EP1307305A1 - Method and strand guide for supporting, guiding and cooling casting strands made of steel, especially preliminary sections for girders - Google Patents

Method and strand guide for supporting, guiding and cooling casting strands made of steel, especially preliminary sections for girders

Info

Publication number
EP1307305A1
EP1307305A1 EP01965178A EP01965178A EP1307305A1 EP 1307305 A1 EP1307305 A1 EP 1307305A1 EP 01965178 A EP01965178 A EP 01965178A EP 01965178 A EP01965178 A EP 01965178A EP 1307305 A1 EP1307305 A1 EP 1307305A1
Authority
EP
European Patent Office
Prior art keywords
strand
support
casting
cooling
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.)
Granted
Application number
EP01965178A
Other languages
German (de)
French (fr)
Other versions
EP1307305B1 (en
Inventor
Adolf Gustav Zajber
Dirk Letzel
Wilfried Milewski
Thomas Fest
Heinz Dietrich Schneider
Lothar Fischer
Herbert Brotski
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
Priority claimed from DE10133093A external-priority patent/DE10133093A1/en
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1307305A1 publication Critical patent/EP1307305A1/en
Application granted granted Critical
Publication of EP1307305B1 publication Critical patent/EP1307305B1/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
    • B22D11/009—Continuous casting of metals, i.e. casting in indefinite lengths of work of special cross-section, e.g. I-beams, U-profiles
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal

Definitions

  • Process and strand guide for supporting, guiding and cooling cast strands made of steel, in particular of pre-profiles for beams
  • the invention relates to a method and a strand guide for supporting, guiding and cooling steel casting strands, in particular BBL pre-profiles for supports, in which the casting strand is further cooled by spray water in a zero segment by means of secondary cooling and in subsequent support segments after leaving the continuous casting mold and is pulled out.
  • the function of the strand guide not only includes supporting the casting strand against the ferrostatic pressure, but also removing the heat of solidification through the secondary cooling and maintaining the profile geometry that is generated in the continuous casting mold. However, surface cracks still appear.
  • the aim of the strand guide must be a flawless surface quality of the casting strand, an interior quality without cracks and without segregation with a high degree of profile accuracy.
  • the invention is based on the object of avoiding cracks in the microstructure, in particular surface cooling cracks, by adapting the cooling conditions of the strand surface in the region of the secondary cooling, and in this in particular undercooling the strand shell.
  • the object is achieved with a method according to the preamble of claim 1 in that, in order to avoid an undesired solidification structure on the upper flange edges or in other cross-sectional areas, the cooling and support of the beam blank format is adapted to the solidification areas in such a way that only in areas in which Swamp formation is present, cooled and supported.
  • One embodiment of the method provides that the casting strand is cooled by targeted temperature control in upper support segments with widths of the spray water jets on the longitudinal and transverse sides of the casting strand cross section corresponding to at least the length of the supporting rollers and decreasing on the transverse sides of the casting strand cross section analogously to the length of the strand path and the cooling state supported and is only cooled with spray water jets directed at the liquid core zones with the same or smaller width of the sump side. This avoids undercooling of the strand shell, and the risk of cracks, in particular surface cracks, is considerably reduced.
  • the casting strand be supported by targeted temperature control in the zero support segment on its profile ends and in the longitudinal side center region of its cross section and on the transverse sides, and thereby the longitudinal sides and transverse sides of the casting strand cross section, with the exception of the casting strand profile corner regions, are cooled, and that with the formation of strand shells progressing along the strand path length, only the middle region and the two transverse sides of the casting strand cross section are supported, and in the region of the sump tips of the core zones the transverse sides in the region of the sump tip or the sump tips are supported and cooled to a limited extent and on the On the long sides, only spray water jets directed towards the swamp zone can be used.
  • the targeted temperature control can also be accomplished in such a way that the casting strand is guided in the state of extensive solidification without splashing water jets and without top and side support, lying on support rollers.
  • the object is further achieved according to the invention by means of guidance and cooling in that the casting strand can be subjected to a targeted temperature control in the individual support segments, secondary cooling adapted to the extrusion profile being usable from support segment to support segment, and that to zero Support segment following support segments are designed so open that excess spray water can be derived from the casting strand cross section in a plurality of directions.
  • a targeted temperature control in the individual support segments secondary cooling adapted to the extrusion profile being usable from support segment to support segment, and that to zero Support segment following support segments are designed so open that excess spray water can be derived from the casting strand cross section in a plurality of directions.
  • the temperature-controlled cooling and support in the form according to the invention achieve the following effects: minimized water spray quantity only for dissipating the heat of solidification
  • the strand guide segments should be adapted to the process engineering requirements during training.
  • the training is therefore carried out in the following way: - Support rollers that only support in the swamp area
  • the support and secondary cooling are designed according to further features such that in the zero support segment, long sides of the casting strand cross section are supported by means of longer supporting roller pairs arranged symmetrically and the casting strand profile corner regions are supported by means of tipper roller pairs of shorter length, and that the transverse sides of the casting strand cross section are correspondingly long by means of approximately the side length Support roller pairs are supported.
  • Such support is e.g. advantageous for strand shell thicknesses between 30 and 50 mm. Support is provided practically from all sides only in the sump profile in order to avoid unwanted hypothermia.
  • Another embodiment provides that in the following support segments on the long sides of the casting strand cross section only the longer support roller pairs arranged in the center symmetrically, and on the transverse sides the support roller pairs corresponding approximately to the side length are provided.
  • the strand shell thickness can already be assumed to be between 40 and 60 mm, so that the corner areas of the casting strand cross section no longer have to be supported.
  • a further reduction in the supporting forces takes place according to other features, in that the successive supporting segments each have those on the transverse sides symmetrically arranged pairs of support rollers are shortened. It is assumed that central areas of the casting strand have already solidified here, and that the strand shell has a thickness of approximately 50 to 70 mm in outer areas.
  • An improvement provides that the spray pattern of the secondary cooling is designed analogously to the pouring sump core zone. This avoids excessive water exposure.
  • a further embodiment provides that an equally wide or wider spray water jet is assigned to a long support roller. This measure is particularly applicable to relatively thin strand shells of approximately 30 to 60 mm.
  • an embodiment can consist in that tipping rollers are only provided in a support segment that follows the zero support segment.
  • 1 is a side view of a casting strand with the strand shell thicknesses assigned to the casting strand path for a pre-profile casting strand
  • FIG. 2B the casting strand cross section with support roller arrangement and secondary cooling in the zero segment
  • FIG. 2C the casting strand cross section with support roller arrangement and secondary cooling in a subsequent support segment, and secondary cooling in the next support segment
  • FIG. 2F shows the casting strand cross section before solidification, without secondary cooling
  • FIG. 2G shows the casting strand cross section with solidification almost complete
  • FIG. 2H shows the casting strand cross section lying on the roller table after complete solidification
  • FIG. 3 shows a perspective view of a support segment
  • Fig. 4A is a perspective section through the support segment
  • Fig. 5 is a perspective side view in cross section of a zero
  • FIG. 6 is a perspective view of the zero support segment in an open configuration.
  • a casting strand 1 for a preliminary profile 2, from which carriers are rolled, is shown (FIGS. 1 and 1A).
  • the casting strand 1 is cooled in a zero support segment 4 with secondary cooling and subsequently in further support segments 5, 6 and 7 by spray water jets 8 and is pulled out by driven rollers of a pull-out machine 9.
  • the strand shell thicknesses are specified in mm at a distance of 2 m to 2 m.
  • the length L denotes the total length of the system from the continuous casting mold 3 to the pulling-out machine 9.
  • the radii R1, R2 and R3 define the arc of the strand course.
  • the casting strand 1 is acted upon by a targeted temperature control in the (upper) zero support segment 4 with spray water jets 8 which have a width 10 that is equal to or greater than the length 11 of the support roller pairs 12.
  • Such spray water jets 8 are on the long side 13 and used on the transverse side 14 of the casting strand cross section 1 a (Fig. 2A-2H).
  • the transverse sides 14 are supported in a decreasing manner (FIGS. 2D-2F) and the spray water jets 8 are only directed onto the core zones 15 (FIG. 2D) ,
  • the true-to-shape casting strand 1 produced in the continuous casting mold 3 enters the zero support segment 4 (FIG. 2B), in which the casting strand 1 by means on the long side 13 in the long side center region 16 arranged support rollers 17 and support rollers 18 arranged on the transverse sides 14 is supported.
  • the cast strand profile corner regions 19 are not cooled, but are supported by means of tip rollers 20.
  • the spray water jets 8 each form an angle that opens in the direction of flow with respect to the strand that is still in the liquid or viscous region and its strand width or strand thickness.
  • the spray water jets 8 are maintained in a wide range.
  • FIG. 2D it can be seen immediately that only the central region 16 of the casting strand cross section 1a is supported by support rollers 17, but is no longer cooled.
  • the spray water jets 8 are only directed to the core zones 15.
  • the support rollers 18 are kept considerably shorter. This targeted temperature control continues in the strand running path (FIG.
  • the core zone 15 (FIG. 2F) is very small, so that the casting strand 1 no longer has to be cooled at all and is only guided on the transverse sides 14 by means of the support rollers 18.
  • the core zones 15 are further reduced and the casting strand 1 is only guided on the horizontal support rollers 22.
  • the casting strand 1 has solidified.
  • the thickness of the strand shell 21 is, for example (depending on the respective casting cross-sectional dimensions) in each case in FIG. 2B with 38.2 mm, in FIG. 2C with 54.0 mm, in FIG. 2D with 66.1 mm, in FIG. 2E with 76.4 mm, in Fig. 2F with 85.4 mm, in Fig. 2G with 93.5 mm and in Fig. 2H with 101.0 mm.
  • 4A and 4B show the respective outflow of the spray water 29 running in the arrow directions 28.
  • the outflow is made possible in particular by an “open” design of the support segments 5, 6, 7, wherein the casting strand cross section 1 a starts from an open frame outer ribs 30, reinforcements 31, inner ribs 32 and a respective nozzle stock 33 is surrounded on four sides.
  • 4A corresponds approximately to the length of the strand path in FIGS. 2B and 2C.
  • 4B corresponds to the strand path length of FIG. 2D.
  • FIG. 5 shows a vertical section through the support segment 5, 6, 7 drawn in the operating position, the open configuration of a support segment 5, 6, 7 being particularly easy to recognize.
  • the spray water 29 directed from the nozzle sticks 33 by the spray water jets 8 against the casting strand cross section 1 a can easily flow off between the reinforcements 31 all around.
  • FIG. 6 a support roller stand 5, 6, 7 in the configuration described for FIG. 3 is drawn in view in the operating position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

