EP0286862B1 - Procédé pour fabriquer une bande d'acier - Google Patents

Procédé pour fabriquer une bande d'acier Download PDF

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Publication number
EP0286862B1
EP0286862B1 EP88104297A EP88104297A EP0286862B1 EP 0286862 B1 EP0286862 B1 EP 0286862B1 EP 88104297 A EP88104297 A EP 88104297A EP 88104297 A EP88104297 A EP 88104297A EP 0286862 B1 EP0286862 B1 EP 0286862B1
Authority
EP
European Patent Office
Prior art keywords
thickness
steel strand
strand
process according
strip
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.)
Expired - Lifetime
Application number
EP88104297A
Other languages
German (de)
English (en)
Other versions
EP0286862A1 (fr
Inventor
Erich Dr.-Ing. Höffken
Hermann Dipl.-Ing. Lax
Günter Dipl.-Ing. Pietzko
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.)
Thyssen Stahl AG
Original Assignee
Thyssen Stahl 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25854629&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0286862(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19873712537 external-priority patent/DE3712537A1/de
Application filed by Thyssen Stahl AG filed Critical Thyssen Stahl AG
Priority to AT88104297T priority Critical patent/ATE75977T1/de
Publication of EP0286862A1 publication Critical patent/EP0286862A1/fr
Application granted granted Critical
Publication of EP0286862B1 publication Critical patent/EP0286862B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/04—Thickness, gauge

