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EP0329639A1 - Procédé et installation de coulée continue d'acier - Google Patents

Procédé et installation de coulée continue d'acier Download PDF

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Publication number
EP0329639A1
EP0329639A1 EP89890028A EP89890028A EP0329639A1 EP 0329639 A1 EP0329639 A1 EP 0329639A1 EP 89890028 A EP89890028 A EP 89890028A EP 89890028 A EP89890028 A EP 89890028A EP 0329639 A1 EP0329639 A1 EP 0329639A1
Authority
EP
European Patent Office
Prior art keywords
mold
strand
cross
section
rollers
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
EP89890028A
Other languages
German (de)
English (en)
Other versions
EP0329639B1 (fr
Inventor
Anton Dipl.-Ing. Hulek
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0329639A1 publication Critical patent/EP0329639A1/fr
Application granted granted Critical
Publication of EP0329639B1 publication Critical patent/EP0329639B1/fr
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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/14—Soft reduction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/18—Vertical rolling pass lines

Definitions

  • the invention relates to a process for the continuous casting of steel, after which the melt is cast vertically in molds into a strand with an elongated cross-sectional shape and allowed to solidify during the mold passage, and to a continuous casting installation for carrying out this method.
  • strands with large thicknesses for example strand thicknesses of 210 mm, must be selected so that the slabs or blooms resulting from this continuous casting are enormous in the subsequent further processing into broadband with a thickness of only a few millimeters Cross-sectional reduction and, accordingly, also require expensive and complex systems.
  • a reducing mold For the continuous casting of thin slabs with a thickness of approx. 50 mm, a reducing mold has also already been proposed, which is designed as a moving plate mold made of conically converging plate chains, whereby a large inlet cross-section adapted to the pouring tube dimensions during the mold passage is reduced to a correspondingly reduced initial cross-section.
  • this reducing mold enables the production of relatively thin slabs under normal casting conditions, the achievable casting speeds remain too low for mechanical and metallurgical reasons for a direct control of the slabs to a rolling mill.
  • the difficult sealing of the Kokil lenhohlraumes, due to the wear on the sliding plate parts, susceptibility to failure and the like. very high demands are placed on the mold construction and it is questionable whether the simultaneous solidification and deformation of the strand does not lead to metallurgical defects.
  • the invention is therefore based on the object of eliminating these deficiencies and of specifying a method of the type described at the outset which ensures particularly economical casting of a thin strand suitable for direct further processing.
  • a low-cost and functionally reliable continuous casting plant is to be created which is ideally suited for carrying out this process.
  • the invention solves this problem essentially in that the strand is first cooled with a constant cross-section until a solid shell is formed, in particular solidified in the narrow side areas, whereupon the strand is progressively deformed and pressed into a flat strip during further cooling and solidification .
  • the strand can therefore be cast with a sufficiently large cross-section, for example with a thickness of approx. 150 mm, and remains undeformed until a suitably strong and resilient shell is properly formed, so that the casting process, the start of solidification and the initial shell formation can proceed completely without any problems.
  • a strand is cast with a parallelogram cross section, the deformation and compression of which then takes place in the direction of the smaller cross section height.
  • a parallelogram-shaped cross section results in a large central area corresponding to the use of conventional pouring tubes and also brings along narrow converging sides along the longer diagonal, which favor the formation of a rigid shell in these areas. Apart from that, this parallelogram cross section can be compressed into a plane-parallel band without too much change in shape.
  • a rational continuous casting installation for carrying out this method results from the combination of a first mold with a constant cavity cross section and a second mold downstream of this with a decreasing cavity cross section.
  • the first mold used is a moving plate mold known per se, which consists of a pair of opposing, endlessly rotating plate chains which delimit between the mold cavity, and that the second mold, designed as a stationary mold, continues the plate chains has two wall parts delimiting between the mold cavity, which are mounted so as to be pivotable about transverse axes lying in the inlet region, the mold cavity merging from an input cross-section corresponding to the output cross-section of the first mold into a flat-plane-parallel output cross-section.
