EP1567295A1 - 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 - Google Patents

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

Info

Publication number
EP1567295A1
EP1567295A1 EP03757896A EP03757896A EP1567295A1 EP 1567295 A1 EP1567295 A1 EP 1567295A1 EP 03757896 A EP03757896 A EP 03757896A EP 03757896 A EP03757896 A EP 03757896A EP 1567295 A1 EP1567295 A1 EP 1567295A1
Authority
EP
European Patent Office
Prior art keywords
mold
casting
cross
section
continuous casting
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.)
Ceased
Application number
EP03757896A
Other languages
German (de)
French (fr)
Inventor
Adolf Gustav Zajber
Dirk Letzel
Josef Kockentiedt
Uwe Plociennik
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1567295A1 publication Critical patent/EP1567295A1/en
Ceased legal-status Critical Current

Links

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
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
    • 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 continuous casting mold for casting liquid metals, in particular liquid steel materials, at high casting speeds, to polygonal billets, blooms, pre-profile casting strands and.
  • a continuous casting mold for casting liquid metals, in particular liquid steel materials, at high casting speeds, to polygonal billets, blooms, pre-profile casting strands and.
  • the input cross-section on the pouring side has a cross-sectional enlargement compared to the output cross-section on the strand exit side and corner radii.
  • a largely identical continuous casting mold is known from EP 0 498 296 B2. This is based on the task of achieving cooling of the strand crust, which can be measured over the entire circumference, within the tubular mold by deforming the strand cross section, in order to improve the strand quality on the one hand and to increase the casting speed on the other hand. Differences in the casting speed during operation without strand damage should also be permitted.
  • the known invention intends to solve this problem by enlarging the cross-section in the form of bulges which continuously decrease in size. At least three such bulges should be present in the round strands over the circumference.
  • Such a design is not limited to round strands, but cannot easily determine the cooling conditions of the casting strand, in particular the surface quality, the structure close to the edge and the throughput of a billet mold.
  • the object of the invention is to provide such a tubular mold made of copper with regard to all technological requirements that arise for the cooling processes at casting speeds of approx. 10 m / min to adjust.
  • the object is achieved according to the invention in that the inner geometric cross-sectional shape and the associated dimensions are designed analogously to the locally dissipative amount of the heat of solidification at a selected casting speed and analogously to the expansion of the tubular mold.
  • the tube mold is adapted in a process-optimized manner in that the heat of solidification is related to the mold height (length) in accordance with the (high) casting speed, both by the strand shrinkage behavior and by the mold expansion during the casting operation.
  • the strand shell is advantageously always without an air gap on the inner surface (hot side) of the mold. For example, the excessive amount of heat in the area of the mold level for the shrinking of the strand and the mold expansion are taken into account.
  • the tubular mold in its inner shape and dimensions are constructed from these values. The values can be used, for example, with mold heights of approx. 1000 - 1100 mm.
  • the outer shape and dimensions of the mold tube can be designed by designing the outer shape analogously to the mold thermal expansion, at least in individual height regions of the tubular mold.
  • the casting material itself is taken into account in that the tubular mold is shaped in its geometric cross-sectional shapes in relation to the respective steel grade. A pronounced shrinkage is detected, for example, in that the tubular mold has a section of greater conicity in the region of the casting level corresponding to the larger shrinkage of the casting strand.
  • the conicity of the tubular mold and its wall thickness result from the fact that below the section of greater conicity of the tubular mold, the wall volume is made variable in accordance with the amount of heat dissipated per unit of time.
