EP3797006B1 - Installation de coulée et de laminage destinée au fonctionnement par lots et continu - Google Patents

Installation de coulée et de laminage destinée au fonctionnement par lots et continu Download PDF

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Publication number
EP3797006B1
EP3797006B1 EP19728590.1A EP19728590A EP3797006B1 EP 3797006 B1 EP3797006 B1 EP 3797006B1 EP 19728590 A EP19728590 A EP 19728590A EP 3797006 B1 EP3797006 B1 EP 3797006B1
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EP
European Patent Office
Prior art keywords
casting
plant
thin
rolling
strip
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EP19728590.1A
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German (de)
English (en)
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EP3797006A1 (fr
EP3797006C0 (fr
Inventor
Dieter Rosenthal
Christoph Klein
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SMS Group GmbH
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SMS Group GmbH
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Classifications

    • 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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • B21B1/24—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • 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
    • 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
    • B22D11/0408—Moulds for casting thin slabs
    • 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
    • B22D11/05—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds into moulds having adjustable walls
    • 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
    • B22D11/1213—Accessories for subsequent treating or working cast stock in situ for heating or insulating 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
    • B22D11/14—Plants for continuous casting
    • B22D11/142—Plants for continuous casting for curved casting
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/28—Normalising
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/08—Batch rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/10—Endless rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/04—Thickness, gauge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product

