EP1743721A2 - Procédé et dispositif de coulée continue de façonnage direct d'un métal, notamment d'une barre de coulée en matériaux à base d'acier - Google Patents

Procédé et dispositif de coulée continue de façonnage direct d'un métal, notamment d'une barre de coulée en matériaux à base d'acier Download PDF

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Publication number
EP1743721A2
EP1743721A2 EP06013599A EP06013599A EP1743721A2 EP 1743721 A2 EP1743721 A2 EP 1743721A2 EP 06013599 A EP06013599 A EP 06013599A EP 06013599 A EP06013599 A EP 06013599A EP 1743721 A2 EP1743721 A2 EP 1743721A2
Authority
EP
European Patent Office
Prior art keywords
strand
shell
reduction
distance
critical
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.)
Ceased
Application number
EP06013599A
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German (de)
English (en)
Other versions
EP1743721A3 (fr
Inventor
Albrecht Dr. Girgensohn
Uwe Plociennik
Lothar Schaps
Wolfgang Schmitz
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
Priority to EP10012057A priority Critical patent/EP2295170A3/fr
Publication of EP1743721A2 publication Critical patent/EP1743721A2/fr
Publication of EP1743721A3 publication Critical patent/EP1743721A3/fr
Ceased legal-status Critical Current

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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 and a continuous casting apparatus for deforming a cast-warm strand of metal, in particular of steel or steel materials, which is based on the principle of soft-reduction, i. in which a liquid sump or the strand cross section is reduced stepwise by employing one or more strand guide rollers successive of the deformation, of which at least one can be set in a group.
  • the technique of soft-reduction avoids or reduces adverse segregations and voids that question the usefulness of the cooled casting strand.
  • the soft-reduction gradually reduces the cast strand in its cross-section and eliminates or reduces the segregation and voids.
  • the strand guide rollers are used, which lie in the casting direction before Enderstarrung. It is assumed that the segregation and voids arise as a result of the shrinkage of the liquid sump.
  • the shrinkage due to the liquid / solid phase transformation is greater than the shrinkage of the solidifying strand shell.
  • the invention is based on the object deviating from the previous method to align the soft-reduction on the sump tip to align the required for the soft-reduction strand guide rollers on other parameters in order to achieve an even better result of the structure of the final solidification.
  • the stated object is achieved in that in each case a reference point within the liquid sump, in which an inflow or outflow of melt in strand direction is no longer completely possible, forms a critical shell distance, to be used as a reference for the driving of the deformation Strand guide rollers is selected.
  • the reference at a reference point before the first reduction and not selected as before after the reduction ie with the first deforming strand guide roller behind the sump geometry "x" begins the deformation.
  • This has the advantage that the start position for the soft-reduction is not influenced by the reduction itself and thus the strand guide rollers required for the reduction do not change.
  • the location and length of the soft-reduction zone may initially be unaffected by this stay. As a result, the end of the soft-reduction route is no longer determined as before, but the beginning of the soft-reduction route.
  • Another advantage of this approach is that with a little information, the employment of the soft-reduction can be determined.
  • the invention is illustrated by the fact that the first reduction roller is placed in the direction of the strand behind or at the location of the critical shell distance.
  • this reference variable based on the selected shell distance, is formed individually or as mixed value from casting material-specific, plant-specific and / or plant-specific values.
  • An embodiment is that the reference is selected as the distance to Kokillenbadspiegel. As a result, a correction of the Kokillenbadspiegels already lead to influence the position of the soft-reductions zone without changing other parameters.
  • Another formative measure arises from the fact that the reference variable from the temperature distribution of the liquid sump at the location of the critical shell distance is determined.
  • the advantage is again a readily available information with which the sump geometry can be determined.
  • Another embodiment is that the reference variable from the temperature distribution of the strand shell is determined at the location of the critical shell distance.
  • the reference variable from a proportion of the liquid phase in the residual melt (liquid fraction) or from a proportion of the solid phase in the residual melt (solid fraction) at the location of the critical strand shell distance is determined.
  • This control option is further enhanced by determining the reference value from the temperature distribution of the strand shell at the point of solidification or the sump tip.
  • a measured quantity can still be obtained by determining the reference variable from the decrease distribution of the course of a linear or progressive soft-reduction of the relevant casting material.
  • the reference value is additionally determined via the temperature distribution from the distance of the solidification or the sump tip from the bath level of the distribution vessel.
  • a device for continuous casting of liquid metals, in particular of steel or steel materials with the same objective, is based on a melt flow from a distribution vessel, in a continuous casting mold, with a secondary cooling section, a guide roller stand and subsequent soft-reduction zone in which the casting strand by means of individually or strand guide rollers which can be set in the composite can be reduced in the strand cross-section.
  • the soft-reduction zone is formed of several lengths of support roller segments or individual strand guide rollers and changeable long, with individual Strand guide rollers of these support roller segments in steps following the intended thickness reduction are adjustable and rotationally driven.
  • the first deforming strand guide roller is arranged at the reference point in which the shell distance is critical, i. there is no longer a complete exchange of melt within the liquid sump in strand running direction or a deforming strand guide role in strand direction (just) is arranged behind it.
  • the change in cross-section is made by employing one or more strand guide rollers 3 consecutive to the deformation, which are partly empty or adjustable and rotationally driven.
  • the following special method is used (FIG.
  • a reference point 5 within the liquid sump 2 of the soft-reduction is selected in that an inflow or outflow of melt in the stranding direction 16 is no longer completely possible, forms a critical shell spacing 8, which serves as a reference for the control of the deformation to be used strand guide rollers 3 is selected.
  • the reference quantity 6 is formed individually or as a mixed value based on the selected shell distance 8 from casting material-specific, plant-specific and / or operating-specific parameters and used in a calculation model which is already used for the soft reduction.
  • the reference variable 6 can be selected from the distance of the critical shell spacing 8 to Kokillenbadapt 10 a of the continuous casting mold 10 ( Figure 1).
  • the datum 6 can also be selected from the temperature distribution of the liquid sump 2 at the location of the critical shell spacing 8 (FIG. 2).
  • a check of the reference quantity 6 from the distance 11 of the solidification or the sump tip 2 b from the bath level 10 a in the continuous casting mold 10 can take place.
  • the reference variable 6 is additionally determined via the temperature distribution from the distance 12 of the solidification 2b or the sump tip 2b from the bath mirror 13 of the distribution vessel 14 (FIG. 1).
  • the reference size 6 can be selected from the temperature distribution of the strand shell 9 at the point of solidification or sump tip 2b (FIG. 2).
  • the reference quantity 6 can also be selected (additionally) from the decrease distribution 15 of the course of a linear or progressive soft-reduction of the relevant casting material (FIG. 2).
  • the continuous casting apparatus consists of the main groups (FIG. 1), distribution vessel 14, continuous casting mold 10, secondary cooling section 17, guide roller frame 18 and individual support roller segments 19 with reduction rollers 3a.
  • the soft-reduction zone 4 is formed of several lengths of support roller segments 19 and is changeable long, with individual strand guide rollers 3 of the support roller segments 19 in steps successively adjustable to the intended thickness reduction and are rotationally driven.
  • the first deforming strand guide roller 3a is located at the reference point 5 at which the shell distance 8 is critical, ie in the strand direction 16 a complete exchange of melt from areas before or after the critical shell distance 8 no longer takes place.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP06013599A 2005-07-01 2006-06-30 Procédé et dispositif de coulée continue de façonnage direct d'un métal, notamment d'une barre de coulée en matériaux à base d'acier Ceased EP1743721A3 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10012057A EP2295170A3 (fr) 2005-07-01 2006-06-30 Procédé et dispositif de coulée en continu pour déformer un faisceau coulé à chaud en métal, notamment en acier ou matières dérivées de l'acier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE10530837 2005-07-01

