EP1478479B1 - Procede de coulee continue et de faconnage direct d'un metal, notamment d'une barre de coulee en materiaux a base d'acier - Google Patents

Procede de coulee continue et de faconnage direct d'un metal, notamment d'une barre de coulee en materiaux a base d'acier Download PDF

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Publication number
EP1478479B1
EP1478479B1 EP03702564A EP03702564A EP1478479B1 EP 1478479 B1 EP1478479 B1 EP 1478479B1 EP 03702564 A EP03702564 A EP 03702564A EP 03702564 A EP03702564 A EP 03702564A EP 1478479 B1 EP1478479 B1 EP 1478479B1
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EP
European Patent Office
Prior art keywords
strand
shaping
strip
section
cross
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
EP03702564A
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German (de)
English (en)
Other versions
EP1478479A1 (fr
Inventor
Axel Weyer
Dirk Letzel
Horst Gärtner
Wilfried Milewski
Adolf Zajber
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
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SMS Demag AG
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Filing date
Publication date
Priority claimed from DE10236368A external-priority patent/DE10236368A1/de
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1478479A1 publication Critical patent/EP1478479A1/fr
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Publication of EP1478479B1 publication Critical patent/EP1478479B1/fr
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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
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
    • B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling

Definitions

  • the invention relates to a method for continuous casting and direct deformation of a metal, in particular a casting strand Steel materials, the rectangular, block, pre-profile, billet or round format has led to the continuous casting mold in a curved strand guide and secondarily cooled with liquid coolant and to a uniform temperature field prepared in the strand cross-section regulated for the deformation work is, wherein the casting strand by liquid coolant only in the Is cooled longitudinal sections, in which the casting strand in cross-section liquid is and the cast strand in a transition area before, in and / or behind one Bend-straightening unit by insulating the respective heat radiating Outside surface in the temperature is homogenized without liquid coolant.
  • EP-A-0 545 104 is independent of the other Requirement of crack suppression in the core of the cast strand and independently from a different heat dissipation in the sub-area "liquid" (heat dissipation with cooling water) and a uniform temperature field in the solidified Range (heat dissipation via heat radiation) no basis for a uniform Temperature picture described.
  • the object of the invention is the necessary temperature distribution to produce in the cast strand and thus to optimize the deformation work and at the end to achieve a useful structure of the Enderstarrung.
  • the stated object is achieved in that in the transition region a zone-wise heat radiation is made in such a way that the colder corner edges are less cooled and supported than others Cross-section parts connected to the still hot core area until the temperature field is formed from elliptical, horizontally lying isotherms and that the cast strand on a dynamically variable soft reduction section due to a measured over individual deformation rollers or roller segments Compressive strength, depending on the locally applicable compressive force, deformed becomes.
  • the advantages are a better preparatory process for the deformation process Casting or cooling process with a modified solidification or Temperature profile in the strand cross-section and a reduction process with continuous or variable reduction curve, which leads to a largely error-free Lead structure of the final solidification.
  • An advantageous differentiated condition is also still characterized created that the temperature image evenly in the transverse and longitudinal direction of the core region is formed in the strand cross-section.
  • the deformation on the deformation section can be based on two systems be carried out by deforming by spot pressing over single deformation rollers or by approximate surface pressing upper roller segments is made.
  • Another embodiment of the method consists in surface pressing in it, that when forming upper roll segments for different steel grades underschledliche Conicities applied when hiring the roll segments become.
  • control or Control the measurement and control of the deformation process to.
  • designated method provides for a regulation in such a way that several roller segments in normal position or with constant taper or be made with progressive conicity or with variable conicity what can be adjusted by the rules. After that, depending on the determined Deformation resistance to be deformed.
  • the continuous or variable reduction process is further submerged supports the compaction of the core region of the casting strand by capturing its deformation resistance and / or the strand path is regulated.
  • a shape-retaining supporting measure is that the cast strand, at least during the deformation by on both side surfaces supporting support rollers is supported and guided.
  • the instantaneous deformation rate on the particular temperature of the casting strand and / or on the Casting speed is adjusted by applying to the individual deformation rollers or at the individual roller segments of the deformation resistance continuously is measured and due to the respective Anstellkraft the location of Sump tip determines and the coolant volume, the adjusting force, the casting speed and / or the extension speed of the deformed casting strand be managed.
  • Fig. 1 is an example of a continuous casting apparatus for a billet strand format 1d of a cast strand 1 shown.
  • the strand cross section 1a could but also a rectangle, a block, a pre-profil or a round format be.
