EP2893993B1 - Installation de tronçons de coulée et procédé de coulée d'une barre métallique - Google Patents

Installation de tronçons de coulée et procédé de coulée d'une barre métallique Download PDF

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Publication number
EP2893993B1
EP2893993B1 EP14195350.5A EP14195350A EP2893993B1 EP 2893993 B1 EP2893993 B1 EP 2893993B1 EP 14195350 A EP14195350 A EP 14195350A EP 2893993 B1 EP2893993 B1 EP 2893993B1
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EP
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Prior art keywords
curved part
mould
straightening
casting
angle
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EP14195350.5A
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German (de)
English (en)
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EP2893993A1 (fr
Inventor
Horst Von Wyl
Jörg BAUSCH
Lothar Fischer
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SMS Group GmbH
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SMS Group GmbH
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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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/043—Curved 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
    • 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
    • B22D11/14—Plants for continuous casting
    • B22D11/142—Plants for continuous casting for curved casting

Definitions

  • the invention relates to a method for the continuous casting of a metal strand according to the preamble of claim 1
  • Continuous casting plants are known from the literature which, with a casting thickness of greater than 100 mm, have a comparatively low overall height.
  • DE 32 36 284 C2 shows a continuous caster of the type of an oval arc continuous caster, in which a curved arc mold with a comparatively small radius of curvature, for example of 1.5 m, is provided.
  • This oval arch continuous caster has a machine height of less than 5.0 m, the casting thickness of the cast strand z. B. is 250 mm.
  • a large number of alignment points in the oval arc are required in order to straighten the cast metal strand before it enters the horizontally running part of the strand guide.
  • up to 19 alignment points are provided in the oval arch of the continuous caster according to this document.
  • the arc mold is arranged in such a way that its centerline lies on the horizontal radius of the casting curve and is therefore not turned into the casting curve.
  • EP 68 814 B1 shows a continuous caster of the oval arc type, wherein the mold is not curved, but is straight and accordingly has co-parallel broad sides.
  • the machine height of this continuous caster can be between 3.4 m and 5 m, the base radius in the curved part of the strand guide following the mold being 3 to 5 m and increasing continuously in the subsequent straightening zones.
  • the number of straightening points within the curved part of the strand guide is up to 15.
  • a disadvantage of this system is the comparatively high number of required straightening zones in connection with a separate bending device in order to convert the metal strand into an arc radius immediately after leaving the plane-parallel mold due to the relatively small base radius of the arc part of the strand guide.
  • a further disadvantage is that the metal strand is additionally formed because of the straight design of the mold before it enters the arcuate part of the strand guide.
  • EP 74 247 B1 shows a continuous caster of the oval arc type, in which a curved arc mold is provided.
  • the starting radius of the curved part of the strand guide is relatively small and is approximately between 3 and 5 m, which also corresponds to the machine height of this system.
  • a large number of roller segments are provided in the curved part of the strand guide for straightening the cast metal strand. The disadvantage is that these segments cannot easily be lifted up or removed from the strand guide.
  • EP 2 349 612 B1 shows a method and an apparatus for producing thick slabs of steel with a casting thickness exceeding 360 mm and a casting width exceeding 1000 mm in a continuous casting installation which is designed in the manner of a circular arc installation.
  • a curved arc mold is used, which lies on the horizontal with its centerline and so far has not been screwed down into the casting arch.
  • the disadvantage of this continuous caster is a comparatively large machine height, which is in the range between 9 and 15 m and is due to the design of the arcuate strand guide in the form of a circular arc.
  • a further disadvantage is a high ferrostatic pressure which acts on the metal strand after it has left the mold.
  • the design of a strand guide for continuous sheet casting systems is very closely linked to the temperature control between the first and last bending deformation of the steel strand produced on the one hand and the position of the ductility minima of the steel on the other.
  • the distance from the mold to the end of the straightening area in a circular arc system is at least equal to the product of the (smallest) casting radius with the factor ⁇ / 2. In a vertical turning system, it increases by the length of the vertical part. With multi-point bending and straightening, this distance increases with every further bending and / or straightening point.
  • the sequence of the partial sheets of the roll plan) and the desired minimum temperature at the tangential point it may be necessary to reduce the casting speed in order to allow the metal strand to flow into the horizontal without cracks. Conversely, given the casting performance and global geometry, it may be impossible to set the desired lower temperature limit at the tangential point.