A method and strand guide for supporting, guiding and cooling casting strands (1) made of steel, especially preliminary sections (2) for girders, which are cooled by injected water (29) and are drawn. The inventive method prevents cracks, especially surface cracks, from appearing in the microstructure by adapting the cooling conditions of the surface of the strand during secondary cooling. Undercooling of the chill of the strand is prevented by adapting the cooling and support of the beam blank format to the solidification range in order to avoid an undesirable solidification structure on the upper flange edges or in other cross-sectional areas so that cooling and support are provided exclusively where a crater is formed. The casting strand (1) is cooled by guiding the temperature in a specific manner in upper supporting segments (5, 6, 7) by means of injected water jets whose width at least matches the length of the supporting rollers on longitudinal and transversal sides (13, 14) of the cross section (1a) of the casting strand, and is decreasingly supported in an analogous manner with respect to the length of the casting path and the cooling state in core areas (15) of the cross section (1a) of the casting strand on the transversal sides (14) of said casting strand cross section (1a) and cooling occurs exclusively by means of water jets (8) which are oriented towards said core areas (15).

Description

Verfahren und Strangführung zum Stützen, Führen und Kühlen von Gießsträngen aus Stahl, insbesondere von Vorprofilen für TrägerProcess and strand guide for supporting, guiding and cooling cast strands made of steel, in particular of pre-profiles for beams
Die Erfindung betrifft ein Verfahren und eine Strangführung zum Stützen, Führen und Kühlen von Gießsträngen aus Stahl, insbesondere von BBL-Vorprofilen für Träger, bei dem der Gießstrang nach Verlassen der Stranggießkokille in einem Null-Segment mittels Sekundärkühlung und in nachfolgenden Stützsegmenten weiter durch Spritzwasser gekühlt und ausgezogen wird.The invention relates to a method and a strand guide for supporting, guiding and cooling steel casting strands, in particular BBL pre-profiles for supports, in which the casting strand is further cooled by spray water in a zero segment by means of secondary cooling and in subsequent support segments after leaving the continuous casting mold and is pulled out.
Aus der JP 42 00 844 ist es bekannt, in einer Strangführung für die Gießquer- schnitts-Längsseiten einzelne Stützrollen, teils als Tipprollen, teils als im Profilgrund angeordneten Längsrollen geringer Länge, einzusetzen. An den Gießquerschnitts-Breitseiten sind dann entsprechend lange Stützrollen angeordnet. Diese Anordnung nimmt jedoch keine Rücksicht auf die an den betreffenden Gießstrang-Stellen vorhandenen Strangschalendicken und die erforder- liehe Kühlung.From JP 42 00 844 it is known to use individual support rollers in a strand guide for the longitudinal sides of the casting cross section, partly as tipping rollers and partly as longitudinal rollers of short length arranged in the base of the profile. Correspondingly long support rollers are then arranged on the broad casting cross-sections. However, this arrangement does not take into account the strand shell thicknesses present at the relevant casting strand locations and the cooling required.
Es ist zu berücksichtigen, dass die Funktion der Strangführung nicht nur das Stützen des Gießstranges gegen den ferrostatischen Druck umfasst, sondern auch den Entzug der Erstarrungswärme durch die Sekundärkühlung und die Erhaltung der Profilgeometrie, die in der Stranggießkokille erzeugt wird. Es treten jedoch immer noch Oberflächenrisse auf.It must be taken into account that the function of the strand guide not only includes supporting the casting strand against the ferrostatic pressure, but also removing the heat of solidification through the secondary cooling and maintaining the profile geometry that is generated in the continuous casting mold. However, surface cracks still appear.
Das Ziel der Strangführung muss eine fehlerfreie Oberflächenqualität des Gießstranges, eine Innenqualität ohne Risse und ohne Seigerungen bei hoher Pro- filtreue sein.The aim of the strand guide must be a flawless surface quality of the casting strand, an interior quality without cracks and without segregation with a high degree of profile accuracy.
Der Erfindung liegt die Aufgabe zugrunde, Risse in der Gefügestruktur, insbesondere Oberflächenkühlrisse, durch Anpassung der Abkühlbedingungen der Strangoberfläche im Bereich der Sekundärkühlung, und in dieser insbesondere eine Unterkühlung der Strangschale, zu vermeiden. Die Aufgabe wird mit einem Verfahren gemäß Oberbegriff von Anspruch 1 erfindungsgemäß dadurch gelöst, dass zur Vermeidung einer unerwünschten Erstarrungsstruktur auf den Flanschoberkanten oder in anderen Querschnittsbereichen die Kühlung und Stützung des Beam Blank-Formates den Erstarrungsbereichen derart angepaßt wird, dass nur in Bereichen, bei welchen Sumpf aus- bildung vorliegt, gekühlt und gestützt wird.The invention is based on the object of avoiding cracks in the microstructure, in particular surface cooling cracks, by adapting the cooling conditions of the strand surface in the region of the secondary cooling, and in this in particular undercooling the strand shell. The object is achieved with a method according to the preamble of claim 1 in that, in order to avoid an undesired solidification structure on the upper flange edges or in other cross-sectional areas, the cooling and support of the beam blank format is adapted to the solidification areas in such a way that only in areas in which Swamp formation is present, cooled and supported.
Eine Ausgestaltung des Verfahrens sieht dabei vor, dass der Gießstrang durch gezielte Temperaturführung in oberen Stützsegmenten mit zumindest der Länge der Stützrollen entsprechenden Breiten der Spritzwasserstrahlen an Längs- und Querseiten des Gießstrangquerschnitts gekühlt und analog zur Strangweglänge und dem Abkühlungszustand in Kernzonen des Gießstrangquerschnitts an dessen Querseiten abnehmend gestützt und nur noch mit auf die flüssigen Kernzonen gerichteten Spritzwasserstrahlen mit gleicher oder kleinerer Breite der Sumpfseite gekühlt wird. Dadurch wird eine Unterkühlung der Strangschale vermieden, und die Gefahr von Rissen, insbesondere von Oberflächenrissen, wird erheblich reduziert.One embodiment of the method provides that the casting strand is cooled by targeted temperature control in upper support segments with widths of the spray water jets on the longitudinal and transverse sides of the casting strand cross section corresponding to at least the length of the supporting rollers and decreasing on the transverse sides of the casting strand cross section analogously to the length of the strand path and the cooling state supported and is only cooled with spray water jets directed at the liquid core zones with the same or smaller width of the sump side. This avoids undercooling of the strand shell, and the risk of cracks, in particular surface cracks, is considerably reduced.
