EP0625388B1 - Method for the controlled pre-rolling of thin slabs leaving a continuous casting plant, and relative device - Google Patents

Method for the controlled pre-rolling of thin slabs leaving a continuous casting plant, and relative device Download PDF

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Publication number
EP0625388B1
EP0625388B1 EP94102876A EP94102876A EP0625388B1 EP 0625388 B1 EP0625388 B1 EP 0625388B1 EP 94102876 A EP94102876 A EP 94102876A EP 94102876 A EP94102876 A EP 94102876A EP 0625388 B1 EP0625388 B1 EP 0625388B1
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EP
European Patent Office
Prior art keywords
rolling
slab
rolls
inclusive
control
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.)
Revoked
Application number
EP94102876A
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German (de)
English (en)
French (fr)
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EP0625388A1 (en
Inventor
Wogler Ruzza
Mirco Striuli
Alfredo Lavazza
Andrea Carboni
Giovanni Coassin
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.)
Danieli and C Officine Meccaniche SpA
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Danieli and C Officine Meccaniche SpA
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Publication of EP0625388A1 publication Critical patent/EP0625388A1/en
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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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0602—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a casting wheel and belt, e.g. Properzi-process
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations

Definitions

  • This invention concerns a method and a device for the controlled pre-rolling of thin slabs leaving a continuous casting plant, and the relative device.
  • this invention concerns a method and relative device for controlled pre-rolling, carried out on thin slabs leaving a mold for the continuous casting of thin slabs, immediately downstream of the foot rolls of that mold and concerns also the device suitable to apply that method.
  • thin slabs are meant slabs 800 to 2500 mm. wide, or more, and 25 to 90 mm. thick.
  • the invention is applied advantageously, but not only, to slabs having a final thickness between 30 and 60 mm. at the outlet of the continuous casting machine.
  • the invention can also be applied to the continuous casting of billets, whether the billets be round, square, rectangular, etc.
  • the invention can be applied to straight and curved continuous casting plants.
  • Pre-rolling methods are known whereby a thin slab undergoes a pre-rolling action in a zone distant from the foot rolls.
  • the skin of one side of the slab is connected to the skin of the other side by columnar solidification elements at an intermediate position between the edges; both the edges, which contain a consistent solidified thickness, and also the columnar solidification elements offer a strong resistance to any alteration of the thickness of the slab.
  • the pre-rolling as carried out in the methods of the state of the art has only the purpose of performing a marginal superficial work, and the real work of reducing the thickness of the slab is entrusted to the rolling train located downstream.
  • Pre-rolling assemblies are also known which comprise mechanical adjustment systems together with pre-adjustment at the beginning of a casting campaign. These assemblies are associated with pre-rolling rolls in continuous rows or divided into sectors or groups of rolls or else with assemblies of pressure belts.
  • the state of the art prevents controlled mechanical action to reduce the length of the liquid cone and thus to ensure better quality.
  • the purpose of this invention is to achieve a controlled pre-rolling or soft reduction of the slab leaving the crystallizer so as to produce a slab of a smaller thickness at the end of the casting machine.
  • the main advantages of the controlled pre-rolling, or soft reduction, or reduction with a liquid core or pool are essentially two; the first advantage is to be able to produce at the outlet of the casting machine a slab of a slender thickness (30-60 mm.) by using a crystallizer having a greater thickness, that is to say, the short side of the lengthwise through passage of the crystallizer has a greater width than the finished thickness of the slab after the controlled pre-rolling.
  • This controlled pre-rolling improves the fluid-dynamic behaviour of the liquid metal in the crystallizer of the mold; it also improves the life of the submerged nozzle assembled on the tundish and improves the behaviour during melting of the powders which are placed above the upper part of the liquid metal in the mold.
  • the second advantage is the achievement of a refining of the structure of solidification of the metal and the elimination of the central segregation in the slab.
  • the soft reduction if it is to be effective, has to take place with a continuous controlled reduction of the thickness of the slab, and this can be achieved with a substantially conical conformation of the segment of slab undergoing the soft reduction.
  • This conical segment can have a length ranging from about 0.8 to 7 meters, preferably 3.8 meters to 6.3 meters; the greater length corresponds to the end of the containing zone produced by the containing rolls included downstream of the crystallizer and after the foot rolls.