Definitions

  • the invention relates to a method for producing a steel strip with a thickness of at least 2 mm by deforming a steel strand with a liquid core cast in a continuous mold, the steel strand in a funnel-shaped oscillating continuous mold with a casting speed of 5-20 m / min. cast to a thickness of 40 - 50 mm and then rolled out of the casting heat.
  • the processes used in practice for the production of hot-rolled steel strip are generally based on a continuous cast slab, which, after it has completely solidified, is heated again to the rolling temperature and reduced in thickness in several passes and rolled out to form the strip. Because of the considerable thickness of the slabs used, up to nine roll stands are required for this. Plants for the application of such a method entail high investment costs because, on the one hand, the plants require a correspondingly large continuous casting plant, on the other hand, they require a multi-stand hot strip mill, the roughing stands of which have to be correspondingly compact due to the thickness of the slabs to be rolled out.
  • This object is achieved in the generic method according to the invention in that the steel strand emerging from the continuous mold, which has not yet solidified, is compressed in such a way that the steel strand is welded to a thickness of less than 25 mm, in particular 10 to 20, by welding the inner walls of the strand shell which has already solidified mm, is reduced in thickness.
  • the reduced-thickness strand is preferably rolled into a strip in at least one pass with a degree of deformation of 5 to 85%, the reduction in cross section causing stretching. It has proven to be advantageous if the reduced-thickness strand is cooled to a temperature in the range from 1000 to 1200 ° C. by spraying a cooling medium onto the strand surface before rolling.
  • the various parameters for casting the steel strand on the one hand and for rolling out the compressed steel strand on the other hand are coordinated with one another in such a way that the strand shells are sufficiently resistant to both compress the steel strand without breakthroughs and also utilize the casting heat to obtain the desired, possibly high degree of deformation to be able to withstand when rolling to the final dimension (for example to a desired minimum thickness of about 2 mm).
  • the use of the method according to the invention for the production of steel strips is inexpensive, since the production method does not require large plants with holding furnaces and many roll stands with the corresponding energy requirements.
  • the steel strand should be given a profile corresponding to the thickness profile of the finished strip when compressed. This measure is important for the method according to the invention, because basic profile changes are not possible in a simple manner when a strip is rolled out.
  • the cast steel strand has a rectangular cross-sectional shape with convexly rounded narrow sides or an oval cross-sectional shape. This shape ensures that a strand shell with a uniform thickness is formed during solidification, so that when pressed together of the steel strand after it emerges from the mold in the forming device, neither cracks in the edge region nor irregularities on the surface of the strand occur.
  • the casting speed v g and / or the cooling intensity of the mold is controlled in such a way that the cast steel strand has a strand shell with a thickness of 5 to 10 mm when it emerges from the mold.
  • the cooling effective length 1 k (m) of the mold is dimensioned such that the condition 0.05.
  • v g (m / min) less than or equal to 1 k less than or equal to 1 m is satisfied, the value 0.05 being a dimensionally dependent component. Under this condition, the solidifying strand is on average sufficient heat, for example withdrawn.
  • the cooling should be so intensive that the inner surface temperature of the mold remains below 400 ° C, in particular between 200 and 400 ° C. In this case it is ensured that a sufficiently thick steel strand is obtained for further processing even after the cast steel strand has been compressed.
  • a strand shell of the mentioned thickness is also resistant enough to withstand the forces occurring in the material when the cast strand is compressed without the formation of cracks.
  • the cast steel strand is reduced in thickness by up to 75% immediately after it leaves the mold.
  • a larger reduction in the strand thickness at this point should be avoided, because otherwise when pulling out the Strands from the deformation device such large tensile forces must be applied that there may be cracks in the strand surface, which can not be welded again with subsequent further deformation of the strand.
  • steel strands When the not yet solidified steel strand of 40 to 50 mm is compressed, steel strands are obtained which have a thickness of 10 to 20 mm. Such thin strips can already be used for some applications, without the need for substantial deformation during rolling. A degree of deformation of about 5% to improve the surface quality (skin pass) can be sufficient. After appropriate cooling, the strips, which are still slightly deformed in this way, can be coiled.
  • a deformation device 3 by means of which the strand is compressed to a thickness of less than 25 mm, in particular 10-20 mm.
  • the deformation device consists, for example, of cooled plates which continue the broad sides of the mold 2 or a corresponding arrangement of driven pull-out rollers 3a which can be adjusted relative to one another by means of hydraulic cylinders 3b for compressing the cast strand 10.
  • support rollers determining the profile should be assigned to the narrow sides.
  • the diameter d of the pull-out rollers 3a should be between 0.5 m and 1 m, while the distance D of the beginning of the area of attack from the lower edge of the mold 2 should be less than 0.5 m. If a strip profile with elevation, for example in the middle of the strip, is required for further processing, the bales of the pull-out rollers can have a corresponding contour. A strip with such a profile promotes further processing, for example in a cold rolling mill. However, pull-out rollers with a different profile, for example those with bottle-shaped bales, can also be used.
  • the pull-out rollers 3a are followed by a cooling device 4, which can consist of ribbed or lattice-shaped cooled plates 4a.
  • a cooling device which can consist of ribbed or lattice-shaped cooled plates 4a.
  • cooling liquid is sprayed from nozzles 4b between the rods or grids of the plates 4a onto the solidifying strand shell.
  • the cooling device 4 is immediately followed by at least one roll stand 5 which rolls out the cast strand 13.
  • the thickness of the compressed strand is reduced by 5-85%, that is, in the case of a 10 mm strand, the thickness is reduced to a minimum thickness of about 2 mm using the casting heat.
  • a thickness measuring device 12 is arranged behind the first roll stand 5 and determines the thickness profile of the rolled strand 10a over its entire width.
  • the cooling device 4 arranged in front of the roll stand 5 is controlled as a function of the thickness profile determined at this point.
  • deflection rollers 6, a further roll stand 7, a further cooling device 8, a pair of scissors 9 and a reel 11 can be provided for winding up the rolled strip 10b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
  • Coating With Molten Metal (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Belt Conveyors (AREA)
  • Ropes Or Cables (AREA)

Claims (9)

