WO2009141206A1 - Verfahren zum stranggiessen eines metallstrangs - Google Patents
Verfahren zum stranggiessen eines metallstrangs Download PDFInfo
- Publication number
- WO2009141206A1 WO2009141206A1 PCT/EP2009/054786 EP2009054786W WO2009141206A1 WO 2009141206 A1 WO2009141206 A1 WO 2009141206A1 EP 2009054786 W EP2009054786 W EP 2009054786W WO 2009141206 A1 WO2009141206 A1 WO 2009141206A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- strand
- metal
- continuous casting
- taking
- thickness
- Prior art date
Links
Classifications
-
- 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
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
Definitions
- the present invention relates to a method for continuously casting a metal strand in a continuous casting plant.
- the invention relates to a process for the continuous casting of a metal strand, in particular a steel strand, in a continuous casting, wherein a strand with a trapped by a strand shell, liquid core drawn from a cooled continuous casting mold, in one of
- Continuous casting subordinate strand support means supported, cooled with coolant and optionally metallurgically reduced, wherein thermodynamic state changes of the entire strand in a mathematical simulation model, including a heat conduction equation, are also included.
- a method for the continuous casting of a metal strand in which a strand drawn from a strand shell liquid core extracted from a cooled mold, then supported in a strand support device and cooled with coolant.
- the state changes occurring in the course of the continuous casting process are also calculated in real time for the entire strand by means of a mathematical simulation model, including the heat conduction equation, and the cooling of the strand is set as a function of the calculated thermodynamic state changes.
- a method for continuous casting is known from DE 10122118 A1 in which a metal strand is drawn out of a mold, supported in a strand support device, cooled with coolant and at least one pair of strand support rolls of a metallurgical reduction, specifically a reduction in thickness in the form of a liquid core reduction. is subjected.
- the skilled person is further known that a metal strand in continuous casting in the course of its solidification of a shrinkage, ie a change of strand dimensions, is subjected.
- the size of the strand shrinkage occurring depends on the operating parameters of the continuous casting plant, for example on physical parameters of the metal to be cast, the casting temperature, the casting speed, the strand thickness or the strand cooling.
- the object of the invention is to provide a method of the type mentioned, with which the product quality of a metal strand, for example by reducing the porosity and / or segregations, improved surface quality and / or shape retention, can be further improved.
- a natural shrinkage of the strand in real time taking into account the physical parameters of the metal, the temperature of the metal in the casting manifold, the constantly measured pullout speed, the strand cooling and the thickness of the Strand is also calculated and adjusable strand strand guide rollers of the strand support device can be adjusted taking into account the natural shrinkage of the metal strand.
- the mathematical simulation model When calculating the natural shrinkage of the strand, the mathematical simulation model generates a heat equation in real time, taking into account the physical parameters of the metal, the temperature of the metal Metal in the casting manifold, the constantly measured extraction speed, the strand cooling and the thickness of the strand solved numerically.
- the strand is discretized, ie, for example, divided into a plurality of volume elements, and the heat equation equation periodically resolved taking into account the initial and boundary conditions by means of a process computer for the plurality of discrete elements, resulting in the time-varying temperature field of the entire strand.
- natural shrinkage is the thermal
- Expansion behavior of the strand as a function of temperature changes After the thermodynamic state changes for each discrete element from the solution of the heat conduction equation are known, the natural shrinkage of each element can be calculated, for example, from the volume expansion or contraction. If the metal strand is not to be further metallurgically reduced, the distances of the strand guide rollers that can be attached to the strand in the strand thickness direction are adjusted such that these distances follow the natural shrinkage of the metal strand in the strand extraction direction.
- Two further advantageous embodiments of the method according to the invention arise when a further metallurgical reduction of the metal strand in the strand support device, for example a liquid core reduction, a soft reduction (in particular a dynamic soft reduction) or a surface treatment, taking into account the natural shrinkage of
- Metal strand is performed.
- the person skilled in the liquid core reduction and the soft reduction are known, whereby these metallurgical reduction methods are not further explained.
- a metallurgical surface treatment of the metal strand in the strand support device is also known from EP 1289691 Bl.
