EP3308878B1 - Lingotière permettant la coulée continue de métaux - Google Patents

Lingotière permettant la coulée continue de métaux Download PDF

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Publication number
EP3308878B1
EP3308878B1 EP17195608.9A EP17195608A EP3308878B1 EP 3308878 B1 EP3308878 B1 EP 3308878B1 EP 17195608 A EP17195608 A EP 17195608A EP 3308878 B1 EP3308878 B1 EP 3308878B1
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EP
European Patent Office
Prior art keywords
mold
circular arc
side walls
cross
strand
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.)
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Application number
EP17195608.9A
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German (de)
English (en)
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EP3308878A1 (fr
Inventor
Heinz-Dieter RUMPLER
Klaus Von Eynatten
Sebastian MICHELIC
Bernhard Köller
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.)
Inteco Tbr Casting Technologies GmbH
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Inteco Tbr Casting Technologies GmbH
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Publication of EP3308878A1 publication Critical patent/EP3308878A1/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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0406—Moulds with special profile

Definitions

  • the invention relates to a mold for the continuous casting of metals according to the preamble of claim 1.
  • a mold with the features of the preamble of claim 1 is known from EP 1 547 705 B1 known.
  • the cross section of the known mold is characterized by corner regions having curved peripheral lines.
  • the shape of the circumferential lines changes continuously in the strand running direction or in the longitudinal direction of the mold and is in each case represented by a mathematical curve function
  • n
  • the circumferential lines of the cross-sectional areas of the known mold are characterized in that the circumferential lines have a curvature which increases in the circumferential direction of the respective circumferential line increases up to a local maximum and then decreases again.
  • the maximum degree of curvature of the circumferential lines (ie the maximum of the curvature) of the cross-sectional areas in the strand running direction decreases steadily or discontinuously at least over a partial area of the mold length.
  • the size of the cross section of the strand during solidification is reduced by the solidification process.
  • the cross section of the strand viewed in the strand direction on the one hand as constantly as possible abuts the mold wall, ie, that no gap between the strand and the mold occur, and on the other hand, the force exerted by the mold wall on the strand reaction or counterforce is as uniform and small as possible.
  • tapered molds are usually used for continuous casting, wherein the conicity of the mold manifests itself by the fact that the cross-sectional areas, which serve to guide or plant the strand on the mold, from an inlet region of the melt in the mold up to steadily reduce an exit area of the mold.
  • Particularly critical in this case are the corner areas at corners having cross-sectional shapes of the strand, since there the local heat dissipation differently from the heat dissipation between the corner regions arranged, is usually flat or slightly curved side surfaces.
  • the mold according to the invention for the continuous casting of metals with the features of claim 1 has the advantage that, with relatively simple manufacturability, a further improved quality of the continuous casting profile allows.
  • a further improved quality of the continuous casting profile is understood to mean improved shell growth and thus a more homogeneous quality in the edge region during passage of the strand through the mold, wherein the strand produced has increased resistance to bulging due to ferrostatic pressure and improved conditions for a possible Subsequent forming during casting, such as bending and / or straightening, but especially during the mechanical soft-reduction (MSR) as well as for further processing by rolling or forging offers.
  • MSR mechanical soft-reduction
  • the mold according to the invention makes it possible for cross-sectional areas to be used for all formats which are common in the production of long products, such as square billets, rectangular billets, double-T profiles and also for special casting-technically advantageous formats, such as X formats (which have not hitherto been known) Continuous casting can be produced) or 3-Kant similar formats, can be produced.
  • the mold in contrast to the aforementioned prior art, on corner regions in which the maximum of the curvatures of the cross-sectional areas between the inlet region and the outlet region of the mold is at least approximately constant.
  • the maximum of the curvatures of the cross-sectional areas between the inlet region and the outlet region of the mold is constant, but even slight deviations should be covered by the invention.
  • the shape of the cross-sectional areas approaches the natural shrinkage behavior of the cross-section of the continuous casting profile optimally, so that in the corner areas an optimized heat dissipation into the mold takes place.
  • the at least two circular-arc sections arranged on both sides of the first circular-arc section have either the same direction of curvature or a different direction of curvature.