Definitions

  • the invention relates to a casting-rolling plant for producing a thin or ultra-thin strip, in particular hot strip, from a cast thin slab of steel in batch or continuous operation, comprising at least one casting plant for casting a thin slab, at least one continuous furnace arranged downstream of the at least one casting plant and at least seven rolling stands arranged downstream of the continuous furnace.
  • the invention further relates to a method for producing a thin or ultra-thin strip, in particular hot strip, from a cast thin slab of steel in batch or continuous operation, preferably by means of a casting-rolling plant as mentioned at the beginning.
  • Casting and rolling plants for producing a thin or ultra-thin strip, in particular hot strip, from a cast thin slab of steel are well known.
  • Cast thin slabs with different formats in terms of both their thickness and width, usually with a thickness of up to 60 mm and a width of up to 2,000 mm, are cast using the continuous casting process and then hot-rolled directly in a downstream rolling mill using the casting heat to produce thin or ultra-thin strips with a thickness of at least 0.8 mm.
  • strip thicknesses of around 1.2 mm can be easily produced in batch operation, whereby the cast strand can be separated after leaving the strand guide and then formed in the downstream rolling mill regardless of the casting speed, rolling down to strip thicknesses of less than 1.2 mm, especially less than 1.0 mm, is associated with difficulties in process control, since strips of such a thickness tend not to be able to be safely introduced into the roll gap and can then lead to interruptions in the rolling process due to so-called cobbling.
  • Thin strips or ultra-thin strips with a thickness of ⁇ 1.2 mm, in particular ⁇ 1.0 mm, are therefore usually rolled in continuous operation, in which the cast strand is not separated after leaving the casting plant and before entering the rolling plant, so that the casting speed has a direct influence on the downstream rolling process, in particular the maximum rolling speed that can be achieved here.
  • the final temperature above the austenite ⁇ ferrite transformation temperature is an essential process variable, several negative effects must be counteracted.
  • the rolling speed in continuous operation which is significantly reduced compared to batch operation, leads to lower forming speeds within the individual rolling stands and thus to a lower energy input into the formed strip.
  • the thin slab/strip to be rolled stays in the casting-rolling plant longer in continuous operation than in batch operation, associated with the inevitable heat losses.
  • continuous operation it has therefore been common practice to reheat the cooled steel before it enters a series of rolling stands in the rolling mill, in particular by using induction heating.
  • Casting and rolling plants for producing a thin or ultra-thin strip, in particular hot strip, from a pre-cast thin slab of steel are known to the person skilled in the art in a large number of ways, for example as so-called CSP or CEM plants, see for example EN 10 2008 020 412 A1 .
  • a casting-rolling plant for producing a thin or ultra-thin strip with a thickness of at least 0.8 mm to ⁇ 1.0 mm from a cast thin slab of steel in batch or continuous operation.
  • the casting plant is intended and set up to produce thin slabs with a minimum casting thickness of > 100 mm and a maximum thickness of 150 mm, preferably from > 100 mm to 140 mm and particularly preferably from > 100 mm to 130 mm with a casting width of at least 600 mm, in particular at least 1,000 mm and a casting speed of up to 7.0 m/min.
  • the casting systems provided for this purpose have casting molds which usually have adjustable long and/or wide sides in order to be able to cover the largest possible casting spectrum.
  • the long sides are spaced apart from one another by at least >100 mm to 150 mm, preferably >100 mm to 140 mm, particularly preferably >100 mm to 130 mm, in order to be able to cast the desired thin slab formats.
  • a casting plant can be provided upstream of one rolling mill, but it is also preferred if two parallel casting plants, each possibly provided with its own continuous furnace, are arranged upstream of a rolling mill.
  • the reason for this is that the capacity of the rolling mill is significantly higher than the capacity of a single casting plant, since the casting speed of a single casting plant depends essentially on the casting format and the steel grade to be cast.
  • two casting plants are often connected in parallel and feed a rolling mill together.
  • a continuous furnace is arranged downstream of the casting plant, preferably downstream of each casting plant, in order to homogenize the temperature of the cast thin slab and, if necessary, to be able to heat it to the required rolling temperature. It is essential to the invention that during the entire forming process from the thin slab to the desired final thickness of the thin or ultra-thin strip, in particular hot strip, no induction heating is provided for reheating the cast thin slab and/or the rolled strip.
  • This creates a casting-rolling plant that is able to roll cast thin slabs with a comparatively large casting thickness by means of at least seven rolling stands and rolling passes, preferably with eight rolling stands and corresponding rolling passes, without the need for inductive intermediate heating in both batch and continuous operation.
  • the particularly high casting thickness provides a plant that can be used without the need for inductive intermediate heating. can produce a wide range of steel grades down to a thin or ultra-thin strip thickness of 0.8 mm, especially in continuous operation.