- the method according to the invention is carried out when the thermal equation is solved numerically in the mathematical simulation model taking into account temperature-dependent density changes of the metal strand. It is known to the person skilled in the art that the change in density of metal as a function of the temperature can assume significant proportions. So m 3 at 1550 0 C (temperature of the melt in the distribution trough) increases for example in the continuous casting process, the density of steel of about 7000 kg / 7800 kg to about / m 3 at 300 0 C ( micerstarrter strand).
- a further advantageous embodiment of the method according to the invention is that in the numerical solution of the heat equation, taking into account temperature-dependent density changes of the metal strand approximated equations are used for the enthalpy, which have the exact mass and the exact enthalpy for the entire strand.
- the growth or the conversion between different types of microstructures can be considered advantageously in the method according to the invention if the mathematical simulation model includes a computational model describing the formation of a desired microstructure in the metal strand, in a particularly advantageous manner by the application of a continuous Avrami phase conversion model.
- the strand cooling is adjusted taking into account the calculated thermodynamic state changes.
- the inventive method can be used without restriction in the casting of metal strands with billet, billet, slab or thin slab cross-section of any size in order to improve the quality of the cast metal strands.
- Strangs a setpoint as possible corresponds.
- the controller assumes either the calculated thickness of the strand or a measured beach thickness. in the In the first case, the calculated thickness is used to determine the manipulated variable, so that the thickness of the strand or a distance between the strand guide rollers need not be detected separately.
- the thickness of the strand is detected by means of a measuring device and fed to a controller, wherein the manipulated variable is determined taking into account the detected thickness of the strand.
- FIG. 1 shows a continuous casting plant in a schematic side view
- FIG. 2 shows a schematic representation of a hydraulically adjustable segment of a strand support device
- a steel strand 1 is formed from a molten steel 2 having a specific chemical composition by casting in a cooled continuous casting mold 3.
- the molten steel 2 is from a ladle 4 via a tundish 5 and one of the tundish 5 by means of a in the
- Continuous mold 3 formed pouring mirror reaching pouring tube 6 poured into the continuous casting mold 3.
- strand guide rollers 7 are provided below the continuous casting mold 3 a strand support device for supporting the steel strand 1, which still has a liquid core 8 and initially only a very thin strand shell 9.
- the steel strand 1 emerging from the straight-through-die with a straight axis is deflected in a bending zone 10 into an arcuate path 11 and is guided by strand guide rollers 7, which are arranged in several hydraulically adjustable segments 13. supported.
- subsequent straightening zone 12 of the steel strand 1 is again straightened and discharged via a discharge roller table or reduced directly online thickness, for example by means of an on-line roll stand.
- the steel strand 1 For cooling the steel strand 1, it is cooled directly or indirectly via strand guide rollers 7 provided with an internal cooling, whereby a specific temperature of the steel strand 1 can be adjusted.
- Such strand cooling taking into account the thermodynamic state changes calculated online is known from DE 4417818 Al the applicant.
- the physical parameters of the steel 2 for example the density, the specific heat capacity and conductivity, furthermore parameters of the strand cooling, the roll pitch, the strand width, the strand thickness in the mold and measured values of the strand thickness in the segments, can still be included in an input unit of the process computer 14 13 and the continuously measured casting speed can be entered.
- the process computer 14 are based on a mathematical simulation model, comprising a heat conduction equation and a metallurgical calculation model for the consideration of
- Phase transformation kinetics according to Avrami which calculates the target water quantities of strand cooling.
- the steel strand 1 is cooled in a controlled manner in each segment, wherein the cooling water quantity in individual cooling zones of the segment of one valve (in FIG. 1, for reasons of clarity, only one valve is shown in one segment) of the strand cooling is set, which in turn is provided by an output unit of the process computer 14 is controlled.
- the steel strand 1 no further metallurgical reduction, for example, Liquid Core Reduction, soft reduction or surface treatment of the strand are subjected, where the distance of strandable strand strand guide rollers 7 of the segments 13 via one or more hydraulic cylinders 15 to the calculated strand thickness, i. considering the natural shrinkage, adjusted.