  • DE 33 31 575 A1 shows a method and an apparatus for sheet metal continuous casting, wherein a sheet casting mold is arranged in an angular range of about 15 ° to about 30 ° below the horizontal and is rotated by this angular range in the arc part of the strand guide.
  • the continuous caster according to this document can be a circular arc system or an oval arc system. No exact details are given in which areas of the curved part of the strand guide a straightening of the cast metal strand takes place.
  • US 4,953,614 A discloses a continuous caster which comprises an arcuate strand guide in the form of a straightening module.
  • This straightening module encloses an angle of approximately 50 ° and has 4 straightening points.
  • the mold of this continuous caster is not rotated by an angle with respect to the horizontal, but is arranged at an angle of 0 °.
  • EP 1 103 321 A1 discloses a vertical bending continuous caster in which the mold lies with its centerline on the horizontal and is not rotated downwards into the casting sheet.
  • the arcuate area of a strand guide is formed on an arc.
  • DE 32 36 284 A1 discloses a continuous sheet casting machine in which a bending zone is in a range of 6% to 35% of the total length of the machine and the mold with its centerline lies on the horizontal.
  • DE 1 458 154 A1 shows a generic method for continuous casting of a metal strand, in which a continuous casting system is used with the features of the preamble of claim 1.
  • the invention has for its object to reduce the necessary installation effort in continuous casting with a sheet caster and at the same time to improve the resulting product quality of the metal strand.
  • a continuous casting installation which is used for casting a metal strand in a casting direction.
  • a continuous caster comprises a mold which is arranged rotated on an arc below the horizontal, in such a way that a center line or the center line of the mold forms a first angle with the horizontal.
  • the continuous casting installation comprises an arcuate strand guide in the form of an arc part downstream of the mold in the casting direction, in which the metal strand is guided with a strand guide arc radius, the arc part being designed in the form of an oval arc and an angle enclosed by the arc part being at least 66 °, a horizontal strand guide in the form of a horizontal part arranged downstream of the arch part in the casting direction, and a straightening zone provided in the arch part of the strand guide with at least one straightening point, the metal strand being straightened in the straightening zone by the strand guide arc radius.
  • the start of the straightening zone is at a distance from the center line of the mold on an arc at a second angle, the second angle being between 30 ° and 60 °.
  • the method according to the invention is characterized in that the first angle is greater than 0 °, so that the mold is screwed into the curved part of the strand guide, the first angle being up to 20 °, within the straightening zone the number of straightening points is between 7 and 20 that the straightening of the metal strand in the straightening zone takes place in a temperature range of its outer fiber that lies above the ductility minimum of the steel grade to be cast, and that the surface temperature of the metal strand at the tangential point lies above the secondary ductility minimum of the steel grade to be cast.
  • center line of the mold is to be understood as orthogonal according to the practice of continuous casting and in the sense of the present invention, which is directed at right angles to a broad side of the mold in a central section thereof. This applies in the same way to a curved arc mold as well as to a straight mold with plane-parallel broad sides.
  • the first angle which this center line of the mold includes with a horizontal line, defines the position of the mold by which it is arranged rotated downwards into the circular or pouring arc.
  • the invention is based on the essential finding that a shortening of the arc length of the arc part is achieved in that the mold is rotated downwards by the first angle. This contributes to a reduction in the plant height, which at the same time can reduce a ferrostatic pressure which acts on the cast metal strand.
  • the number of required alignment points in the curved part can be suitably influenced by the fact that the strand guide arc radius of the curved part immediately after the mold is not chosen too small and, for example, is chosen between 4.9 m and 9 m.
  • a straightening of the metal strand in the arch part without the risk of crack formation and without the disadvantage of excessive stresses on support rollers or the like is achieved in that the beginning of the straightening zone, viewed in the casting direction, is spaced apart from the center line of the mold on an arch by a second angle which is between 30 ° and 60 °. This ensures that the temperature of the metal strand at the start of straightening is sufficiently high on the one hand and on the other hand the metal strand has not yet solidified to such an extent that straightening or bending back into a straight line encounters impermissibly high resistances.
  • the mold can be designed in the form of an arc mold, preferably in such a way that a radius of curvature of the arc mold is between 4.9 m and 9 m.
  • the strand guide arc radius of the arc part is also preferably selected immediately following the arc mold in accordance with the radius of curvature of the arc mold.