In weiterer Ausgestaltung der Erfindung wird vorgeschlagen, dass der Gießstrang durch gezielte Temperaturführung im Null-Stützsegment an seinen Pro- filenden und im Längsseiten-Mittenbereich seines Querschnitts sowie an den Querseiten gestützt, und dabei Längsseiten und Querseiten des Gießstrangquerschnitts, ausgenommen die Gießstrang-Profileckbereiche, gekühlt werden, und dass bei auf der Strangweglänge fortschreitender Strangschalenbildung nur noch der Mittenbereich und die beiden Querseiten des Gieß- Strangquerschnitts gestützt werden, und im Bereich der Sumpfspitzen der Kernzonen die Querseiten im Bereich der Sumpfspitze bzw. der Sumpfspitzen eingeschränkt gestützt und gekühlt und an den Längsseiten nur noch auf die Sumpfzone gerichtete Spritzwasserstrahlen eingesetzt werden. Dadurch kann eine gezielte Temperaturführung abhängig von den Querschnitts-Zonen des Gießstrangquerschnitts nicht nur bei rechteckigem Gießstrangquerschnitt, sondern auch bei Profilsträngen erzielt werden. Weitere Erfindungs-Merkmalen sehen vor, dass im Bereich der Sumpfzone der Gießstrangquerschnitt an seinen Querseiten ohne Spritzwasserkühlung gestützt wird. Vorteilhafterweise erfolgt dabei ein Wärmefluss von heißeren Zonen in bereits abgekühlte Zonen ohne großen Temperatursprung.In a further embodiment of the invention, it is proposed that the casting strand be supported by targeted temperature control in the zero support segment on its profile ends and in the longitudinal side center region of its cross section and on the transverse sides, and thereby the longitudinal sides and transverse sides of the casting strand cross section, with the exception of the casting strand profile corner regions, are cooled, and that with the formation of strand shells progressing along the strand path length, only the middle region and the two transverse sides of the casting strand cross section are supported, and in the region of the sump tips of the core zones the transverse sides in the region of the sump tip or the sump tips are supported and cooled to a limited extent and on the On the long sides, only spray water jets directed towards the swamp zone can be used. As a result, targeted temperature control depending on the cross-sectional zones of the casting strand cross section can be achieved not only with a rectangular casting strand cross section, but also with profile strands. Further features of the invention provide that in the area of the sump zone, the cross-section of the casting strand is supported on its transverse sides without water spray cooling. Advantageously, heat flows from hotter zones into zones that have already cooled down without a large temperature jump.
Die gezielte Temperaturführung kann ferner dahingehend vollendet werden, dass der Gießstrang im Zustand weitgehender Durcherstarrung ohne Spritzwasserstrahlen und ohne oberes und seitliches Stützen, auf Stützrollen aufliegend, geführt wird.The targeted temperature control can also be accomplished in such a way that the casting strand is guided in the state of extensive solidification without splashing water jets and without top and side support, lying on support rollers.
Die Aufgabe wird weiterhin durch Mittel der Führung und der Kühlung erfindungsgemäß dadurch gelöst, dass der Gießstrang einer gezielten Temperaturführung in den einzelnen Stützsegmenten unterziehbar ist, wobei von Stützsegment zu Stützsegment eine an das Strangprofil angepasste Sekundärküh- lung einsetzbar ist, und dass die auf das Null-Stützsegment folgenden Stützsegmente derart offen ausgebildet sind, dass überschüssiges Spritzwasser in einer Vielzahl von Richtungen vom Gießstrangquerschnitt ableitbar ist. Dadurch wird über eine prozessgerechte Sekundärkühlung durch gezielte Stützsegmentausbildung mit einer optimalen Anordnung von Strangführungsrollen die Tendenz zur Unterkühlung von Strangecken (Flanschecken) mit schlechtem Duktilitätsverhalten vermieden und damit das Entstehen von Rissen in der Gefügestruktur und an der Oberfläche vermieden. Dabei kann auch eine homogenere Temperaturverteilung im Gießstrangquerschnitt erzielt werden.The object is further achieved according to the invention by means of guidance and cooling in that the casting strand can be subjected to a targeted temperature control in the individual support segments, secondary cooling adapted to the extrusion profile being usable from support segment to support segment, and that to zero Support segment following support segments are designed so open that excess spray water can be derived from the casting strand cross section in a plurality of directions. In this way, the tendency towards subcooling of strand corners (flange corners) with poor ductility behavior is avoided by process-oriented secondary cooling through targeted support segment formation with an optimal arrangement of strand guide rollers, and thus the formation of cracks in the microstructure and on the surface is avoided. A more homogeneous temperature distribution in the cross-section of the casting strand can also be achieved.
Durch die temperaturgeführte Kühlung und Stützung in der erfindungsgmäßen Form werden folgende Effekte erzielt: minimierte Wasserspritzmenge nur zur Abführung der ErstarrungswärmeThe temperature-controlled cooling and support in the form according to the invention achieve the following effects: minimized water spray quantity only for dissipating the heat of solidification
Reduzierung von Laufwasser wegen Unterkühlung der Flanschoberseiten und anderer Querschnittsbereiche - Homogenes Temperaturbild im BBL-QuerschnittReduction of running water due to subcooling of the flange top and other cross-sectional areas - homogeneous temperature pattern in the BBL cross-section
Temperaturführung von der Kokille bis in den Richttreiberbereich - Einstellung von Oberflächentemperaturen im günstigen DuktilitätsbereichTemperature control from the mold to the directional driver area - Setting of surface temperatures in the favorable ductility range
