EP1050355A2 - Procédé et installation pour la production d'un produit en acier coulé en continu - Google Patents

Procédé et installation pour la production d'un produit en acier coulé en continu Download PDF

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Publication number
EP1050355A2
EP1050355A2 EP00108747A EP00108747A EP1050355A2 EP 1050355 A2 EP1050355 A2 EP 1050355A2 EP 00108747 A EP00108747 A EP 00108747A EP 00108747 A EP00108747 A EP 00108747A EP 1050355 A2 EP1050355 A2 EP 1050355A2
Authority
EP
European Patent Office
Prior art keywords
rollers
pair
strand
continuous casting
deformation
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
EP00108747A
Other languages
German (de)
English (en)
Other versions
EP1050355A3 (fr
EP1050355B1 (fr
Inventor
Horst Grothe
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 Schloemann Siemag AG
Schloemann 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 Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP1050355A2 publication Critical patent/EP1050355A2/fr
Publication of EP1050355A3 publication Critical patent/EP1050355A3/fr
Application granted granted Critical
Publication of EP1050355B1 publication Critical patent/EP1050355B1/fr
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
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1287—Rolls; Lubricating, cooling or heating rolls while in use
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • 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
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/14—Soft reduction

Definitions

  • the invention relates to a method for producing continuously cast Steel products, the method comprising a step of deforming the liquid Has core of the cast product. It also relates to a device for Continuous casting of steel, comprising a mold, means for guiding in an arc and support of the drawn strand as well as means running along the continuous casting track arranged and movable relative to each other to a small deformation of the cast product. Such a small deformation is also known as softreduction.
  • the continuously cast strand solidifies over the formation a fixed strand shell in the mold, then towards the middle of the strand solidify during the peeling process. This occurs on the solidification front to enrichment of alloying elements. These cause in solidified strand segregations, which in turn for inhomogeneities and uneven properties across the strand cross-section are responsible.
  • the electromagnetic is Stirring known, wherein a flow movement is imposed on the melt.
  • Stirring in the secondary cooling zone or in the final zone of a continuous caster is supposed to bring about a global solidification structure and core segregation Reduce.
  • the present invention has for its object a method and a To provide device for the production of strand products with homogeneous Properties across the strand cross-section, in particular by preventing Segregations while increasing the core density.
  • the procedure and the The device is intended, in particular, also in systems with high casting speeds and casting formats adapted to the final format are used.
  • the basic idea of the invention is a control method in which the strand pull-out force as a controlled variable for setting the position of the swamp tip in relation to the position of a pair of rollers performing the deformation and thus the Roller nip is used along the continuous casting line to achieve that the bottom of the sump is always directly in the roller gap, i.e. that the Strand directly in the area between the two roles and thus during the Deformation solidified.
  • the strand pull-out force is one of the specified ones Contact force of the rollers, the deformation thickness and a material characteristic dependent size.
  • the setpoint is the pull-out force that results when the swamp tip is directly in the roller gap.
  • the actual value from the setpoint can be the desired ratio between the top of the swamp and roller gap in a first embodiment by means of change the casting speed and in a second embodiment by means of change the position of the pair of rollers on the strand.
  • the relationship between the top of the swamp and the roller gap both by the parameters of the casting speed as well as the movability of the pair of rollers along the continuous casting track is adjustable.
  • the diameter of the rollers between 400 to 1800 mm.
  • large roller diameters in relation is in proportion to the usual diameters of driver rollers flat angle of attack and optimal soft reduction over the pressed length attainable and a change in the pull-out force can be recognized.
  • the depressed length with a flat angle of attack and at the same time large volume displacement sure that the volume reduction in the final solidification through Repulsion of the still liquid core is more than compensated.
  • the choice of large roll diameters means a large reduction in thickness of the strand possible with only one pair of rollers, which in practice Operating range can account for a reduction of 12 to 15 mm without Strand causing internal damage.
  • the stretch on the solidification front is low via a soft reduction setting. Determine the roll diameter the steepness of the soft reduction zone and thus the stretch limits and the degree of compaction.
  • a pair of driver rollers is arranged downstream of the pair of rollers, above whose torque the value of the strand pull-out force can be determined.
  • Figures 1 to 4 show different arrangements of the first and second Embodiment of the device according to the invention.
