EP1132161B1 - Procédé pour la coulée continue de brames, en particulier de brames minces - Google Patents

Procédé pour la coulée continue de brames, en particulier de brames minces Download PDF

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Publication number
EP1132161B1
EP1132161B1 EP01105743A EP01105743A EP1132161B1 EP 1132161 B1 EP1132161 B1 EP 1132161B1 EP 01105743 A EP01105743 A EP 01105743A EP 01105743 A EP01105743 A EP 01105743A EP 1132161 B1 EP1132161 B1 EP 1132161B1
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EP
European Patent Office
Prior art keywords
region
iii
mouth width
path
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
EP01105743A
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German (de)
English (en)
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EP1132161A1 (fr
Inventor
Hans Streubel
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
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SMS Demag AG
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Publication date
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Publication of EP1132161A1 publication Critical patent/EP1132161A1/fr
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    • 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 continuous casting of slabs, and in particular of thin slabs, in a continuous casting plant with a strand guide, comprising strand guide segments that can be adjusted in a clearance within a mold, in particular with pairs of rolls, wherein for the reduction of segregations and temporalities of the cast strand in the area of its Resterstarrung By reducing the strand guide segments in thickness is reduced (soft reduction).
  • the strand passes through a Soft Reduction track at the entrance he is not yet solidified, at whose End he should be solidified, what u. a. the casting speed one represents essential operating parameters.
  • the pairs of rolls in the soft reduction section will be used of individual segments beyond the shrinkage behavior of the strand set closer to improve in the area of Resterstarrung To achieve strand interior quality.
  • EP 0 834 364 describes a method and an apparatus for high-speed continuous casting plants with a strand thickness reduction during the Solidification, wherein melt preferably poured into an oscillating mold and the strand cross-section linearly over a minimum length of the strand guide directly under the mold, the so-called casting rolls, is reduced, with itself subsequent further strand reduction over the remaining strand guide, the "Soft-Reduction" until at most immediately before the final solidification or sump tip.
  • EP 0 177 796 B1 discloses a method for guiding and directing a G cashstranges in the straightening and outlet area of a Bogenstrangg manstrom, wherein oppositely arranged rollers of a spring force against the ferrostatic Pressure of the cast strand in a distance corresponding to the casting process being held.
  • This is a G manstrang Scheme increased strength is traced and in its passage between opposite roles the respective spring force reduced by a smaller additional power.
  • This proposal namely the clear distance or the jaw width via hydraulic cylinder with infinitely adjustable built-in inductive travel measurement and servo valves, requires a computational or metrological determination of the position of the sump tip.
  • the invention has the object, a effective method for improving the strand inner structure in its reduction area the Resterstarrung while avoiding increased role and bearing load which is mainly applicable to the central parts of the Stranges acts and the already solidified, marginal parts of the strand at the compression work spared.
  • An embodiment of the method provides that the cast strand in front of the area the soft reduction section with variably adjustable jaw width of the segments in at least one segment first decreasing to a range Mouth size in the nuclear liquid range is reduced ("Liquid Core Reduction") and then traverses a track area of increasing jaw width, and then in other segments in a reaching to the sump tip soft reduction range opens.
  • segment 2.2 is divided into the segment areas 2.2a and 2.2b. All segments have guide rollers 3, 3 'and are adjustable at a slight distance from each other.
  • FIG. 2 shows an embodiment of the method according to the invention, after which the casting strand 4 in front of the area of the soft reduction route at variable adjustable jaw width (W) of the rollers 3, 3 'first a parallel path 1 passes below the mold 1 in at least one first segment 2.1.
  • segment 2.2 is first reduced in a track area 2a Jaw width (-W) carried out a "liquid core reduction", then the cast strand passes through a section IIb of increasing jaw width (+ W). Thereafter, the casting strand 4 opens in other segments 2.3 to 2.4 or 2.5 (not shown) in a reaching to the sump tip soft reduction route III one.
  • the range of enlarged mouth width + W of the distance IIb of FIG. 2 is between in the areas of Liquid Core Reduction (IIa) and Soft-Reduction III.
  • An embodiment of the method according to the invention provides that the mouth width W is linearly enlarged before the area of soft reduction III. It can but also be made use of the measure that the mouth width W before range III of the soft reduction is increased non-linearly.
  • the advantage is that in the production of thin slabs to avoid a critical deformation of the strand shell, the enlargement of the jaw width W between 1 and 8 mm is set.
  • Fig. 3 the casting strand is shown in cross section.
  • the bilateral bulge 5 is caused by an enlarged gap width adjustment in front of the area the soft reduction section III. This bulge 5 will be in the range of the soft reduction range III completely or partially pushed back.
  • the solid line shows the cross-sectional contour of the bulged strand.
  • the dashed Line 5 ' shows the contour of the strand after leaving the soft reduction section.

