EP1050355B1 - Procédé pour la production d'un produit en acier coulé en continu - Google Patents

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

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Publication number
EP1050355B1
EP1050355B1 EP00108747A EP00108747A EP1050355B1 EP 1050355 B1 EP1050355 B1 EP 1050355B1 EP 00108747 A EP00108747 A EP 00108747A EP 00108747 A EP00108747 A EP 00108747A EP 1050355 B1 EP1050355 B1 EP 1050355B1
Authority
EP
European Patent Office
Prior art keywords
rollers
pair
roller
liquid core
continuous casting
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.)
Expired - Lifetime
Application number
EP00108747A
Other languages
German (de)
English (en)
Other versions
EP1050355A3 (fr
EP1050355A2 (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 core of the cast product.
  • the continuously cast strand solidifies via the formation of a solid strand shell in the mold, and then solidifies in the direction of the strand center during the stripping process.
  • the electromagnetic stirring is known, wherein the melt is imposed a flow movement. Agitation in the secondary cooling zone or in the final zone of a continuous casting plant should bring about a globulitic solidification structure and reduce segregation.
  • the present invention has for its object to provide a process for the production of extruded products with homogeneous properties over the strand cross-section, in particular by preventing Seigerungen while increasing the core density. It is to be used in particular also in systems with high casting speeds and adapted to the final format casting formats.
  • the basic idea of the invention is a control method in which the strand extraction force is used as a controlled variable for adjusting the position of the sump tip in relation to the position of a roller pair performing the deformation and thus of the roller gap along the continuous casting track, in order to ensure that the sump tip is always directly in the Roller gap is, ie, that the strand solidifies directly in the area between the two rollers and thus during the deformation step.
  • the strand extraction force is a dependent on the predetermined contact force of the rollers, the deformation thickness and a material parameter size.
  • the setpoint is the pull-out force that results when the sump tip is directly in the roll nip.
  • the desired ratio between the sump tip position and roller gap can be adjusted in a first embodiment by changing the casting speed and in a second embodiment by changing the position of the roller pair on the strand.
  • the ratio between the sump tip position and the roller gap can be controlled both by the parameters of the casting speed and by the movability of the roller pair along the continuous casting track.
  • Figures 1 to 4 show various arrangements of the first and second embodiments of the device according to the invention.
  • a continuous casting apparatus 1 is shown very simplified, which essentially comprises 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 pull-out and straightening area 5 together.
  • the softreduction process is not carried out by means of a plurality of roller pairs or roller races, but only by a stationary pair of rollers 6, which is composed of an upper and lower roller 7, 8. Downstream of the pair of rollers 6 for reducing a pair of driver rollers 9 is arranged for straightening with an upper and lower drive roller 10 and 11.
  • the respective roller stands 12, 13 are shown greatly simplified.
  • a second roller pair 14 is arranged with a corresponding pair of drive rollers 15 before the first stationary on the continuous casting by means of changing the casting speed, the formation of the sump tip can be controlled in the strand and thus the goal can be achieved that the solidification of the strand always takes place in the gap between the pair of rollers, in order to achieve optimum core compaction and prevent core segregation.
  • the first or second pair of rollers can take over a softreduction of the sump tip, wherein the lower roller of the pair 20 is optionally present.
  • 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 pair of drive rollers 17 along the continuous casting track is movable. Such a change in position is illustrated with the pair of rollers 16 'and 17'. Downstream of the pair of rollers 16, a straightening region 18 is arranged, which 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 region 18. With 21 'the staggered pair of rollers is designated.
  • the travel is according to the invention in dependence of Strand extraction force controlled. It is also dependent on the casting speed. At low casting speed, a small travel path is sufficient (FIG. 3), and at a higher casting speed, the travel path becomes larger (FIG. 4).
  • the control method in combination with a pair of driver rollers 22 is shown schematically in FIG. 5.
  • a pair of rollers 23 are arranged on a continuous casting product having the initial thickness D 1 and the reduced thickness D 2 .
  • the pair of rollers is either set to a desired thickness or adjusted to spacers.
  • Both the upper and the lower roller 24, 25 of the softreduction rollers are adjustable in terms of their contact force P and their way, shown schematically here with 26.
  • the required force Z for pulling the strand is determined by means of the adjusting force P, the thickness difference and a material characteristic value and the necessary torque M d for the rollers 27, 28 of the downstream driver 22 calculates
  • the target value is the pull-out force, which results when the sump tip S or the solidification end is located directly in the gap of the two rollers 24, 25.
  • a correction of the positional relationship between the roller pair and the sump tip takes place either by changing the casting speed or by changing the position of the roller pair 23.
  • FIG. 6 illustrates the structure of such a softreduction framework in the side view.
  • the softreduction- and driver roller pair 23 and 22 are arranged in a common scaffolding frame 29
  • the displacement and force control of the roller pair 23 is taken over by two acting on the roller axes 30 and 31 hydraulic cylinders 32, 33, which is clear from the sectional view AA of Figure 7.
  • Designated at 34 is the extruded product, at 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 set by means of the two hydraulic cylinders 36 and 37 and 28 are each provided with drive means 38 and 39, the drive torque M d as a measure for the pull-Z is used.
  • the scaffolding frame 29 with softreduction- and driver roller pair 23 and 22 along the Strangg cashbahn be moved.
  • This is achieved according to Figure 9, preferably by means of wheels 40, 41, which are arranged on both sides of the scaffolding frame 29.
  • wheels 40, 41 which are arranged on both sides of the scaffolding frame 29.
  • rails 42, 43 along the continuous casting track, in which the wheels are movable in combination with the scaffolding frame.
  • FIGS. 10a and 10b it is made clear by presenting a roll with a diameter of 400 mm and a roll with a diameter of 1500 mm that a more controlled core compaction is possible with the aid of the relatively large rolls.
  • a larger pressed length and a smaller angle ⁇ mean a flatter angle of attack and thus a lower elongation at the solidification front in the strand core area and a longer reduction distance. This has an advantageous effect on a Kemverdichtung.
  • a satisfactory core compaction is possible with rolls with diameters between 400 and 1800 mm.
  • both blocks and billets can be subjected to softreduction, in particular profiled, rectangular, square or round strands can be compacted in the core.
  • the device described can be used in new systems, at the same time it is possible to retrofit existing systems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Claims (3)