  • a continuous casting device 1 shown in a very simplified manner, which is essentially a mold 2 and an arcuate continuous casting track 3.
  • the continuous casting track 3 settles usually from a cooling area 4 and an adjoining one Pull-out and straightening area 5 together.
  • a stationary pair of rollers 6, which consists of an upper and lower roller 7, 8 is composed.
  • Downstream is behind that Pair of rollers 6 for reducing a pair of driver rollers 9 arranged for straightening an upper and lower driver roller 10 and 11.
  • the respective roller stands 12, 13 are shown in a highly simplified manner.
  • a first pair of rollers 6 and driver roller pair 9 is a second pair of rollers 14 with a corresponding pair of driver rollers 15 stationary in front of the first Continuous casting track arranged.
  • the casting speed can regulated the formation of the swamp tip in the strand and thus achieved the goal be that the solidification of the strand is always in the gap between the pair of rollers takes place in order to achieve optimal core compaction and core segregation to prevent.
  • the Bottom roller of the pair 20 is optionally available.
  • the second embodiment of the invention is illustrated by means of FIGS. 3 and 4. It is a pair of rollers 16, which together with a corresponding driver roller pair 17 can be moved along the continuous casting track. Such a change in position is illustrated by the pair of rollers 16 'or 17'. Downstream of the strand, a straightening region 18 is arranged behind the pair of rollers 16 is composed of two pairs of driver rollers 19 and 20.
  • FIG. 4 illustrates this embodiment with a movable pair of rollers 21, which is arranged behind the straightening area 18.
  • 21 ' is the offset pair of rollers designated.
  • the travel path is dependent on the Extraction force controlled. It also depends on the casting speed. With a low casting speed, a small travel path is sufficient (FIG. 3), at a higher casting speed, the travel distance becomes longer ( Figure 4).
  • the control method in combination with a pair of driver rollers 22 is shown schematically in FIG. 5.
  • a pair of rollers 23 is arranged on a continuous cast product with the initial thickness D 1 and the reduced thickness D 2 .
  • the pair of rolls is either set to a target thickness or placed on spacers.
  • Both the upper and lower rollers 24, 25 of the soft reduction rollers can be regulated with regard to their positioning force P and their path, shown schematically here with 26.
  • the force Z required to pull out the strand is determined by means of the setting force P, the thickness difference and a material characteristic value, and the torque M d required for the rollers 27, 28 of the downstream driver 22 is calculated.
  • the setpoint is the pull-out force that results when the sump tip S or the solidification end is located directly in the gap between the two rollers 24, 25. If there is a discrepancy between the actual value and the target value, the positional relationship between the pair of rollers and the bottom of the sump is corrected either by changing the casting speed or by changing the position of the pair of rollers 23.
  • FIG. 6 illustrates the structure of such a soft reduction framework in a side view.
  • the soft reduction and driver roller pair 23 and 22 are arranged in a common scaffold frame 29.
  • the path and force control of the pair of rollers 23 is taken over by two hydraulic cylinders 32, 33 acting on the roller axles 30 and 31, which is clear from the sectional view AA of FIG.
  • With 34 the continuous cast product is designated, with 35 the compressed core area between the two rollers 24 and 25.
  • FIG. 8 shows the sectional view BB of FIG. 6.
  • the two driver rollers 27, 28 are adjusted by means of the two hydraulic cylinders 36 and 37.
  • the rollers 27 and 28 are each provided with drive means 38 and 39, the drive torque M d serves as a measure of the pull-out force Z.
  • the scaffold frame 29 can be moved along the continuous casting path with a pair of soft reduction and driving roller 23 and 22. According to FIG. 9, this is preferably achieved by means of impellers 40, 41 which are arranged on both sides of the scaffolding frame 29. There are rails 42, 43 along the continuous casting track, in which the impellers can be moved in combination with the scaffold frame.
  • FIGS. 10a and 10b by showing a roller with a diameter of 400 mm and a roller with a diameter of 1500 mm, it is made clear that a more controlled core compaction is possible with the aid of the relatively large rollers.
  • a larger pressed length and a smaller angle ⁇ mean a flatter angle of attack and thus less elongation on the solidification front in the strand core area and a longer reduction distance. This has an advantageous effect on core compression.
  • a satisfactory core compaction is possible with rollers with diameters between 400 and 1800 mm.
  • both Blocks as well as billets are subjected to a soft reduction, in particular can compact profiled, rectangular, square or round strands in the core become.
  • the device described can be used in new systems, at the same time it is possible to retrofit existing systems.
EP00108747A 1999-05-07 2000-04-22 Procédé pour la production d'un produit en acier coulé en continu Expired - Lifetime EP1050355B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19921296 1999-05-07
DE19921296A DE19921296A1 (de) 1999-05-07 1999-05-07 Verfahren und Vorrichtung zum Herstellen von stranggegossenen Stahlerzeugnissen