  1. Procédé pour la fabrication d'un feuillard d'acier ayant une épaisseur d'au moins 2 mm par déformation d'une barre d'acier à noyau liquide coulée dans une lingotière de coulée continue, la barre d'acier étant coulée dans une lingotière de coulée continue oscillante en forme d'entonnoir à une vitesse de coulée de 5 - 20 m/mn à une épaisseur de 40 - 50 mm et ensuite laminée hors de la chaude de coulée,
    caractérisé en ce que la barre d'acier non encore totalement durcie sortant de la lingotière est comprimée de telle manière que, avec un soudage des parois internes de la croûte déjà durcie, la barre d'acier soit réduite en épaisseur à une épaisseur inférieure à 25 mm, en particulier de 10 à 20 mm.
  2. Procédé selon la revendication 1,
    caractérisé en ce que la barre de coulée réduite en épaisseur est laminée sous forme d'un feuillard en au moins une passe a un taux de déformation de 5 à 85 %.
  3. Procédé selon la revendication 2,
    caractérisé en ce que la barre d'acier réduite en épaisseur est refroidie avant le laminage à une température dans la plage de 1 000 à 1 200 °C par aspersion d'un agent de refroidissement sur la surface de la barre.
  4. Procédé selon la revendication 3,
    caractérisé en ce que la barre d'acier reçoit lors de la compression un profil correspondant au profil d'épaisseur du feuillard fini.
  5. Procédé selon l'une des revendications 1 à 4,
    caractérisé en ce qu'on coule une barre d'acier avec une forme rectangulaire en section transversale avec des petites faces arrondies convexes ou une forme ovale en section transversale.
  6. Procédé selon la revendication 5,
    caractérisé en ce que la vitesse de coulée et/ou l'intensité de refroidissement de la lingotière sont réglées de telle manière que la barre d'acier coulée présente à la sortie de la lingotière une croûte solidifiée d'une épaisseur de 5 à 10
  7. Procédé selon l'une des revendications 1 à 6,
    caractérisé en ce que la coulée a lieu avec une longueur de lingotière 1k active pour le refroidissement qui satisfait la relation 1m supérieur/égal 1k supérieur/égal 0,05 Vg avec Vg (m/mn) représentant la vitesse de coulée.
  8. Procédé selon l'une des revendications 1 à 7,
    caractérisé en ce que la barre d'acier est réduite en épaisseur de jusqu'à 75 % directement après la sortie de la lingotière.
  9. Procédé selon l'une des revendications 1 à 8,
    caractérisé en ce qu on mesure derrière la première cage de laminage le profil d'épaisseur du feuillard, on compare la valeur mesurée à un profil de consigne et on rajuste, dans le cas d'un écart entre profils instantané et de consigne, l'amenée d'agent de refroidissement à des buses d'agent de refroidissement disposées avant la cage de laminage.
EP88104297A 1987-04-13 1988-03-18 Procédé pour fabriquer une bande d'acier Expired - Lifetime EP0286862B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88104297T ATE75977T1 (de) 1987-04-13 1988-03-18 Verfahren zum herstellen eines stahlbandes.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3712537 1987-04-13
DE19873712537 DE3712537A1 (de) 1987-04-13 1987-04-13 Verfahren zum herstellen eines stahlbandes
DE3723543 1987-07-16
DE3723543 1987-07-16

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP89104899.3 Division-Into 1989-03-18

Publications (2)

Publication Number Publication Date
EP0286862A1 EP0286862A1 (fr) 1988-10-19
EP0286862B1 true EP0286862B1 (fr) 1992-05-13

Family

ID=25854629

Family Applications (2)

Application Number Title Priority Date Filing Date
EP88104297A Expired - Lifetime EP0286862B1 (fr) 1987-04-13 1988-03-18 Procédé pour fabriquer une bande d'acier
EP89104899A Expired - Lifetime EP0326190B1 (fr) 1987-04-13 1988-03-18 Installation pour fabriquer un feuillard d'acier ayant une épaisseur située entre 2 et 25 mm