  • a strand guide in the form of an oval arch is to be understood as one in which the radius of curvature is not constant, but rather increases in the direction seen in the casting direction. This has an advantageous effect on a reduced plant height of the continuous casting plant.
  • the mold is arranged in such a way that a casting level within the mold has a vertical distance from the horizontal part of the strand guide of between 5 m and 9 m and the system height of the continuous casting system is accordingly in this range of values.
  • the configuration of the arc part of the strand guide in the form of an oval arc also offers the advantage that, for example, in comparison to a circular arc system, more straightening points are possible, for example 3 to 5 more straightening points, in order to direct the metal strand back to a straight line.
  • the design of the arch part of the strand guide such that an angle enclosed by it is at least 66 ° leads to a minimum arch length of the arch part and ensures that the cast metal strand is cooled sufficiently long after leaving the mold and via a suitable number of straightening points can be directed back into a straight line or bent back.
  • first angle through which the mold is rotated downward into the curved part of the strand guide is greater than 0 ° ensures that the continuous casting installation has a reduced installation height.
  • the exact definition of the first angle is to be matched to a particular system and in individual cases, also taking into account the number of selected straightening points in the straightening zone of the curved part.
  • a continuous caster for carrying out a method according to the invention is particularly suitable for casting metal strands with a relatively large casting thickness, which can be at least 80 mm and preferably also between 110 mm and 700 mm. In principle, there are no upper limits to the casting thickness in the invention. Furthermore, the mold of the continuous casting plant is matched to the fact that a casting width is at least 500 mm, and is preferably chosen from a range between 800 mm and 4000 mm.
  • a plurality of support rollers are provided both in the arch part and in the horizontal part of the strand guide, preferably on both sides of the metal strand, i.e. H. on top and bottom of it.
  • These support rollers can be combined into individual segments, in particular in the straightening zone of the curved part, and optionally also in the horizontal part.
  • This enables a time-saving and therefore inexpensive replacement of a plurality of support rollers, namely in the form of a complete segment, for maintenance or repair purposes.
  • the strand guide arc radius in particular in the straightening zone of the arc part, is selected such that the support roller segments also extend upwards, ie. H. Let it lift out in the direction of the inner radius of the arc part. In this way, it is then possible to use cranes or the like, which can be attached to a hall ceiling or comparable scaffolding.
  • the number of support rollers on the inside of the arch part can be selected to be smaller in the straightening zone of the arch part than on the outside of the arch part. This makes it possible to arrange the support rollers, in particular on the inside of the arch part, with less effort, and, if appropriate, either to use larger bearings and / or to implement larger radius jumps within the straightening zone.
  • the costs of installation and in particular also during the life of the installation can be reduced if the segments of support rollers both in the curved part and in the Horizontal part of the strand guide are selected from the same segment type. This makes it possible to replace these segments in modules if maintenance or repair of support rollers is required.
  • a further simplification of the continuous casting installation and thus a reduction in costs is possible in that the support rollers are in each case without drive, at least in the area of the straightening zone or in other areas of the curved part. The support rollers in this area thus only fulfill a support or straightening function, a drive for rotating these support rollers being unnecessary.
  • a metallurgical length of a continuous casting installation is selected to be approximately the same size as compared to conventional installations.
  • the horizontal part of the strand guide is supplemented by at least one segment of support rollers, the length of which in the casting direction corresponds to at least a developed length of an angle curve, about which the mold is rotated with its center line from the horizontal by the first angle downwards.
  • the horizontal part of the strand guide is supplemented by the length that the curved part has been shortened by the first angle by rotating the mold downwards.
  • a length of the arch part with respect to a metallurgical length of the continuous casting installation fulfills the condition 1: 6 to 1: 1.5.
  • the metallurgical length of the system calculated from the meniscus inside the mold to the last supporting roller of the horizontal part, takes at least 1.5 times the length of the arch part and a maximum of 6 times this length.
  • the advantage of a reduced system height which has already been explained above, also goes hand in hand with the advantage that the one continuous casting installation with which a method according to the invention can be carried out requires less expenditure on the installation outlay on steel construction etc.
  • the reduced ferrostatic pressure which acts on the cast metal strand due to the lower plant height, also leads to the possibility that the plant can be designed with less rigidity, which also leads to cost advantages.