Publications (3)

Publication Number Publication Date
EP1050355A2 true EP1050355A2 (fr) 2000-11-08
EP1050355A3 EP1050355A3 (fr) 2001-03-28
EP1050355B1 EP1050355B1 (fr) 2006-01-11

Family

ID=7907448

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00108747A Expired - Lifetime EP1050355B1 (fr) 1999-05-07 2000-04-22 Procédé pour la production d'un produit en acier coulé en continu

Country Status (9)

Country Link
EP (1) EP1050355B1 (fr)
JP (1) JP2000326060A (fr)
KR (1) KR100707785B1 (fr)
CN (1) CN1188234C (fr)
AT (1) ATE315449T1 (fr)
BR (1) BR0002396A (fr)
CA (1) CA2307817A1 (fr)
DE (2) DE19921296A1 (fr)
MX (1) MXPA00004353A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106232263A (zh) * 2014-05-14 2016-12-14 新日铁住金株式会社 铸坯的连续铸造方法
US10618107B2 (en) 2016-04-14 2020-04-14 GM Global Technology Operations LLC Variable thickness continuous casting for tailor rolling

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100518327B1 (ko) * 2002-12-23 2005-10-04 주식회사 포스코 쌍롤형 박판 주조장치에서의 초기 주조된 박판의 인발방법
JPWO2013175536A1 (ja) * 2012-05-24 2016-01-12 新日鐵住金株式会社 鋳片の連続鋳造方法
CN109622630B (zh) * 2019-01-03 2020-04-24 包头铝业有限公司 耐热铝合金杆材轧制工艺参数在线调节方法
CN110523937B (zh) * 2019-09-06 2021-07-23 首钢集团有限公司 一种压下方法及装置
CN112355262B (zh) * 2020-11-09 2021-10-15 湖南工程学院 一种用于板坯连铸动态轻压下的控制装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4138740A1 (de) * 1991-11-26 1993-05-27 Schloemann Siemag Ag Verfahren und vorrichtung zum stranggiessen von brammen oder bloecken
DE4436328A1 (de) * 1993-10-14 1995-04-20 Voest Alpine Ind Anlagen Verfahren und Anlage zum Stranggießen
EP0603330B1 (fr) * 1991-09-12 1996-04-03 ARVEDI, Giovanni Procede et appareil de fabrication de billettes et de blooms a partir d'acier coule en continu de haute ou d'excellente qualite
EP0834364A2 (fr) * 1996-09-25 1998-04-08 Sms Schloemann-Siemag Aktiengesellschaft Méthode et dispositif pour des machines de coulée continue à haute vitesse avec réduction d'épaisseur pendant la solidification
EP0903192A1 (fr) * 1997-09-18 1999-03-24 Kvaerner Metals Continuous Casting Limited Améliorations concernant la coulée

