10-22
IN187265B (en) 2002-03-16
CN1137429A (en) 1996-12-11
JPH0947844A (en) 1997-02-18
KR100392759B1 (en) 2003-12-24
DE19508169C5 (en) 2009-11-12
PL313107A1 (en) 1996-09-16
DE59607700D1 (en) 2001-10-25
AR001173A1 (en) 1997-09-24
CA2171388C (en) 2002-07-16
CA2171388A1 (en) 1996-09-09
EP0730923A1 (en) 1996-09-11
MX9600762A (en) 1997-06-28
CN1063366C (en) 2001-03-21
ATE205759T1 (en) 2001-10-15
ES2161929T3 (en) 2001-12-16
DE19508169B4 (en) 2004-10-14
DK0730923T3 (en) 2001-12-31
US5797444A (en) 1998-08-25
PT730923E (en) 2002-02-28
TW364866B (en) 1999-07-21
ZA961921B (en) 1996-07-29
PL179859B1 (en) 2000-11-30
DE19508169A1 (en) 1996-09-12

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