Die Strangführungssegmente sollen in der Ausbildung den verfahrenstechnischen Anforderungen angepaßt sein. Deshalb erfolgt die Ausbildung in folgender Art: - Stützrollen, die nur im Sumpfbereich stützenThe strand guide segments should be adapted to the process engineering requirements during training. The training is therefore carried out in the following way: - Support rollers that only support in the swamp area
Segmentausbildung so, dass die Flanschoberseiten nicht überdeckt werdenForm the segment so that the flange tops are not covered
Sicherstellung optimaler Wasserablaufeigenschaften Wasserauffang- und Leitbleche an den Segmentoberseiten, so dass mög- liehst wenig Laufwasser anfällt.Ensuring optimal water drainage properties Water collecting and baffle plates on the top of the segment, so that as little running water as possible is generated.
Die Stützung und Sekundärkühlung sind nach weiteren Merkmalen derart gestaltet, dass im Null-Stützsegment Längsseiten des Gießstrangquerschnitts mittels mittensymmetrisch angeordneten längeren Stützrollenpaaren und die Gießstrang-profil-Eckbereiche mittels Tipprollenpaaren kürzerer Länge gestützt sind, und dass die Querseiten des Gießstrangquerschnitts mittels etwa der Seitenlänge entsprechend langen Stützrollenpaaren gestützt sind. Eine derartige Stützung ist z.B. bei Strangschalendicken zwischen 30 und 50 mm vorteilhaft. Die Stützung erfolgt praktisch von allen Seiten nur im Sumpfprofil, um un- erwünschte Unterkühlungen zu vermeiden.The support and secondary cooling are designed according to further features such that in the zero support segment, long sides of the casting strand cross section are supported by means of longer supporting roller pairs arranged symmetrically and the casting strand profile corner regions are supported by means of tipper roller pairs of shorter length, and that the transverse sides of the casting strand cross section are correspondingly long by means of approximately the side length Support roller pairs are supported. Such support is e.g. advantageous for strand shell thicknesses between 30 and 50 mm. Support is provided practically from all sides only in the sump profile in order to avoid unwanted hypothermia.
Eine andere Ausgestaltung sieht vor, dass in folgenden Stützsegmenten an den Längsseiten des Gießstrangquerschnitts nur noch die mittensymmetrisch angeordneten, längeren Stützrollenpaare, und an den Querseiten die etwa der Sei- tenlänge entsprechenden Stützrollenpaare vorgesehen sind. Hier kann die Strangschalendicke schon zwischen 40 bis 60 mm angenommen werden, so dass die Eckbereiche des Gießstrangquerschnitts nicht mehr gestützt werden müssen.Another embodiment provides that in the following support segments on the long sides of the casting strand cross section only the longer support roller pairs arranged in the center symmetrically, and on the transverse sides the support roller pairs corresponding approximately to the side length are provided. Here, the strand shell thickness can already be assumed to be between 40 and 60 mm, so that the corner areas of the casting strand cross section no longer have to be supported.
Eine weitere Verminderung der Stützkräfte erfolgt nach anderen Merkmalen, indem in einander folgenden Stützsegmenten jeweils die an den Querseiten symmetrisch angeordneten Stützrollenpaare verkürzt sind. Es wird davon ausgegangen, dass Mittenbereiche des Gießstrangs hier schon durcherstarrt sind, und die Strangschale in Außenbereichen ca. 50 bis 70 mm Dicke aufweist.A further reduction in the supporting forces takes place according to other features, in that the successive supporting segments each have those on the transverse sides symmetrically arranged pairs of support rollers are shortened. It is assumed that central areas of the casting strand have already solidified here, and that the strand shell has a thickness of approximately 50 to 70 mm in outer areas.
Bei weiter fortgeschrittener Erstarrung ist vorgesehen, dass in folgenden Stütz- Segmenten nur noch die an den Querseiten symmetrisch angeordneten, verkürzten Stützrollenpaare vorgesehen sind. Bei Vorprofil-Gießsträngen wird in den Eckbereichen des Gießstrangquerschnitts erfahrungsgemäß schon eine Strangschalendicke von 70 bis 90 mm angenommen.In the case of more advanced solidification, it is provided that only the shortened pairs of support rollers arranged symmetrically on the transverse sides are provided in the following support segments. Experience has shown that with pre-profile casting strands, a strand shell thickness of 70 to 90 mm is already assumed in the corner areas of the casting strand cross-section.
Dabei wird vorgeschlagen, dass der Gießstrang in Abschnitten weitgehender Kernerstarrung nur noch an der Unterseite auf Stützrollen aufliegt.It is proposed that the casting strand in sections of extensive solidification only rests on support rollers on the underside.
Eine Verbesserung sieht vor, dass das Spritzbild der Sekundärkühlung analog zur Gießsumpf-Kemzone ausgelegt ist. Dadurch kann eine zu hohe Wasserbe- aufschlagung vermieden werden.An improvement provides that the spray pattern of the secondary cooling is designed analogously to the pouring sump core zone. This avoids excessive water exposure.
Dabei ist mit Vorteil vorgesehen, dass überschüssiges Spritzwasser ableitbar ist. Dadurch fallen in der Mitte des Gießstrangs, z.B. auf dem Profilsteg eines Vorprofils, nur noch minimale Wassermengen nach der Strangstützung an.It is advantageously provided that excess spray water can be drained off. This causes falling in the middle of the casting strand, e.g. on the profile web of a preliminary profile, only minimal amounts of water after the strand support.
Eine weitere Ausgestaltung sieht vor, dass einer langen Stützrolle ein ebenso breiter oder breiterer Spritzwasserstrahl zugeordnet ist. Diese Maßnahme ist insbesondere bei relativ noch dünnen Strangschalen von ca. 30 bis 60 mm anwendbar.A further embodiment provides that an equally wide or wider spray water jet is assigned to a long support roller. This measure is particularly applicable to relatively thin strand shells of approximately 30 to 60 mm.
Und schließlich kann eine Ausgestaltung darin bestehen, dass Tipprollen nur noch in einem Stützsegment , das auf das Null-Stützsegment folgt, vorgesehen sind.And finally, an embodiment can consist in that tipping rollers are only provided in a support segment that follows the zero support segment.
In der Zeichnung sind Ausführungsbeipiele der Erfindung dargestellt und werden nachfolgend näher erläutert. Es zeigen:Exemplary embodiments of the invention are shown in the drawing and are explained in more detail below. Show it:
Fig. 1 einen Gießstrang in Seitenansicht mit dem Gießstrangweg zugeordneten Strangschalendicken für einen Vorprofil- Gießstrang,1 is a side view of a casting strand with the strand shell thicknesses assigned to the casting strand path for a pre-profile casting strand,
