WO1999064189A1 - Procede et dispositif de coulee continue - Google Patents

Procede et dispositif de coulee continue Download PDF

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Publication number
WO1999064189A1
WO1999064189A1 PCT/JP1999/002879 JP9902879W WO9964189A1 WO 1999064189 A1 WO1999064189 A1 WO 1999064189A1 JP 9902879 W JP9902879 W JP 9902879W WO 9964189 A1 WO9964189 A1 WO 9964189A1
Authority
WO
WIPO (PCT)
Prior art keywords
rolling
piece
solidified
cast piece
thickness
Prior art date
Application number
PCT/JP1999/002879
Other languages
English (en)
Japanese (ja)
Inventor
Munehito Mizuno
Masahiro Ikeda
Tetsuji Shiozaki
Moriki Hashio
Original Assignee
Sumitomo Heavy Industries, Ltd.
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=15644108&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1999064189(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sumitomo Heavy Industries, Ltd. filed Critical Sumitomo Heavy Industries, Ltd.
Priority to EP99922589A priority Critical patent/EP1018382A1/fr
Publication of WO1999064189A1 publication Critical patent/WO1999064189A1/fr

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
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands

Definitions

  • the present invention relates to a continuous manufacturing method and a continuous manufacturing apparatus.
  • the thin piece produced by the continuous production equipment is further thinly rolled by a group of rolling mills in the subsequent process and formed into a thin plate, but at the stage of production, if the thin piece is made as thin as possible, Rolling processes can be reduced, and equipment costs such as rolling equipment can be reduced.
  • the present invention relates to a continuous manufacturing method and a continuous manufacturing apparatus for manufacturing such a thin piece. Background art
  • the thickness of the mold should be reduced when a thin piece is to be manufactured by a continuous manufacturing apparatus.However, the thickness of the mold is unlimited because the thickness of the nozzle for injecting molten steel is limited. It cannot be thinned. In the case of a type having a thickness substantially parallel to the direction of construction, if the thickness is less than 90 thighs, it is difficult to stably produce the type. Therefore, there is a case where the entrance side of the ⁇ type is kept thick, and is constricted toward the exit side, and the exit side thickness is set to 120 to 50 ⁇ .
  • the reduction must be completed before the two solidified shells on the long side are joined together, so the reduction can be performed under unsolidified pressure.
  • the thickness of the piece depends on the amount of solidified shell growth at the reduced position. There is a limit. ⁇
  • the rolling start position should be set immediately below the mold to complete the reduction while the solidified shell is thin, but if the solidified shell is reduced just below the mold, the cooling plate and solidified shell Influences the state of contact with steel and causes uneven solidification, causing breakouts and surface cracks.
  • increasing the rolling reduction per roll will cause internal cracks.
  • the rolling reduction is less than 10 thighs per roll and the rolling completion point is 1900 solids from the surface of molten steel. It is necessary to be later. Therefore, it was practically impossible to complete the reduction while the solidified shell was thin, and continuous production of sufficiently thin pieces was still impossible.
  • an object of the present invention is to provide a continuous manufacturing method and a continuous manufacturing apparatus that can reduce the thickness even more than the conventional non-solidification rolling method, and yet have good piece quality. Disclosure of the invention
  • a piece having a mold exit side thickness of 120 to 50 mm is solidified to a certain degree. After the growth, ⁇ the molten steel flows down in the unsolidified state where the molten steel is flowing at the center of the piece, and subsequently ⁇ even in the semi-solidified state where the flow of the molten steel at the center of the piece has ceased but is not completely solidified. It is characterized by reducing.
  • a non-roll-down area of 400 to 1000 thighs is provided immediately below a die having a delivery side thickness of 120 to 50 feet, and a non-solidified piece is lowered downstream thereof.
  • a non-solidification reduction roll group is provided, and further downstream, a semi-solidification reduction roll group is provided to reduce the flow of the molten steel at the central portion of the piece but before the solidification is complete.
  • FIG. 1 is a schematic configuration diagram of a continuous manufacturing apparatus according to an embodiment of the present invention
  • FIG. 2 is a graph showing a correlation between a piece temperature and a deformation resistance.
  • 1 is a ⁇ type
  • 2 is a supporting roll in a non-rolling area 2 A
  • 3 is a rolling roll in an unsolidified rolling area 3 A
  • 4 is a rolling roll in a semi-solidifying rolling area 4 A.
  • ⁇ type 1 may have parallel long sides facing each other, or may have a narrow interval between the long sides from the entry side to the exit side, but have a thickness of 120 to 50 bandages on the exit side. is there.
  • the non-roll-down region 2A has a length of 400 to 1000 bandits just below the type 1. During this time, the piece A is not reduced by the force guided by the support roll 2.
  • the molten steel injected into mold 1 is cooled by primary cooling in mold 1, and solidified shell s is formed on the surface of piece A. Coagulation is further promoted.
  • the unsolidified pieces A are reduced by the rolling rolls 3.
  • molten steel is flowing in the center of piece A, and it can be reduced with a small force.
  • the roll pitch can be reduced by using a small-diameter roll, so that bulging due to the molten steel static pressure is less likely to occur.
  • the piece A naturally cools, and the thickness of the solidified shell s increases. Then, under the reduction by the reduction roll 3, the thickness of the piece decreases.
  • a semi-solidification reduction region 4A is provided further downstream.
  • the molten steel does not flow at the center of the piece A, but the piece is not completely solidified.
  • this semi-solid state is a region where the average temperature of the cross section is 1200 ° C or the central temperature of the half is 1350 and does not become lower than 1400, and the average temperature of the solidified shell is 1250 to 1300.
  • the present inventor has found that in the semi-solidification reduction region 4A, the reduction can be performed with a reduction force much smaller than the reaction force of the solidification state conventionally considered.
  • the reduction roll 4 having the same small diameter as the reduction roll 3 used for the unsolidification reduction can be used also in the semi-solidified region 4A, a small mouth-to-litch can be obtained. Therefore, the solidified shell that has just been formed does not bulge, and it is rolled down in a high-temperature region where the rolling temperature (1100 ° C or more) outside the brittle zone of the piece can be secured. No cracks occur.
  • the rolling in the unsolidified rolling region 3 A and the semi-solid rolling region 4 A is performed by raising and lowering and tilting a rolling segment in which small-diameter rolling rolls are arranged with small pitches.
  • the thickness of the piece obtained by unsolidification reduction and semi-solidification reduction can be set freely by changing the amount of lifting and lowering and the amount of tilt of the reduction segment. Moves to the upstream side and the downstream side, and accordingly, the length of the uncoagulated rolling region 3 A and the length of the semi-solidified rolling region 4 A also fluctuate, but the deformation resistance in the semi-solidified region is It does not increase at once, and can be reduced to a predetermined thickness even if the solidification completion point moves.
  • ADVANTAGE OF THE INVENTION According to this invention, it can roll down further thinly than the conventional non-solidification drafting method, and also can manufacture continuously a piece with good piece quality.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de coulée continue, dans lequel une zone de non-laminage comprise entre 400 et 1000mm où le laminage n'est pas réalisé est prévue directement sous un moule (1) de 120 à 150mm d'épaisseur latérale de sortie, trois groupes de rouleaux de laminage non solidifiés (3) permettant de laminer une pièce coulée sont disposés sur le côté aval de la zone précitée, et quatre groupe de rouleaux de laminage semi-solidifiés (4) permettant de laminer une pièce coulée sont disposés sur le côté aval des rouleaux, le flux de l'acier en fusion étant éliminé de son centre avant sa solidification totale. La pièce coulée de 120 et 150mm d'épaisseur latérale à la sortie du moule est laminée à l'état non solidifié, l'acier en fusion s'écoulant du centre de la pièce coulée après croissance d'une coque solidifiée jusqu'à un certain degré et après laminage de cette coque également à l'état semi-solidifié. La pièce coulée n'est pas complètement solidifiée même si le flux de l'acier en fusion au centre de celle-ci est éliminé afin de former une pièce coulée de faible épaisseur ≤ 40mm, la pièce en fusion pouvant être rendue par laminage encore plus mince que les pièces obtenues par le procédé de laminage non solidifié traditionnel, la qualité de la pièce coulée devenant encore meilleure.
PCT/JP1999/002879 1998-06-05 1999-05-28 Procede et dispositif de coulee continue WO1999064189A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99922589A EP1018382A1 (fr) 1998-06-05 1999-05-28 Procede et dispositif de coulee continue