Claims (11)

  1. Procédé pour la coulée continue de brames, en particulier de brames minces, dans une installation de coulée continue avec un guidage du brin (20), comprenant des segments (2.1 - 2.n) de guidage de brin sous une lingotière (1), avec un écartement réglable, en particulier avec des paires de rouleaux (3, 3'), l'épaisseur du brin (4) étant réduite dans la zone de sa solidification résiduelle par réglage des segments de guidage du brin (réduction douce) en vue de réduire les ressuages et les porosités du noyau du brin coulé (4), caractérisé en ce que le brin coulé (4), avant la zone de la réduction douce (III), est pourvu d'un renflement (5) ciblé par un réglage (W) correspondant de la largeur de l'ouverture des segments (2.1 - 2.n) suite à la pression interne ferrostatique et en ce que le renflement (5), dans le guidage des segments de la zone de réduction douce, est réduit totalement ou partiellement à l'épaisseur du brin dans laquelle la solidification résiduelle a lieu.
  2. Procédé selon la revendication 1, caractérisé en ce que la largeur de l'ouverture (W) d'au moins un segment (2.1 - 2.n) est réglée avant la zone de réduction douce (III) à une dimension supérieure à l'épaisseur de sortie de la lingotière (1).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le brin coulé (4), avant la zone de la réduction douce (III), avec une largeur d'ouverture (W) réglable de manière variable des segments (2.1 - 2.n), est d'abord réduit dans au moins un segment (2.2) dans une zone (IIa) avec une largeur d'ouverture qui diminue (-W) dans la zone à noyau liquide ("réduction du noyau liquide") puis il passe dans une zone (IIb) avec une largeur d'ouverture qui s'agrandit (+W) puis débouche dans d'autres segments (2.3 - 2.n) dans une zone de réduction douce (III) s'étendant jusqu'à une pointe de bain.
  4. Procédé selon la revendication 3, caractérisé en ce que la largeur d'ouverture (W) d'au moins un segment (2.1 à 2.n) est réglée avant la zone de réduction douce (III) à une dimension supérieure à l'épaisseur du brin après la zone de réduction du noyau liquide.
  5. Procédé selon au moins l'une quelconque des revendications 1 à 4, caractérisé en ce que le réglage de la largeur de l'ouverture des segments (21.1 à 2.n) est parallèle ou conique par rapport au brin coulé.
  6. Procédé selon au moins l'une quelconque des revendications précédentes 1 à 5, caractérisé en ce que la largeur de l'ouverture (W) est agrandie linéairement avant la zone de la réduction douce (III).
  7. Procédé selon au moins l'une quelconque des revendications précédentes 1 à 6, caractérisé en ce que la largeur de l'ouverture (W) est agrandie de manière non linéaire avant la zone de la réduction douce (III).
  8. Procédé selon au moins l'une quelconque des revendications précédentes 1 à 7, caractérisé en ce que lors de la fabrication de brames minces, l'agrandissement de la largeur de l'ouverture (+W) est réglée entre 1 et 8 mm.
  9. Procédé selon au moins l'une quelconque des revendications précédentes 1 à 8, caractérisé en ce que lors de la fabrication de brames, on règle un agrandissement de la largeur de l'ouverture (+W) entre 3 et 20 mm.
  10. Procédé selon au moins l'une quelconque des revendications précédentes 1 à 9, caractérisé en ce que la zone de largeur de l'ouverture (+W) agrandie est disposée entre les zones de la réduction du noyau liquide (IIa) et la zone de réduction douce (III).
  11. Procédé selon au moins l'une quelconque des revendications précédentes 1 à 10, caractérisé en ce que le brin coulé (4) passe d'abord dans une zone parallèle (I) sous la lingotière (1) dans au moins un premier segment (2.1) et la zone (IIa) de la réduction du noyau liquide et la zone (III) de réduction douce sont consécutives.
EP01105743A 2000-03-10 2001-03-08 Procédé pour la coulée continue de brames, en particulier de brames minces Expired - Lifetime EP1132161B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10011689 2000-03-10
DE10011689A DE10011689A1 (de) 2000-03-10 2000-03-10 Verfahren zum Stranggiessen von Brammen und insbesondere von Dünnbrammen