Fig. 1 A den Gießstrangquerschnitt in der Stranggießkokille,1A the casting strand cross section in the continuous casting mold,
Fig. 2A den Gießstrangquerschnitt am Ausgang der Stranggießkokille,2A the casting strand cross section at the exit of the continuous casting mold,
Fig. 2B den Gießstrangquerschnitt mit Stützrollenanordi ung und Sekundärkühlung im Null-Segment, Fig. 2C den Gießstrangquerschnitt mit Stützrollenanordnung und Sekundärkühlung in einem nachfolgenden Stützsegment, Fig. 2D den Gießstrangquerschnitt mit Stützrollenanordnung und Sekundärkühlung in einem weiteren Stützsegment, Fig. 2E den Gießstrangquerschnitt mit Stützrollenanordnung und Se- kundärkühlung im nächsten Stützsegment,2B the casting strand cross section with support roller arrangement and secondary cooling in the zero segment, FIG. 2C the casting strand cross section with support roller arrangement and secondary cooling in a subsequent support segment, and secondary cooling in the next support segment,
Fig. 2F den Gießstrangquerschnitt vor der Durcherstarrung, ohne Sekundärkühlung, Fig. 2G den Gießstrangquerschnitt bei nahezu vollzogener Durcherstarrung, Fig. 2H den Gießstrangquerschnitt nach vollständiger Durcherstarrung auf dem Rollgang aufliegend, Fig. 3 eine perspektivische Ansicht eines Stützsegmentes,2F shows the casting strand cross section before solidification, without secondary cooling, FIG. 2G shows the casting strand cross section with solidification almost complete, FIG. 2H shows the casting strand cross section lying on the roller table after complete solidification, FIG. 3 shows a perspective view of a support segment,
Fig. 4A ein perspektivischer Schnitt durch das Stützsegment mitFig. 4A is a perspective section through the support segment
Tipprollen, Fig. 4B ein perspektivischer Schnitt durch das Stützsegment ohne4B a perspective section through the support segment without
Tipprollen, Fig. 5 eine perspektivische Seiten-Ansicht im Querschnitt eines Null-Tip rollers, Fig. 5 is a perspective side view in cross section of a zero
Stützsegmentes in offener Ausbildung und Fig. 6 eine perspektivische Ansicht des Null-Stützsegmentes in offe- ner Ausbildung. Als Ausführungsbeispiel ist ein Gießstrang 1 für ein Vorprofil 2, aus dem Träger gewalzt werden, dargestellt (Fig. 1 und 1A). Der Gießstrang 1 wird nach dem Verlassen der Stranggießkokille 3 in einem Null-Stützsegment 4 mit einer Sekundärkühlung und nachfolgend in weiteren Stützsegmenten 5,6 und 7 durch Spritzwasserstrahlen 8 gekühlt und durch angetriebene Rollen einer Auszieh- maschine 9 ausgezogen.Support segment in an open configuration and FIG. 6 is a perspective view of the zero support segment in an open configuration. As an exemplary embodiment, a casting strand 1 for a preliminary profile 2, from which carriers are rolled, is shown (FIGS. 1 and 1A). After leaving the continuous casting mold 3, the casting strand 1 is cooled in a zero support segment 4 with secondary cooling and subsequently in further support segments 5, 6 and 7 by spray water jets 8 and is pulled out by driven rollers of a pull-out machine 9.
Im Abstand von 2 m zu 2 m sind die Strangschalendicken mit Dickenangabe in mm angegeben. Die Länge L bezeichnet die gesamte Anlagenlänge von der Stranggießkokille 3 bis zur Ausziehmaschine 9. Außerdem legen die Radien R1 , R2 und R3 den Bogen des Strangverlaufs fest.The strand shell thicknesses are specified in mm at a distance of 2 m to 2 m. The length L denotes the total length of the system from the continuous casting mold 3 to the pulling-out machine 9. In addition, the radii R1, R2 and R3 define the arc of the strand course.
Der Gießstrang 1 wird durch eine gezielte Temperaturführung in dem (oberen) Null-Stützsegment 4 mit Spritzwasserstrahlen 8 beaufschlagt, die eine Breite 10 aufweisen, die gleich oder größer ist als die Länge 11 der Stützrollenpaare 12. Solche Spritzwasserstrahlen 8 sind an der Längsseite 13 und an der Querseite 14 des Gießstrangquerschnitts 1 a eingesetzt ( Fig. 2A- 2H). Analog zur Strangweglänge und dem Abkühlungszustand in Kernzonen 15 , die noch zähflüssige Schmelze in dem Gießstrangquerschnitt 1a enthalten, werden die Querseiten 14 abnehmend gestützt (Fig. 2D - 2F) und die Spritzwasserstrahlen 8 werden nur noch auf die Kernzonen 15 gerichtet (Fig. 2D).The casting strand 1 is acted upon by a targeted temperature control in the (upper) zero support segment 4 with spray water jets 8 which have a width 10 that is equal to or greater than the length 11 of the support roller pairs 12. Such spray water jets 8 are on the long side 13 and used on the transverse side 14 of the casting strand cross section 1 a (Fig. 2A-2H). Analogous to the length of the strand path and the cooling state in core zones 15, which still contain viscous melt in the casting strand cross-section 1a, the transverse sides 14 are supported in a decreasing manner (FIGS. 2D-2F) and the spray water jets 8 are only directed onto the core zones 15 (FIG. 2D) ,
Entsprechend einem bestmöglichen Verfahren (Fig. 2A - 2H) tritt der formgetreue, in der Stranggießkokille 3 erzeugte Gießstrang 1 in das Null- Stützsegment 4 (Fig. 2B) ein, in dem der Gießstrang 1 mittels an der Längsseite 13 im Längsseiten-Mittenbereich 16 angeordnete Stützrollen 17 und an den Querseiten 14 angeordnete Stützrollen 18 gestützt wird. Dabei werden die Gießstrang-Profileckbereiche 19 nicht gekühlt, aber mittels Tipprollen 20 gestützt. Die Spritzwasserstrahlen 8 bilden jeweils gegenüber dem, sich noch im flüssigen oder zähflüssigen Bereich befindlichen Strang und dessen Strang- breite oder Strangdicke einen sich in Strömungsrichtung öffnenden Winkel. Dadurch wird nur dort Wärme in höherem Maße entzogen, wo sich im Inneren des Gießstranges 1 noch flüssige oder zähflüssige Schmelze befindet, währenddem bereits erstarrte Bereiche, im wesentlichen die übrige Strangschale 21 verschont bleibt. Dadurch kommt ein sanfteres Abkühlen der Strangecken zustande und deshalb entstehen weniger oder keine Oberflächenrisse. Gemäß Fig. 2C werden die Spritzwasserstrahlen 8 noch weit gefächert aufrechterhalten. In Fig. 2D ist sofort erkennbar, dass nur noch der Mittenbereich 16 des Gießstrangquerschnitts 1a mittels Stützrollen 17 gestützt wird, aber nicht mehr gekühlt wird. Die Spritzwasserstrahlen 8 sind nur noch auf die Kernzonen 15 gerichtet. Die Stützrollen 18 sind erheblich kürzer gehalten. Diese gezielte Temperaturführung setzt sich im Stranglaufweg (Fig. 2E) soweit fort, dass nur noch Spritzwasserstrahlen 8 an der Längsseite 13 auf die Kernzone 15 gerichtet werden. Schließlich