  • the thermal expansion of the tubular mold can also be checked on its outer surface by increasing the outer surface of the tubular mold through incisions, ribs or the like in areas of reduced wall volume.
  • the behavior of the casting strand during shrinkage is additionally favorably influenced by the fact that starting at the entrance cross-section, a central, approximately parabolic-shaped recess is provided for each cross-sectional side.
  • the approximately parabolic recess decreases in the direction of the strand exit side.
  • An individual adjustment can be made to the respective broad and / or narrow side of the input cross section.
  • the length of the approximately parabolic recess extends approximately to half the mold height.
  • the shrinkage behavior of the casting strand can also be taken into account in that the length of the approximately parabolic recess is adapted to the shrinkage dimension at the level of the respective broad and / or narrow side of the mold cross section.
  • a plane-parallel surface is formed in the area of a corner radius, which is opposite to analog counter-surfaces in the inner cross-sectional shape.
  • FIG. 1 shows a cross section through a tubular mold with an attached diagram of the heat of solidification over the mold height
  • FIG. 2 shows the same cross section as FIG. 1, the
  • Fig. 3 shows the same cross section as Fig. 1, the
  • FIG. 3A is assigned as “section A-A” and FIG. 3B as “section B-B",
  • the continuous casting mold is shown in cross section and is used for casting liquid metals, in particular liquid steel material polygonal billet, billet, pre-profile casting strands 1 u.
  • the continuous casting mold consists of a tubular mold 2 made of copper or copper alloys.
  • the inlet cross section 3 on the pouring side 4 represents an enlarged cross section 5 compared to the outlet cross section 6 on the strand outlet side 7.
  • the pouring side 4 and the strand outlet side are continuous with a radius 8 (FIGS. 4A and 4B) provided in the transition.
  • a diagram “D” of the course of the removal of the heat of solidification from the casting strand 1 is drawn on the right-hand side above the mold height 11. This results in the strongly increasing temperature curve in the area of the casting surface.
  • the tubular mold 2 is now constructed in such a way that the inner geometric cross-sectional shape 9 and the associated dimensions 10 are analogous to the locally dissipative amount of the heat of solidification (cf. FIG. 1, right diagram “D”) at a selected (high) casting speed and analogously to the expansion the tube mold 2 is fixed, ie executed based on calculations and / or empirical values.
  • the outer shape 12 is reduced at least in individual height regions 12 of the tubular mold 2 analogously to the mold thermal expansion.
  • the values for the expansion or shrinkage of the cast metal can also be included in the geometric cross-sectional shape 9 depending on the presence of a certain steel grade.
  • the tubular mold 2 has a section 14 of great conicity in the area of the casting level 13 (FIG. 2) and immediately thereafter a section 15 of even greater conicity corresponding to the greatest shrinkage of the casting strand 1.
  • the wall volume 17 is Changed depending on the amount of heat dissipated per unit of time executed or reduced.
  • the outer surface 18 of the tubular mold 2 is enlarged by incisions, ribs 19 or the like (FIGS. 4A and 4B).
  • These incisions 19 are washed around by the cooling medium (water) on the outside and are in a conventional water box (not shown) surrounding the continuous casting mold.
  • the incisions, ribs 19 or the like increase the cooling surface.
  • the cuts, ribs 19 or the like are also visible in FIGS. 3 and 3B.
  • a central, approximately parabolic-shaped recess 20 is made for each cross-sectional side 3a, starting at the input cross-section 3.
  • the parabolic recess 20 decreases in depth and thus in its width downward in the direction of the strand exit side 7.
  • the length 20a of the parabolic recess 20 extends approximately to half the mold height 11.
  • the length 20a of the parabolic recess 20 is also adapted to the shrinkage of the height of the respective broad and / or narrow side 21 of the mold cross section 22 (FIG. 4A).
  • a plane-parallel surface 23 is formed to run downwards, which are opposite each other to analog counter surfaces 24 in the inner cross-sectional shape 9.