  • This is also accompanied by the advantage that, due to the reduced ferrostatic pressure, there is less bulging with respect to the cast metal strand, as a result of which the risk of crack formation is reduced and the formation of segregation is improved.
  • the arrangement of the mold rotated by the first angle results in advantageous damage minimization by the fact that steel melt dripping down only drips downward and does not drip into adjacent segments of the strand guide.
  • the arrangement of guide elements and / or collecting containers or the like is also advantageous, which can appropriately discharge or collect the liquid steel material accordingly.
  • Fig. 1 shows a continuous casting installation 100, in which a metal strand 1 after casting in a mold 10 is transferred into a strand guide which is provided in the casting direction G following the mold 10.
  • the mold 10 is designed as an arc mold and accordingly has a radius of curvature RK.
  • a center line 14 of the mold 10 which, as explained above, is to be understood as an orthogonal to a central region of a long side of the mold 10, includes a first angle ⁇ .
  • the first angle ⁇ can be between 0 ° and 20 °.
  • the strand guide is designed in the form of an arc, in the form of a so-called curved part 16.
  • This curved part 16 leads to a tangential point TP, from which the strand guide merges into a horizontal part 18.
  • a straightening zone 20 is provided in the curved part 16 and is explained in detail below.
  • a plurality of support rollers 22 arranged side by side in the casting direction G are provided, which lie opposite one another in pairs and thus contact the metal strand 1 from its top and bottom.
  • These support rollers 22 are combined into segments 24 in the curved part 16 and into segments 26 in the horizontal part 18. It can be provided here that at least one support roller 22 has a drive within each segment and is set in rotation accordingly in order to drive the metal strand 1 in the casting direction G.
  • the system height hA of the continuous caster 100 i.e. a vertical distance of the horizontal part 18 to the center line 14 of the mold 10 can be between 4.9 m and 9 m.
  • the arc part 16 has a strand guide arc radius RSt.
  • This strand guide arc radius RSt can expediently be selected to be the same size as the radius of curvature RK of the mold 10, for example to a value between 4.9 m and 9 m.
  • an arc length of the arc portion 16 from the meniscus within the mold 10 to the tangential point TP is marked with "BL”
  • a metallurgical length of the continuous caster 100 i.e. H.
  • ML a length from the meniscus within the mold 10 to the last support roller 22 within the horizontal part 18.
  • the arc part 16 comprises the straightening zone 20, in which a plurality of segments 24 with increasing radii R1-R5 are provided. Since the radius of segments 24 successive in the casting direction G increases in each case, the metal strand 1 is successively straightened as it passes through these segments 24 until it is completely straight after leaving the last segment 24, ie at the tangential point TP.
  • the segments 24 within the straightening zone 20 it can be assumed in a simplified manner that the straightening radius of all support rollers 22 within a respective segment 24 is selected to be the same size.
  • the straightening radius therefore only increases with a segment following in the casting direction G, with the relationship: R5>R4>R3>R2>R1> RSt.
  • a segment 24 or a support roller 22 with a specific straightening radius is to be understood as a straightening point.
  • the segments 24 with the straightening radii R1-R5 correspondingly result in five straightening points in the straightening zone 20.
  • the straightening radii can already be changed within a segment per support roller 22 and viewed in the casting direction G. increase. As a result, the number of guide points for the metal strand 1 is increased accordingly.
  • this angle is labeled " ⁇ 1 " and is approximately 30 °.
  • This second angle ⁇ thus defines the angular range of the curved part 16, starting from a position of the mold 10 and its center line 14, for straightening or bending back the metal strand 1.
  • the straightening zone 20 in the curved part 16 then extends from the first pair of support rollers 22 of the segment 24 with the straightening radius R1 to the last pair of support rollers 22 of the segment 24 with the straightening radius R5.
  • the beginning of the straightening zone can also only begin at segment 24 with the radius R2, ⁇ 2 assuming a value of approximately 40 °.
  • R1 would still correspond to the strand guide arc radius RSt, with an increase in the radius only starting at R2, for straightening the metal strand 1.
  • the second angle ⁇ it is also possible for the second angle ⁇ to assume a value of approximately 50 °, which in the Figure 1 is indicated by dashed lines in ⁇ 3 .
  • the straightening zone 20 would not begin until the segment 24 with the radius R3, the radii R1 and R2 of the previous segments 24 still corresponding to the strand guide bottom radius RSt.