ist die Kernzone 15 (Fig. 2F) sehr klein, so dass der Gießstrang 1 überhaupt nicht mehr gekühlt werden muss und nur noch mittels der Stützrollen 18 an den Querseiten 14 geführt wird. In Fig. 2G verkleinern sich die Kernzonen 15 weiter und der Gießstrang 1 wird nur noch auf den horizontalen Stützrollen 22 geführt. Gemäß Fig. 2H ist der Gießstrang 1 durcherstarrt. Die Dicke der Strangschale 21 ist beispielsweise (abhängig von den jeweiligen Gießquerschnittsabmessungen) jeweils in der Fig. 2B mit 38,2 mm, in der Fig. 2C mit 54,0 mm, in Fig. 2D mit 66,1 mm, in Fig. 2E mit 76,4 mm, in Fig. 2F mit 85,4 mm, in Fig. 2G mit 93,5 mm und in Fig. 2H mit 101 ,0 mm angegeben.According to the best possible method (FIGS. 2A-2H), the true-to-shape casting strand 1 produced in the continuous casting mold 3 enters the zero support segment 4 (FIG. 2B), in which the casting strand 1 by means on the long side 13 in the long side center region 16 arranged support rollers 17 and support rollers 18 arranged on the transverse sides 14 is supported. The cast strand profile corner regions 19 are not cooled, but are supported by means of tip rollers 20. The spray water jets 8 each form an angle that opens in the direction of flow with respect to the strand that is still in the liquid or viscous region and its strand width or strand thickness. As a result, heat is extracted to a greater extent only where there is inside the Casting strand 1 is still liquid or viscous melt, while already solidified areas, essentially the remaining strand shell 21 is spared. This results in a gentler cooling of the strand corners and therefore fewer or no surface cracks occur. According to FIG. 2C, the spray water jets 8 are maintained in a wide range. In FIG. 2D it can be seen immediately that only the central region 16 of the casting strand cross section 1a is supported by support rollers 17, but is no longer cooled. The spray water jets 8 are only directed to the core zones 15. The support rollers 18 are kept considerably shorter. This targeted temperature control continues in the strand running path (FIG. 2E) to such an extent that only spray water jets 8 on the long side 13 are directed onto the core zone 15. Finally, the core zone 15 (FIG. 2F) is very small, so that the casting strand 1 no longer has to be cooled at all and is only guided on the transverse sides 14 by means of the support rollers 18. In FIG. 2G, the core zones 15 are further reduced and the casting strand 1 is only guided on the horizontal support rollers 22. 2H, the casting strand 1 has solidified. The thickness of the strand shell 21 is, for example (depending on the respective casting cross-sectional dimensions) in each case in FIG. 2B with 38.2 mm, in FIG. 2C with 54.0 mm, in FIG. 2D with 66.1 mm, in FIG. 2E with 76.4 mm, in Fig. 2F with 85.4 mm, in Fig. 2G with 93.5 mm and in Fig. 2H with 101.0 mm.
In Fig. 3 ist eines der Stützsegmente 5,6,7 dargestellt. Danach sind wesentliche Baugruppen jeweils ein Oberrahmen 23, ein Unterrahmen 24, Seitenrahmen 25, Ausbaurollen 26 und Spritzlatten 27.3 shows one of the support segments 5, 6, 7. Thereafter, essential assemblies are each an upper frame 23, a lower frame 24, side frame 25, removal rollers 26 and spray battens 27.
Die Fig. 4A und 4B zeigen den in den Pfeilrichtungen 28 verlaufenden jeweiligen Abfluss des Spritzwassers 29. Der Abfluss wird insbesondere durch eine "offene" Gestaltung der Stützsegmente 5,6,7, ermöglicht, wobei der Gießstrangquerschnitt 1a ausgehend von einem offenen Rahmen jeweils von äußeren Rippen 30, Verstärkungen 31 , inneren Rippen 32 und jeweils einem Düsen- stock 33 an vier Seiten umgeben ist. Dabei entspricht die Darstellung der Fig. 4A etwa der Strangweglänge in den Fig. 2B und 2C. Die Darstellung der Fig. 4B entspricht der Strangweglänge der Fig. 2D.4A and 4B show the respective outflow of the spray water 29 running in the arrow directions 28. The outflow is made possible in particular by an “open” design of the support segments 5, 6, 7, wherein the casting strand cross section 1 a starts from an open frame outer ribs 30, reinforcements 31, inner ribs 32 and a respective nozzle stock 33 is surrounded on four sides. 4A corresponds approximately to the length of the strand path in FIGS. 2B and 2C. 4B corresponds to the strand path length of FIG. 2D.
Fig. 5 zeigt einen senkrechten Schnitt durch das in Betriebslage gezeichnete Stützsegment 5,6,7, wobei die offene Ausbildung eines Stützsegmentes 5, 6, 7 besonders leicht erkennbar ist. Das aus den Düsenstöcken 33 durch die Spritzwasserstrahlen 8 gegen den Gießstrangquerschnitt 1a gerichtete Spritzwasser 29 kann leicht zwischen den Verstärkungen 31 ringsum abfließen.5 shows a vertical section through the support segment 5, 6, 7 drawn in the operating position, the open configuration of a support segment 5, 6, 7 being particularly easy to recognize. The spray water 29 directed from the nozzle sticks 33 by the spray water jets 8 against the casting strand cross section 1 a can easily flow off between the reinforcements 31 all around.
Gemäß Fig. 6 ist ein Stützrollengerüst 5,6,7 in der zu Fig. 3 beschriebenen Ausbildung in Betriebsstellung in Ansicht gezeichnet. According to FIG. 6, a support roller stand 5, 6, 7 in the configuration described for FIG. 3 is drawn in view in the operating position.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Gießstrang1 casting strand
1a Gießstrangquerschnitt1a casting strand cross section
2 Vorprofil (Strangprofil)2 pre-profile (extruded profile)
3 Stranggießkokille3 continuous casting mold
4 Null-Stützsegment4 zero support segment
5 Stützsegment5 support segment
6 Stützsegment6 support segment
7 Stützsegment7 support segment
8 Spritzwasserstrahl8 water spray
9 Ausziehmaschine9 puller
10 Breite (des Spritzwasserstrahls)10 width (of the water jet)
11 Länge11 length
12 Stützrollenpaare12 pairs of support rollers
13 Längsseite (des Gießstrangs)13 long side (of the casting strand)
14 Querseite (des Gießstrangs)14 transverse side (of the casting strand)
15 Kernzone15 core zone
16 Längsseiten-Mittenbereich16 long side center area
17 Stützrolle17 support roller
18 Stützrolle18 support roller
19 Gießstrang-Profileckbereich 0 Tipprolle 1 Strangschale 2 horizontale Stützrolle19 Cast strand profile corner area 0 Tip roller 1 Strand shell 2 Horizontal support roller
23 Oberrahmen 4 Unterrahmen 5 Seitenrahmen 6 Ausbaurollen 7 Spritzlatte 8 Pfeilrichtung 9 Spritzwasser 0 äußere Rippen 1 Verstärkung 2 innere Rippen 3 Düsenstock 23 Upper frame 4 Lower frame 5 Side frame 6 Removal rollers 7 Spray bar 8 Direction of arrow 9 Splashing water 0 outer ribs 1 reinforcement 2 inner ribs 3 nozzle holder