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP89104899A Expired - Lifetime EP0326190B1 (fr) 1987-04-13 1988-03-18 Installation pour fabriquer un feuillard d'acier ayant une épaisseur située entre 2 et 25 mm

Country Status (8)

Country Link
US (2) US4951734A (fr)
EP (2) EP0286862B1 (fr)
JP (1) JP2738934B2 (fr)
AT (2) ATE75977T1 (fr)
BR (1) BR8801733A (fr)
CA (1) CA1311904C (fr)
DE (2) DE3871125D1 (fr)
ES (2) ES2031945T3 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0344095A2 (fr) * 1988-05-25 1989-11-29 MANNESMANN Aktiengesellschaft Procédé de laminage direct continu
WO1990000456A1 (fr) * 1988-07-14 1990-01-25 Thyssen-Stahl Aktiengesellschaft Procede de fabrication de feuillards d'acier de moins de 10 mm d'epaisseur
EP0384151A1 (fr) * 1989-02-18 1990-08-29 Sms Schloemann-Siemag Aktiengesellschaft Installation pour la fabrication de feuillard
AU620419B2 (en) * 1988-07-14 1992-02-20 Thyssen Stahl Aktiengesellschaft Method of producing a steel strip having a thickness of less than 10 mm
EP0535368A1 (fr) * 1991-09-19 1993-04-07 Sms Schloemann-Siemag Aktiengesellschaft Procédé et dispositif de coulée continue d'un lingot métallique
EP0611610A1 (fr) * 1993-02-16 1994-08-24 Voest-Alpine Industrieanlagenbau Gmbh Procédé pour la production d'un feuillard, d'un feuillard ébauché ou d'une brame
US5479982A (en) * 1992-12-23 1996-01-02 Thyssen Stahl Aktiengesellschaft Method for the production of a steel strip by the casting of a strand followed by rolling
DE19745445C1 (de) * 1997-10-15 1999-07-08 Thyssenkrupp Stahl Ag Verfahren zur Herstellung von kornorientiertem Elektroblech mit geringem Ummagnetisierungsverlust und hoher Polarisation
US6533024B2 (en) 1999-12-15 2003-03-18 Sms Demag Ag Method for change of section of a billet below a casting die of a continuous casting plant
US7909085B2 (en) 2005-10-21 2011-03-22 Danieli & C. Officine Meccaniche S.P.A. Process and plant for producing metal strip

