EP1441871B1 - Procede et machine de coulee permettant de fabriquer des barres de coulee sous forme de blocs ou de billettes - Google Patents

Procede et machine de coulee permettant de fabriquer des barres de coulee sous forme de blocs ou de billettes Download PDF

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Publication number
EP1441871B1
EP1441871B1 EP02785358A EP02785358A EP1441871B1 EP 1441871 B1 EP1441871 B1 EP 1441871B1 EP 02785358 A EP02785358 A EP 02785358A EP 02785358 A EP02785358 A EP 02785358A EP 1441871 B1 EP1441871 B1 EP 1441871B1
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EP
European Patent Office
Prior art keywords
casting
region
profile
sided
soft 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
EP02785358A
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German (de)
English (en)
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EP1441871A2 (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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Application filed by SMS Demag AG filed Critical SMS Demag AG
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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 the production of cast strands in billet or block format, which are formed in a continuous casting mold into a cast strand and below the same in a strand guide with a casting radius a deflection from the vertical to the horizontal casting direction and then pass through a directional range, wherein the casting is guided between pairs of rolls, which is followed by a soft-reduction region with at least one pair of rolls.
  • the invention also relates to a casting machine for carrying out the method.
  • the strand is selectively reduced in thickness in the region of Resterstarrung with one or preferably more pairs of rolls. Therein, the reduction in thickness in the area of the soft reduction can take place uniformly or unevenly.
  • strand cross-sections for soft reduction are formed with one-sided or multi-sided profile peaks or profile depressions, in order to achieve a significant improvement in the quality of the strand within a comparatively low power requirement.
  • the soft reduction begins in the straightening area of the cast strand by adjusting the straightening rollers.
  • speed and strand cooling must be set so that the residual solidification also takes place in the straightening area.
  • the casting radius must be significantly increased for this purpose. This leads to significant additional costs of the corresponding system.
  • a position of the rollers against spacers or the use of preferably position-controlled hydraulic cylinder is required to avoid smooth rolling a strand reduction in the wrong place.
  • the document US 3,628,594 describes a device for reducing the cross-section of a cast strand comprising a pair of rollers drivable in a horizontal plane and pairs of drivable rollers arranged in vertical planes on opposite sides of the strand.
  • the pairs of rollers through which the strand passes are counter to each other by means of hydraulic medium adjustable piston / cylinder units which serve to reduce vertical and horizontal cross-sectional dimensions of the casting.
  • the unpublished German patent application with the file reference 101 44 234.3 describes a method and an apparatus for optimizing the quality of cast strands with round or approximately round cross-sections in the field of soft reduction.
  • the casting strands are deformed under the mold in the region of Resterstarrung in at least one reducing plane by adjustable rollers to improve the internal quality reducing.
  • the round or approximately round casting cross-section can be deformed by rollers set on both sides and offset by 90 ° to the reduction plane by an amount between 5% and 60% of the main reduction in the region of the solidification in order to increase the internal quality by means of a further core consolidation.
  • rollers which can be set on both sides and offset by approximately 90 ° relative to the reduction plane.
  • the document JP 12 37 062 provides that internal cracks in a cast strand during straight bending, even at higher casting speeds, are avoided by virtue of the strand having a retrograde trapezoidal format.
  • the strand is formed in a mold with trapezoidal casting format of the inner wall surfaces whose width on the inside of the sheet is greater than the Width of the shape on the outside of the arch is to form the retrogressive trapezoidal format.
  • the document JP 63 21 5353 shows a method for easier processing of a cast strand by carrying out the casting process using a water-coolable mold with a round or polygonal format.
  • the continuous casting machine is followed by roller groups for stepwise rolling reduction, which perform the intended reduction alternately vertically and horizontally.
  • stepwise rolling reduction which perform the intended reduction alternately vertically and horizontally.
  • the continuously cast material with round or polygonal format is reduced by rolling before solidification in the central area and it segregation or voids are avoided.
  • the continuous casting material is divided into intended lengths to obtain individual castings.
  • the processing is facilitated, the formation of Lunkem and central segregations avoided and improves the quality of the structure significantly.