Abstract

The invention relates to a continuous casting mold for casting molten metals, particularly steel materials, at high casting rates to form polygonal billet, bloom, and preliminary section castings (1) and the like. Said mold is comprised of a tubular mold (2) made of copper or of copper alloys whose entry cross-section (3) on the pouring-in side (4) has both a cross-section (5), which is enlarged compared to the exit cross-section (6) on the casting exit side (7), and corner radii (8). The continuous casting mold can be improved in a technologically process-oriented manner with regard to requirements concerning the cooling processes. To this end, the inner geometric cross-sectional shape (9) and the associated dimensions (10) are provided so that they are analogous to the amount of solidification heat, which is capable of being locally dissipated, at a chosen casting rate and are analogous to the extension of the tubular mold (2).

Description

STRANGGIESSKOKILLE ZUM GIESSEN VON FLUESSIGEN METALLEN, INSBESONDERE VON STAHL E RKSTOFFEN, BEI HOHEN GIESSGESCHWINDIGKEITEN ZU POLYGONALEN KNUEPPEL- VORBLOCK- VORPROFIL-GIESSSTRAENGEN S TR A N GG IE SS K OK ILLE FOR THE CASTING OF LIQUID METALS, IN PARTICULAR SO ND E RE V O N ST A H LE R K SUBSTANCES , B E I H O H HIGH CASTING SPEEDS TO POLYGONAL KN U EP P EL- BEFORE BL O CK PRE-PROFILE CASTING STRINGS
Die Erfindung betrifft eine Stranggießkokille zum Gießen von flüssigen Metallen, insbesondere von flüssigen Stahlwerkstoffen, bei hohen Gießgeschwindigkeiten, zu polygonalen Knüppel-, Vorblock-, Vorprofil-Gießsträngen u. dgl., bestehend aus einer Rohrkokille aus Kupfer, deren Eingangs-Querschnitt auf der Eingießseite eine Querschnitts-Vergrößerung gegenüber dem Ausgangs- Querschnitt auf der Strang-Austrittsseite und Ecken-Radien aufweist.The invention relates to a continuous casting mold for casting liquid metals, in particular liquid steel materials, at high casting speeds, to polygonal billets, blooms, pre-profile casting strands and. Like., consisting of a tubular mold made of copper, the input cross-section on the pouring side has a cross-sectional enlargement compared to the output cross-section on the strand exit side and corner radii.
Eine weitgehend gleiche Stranggießkokille ist aus der EP 0 498 296 B2 bekannt. Dieser liegt die Aufgabe zugrunde, innerhalb der Rohrkokille durch Ver- formung des Strangquerschnitts eine über den ganzen Umfang bemessbare Kühlung der Strangkruste zu erreichen, um einerseits die Strangqualität zu verbessern und anderseits die Gießgeschwindigkeit zu erhöhen. Es sollen auch Unterschiede der Gießgeschwindigkeit während des Betriebes ohne Strangschäden zugelassen werden. Diese Aufgabe will die bekannte Erfindung durch Querschnitts-Vergrößerungen in der Form von Ausbauchungen lösen, die sich fortlaufend verkleinern. Über den Umfang sollen mindestens drei solcher Ausbauchungen bei Rundsträngen vorhanden sein.A largely identical continuous casting mold is known from EP 0 498 296 B2. This is based on the task of achieving cooling of the strand crust, which can be measured over the entire circumference, within the tubular mold by deforming the strand cross section, in order to improve the strand quality on the one hand and to increase the casting speed on the other hand. Differences in the casting speed during operation without strand damage should also be permitted. The known invention intends to solve this problem by enlarging the cross-section in the form of bulges which continuously decrease in size. At least three such bulges should be present in the round strands over the circumference.
Eine solche Gestaltung ist zwar nicht auf Rundstränge begrenzt, kann jedoch nicht ohne weiteres die Abkühlungsverhältnisse des Gießstrangs, insbesondere die Oberflächen-Qualität, die randnahe Gefügestruktur und den Durchsatz einer Knüppelkokille, bestimmen.Such a design is not limited to round strands, but cannot easily determine the cooling conditions of the casting strand, in particular the surface quality, the structure close to the edge and the throughput of a billet mold.
Das Leistungsvermögen solcher Knüppelkokillen geht dahin, bei hohen Gieß- geschwindigkeiten auch hohe Oberflächenqualitäten zu erzielen. Die Schwierigkeiten dabei liegen in der Komplexität des Abkühlungsvorgangs und in dem Verhalten des Gießstrangs einerseits und der Rohrkokille andererseits.The capacity of such billet molds is to achieve high surface qualities at high casting speeds. The difficulties here lie in the complexity of the cooling process and in the behavior of the casting strand on the one hand and the tubular mold on the other.
Der Erfindung liegt die Aufgabe zugrunde, eine solche Rohrkokille aus Kupfer bezüglich aller auftretender technologischer Anforderungen an die Abkühlungsvorgänge bei Gießgeschwindigkeiten von ca. 3 -. 10 m / min anzupassen.The object of the invention is to provide such a tubular mold made of copper with regard to all technological requirements that arise for the cooling processes at casting speeds of approx. 10 m / min to adjust.