  • LC Low Carbon
  • MC Medium Carbon
  • HC High Carbon
  • HSLA High Strength Low Alloy
  • DP Dual Phase
  • other multi-phase steels API (the commonly used American standard for pipe grades), Si grades (silicon grades such as electrical sheets), AHSS (Advanced High Strength Steel) and Corten (weatherproof structural steels) with a maximum thickness of 25.4 mm and a minimum of up to 0.8 mm safely, flexibly and cost-effectively up to an annual production capacity of 4.0 to 5.0 million tons per year (depending on the product mix).
  • the casting-rolling plant according to the invention is able to process even those steel grades that require a low casting speed, in particular this applies to the high carbon grades mentioned above, into thin or ultra-thin strips in continuous mode, since the mass flow from the casting plant, calculated as the product of casting speed (m/min.) and casting thickness (mm), is usually above a threshold value set for continuous operation.
  • such a threshold value is, for example, 650 mm x m/min., but can be set at, for example, 350 mm x m/min., preferably 500 mm x m/min., in a plant configuration with, for example, two roughing stands, a second continuous furnace arranged downstream of them and five, six or seven final rolling stands provided thereafter.
  • the final rolling temperature is above the austenite ⁇ ferrite transformation temperature so that a hot strip structure can be produced according to customer requirements. If the mass flow from the casting plant does not allow this or if there is no possibility of reheating using a continuous furnace after any roughing stands provided, rolling must be carried out in batch mode; otherwise, continuous operation can be carried out regularly, which in particular allows the reliable production of extremely thin strip thicknesses of less than 1.2 mm, in particular less than 1.0 mm.
  • the casting thicknesses according to the invention of >100 mm to 150 mm, preferably >100 mm to 130 mm, in particular >100 mm to 130 mm, are preferably cast into thin slabs at casting speeds of up to 7 m/min and then formed into thin strip or ultra-thin strip in a compact rolling mill.
  • the working roll diameter of the first rolling stands, preferably the first two rolling stands of the rolling mill is preferably more than 1,000 mm, in particular preferably 1,050 mm, whereby the first rolling stands, preferably the first two rolling stands, can apply a rolling force of a maximum of 35 mN/m at a rolling moment of a maximum of 4,000 kNm.
  • a shear for cutting off the leading strip beginning and optionally the strip end is arranged between the rolling stands, preferably after the second and before the third of the at least seven, preferably eight, rolling stands. This allows the strip beginning and optionally also the strip end, which can deform like a tongue, particularly during the first rolling passes, to be straightened, which enables a more reliable process control and a more reliable threading of the strip beginning into the further rolling stands.
  • the rolling stands of the rolling plants downstream of the casting plant or the casting plants can be divided into one or two roughing stands, in particular one or two roughing stands with a particularly high torque of at least 1,800 kNm, preferably at least 2,000 kNm, particularly preferably between 2,000 kNm and 3,400 kNm, and at least five, preferably six or seven, finishing stands, preferably finishing stands with a lower torque than the roughing stands.
  • the casting-rolling plant according to the invention has a cooling section, a shear, preferably a flying shear, and at least one reel downstream of the last rolling stand, so that the rolled hot strip can be safely cooled and wound into coils with a predefined weight.
  • a device for transferring a thin slab from the second casting plant into or behind the continuous furnace downstream of the first casting plant is provided.
  • a device can be, for example, a mobile furnace segment, but it is preferred to use two stationary furnace segments both in the continuous furnace downstream of the first casting plant and in the continuous furnace downstream of the second casting plant, wherein the stationary furnace segments are designed in such a way that they have roller table segments that can be pivoted towards one another and which consist of a can be pivoted from a rest position into a transfer position in alignment with one another in order to ensure the transfer of a thin slab from the continuous furnace downstream of the second casting plant to the continuous furnace downstream of the first casting plant and, if necessary, also back.
  • the casting and rolling plant according to the invention is intended and set up to produce a wide range of thin slabs with different thicknesses and different widths. It is preferred if the casting molds provided in the respective casting plants have adjustable width sides, the distance between which can be at least 900 mm, preferably at least 1,000 mm to 2,000 mm, particularly preferably 1,000 mm to 1,800 mm, from one another. This creates a casting plant with particularly simple means that is able to produce the desired range of thin slab widths without the need to replace one casting mold with another.
  • a method for producing a thin or ultra-thin strip with a thickness of at least 0.8 mm to ⁇ 1.0 mm from a cast thin slab of steel in batch or continuous operation with a casting-rolling plant, particularly preferably a casting-rolling plant according to the first aspect of the invention.
  • the casting-rolling plant comprises at least one casting plant and at least seven, preferably eight, rolling stands arranged downstream of the casting plant.