Publications (2)

Publication Number Publication Date
EP1132161A1 EP1132161A1 (fr) 2001-09-12
EP1132161B1 true EP1132161B1 (fr) 2005-05-04

Family

ID=7634219

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01105743A Expired - Lifetime EP1132161B1 (fr) 2000-03-10 2001-03-08 Procédé pour la coulée continue de brames, en particulier de brames minces

Country Status (8)

Country Link
US (1) US6612364B2 (fr)
EP (1) EP1132161B1 (fr)
JP (1) JP2001269757A (fr)
AT (1) ATE294654T1 (fr)
CA (1) CA2340510C (fr)
DE (2) DE10011689A1 (fr)
ES (1) ES2240262T3 (fr)
MX (1) MXPA01002501A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007016575A1 (de) 2007-04-07 2008-10-09 Sms Demag Ag Strangführungsvorrichtung

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10057160A1 (de) * 2000-11-16 2002-05-29 Sms Demag Ag Verfahren und Vorrichtung zum Herstellen von Dünnbrammen
DE10122118A1 (de) * 2001-05-07 2002-11-14 Sms Demag Ag Verfahren und Vorrichtung zum Stranggiessen von Blöcken, Brammen und Dünnbrammen
DE102005028711A1 (de) * 2005-06-20 2006-12-28 Siemens Ag Verfahren zur Regelung und/oder Steuerung eines verstellbaren Rollensegmentes in einer Stranggießanlage
DE102005028703A1 (de) * 2005-06-20 2006-12-28 Siemens Ag Verfahren zur Regelung und/oder Steuerung eines Anstellsegmentes in einer Stranggießanlage und Vorrichtung hierfür
JP5476959B2 (ja) * 2009-12-08 2014-04-23 Ｊｆｅスチール株式会社 軽圧下連続鋳造方法
JP5929836B2 (ja) * 2013-05-30 2016-06-08 Ｊｆｅスチール株式会社 鋼の連続鋳造方法
CN107081412B (zh) * 2017-04-01 2019-08-09 唐山钢铁集团有限责任公司 高品质塑料模具钢特厚板连铸母坯的制备方法
CN110523942B (zh) * 2019-08-29 2021-11-23 邢台钢铁有限责任公司 一种改善高碳铬轴承钢大方坯内部缺陷的控制方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519439A (en) * 1977-07-26 1985-05-28 Jernjontoret Method of preventing formation of segregations during continuous casting
DE3437178A1 (de) 1984-10-10 1986-04-10 SMS Schloemann-Siemag AG, 4000 Düsseldorf Verfahren und vorrichtung zum fuehren und richten eines giessstranges im richt- und auslaufbereich einer bogenstranggiessanlage
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
DE4338805C2 (de) * 1993-11-12 1995-10-26 Schloemann Siemag Ag Verfahren und Vorrichtung zum Betreiben einer Stranggießanlage
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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007016575A1 (de) 2007-04-07 2008-10-09 Sms Demag Ag Strangführungsvorrichtung
EP1980344A1 (fr) 2007-04-07 2008-10-15 SMS Demag AG Dispositif de guidage de barre

Also Published As

Publication number Publication date
US20010020528A1 (en) 2001-09-13
DE10011689A1 (de) 2001-09-13
CA2340510A1 (fr) 2001-09-10
CA2340510C (fr) 2009-06-02
MXPA01002501A (es) 2003-08-20
ES2240262T3 (es) 2005-10-16
JP2001269757A (ja) 2001-10-02
US6612364B2 (en) 2003-09-02
DE50106063D1 (de) 2005-06-09
EP1132161A1 (fr) 2001-09-12
ATE294654T1 (de) 2005-05-15

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