  • the moving first mold can be of any length, for example 3000 mm long, so that a shell thickness of 10 mm can be achieved at the mold outlet at the desired high casting speed of, for example, 27 m / min. Due to the moving plate chains there is no sliding friction and the high ferrostatic pressure results in favorable heat transfer conditions between the strand and the mold, so that the required shell thickness is actually guaranteed despite the high casting speed.
  • the strand emerging from the moving plate mold is then taken over by the reducing but stationary mold, which, with its appropriately adjusted wall parts, performs the required cross-sectional reduction.
  • the wall parts can be swiveled so that the stationary mold can be opened at the start of casting in order to avoid faults when the first strand is passed.
  • the wall parts are then placed on the strand and brought into the respective reducing position via the actuators, with no lateral closure in the reducing mold of the mold cavity is required and the design effort for this mold can remain relatively low.
  • the strand then leaves the reducing mold as a flat pre-strip with a thickness of about 20 mm and with a flow rate of 27 to 30 m / min, so that this pre-strip is suitable for immediate tapping of a rolling mill, both in terms of its thickness and its outlet speed.
  • the casting performance achievable in this way corresponds to the required performance of a broadband rolling mill and thus the supply of such a broadband rolling mill is possible by a single continuous casting installation according to the invention, for which two slab continuous casting installations were previously necessary.
  • the plates of the two plate chains which are assigned to one another in pairs are angled and complement one another in cross section to form a parallelogram, the plates being supported against one another with an edge web butting against the other plate, and the wall parts of the stationary mold are divided into several individual longitudinal beams, which each have their own actuators, preferably hydraulic drives, result in particularly good conditions for carrying out the continuous casting process.
  • the cast strand is produced by the plate chains with a parallelogram-shaped cross section, which on the narrow sides, corresponding to the edge webs, already has a dimensioning adapted to the desired thickness of the preliminary strip and can be easily deformed into a flat preliminary strip.
  • the plates assigned to one another in pairs can also be adjusted transversely to the direction of passage in order to be able to change the cross-sectional dimensions.
  • the wall parts can also be adjusted exactly here to the respective cross-sectional shape of the strand possible. Apart from this, the strand is deformed into strips by the individual bars during the passage, which enables the desired cross-sectional reduction with minimal effort.
  • the bars are equipped with rows of rollers arranged one behind the other, offset from one bar to the next, there is an improvement in the friction in the reducing mold, and the offset rollers, which therefore have an overlapping effect, ensure proper strand deformation.
  • rollers In order to be able to adapt the rollers to different strand cross-sections and, above all, to the respective deformation profile, they are mounted in adjustable bearing blocks on the beams, whereby the height and inclination of the roller axes of rotation can be changed using these bearing blocks with the aid of spacers or the like .
  • the cooling and solidification process can be influenced during the passage of the strand through the second mold and, if necessary, matched to the deformation process.
  • a strand guide bridging this free space can be provided according to a further development of the invention, which preferably consists of two shell parts and has rollers and cooling slots or the like.
  • the strand leaving the moving mold is transferred safely and supported to the stationary mold by this strand guide, so that there are none There are faults and there can be no cracking of the strand shell.
  • the strand guide has a constant cross section, is preferably in two parts for assembly and maintenance and can be equipped with rollers and cooling slots or the like to improve the friction and cooling conditions.
  • a pair of transverse press rolls is arranged downstream of the second mold, which, by pressure welding, ensure a unification of the core parts which have solidified during the deformation and the compressed shell parts.
  • the continuous casting installation shown for the rational production of a flat strip is composed of a casting device 1, a first mold 2 and a downstream second mold 3, a strand guide 4 inserted between the molds, and a pair of press rolls 5 adjoining the second mold 3 together.
  • the casting device 1 consists of a reservoir 11 for receiving the steel melt S1 and a pouring tube 12, through which the melt S1 enters the mold cavity 21 of the first mold 2.