  • the solidification takes place in a substantially different manner with different types of steel; steels with a low content of carbon (C less than 0.10%) have a solidification characterised by short columnar grains and the solidification face moves forward in a compact condition without great discontinuities and with a short two-phase zone.
  • the liquid is pumped in the opposite direction from the centre line to the cavities between the dendrites.
  • This alternating pumping effect creates islands of positive and negative segregation at the centre line of the slab.
  • the compression has to take place in such a way that the two solidification faces penetrate into each other with different degrees according to the type of steel.
  • the reduction to be carried out is 20 mm. (50 - 30).
  • the pre-rolling method therefore consists in a model of ON LINE solidification which determines the exact profile of solidification of the slab on the basis of the current casting conditions.
  • This model calculates the length of the pre-rolling - Lsr - that is to say, the position along the machine where a desired solid fraction exists at a depth from the surface equal to the half-thickness of the slab to be produced.
  • the conical segment of the reduction is adjusted by rolling in such a way as to have a gradient of reduction - Gsr - such as will bring the end of the reduction to the calculated pre-rolling length Lsr.
  • a further purpose of the pre-rolling method according to the invention is to speed up the formation of crystals and therefore the formation of stable columnar connections between the skin of one side and the skin of the other side of the slab.
  • these columnar connections are formed in a compressed environment owing to the pre-rolling action exerted by the pre-rolling assembly, so that these connections are produced already compacted with a typical arrangement.
  • the invention By carrying out a dynamic control of the length of the liquid cone or pool as a function of the main casting parameters (speed, superheating in the tundish, secondary cooling downstream of the mold and steel grade), the invention also enables the transient periods of starting and stopping (at the end of casting or owing to an accident) to be optimized and the scrap to be reduced.
  • the method according to the invention makes possible the casting in a mold of a slab having a section of a greater thickness than the final one with all the advantages in terms of surface quality arising from optimization of the working conditions of the lubricating powder (greater melting surface, regularity of the covering of the powders on the liquid steel), of superheating of the steel and of downflow in the mold (with less turbulence and greater stability of the meniscus), and also makes possible the use of a submerged nozzle having a greater cross-section and therefore more longlasting.
  • This pre-rolling method enables the outgoing cross-section of the slab to be reduced so as to be able to reach smaller final thicknesses, given an equal number of rolling units.
  • the pre-rolling rolls positioned on the outer curved side of the plant, in the event of continuous curved casting, can be associated with load cells, which control the pressure which those rolls exert on the thin slab.
  • the pre-rolling rolls positioned on the inner curved side of the plant are associated with a hydraulic capsule, for instance of the type disclosed in EP-0444420, and may also be associated with load cells as an alternative to those envisaged for the rolls on the outer curved side.
  • a pressure transducer is included on each hydraulic capsule and enables the rolling pressure to be controlled.
  • each pre-rolling assembly includes a stationary portion and a displaceable portion.
  • This description assumes as an example that the outer curved side contains stationary rolls while the displaceable rolls form the inner curved side, but in practice the two sides can also be inverted.
  • the inner and outer curved sides may include a stationary portion and a displaceable portion, which cooperate with a displaceable portion and a stationary portion of the opposite side respectively.
  • each pair of rolls is associated with a single position transducer, which monitors the distance between the opposed rolls.
  • each group of pairs of rolls forming a pre-rolling assembly includes two transducers monitoring the position of that assembly, these transducers being located respectively at the upstream and downstream ends of that pre-rolling assembly and monitoring the distance between the opposed rolls at those positions.
  • each pair of rolls is also associated with a single position transducer.
  • this passage may have its sides parallel or converging, depending on the particular requirements.
  • each pair of rolls is associated with a single position transducer, it is possible to determine a pre-rolling passage having a lengthwise section of any particular form by positioning each roll of each pair of rolls as required.
  • the whole system is governed by a pre-rolling control and data processing unit, which receives signals from the pressure transducers and position transducers, whether single or belonging to assemblies, and also from monitors of the speed of the slab, from monitors of the secondary cooling parameters and from monitors of the temperature of the cast molten metal and of the temperature of the thin slab leaving the mold.
  • thermosensors may also be included which monitor the temperature of the slab at intermediate positions in the area where the pre-rolling assembly according to the invention is working, and which send signals to the pre-rolling control and data processing unit.