  • the essential thing is merely that the choice of radii or arrangement of the individual circular arc sections is such that a harmonious course of the circumferential line is achieved in the corner, that is, that the slope of a tangent applied to the circumferential line has no cracks.
  • the side walls of the cross-sectional areas are formed as planar side walls.
  • Such a design makes it possible in particular to lead the strand after leaving the mold on a conveyor particularly simple and accurate, since the flat side surfaces (of the strand) serve as support surfaces of the strand, for example on cylindrical conveyor rollers, so that the strand on the conveyor rollers with a minimum surface pressure, which is also constant in the area of the side surfaces, can be promoted.
  • the width of the side surfaces in the strand direction either constant is, or decreases, preferably steadily.
  • the side wall As a preferred geometric dimensioning for the side wall, it has been found that its width should be between 60% and 80% with respect to the width of the strand cross-section.
  • the corner areas and the side surfaces is free from each other and only with regard to the expected strand shrinkage, it may be provided in that the side walls are set back relative to the corner areas with respect to the longitudinal axis or are displaced outwards.
  • a further optimization of the quality of the strand with regard to the shrinkage behavior of the strand taking place in strand direction is achieved if the conicity of the corner regions is greater, at least over a partial length, preferably over one third of the partial length of the mold on the side facing the inlet region is the taper of the side surfaces, with a factor of between 1.1 and 1.5 having been found to be advantageous.
  • the preferred taper between the side surfaces within the active mold length i.e., between the mold level and the mold exit
  • the conicity of the corner regions is partially independent of the conicity of the side walls.
  • a mold 10 for the continuous casting of metals in particular for the continuous casting of alloyed or unalloyed steels, greatly simplified.
  • the mold 10 is part of a continuous casting, not shown in detail, and is used to produce preferably long extruded profiles, which are supplied after passing through the mold 10 further processing steps to form their final shape or cross section.
  • the length of the mold 10 is typically between about 0.7m and about 1.0m.
  • the mold 10 has a longitudinal axis 11, which is formed in a straight line in the illustrated embodiment.
  • the Longitudinal axis 11 arcuate form.
  • the mold 10 has a in the FIGS. 2 and 3 recognizable inlet region 12 and an outlet region 13. In the inlet region 12, the liquid metal is introduced into the mold 10, wherein the pouring mirror, not shown, is typically arranged slightly below the inlet region 12, and in the outlet region 13, the at least partially solidified strand exits from the mold 10.
  • the mold 10 serves to form the cross section of the strand and the targeted cooling or solidification of the metal to achieve a homogenous and high quality of the strand, if possible over the cross section.
  • the mold 10 also has only in the Fig. 1 shown in sections, cooled mold wall 15, which typically has cooling holes or outside cooling channels 16 through which a liquid coolant (usually water) circulates to support the heat dissipation of the solidifying metal of the trainee strand through the mold wall 15 and in the Kokillenwand 15 dissipating heat in the coolant.
  • the mold 10 or the mold wall 15 is preferably made of copper or highly heat-conductive copper alloys such as CuAg 0.1 or CuCrZr.
  • the mold 10 or the mold wall 15 defines an inner cross-sectional area 20, in the region of which the initially liquid and subsequently solidifying metal is located.
  • the strand running direction is illustrated by an arrow 21 which extends from the inlet region 12 (casting mirror) in the direction of the outlet region 13 of the mold 10.
  • the individual cross-sectional areas 20 viewed in the direction of the longitudinal axis 11 are of different sizes.
  • the cross-sectional areas 20 between the inlet region 12 and the outlet region 13 are reduced steadily.
  • the circumferential lines 22, which limit the cross-sectional areas 20, viewed in the direction of the longitudinal axis 11 each formed approximately square.
  • the peripheral lines 22 form four corner regions 23, which merge into a respectively formed side wall 24 on both sides.
  • the side walls 24 each have a width b which is between 60% and 80% of the width B of the cross-sectional area 20.
  • the corner regions 23 are set back in the direction of the longitudinal axis 11, ie do not reach as far as an imaginary extension 25 of the side walls 24 in the corner regions 23.
  • the curved corner portion 23 is composed of three arc sections 31 to 33 together.
  • the (middle) circular arc section 32 has a first radius r 1 , wherein the second circular arc section 31 and the third circular arc section 33 adjoin the first circular arc section 32 on both sides.
  • the second circular arc section 31 has a radius r 2 and the third circular arc section 33 has a third radius r 3 .
  • the radii r 2 and r 3 can be made the same size.
  • the radius r 1 of the first circular arc section 32 smaller than the radius r 2 of the second circular arc portion 31 and smaller than the radius r 3 of the third circular arc portion 33.