  • This first mold 2 is a moving plate mold made of a pair of opposing endlessly circulating plate chains 22 which delimit the mold cavity 21 which has a constant cross section.
  • the plate mold 2 is manufactured per se in a conventional design, the plates 23 of the two plate chains 22, which are assigned to one another in pairs, being angled and complementing one another in cross section to form a parallelogram.
  • the plates 23 are each in one piece and support one another with an edge web 24, which edge webs 24 abut against the plate inner walls delimiting the mold cavity 21 (FIG. 2).
  • the result is a simple, stable, functionally reliable and failure-prone plate mold which can be adjusted in width to a variety of cross-sectional sizes by a mutual transverse displacement of the plate chains 22.
  • the melt S1 is now cast in the first mold 2 to a strand S2 constant, approximately parallelogram-shaped cross section, which cools during its passage through this moving plate mold 2 until a solid shell S4, especially in the narrow side areas S3, has already solidified .
  • the mold cavity 21 is large enough to be able to penetrate with the pouring tube 12 to below the melt level in the mold cavity 21, and the moving mold 2 allows intensive contact between the strand and the mold for rapid heat dissipation, with the best possible friction conditions, so that high temperatures under proper casting conditions Pouring speed and the desired shell thicknesses can be achieved without difficulty by appropriate selection of the mold length at the given solidification speeds.
  • the strand guide 4 ensuring a functionally reliable and trouble-free transition of the strand from the first to the second mold.
  • the strand guide 4 is composed of two half shells 41, which limit a constant guide cross section corresponding to the outlet cross section of the mold 2.
  • rollers 42 can be inserted into the half-shells 41 and suitably distributed cooling slots 43 allow a corresponding heat dissipation and strand cooling.
  • the second mold 3 adjoining the strand guide 4 is a stationary mold and has a narrowing mold cavity 31.
  • there are two wall parts 32 each of which is divided into a plurality of longitudinal beams 33, each of which Longitudinal beam 33 is pivotally mounted about a transverse axis 34 located in the entry area and is pivotally supported by an actuator 35.
  • a mold cavity 31 is created, which changes from a parallelogram-shaped input cross-section (FIG. 6) corresponding to the guide cross-section of the strand guide 4 into a flat, plane-parallel output cross-section (FIG. 7), so that the strand S5 during its passage through the stationary one Mold 2, proceeding from a parallelogram cross section striding into a flat supporting strip S Vor is deformed and compressed.
  • the beams 33 are equipped with rollers 36 arranged in series, an offset of the rollers 36 from beam to beam having an overlapping mode of operation.
  • rollers 36 arranged in series, an offset of the rollers 36 from beam to beam having an overlapping mode of operation.
  • there are adjustable bearing blocks 37 so that a smooth transition from parallelogram to flat cross-section can be achieved.
  • nozzles 38 for applying a coolant are provided between the bars 33 and the rollers 36.
  • the reducing mold 3 need no longer have side boundary walls and it suffices for the limitation of the reducing mold cavity 31 by the opposite wall parts 32.
  • the flat compressed pre-strip S6 is then passed to the second mold 3 between press rolls 5, which ensure a compact structure of the pre-strip and ensure a secure connection of the pressed shell parts due to the press weld 5 achievable with these press rolls.
  • the preliminary strip S6 which leaves the continuous casting plant with a correspondingly thin cross section and sufficient speed, is deflected via guide and support rollers 6 and can be fed directly to a rolling mill 7, of course for the necessary control and straightening devices, control device or the like, not shown. to be concerned.
  • the reducing mold 3 is opened in order to avoid faults due to the first passage of the strand through the narrowing mold cavity 31. Only after the end of the strand has passed through the mold 3 is this activated by acting on the actuators 35 for the beams 33 until the desired cross-sectional reduction is achieved.
  • the beginning of the strand S7 is separated as start-up scrap from the preliminary strip S6 by means of appropriate cutting devices 8 before the preliminary strip is then or the like with a straightening punch 9. is fed to the deflection and support rollers 6 for proper withdrawal, so that the lack of cross-sectional reduction at the start of the casting is irrelevant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP89890028A 1988-02-01 1989-01-30 Procédé et installation de coulée continue d'acier Expired - Lifetime EP0329639B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0019388A AT392029B (de) 1988-02-01 1988-02-01 Stranggiessanlage zum stranggiessen von stahl
AT193/88 1988-02-01