  • the beginning of the straightening zone and / or a change in the straightening radius does not start at the beginning of a segment 24, but is also provided within a respective segment.
  • the support rollers 22 in the sheet part 16 can be designed to be drive-free. This simplifies the construction of the segments 24 and reduces the machine costs.
  • the support rollers 22 in the curved part 16 can also be formed without a drive, in the same way as in the embodiment of FIG Figure 2 .
  • Another difference compared to the embodiment of Figure 2 consists in the fact that the number of support rollers 22 on the inside of the arch part 16 is chosen to be smaller than on the outside of the arch part 16.
  • six support rollers 22 are provided on the inside of each segment 24 in the arch part 16, seven support rollers 22 being provided on the outside of the arc part 16 per segment 24.
  • the horizontal part 18 of the strand guide can be longer than in the exemplary embodiments according to FIG Figures 1-3 be formed, which is indicated by a broken line in the horizontal part 18.
  • the horizontal part 18 can also have a length, so that the condition 1: 1.5 to 1: 6 is fulfilled for a length of the arch part BL with respect to the metallurgical longitudinal ML.
  • the horizontal part 18 can be supplemented by at least one support roller segment 26, the length of which in the casting direction G corresponds to at least one developed length of the angle arc which the mold 10 is rotated with its center line 14 from the horizontal 12 downward by the first angle ⁇ .
  • a distributor trough carriage 28 is shown above the mold 10 and has an immersion tube 30 pointing in the direction of the mold 10.
  • the molten steel will introduced into the mold 10 by means of the dip tube 30.
  • the distributor trough carriage 28 can be moved by a third angle ⁇ on a circular arc with respect to the mold 10. This results in a displacement of the distributor trough carriage 28 relative to the mold 10 in the horizontal direction and in the vertical direction, as in FIG Figure 4 indicated by the arrows x and z and the dashed lines for the distribution trough car 28.
  • the wear of the immersion tube 30 can be optimized by an oscillation of the distributor trough carriage 28 due to the aforementioned movement along the circular arc by the angle ⁇ .
  • a guide element 32 in the form of a sheet, a wooden plate or a refractory material, Figure 4 can also be arranged between the mold 10 and a directly adjoining first segment 24 of the curved part 16.
  • the guide element 32 causes liquid steel to be drained off if the metal strand 1 breaks or the mold 10 overflows.
  • a collecting container (not shown) can also be provided in order to catch the liquid steel in the event of a break through.
  • a method according to the present invention now works as follows: After leaving the mold 10, the metal strand 1 is introduced downward into the curved part 16 of the strand guide, and straightened there in the straightening zone 20, before it enters the horizontal part 18 of the strand guide at the tangential point TP, now completely straight. Within the arch part 16, the metal strand 1 is also cooled at the same time by means of suitable (and not shown in the drawing) cooling devices.
  • the length BL of the curved part 16 is selected, as explained, by the positioning of the mold 10 rotated downward by the first angle ⁇ such that the ratio of the tension applied to the metal strand 1 and its ductility is optimally set. Due to the shortened arc length BL of the arc part 16 and the thus shortened running length of the metal strand 1 up to the tangential point TP, the outside temperature of the metal strand 1 increases there by approximately 50 ° C. to 100 ° C. The surface temperature of the metal strand 1 can be chosen such that it lies at the tangential point TP of the strand guide above the secondary ductility minimum of the steel grade to be cast.
  • this temperature increase is used to expand the range of castable steel grades, taking crack sensitivity into account, or to increase operational reliability when casting such sensitive steel grades.
  • This allows the distance to the secondary ductility minimum to be increased.
  • the straightening of the metal strand 1 takes place in a temperature range of its outer fiber which lies above the ductility minimum, as a result of which crack formation can be avoided.
  • the metal strand 1 therefore has relatively more heat content than in the prior art.
  • this has the consequence that the passage of a particle in the metal strand 1 through the so-called brittle zone becomes shorter the closer it is upstream. This further reduces the risk of internal cracking.
  • the beginning of the straightening zone 20 is spaced apart on an arc by the second angle ⁇ , namely with respect to the center line 14 of the mold 10, and thus the straightening of the metal strand 10 relatively close to the mold 10 or lies on the casting mirror.
  • a casting speed vG can be at least 0.15 m / min, preferably between 0.4 to 12 m / min, and more preferably less than 10 m / min.