  • the second circular arc portion 31 and the third circular arc portion 33 respectively connect one of the side walls 24 with the first arc portion 32.
  • the radii r 2 and r 3 The two circular arc sections 31 and 33 and the arrangement of their centers, from which they each emanate, are preferably each chosen such that there is a continuous, ie kink-free transition from the side wall 24 in the individual circular arc sections 31 to 33 towards another side wall 24 , ie, that the individual circular arc sections 31 to 33 cling to each other and to the side walls 24.
  • the distance of the respective center of the circle of the first circular arc portion 32 is designated by the longitudinal axis 11, from which the radius r 1 starts.
  • the position of the center of the radius r1 results from the desired Konizticiansverlauf between the circular arc sections 32 (diagonal conicity).
  • the position of the side walls 24 results from the desired Konizmaschinesverlauf between the side walls 24th
  • Fig. 2 Based on Fig. 2 is also apparent that the (planar) side walls 24 of the mold 10 are arranged conically to each other, such that their distance to the longitudinal axis 11 in line running direction (arrow 21) decreases linearly. Furthermore, based on the Fig. 3 It can be seen that the distances of the respective corner regions 23 in the direction of the strand running direction (arrow 21) steadily decrease, but the decrease is not linear, but viewed in the strand direction (arrow 21) in each case different, in the illustrated embodiment to a lesser extent compared to the side walls 24, so that the conicity of the corner regions 23 in strand running direction also decreases, in the upper region of the mold 10 more than in the lower region.
  • each cross-sectional area 20 between the inlet region 12 and the outlet region 13 of the mold 10 which is bounded by a peripheral line 22 and which is composed of a corner region 23 of the three circular arc sections 31 to 33, each having a first arc section 32 (with possibly different circular arc length) having a first radius r 1 , which is considered constant in the strand direction (arrow 21).
  • the radius r 2 or r 3 of the second circular arc portion 31 and the third circular arc portion 33 typically changes in the strand running direction (arrow 21) and depending on the taper of the side walls 24.
  • this means that the curvature K 1 / r of all the first circular arc sections 32 in the strand running direction (arrow 21) is the same size and larger than the curvature K in the region of the second circular arc section 31 and the third circular arc section 33.
  • the curvature K thus has a local maximum in the region of the first circular arc section 32 , wherein the curvature K of the circumferential line 22 in the corner region 23, starting from the first circular arc section 32 in the direction of the side surfaces 24 at least partially decreases steadily.
  • the cross section is shown by a mold 10a, the cross-sectional area 20a of the cross-sectional area 20 of the mold 10 according to the Fig. 1 characterized in that the two opposite side walls 36, 37 are arranged opposite the two other side walls 38, 39 in the direction of the longitudinal axis 11a reset. As a result, the corner regions 23a project beyond the side walls 36, 37.
  • the cross-sectional surfaces 20a also have four identically formed corner regions 23a, each of which is composed of a first circular arc section 32a with a radius r 1 , on both sides a second circular arc section 31a with a radius r 2 or a third circular arc section 33a with a radius r 3 followed. It is essential that the first circular arc portion 32a and the third circular arc portion 33a, which merges into the side walls 38 and 39, are curved in the same direction. On the other hand, the second circular arc portion 32a, which merges into the (recessed) side wall 36, 37, is curved in the other direction. However, the cross-sectional area 20a also has planar side walls 35 to 39 with the width b, which may be of different widths, just as the two radii r 2 and r 3 may be of different sizes.
  • FIG. 7 to 9 are further cross-sectional surfaces 20b to 20d shown, which serve to form substantially double-T-shaped or X-shaped strand cross-sections.
  • the cross-sectional surfaces 20b to 20d also each have four rectilinear or planar side walls 24b to 24d, the width b of which is of the same size, for example.
  • corner regions 23b to 23d which are likewise embodied identically in each case, are each composed of three circular arc sections 31b, 32b, 33b to 31d, 32d, 33d, wherein the first (central) circular arc section 32b, 32c, 32d each have the smallest radius r 1 in comparison with the radii r 2 and r 3 , and wherein the radius r 1 viewed in the strand direction (arrow 21) is equal to each other and with respect to the corner region 23 b to 23 d a local maximum represents.
  • the corner regions 23, 23a to 23d each have a first circular arc section whose curvature K is greater than that to the first circular arc section on both sides adjoining two circular arc sections, and wherein the curvature K of the first circular arc section viewed in the strand direction is always the same size.
  • the structural design of the mold 10, in particular its outer shape, depending on the requirements be designed differently and is not necessarily limited to tube molds, but also include block molds and molds in plate design.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Claims (13)