  • the method according to the invention comprises the steps of casting at least one thin slab with a casting thickness of 100 mm to 150 mm, preferably from 100 mm to 140 mm, particularly preferably from 100 mm to 130 mm, with a casting width of at least 600 mm, preferably at least 1,000 mm with a casting speed of up to 7.0 m/min, heating and/or homogenizing the temperature of the thin slab in a continuous furnace and rolling the heated and/or homogenized thin slab by means of at least seven, preferably eight rolling stands, to form a thin or ultra-thin strip, preferably hot strip, wherein the thin slab and/or the strip does not undergo any inductive heating during the process for producing the thin or ultra-thin strip.
  • the casting-rolling plant can be switched between batch operation and continuous operation depending on the mass flow of the casting plant, calculated as the product of the casting thickness (in mm) and the casting speed (in m/min.). It is particularly preferred if continuous operation is regularly set when a threshold value for the mass flow is exceeded, with this threshold value for the mass flow being particularly preferably set at 350 mm x m/min., preferably 500 mm x m/min., when the thin slab is formed into a thin or ultra-thin strip using one or two roughing stands and five to seven final stands with an intermediate continuous furnace.
  • a threshold value for the mass flow of 650 mm/m and min. is preferred in order to switch between batch operation and continuous operation.
  • Table 1 shows example tests for producing thin strips from different steel grades using a casting-rolling plant 1 according to the invention, here with a plant layout that has a casting plant, a downstream continuous furnace 7 and eight final rolling stands 9, 10, 14 - 19, followed by a cooling section 21 and two reels 25a, 25b.
  • a shear 13 is arranged to cut off the strip head after it leaves the second rolling stand 10 and to straighten the strip on the head side.
  • a steel of grade S315MC was cast at a withdrawal speed of 7.9 m/min. or 7.2 m/min. to form a thin slab with a thickness of 100 mm or 110 mm and a width of 1,200 mm. This thin slab was rolled in continuous operation into a thin strip with a thickness of 1.0 mm and a width of 1,200 mm.
  • the same steel grade was cast at a casting speed of 9.1 m/min. or 8.4 m/min. to form a thin slab with a thickness of 100 mm or 110 mm and a width of 1,550 mm and also rolled in continuous operation into a thin strip with a thickness of 1.3 mm and a width of 1,550 mm.
  • the mass flow was 700 to about 925 mm x m/min, thus above the threshold value for the use of continuous operation.
  • the final rolling temperatures were more than 900°C, thus significantly above the austenite ⁇ ferrite transformation temperature.
  • HDT580X steel was cast at casting speeds of 9.6 m/min. and 8.8 m/min. to form thin slabs with a thickness of 100 mm and 110 mm and a width of 1,200 mm.
  • the continuous forming operation resulted in a thin strip with a thickness of 1.2 mm and a width of 1,200 mm.
  • the same steel was cast at a casting speed of 11.5 m/min. and 10.7 m/min. to form a thin slab with a thickness of 100 mm and 110 mm and a width of 1,550 mm.
  • the mass flow was 960 to 1,180 mm xm/min., thus also significantly above the threshold value for continuous operation, the final rolling temperatures for the test series with the steel grade HDT580X were above 900°C.
  • steel of grade S315MC was cast into a thin slab with a thickness of 100 mm and a width of 1,200 mm.
  • a thin strip with a thickness of 2.30 mm was rolled from this.
  • a thin slab made of steel of grade S315MC was also cast with a thickness of 100 mm and a width of 1,550 mm and finally rolled in batch operation into a thin strip with a thickness of 2.80 mm.
  • HDT580X steel was cast into a thin slab with a thickness of 100 mm and a width of 1,200 mm or 1,550 mm and finally rolled into thin strip with a thickness of 2.75 mm or 3.50 mm in batch operation. Even in batch operation, the final rolling temperatures were above the austenite ---> ferrite transformation temperature in order to obtain a hot-rolled structure in the final rolled strip.
  • Figure 1 shows a casting-rolling plant 1 in a further plant layout according to the invention, wherein the casting-rolling plant 1 has two casting plants 2a, 2b with the respective casting molds 3a, 3b.
  • the solidified strand is cut using a pair of scissors 6a, 6b if batch operation is to be carried out on the casting-rolling plant 1 and then enters a continuous furnace 7a, 7b.
  • a device 8 is provided for transferring a slab (not shown) from the continuous furnace 7b into the continuous furnace 7a.
  • the slab After leaving the continuous furnace 7a, the slab enters a pair of roughing stands 9, 10 and is pre-rolled in these roughing stands 9, 10 to form a strip, which then enters another continuous furnace 11 and is reheated there.
  • the pre-rolled strip can be straightened at the head end by means of a shear 13 and then enters a series of final rolling stands 14 to 20.
  • the strip Upon leaving the last rolling stand 20, the strip has the desired final thickness and the desired final rolling temperature, after which the rolled strip is cooled in the cooling section 21 to the temperature required for coiling. Downstream of the cooling section 21, a high-speed shear 24 is provided, which is used when thin strip is rolled in endless mode. and in this case must be cut to the reel length without interrupting the casting-rolling process.
  • the rolled and possibly cut thin strip can then be reeled alternately onto two reels 25a, 25b in a flying change.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)