Claims

Patentansprüche claims
1. Verfahren zum Stützen, Führen und Kühlen von Gießsträngen aus Stahl, insbesondere von Vorprofilen für Träger, bei dem der Gießstrang nach dem Verlassen der Stranggießkokille in einem Null-Segment in einer Sekundärkühlung und in nachfolgenden Stützsegmenten weiter durch Spritzwasser gekühlt und ausgezogen wird, dadurch gekennzeichnet, dass zur Vermeidung einer unerwünschten Erstarrungsstruktur auf den Flanschoberkanten oder in anderen Querschnittsbereichen die Kühlung und Stützung des Beam Blank-Formates den Erstarrungsbereichen derart angepaßt wird, dass nur in Bereichen, bei welchen Sumpfausbildung vorliegt, gekühlt und gestützt wird.1. A method for supporting, guiding and cooling steel casting strands, in particular pre-profiles for supports, in which the casting strand is further cooled and pulled out by splash water in a zero-segment in a secondary cooling and in subsequent supporting segments after leaving the continuous casting mold characterized in that in order to avoid an undesired solidification structure on the flange top edges or in other cross-sectional areas, the cooling and support of the beam blank format is adapted to the solidification areas in such a way that cooling and support are only provided in areas where sump formation is present.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass der Gießstrang durch gezielte Temperaturführung in oberen Stützsegmenten mit zumindest der Länge der Stützrollen entsprechenden Breiten der Spritzwasserstrahlen an Längs- und Querseiten des Gieß- Strangquerschnitts gekühlt und analog zur Strangweglänge und dem Abkühlungszustand in Kernzonen des Gießstrangquerschnitts an dessen Querseiten abnehmend gestützt und nur noch mit auf die flüssigen Kernzonen gerichteten Spritzwasserstrahlen mit gleicher oder kleinerer Breite der Sumpfseite gekühlt wird. 2. The method according to claim 1, characterized in that the casting strand is cooled by targeted temperature control in upper support segments with widths of the spray water jets corresponding to at least the length of the support rollers on the longitudinal and transverse sides of the casting strand cross section and analogously to the strand path length and the cooling state in core zones of the casting strand cross section is supported on the transverse sides in a decreasing manner and is only cooled with spray water jets directed at the liquid core zones with the same or smaller width of the sump side.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Gießstrang durch gezielte Temperaturführung im Null- Stützsegment an den Profilenden und im Längsseiten-Mittenbereich seines Querschnitts und an seinem Querseiten gestützt, und dessen Längs- und Querseiten, ausgenommen die Profileckbereiche, gekühlt werden, dass bei auf dem Strangweg fortschreitender Strangschalenbildung nur noch der Mittenbereich und die beiden Querseiten des Strangquerschnitts gestützt werden, und dass im Bereich der Sumpfspitzen der Kernzonen die Querseiten in deren Bereich eingeschränkt gestützt und gekühlt, und an den Längsseiten nur noch auf die Sumpfzone gerichtete Spritzwasserstrahlen eingesetzt sind.3. The method according to claim 1 or 2, characterized in that the casting strand is supported by targeted temperature control in the zero support segment at the profile ends and in the longitudinal side center region of its cross section and on its transverse sides, and its longitudinal and transverse sides, except the profile corner regions, cooled become that with the progressive formation of strand shells on the strand path only the central area and the two transverse sides of the strand cross section are still supported, and that in the area of the swamp tips of the core zones the transverse sides are supported and cooled to a limited extent in their area, and only spray water jets directed towards the swamp zone are used on the long sides.
4. Verfahren nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Gießstrangquerschnitt im Bereich der Sumpfzone an dessen Querseiten weiter ohne Spritzwasserkühlung gestützt wird.4. The method according to one or more of claims 1 to 3, characterized in that the casting strand cross section in the area of the sump zone on the transverse sides thereof is further supported without spray water cooling.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Gießstrang im Zustand weitgehender Durcherstarrung ohne Spritzwasserstrahlen und ohne oberes und seitliches Stützen auf Stütz- rollen aufliegend geführt wird.5. The method according to any one of claims 1 to 4, characterized in that the casting strand in the state of extensive solidification is carried out without splashing water jets and without top and side support on support rollers.
6. Strangführung für Gießstränge aus Stahl, insbesondere für Vorprofile von Trägern, umfassend ein an die Stranggießkokille anschließendes Null- Stützsegment und eine Sekundärkühlung mit Spritzwasserstrahlen sowie aufeinanderfolgende weitere Stützsegmente und eine Ausziehmaschine, dadurch gekennzeichnet, dass der Gießstrang (1) einer gezielten Temperaturführung in einzelnen Stützsegmenten (4,5,6,7) unterziehbar ist, wobei von Stützsegment (4) zu Stützsegment (7) eine an den Erstarrungszustand des Strangprofils (2) angepasste Sekundärkühlung einsetzbar ist, und dass die auf das Null-6. strand guide for casting strands made of steel, in particular for pre-profiles of supports, comprising a zero support segment adjoining the continuous casting mold and secondary cooling with water jets as well as successive further support segments and a pull-out machine, characterized in that the casting strand (1) has a targeted temperature control in individual Support segments (4, 5, 6, 7) can be subtracted, whereby from the support segment (4) to the support segment (7) a secondary cooling adapted to the solidification state of the extruded profile (2) can be used, and that the cooling to the zero
Stützsegment (4) folgenden Stützsegmente (5,6,7) derart offen ausgebildet sind, dass überschüssiges Spritzwasser (29) in einer Vielzahl von Richtungen (28) vom Gießstrangquerschnitt (1a) aus ableitbar ist.Support segments (4) following support segments (5, 6, 7) are designed to be open in such a way that excess spray water (29) can be discharged in a plurality of directions (28) from the casting strand cross section (1a).
7. Strangführung nach Anspruch 6, dadurch gekennzeichnet, dass im Null-Stützsegment (4) Längsseiten (13) des Gießstrangquerschnitts (1a) mittels mittig symmetrisch angeordneter längerer Stützrollenpaare (17) und Gießstrangprofil-Eckbereiche (19) mittels Tipprollenpaaren (20) gestützt sind, und dass die Querseiten (14) des Gießstrangquerschnitts (1a) mittels etwa der Seitenlänge entsprechend langen Stützrol- lenpaaren (18) gestützt sind.7. strand guide according to claim 6, characterized in that in the zero support segment (4) long sides (13) of the casting strand cross section (1a) are supported by means of longer, symmetrically arranged, longer support roller pairs (17) and casting strand profile corner areas (19) by means of tip roller pairs (20), and that the transverse sides (14) of the casting strand cross section (1a) are supported by means of pairs of support rollers (18) corresponding to the length of the side.
8. Strangführung nach einem der Ansprüche 6 oder 7, dadurch gekennzeichnet, dass in folgenden Stützsegmenten (5,6,7) an den Längsseiten (13) des Gießstrangquerschnitts (1a) nur noch mittig angeordnete, längere Stützrollenpaare (17) und an dessen Querseiten (14) etwa der Seitenlänge entsprechend lange Stützrollenpaare (18) vorgesehen sind.8. strand guide according to one of claims 6 or 7, characterized in that in the following support segments (5,6,7) on the longitudinal sides (13) of the casting strand cross section (1a) only centrally arranged, longer support roller pairs (17) and on the transverse sides thereof (14) long support roller pairs (18) corresponding to the side length are provided.
9. Strangführung nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass in folgenden Stützsegmenten (5,6,7) jeweils an den Querseiten (14) angeordnete Stützrollenpaare (18) verkürzt sind.9. strand guide according to one of claims 6 to 8, characterized in that in the following support segments (5,6,7) each on the transverse sides (14) arranged support roller pairs (18) are shortened.
10. Strangführung nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass in folgenden Stützsegmenten (5,6,7) nur noch an Querseiten (14) symmetrisch verkürzte Stützrollenpaare (18) vorgesehen sind.10. strand guide according to one of claims 6 to 9, characterized in that in the following support segments (5,6,7) only on transverse sides (14) symmetrically shortened support roller pairs (18) are provided.
11. Strangführung nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, dass der Gießstrang (1) in Abschnitten weitgehender Kernerstarrung nur noch an seiner Unterseite auf Stützrollen (22) aufliegt.11. strand guide according to one of claims 6 to 10, characterized in that the casting strand (1) rests in sections of extensive core solidification only on its underside on support rollers (22).
12. Strangführung nach einem der Ansprüche 6 bis 11 , dadurch gekennzeichnet, dass das Spritzbild der Sekundärkühlung analog zur Gießsumpf-Kernzone12. strand guide according to one of claims 6 to 11, characterized in that the spray pattern of the secondary cooling is analogous to the core area
(15) ausgelegt ist.(15) is designed.
13. Strangführung nach einem der Ansprüche 6 bis 12, dadurch gekennzeichnet, dass überschüssiges Spritzwasser (29) ableitbar ist.13. strand guide according to one of claims 6 to 12, characterized in that excess spray water (29) can be derived.
14. Strangführung nach einem der Ansprüche 6 bis 13, dadurch gekennzeichnet, dass einer langen Stützrolle (17; 18) jeweils ein ebenso breiter oder breite- rer Spritzwasserstrahl (8) zugeordnet ist.14. strand guide according to one of claims 6 to 13, characterized in that a long support roller (17; 18) is each assigned an equally wide or wider spray water jet (8).
15. Strangführung nach einem der Ansprüche 6 bis 14, dadurch gekennzeichnet, dass Tipprollen (20) nur noch in einem Stützsegment (5)), das auf das Null-Stützsegment (4) folgt, vorgesehen sind. 15. Strand guide according to one of claims 6 to 14, characterized in that tipping rollers (20) are only provided in a support segment (5)) which follows the zero support segment (4).
EP01965178A 2000-08-10 2001-08-07 Method and strand guide for supporting, guiding and cooling casting strands made of steel, especially preliminary sections for girders Expired - Lifetime EP1307305B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10039033 2000-08-10
DE10039033 2000-08-10
DE10133093 2001-07-11
DE10133093A DE10133093A1 (en) 2000-08-10 2001-07-11 Process and strand guide for supporting, guiding and cooling cast strands made of steel, in particular of pre-profiles for beams
PCT/EP2001/009092 WO2002011923A1 (en) 2000-08-10 2001-08-07 Method and strand guide for supporting, guiding and cooling casting strands made of steel, especially preliminary sections for girders