  • segments 24 can also be saved as a result of its shortening.
  • the number of identical segments 26 in the horizontal part 18 can be increased, which consequently leads to a reduction in reserve segments to be kept and thus to cost savings.

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  • Mechanical Engineering (AREA)
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Claims (16)

  1. Procédé destiné à la coulée continue d'une barre métallique (1) avec une installation de coulée continue (100) qui sert à la coulée de la barre métallique (1) dans une direction de coulée (G) et qui présente :
    une lingotière (10) qui est disposée en rotation sur un arc de cercle en dessous de l'horizontale (12) d'une manière telle qu'une ligne médiane (14) de la lingotière (10) forme un premier angle inclus (α) avec l'horizontale (12) ;
    un guidage de barre de forme courbe monté à la suite de la lingotière (10) dans la direction de coulée (G) sous la forme d'une partie courbe (16), dans lequel la barre métallique (1) est guidée avec un rayon de courbure du guidage de barre (RSt) ; dans lequel la partie courbe (16) est réalisée sous la forme d'une courbe ovale et un angle inclus formé par la partie courbe (16) s'élève à au moins 66° ;
    un guidage de barre de forme horizontale monté à la suite de la partie courbe (16) dans la direction de coulée (G) sous la forme d'une partie horizontale (18), dans lequel le guidage de barre se transforme à un point de tangence (TP) de la partie courbe (16) pour devenir la partie horizontale (18) ;
    une zone de dressage (20) comprenant au moins un point de dressage prévue dans la partie courbe (16) du guidage de barre; dans lequel la barre métallique (1) est soumise à un dressage pour la rendre droite dans la zone de dressage (20) à partir du rayon de courbure du guidage de barre (RSt) ;
    dans lequel, lorsqu'on regarde dans la direction de coulée (G), le début de la zone de dressage (20) est situé à une certaine distance de la ligne médiane (14) de la lingotière (10) sur une courbe en formant un deuxième angle (β) ; dans lequel le deuxième angle (β) se situe entre 30° et 60° ;
    dans lequel le procédé est caractérisé
    en ce que le premier angle (α) est supérieur à 0°, d'une manière telle que la lingotière (10) pénètre par rotation dans la partie courbe (16) du guidage de barre ; dans lequel le premier angle (α) s'élève jusqu'à une valeur de 20° ;
    en ce que, au sein de la zone de dressage (20), le nombre de points de dressage se situe entre 7 et 20 ;
    en ce que le dressage de la barre métallique (1) dans la zone de dressage (20) a lieu dans une plage de températures de son brin externe, qui est située au-dessus du minimum de ductilité du produit en acier qui doit être soumis à une coulée ; et
    en ce que la température superficielle de la barre métallique (1) au point de tangence (TP) se situe au-dessus du minimum de ductilité secondaire du produit en acier qui doit être soumis à une coulée.
  2. Procédé selon la revendication 1, caractérisé en ce que la lingotière (10) est réalisée sous la forme d'une lingotière de forme courbe, de préférence en ce qu'un rayon de courbure (RK) de la lingotière de forme courbe se situe entre 4,9 m et 9 m.
  3. Procédé selon la revendication 2, caractérisé en ce que le rayon de courbure du guidage de barre (RSt) de la partie courbe (16) coïncide, directement au raccordement à la lingotière (10), avec le rayon de courbure (RK) de cette dernière.
  4. Procédé selon la revendication 1, caractérisé en ce que la lingotière (10) est réalisée sous la forme d'une lingotière de forme droite.
  5. Procédé selon la revendication 4, caractérisé en ce qu'un mécanisme de cintrage est disposé dans un ou avant la partie courbe (16), au moyen duquel la barre métallique (1) est soumise à un cintrage en conformité avec le rayon de courbure du guidage de barre (RSt) de la partie courbe (16).
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la lingotière (10) est disposée d'une manière telle qu'une hauteur d'installation (hA) se situe entre 5 m et 9 m.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la lingotière (10) et le guidage de barre qui est monté à la suite sont réalisés d'une manière telle que la barre métallique présente une largeur de coulée d'au moins 500 mm, et de préférence qui se situe entre 800 mm et 4000 mm et/ou une épaisseur de coulée d'au moins 80 mm, et de préférence qui se situe entre 110 mm et 700 mm.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la partie courbe (16) et la partie horizontale (18) comprennent respectivement une multitude de rouleaux de support (22) ; de préférence, en ce que les rouleaux de support (22) sont rassemblés, au moins dans la zone de dressage (20) de la partie courbe (16), en segments individuels (24) ; de manière plus préférée, en ce que, au sein d'un segment (24, 26), dans la direction de coulée (G), de 5 à 8, en particulier 6 ou 7 rouleaux de support (22) sont disposés dans des positions réciproquement limitrophes.
