EP0417492A2 - Vertikal-Stranggussverfahren und Giesseinrichtung - Google Patents

Vertikal-Stranggussverfahren und Giesseinrichtung Download PDF

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Publication number
EP0417492A2
EP0417492A2 EP90115569A EP90115569A EP0417492A2 EP 0417492 A2 EP0417492 A2 EP 0417492A2 EP 90115569 A EP90115569 A EP 90115569A EP 90115569 A EP90115569 A EP 90115569A EP 0417492 A2 EP0417492 A2 EP 0417492A2
Authority
EP
European Patent Office
Prior art keywords
strand
light reduction
continuous casting
reduction means
solidification
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.)
Granted
Application number
EP90115569A
Other languages
English (en)
French (fr)
Other versions
EP0417492A3 (en
EP0417492B1 (de
Inventor
Kiyoshi Morii
Shuzo Kumura
Shyzunori Hayakawa
Yoshio Inagaki
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.)
Daido Steel Co Ltd
Original Assignee
Daido Steel Co 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
Application filed by Daido Steel Co Ltd filed Critical Daido Steel Co Ltd
Publication of EP0417492A2 publication Critical patent/EP0417492A2/de
Publication of EP0417492A3 publication Critical patent/EP0417492A3/en
Application granted granted Critical
Publication of EP0417492B1 publication Critical patent/EP0417492B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B22D11/14—Plants for continuous casting
    • B22D11/141—Plants for continuous casting for vertical casting

Definitions

  • This invention relates to an improvement of a vertical continuous casting or casting technique of obtaining cast pieces through drawing a strand formed in a water-cooled mold downward without incurvating, and cutting the strand.
  • a continuous casting process holds an important position in a steel casting.
  • a horizontal continuous casting process is something problematical in a technical aspect, and hence is only tried in part, and thus what is overwheling today is a curved and vertical continuous casting.
  • the vertical continuous casting is rather disadvantageous to require a high structure for the equipment, entailing a high cost of equipment.
  • employed prevailingly is the curved continuous casting wherein a strand is incurvated (a water-cooled mold being structured practically so as to provide the curved strand) to extend horizontally, thereby keeping a height of the casting equipment within a certain limit.
  • the strand extending horizontally is rectified to be straight with pinch rolls and cut with a frame cutter into cast pieces.
  • the object of this invention is to provide a method and apparatus for vertical continuous casting wherein a light reduction is applied to a strand at an optimal position at all times in coping flexibly with casting conditions fluctuating frequently so that the cast pieces of superior quality may be produced.
  • the method of the present invention comprises, as shown in Fig. 1, positioning light reduction means (4), or pinch rolls representatively, just prior to a solidification completing point of a strand (5A) or a point at which an unsolidified portion (52) within a shell (51) disappears, applying light reduction strong enough to compensate contraction caused by solidification of the strand.
  • the apparatus of the present invention comprises providing light reduction means (4) variably in position downward the water-cooled mold so as to apply light reduction strong enough to compensate contraction due to solidification to the strand just before the solidification completing point of the strand.
  • a reference character (58) denotes a cast piece obtained from cutting the strand, which will be carried away by a separate device one by one.
  • the light reduction means and a technique for providing it variably in position are arbitrary, however, devices shown in Fig. 3 to Fig. 5 will be exemplified as typical.
  • the device is constructed such that three pairs of pinch rolls (41a, 41b, 4lc) are mounted on a frame 42, and the frame (42) is made movable vertically along four pieces of vertical guide columns (43).
  • Each pinch roll is mounted slidably on the frame to advance and retreat by hydraulic cylinders (44a, 44b, 44c) fixed on the frame to pinch the strand (5A) from opposite sides, driven by motors (45a, 45b, 45c), and is capable of applying a desired light reduction on the strand metal.
  • Positions of the pinch rolls (41a to c) can be changed by worm-jack mechanisms (7) moving vertically from having four pieces of vertical bars (46) on a lower portion of the frame (42) rotated according to rotations of a motor (6) and male screws of the vertical bars engaged with fixed female screws.
  • Fig. 6 indicates another mode of providing the light reduction means variably in position.
  • a construction of the light reductions means namely, the frame and the pinch rolls fitted thereon and other parts is same as the example described above, however, what is different is that a vertical movement of the frame is realized by taking up and delivering a wire (9) laid on pulleys (8a, 8b, 8c, 8d and 8e).
  • a position of the light reduction means is made variable, adjusted to a solidification completing point fluctuating according to conditions such as steel kind to be subjected to the continuous casting, sectional size of a strand, drawing speed and others, and from carrying out a light reduction at an optimal position, the effect will be enhanced so high.
  • a techinque for detecting a solidification completing point by utilizing the phenomenon that a propagation speed of ultrasonic wave varies in solid and liquid. It is therefore preferable that a device for detecting a solid/liquid interface on an ultrasonic wave is added to the light reduction means (4), a solidification completing point in a strand is found to postion the light reduction means in starting the operation, light reduction is thus performed precisely, and when the solidification completing point fluctuates according to changes in steel kind to be subjected to the continuous casting and in casting conditions, the light reduction means is made to follow thereto and the position is modified accordingly.
  • the strand is drawn by the aforementioned drawing drive rolls, therefore a driving force is not required for the light reduction pinch rolls to have.
  • the light reduction pinch rolls will be utilized advantageously for inserting dummy bars into the water-cooled mold when starting the casting operation.
  • the object is attained by providing a driving function to the light reduction pinch rolls, therefore, the aforementioned apparatus is provided with a driving motor.
  • a light reduction just prior to a solidification completing point in casting a special steel vertically and continuously can be now realized at an optimal position always corresponding to the strand sectional size and changes in casting conditions.
  • a quality product is ready for securing in meeting severe requirements on quality for the special steel such as prevention of center cavities, lessening of center segregation and so forth.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP90115569A 1989-08-16 1990-08-14 Vertikal-Stranggussverfahren und Giesseinrichtung Expired - Lifetime EP0417492B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP211067/89 1989-08-16
JP21106789 1989-08-16
JP164256/90 1990-06-25
JP2164256A JP2964560B2 (ja) 1989-08-16 1990-06-25 垂直連続鋳造装置