  • the document JP 12 02 342 proposes the formation of notches in a part of the upper format side of the cast strand for reducing the tensile stress in the solidified region of a cast strand and improving its production from molten steel, and shaping the notched region during the continuous casting process .
  • the cast strand After the cast strand has been pulled out vertically from the mold, it is first bent into a circular shape and then led to a horizontal stretching area.
  • the strand is fed with upper and lower squeezing rollers in the horizontal stretching area to stretch it in the horizontal format. After complete solidification in the area of the sump tip of the strand is cut by means of cutting torch on the outer side of the horizontal stretch region.
  • the document JP 21 42 654 allows the production of a round cast strand without internal cracking by stretching the cast strand by means of stretch rollers and pulling by means of rotating pinch rollers after solidification. By this method, a bending stress only becomes effective in the non-solidified portion of the strand, thereby reducing the formation of internal cracks.
  • German Offenlegungsschrift 2 056 473 discloses a device for producing cast steel strands, comprising a mold, a curved strand guide and a strand conveying and deforming device having a pair of caliber rolls.
  • the caliber roller pair contains a box caliber with a constriction in the caliber base.
  • the rollers of the roller pairs are connected to an adjustable pressing device.
  • a first pair of rollers may be followed by at least one further pair of rollers with chisel caliber, wherein the axes of the successive pairs of rollers are each rotated by 90 °.
  • the invention has for its object to provide a method and a casting machine for billets / and block formats, with the or in the improvement of the internal quality of the cast strand can be achieved safely.
  • the cast strands are formed in their directional range using profiled pairs of rollers with one or more profile profile elevations or profile recesses , And that they are subjected in the casting behind the directional area by means of at least one pair of rollers with smooth rollers of a soft reduction, for optimum adaptation of the pairs of rollers to the position of the sump tip these are moved approximately horizontally in the casting direction or against the casting direction and / or the pairs of rollers in the area of the soft reduction section B, depending on the position of the sump tip.
  • the soft reduction can preferably be carried out with a pair of rollers.
  • z. B. is determined by displacement or force measurement, after which the pairs of rollers are made accordingly.
  • This measure is expedient in particular for steel grades with strong segregation tendencies and / or core porosities, wherein profile elevations or profile depressions of the strand cross-section are provided on all four sides.
  • a profile height of max. 8% of the thickness of the reduced strand are complied with, with two-sided profiling a profile height on each side with max. 6%, and if profiled on all sides, a profile height on each side with max. 4% are respected. Also, a width of the profile with 30 - 80% of the corresponding side length should be maintained.
  • a casting machine for the production of cast strands in billet or block format comprising a continuous casting mold for forming a cast strand, which is provided with a strand guide with a casting radius R for deflecting the cast strand from the vertical to the horizontal casting direction and then with a directional area A with pairs of rolls to which a soft-reduction region B adjoins with at least one pair of rollers, according to the invention is designed in such a way that profiled pairs of rolls with one-sided or multi-sided profile elevations h, b or profile recesses -h, b are assigned to the directional region A of the casting strands.
  • Figure 1 shows a casting machine with the mold 1 when applying molten steel 10 and forming a cast strand 2 below the mold.
  • the strand 2 passes through the casting radius R a deflection, from the vertical casting direction in the horizontal direction 13 with the tangent point 3.
  • This tangent point 3 is located approximately in the middle of the directional area A, with the straightening rollers 4, 5, 6 to which the soft reduction area B adjoins.
  • the soft reduction takes place in the soft reduction area B with the roller pairs 7, 8, 9 using smooth rollers.
  • the soft reduction with the help of strand cooling and the casting speed can be set so that it ends with the bottom tip at the end of the soft reduction region B starting at the directional area A.
  • Figures 2 a to 2 c show the formation of cast strip cross sections according to the invention with one or more sided profile peaks (h, b) with the resulting cross-sectional shapes C, D, E.
  • FIGS. 3 a to 3 c show cast strand cross sections according to the invention, which are formed with profile recesses (-h, b) and have the cross-sectional shapes F, G, H.
  • the respective profile recesses are designated by -h (or -h ') on the opposite side.
  • the profiled rollers of the roller pairs 4, 5, 6 used for the production of the profile shapes correspond to profile elevations of the embodiment according to FIG. Fig. 4a with the format 11, while the format 12 are formed for the production of profile recesses.