  • a monitor possibly of a sonar type for instance, may be included to identify the presence or absence of a liquid pool within the slab and thus to ensure correctly the actual closure of the liquid cone or pool in the pre-rolling assembly according to the invention.
  • control and data processing unit which may be connected to or form part of other general control and data processing units, processes all these parameters and compares them with the pre-rolling parameters fed into or contained in appropriate internal files and provides the pairs of rolls with optimum adjustment values.
  • the control and data processing unit may also be connected to an auxiliary data collection unit, which, besides recording all the values provided by the monitors, feeds them to a data bank able to display and/or print the progress of the values over a period of time.
  • rolls are meant rolls positioned in continuous rows or divided into sectors, or else belts, etc., thus covering any system of the state of the art.
  • the adjustments which are carried out with the method according to the invention are adjustments of single rolls, or of one assembly of rolls at a time followed by another assembly and so on, or general adjustments of the whole pre-rolling assembly.
  • the adjustments may be added algebraically.
  • the pre-rolling method according to the invention enables a reduction of the thickness of the slab by between about 10% and 50% to be achieved. This reduction of the thickness is obtained in a travel between 0.8 and 7 meters long, but advantageously between 1.2 and 1.8 meters long.
  • the reduction of the thickness of the slab may be progressive with constant values.
  • the reduction of the thickness of the slab is carried out in steps, with a final finishing segment in which the reduction of thickness is progressive.
  • means for the secondary cooling of the slab are associated with the pre-rolling assembly according to the invention and consist, for instance, of a plurality of sprayer nozzles.
  • Both the rate of flow and the delivery pressure of the sprayer nozzles are adjusted advantageously by the data processing and control unit and/or by the general data processing and control unit, thus ensuring a continuous control of the condition of the slab.
  • the regulation of the sprayer nozzles may be governed by possible monitors of the temperature of the slab, these monitors being arranged along the pre-rolling assembly.
  • At least one descaling unit of the type shown in patent application EP-93110927.6 filed in the name of the present applicant, for instance, may be associated with the pre-rolling assembly according to the invention.
  • This descaling unit installed upstream of the first pre-rolling assembly enables thin slabs to be produced with an excellent surface quality as required for special successive processings.
  • a plurality of descaling units are included and are placed between the pairs of pre-rolling rolls.
  • the descaling units are placed between each pair of pre-rolling rolls.
  • the rolls are cooled inside to prevent the scale removed from the surface of the thin slabs from adhering to the surface of the roll itself.
  • the pre-rolling method according to the invention is carried out by at least one pre-rolling assembly 10 consisting of a plurality of pairs of rolls 14-16.
  • Fig.1 shows only the first of these pre-rolling assemblies 10 in association with foot rolls 12 and a mold 11, which produces a thin slab 20 continuously, a second pre-rolling assembly 10 installed immediately downstream being shown only partly.
  • the first pre-rolling assembly 10 is installed immediately downstream of the mold 11 at a distance of about 0.5 meters.
  • the pairs of rolls 14-16 shown may consist of continuous rows or be divided into sectors 14-16 or into groups of two or more pairs 114-116 or consist of belts 214-216 or be of any other known type.
  • the outer curved side 13 of the assembly 10 is the stationary or fixed part or frame, while the inner curved side 22 of the assembly 10 is the displaceable or loose part or frame of the pre-rolling assembly 10.
  • the rolls 14-114 and 214, and the other rolls disclosed in a variant, of the outer curved side 13 may be associated singly or in groups with at least one load cell 15, which sends signals to a control and data processing unit 21 of the pre-rolling device.
  • the rolls 16-116 and 216, and the other rolls disclosed in a variant, of the inner curved side 22 are associated singly or in groups with at least one hydraulic capsule or cylinder 17.
  • Each hydraulic capsule 17 is controlled by a servovalve 19 and is associated with a pressure transducer 18.
  • the servovalves 19 are controlled by the control and data processing unit 21 of the pre-rolling device.
  • each pair of rolls 14-16 is associated with an individual position transducer 24, and each pre-rolling assembly 10 is associated with two transducers 124 monitoring the position of the assembly and arranged respectively at the upstream end 124a and downstream end 124b of the pre-rolling assembly 10.
  • the assembly position transducers 124 are installed between the stationary outer curved side 13 and the displaceable inner curved side 22 of the pre-rolling assembly 10.
  • the assembly position transducers 124 are associated only with the displaceable inner curved side 22 of the pre-rolling assembly 10.