  1. Lingotière (10 ; 10a) pour la coulée continue de métaux, ayant une paroi de lingotière (15), ayant un axe longitudinal (11 ; 11a) formé rectiligne ou incurvé, la paroi de lingotière (15) délimitant des faces de section transversale (20 ; 20a à 20d) intérieures qui s'étendent perpendiculairement à l'axe longitudinal (11 ; 11a), ayant une zone d'entrée (12) et une zone de sortie (13), la direction d'avance de la barre allant de la zone d'entrée (12) vers la zone de sortie (13), les faces de section transversale (20 ; 20a à 20d) se diminuant constamment de la zone d'entrée (12) vers la zone de sortie (13), ayant des zones de coin (23 ; 23a à 23d) formées de manière arrondie, ayant des parois latérales (24 ; 24a à 24d ; 36 à 39) disposées entre les zones de coin (23 ; 23a à 23d), les zones de coin (23 ; 23a à 23d) ayant des lignes périphériques (22) incurvées, dont la courbure (K) a un maximum local à chaque fois, et la courbure (K) des lignes périphériques (22) diminuant constamment au moins par sections du maximum local vers les parois latérales (24 ; 24a à 24d ; 36 à 39), dans les zones de coin (23 ; 23a à 23d), le maximum des courbures (K) des faces de section transversale (20 ; 20a à 20d) est constant entre la zone d'entrée (12) et la zone de sortie (13), en ce que les lignes périphériques (22) sont formées par une première section d'arc circulaire (32 ; 32a à 32d) avec un premier rayon (r1) dans la zone du maximum de la courbure (K), en ce que les lignes périphériques (22) ont au moins une deuxième section d'arc circulaire (31 ; 31a à 31d) avec un deuxième rayon (r2) et au moins une troisième section d'arc circulaire (33 ; 33a à 33d) avec un troisième rayon (r3) entre la première section d'arc circulaire (32 ; 32a à 32d) et la paroi latérale (24 ; 24a à 24d ; 36 à 39) tournée vers elle, la deuxième et la troisième section d'arc circulaire (31 ; 31a à 31d, 33 ; 33a à 33d) jouxtant la première section d'arc circulaire (32 ; 32a à 32d) et la paroi latérale (24 ; 24a à 24d ; 36 à 39), et en ce que la distance entre la première section d'arc circulaire (32 ; 32a à 32d) et l'axe longitudinal (11 ; 11a) diminue constamment dans la direction d'avance de la barre.
  2. Lingotière selon la revendication 1,
    caractérisée en ce que
    le premier rayon (r1) se situe entre 10 mm et 45 mm, de préférence entre 15 mm et 30 mm.
  3. Lingotière selon la revendication 1 ou 2,
    caractérisée en ce que
    les au moins deux sections d'arc circulaire (31 ; 31a à 31d, 33 ; 33a à 33d) disposées des deux côtés de la première section d'arc circulaire (32 ; 32a à 32d) ont la même direction de courbure.
  4. Lingotière selon l'une quelconque des revendications 1 à 3, caractérisée en ce que
    les au moins deux sections d'arc circulaire (31 ; 31a à 31d, 33 ; 33a à 33d) disposées des deux côtés de la première section d'arc circulaire (32 ; 32a à 32d) ont des directions de courbure différente.
  5. Lingotière selon l'une quelconque des revendications 1 à 4, caractérisée en ce que
    les parois latérales (24 ; 24a à 24d ; 36 à 39) sont formées comme parois latérales (24 ; 24a à 24d ; 36 à 39) planes.
  6. Lingotière selon la revendication 5,
    caractérisée en ce que
    la largeur (b) des parois latérales (24 ; 24a à 24d ; 36 à 39) est constante dans la direction d'avance de la barre.
  7. Lingotière selon la revendication 5,
    caractérisée en ce que
    la largeur (b) des parois latérales (24 ; 24a à 24d ; 36 à 39) diminue, de préférence constamment, dans la direction d'avance de la barre.
  8. Lingotière selon l'une quelconque des revendications 1 à 7, caractérisée en ce que
    les parois latérales (24 ; 24a à 24d ; 36 à 39) sont disposées de manière conique les unes par rapport aux autres.
  9. Lingotière selon l'une quelconque des revendications 1 à 8, caractérisée en ce que
    la largeur (b) des parois latérales (24 ; 24a à 24d ; 36 à 39) se situe entre 60 % et 80 % de la largeur (B) de la section transversale de la barre.
  10. Lingotière selon l'une quelconque des revendications 1 à 9, caractérisée en ce que
    les parois latérales (24 ; 24a à 24d ; 36 à 39) sont disposées de manière décalée vers l'arrière ou de manière déplacée vers l'extérieur à l'égard des zones de coin (23 ; 23a à 23d) par rapport à l'axe longitudinal (11 ; 11a).
  11. Lingotière selon l'une quelconque des revendications 1 à 10, caractérisée en ce que
    la conicité des zones de coin (23 ; 23a à 23d), vue dans la direction d'avance de la barre, est, de préférence sur environ un tiers de la longueur partielle de la lingotière (10 ; 10a), supérieure sur le côté tourné vers la zone d'entrée (12) à la conicité des parois latérales (24 ; 24a à 24d ; 36 à 39), ou en ce que la conicité des zones de coin (23 ; 23a à 23d) est par sections indépendante de la conicité des parois latérales (24 ; 24a à 24d ; 36 à 39).
  12. Lingotière selon l'une quelconque des revendications 1 à 11, caractérisée en ce que
    les faces de section transversale (20 ; 20a) sont formées de manière rectangulaire.
  13. Lingotière selon l'une quelconque des revendications 1 à 11, caractérisée en ce que
    les faces de section transversale (20b ; 20c ; 20d) sont formées en forme de double T, de manière triangulaire ou en forme de X.
EP17195608.9A 2016-10-11 2017-10-10 Lingotière permettant la coulée continue de métaux Active EP3308878B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016119296.1A DE102016119296A1 (de) 2016-10-11 2016-10-11 Kokille zum Stranggießen von Metallen