Claims (20)

  1. Installation de coulée-laminage (1) pour produire une bande mince ou ultra-mince d'une épaisseur d'au moins 0,8 mm à < 1,0 mm à partir d'une brame mince coulée en acier en mode batch ou continu, comprenant au moins une installation de coulée (2a, 2b) pour couler une brame mince avec une épaisseur de coulée de >100 mm à 150 mm, de préférence de >100 à 140 mm, particulièrement préférée de >100 mm à 130 mm, et une largeur de coulée d'au moins 600 mm, de préférence d'au moins 1000 mm, au moins un four de passage (7) disposé en aval de l'au moins une installation de coulée (2a, 2b) et au moins sept, de préférence huit, cages de laminoir (9, 10, 14-20) disposées en aval du four de passage (7), la ou les installations de coulée (2a, 2b) comprenant une lingotière (3a, 3b), dont les côtés longitudinaux sont espacés d'au moins >100 mm à 150 mm, de préférence >100 mm à 140 mm, de manière particulièrement préférée de >100 mm à 130 mm, l'une de l'autre, et l'installation de coulée-laminage (1) ne comprend pas de chauffage par induction pour le réchauffement de la brame mince coulée et pas de chauffage par induction pour le réchauffement de la bande laminée et l'installation de coulée-laminage est adaptée pour couler des brames minces à une vitesse de coulée allant jusqu'à 7 m/min.
  2. Installation de coulée-laminage (1) selon la revendication 1, caractérisée en ce qu'un ciseau (13) pour couper l'extrémité avant de la bande ainsi que, le cas échéant, l'extrémité arrière de la bande, est disposée entre les cages de laminoir (9, 10, 14-20), de préférence après la deuxième (210) et avant la troisième (14) des au moins sept, de préférence huit, cages de laminoir (9, 10, 14-20).
  3. Installation de coulée-laminage (1) selon l'une des revendications précédentes, caractérisée en ce que les cages de laminoir (9, 10, 14-20) comprennent au moins une, de préférence deux, cage(s) de pré-laminage (9, 10), un autre four de passage (11) disposé en aval de la ou des cage(s) de pré-laminage (9, 10) et au moins cinq, de préférence six ou sept, cages de laminage final (14-20) disposées en aval de l'autre four de passage (11), l'installation de coulée-laminage (1) ne comprenant pas de chauffage par induction pour le réchauffement de la brame mince coulée et/ou de la bande pré-laminée et/ou finie.
  4. Installation de coulée-laminage (1) selon l'une des revendications précédentes, caractérisée en ce qu'une ligne de refroidissement (21), un ciseau, (24), de préférence un ciseau à tambour, ainsi qu'au moins un enrouleur (25a, 26b) sont disposés en aval de la dernière cage de laminoir (20).
  5. Installation de coulée-laminage (1) selon l'une des revendications précédentes, caractérisée en ce qu'un ciseau (6), de préférence un ciseau pendulaire, est disposé entre la ou les installations de coulée (2a, 2b) et le four de passage (7) en amont des cages de laminoir (9, 10, 14-20).
  6. Installation de coulée-laminage (1) selon l'une des revendications précédentes, caractérisée en ce que deux installations de coulée (2a, 2b) sont prévues, chacune avec un ciseau pendulaire (6a, 6b).
  7. Installation de coulée-laminage (1) selon la revendication 6, caractérisée en ce qu'un four de passage propre (7a, 7b) est associé à chaque installation de coulée (2a, 2b), un dispositif (8) pour le transfert d'une brame mince de la deuxième installation de coulée (2b) dans ou derrière le four de passage (7a) en aval de la première installation de coulée (2a) étant prévu.
  8. Installation de coulée-laminage (1) selon la revendication 7, caractérisée en ce que le dispositif (8) pour le transfert comprend deux segments de four réglables l'un par rapport à l'autre, tant du four de passage (7a) en aval de la première installation de coulée (2a) que du four de passage (7b) en aval de la deuxième installation de coulée (2b).
  9. Installation de coulée-laminage (1) selon l'une des revendications précédentes, caractérisée en ce que les côtés larges de la ou des lingotières (3a, 3b) sont espacés d'au moins 900 mm, de préférence 1000 mm à 2000 mm, de manière particulièrement préférée 1000 mm à 1800 mm, l'un de l'autre.
  10. Installation de coulée-laminage (1) selon l'une des revendications 3 à 8, caractérisée en ce que le couple de l'au moins une cage de pré-laminage (9, 10) est d'au moins 1.800 kNm, de préférence d'au moins 2.000 kNm, particulièrement préféré entre 2.000 kNm et 3.400 kNm.
  11. Installation de coulée-laminage (1) selon la revendication 10, caractérisée en ce que le couple des au moins cinq cages de laminage final (14-20) est respectivement d'au moins 100 kNm, de préférence entre 100 kNm et 1.400 kNm.