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56151147A (en) * 1980-04-24 1981-11-24 Nippon Steel Corp Method for detecting leading end position of unsolidified part of continuously cast ingot
JPS60257958A (ja) * 1984-06-05 1985-12-19 Sumitomo Metal Ind Ltd 連続鋳造の異常検出方法
CS267462B1 (en) * 1987-06-16 1990-02-12 Svoboda Rostislav Equipment for material's zone smelting
JPH0745096B2 (ja) * 1988-04-19 1995-05-17 住友金属工業株式会社 連続鋳造方法
JP3427546B2 (ja) * 1995-01-30 2003-07-22 大同特殊鋼株式会社 異鋼種連続鋳造方法
JP3119203B2 (ja) * 1997-06-27 2000-12-18 住友金属工業株式会社 鋳片の未凝固圧下方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0603330B1 (fr) * 1991-09-12 1996-04-03 ARVEDI, Giovanni Procede et appareil de fabrication de billettes et de blooms a partir d'acier coule en continu de haute ou d'excellente qualite
DE4138740A1 (de) * 1991-11-26 1993-05-27 Schloemann Siemag Ag Verfahren und vorrichtung zum stranggiessen von brammen oder bloecken
DE4436328A1 (de) * 1993-10-14 1995-04-20 Voest Alpine Ind Anlagen Verfahren und Anlage zum Stranggießen
EP0834364A2 (fr) * 1996-09-25 1998-04-08 Sms Schloemann-Siemag Aktiengesellschaft Méthode et dispositif pour des machines de coulée continue à haute vitesse avec réduction d'épaisseur pendant la solidification
EP0903192A1 (fr) * 1997-09-18 1999-03-24 Kvaerner Metals Continuous Casting Limited Améliorations concernant la coulée

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106232263A (zh) * 2014-05-14 2016-12-14 新日铁住金株式会社 铸坯的连续铸造方法
EP3144080A4 (fr) * 2014-05-14 2017-11-15 Nippon Steel & Sumitomo Metal Corporation Procédé de coulée continue de brame
US10076783B2 (en) 2014-05-14 2018-09-18 Nippon Steel & Sumitomo Metal Corporation Method for continuous-casting slab
CN106232263B (zh) * 2014-05-14 2019-01-18 新日铁住金株式会社 铸坯的连续铸造方法
US10183325B2 (en) 2014-05-14 2019-01-22 Nippon Steel & Sumitomo Metal Corporation Method for continuous-casting slab
US10189077B2 (en) 2014-05-14 2019-01-29 Nippon Steel & Sumitomo Metal Corporation Method for continuous-casting slab
US10207316B2 (en) 2014-05-14 2019-02-19 Nippon Steel & Sumitomo Metal Corporation Method for continuous-casting slab
EP3549695A1 (fr) * 2014-05-14 2019-10-09 Nippon Steel Corporation Procédé de coulage continu pour dalle
US10618107B2 (en) 2016-04-14 2020-04-14 GM Global Technology Operations LLC Variable thickness continuous casting for tailor rolling

Also Published As

Publication number Publication date
DE50012037D1 (de) 2006-04-06
ATE315449T1 (de) 2006-02-15
EP1050355A3 (fr) 2001-03-28
CN1273148A (zh) 2000-11-15
BR0002396A (pt) 2001-01-02
KR20000077170A (ko) 2000-12-26
JP2000326060A (ja) 2000-11-28
KR100707785B1 (ko) 2007-04-13
CA2307817A1 (fr) 2000-11-07
CN1188234C (zh) 2005-02-09
MXPA00004353A (es) 2002-03-12
DE19921296A1 (de) 2000-11-09
EP1050355B1 (fr) 2006-01-11

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