Publications (2)

Publication Number Publication Date
EP0329639A1 true EP0329639A1 (fr) 1989-08-23
EP0329639B1 EP0329639B1 (fr) 1992-04-29

Family

ID=3483950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89890028A Expired - Lifetime EP0329639B1 (fr) 1988-02-01 1989-01-30 Procédé et installation de coulée continue d'acier

Country Status (5)

Country Link
US (1) US4953615A (fr)
EP (1) EP0329639B1 (fr)
JP (1) JP3018078B2 (fr)
AT (1) AT392029B (fr)
DE (1) DE58901253D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743116A1 (fr) * 1995-05-18 1996-11-20 DANIELI & C. OFFICINE MECCANICHE S.p.A. Installation de coulée continue verticale pour brames
WO2000050189A1 (fr) * 1999-02-26 2000-08-31 Giovanni Arvedi Procede de laminage par coulee continue en ligne pour plaques minces
WO2002090018A1 (fr) * 2001-05-07 2002-11-14 Anton Hulek Procede de coulee continue verticale d'un feuillard d'acier
WO2002040201A3 (fr) * 2000-11-16 2003-09-12 Sms Demag Ag Procede et dispositif de fabrication de brames minces
WO2011080065A1 (fr) * 2009-12-29 2011-07-07 Sms Siemag Ag Installation de coulée continue et procédé de coulée continue
WO2013000841A1 (fr) 2011-06-29 2013-01-03 Sms Siemag Ag Procédé de coulée continue d'une barre de coulée continue et installation de coulée continue

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT403020B (de) * 1995-02-01 1997-10-27 Hulek Anton Verfahren und stranggiessanlage zum herstellen von strangmaterial aus stahl
US5620045A (en) * 1995-04-24 1997-04-15 Gerding; Charles C. Continuous casting mold formed of plate elements
DE10009073A1 (de) * 1999-11-10 2001-05-17 Sms Demag Ag Kokille zum Stranggießen von Metall mit einem gekühlte Breitseitenwände und Schmalseitenwände aufweisenden, trichterförmig verjüngten Eingießbereich
DE10057876C1 (de) * 2000-11-21 2002-05-23 Georg Bollig Verfahren und Vorrichtung zur Herstellung von Warmband in einer Minihütte
DE10206243A1 (de) * 2002-02-15 2003-08-28 Sms Demag Ag Verfahren zum Endloswalzen eines im Querschnitt als Dünnbramme bemessenen, mit Gießgeschwindigkeit erzeugten Metallstrangs, insbesondere eines Stahlstrangs, und zugehörige Stranggießmaschine
DE10310357A1 (de) * 2003-03-10 2004-09-30 Siemens Ag Gießwalzanlage zur Erzeugen eines Stahlbandes
ITRM20050523A1 (it) * 2005-10-21 2007-04-22 Danieli Off Mecc Processo e impianto per la produzione di nastro metallico.
ITRM20070150A1 (it) * 2007-03-21 2008-09-22 Danieli Off Mecc Processo e impianto per la produzione di nastro metallico
CN104021861B (zh) * 2014-06-26 2016-04-13 国网山东省电力公司莱西市供电公司 一种改进结构的钢带及使用该钢带的电缆
CN106734202A (zh) * 2016-12-27 2017-05-31 中冶连铸技术工程有限责任公司 棒线材和窄带轧制生产线及其生产方法

Citations (4)

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Publication number Priority date Publication date Assignee Title
US3147521A (en) * 1961-08-10 1964-09-08 Boehm Arnold Henry Continuous casting and forming process
US3292217A (en) * 1961-08-10 1966-12-20 Arnold H Boehm Continuous casting and forming process
GB1199805A (en) * 1967-04-20 1970-07-22 British Iron Steel Research Continuous Casting
WO1987000099A1 (fr) * 1985-06-25 1987-01-15 Clecim Procede et machine de coulee continue d'un produit metallique mince