- the changes in thickness necessary for the reduction will be calculated for the strand thicknesses - under
- thermodynamic state changes of the steel strand 1 are preferably calculated by means of a heat conduction equation taking into account the temperature-dependent change in the density of the steel strand.
- a two-dimensional heat equation is, for example
- the method according to the invention is independent of the dimension of the heat conduction equation and can therefore also be used without restriction with equations of a different dimension, for example, three-dimensional equations.
- T ref is an arbitrary but constant reference temperature (usually 25 ° C.)
- a parallel (as shown) or conical course of the strand thickness of the steel strand 1 can be set.
- the thickness of the steel strand 1 can be adjusted via a hydraulic adjustment of the segment 13, wherein in a displacement measuring system of a hydraulic cylinder 15, the actual position and thus the distance between opposite strand guide rollers 7 measured and passed on to the process computer.
- the process computer 14 calculates the natural strand shrinkage via the solution of the heat conduction equation and takes it into account in further metallurgical reductions, in the specific case of an LCR reduction with a liquid core 8, and thus specifies the target thickness of the steel strand 1.
- a manipulated variable is determined by means of a nominal-actual comparison of the strand thickness and to an electro-hydraulic valve, which the
- Hydraulic cylinder 15 is assigned, issued.
- the segments 13 can be used on the one hand for the adjustment of the strand guide rollers 7 to the natural strand shrinkage, on the other hand can be realized on appropriate positions of the rollers 7, of course, all metallurgical reductions in the strand support device.
- the strand 1 is supported by the strand support rollers 7 on a lower part of a segment frame 17, on the inside of the strand, the support via strand support rollers 7 on an upper part of the segment frame 16.
- the extension direction of the steel strand 1 is shown by an arrow. Reference sign list
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200980118623.6A CN102149492B (zh) | 2008-05-21 | 2009-04-22 | 连续铸造金属连铸坯的方法 |
KR1020107028759A KR101781805B1 (ko) | 2008-05-21 | 2009-04-22 | 금속 스트랜드의 연속 주조 방법 |
EP09749696.2A EP2279052B1 (de) | 2008-05-21 | 2009-04-22 | Verfahren zum stranggiessen eines metallstrangs |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA816/2008 | 2008-05-21 | ||
ATA816/2008A AT506976B1 (de) | 2008-05-21 | 2008-05-21 | Verfahren zum stranggiessen eines metallstrangs |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009141206A1 true WO2009141206A1 (de) | 2009-11-26 |
Family
ID=40897529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/054786 WO2009141206A1 (de) | 2008-05-21 | 2009-04-22 | Verfahren zum stranggiessen eines metallstrangs |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2279052B1 (de) |
KR (1) | KR101781805B1 (de) |
CN (1) | CN102149492B (de) |
AT (1) | AT506976B1 (de) |
WO (1) | WO2009141206A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2753439B1 (de) | 2011-09-06 | 2015-08-12 | SMS group GmbH | Giessverfahren, insbesondere stranggiessverfahren |
CN106141127A (zh) * | 2015-04-17 | 2016-11-23 | 宝钢工程技术集团有限公司 | 重压下连铸生产方法 |
DE102015215328A1 (de) | 2015-08-11 | 2017-02-16 | Sms Group Gmbh | Verfahren zum Stranggießen eines Metallstrangs und zum Bestimmen des Schrumpfs eines stranggegossenen Metallstrangs |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2633929A1 (de) * | 2012-03-01 | 2013-09-04 | Siemens Aktiengesellschaft | Modellierung einer Gießwalzanlage |