  12. Procédé pour produire une bande mince ou ultra-mince d'une épaisseur d'au moins 0,8 mm à < 1,0 mm à partir d'une brame mince coulée en acier en mode batch ou continu avec une installation de coulée-laminage (1), comprenant au moins une installation de coulée (2a, 2b) et au moins sept, de préférence huit cages de laminoir (9, 10, 14-20), comprenant les étapes de coulée d'au moins une brame mince avec une épaisseur de coulée de >100 mm à 150 mm, de préférence de >100 mm à 140 mm, particulièrement préférée de >100 mm à 130 mm, et une largeur de coulée d'au moins 600 mm, de préférence d'au moins 1000 mm, et une vitesse de coulée allant jusqu'à 7 m/min, le chauffage et/ou l'homogénéisation de la température de la brame mince dans un four de passage (7a, 7b) et le laminage de la brame mince chauffée et/ou homogénéisée au moyen d'au moins sept, de préférence huit cages de laminoir (9, 10, 14-20) en une bande mince ou ultra-mince, la brame mince et la bande ne subissant pas de chauffage par induction pendant le procédé de production de la bande mince ou ultra-mince.
  13. Procédé selon la revendication 12, caractérisé en ce que l'extrémité avant de la bande ainsi que, le cas échéant, l'extrémité arrière de la bande sont coupées entre les cages de laminoir (9, 10, 14-20), de préférence après la deuxième (10) et avant la troisième (14) des au moins sept, de préférence huit, cages de laminoir (9, 10, 14-20).
  14. Procédé selon la revendication 12 ou 13, caractérisé en ce que le laminage de la brame mince comprend le pré-laminage de la brame mince chauffée et/ou homogénéisée au moyen d'au moins un, de préférence deux, cage(s) de pré-laminage (9, 10), le chauffage et/ou l'homogénéisation de la température de la brame mince pré-laminée/du bande dans un autre four de passage (11) ainsi que le laminage final de la brame mince pré-laminée/du bande au moyen d'au moins cinq, de préférence six ou sept, cages de laminage final (14-20) disposés en aval du autre four de passage (11) pour produire une bande mince ou ultra-mince.
  15. Procédé selon l'une des revendications 12 à 14, caractérisé en ce que l'installation de coulée-laminage (1) peut être commutée entre le fonctionnement par lots et le fonctionnement en continu en fonction du débit massique de l'installation de coulée (2a, 2b) en tant que produit de l'épaisseur de coulée (en mm) et de la vitesse de coulée (en m/min).
  16. Procédé selon la revendication 15, caractérisé en ce que l'installation de coulée-laminage (1) peut être exploitée en mode continu au-dessus d'une valeur seuil pour le débit massique de 350 (mm · m)/min., de préférence 500 (mm · m)/min.
  17. Procédé selon l'une des revendications 12 à 16, caractérisé en ce que la production annuelle de l'installation de coulée-laminage (1) se situe entre 4,0 et 5,0 millions de tonnes.
  18. Procédé selon l'une des revendications 12 à 17, caractérisé en ce qu'il est conçu pour produire une bande mince ou ultra-mince à partir d'aciers LC, MC, HC, HSLA, DP, APl, Si-grades, AHSS et Corten.
  19. Procédé selon l'une des revendications 12 à 18, caractérisé en ce que la température de laminage final dans le dernier laminoir (20) est réglée au-dessus de 820 °C.
  20. Procédé selon l'une des revendications 12 à 19, caractérisé en ce qu'il est mis en oeuvre au moyen d'une installation de coulée-laminage (1) selon l'une des revendications 1 à 11.
EP19728590.1A 2018-05-23 2019-05-23 Installation de coulée et de laminage destinée au fonctionnement par lots et continu Active EP3797006B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102018208122 2018-05-23
DE102019207459.6A DE102019207459A1 (de) 2018-05-23 2019-05-21 Gieß-Walzanlage für den Batch- und Endlosbetrieb
PCT/EP2019/063324 WO2019224305A1 (fr) 2018-05-23 2019-05-23 Installation de coulée et de laminage destinée au fonctionnement par lots et continu

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EP3797006A1 EP3797006A1 (fr) 2021-03-31
EP3797006B1 true EP3797006B1 (fr) 2024-07-17
EP3797006C0 EP3797006C0 (fr) 2024-07-17

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EP (1) EP3797006B1 (fr)
JP (1) JP2021524809A (fr)
CN (1) CN112218730B (fr)
DE (1) DE102019207459A1 (fr)
WO (1) WO2019224305A1 (fr)

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DE102021207943A1 (de) * 2021-07-23 2023-01-26 Sms Group Gmbh Verfahren zum Herstellen eines metallischen Bandes

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WO2019224305A1 (fr) 2019-11-28
DE102019207459A1 (de) 2019-11-28
EP3797006A1 (fr) 2021-03-31
US20210121924A1 (en) 2021-04-29
CN112218730B (zh) 2024-01-30
JP2021524809A (ja) 2021-09-16
EP3797006C0 (fr) 2024-07-17
CN112218730A (zh) 2021-01-12

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