  • the liquid steel material is conveyed through a continuous casting mold 2 in a (curved) Strand guide 3 with liquid coolant 4, for example.
  • liquid coolant 4 for example.
  • Water cooled secondarily and regulated to a uniform temperature field 5 in the strand cross-section 1a set (see also Fig. 2). This creates a liquid cooled longitudinal section 6 with a solid shell and a liquid core portion 1c.
  • the casting strand 1 targeted surrounding serves, with the possible Insulation length in the longitudinal area indicated by arrows, depending on Strand format 1d, the dimensions, the casting speed u. Like. Parameters is obtained.
  • the dry area 24 may, for example, as drawn, the transition area 7 liquid / dry covering up to the bending-straightening unit 8 range with an upstream or downstream reduction section 9.
  • the reduction section 9 consists of individual, hydraulically adjustable deformation rollers 10 or from several hydraulically adjustable roller segments 11, as shown in Fig. 1 is visible.
  • the casting strand 1 becomes due to this improved temperature distribution a dynamically variable reduction section 9 and due to a via the individual deformation rollers 10 or one or more roller segments 11 measured compressive strength, depending on the locally applicable compressive force, deformed.
  • the temperature field 5 (Fig. 2) becomes uniform in the transverse and longitudinal directions 1e of the core region 1c formed in the strand cross-section 1a.
  • the casting strand 1 on the dynamically variable Reducüonssort 9 in the core area 1 c in the transverse and longitudinal direction 1e compressed ( Figures 4 and 5).
  • the deformation becomes dependent on the strand format 1d, the strand dimensions 14 and / or the respective casting speed made in the longitudinal direction 13.
  • the deformation can be through Line presses (Fig. 4) via individual deformation rollers 10 or by approximated Surface presses are made over several roller segments 11 ( Figure 5).
  • the core region 1 c in each case up to a sump tip 1 g
  • deformed over roller segments 11 can be used for different Steel grades different Konizticianen 15 by appropriate hiring the roller segments 11 are applied.
  • FIGS. 6 to 9 show such examples of different conicities 15
  • Fig. 6 shows the "normal position" 16 of the roller segments 11, i. the conicity is 0 °. Nevertheless, a compression takes place in Fig. 7 is a constant Conicity 17 set for all roller segments 11.
  • FIG. 8 shows Roller segment 11 to the next roller segment 11 a changing Konizticianswinkel in the sense of progressive conicity 18. It is also possible depending from the position of the sump tip 1g according to FIG. 9 a variable conicity 19 regulate.
  • the compaction of the core region 1 c (FIGS. 4 and 5) of the casting strand 1 via the Pressure cone 1h is first detected by detecting the relevant deformation resistance and / or a traveled strand path 20 (path detection) regulated. Particularly useful here is the formation of the temperature field 5 uniformly in the transverse and longitudinal directions 1e of the core region 1c. Thereby one obtains so-called optimized isotherms 12. The isotherms 12 run thereby especially flat.
  • the deformation resistance can, for example, under a single Deforming roller 10 by measuring the hydraulic pressure in a hydraulic line or another hydraulic component.
  • transverse direction 1e of the strand cross-section 1a are advantageous approximately horizontal layers 21, the same isotherms 12 on wise, compacted.
  • the core porosities can simultaneously existing segregations are eliminated.
  • Fig. 12B it is desirable to be during deformation arranged on both outer surfaces 1b adjacent support rollers 22, which has a width of the casting strand 1 on its outer surface 1 b do not allow.
  • the rate of Reduction process can be on (currently) 0 to 14 mm per meter Casting strand 1 can be adjusted and regulated.
  • the current Deformation rate is based on the respective temperature of the casting strand. 1 and / or to the (set) casting speed (eg 3.2 m / min) tuned.
  • the individual deformation rollers 10 or the individual Roller segments 11 of the deformation resistance eg. Via the hydraulic Pressure measured continuously.
  • the position of the sump tip 1g is determined and, for example, the volume of the sprayed coolant 4, the contact force, the casting speed and / or regulated the extension speed of the deformed casting strand 1, so that the Sump tip 1g to a desired position within the dynamic, variable reduction section 9 passes.
  • Each individual deformation roll can do this 10 or each roller segment 11 according to the conicity system 6 to 9 initially a standing in a fixed ratio deformation rate be assigned.
  • Fig. 10 are located in strand direction 23 next to one or more fixed bending-straightening units 8 a plurality of roller segments 11 on one common base plate 26.
  • the base plate 26 with the bending-straightening units 8 and the shown (four) roller segments 11 is limited in the range an altered position of the swamp tip 1g back and forth and displaceable accordingly connected to the scheme.
  • Each of the (six) reduction roller segments 11 is provided with at least two roller pairs 11a equipped.
  • At least one adjustable deformation roller 10 is equipped with a piston-cylinder unit 27.
  • the upper, adjustable deformation roller 10 or the upper, engageable roller segment 11th each arranged by means of two on a center line 28 in a row or in pairs outside the center line 28 arranged piston-cylinder units 27 provided.
  • roller pitch 29 ( Figures 4 and 5) on a roller segment 11 is considered to be narrow Division in the range of 200 to 450 mm selected with a roll diameter of 230 mm (roller segment 11) or 500 mm (single deformation roller 10).
  • a single roller segment 11 is for presented a stick format.
  • Fig. 13A is the drive 30 and the Roller pair 11a in normal position.
  • Fig. 13B the roller pair 11a and the Drive 30 shown in drive position
  • Fig. 13C the insulation 25 is in the range the reduction section 9 recognizable.