  1. Procédé de fabrication d'un produit en acier coulé en continu, ce procédé comportant une étape de déformation du noyau liquide du produit de fonderie,
    caractérisé en ce que
    on définit comme valeur réelle la force d'extraction de coulée (Z), qui est obtenue dans l'intervalle de déformation d'une paire de rouleaux (23) réalisant l'étape de déformation en fonction de la force d'approche prédéterminée (P) des rouleaux, de l'épaisseur de déformation (ΔD) et d'une caractéristique de matière,
    que cette valeur réelle est comparée à une valeur théorique, la valeur théorique étant définie en tant que force d'extraction obtenue lorsque la pointe du cône liquide (S) se trouve directement dans l'intervalle entre les rouleaux et
    qu'en fonction de l'écart de la valeur réelle par rapport à la valeur théorique, on règle le rapport entre la position de la paire de rouleaux et de la pointe du cône liquide de manière à ce que la solidification ait lieu directement dans l'intervalle entre les rouleaux.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    la position de la pointe du cône liquide est réglée en fonction de la vitesse de coulée.
  3. Procédé selon la revendication 1,
    caractérisé en ce que
    la position de la paire de rouleaux est réglée en déplaçant la paire de rouleaux (23) le long de la bande de coulée continue.
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 EP1050355A2 (fr) 2000-11-08
EP1050355A3 EP1050355A3 (fr) 2001-03-28
EP1050355B1 true 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)

Families Citing this family (7)

* 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
IN2014DN08553A (fr) * 2012-05-24 2015-05-15 Nippon Steel & Sumitomo Metal Corp
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
US10618107B2 (en) 2016-04-14 2020-04-14 GM Global Technology Operations LLC Variable thickness continuous casting for tailor rolling
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

Family Cites Families (11)

* 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
PL170722B1 (pl) * 1991-09-12 1997-01-31 Giovanni Arvedi Sposób i urzadzenie do ciaglego odlewania stali PL
DE4138740A1 (de) * 1991-11-26 1993-05-27 Schloemann Siemag Ag Verfahren und vorrichtung zum stranggiessen von brammen oder bloecken
AT401744B (de) * 1993-10-14 1996-11-25 Voest Alpine Ind Anlagen Verfahren und anlage zum stranggiessen
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
DE19639297C2 (de) * 1996-09-25 2000-02-03 Schloemann Siemag Ag Verfahren und Vorrichtung für Hochgeschwindigkeits-Stranggießanlagen mit einer Strangdickenreduktion während der Erstarrung
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
GB9815798D0 (en) * 1997-09-18 1998-09-16 Kvaerner Metals Cont Casting Improvements in and relating to casting

Also Published As

Publication number Publication date
EP1050355A3 (fr) 2001-03-28
KR20000077170A (ko) 2000-12-26
CN1188234C (zh) 2005-02-09
CA2307817A1 (fr) 2000-11-07
CN1273148A (zh) 2000-11-15
DE19921296A1 (de) 2000-11-09
JP2000326060A (ja) 2000-11-28
ATE315449T1 (de) 2006-02-15
MXPA00004353A (es) 2002-03-12
KR100707785B1 (ko) 2007-04-13
EP1050355A2 (fr) 2000-11-08
BR0002396A (pt) 2001-01-02
DE50012037D1 (de) 2006-04-06

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