Die gestellte Aufgabe wird erfindungsgemäß dadurch gelöst, dass die innere geometrische Querschnittsform und die zugehörigen Abmessungen analog zur örtlich ableitungsfähigen Menge der Erstarrungswärme bei einer gewählten Gießgeschwindigkeit und analog zur Ausdehnung der Rohrkokille ausgeführt sind. Dadurch wird die Rohrkokille prozessoptimiert angepasst, indem die Erstarrungswärme entsprechend der (hohen) Gießgeschwindigkeit auf die Kokillenhöhe ( - Länge) bezogen, sowohl durch das Strang-Schrumpfverhalten als auch durch die Kokillenausdehnung während des Gießbetriebs abgeführt wird. Die Strangschale liegt vorteilhafterweise immer ohne Luftspalt an der Innenfläche ( Heißseite) der Kokille an. So kann z.B. die überhöhte Wärmemenge im Gießspiegelbereich für das Strangschrumpfen und die Kokillenausdehnung mit einkalkuliert werden. Aus diesen Werten wird die Rohrkokille in ihrer inneren Form und die Abmessungen konstruiert. Die Werte sind bspw. bei Kokillenhöhen von ca. 1000 - 1100 mm anwendbar.The object is achieved according to the invention in that the inner geometric cross-sectional shape and the associated dimensions are designed analogously to the locally dissipative amount of the heat of solidification at a selected casting speed and analogously to the expansion of the tubular mold. As a result, the tube mold is adapted in a process-optimized manner in that the heat of solidification is related to the mold height (length) in accordance with the (high) casting speed, both by the strand shrinkage behavior and by the mold expansion during the casting operation. The strand shell is advantageously always without an air gap on the inner surface (hot side) of the mold. For example, the excessive amount of heat in the area of the mold level for the shrinking of the strand and the mold expansion are taken into account. The tubular mold in its inner shape and dimensions are constructed from these values. The values can be used, for example, with mold heights of approx. 1000 - 1100 mm.
Ebenso kann das Kokillenrohr in seiner Außenform und den Abmessungen gestaltet werden, indem die Außenform zumindest in einzelnen Höhenbereichen der Rohrkokille analog der Kokillen-Wärmeausdehnung gestaltet ist.Likewise, the outer shape and dimensions of the mold tube can be designed by designing the outer shape analogously to the mold thermal expansion, at least in individual height regions of the tubular mold.
Nach weiteren Merkmalen wird der Gießwerkstoff selbst dadurch berücksichtigt, dass die Rohrkokille in ihren geometrischen Querschnittsformen bezogen auf die jeweilige Stahlgüte geformt ist. Eine stark ausgeprägte Schrumpfung wird z.B. dadurch erfasst, dass die Rohrkokille im Bereich des Gießspiegels einen Abschnitt größerer Konizität entsprechend der größeren Schrumpfung des Gießstrangs aufweist.According to further features, the casting material itself is taken into account in that the tubular mold is shaped in its geometric cross-sectional shapes in relation to the respective steel grade. A pronounced shrinkage is detected, for example, in that the tubular mold has a section of greater conicity in the region of the casting level corresponding to the larger shrinkage of the casting strand.
Auf einen solchen Schrumpf-Abschnitt wird eine Konizität entsprechend dem Strangschalenwachstum und der üblichen Schrumpfung ( auf der Basis Schalenwachstum S = Kennzahl k • t; mit t = Gießzeit) angewendet, indem unterhalb dem Abschnitt größerer Konizität die Rohrkokille mit einer sich stetig verändernden Konizität entsprechend dem Strangschalen-Wachstum und der Schrumpfung des Gießstrangs ausgeführt ist.A conicity corresponding to the strand shell growth and the usual shrinkage (on the basis of shell growth S = characteristic number k • t; with t = casting time) is applied to such a shrinkage section, in that the tube mold with a constantly changing conicity correspondingly below the section with greater conicity the strand shell growth and the shrinkage of the casting strand is carried out.
Die Konizität der Rohrkokille und ihre Wanddicke ergeben sich nach weiteren Merkmalen dadurch, dass unterhalb dem Abschnitt größerer Konizität der Rohrkokille das Wandvolumen entsprechend der pro Zeiteinheit abgeführten Wärmemenge veränderlich ausgeführt ist.According to further features, the conicity of the tubular mold and its wall thickness result from the fact that below the section of greater conicity of the tubular mold, the wall volume is made variable in accordance with the amount of heat dissipated per unit of time.
Die Wärmedehnung der Rohrkokille kann außerdem auf ihrer Außenfläche kontrolliert werden, indem in Bereichen verminderten Wandvolumens die Außenfläche der Rohrkokille durch Einschnitte, Rippen o. dgl. vergrößert ist.The thermal expansion of the tubular mold can also be checked on its outer surface by increasing the outer surface of the tubular mold through incisions, ribs or the like in areas of reduced wall volume.
Das Verhalten des Gießstrangs beim Schrumpfen wird nach anderen vorteilhaften Merkmalen zusätzlich dadurch günstig beeinflusst, dass am Eingangs- Querschnitt beginnend, pro Querschnittsseite eine mittige, etwa parabelförmige Ausnehmung vorgesehen ist.According to other advantageous features, the behavior of the casting strand during shrinkage is additionally favorably influenced by the fact that starting at the entrance cross-section, a central, approximately parabolic-shaped recess is provided for each cross-sectional side.
