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EP2295170A2 - 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 - Google Patents

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 Download PDF

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Publication number
EP2295170A2
EP2295170A2 EP10012057A EP10012057A EP2295170A2 EP 2295170 A2 EP2295170 A2 EP 2295170A2 EP 10012057 A EP10012057 A EP 10012057A EP 10012057 A EP10012057 A EP 10012057A EP 2295170 A2 EP2295170 A2 EP 2295170A2
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.)
Withdrawn
Application number
EP10012057A
Other languages
German (de)
English (en)
Other versions
EP2295170A3 (fr
Inventor
Albrecht 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 Siemag 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 Siemag AG filed Critical SMS Siemag AG
Priority claimed from EP06013599A external-priority patent/EP1743721A3/fr
Publication of EP2295170A2 publication Critical patent/EP2295170A2/fr
Publication of EP2295170A3 publication Critical patent/EP2295170A3/fr
Withdrawn legal-status Critical Current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

Definitions

  • Method and continuous casting apparatus for deforming a casting-warm strand of metal, in particular of steel or steel materials
  • 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 shrinking swamp is no longer fed from above at a certain distance (so-called critical distance). As a result of the smaller As the sump becomes soaring, it creates a suction that sucks out the carbon-enriched residual melt between the dendrites. The low-carbon dendrites persist. These then lead to voids and segregations.
  • 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 can initially be unaffected. 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.
  • 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 stated object is achieved in that the soft-reduction zone of several lengths of support roller segments or of formed individual strand guide rollers and changeable long, with individual strand guide rollers of these support roller segments in steps following the intended reduction in thickness 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 run partly empty or adjustable and rotationally driven are.
  • the reduction of the cross section shifts the position of the solidification 2b (sump tip) again in the strand running direction 16
  • the following special method is used ( Fig. 2 ):
  • 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, forming 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 the mold bath level 10 a of the continuous casting mold 10 ( Fig.1 ).
  • the reference quantity 6 can also be selected from the temperature distribution of the liquid sump 2 at the location of the critical shell distance 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 quantity 6 additionally has the temperature distribution is determined from the distance 12 of the solidification 2b or the sump tip 2b from the bath level 13 of the distribution vessel 14 ( Fig. 1 ).
  • the reference quantity 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 device 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Forging (AREA)
EP10012057A 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 Withdrawn EP2295170A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005030837.6A DE102005030837B4 (de) 2005-07-01 2005-07-01 Verfahren und Stranggießvorrichtung zum Verformen eines gießwarmen Stranges aus Metall, insbesondere aus Stahl oder Stahlwerkstoffen
EP06013599A 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

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP06013599.3 Division 2006-06-30

Publications (2)

Publication Number Publication Date
EP2295170A2 true EP2295170A2 (fr) 2011-03-16
EP2295170A3 EP2295170A3 (fr) 2012-07-04

Family

ID=37562400

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10012057A Withdrawn 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

Country Status (2)

Country Link
EP (1) EP2295170A3 (fr)
DE (1) DE102005030837B4 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2209574A4 (fr) * 2007-11-19 2012-02-01 Posco Brame coulée continue et son procédé de fabrication
CN113245518A (zh) * 2021-04-07 2021-08-13 中冶南方连铸技术工程有限责任公司 连铸坯的压下方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102233416B (zh) * 2010-04-28 2013-04-24 宝山钢铁股份有限公司 一种轻压下辊速控制方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO2002098587A2 (fr) * 2001-06-01 2002-12-12 Sms Demag Aktiengesellschaft Procede pour ajuster la reduction douce dynamique dans des machines de coulee continue
DE10236368A1 (de) 2002-02-22 2003-09-04 Sms Demag Ag Verfahren und Vorrichtung zum Stranggiessen und unmittelbaren Verformen eines Metall-, insbesondere eines Giessstrangs aus Stahlwerkstoffen
DE10236367A1 (de) 2002-08-08 2004-02-19 Sms Demag Ag Verfahren und Vorrichtung zum dynamischen Anstellen von einen Giessstrang aus Metall, insbesondere aus Stahl, beidseitig stützenden und/oder führenden Rollensegmenten

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN113245518A (zh) * 2021-04-07 2021-08-13 中冶南方连铸技术工程有限责任公司 连铸坯的压下方法
CN113245518B (zh) * 2021-04-07 2022-05-03 中冶南方连铸技术工程有限责任公司 连铸坯的压下方法

Also Published As

Publication number Publication date
DE102005030837A1 (de) 2007-01-11
DE102005030837B4 (de) 2024-04-04
EP2295170A3 (fr) 2012-07-04

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