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10/157187 1998-06-05
JP15718798A JP3314036B2 (ja) 1998-06-05 1998-06-05 連続鋳造方法および連続鋳造装置

Publications (1)

Publication Number Publication Date
WO1999064189A1 true WO1999064189A1 (fr) 1999-12-16

Family

ID=15644108

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/002879 WO1999064189A1 (fr) 1998-06-05 1999-05-28 Procede et dispositif de coulee continue

Country Status (3)

Country Link
EP (1) EP1018382A1 (fr)
JP (1) JP3314036B2 (fr)
WO (1) WO1999064189A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800006563A1 (it) * 2018-06-21 2019-12-21 Impianto e procedimento per la produzione di un nastro metallico laminato a caldo

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006048511A1 (de) * 2006-10-13 2008-04-17 Sms Demag Ag Strangführungsvorrichtung und Verfahren für deren Betrieb

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6082257A (ja) * 1983-10-07 1985-05-10 Kawasaki Steel Corp 連続鋳造における連続鍛圧法
JPH0215858A (ja) * 1988-07-02 1990-01-19 Sumitomo Metal Ind Ltd 薄鋳片の連続鋳造方法及びその装置
JPH03114643A (ja) * 1990-06-02 1991-05-15 Nippon Steel Corp 連続鋳造法
JPH0890166A (ja) * 1994-09-21 1996-04-09 Sumitomo Metal Ind Ltd 連続鋳造装置及びその連続鋳造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6082257A (ja) * 1983-10-07 1985-05-10 Kawasaki Steel Corp 連続鋳造における連続鍛圧法
JPH0215858A (ja) * 1988-07-02 1990-01-19 Sumitomo Metal Ind Ltd 薄鋳片の連続鋳造方法及びその装置
JPH03114643A (ja) * 1990-06-02 1991-05-15 Nippon Steel Corp 連続鋳造法
JPH0890166A (ja) * 1994-09-21 1996-04-09 Sumitomo Metal Ind Ltd 連続鋳造装置及びその連続鋳造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800006563A1 (it) * 2018-06-21 2019-12-21 Impianto e procedimento per la produzione di un nastro metallico laminato a caldo
WO2019244192A1 (fr) * 2018-06-21 2019-12-26 Danieli & C. Officine Meccaniche S.P.A. Installation et procédé de fabrication d'une bande métallique laminée à chaud

Also Published As

Publication number Publication date
JP3314036B2 (ja) 2002-08-12
EP1018382A1 (fr) 2000-07-12
JPH11347700A (ja) 1999-12-21

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