  • Each pressure transducer 18, each individual position transducer 24 and each assembly position transducer 124 send their own signals to the control and data processing unit 21 and possibly receive control and checking signals.
  • the parameters linked to the pre-rolling to be carried out and possibly associated with the type of material cast and with the dimensions of the thin slab 20 are set or introduced in the control and data processing unit 21 at the beginning of a rolling campaign.
  • the control and data processing unit 21 pre-arranges the pairs of rolls 14-16, 114-116, 214-216 and, when casting has started and the starter bar has been withdrawn, controls and adjusts the pairs of rolls 14-16, 114-116, 214-216 one by one so that the desired pre-rolling takes place.
  • means 25a to monitor the temperature of the cast molten metal and to monitor the temperature of the metal in the tundish, means 25b to monitor the temperature of the thin slab 20 leaving the mold 11 and means 26 to monitor the speed of the slab 20 are associated with the control and data processing unit 21 according to the invention.
  • All these monitoring means 25a, 25b and 26 send their signals to the control and data processing unit 21, thus enabling a dynamic control of the pre-rolling method to be carried out as a function of the speed of the slab 20 and ensuring a more correct management of the transient conditions of starting and stopping.
  • a plurality of auxiliary monitors 25b of the temperature of the slab 20 may be included and be positioned along the pre-rolling assembly 10 so as to control the development of the temperature of the slab 20 at pre-set points.
  • control and data processing unit 21 is connected to a general control and data processing unit 121 and to a unit 27 which introduces and collects data.
  • control and data processing unit 21 and/or the general control and data processing unit 121 which control adjustments, condition on the basis of a governing and control program set by the machine operator, for instance, the reciprocal positions of the rolls of the pairs of rolls 14-16 forming the pre-rolling assembly 10.
  • This control and adjustment system enables the thickness of the slab 20 to be reduced between 10% and 50%.
  • means 29 for secondary cooling of the slab 20 are associated with the pre-rolling assembly 10 according to the invention and consist in this case of a plurality of sprayer nozzles 30.
  • Both the rate of flow and the pressure of delivery of these sprayer nozzles 30 are regulated advantageously by the control and data processing unit 21 and/or by the general control and data processing unit 121, thus ensuring a continuous control of the conditions of the slab 20.
  • the regulation of the sprayer nozzles 30 may be governed by the possible monitors 25b of the temperature of the thin slab 20 which are arranged along the pre-rolling assembly 10.
  • At least one monitor 28 of a sonar type is associated with the pre-rolling assembly 10 according to the invention so as to identify the point of actual closure (kissing point) of the liquid cone within the slab 20.
  • This at least one monitor 28 is connected advantageously to the general control and data processing unit 121 so as to regulate the secondary cooling means 29.
  • the pre-rolling method according to the invention to reduce the thickness of a slab 20 moving at a casting speed of 4.5 meters per minute from a value of 70-75 mm. to 50 mm. in a travel between 0.8 and 2.5 meters long, but advantageously between 1.2 and 1.5 meters long.
  • the reduction of thickness can be progressive with constant values or be in steps, but advantageously with a final finishing segment in which the reduction is progressive.
  • a descaling device 23 is fitted downstream of the foot rolls 12 so as to produce a thin slab 20 having an excellent surface quality and has the purpose of removing the layer of oxides formed on the surface of the slab 20 immediately upstream of the pre-rolling assembly 10 according to the invention.
  • more than one descaling device 23 may be included and be installed between one pair of rolls 14-16 and the next pair.
  • the pairs of rolls 14-16 associated with the descaling devices 23 include means for the internal cooling of the pre-rolling rolls 14-16, for instance by internal circulation of a cooling fluid; the purpose of this is to prevent the scale removed by the descaling devices 23 from the surface of the slab 20 from adhering to the surface of the rolls owing to the high temperature, thus making necessary frequent maintenance and cleaning operations to keep the working surface of the rolls perfectly smooth.
  • Fig.5 shows how the skin 31 increases progressively and how at the same time the two-phase zone 32 too, which forms in a substantial manner owing to the pressure exerted by the pre-rolling assembly 10, is progressively reinforced and is closed before the slab 20 has left the pre-rolling assembly 10, so that the cone or pool of the liquid metal 33 remains surrounded within the pre-rolling assembly 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
EP94102876A 1993-05-17 1994-02-25 Method for the controlled pre-rolling of thin slabs leaving a continuous casting plant, and relative device Revoked EP0625388B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUD930083A IT1262116B (it) 1993-05-17 1993-05-17 Procedimento di prelaminazione controllata per bramme sottili uscenti da colata continua e dispositivo relativo
ITUD930083 1993-05-17