Publications (3)

Publication Number Publication Date
EP0417492A2 true EP0417492A2 (de) 1991-03-20
EP0417492A3 EP0417492A3 (en) 1992-05-13
EP0417492B1 EP0417492B1 (de) 1995-04-19

Family

ID=26489436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90115569A Expired - Lifetime EP0417492B1 (de) 1989-08-16 1990-08-14 Vertikal-Stranggussverfahren und Giesseinrichtung

Country Status (3)

Country Link
EP (1) EP0417492B1 (de)
JP (1) JP2964560B2 (de)
DE (1) DE69018740T2 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0450391A1 (de) * 1990-04-05 1991-10-09 Sms Schloemann-Siemag Aktiengesellschaft Vorrichtung zur Stützung eines Metallgiessstranges, insbesondere zur Weichreduktion bei einer Vorband-Giessanlage
EP0545104A2 (de) * 1991-11-26 1993-06-09 Sms Schloemann-Siemag Aktiengesellschaft Verfahren und Vorrichtung zum Stranggiessen von Brammen oder Blöcken
EP0663250A1 (de) * 1994-01-14 1995-07-19 Daido Tokushuko Kabushiki Kaisha Verfahren zum Stranggiessen von Stählen
EP2857122A4 (de) * 2012-05-24 2016-01-20 Nippon Steel & Sumitomo Metal Corp Verfahren zum stranggiessen von platten
CN108941493A (zh) * 2018-08-30 2018-12-07 东北大学 一种实验室用小方坯立式连铸机辊列及其使用方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19941120A1 (de) * 1999-08-25 2001-07-05 Mannesmann Ag Verfahren zur Beurteilung des Bereiches der Mittenebene von Stranggußbrammen
JP2001205407A (ja) * 2000-01-25 2001-07-31 Nippon Steel Corp ビレットの連続鋳造方法
JP5741402B2 (ja) * 2011-11-25 2015-07-01 新日鐵住金株式会社 円形断面鋳片の連続鋳造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1451901A (fr) * 1965-11-02 1966-01-07 G Sojuzny I Projektirovanya Me Dispositif de guidage dans la zone du refroidissement secondaire pour installations de coulée continue de métaux
CH440569A (de) * 1966-12-28 1967-07-31 Moossche Eisenwerke Ag Verfahren und Vorrichtung zum Stranggiessen von Knüppeln
AU419372B1 (en) * 1966-03-07 1971-12-01 Guiding device for ingots in secondary cooling zone in continuous casting plants
WO1987000099A1 (fr) * 1985-06-25 1987-01-15 Clecim Procede et machine de coulee continue d'un produit metallique mince

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1451901A (fr) * 1965-11-02 1966-01-07 G Sojuzny I Projektirovanya Me Dispositif de guidage dans la zone du refroidissement secondaire pour installations de coulée continue de métaux
AU419372B1 (en) * 1966-03-07 1971-12-01 Guiding device for ingots in secondary cooling zone in continuous casting plants
CH440569A (de) * 1966-12-28 1967-07-31 Moossche Eisenwerke Ag Verfahren und Vorrichtung zum Stranggiessen von Knüppeln
WO1987000099A1 (fr) * 1985-06-25 1987-01-15 Clecim Procede et machine de coulee continue d'un produit metallique mince

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0450391A1 (de) * 1990-04-05 1991-10-09 Sms Schloemann-Siemag Aktiengesellschaft Vorrichtung zur Stützung eines Metallgiessstranges, insbesondere zur Weichreduktion bei einer Vorband-Giessanlage
EP0545104A2 (de) * 1991-11-26 1993-06-09 Sms Schloemann-Siemag Aktiengesellschaft Verfahren und Vorrichtung zum Stranggiessen von Brammen oder Blöcken
EP0545104A3 (en) * 1991-11-26 1993-06-30 Sms Schloemann-Siemag Aktiengesellschaft Method and apparatus for continuous casting of ingots or blooms
EP0663250A1 (de) * 1994-01-14 1995-07-19 Daido Tokushuko Kabushiki Kaisha Verfahren zum Stranggiessen von Stählen
EP2857122A4 (de) * 2012-05-24 2016-01-20 Nippon Steel & Sumitomo Metal Corp Verfahren zum stranggiessen von platten
CN108941493A (zh) * 2018-08-30 2018-12-07 东北大学 一种实验室用小方坯立式连铸机辊列及其使用方法

Also Published As

Publication number Publication date
DE69018740T2 (de) 1995-09-28
EP0417492A3 (en) 1992-05-13
JP2964560B2 (ja) 1999-10-18
DE69018740D1 (de) 1995-05-24
JPH03155441A (ja) 1991-07-03
EP0417492B1 (de) 1995-04-19

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