Mit Rücksicht auf die je nach Strangschalendicke abnehmenden Schrumpfung ist ferner vorgesehen, dass die etwa parabelförmige Ausnehmung sich in Richtung auf die Strang-Austrittsseite hin vermindert. Dabei kann eine individuelle Anpassung an der jeweiligen Breit- und / oder Schmalseite des Eingangsquerschnitts vorgenommen werden. Anhand von beispielhaften Berechnungen ist weiter vorteilhaft, dass sich die Länge der etwa parabelförmigen Ausnehmung ungefähr bis in die halbe Kokillenhöhe erstreckt.In view of the decreasing shrinkage depending on the strand shell thickness, it is also provided that the approximately parabolic recess decreases in the direction of the strand exit side. An individual adjustment can be made to the respective broad and / or narrow side of the input cross section. On the basis of exemplary calculations, it is also advantageous that the length of the approximately parabolic recess extends approximately to half the mold height.
Das Schrumpfverhalten des Gießstrangs kann ferner dadurch berücksichtigt werden, dass die Länge der etwa parabelförmigen Ausnehmung dem Schrumpfmaß auf Höhe der jeweiligen Breit- und / oder Schmalseite des Kokillen-Querschnitts angepasst ist.The shrinkage behavior of the casting strand can also be taken into account in that the length of the approximately parabolic recess is adapted to the shrinkage dimension at the level of the respective broad and / or narrow side of the mold cross section.
Ferner wird eine Weiterentwicklung dadurch erzielt, dass im Bereich eines Ek- ken-Radius jeweils eine planparallele Fläche gebildet ist, die zu analogen Gegenflächen in der inneren Querschnittsform gegenüberliegen.Furthermore, further development is achieved in that a plane-parallel surface is formed in the area of a corner radius, which is opposite to analog counter-surfaces in the inner cross-sectional shape.
In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt, die nachfolgend näher erläutert werden.In the drawing, embodiments of the invention are shown, which are explained in more detail below.
Es zeigen:Show it:
Fig. 1 einen Querschnitt durch eine Rohrkokille mit einem angefügten Diagramm der Erstarrungswärme über die Kokillenhöhe, Fig. 2 denselben Querschnitt wie Fig. 1 , der1 shows a cross section through a tubular mold with an attached diagram of the heat of solidification over the mold height, FIG. 2 shows the same cross section as FIG. 1, the
Fig. 2A als „Schnitt A-A" und der2A as "section A-A" and the
Fig. 2B als Schnitt „B-B" zugeordnet ist,2B is assigned as section "B-B",
Fig. 3 denselben Querschnitt wie Fig. 1 , der derFig. 3 shows the same cross section as Fig. 1, the
Fig. 3A als „Schnitt A-A" und der Fig. 3B als „Schnitt B-B" zugeordnet ist,3A is assigned as "section A-A" and FIG. 3B as "section B-B",
Fig. 4 einen Querschnitt mit der etwa parabelförmigen Ausnehmung,4 shows a cross section with the approximately parabolic recess,
Fig. 4A einen „Schnitt A-A" und4A is a "section A-A" and
Fig. 4B einen „Schnitt B-B" .4B shows a "section B-B".
Gemäß Fig. 1 ist die Stranggießkokille im Querschnitt dargestellt und dient zum Gießen von flüssigen Metallen, insbesondere von flüssigem Stahlwerkstoff zu polygonalen Knüppel-, Vorblock-, Vorprofil-Gießsträngen 1 u. dgl.. Die Stranggießkokille besteht aus einer Rohrkokille 2 aus Kupfer oder Kupferlegierungen. Der Eingangs-Querschnitt 3 stellt auf der Eingießseite 4 eine Querschnitts- Vergrößerung 5 gegenüber dem Ausgangs-Querschnitt 6 auf der Strang- Austrittseite 7 dar. Die Eingießseite 4 und die Strang-Austrittsseite sind durch- laufend mit einem Radius 8 ( Fig. 4A und 4B ) im Übergang versehen. Über die Kokillenhöhe 11 ist ein Diagramm „D" des Verlaufs beim Entziehen der Erstarrungswärme aus dem Gießstrang 1 auf der rechten Seite gezeichnet. Daraus ergibt sich der stark ansteigende Temperaturverlauf im Gießspiegelbereich.1, the continuous casting mold is shown in cross section and is used for casting liquid metals, in particular liquid steel material polygonal billet, billet, pre-profile casting strands 1 u. The like. The continuous casting mold consists of a tubular mold 2 made of copper or copper alloys. The inlet cross section 3 on the pouring side 4 represents an enlarged cross section 5 compared to the outlet cross section 6 on the strand outlet side 7. The pouring side 4 and the strand outlet side are continuous with a radius 8 (FIGS. 4A and 4B) provided in the transition. A diagram “D” of the course of the removal of the heat of solidification from the casting strand 1 is drawn on the right-hand side above the mold height 11. This results in the strongly increasing temperature curve in the area of the casting surface.
Die Rohrkokille 2 ist nunmehr derart konstruiert, dass die innere geometrische Querschnittsform 9 und die zugehörenden Abmessungen 10 analog zur örtlich ableitungsfähigen Menge der Erstarrungswärme ( vgl. Fig. 1 , rechtes Diagramm „D" ) bei einer gewählten (hohen ) Gießgeschwindigkeit und analog zur Ausdehnung der Rohrkokille 2 festgelegt, d.h. aufgrund von Berechnungen und / oder Erfahrungswerten ausgeführt sind.The tubular mold 2 is now constructed in such a way that the inner geometric cross-sectional shape 9 and the associated dimensions 10 are analogous to the locally dissipative amount of the heat of solidification (cf. FIG. 1, right diagram “D”) at a selected (high) casting speed and analogously to the expansion the tube mold 2 is fixed, ie executed based on calculations and / or empirical values.
