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EP1385656B1 - Procede pour la coulee continue de blocs, de brames ou de brames minces - Google Patents

Procede pour la coulee continue de blocs, de brames ou de brames minces Download PDF

Info

Publication number
EP1385656B1
EP1385656B1 EP02769128A EP02769128A EP1385656B1 EP 1385656 B1 EP1385656 B1 EP 1385656B1 EP 02769128 A EP02769128 A EP 02769128A EP 02769128 A EP02769128 A EP 02769128A EP 1385656 B1 EP1385656 B1 EP 1385656B1
Authority
EP
European Patent Office
Prior art keywords
path
casting
format
reduction
thickness reduction
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
EP02769128A
Other languages
German (de)
English (en)
Other versions
EP1385656A1 (fr
Inventor
Hans Streubel
Axel Weyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Demag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1385656A1 publication Critical patent/EP1385656A1/fr
Application granted granted Critical
Publication of EP1385656B1 publication Critical patent/EP1385656B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • 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

Definitions

  • the invention relates to a method for the continuous casting of blocks, slabs or thin slabs in a continuous casting, the below a mold in mutually adjustable strand guide segments having acted example of weg- or position-controlled hydraulic cylinders roller pairs, wherein the casting strand by conically hiring at least one of its strand guide segments is reduced in thickness up to the sump tip soft reduction distance in the thickness and is subjected in the region of its liquid core between the mold and the soft reduction path (SR route) by at least one pair of rollers of a format thickness reduction.
  • SR route soft reduction path
  • the soft reduction process In continuous casting plants for slabs, the soft reduction process (SR process) is used to reduce core porosity and core segregation.
  • the soft reduction is preferably carried out in the straightener area.
  • Prerequisite for an improvement in the internal structural quality is that the final solidification of the strand in the conically employed soft reduction (SR route) takes place.
  • a final solidification in front of or behind the SR line not only leads to no improvement in the interior quality, but occasionally to a deterioration.
  • the conical roller adjustment of the strand guide segments is carried out either by a fixed setting by means of hydraulic cylinders and spacers, or by means of flexible employment, for example via position-controlled hydraulic cylinder.
  • the so-called operating window of the continuous casting plant for example the adaptation of the casting speed and other casting parameters, the intensity of the spray cooling or the steel quality, is predetermined by the number of SR roller pairs and the type of employment. As the number of reels increases, the operating window can be increased. However, this increase is out of all proportion to the extra costs this entails. Furthermore, influencing the sump tip position by the spray cooling is only possible to a limited extent.
  • the strand passes through a soft-reduction route, at the entrance he is not solidified, but at the end he should be solidified, what u. a. the casting speed is an essential operating parameter.
  • a reduction in thickness for example for thin slabs, between 0.5 and 3 mm per meter of casting length is carried out.
  • the pairs of rolls of individual segments beyond the shrinkage behavior of the strand are set narrower in the soft reduction section, in order to achieve an improvement in the strand internal quality in the region of the solidification by structural compaction.
  • EP 0 834 364 A1 describes a method and an apparatus for high-speed continuous casting plants with a strand thickness reduction during solidification, wherein after the so-called casting rolling the strand cross section is reduced linearly over a minimum length of the strand guide immediately under the mold, with subsequent further strand production on the Remaining strand guide, the "soft reduction", until just before the final solidification or sump tip.
  • the strand cross-section reduction is set so that a critical deformation of the strand shell, taking into account the high casting speed and steel grade is not exceeded.
  • EP 0 177 796 B1 discloses a method for guiding and straightening a cast strand in the straightening and outfeed area of a continuous sheet casting plant, wherein oppositely arranged rolls are held by a spring force against the ferrostatic pressure of the cast strand in a distance which can be adapted to the casting process.
  • a G umanstrang Scheme increased strength is tracked and reduced in its passage between opposite rollers, the respective spring force by a small drag.
  • the slabs or blocks produced in continuous casting plants according to the aforementioned documents serve as starting material for rolling mill products for producing sheet metal or strip.
  • the invention has for its object to achieve an adaptation or enlargement of the operating window of a continuous casting to changing casting parameters and to obtain a comparatively constant optimal structure in the cast by influencing the silt peak location.
  • the format thickness is reduced in such a way that the position of the sump tip in the SR section is kept practically constant. This is in a large casting speed range with low mechanical engineering Expense ensures a consistently good quality of the cast strand.
  • the process ausgestaltend is provided that arrangement and / or employment of the roller pairs for the format thickness reduction in the region of the liquid core of the cast strand are determined in accordance with the G confusequerrough or format cross section of the cast strand.
  • the method according to the invention provides that the thickness reduction is carried out immediately before the SR section.
  • FIG. 1 shows a purely schematic representation of a strand guide below a mold with a configuration according to the invention and with a soft reduction path SR.
  • the sketch-like representation of the strand 5 below the melt inlet 6 in the mold 1 shows a first approach of a forming strand shell.
  • the strand 5 is subjected to a size reduction in the region of its liquid core 7 between the mold 1 and the soft reduction section SR by at least one pair of rollers 4, 4 '.
  • the reduction in size by the pairs of rollers 4, 4 ' is followed by a strand guide segment 2.2 for parallel strand guidance of the cast strand 5.
  • the pairs of rollers 4, 4' are each acted upon by displacement or position-controlled, not shown in detail hydraulic cylinders, so that they the hydrostatic pressures of the melt. 8 overcome and thereby a local format reduction or thickness reduction in the strand 5 z. B. 10 mm / m in the casting direction before the soft reduction path SR with a thickness reduction of, for example, 1 mm / m cause.
  • another strand guide segment 2.3 for parallel strand guidance is arranged.
  • the format dimension is always adjusted so that the sump tip 9 largely independent of the aforementioned G discernparametern in a section of the SR track is, to the required Improvements in the internal quality of the cast strand leads.
  • the format thickness is reduced so that the position of the sump tip 9 is kept practically constant in the SR route. This ensures a consistently good internal quality of the cast product in a large casting speed range with low mechanical complexity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Silicon Compounds (AREA)