Publications (2)

Publication Number Publication Date
EP0625388A1 EP0625388A1 (en) 1994-11-23
EP0625388B1 true EP0625388B1 (en) 2000-07-12

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Application Number Title Priority Date Filing Date
EP94102876A Revoked EP0625388B1 (en) 1993-05-17 1994-02-25 Method for the controlled pre-rolling of thin slabs leaving a continuous casting plant, and relative device

Country Status (13)

Country Link
EP (1) EP0625388B1 (enrdf_load_stackoverflow)
KR (1) KR100263779B1 (enrdf_load_stackoverflow)
CN (1) CN1043193C (enrdf_load_stackoverflow)
AT (1) ATE194527T1 (enrdf_load_stackoverflow)
BR (1) BR9401449A (enrdf_load_stackoverflow)
CA (1) CA2119987C (enrdf_load_stackoverflow)
DE (1) DE69425188T2 (enrdf_load_stackoverflow)
DK (1) DK0625388T3 (enrdf_load_stackoverflow)
ES (1) ES2147562T3 (enrdf_load_stackoverflow)
IT (1) IT1262116B (enrdf_load_stackoverflow)
PT (1) PT625388E (enrdf_load_stackoverflow)
RU (1) RU2111083C1 (enrdf_load_stackoverflow)
TW (1) TW276196B (enrdf_load_stackoverflow)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1280171B1 (it) * 1995-05-18 1998-01-05 Danieli Off Mecc Linea di colata verticale per bramme
ATE175904T1 (de) * 1995-11-28 1999-02-15 Danieli Off Mecc Verfahren und vorrichtung zum geregelten vorwalzen von aus einer stranggiessanlage austretenden dünnbramme
DE19817034A1 (de) 1998-04-17 1999-10-21 Schloemann Siemag Ag Verfahren und Vorrichtung zum Stranggießen von dünnen Metallbändern
JP3355311B2 (ja) * 1999-04-21 2002-12-09 住友重機械工業株式会社 薄スラブ鋳片の連続鋳造方法および連続鋳造機
DE10122118A1 (de) * 2001-05-07 2002-11-14 Sms Demag Ag Verfahren und Vorrichtung zum Stranggiessen von Blöcken, Brammen und Dünnbrammen
KR100733371B1 (ko) * 2001-07-20 2007-06-28 주식회사 포스코 그라인딩머신의 비산 스케일 제거 장치
JP4351068B2 (ja) * 2002-02-22 2009-10-28 エス・エム・エス・ジーマーク・アクチエンゲゼルシャフト 鋼材から成る鋳造ストランドの連続鋳造及び直接変形をするための方法及び装置
DE10236367A1 (de) * 2002-08-08 2004-02-19 Sms Demag Ag Verfahren und Vorrichtung zum dynamischen Anstellen von einen Giessstrang aus Metall, insbesondere aus Stahl, beidseitig stützenden und/oder führenden Rollensegmenten
DE102004010038A1 (de) * 2004-03-02 2005-09-15 Sms Demag Ag Verfahren und Einrichtung zum Antreiben von Stützrollen einer Stranggießmaschine für flüssige Metalle, insbesondere für flüssige Stahlwerkstoffe
ITMI20051764A1 (it) * 2005-09-22 2007-03-23 Danieli Off Mecc Processo e impianto per la produzione di nastro metallico
DE102007004053A1 (de) * 2007-01-22 2008-07-31 Siemens Ag Gießanlage zum Gießen eines Gießguts und Verfahren zur Führung eines Gießguts aus einem Gießbehälter einer Gießanlage
DE102007058109A1 (de) * 2007-12-03 2009-06-04 Sms Demag Ag Vorrichtung zur Steuerung oder Regelung einer Temperatur
DE102008014524A1 (de) * 2007-12-28 2009-07-02 Sms Demag Ag Stranggießanlage mit einer Vorrichtung zur Bestimmung von Erstarrungszuständen eines Gießstrangs und Verfahren hierfür
AT506824B1 (de) * 2008-05-26 2013-01-15 Siemens Vai Metals Tech Gmbh Mehrstrang-stranggiessanlage
DE102008050393A1 (de) * 2008-10-02 2010-04-08 Sms Siemag Aktiengesellschaft Anordnung und Verfahren zur Detektierung eines Betriebszustandes einer Strangführung
US20110213486A1 (en) * 2008-11-04 2011-09-01 Sms Siemag Aktiengesellschaft Method and device for controlling the solidification of a cast strand in a strand casting plant in startup of the injection process
RU2503513C2 (ru) * 2009-05-06 2014-01-10 Сименс Акциенгезелльшафт Способ изготовления материала, прокатываемого в прокатном стане прокатной установки, управляющее и/или регулирующее устройство для прокатной установки для изготовления прокатываемого материала, прокатная установка для изготовления прокатываемого материала, машиночитаемый программный код и носитель для хранения данных
CN103212683B (zh) * 2012-01-20 2016-06-22 钢铁研究总院 一种具有倾斜转轴的倒角型足辊
CN109158568A (zh) * 2018-10-18 2019-01-08 武汉中飞扬测控工程有限公司 一种通过辊缝值计算对弧的方法
AT524482B1 (de) * 2020-09-18 2022-07-15 Primetals Technologies Austria GmbH Stranggießanlage und Verfahren zum Betrieb der Stranggießanlage
CN113333472B (zh) * 2021-08-08 2021-10-12 常州市坚力橡胶有限公司 一种橡胶轧辊及其装配的机床
EP4417341A1 (de) * 2023-02-14 2024-08-21 SMS Concast AG Verfahren zum herstellen von metallischen langprodukten sowie eine giesswalzanlage für die durchführung des verfahrens