Dabei wird die Außenform 12 zumindest in einzelnen Höhenbereichen 12 der Rohrkokille 2 analog zur Kokillen-Wärmeausdehnung vermindert.The outer shape 12 is reduced at least in individual height regions 12 of the tubular mold 2 analogously to the mold thermal expansion.
Die Werte für die Ausdehnung oder das Schrumpfen des Gießmetalls können ebenfalls in die geometrische Querschnittsform 9 je nach Vorliegen einer bestimmten Stahlgüte miteinbezogen werden.The values for the expansion or shrinkage of the cast metal can also be included in the geometric cross-sectional shape 9 depending on the presence of a certain steel grade.
Gemäß Fig. 1 bis 4 weist die Rohrkokille 2 im Bereich des Gießspiegels 13 (Fig. 2) einen Abschnitt 14 großer Konizität und unmittelbar anschließend einen Abschnitt 15 noch größerer Konizität entsprechend der größten Schrumpfung des Gießstrangs 1 auf.According to FIGS. 1 to 4, the tubular mold 2 has a section 14 of great conicity in the area of the casting level 13 (FIG. 2) and immediately thereafter a section 15 of even greater conicity corresponding to the greatest shrinkage of the casting strand 1.
Unterhalb dem Abschnitt 15 größerer Konizität setzt sich eine sich stetig ver- ändernde Konizität 16 entsprechend dem Strangschalen-Wachstum und derBelow the section 15 of greater conicity, there is a constantly changing conicity 16 in accordance with the strand shell growth and the
Schrumpfung des Gießstrangs 1 fort. Dabei ist das Wandvolumen 17 entspre- chend der pro Zeiteinheit abgeführten Wärmemenge veränderlich bzw. vermindert ausgeführt. In den Bereichen verminderten Wandvolumens 17 ist die Außenfläche 18 der Rohrkokille 2 durch Einschnitte, Rippen 19 o. dgl. vergrößert ( Fig. 4A und 4B ) . Diese Einschnitte 19 sind vom Kühlmedium (Wasser) außen umspült und liegen in einem üblichen, die Stranggießkokille umgebenden Was- serkasten (nicht gezeichnet). Die Einschnitte, Rippen 19 o. dgl. vergrößern die Kühloberfläche. Die Einschnitte, Rippen 19 o. dgl. sind ebenfalls in den Fig. 3 und 3B sichtbar.Shrinkage of the casting strand 1 continues. The wall volume 17 is Changed depending on the amount of heat dissipated per unit of time executed or reduced. In the areas of reduced wall volume 17, the outer surface 18 of the tubular mold 2 is enlarged by incisions, ribs 19 or the like (FIGS. 4A and 4B). These incisions 19 are washed around by the cooling medium (water) on the outside and are in a conventional water box (not shown) surrounding the continuous casting mold. The incisions, ribs 19 or the like increase the cooling surface. The cuts, ribs 19 or the like are also visible in FIGS. 3 and 3B.
In den Fig. 4 und 4A ist jeweils am Eingangs-Querschnitt 3 beginnend, pro Querschnittsseite 3a eine mittige, etwa parabelförmige Ausnehmung 20 angebracht. Die parabelförmige Ausnehmung 20 vermindert sich in der Tiefe und damit in ihrer Breite nach unten in Richtung auf die Strang-Austrittsseite 7 hin. Dabei erstreckt sich die Länge 20a der parabelförmigen Ausnehmung 20 ungefähr bis in die halbe Kokillenhöhe 11. Die Länge 20a der parabelförmigen Ausnehmung 20 ist ebenfalls auf das Schrumpfmaß der Höhe der jeweiligen Breit- und / oder Schmalseite 21 des Kokillen-Querschnitts 22 angepasst ( Fig. 4A).4 and 4A, a central, approximately parabolic-shaped recess 20 is made for each cross-sectional side 3a, starting at the input cross-section 3. The parabolic recess 20 decreases in depth and thus in its width downward in the direction of the strand exit side 7. The length 20a of the parabolic recess 20 extends approximately to half the mold height 11. The length 20a of the parabolic recess 20 is also adapted to the shrinkage of the height of the respective broad and / or narrow side 21 of the mold cross section 22 (FIG. 4A).
Im Bereich eines Ecken-Radius 8 ist jeweils eine planparallele Fläche 23 nach unten verlaufend ausgebildet, die zu analogen Gegenflächen 24 in der inneren Querschnittsform 9 jeweils einander gegenüber liegen. In the area of a corner radius 8, a plane-parallel surface 23 is formed to run downwards, which are opposite each other to analog counter surfaces 24 in the inner cross-sectional shape 9.
Bezugszeichenliste 40 456Reference symbol list 40 456
1 Knüppel-, Vorblock- oder Vorprofil-Gießstrang1 billet, bloom or bloom casting
2 Rohrkokille (aus Kupfer) 3 Eingangs-Querschnitt2 tubular mold (made of copper) 3 entrance cross-section
3a Querschnittsseite Eingießseite3a cross-sectional side pouring side
5 Querschnitts-Vergrößerung Ausgangs-Querschnitt Strang-Austrittsseite Ecken-Radius geometrische Querschnittsform5 Cross-sectional enlargement Output cross-section strand exit side Corner radius Geometric cross-sectional shape
10 Abmessung10 dimensions
11 Kokillenhöhe 12 Außenform11 mold height 12 outer shape
13 Gießspiegel13 casting mirror
14 Abschnitt großer Konizität14 section of great conicity
15 Abschnitt größerer Konizität15 section of greater conicity
16 veränderte Konizität 17 Wandvolumen des Kokillenrohrs 8 Außenfläche des Kokillenrohrs 9 Einschnitte, Rippen 0 parabelförmige Ausnehmung 0a Länge der Ausnehmung 1 Breit- bzw. Schmalseite 2 Kokillen-Querschnitt 3 planparallele Fläche 4 gleiche Gegenfläche 16 changed conicity 17 wall volume of the mold tube 8 outer surface of the mold tube 9 incisions, ribs 0 parabolic recess 0a length of the recess 1 wide or narrow side 2 mold cross section 3 plane-parallel surface 4 same counter surface