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EP1307305A1 true EP1307305A1 (en) 2003-05-07
EP1307305B1 EP1307305B1 (en) 2005-02-02

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EP01965178A Expired - Lifetime EP1307305B1 (en) 2000-08-10 2001-08-07 Method and strand guide for supporting, guiding and cooling casting strands made of steel, especially preliminary sections for girders

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EP (1) EP1307305B1 (en)
JP (1) JP2004505775A (en)
CN (1) CN1241700C (en)
AT (1) ATE288332T1 (en)
AU (1) AU2001285877A1 (en)
CA (1) CA2419069C (en)
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WO (1) WO2002011923A1 (en)

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Publication number Priority date Publication date Assignee Title
IT1400003B1 (en) * 2010-05-18 2013-05-09 Danieli Off Mecc CONTINUOUS CASTING DEVICE AND ITS PROCEDURE
EP2404686A1 (en) * 2010-07-09 2012-01-11 Siemens VAI Metals Technologies GmbH Roller holder for a line guide segment of a strand casting machine
IT201700034742A1 (en) 2017-03-29 2018-09-29 Danieli Off Mecc APPARATUS FOR CONTINUOUS CASTING AND ITS PROCEDURE
IT201700067508A1 (en) * 2017-06-16 2018-12-16 Danieli Off Mecc CONTINUOUS CASTING METHOD AND ITS APPARATUS

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
JPS5639158A (en) * 1979-09-04 1981-04-14 Kawasaki Steel Corp Continuous casting device for beam blank
JPS56128652A (en) * 1980-03-12 1981-10-08 Nippon Steel Corp Holding roll for beam blank
JPS57199555A (en) * 1981-06-03 1982-12-07 Kawasaki Steel Corp Roll stand for continuous casting machine for beam blank
JPH04200844A (en) * 1990-06-25 1992-07-21 Nkk Corp Cooling method for continuously casting steel beam blank
JP2856660B2 (en) * 1993-12-13 1999-02-10 日立造船株式会社 Slab support equipment for continuous casting equipment for near-net beam blanks
JPH09174210A (en) * 1995-12-27 1997-07-08 Kawasaki Steel Corp Method for continuously casting high mo steel

Non-Patent Citations (1)

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Title
See references of WO0211923A1 *

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EP1307305B1 (en) 2005-02-02
CA2419069A1 (en) 2003-02-05
CA2419069C (en) 2009-01-20
CN1241700C (en) 2006-02-15
WO2002011923A1 (en) 2002-02-14
ATE288332T1 (en) 2005-02-15
AU2001285877A1 (en) 2002-02-18
ES2236296T3 (en) 2005-07-16
CN1446132A (en) 2003-10-01
JP2004505775A (en) 2004-02-26

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