Publications (2)

Publication Number Publication Date
EP1743721A2 true EP1743721A2 (fr) 2007-01-17
EP1743721A3 EP1743721A3 (fr) 2008-04-23

Family

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Family Applications (1)

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EP06013599A Ceased EP1743721A3 (fr) 2005-07-01 2006-06-30 Procédé et dispositif de coulée continue de façonnage direct d'un métal, notamment d'une barre de coulée en matériaux à base d'acier

Country Status (1)

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EP (1) EP1743721A3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2209574A2 (fr) * 2007-11-19 2010-07-28 Posco Brame coulée continue et son procédé de fabrication
CN102398007A (zh) * 2010-09-15 2012-04-04 宝山钢铁股份有限公司 一种用于高铬合金钢大方坯连铸的轻压下工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS635859A (ja) 1986-06-25 1988-01-11 Nippon Steel Corp 高珪素鋼の連続鋳造方法
US5488987A (en) 1991-10-31 1996-02-06 Danieli & C. Officine Meccaniche Spa Method for the controlled pre-rolling of thin slabs leaving a continuous casting plant, and relative device
WO2003070399A1 (fr) 2002-02-22 2003-08-28 Sms Demag Aktiengesellschaft Procede et dispositif de coulee continue et de faconnage direct d'un metal, notamment d'une barre de coulee en materiaux a base d'acier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS635859A (ja) 1986-06-25 1988-01-11 Nippon Steel Corp 高珪素鋼の連続鋳造方法
US5488987A (en) 1991-10-31 1996-02-06 Danieli & C. Officine Meccaniche Spa Method for the controlled pre-rolling of thin slabs leaving a continuous casting plant, and relative device
WO2003070399A1 (fr) 2002-02-22 2003-08-28 Sms Demag Aktiengesellschaft Procede et dispositif de coulee continue et de faconnage direct d'un metal, notamment d'une barre de coulee en materiaux a base d'acier

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Gießen und Gießwalzen dünner Brammen bei der Mannesröhren-Werke AG", STAHL UND EISEN, vol. 110, no. 9-10, 1989

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2209574A2 (fr) * 2007-11-19 2010-07-28 Posco Brame coulée continue et son procédé de fabrication
EP2209574A4 (fr) * 2007-11-19 2012-02-01 Posco Brame coulée continue et son procédé de fabrication
US8245760B2 (en) 2007-11-19 2012-08-21 Posco Continuous cast slab and method for manufacturing the same
CN102398007A (zh) * 2010-09-15 2012-04-04 宝山钢铁股份有限公司 一种用于高铬合金钢大方坯连铸的轻压下工艺
CN102398007B (zh) * 2010-09-15 2013-05-29 宝山钢铁股份有限公司 一种用于高铬合金钢大方坯连铸的轻压下工艺

Also Published As

Publication number Publication date
EP1743721A3 (fr) 2008-04-23

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