  9. Procédé selon la revendication 8, caractérisé en ce que, dans la zone de dressage (20) de la partie courbe (16), le nombre de rouleaux de support (22) du côté interne de la partie courbe (16) est inférieur au nombre de rouleaux du côté externe de la partie courbe (16).
  10. Procédé selon la revendication 8 ou 9, caractérisé en ce que les segments (24) dans la partie courbe (16) et/ou les segments (26) dans la partie horizontale (18) correspondent respectivement à un même type de segment.
  11. Procédé selon l'une quelconque des revendications 8 à 10, caractérisé en ce que, au sein d'un segment (24) dans la partie courbe (16), on prévoit une multitude de points de dressage.
  12. Procédé selon l'une quelconque des revendications 8 à 11, caractérisé en ce que la partie horizontale (18) est complétée par au moins un segment (26) de rouleaux de support (22) dont la longueur, dans la direction de coulée (G), correspond au moins à une longueur développée de la courbe angulaire selon laquelle la lingotière (10) est mis en rotation vers le bas avec sa ligne médiane (14) par rapport à l'horizontale en formant le premier angle (α).
  13. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une longueur (BL) de la partie courbe (16) satisfait à la condition 1:6 à 1:1,5, en ce qui concerne une longueur métallurgique (ML).
  14. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les rouleaux de support (22) sont exempts d'entraînement, au moins dans la partie correspondant à la zone de dressage (20) ou dans la zone correspondant à la partie courbe (16).
  15. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un chariot destiné à un panier de coulée (28) attribué à la lingotière (10) est mobile en direction verticale ; de préférence, en ce que le chariot destiné à un panier de coulée est mobile en formant un troisième angle (γ) au-dessus de la lingotière (10) en se déplaçant le long d'un arc de cercle adapté au rayon de courbure (RK) de la lingotière (10).
  16. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la vitesse de coulée (vG) s'élève à au moins 0,15 m/min ; de préférence, se situe entre 0,4 m/min et 12 m/min ; de manière plus préférée, est inférieure à 10 m/min.
EP14195350.5A 2013-11-29 2014-11-28 Installation de tronçons de coulée et procédé de coulée d'une barre métallique Active EP2893993B1 (fr)

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DE102017213647A1 (de) * 2017-03-29 2018-10-04 Sms Group Gmbh Stranggießanlage und Verfahren zu deren Betrieb

Citations (1)

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JPS58363A (ja) 1981-06-25 1983-01-05 Nippon Steel Corp 多点矯正彎曲型連続鋳造方法及び装置
JPS5850156A (ja) 1981-09-04 1983-03-24 Nippon Steel Corp 低機高、多点矯正彎曲型連続鋳造機
CH639013A5 (de) 1981-09-30 1983-10-31 Nippon Steel Corp Bogen-stranggussanlage.
DE3331575C2 (de) 1983-09-01 1986-07-31 Mannesmann AG, 4000 Düsseldorf Verfahren zum Bogenstranggießen von Metall, insbesondere von Stahl
US4953614A (en) * 1987-04-09 1990-09-04 Herbert Lemper Modular continuous caster
DE3839954A1 (de) * 1988-11-26 1990-05-31 Schloemann Siemag Ag Anlage zur herstellung von warmgewalztem stahlband
DE4316050C2 (de) * 1993-05-13 1998-02-12 Voest Alpine Ind Anlagen Dünnbrammen-Stranggießanlage
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AT406746B (de) * 1998-11-06 2000-08-25 Voest Alpine Ind Anlagen Verfahren zum stranggiessen von metall sowie stranggiessanlage hierzu
DE19956556A1 (de) * 1999-11-24 2001-05-31 Sms Demag Ag Radien-Konfiguration der Strangführung einer Vertikalabbiege-Stranggießanlage
DE102007032985A1 (de) * 2007-06-13 2008-12-18 Sms Demag Ag Verfahren und Vorrichtung zum Stranggießen eines Metallstranges
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