Claims (13)

  1. Procédé de production de barres de coulées (2) en format billettes ou blocs, qui dans une lingotière pour coulée continue (1) sont formées en une barre coulée (2) et qui sous cette dernière traversent dans un guide-barre avec un rayon de coulée R un renvoi de la direction de coulée (13) verticale vers la direction de coulée horizontale, puis une zone de dressage A, dans laquelle la barre de coulée (2) est guidée entre des paires de rouleaux (4, 5, 6), sur laquelle se raccorde une zone de réduction soft B, avec au moins une paire de rouleaux (7, 8, 9)
    caractérisé en ce que
    dans la zone de dressage (A), en utilisant des paires de rouleaux profilés (4, 5, 6), les barres de coulée (2) sont conçues avec des surhaussements de profil (h, b) ou des renfoncements de profil (-h, b) sur un ou sur plusieurs côtés et en ce qu'elles sont soumises à une réduction soft au moyen d'au moins une paire de rouleaux (7, 8, 9) avec des rouleaux lisses, derrière la zone de dressage (A), dans le sens de coulée (13), alors que pour l'adaptation optimale des paires de rouleaux (7, 8, 9) à la position de la pointe du pied de bain, elles sont déplacées approximativement à l'horizontale dans le sens de coulée (13) ou à l'encontre du sens de coulée (13), et/ou en ce que les paires de rouleaux (7, 8, 9) sont rapprochées ou écartées dans la zone du trajet de réduction soft (B), en fonction de la position du pied de bain.
  2. Procédé selon la revendication 1, caractérisé en ce que la réduction soft (B) est réalisée de préférence avec plusieurs paires de rouleaux (7, 8, 9).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la position de la pointe du pied de bain est déterminée au moyen de modèles de calcul et/ou par technique de mesure, par exemple par odométrie ou par dynamométrie, suite à quoi, les paires de rouleaux (7, 8, 9) sont mises en prise de façon conséquente.
  4. Procédé selon l'une quelconque ou plusieurs des revendications 1 à 3, caractérisé en ce que dans le cas de surhaussements de profil (h, b ; h', b') ou de renfoncements de profil (-h, b ; 'h', b) sur les deux côtés, ceux-ci sont prévus de préférence sur des côtés opposés de la barre de coulée (2).
  5. Procédé selon l'une quelconque ou plusieurs des revendications 1 à 4, caractérisé en ce que pour des qualités d'acier avec de fortes tendances à la ségrégation et/ou une porosité à coeur, des surhaussements de profil (j, b) ou des renfoncements de profil (-h, b) de la section transversale de la barre sont prévus sur les quatre côtés de la barre de coulée (2).
  6. Procédé selon l'une quelconque ou plusieurs des revendications 1 à 5, caractérisé en ce que dans le cas d'un profilage unilatéral, une hauteur de profil (h) d'un maximum de 8 % de l'épaisseur de la barre de coulée réduite (2) est respectée.
  7. Procédé selon l'une quelconque ou plusieurs des revendications 1 à 5, caractérisé en ce que dans le cas d'un profilage bilatéral, une hauteur de profil (h) d'un maximum de 6 % est respectée sur chaque côté de la barre de coulée.
  8. Procédé selon l'une quelconque ou plusieurs des revendications 1 à 5, caractérisé en ce que dans le cas d'un profilage sur tous les côtés, une hauteur de profil (h) d'un maximum de 4 % est respectée sur chaque côté de la barre de coulée.
  9. Procédé selon l'une quelconque ou plusieurs des revendications 1 à 8, caractérisé en ce qu'une largeur (B) de profil correspondant à de 30 à 80 % de la longueur du côté correspondant de la barre de coulée est respectée.
  10. Machine de coulée pour la production de barres de coulée (2) en format billettes ou blocs, comprenant une lingotière de coulée continue (1) pour former une barre coulée (2) qui est munie d'un guide-barre avec un rayon de coulée (R) pour renverser la barre de coulée de la direction de coulée verticale dans la direction de coulée horizontale (13), puis d'une zone de dressage (A) avec des paires de rouleaux (4, 5, 6), à laquelle se raccorde une zone de réduction soft (B), avec au moins une paire de rouleaux (7, 8, 9),
    caractérisée en ce que
    des paires de rouleaux profilés (4, 5, 6) avec des surhaussements de profil (h, b) ou des renfoncements de profil (-h, b) sur un ou sur plusieurs côtés sont associées à la zone de dressage (A) des barres de coulée (2) et en ce que pour la zone de la réduction soft (B), au moins une paire de rouleaux (7, 8, 9) avec des rouleaux lisses est montée en aval, alors que pour l'adaptation optimale des paires de rouleaux (7, 8, 9) à la position de la pointe du pied de bain, elles sont déplaçables approximativement à l'horizontale dans le sens de coulée (13) ou à l'encontre du sens de coulée (13), et/ou en ce que les paires de rouleaux (7, 8, 9) sont susceptibles d'être rapprochées ou écartées dans la zone du trajet de réduction soft (B), en fonction de la position du pied de bain.
  11. Machine de coulée selon la revendication 10, caractérisée en ce que pour la zone de dressage (A), au moins une paire de rouleaux (4, 5, 6) avec des rouleaux profilés est prévue des deux côtés du point tangentiel (3).
  12. Machine de coulée selon la revendication 10 ou 11, caractérisée en ce que la/les paire(s) de rouleaux sont placées à l'horizontale et/ou à la verticale dans la zone de la réduction soft (B).
  13. Machine de coulée selon l'une quelconque ou plusieurs des revendications 10 à 12, caractérisée en ce que les rouleaux des paires de rouleaux sont conçus avec un profilage (4, 5, 6) avec des zones de diamètre négatives (-h, b) ou avec des zones de diamètre positives (+h, b).
EP02785358A 2001-11-06 2002-11-04 Procede et machine de coulee permettant de fabriquer des barres de coulee sous forme de blocs ou de billettes Expired - Lifetime EP1441871B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10153960 2001-11-06
DE10153960A DE10153960A1 (de) 2001-11-06 2001-11-06 Verfahren und Gießmaschine zum Stranggießen von Knüppel- und Blockformaten oder dergleichen
PCT/EP2002/012263 WO2003039789A2 (fr) 2001-11-06 2002-11-04 Procede et machine de coulee permettant de fabriquer des barres de coulee sous forme de blocs ou de billettes