RU2678112C2 (ru) | 2014-12-24 | 2019-01-23 | ДжФЕ СТИЛ КОРПОРЕЙШН | Способ непрерывного литья стали |
TWI580496B (zh) * | 2014-12-25 | 2017-05-01 | Jfe Steel Corp | Continuous Casting of Steel |
CN107282904B (zh) * | 2017-05-09 | 2019-03-05 | 江阴兴澄特种钢铁有限公司 | 一种连铸轻压下测厚辊设置及控制方法 |
CN107552750B (zh) * | 2017-08-07 | 2023-05-23 | 中冶连铸技术工程有限责任公司 | 可生产超大断面异型坯或板坯的多流连铸机及生产方法 |
DE102017219289A1 (de) * | 2017-10-27 | 2019-05-02 | Sms Group Gmbh | Verfahren zum Trennen eines Gießstranges oder Zwischenbandes mittels einer Schere |
CN109848383B (zh) * | 2017-11-30 | 2020-12-22 | 宝山钢铁股份有限公司 | 一种改善铸坯内部质量的灵活压下方法 |
EP3831511A1 (de) | 2019-12-05 | 2021-06-09 | Primetals Technologies Austria GmbH | Verfahren und computersystem zur vorhersage einer schrumpfung eines gegossenen metallproduktes |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4417808A1 (de) * | 1993-05-24 | 1994-12-01 | Voest Alpine Ind Anlagen | Verfahren zum Stranggießen eines Metallstranges |
WO2001089742A1 (de) * | 2000-05-23 | 2001-11-29 | Sms Demag Aktiengesellschaft | Verfahren und einrichtung zum anstellen eines oder mehrerer rollensegmente in einer stranggiessanlage für metalle, insbesondere für stahlwerkstoffe |
US20020070000A1 (en) * | 2000-02-19 | 2002-06-13 | Axel Weyer | Method and device for casting prefabricated products in a continuous casting device |
WO2003051558A2 (de) * | 2001-12-18 | 2003-06-26 | Sms Demag Aktiengesellschaft | MAULWEITENREGELUNG AN SEGMENTEN FÜR STRANGGIEssANLAGEN |
DE102005028711A1 (de) * | 2005-06-20 | 2006-12-28 | Siemens Ag | Verfahren zur Regelung und/oder Steuerung eines verstellbaren Rollensegmentes in einer Stranggießanlage |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT409352B (de) * | 2000-06-02 | 2002-07-25 | Voest Alpine Ind Anlagen | Verfahren zum stranggiessen eines metallstranges |
AT411026B (de) * | 2001-11-30 | 2003-09-25 | Voest Alpine Ind Anlagen | Verfahren zum stranggiessen |
DE10251716B3 (de) * | 2002-11-06 | 2004-08-26 | Siemens Ag | Modellierverfahren für ein Metall |
DE102004002783A1 (de) * | 2004-01-20 | 2005-08-04 | Sms Demag Ag | Verfahren und Einrichtung zum Bestimmen der Lage der Sumpfspitze im Gießstrang beim Stranggießen von flüssigen Metallen, insbesondere von flüssigen Stahlwerkstoffen |
-
2008
- 2008-05-21 AT ATA816/2008A patent/AT506976B1/de not_active IP Right Cessation
-
2009
- 2009-04-22 CN CN200980118623.6A patent/CN102149492B/zh active Active
- 2009-04-22 EP EP09749696.2A patent/EP2279052B1/de active Active
- 2009-04-22 WO PCT/EP2009/054786 patent/WO2009141206A1/de active Application Filing
- 2009-04-22 KR KR1020107028759A patent/KR101781805B1/ko active IP Right Grant
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4417808A1 (de) * | 1993-05-24 | 1994-12-01 | Voest Alpine Ind Anlagen | Verfahren zum Stranggießen eines Metallstranges |
US20020070000A1 (en) * | 2000-02-19 | 2002-06-13 | Axel Weyer | Method and device for casting prefabricated products in a continuous casting device |
WO2001089742A1 (de) * | 2000-05-23 | 2001-11-29 | Sms Demag Aktiengesellschaft | Verfahren und einrichtung zum anstellen eines oder mehrerer rollensegmente in einer stranggiessanlage für metalle, insbesondere für stahlwerkstoffe |
WO2003051558A2 (de) * | 2001-12-18 | 2003-06-26 | Sms Demag Aktiengesellschaft | MAULWEITENREGELUNG AN SEGMENTEN FÜR STRANGGIEssANLAGEN |
DE102005028711A1 (de) * | 2005-06-20 | 2006-12-28 | Siemens Ag | Verfahren zur Regelung und/oder Steuerung eines verstellbaren Rollensegmentes in einer Stranggießanlage |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2753439B1 (de) | 2011-09-06 | 2015-08-12 | SMS group GmbH | Giessverfahren, insbesondere stranggiessverfahren |