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891025A (en) * 1972-06-29 1975-06-24 Schloemann Siemag Ag Apparatus for withdrawing a casting and feeding a dummy bar in a continuous casting machine for steel
US4134440A (en) * 1974-09-16 1979-01-16 Nippon Kokan Kabushiki Kaisha Method of continuously casting steel
US4056140A (en) * 1976-10-20 1977-11-01 United States Steel Corporation Method and mechanism for controlling forces in a continuous-casting machine
JPS6030565A (ja) * 1983-07-21 1985-02-16 O C C:Kk 加熱鋳型式連続鋳造法における鋳塊表面形状の安定法
US4809766A (en) * 1988-05-26 1989-03-07 Usx Corporation Continuous caster breakout damage avoidance system
DE3822939C1 (en) * 1988-07-04 1989-10-05 Mannesmann Ag, 4000 Duesseldorf, De Continuous casting method for the production of slabs with a reduced thickness relative to the cast condition
DE3823861A1 (de) * 1988-07-14 1990-01-18 Thyssen Stahl Ag Verfahren und anlage zum herstellen eines stahlbandes mit einer dicke von weniger als 10 mm
FR2645461A1 (fr) * 1989-04-06 1990-10-12 Techmetal Promotion Procede et dispositif de coulee continue de produits metalliques minces
IT1252847B (it) * 1991-10-31 1995-06-28 Danieli Off Mecc Gruppo di prelaminazione controllata per bramme sottili uscenti da colata continua

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DE69425188D1 (de) 2000-08-17
DE69425188T2 (de) 2001-03-22
EP0625388A1 (en) 1994-11-23
TW276196B (enrdf_load_stackoverflow) 1996-05-21
IT1262116B (it) 1996-06-19
ES2147562T3 (es) 2000-09-16
DK0625388T3 (da) 2000-10-30
BR9401449A (pt) 1994-12-06
ATE194527T1 (de) 2000-07-15
CA2119987A1 (en) 1994-11-18
ITUD930083A0 (it) 1993-05-17
CA2119987C (en) 1999-03-30
PT625388E (pt) 2000-12-29
KR100263779B1 (ko) 2000-09-01
CN1043193C (zh) 1999-05-05
ITUD930083A1 (it) 1994-11-17
RU2111083C1 (ru) 1998-05-20
CN1118719A (zh) 1996-03-20

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