Claims

Patentansprüche claims
1 . Stranggießkokille zum Gießen von flüssigen Metallen, insbesondere von flüssigen Stahlwerkstoffen, bei hohen Gießgeschwindigkeiten, zu polygonalen Knüppel-, Vorblock-, Vorprofil-Gießsträngen (1 ) u. dgl., bestehend aus einer Rohrkokille (2) aus Kupfer oder Kupferlegierungen, deren Eingangs- Quer-schnitt (3) auf der Eingießseite (4) eine Querschnitts-Vergrößerung (5) gegenüber dem Ausgangs-Querschnitt (6) auf der Strang-Austrittsseite (7) und Ecken-Radien (8) aufweist, dadurch gekennzeichnet, dass die innere geometrische Querschnittsform (9) und die zugehörigen Abmessungen (10) analog zur örtlich ableitungsfähigen Menge der Erstar- rungswärme bei einer gewählten Gießgeschwindigkeit und analog zur Ausdehnung der Rohrkokille (2) ausgeführt sind.1 . Continuous casting mold for casting liquid metals, in particular liquid steel materials, at high casting speeds, to polygonal billet, bloom, pre-profile casting strands (1) and. Like., consisting of a tubular mold (2) made of copper or copper alloys, the input cross-section (3) on the pouring side (4) a cross-sectional enlargement (5) compared to the output cross-section (6) on the strand exit side (7) and corner radii (8), characterized in that the inner geometric cross-sectional shape (9) and the associated dimensions (10) analogous to the locally dissipative amount of solidification heat at a selected casting speed and analogous to the expansion of the tube mold ( 2) are executed.
2. Stranggießkokille nach Anspruch 1 , dadurch gekennzeichnet, dass die Außenform (12) zumindest in einzelnen Höhenbereichen der Rohrkokille (2) analog der Kokillen-Wärmeausdehnung gestaltet ist.2. Continuous casting mold according to claim 1, characterized in that the outer shape (12) is designed at least in individual height regions of the tubular mold (2) analogous to the mold thermal expansion.
3. Stranggießkokille nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Rohrkokille (2) in ihren geometrischen Querschnittsformen (9) bezogen auf die jeweilige Stahlgüte geformt ist.3. Continuous casting mold according to one of claims 1 or 2, characterized in that the tubular mold (2) is shaped in its geometric cross-sectional shapes (9) based on the respective steel grade.
4. Stranggießkokille nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Rohrkokille (2) im Bereich des Gießspiegels (13) einen Abschnitt4. Continuous casting mold according to one of claims 1 to 3, characterized in that the tubular mold (2) has a section in the area of the casting mirror (13)
(15) größerer Konizität entsprechend der größeren Schrumpfung des Gießstrangs (1 ) aufweist.(15) has greater conicity corresponding to the greater shrinkage of the casting strand (1).
5. Stranggießkokille nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass unterhalb dem Abschnitt (15) größerer Konizität die Rohrkokille (2) mit einer sich stetig verändernden Konizität (16) entsprechend dem Strangschalen-Wachstum und der Schrumpfung des Gießstrangs (1) ausgeführt ist.5. Continuous casting mold according to one of claims 1 to 4, characterized in that below the section (15) of greater conicity, the tubular mold (2) with a constantly changing conicity (16) corresponding to the strand shell growth and the shrinkage of the casting strand (1) is executed.
6. Stranggießkokille nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass unterhalb dem Abschnitt (15) größerer Konizität der Rohrkokille (2) das Wandvolumen (17) entsprechend der pro Zeiteinheit abgeführten Wärme- menge veränderlich ausgeführt ist.6. Continuous casting mold according to one of claims 1 to 5, characterized in that below the section (15) of greater conicity of the tubular mold (2), the wall volume (17) is made variable in accordance with the amount of heat dissipated per unit of time.
7. Stranggießkokille nach Anspruch 6, dadurch gekennzeichnet, dass in Bereichen verminderten Wandvolumens (17) die Außenfläche (18) der Rohrkokille (2) durch Einschnitte, Rippen (19) o. dgl. vergrößert ist.7. Continuous casting mold according to claim 6, characterized in that in areas of reduced wall volume (17) the outer surface (18) of the tubular mold (2) is enlarged by incisions, ribs (19) or the like.
8. Stranggießkokille nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass am Eingangs-Querschnitt (3) beginnend, pro Querschnittsseite (3a) ei- ne mittige, etwa parabelförmige Ausnehmung (20) vorgesehen ist.8. Continuous casting mold according to one of claims 1 to 7, characterized in that starting at the input cross-section (3), a central, approximately parabolic-shaped recess (20) is provided for each cross-sectional side (3a).
9. Stranggießkokille nach Anspruch 8, dadurch gekennzeichnet, dass die etwa parabelförmige Ausnehmung (20) sich in Richtung auf die Strang-Austrittsseite (7) hin vermindert. 9. Continuous casting mold according to claim 8, characterized in that the approximately parabolic recess (20) decreases in the direction of the strand exit side (7).
10. Stranggießkokille nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, dass sich die Länge (20a) der etwa parabelförmigen Ausnehmung (20) ungefähr bis in die halbe Kokillenhöhe (11 ) erstreckt.10. Continuous casting mold according to one of claims 8 or 9, characterized in that the length (20a) of the approximately parabolic recess (20) extends approximately to half the mold height (11).
1 1. Stranggießkokille nach einem der 8 bis 10, dadurch gekennzeichnet, dass die Länge (20a) der etwa parabelförmigen Ausnehmung (20) dem Schrumpfmaß auf Höhe der jeweiligen Breit- und / oder Schmalseite (21 ) des Kokillen-Querschnitts (22) angepasst ist.1 1. Continuous casting mold according to one of 8 to 10, characterized in that the length (20a) of the approximately parabolic recess (20) is adapted to the shrinkage dimension at the level of the respective broad and / or narrow side (21) of the mold cross section (22) is.
12. Stranggießkokille nach einem der Ansprüche 8 bis 1 1 , dadurch gekennzeichnet, dass im Bereich eines Ecken-Radius (8) jeweils eine nach unten anschließende planparallele Fläche (23) gebildet ist, die zu analogen Gegenfläche (24) in der inneren Querschnittsform (9) gegenüberliegt. 12. Continuous casting mold according to one of claims 8 to 1 1, characterized in that in the region of a corner radius (8) in each case a downward plane-parallel surface (23) is formed, which is analogous to the counter surface (24) in the inner cross-sectional shape ( 9) is opposite.
EP03757896A 2002-11-13 2003-10-01 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 Ceased EP1567295A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10252723 2002-11-13
DE10252723 2002-11-13
PCT/EP2003/010861 WO2004043628A1 (en) 2002-11-13 2003-10-01 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

Publications (1)

Publication Number Publication Date
EP1567295A1 true EP1567295A1 (en) 2005-08-31

Family

ID=32239996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03757896A Ceased EP1567295A1 (en) 2002-11-13 2003-10-01 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

Country Status (11)