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BRPI0513754B1 (pt) * 2005-04-07 2018-10-23 Arvedi Giovanni processo para fabricar tiras de metal de espessura, e, usina para fabricar tiras de metal
CN100438997C (zh) * 2005-05-20 2008-12-03 中冶东方工程技术有限公司 紧凑型中宽带钢生产工艺
CN100396391C (zh) * 2005-09-01 2008-06-25 中冶东方工程技术有限公司 薄带钢铸轧生产工艺
ITMI20051764A1 (it) * 2005-09-22 2007-03-23 Danieli Off Mecc Processo e impianto per la produzione di nastro metallico
DE102006054932A1 (de) 2005-12-16 2007-09-13 Sms Demag Ag Verfahren und Vorrichtung zum Herstellen eines Metallbandes durch Gießwalzen
US20070199627A1 (en) * 2006-02-27 2007-08-30 Blejde Walter N Low surface roughness cast strip and method and apparatus for making the same
US8562766B2 (en) 2006-02-27 2013-10-22 Nucor Corporation Method for making a low surface roughness cast strip
ITRM20070150A1 (it) * 2007-03-21 2008-09-22 Danieli Off Mecc Processo e impianto per la produzione di nastro metallico
DE102008020412A1 (de) 2007-08-24 2009-02-26 Sms Demag Ag Verfahren und Vorrichtung zum Herstellen eines Metallbandes durch Gießwalzen
DE102008003222A1 (de) * 2007-09-13 2009-03-19 Sms Demag Ag Kompakte flexible CSP-Anlage für Endlos-, Semi-Endlos- und Batchbetrieb
CN101596546B (zh) * 2009-07-02 2013-04-17 盐城市联鑫钢铁有限公司 一种应用在钢铁生产中的轧钢生产工艺
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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0344095A3 (fr) * 1988-05-25 1991-03-06 MANNESMANN Aktiengesellschaft Procédé de laminage direct continu
EP0344095A2 (fr) * 1988-05-25 1989-11-29 MANNESMANN Aktiengesellschaft Procédé de laminage direct continu
WO1990000456A1 (fr) * 1988-07-14 1990-01-25 Thyssen-Stahl Aktiengesellschaft Procede de fabrication de feuillards d'acier de moins de 10 mm d'epaisseur
EP0353402A1 (fr) * 1988-07-14 1990-02-07 Thyssen Stahl Aktiengesellschaft Procédé de production d'une bande d'acier ayant une épaisseur de moins de 10 mm
AU620419B2 (en) * 1988-07-14 1992-02-20 Thyssen Stahl Aktiengesellschaft Method of producing a steel strip having a thickness of less than 10 mm
EP0384151A1 (fr) * 1989-02-18 1990-08-29 Sms Schloemann-Siemag Aktiengesellschaft Installation pour la fabrication de feuillard
EP0535368A1 (fr) * 1991-09-19 1993-04-07 Sms Schloemann-Siemag Aktiengesellschaft Procédé et dispositif de coulée continue d'un lingot métallique
US5339887A (en) * 1991-09-19 1994-08-23 Sms Schloemann-Siemag Aktiengesellschaft Process for production of steel strip
US5479982A (en) * 1992-12-23 1996-01-02 Thyssen Stahl Aktiengesellschaft Method for the production of a steel strip by the casting of a strand followed by rolling
EP0611610A1 (fr) * 1993-02-16 1994-08-24 Voest-Alpine Industrieanlagenbau Gmbh Procédé pour la production d'un feuillard, d'un feuillard ébauché ou d'une brame
EP0853987A2 (fr) * 1993-02-16 1998-07-22 VOEST-ALPINE Industrieanlagenbau GmbH Installation pour la production d'un feuillard, d'un feullard ébaucheé ou d'une bramme
EP0853987A3 (fr) * 1993-02-16 1998-08-19 VOEST-ALPINE Industrieanlagenbau GmbH Installation pour la production d'un feuillard, d'un feullard ébaucheé ou d'une bramme
US5810069A (en) * 1993-02-16 1998-09-22 Voest-Alpine Industrieanlagen Gmbh Process for the production of a strip, a pre-strip or a slab
DE19745445C1 (de) * 1997-10-15 1999-07-08 Thyssenkrupp Stahl Ag Verfahren zur Herstellung von kornorientiertem Elektroblech mit geringem Ummagnetisierungsverlust und hoher Polarisation
US6533024B2 (en) 1999-12-15 2003-03-18 Sms Demag Ag Method for change of section of a billet below a casting die of a continuous casting plant
US7909085B2 (en) 2005-10-21 2011-03-22 Danieli & C. Officine Meccaniche S.P.A. Process and plant for producing metal strip

Also Published As

Publication number Publication date
ES2032620T3 (es) 1993-02-16
DE3871125D1 (de) 1992-06-17
ATE75977T1 (de) 1992-05-15
EP0286862A1 (fr) 1988-10-19
BR8801733A (pt) 1988-11-16
EP0326190A2 (fr) 1989-08-02
ES2031945T3 (es) 1993-01-01
EP0326190B1 (fr) 1992-05-13
EP0326190A3 (en) 1989-11-08
ATE75978T1 (de) 1992-05-15
JPS63264250A (ja) 1988-11-01
JP2738934B2 (ja) 1998-04-08
US5058656A (en) 1991-10-22
CA1311904C (fr) 1992-12-29
US4951734A (en) 1990-08-28
DE3870970D1 (de) 1992-06-17

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