Publications (2)

Publication Number Publication Date
EP3308878A1 EP3308878A1 (fr) 2018-04-18
EP3308878B1 true EP3308878B1 (fr) 2019-05-29

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EP17195608.9A Active EP3308878B1 (fr) 2016-10-11 2017-10-10 Lingotière permettant la coulée continue de métaux

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DE (1) DE102016119296A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017130930A1 (de) * 2017-12-21 2019-06-27 Inteco Melting And Casting Technologies Gmbh Verfahren und Vorrichtung zum Stranggießen von Metall
CN114178496B (zh) * 2021-11-26 2023-02-10 安徽马钢表面技术股份有限公司 一种用于重型h型钢结晶器的校弧装置及校弧方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1028300B (de) * 1956-11-12 1958-04-17 Olsson Erik Allan Kokille zum kontinuierlichen Giessen
EP0875312A1 (fr) * 1997-05-02 1998-11-04 Kvaerner Metals Continuous Casting Limited Améliorations liées à et concernant la coulée
JP2003170248A (ja) * 2001-12-06 2003-06-17 Kobe Steel Ltd 連続鋳造用鋳型および該鋳型を用いた鋼の連続鋳造方法
SI1547705T1 (sl) 2003-12-27 2008-08-31 Concast Ag Postopek kontinuirnega litja gredic in bloomov in votlina forme kokile za kontinuirno litje

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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Publication number Publication date
EP3308878A1 (fr) 2018-04-18
DE102016119296A1 (de) 2018-04-12

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