Claims (5)

  1. Procédé pour la coulée continue de blocs, de brames ou de brames minces dans une installation de coulée continue, qui présente, en dessous d'une coquille (1), des éléments de guidage continu (2.1 à 2.n) réglables à une distance réciproque comportant par exemple des paires de rouleaux (4,4') qui sont sollicités par des cylindres hydrauliques réglables à une position, respectivement une marche, dans lequel l'épaisseur de la coulée continue (5) est réduite lors de la formation d'une croûte solidifiée (8) par l'approche conique d'au moins un de ses éléments de guidage continu (2.1 à 2.n) sur une portion de réduction douce (Portion SR-Soft Reduction) allant jusqu'au puits liquide (9) et le coulage continu est soumis au niveau de son noyau liquide (7) entre la coquille (1) et la portion de réduction douce (Portion SR) à une réduction d'épaisseur de format par au moins une paire de rouleaux (4,4'),
    caractérisé en ce que,
    la quantité de paires de rouleaux (4,4') et leur approche réciproque plus ou moins étroite au niveau du noyau liquide (7) de la coulée continue (5) permet une adaptation flexible du processus de coulée à la vitesse de coulée et ainsi la réduction de l'épaisseur de format de la coulée continue (5) comportant un noyau (7) liquide est réglée de telle sorte que, indépendamment de la qualité de l'acier, l'intensité du refroidissement de l'injection et la vitesse de coulée, la position du puits liquide (9) dans la portion SR soit maintenue approximativement constante.
  2. Procédé selon la revendication 1,
    caractérisé en ce que,
    l'agencement et/ou l'approche des paires de rouleaux (4,4') pour la réduction de l'épaisseur de format au niveau du noyau (7) liquide de la coulée continue (5) est déterminé en fonction des dimensions de la section transversale de la coulée, respectivement de la section transversale du format de la coulée continue.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que,
    la réduction de l'épaisseur de format est entreprise directement avant la portion SR.
  4. Procédé selon une ou plusieurs des revendications 1 à 3,
    caractérisé en ce que,
    les rouleaux (4) pour réduire l'épaisseur de format de la coulée continue (5) sont approchés de la portion SR à une position réglée.
  5. Procédé selon une ou plusieurs des revendications 1 à 4,
    caractérisé en ce que,
    les rouleaux (4) pour réduire l'épaisseur de format de la coulée continue (5) sont approchés au niveau du noyau liquide (7) de cette dernière à une position réglée.
EP02769128A 2001-05-07 2002-05-02 Procede pour la coulee continue de blocs, de brames ou de brames minces Expired - Lifetime EP1385656B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10122118 2001-05-07
DE10122118A DE10122118A1 (de) 2001-05-07 2001-05-07 Verfahren und Vorrichtung zum Stranggiessen von Blöcken, Brammen und Dünnbrammen
PCT/EP2002/004801 WO2002090019A1 (fr) 2001-05-07 2002-05-02 Procede et dispositif permettant la coulee continue de blocs, de brames ou de brames minces

Publications (2)