Claims (13)

  1. Procédé pour la coulée continue et le formage direct d'une barre métallique, en particulier d'une barre de coulée (1) constituée de matériau en acier, qui présente un format rectangulaire, de bloc, d'ébauche, de billette ou rond, qui est conduite après la lingotière (2) de coulée de barres dans un guide de barre recourbé (3) et refroidie de façon secondaire avec un réfrigérant liquide (4) et qui est préparée d'une façon réglée sur un champ (5) uniforme de températures dans la section de barre (1a) pour le processus de formage, la barre de coulée (1) étant refroidie seulement dans les sections longitudinales (6) par le réfrigérant liquide (4), dans lesquelles la barre de coulée (1) est liquide dans la section (1a) et la barre de coulée (1) dans une zone de transition (7) est rendue homogène devant, dans et/ou derrière une unité de redressement (8) par flexion, en l'isolant de la surface externe (1b) dégageant la chaleur respective, à la température sans réfrigérant liquide (4),
    caractérisé en ce que,
    dans la zone de transition (7) il se produit un dégagement de chaleur par zone de sorte que les bords angulaires (1f) plus froids sont moins refroidis et soutenus que d'autres pièces de section liées à la zone du coeur encore chaude (1c) jusqu'à ce que le champ (5) de températures soit formé d'isothermes (12) elliptiques se trouvant à l'horizontale et que la barre coulée (1) soit formée sur un tronçon de réduction (9), mou, dynamiquement variable, en raison d'une résistance à la compression mesurée par l'intermédiaire de rouleaux (10) individuels de formage ou de segments de rouleaux (11), indépendamment de la force de compression locale applicable.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    le thermogramme (5) est formé régulièrement dans la direction transversale et longitudinale (1e) de la zone du coeur (1c) dans la section de barre (1a).
  3. Procédé selon l'une quelconque des revendications 1 ou 2,
    caractérisé en ce que
    la barre de coulée (1) est comprimée sur le tronçon de réduction (9), dynamiquement variable, dans la zone du coeur (1c) dans la direction transversale et longitudinale (1e).
  4. Procédé selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    le formage est produit en fonction du format (1d) de la barre, des dimensions (14) de la barre et/ou de la vitesse de coulée.
  5. Procédé selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce que,
    le formage est produit à l'aide d'un pressage ponctuel sur des rouleaux individuels (10) ou bien à l'aide d'un pressage de surface approximatif sur des segments de rouleaux (11).
  6. Procédé selon la revendication 5,
    caractérisé en ce que,
    lors du formage par l'intermédiaire de segments de rouleau (11) des conicités différentes (15) pour différents matériaux d'acier sont appliquées lors du réglage des segments de rouleaux (11).
  7. Procédé selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que,
    plusieurs segments de rouleau (11) sont réglés dans la position normale (16) ou avec une conicité constante (17) ou avec une conicité progressive (18) ou avec une conicité variable (19).
  8. Procédé selon l'une quelconque des revendications 1 à 7,
    caractérisé en ce que,
    la compression de la zone du coeur (1c) de la barre de coulée (1) est réglée en détectant sa résistance à la déformation et/ou le chemin parcouru (20) par la barre.
  9. Procédé selon l'une quelconque des revendications 1 à 8,
    caractérisé en ce que,
    lors du formage, des couches approximativement horizontales (21) qui présentent des isothermes (12) identiques, sont comprimées dans la section de barre (1a).
  10. Procédé selon l'une quelconque des revendications 1 à 9,
    caractérisé en ce que,
    la barre de coulée (1) est soutenue et dirigée au moins pendant le formage à l'aide de rouleaux d'appui (22) adjacents sur les deux surfaces externes (1b).
  11. Procédé selon l'une quelconque des revendications 1 à 10,
    caractérisé en ce que,
    la vitesse du processus de réduction est réglé sur 0 à 14 mm/m.
  12. Procédé selon l'une quelconque des revendications 1 à 11,
    caractérisé en ce que,
    la vitesse de déformation momentanée est adaptée à la température respective de la barre de coulée (1) et/ou à la vitesse de coulée en mesurant en continu la résistance à la déformation au niveau des rouleaux individuels (10) de déformation ou au niveau des segments (11) de rouleau individuels et en déterminant sur la base de la force de serrage respective, la position de la pointe de fond de bain (1g) et en réglant le volume du réfrigérant, la force de serrage, la vitesse de coulée et/ou la vitesse de sortie de la barre de coulée déformée (1).
  13. Procédé selon la revendication 12,
    caractérisé en ce que,
    chaque vitesse de déformation se trouvant dans un rapport fixe est associée d'abord à chaque rouleau (10) de déformation ou à chaque segment (11) de rouleau.
EP03702564A 2002-02-22 2003-01-30 Procede de coulee continue et de faconnage direct d'un metal, notamment d'une barre de coulee en materiaux a base d'acier Expired - Lifetime EP1478479B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10207597 2002-02-22
DE10207597 2002-02-22
DE10236368 2002-08-08
DE10236368A DE10236368A1 (de) 2002-02-22 2002-08-08 Verfahren und Vorrichtung zum Stranggiessen und unmittelbaren Verformen eines Metall-, insbesondere eines Giessstrangs aus Stahlwerkstoffen
PCT/EP2003/000915 WO2003070399A1 (fr) 2002-02-22 2003-01-30 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