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DE1220973B (de) * 1961-02-18 1966-07-14 Ulrich Ploeger Dipl Ing Verfahren zum Stranggiessen lunkerfreier Knueppel, Brammen und aehnlicher Abmessungen
DE1583620A1 (de) * 1967-12-15 1970-08-27 Demag Ag Verfahren und Vorrichtung zum Behandeln von Giessstraengen durch Walzen
CH477243A (de) * 1968-03-01 1969-08-31 Olsson Ag Erik Verfahren zur Abstützung eines Giesstranges
AT276657B (de) * 1968-04-01 1969-11-25 Ural Zd Tyazhelogo Mash Im S O Vorrichtung zum Ausziehen des Stranges aus der Kokille einer Senkrechtstranggußanlage für Metall
US4519439A (en) * 1977-07-26 1985-05-28 Jernjontoret Method of preventing formation of segregations during continuous casting
AT381878B (de) * 1984-09-10 1986-12-10 Voest Alpine Ag Stranggiesskokille
US4716955A (en) * 1986-06-11 1988-01-05 Sms Concast Inc. Continuous casting method
DE3627991A1 (de) * 1986-08-18 1988-02-25 Mannesmann Ag Verfahren zum stranggiessen von brammen und einrichtung zur durchfuehrung des verfahrens
DE3640525C2 (de) * 1986-11-27 1996-02-15 Schloemann Siemag Ag Kokille zum Stranggießen von Stahlband
EP1920023A4 (fr) 2005-05-31 2009-08-19 Xerocoat Inc Controle de la morphologie de films de silice
JP5528778B2 (ja) 2009-11-17 2014-06-25 矢崎総業株式会社 シール構造

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3147521A (en) * 1961-08-10 1964-09-08 Boehm Arnold Henry Continuous casting and forming process
US3292217A (en) * 1961-08-10 1966-12-20 Arnold H Boehm Continuous casting and forming process
GB1199805A (en) * 1967-04-20 1970-07-22 British Iron Steel Research Continuous Casting
WO1987000099A1 (fr) * 1985-06-25 1987-01-15 Clecim Procede et machine de coulee continue d'un produit metallique mince

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 8, Nr. 90 (M-292)[1527], 25. April 1984; & JP-A-59 007 464 (KAWASAKI SEITETSU K.K.) 14-01-1984 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0743116A1 (fr) * 1995-05-18 1996-11-20 DANIELI & C. OFFICINE MECCANICHE S.p.A. Installation de coulée continue verticale pour brames
US5803155A (en) * 1995-05-18 1998-09-08 Danieli & C. Officine Meccaniche Spa Casting line for slabs
WO2000050189A1 (fr) * 1999-02-26 2000-08-31 Giovanni Arvedi Procede de laminage par coulee continue en ligne pour plaques minces
KR100819123B1 (ko) * 2000-11-16 2008-04-02 에스엠에스 데마그 악티엔게젤샤프트 박 슬래브 제조 방법 및 장치
US7069974B2 (en) 2000-11-16 2006-07-04 Sms Demag Ag Method and device for producing thin slabs
WO2002040201A3 (fr) * 2000-11-16 2003-09-12 Sms Demag Ag Procede et dispositif de fabrication de brames minces
US6945311B2 (en) 2001-05-07 2005-09-20 Anton Hulek Method for the vertical continuous casting of a steel strip
AT410522B (de) * 2001-05-07 2003-05-26 Hulek Anton Verfahren und stranggiessanlage zum vertikalen stranggiessen eines stahlbandes
WO2002090018A1 (fr) * 2001-05-07 2002-11-14 Anton Hulek Procede de coulee continue verticale d'un feuillard d'acier
KR100907570B1 (ko) * 2001-05-07 2009-07-14 후렉 안톤 스틸 밴드의 수직 연속 주조 방법
WO2011080065A1 (fr) * 2009-12-29 2011-07-07 Sms Siemag Ag Installation de coulée continue et procédé de coulée continue
WO2013000841A1 (fr) 2011-06-29 2013-01-03 Sms Siemag Ag Procédé de coulée continue d'une barre de coulée continue et installation de coulée continue
DE102011078370A1 (de) 2011-06-29 2013-01-03 Sms Siemag Ag Verfahren zum Stranggießen eines Gießstrangs und Stranggießanlage

Also Published As

Publication number Publication date
EP0329639B1 (fr) 1992-04-29
AT392029B (de) 1991-01-10
ATA19388A (de) 1990-07-15
JPH01237059A (ja) 1989-09-21
DE58901253D1 (de) 1992-06-04
US4953615A (en) 1990-09-04
JP3018078B2 (ja) 2000-03-13

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