CN106141127A (zh) * | 2015-04-17 | 2016-11-23 | 宝钢工程技术集团有限公司 | 重压下连铸生产方法 |
DE102015215328A1 (de) | 2015-08-11 | 2017-02-16 | Sms Group Gmbh | Verfahren zum Stranggießen eines Metallstrangs und zum Bestimmen des Schrumpfs eines stranggegossenen Metallstrangs |
Also Published As
Publication number | Publication date |
---|---|
CN102149492A (zh) | 2011-08-10 |
AT506976A1 (de) | 2010-01-15 |
EP2279052A1 (de) | 2011-02-02 |
KR20110020854A (ko) | 2011-03-03 |
KR101781805B1 (ko) | 2017-10-23 |
AT506976B1 (de) | 2012-10-15 |
EP2279052B1 (de) | 2016-11-09 |
CN102149492B (zh) | 2014-06-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2279052B1 (de) | Verfahren zum stranggiessen eines metallstrangs | |
EP3184202B1 (de) | Verfahren zum stranggiessen eines metallstranges | |
AT408197B (de) | Verfahren zum stranggiessen eines metallstranges | |
DE19612420C2 (de) | Verfahren und Einrichtung zur Steuerung der Kühlung eines Stranges in einer Stranggießanlage | |
EP2753439B1 (de) | Giessverfahren, insbesondere stranggiessverfahren | |
EP1200216B1 (de) | Verfahren und einrichtung zum herstellen eines stranges aus metall | |
EP1289691B1 (de) | Verfahren zum stranggiessen eines metallstranges | |
DE10033307C2 (de) | Verfahren und Einrichtung zum Gießen eines metallischen Endlosstranges | |
EP2346631B1 (de) | Verfahren und vorrichtung zur steuerung der erstarrung eines giessstranges in einer stranggiessanlage beim anfahren des giessprozesses | |
EP2762251B1 (de) | Verfahren und Vorrichtung zum Gießen eines Strangs | |
AT506847A1 (de) | Verfahren zum stranggiessen eines metallstrangs | |
WO2007042170A1 (de) | Verfahren zum stranggiessen einer metallschmelze | |
EP3173166B1 (de) | Verfahren und vorrichtung zum einstellen der breite eines stranggegossenen metallstrangs | |
EP2673099B1 (de) | Verfahren zur regelung einer temperatur eines strangs durch das positionieren einer verfahrbaren kühldüse in einer strangführung einer stranggiessanlage | |
EP1385656B1 (de) | Verfahren zum stranggiessen von blöcken, brammen oder dünnbrammen | |
DE102009048567B4 (de) | Verfahren und Anordnung zum Kühlen eines Gießstrangs in einer Stranggießanlage | |
EP2804708B1 (de) | Modellierung einer giesswalzanlage | |
AT508790B1 (de) | Verfahren und vorrichtung zum vergiessen von metallischer schmelze zu stranggegossenen vorprodukten in einer stranggiessmaschine | |
EP2295170A2 (de) | Verfahren und Stranggießvorrichtung zum Verformen eines gießwarmen Stranges aus Metall, insbesondere aus Stahl oder stahlwerkstoffen | |
EP1743721A2 (de) | Verfahren und Stranggiessvorrichtung zum Verformen eines giesswarmen Stranges aus Metall, insbesondere aus Stahl oder Stahlwerkstoffen | |
DE69000282T2 (de) | Verfahren und vorrichtung zur herstellung von duennen metallprodukten mittels strangguss. | |
EP4091737A1 (de) | Umrechnung von gemessenen temperaturwerten einer stranggiesskokille | |
EP1013362A1 (de) | Verfahren und Vorrichtung zum Stranggiessen von Brammen | |
EP1381483A2 (de) | Formatdickenerhöhung für dünnbrammen-stranggiessanlagen |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200980118623.6 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09749696 Country of ref document: EP Kind code of ref document: A1 |
|
REEP | Request for entry into the european phase |
Ref document number: 2009749696 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009749696 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 7915/DELNP/2010 Country of ref document: IN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20107028759 Country of ref document: KR Kind code of ref document: A |