Publications (2)

Publication Number Publication Date
EP1478479A1 EP1478479A1 (fr) 2004-11-24
EP1478479B1 true EP1478479B1 (fr) 2005-12-14

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EP03702564A Expired - Lifetime EP1478479B1 (fr) 2002-02-22 2003-01-30 Procede de coulee continue et de faconnage direct d'un metal, notamment d'une barre de coulee en materiaux a base d'acier

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US (2) US7121323B2 (fr)
EP (1) EP1478479B1 (fr)
JP (1) JP4351068B2 (fr)
CN (1) CN1293966C (fr)
AT (1) ATE312675T1 (fr)
AU (1) AU2003205708A1 (fr)
CA (1) CA2470961C (fr)
DE (1) DE50301920D1 (fr)
ES (1) ES2254903T3 (fr)
RU (1) RU2302313C2 (fr)
WO (1) WO2003070399A1 (fr)

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AU2002344361A1 (en) * 2001-06-01 2002-12-16 Sms Demag Aktiengesellschaft Method for adjusting the dynamic soft reduction of continuous casting systems
RU2302313C2 (ru) * 2002-02-22 2007-07-10 Смс Демаг Акциенгезелльшафт Способ и устройство для непрерывной разливки с непосредственным обжатием металлической заготовки, в частности стальной заготовки

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RU2302313C2 (ru) 2007-07-10
JP2005526618A (ja) 2005-09-08
CN1293966C (zh) 2007-01-10
AU2003205708A1 (en) 2003-09-09
US20050011629A1 (en) 2005-01-20
CA2470961A1 (fr) 2003-08-28
ATE312675T1 (de) 2005-12-15
DE50301920D1 (de) 2006-01-19
US7121323B2 (en) 2006-10-17
EP1478479A1 (fr) 2004-11-24
WO2003070399A1 (fr) 2003-08-28
JP4351068B2 (ja) 2009-10-28
CA2470961C (fr) 2010-11-09
CN1635936A (zh) 2005-07-06
RU2004128254A (ru) 2005-04-20
US20070023161A1 (en) 2007-02-01
ES2254903T3 (es) 2006-06-16
US7849911B2 (en) 2010-12-14

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