Publications (2)

Publication Number Publication Date
EP1441871A2 EP1441871A2 (fr) 2004-08-04
EP1441871B1 true EP1441871B1 (fr) 2007-04-18

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ID=7704458

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Application Number Title Priority Date Filing Date
EP02785358A Expired - Lifetime EP1441871B1 (fr) 2001-11-06 2002-11-04 Procede et machine de coulee permettant de fabriquer des barres de coulee sous forme de blocs ou de billettes

Country Status (6)

Country Link
US (3) US20050067135A1 (fr)
EP (1) EP1441871B1 (fr)
AT (1) ATE359887T1 (fr)
AU (1) AU2002350668A1 (fr)
DE (2) DE10153960A1 (fr)
WO (1) WO2003039789A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010007659B4 (de) 2010-01-12 2019-05-09 Sms Group Gmbh Stranggießmaschine mit einem Kaltstrang
CN113118397B (zh) * 2021-03-15 2023-01-31 上海二十冶建设有限公司 一种立式连铸机轻压模块的整体式底座及其调整方法
CN114054700B (zh) * 2021-10-15 2022-11-15 东北大学 圆坯的压下方法及装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537356A (en) * 1942-11-28 1951-01-09 See Fabriks Aktiebolag Rolling mill for the production of conical tubes
AT251213B (de) * 1964-07-03 1966-12-27 Boehler & Co Ag Geb Verfahren zur Herstellung von Quadrat- oder Rundsträngen
DE1602127A1 (de) * 1967-08-12 1970-04-09 Olsson Ag Erik Verfahren zur Beseitigung bzw. Verringerung von Innenfehlern bei Halbzeug,insbesondere bei gegossenen Bloecken,Brammen,Knueppeln u.dgl.
US3650314A (en) * 1969-11-19 1972-03-21 Bohler & Co Ag Fa Geb Apparatus for manufacturing stretch-formed products of high-melting metals
US3837391A (en) * 1971-02-01 1974-09-24 I Rossi Continuous casting apparatus
US4519439A (en) * 1977-07-26 1985-05-28 Jernjontoret Method of preventing formation of segregations during continuous casting
DE4138740A1 (de) * 1991-11-26 1993-05-27 Schloemann Siemag Ag Verfahren und vorrichtung zum stranggiessen von brammen oder bloecken

Also Published As

Publication number Publication date
WO2003039789A3 (fr) 2003-12-24
EP1441871A2 (fr) 2004-08-04
US20090178777A1 (en) 2009-07-16
US20050067135A1 (en) 2005-03-31
DE50209992D1 (de) 2007-05-31
ATE359887T1 (de) 2007-05-15
WO2003039789A2 (fr) 2003-05-15
DE10153960A1 (de) 2003-05-22
US20080041554A1 (en) 2008-02-21
AU2002350668A1 (en) 2003-05-19

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