Country Link
EP (1) EP1567295A1 (en)
KR (1) KR101060114B1 (en)
CN (1) CN1325196C (en)
AU (1) AU2003273929A1 (en)
BR (1) BR0316249B1 (en)
CA (1) CA2506078C (en)
DE (1) DE10351348A1 (en)
PL (1) PL375369A1 (en)
RU (1) RU2320453C2 (en)
UA (1) UA79025C2 (en)
WO (1) WO2004043628A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2515862A1 (en) 2003-02-14 2004-09-02 Depuy Spine, Inc. In-situ formed intervertebral fusion device
DE102005039994A1 (en) * 2005-08-24 2007-03-08 Sms Demag Ag Mold for a continuous casting plant
EP2292350A1 (en) * 2009-08-04 2011-03-09 Siemens VAI Metals Technologies S.r.l. Mould for continous casting of long or flat products, cooling jacket designed to cooperate with such a mould and assembly comprising such a mould and such cooling jacket
ITUD20110211A1 (en) * 2011-12-23 2013-06-24 Danieli Off Mecc CRYSTALLIZER FOR CONTINUOUS CASTING
CN113333691B (en) * 2021-05-25 2023-01-31 上海交通大学 Casting mold for large-height-diameter ratio high-temperature alloy ingot casting and application
KR20230083055A (en) 2021-12-02 2023-06-09 주식회사 포스코 Method of mold and mold

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1554717A (en) * 1975-06-16 1979-10-24 Shrum L R Moulds for the continuous casting of steel
US4207941A (en) * 1975-06-16 1980-06-17 Shrum Lorne R Method of continuous casting of metal in a tapered mold and mold per se
EP0498296B2 (en) * 1991-02-06 2000-12-06 Concast Standard Ag Mould for continuous casting of metals, especially of steel
US5409053A (en) * 1991-02-06 1995-04-25 Concast Standard Ag Continuous casting mold
CN2288799Y (en) * 1996-12-11 1998-08-26 刘治 Small square billet continuous caster mould
JP4164163B2 (en) * 1998-07-31 2008-10-08 株式会社神戸製鋼所 Metal casting mold
US6374903B1 (en) 2000-09-11 2002-04-23 Ag Industries, Inc. System and process for optimizing cooling in continuous casting mold

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004043628A1 *

Also Published As

Publication number Publication date
BR0316249B1 (en) 2011-10-04
KR20050071681A (en) 2005-07-07
CN1325196C (en) 2007-07-11
CA2506078C (en) 2012-05-15
UA79025C2 (en) 2007-05-10
AU2003273929A1 (en) 2004-06-03
CA2506078A1 (en) 2004-05-27
WO2004043628A1 (en) 2004-05-27
KR101060114B1 (en) 2011-08-29
RU2320453C2 (en) 2008-03-27
CN1711144A (en) 2005-12-21
DE10351348A1 (en) 2004-06-03
RU2005118100A (en) 2006-01-20
PL375369A1 (en) 2005-11-28
BR0316249A (en) 2005-10-04

Similar Documents

Publication Publication Date Title
EP0323958A1 (en) Device for continuous casting of flat slabs.
DE3411359A1 (en) CONTINUOUS CHOCOLATE FOR ROUND OR BLOCK CROSS SECTIONS, ESPECIALLY FOR THE POURING OF LIQUID STEEL
EP1317978B1 (en) Mould pipe for continuous casting of metals
DE4306943C2 (en) Starting head for a vertical continuous caster
EP1792675B1 (en) Mold for continuous casting of metal
DE4403049C1 (en) Continuous caster and method for producing thin slabs
EP1567295A1 (en) 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
EP0627968B1 (en) Process for the continous casting of metal, in particular steel for producing billets and blooms
DE3340844C1 (en) Continuous casting mold with cooling device for casting metal, especially steel
EP0904873B2 (en) Gate geometry of a continuous casting mould for metal
DE2853867C2 (en) Process for avoiding cracks in the edge area of metal strands cast in a continuous casting mold as well as additive and device for carrying out the process
DE4138642C2 (en)
EP3308878B1 (en) Mould for strand casting of metals
EP0920936B1 (en) Mould for continuous casting
DE2758514A1 (en) STRAND STEEL CASTING GRILL FOR STUD AND BLOCK STRIPS
DE4403048C1 (en) Continuous caster and process for producing rectangular thin slabs
EP2897746B1 (en) Apparatus for the continuous casting of metals
EP1206986B1 (en) Continuous casting mould, especially for casting billet strands and blooms
CH363129A (en) Process for the continuous casting of metal strands and a permanent mold for carrying out the process
EP0900609B1 (en) Submerged nozzle for feeding a molten metal from a casting vessel or a tundish into a mould
EP1019208A1 (en) Mould pipe for a continuous casting mould for the continuous casting of steels, especially peritectic steels
DE3206987C2 (en) Casting mold for the production of hollow castings
DE550627C (en) Process for the production of copper sheets and bars by rolling out wedge-shaped bars
EP0869853B1 (en) Method for continuous thin slab metal casting
DE2426692C3 (en) Method and device for cooling the strand forming in an oscillating mold during the continuous casting of steel

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20050506

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

DAX Request for extension of the european patent (deleted)
RIN1 Information on inventor provided before grant (corrected)

Inventor name: PLOCIENNIK, UWE

Inventor name: KOCKENTIEDT, JOSEF

Inventor name: LETZEL, DIRK

Inventor name: ZAJBER, ADOLF, GUSTAV

18R Application refused

Effective date: 20061106

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

R18R Application refused (corrected)

Effective date: 20060914