Publication Number Publication Date
EP1385656A1 EP1385656A1 (fr) 2004-02-04
EP1385656B1 true EP1385656B1 (fr) 2004-12-29

Family

ID=7683887

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02769128A Expired - Lifetime EP1385656B1 (fr) 2001-05-07 2002-05-02 Procede pour la coulee continue de blocs, de brames ou de brames minces

Country Status (11)

Country Link
US (1) US7025118B2 (fr)
EP (1) EP1385656B1 (fr)
JP (1) JP4846969B2 (fr)
KR (1) KR100851899B1 (fr)
CN (1) CN1287932C (fr)
AT (1) ATE285861T1 (fr)
CA (1) CA2446222C (fr)
DE (2) DE10122118A1 (fr)
ES (1) ES2233864T3 (fr)
RU (1) RU2287401C2 (fr)
WO (1) WO2002090019A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004002783A1 (de) * 2004-01-20 2005-08-04 Sms Demag Ag Verfahren und Einrichtung zum Bestimmen der Lage der Sumpfspitze im Gießstrang beim Stranggießen von flüssigen Metallen, insbesondere von flüssigen Stahlwerkstoffen
EP2543454B1 (fr) * 2011-07-08 2019-09-04 Primetals Technologies Germany GmbH Procédé et appareil pour la fabrication de produits longs en acier par coulée continue
RU2494834C1 (ru) * 2012-06-27 2013-10-10 Открытое акционерное общество "Магнитогорский металлургический комбинат" Способ непрерывного литья заготовок
EP3219408B1 (fr) * 2014-12-24 2018-11-07 JFE Steel Corporation Procédé de coulée continue pour de l'acier
BR102015009492B1 (pt) * 2015-01-30 2021-05-04 Jfe Steel Corporation método de lingotamento contínuo de aço
DE102017219464A1 (de) * 2017-10-30 2019-05-02 Sms Group Gmbh Stranggießanlage mit Einzelrollenanstellung
CN109465415A (zh) * 2018-12-07 2019-03-15 东北大学 一种连铸凝固末端双单点重压下扇形段辊列结构

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4138740A1 (de) * 1991-11-26 1993-05-27 Schloemann Siemag Ag Verfahren und vorrichtung zum stranggiessen von brammen oder bloecken
AT401744B (de) * 1993-10-14 1996-11-25 Voest Alpine Ind Anlagen Verfahren und anlage zum stranggiessen
JP3008821B2 (ja) * 1994-07-29 2000-02-14 住友金属工業株式会社 薄鋳片の連続鋳造方法および装置
EP0804981B1 (fr) * 1995-10-18 2001-09-26 Sumitomo Metal Industries, Ltd. Procede de coulage continu et appareil s'y rapportant
DE19639297C2 (de) * 1996-09-25 2000-02-03 Schloemann Siemag Ag Verfahren und Vorrichtung für Hochgeschwindigkeits-Stranggießanlagen mit einer Strangdickenreduktion während der Erstarrung
DE19720768C1 (de) * 1997-05-07 1999-01-14 Mannesmann Ag Verfahren und Vorrichtung zum Erzeugen von Brammen aus Stahl
DE19903928A1 (de) * 1998-11-06 2000-05-11 Schloemann Siemag Ag Verfahren und Anlage zum Herstellen von Stahlband
DE19933635A1 (de) * 1999-07-17 2001-01-18 Sms Demag Ag Verfahren und Vorrichtung zur Formatdickenänderung des Gußstranges einer Stranggießanlage im kontinuierlichen Gießbetrieb
DE10011689A1 (de) * 2000-03-10 2001-09-13 Sms Demag Ag Verfahren zum Stranggiessen von Brammen und insbesondere von Dünnbrammen

Also Published As

Publication number Publication date
ATE285861T1 (de) 2005-01-15
WO2002090019A1 (fr) 2002-11-14
KR20030090778A (ko) 2003-11-28
ES2233864T3 (es) 2005-06-16
US7025118B2 (en) 2006-04-11
KR100851899B1 (ko) 2008-08-13
DE50201906D1 (de) 2005-02-03
CA2446222C (fr) 2009-07-14
RU2287401C2 (ru) 2006-11-20
CA2446222A1 (fr) 2002-11-14
US20040129405A1 (en) 2004-07-08
RU2003135621A (ru) 2005-05-27
CN1287932C (zh) 2006-12-06
DE10122118A1 (de) 2002-11-14
EP1385656A1 (fr) 2004-02-04
JP2004528987A (ja) 2004-09-24
CN1529643A (zh) 2004-09-15
JP4846969B2 (ja) 2011-12-28

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