EP1414603B1 - Procede et installation pour produire des produits plats et allonges - Google Patents

Procede et installation pour produire des produits plats et allonges Download PDF

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Publication number
EP1414603B1
EP1414603B1 EP02794548A EP02794548A EP1414603B1 EP 1414603 B1 EP1414603 B1 EP 1414603B1 EP 02794548 A EP02794548 A EP 02794548A EP 02794548 A EP02794548 A EP 02794548A EP 1414603 B1 EP1414603 B1 EP 1414603B1
Authority
EP
European Patent Office
Prior art keywords
strand
cooling line
cutting device
furnace
cooling
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.)
Expired - Lifetime
Application number
EP02794548A
Other languages
German (de)
English (en)
Other versions
EP1414603A1 (fr
Inventor
Thomas Fest
Dirk Letzel
Adolf Zajber
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1414603A1 publication Critical patent/EP1414603A1/fr
Application granted granted Critical
Publication of EP1414603B1 publication Critical patent/EP1414603B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • 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

Definitions

  • the invention relates to a process for the production of flat and long products in a production plant, for example from thin slabs, thick slabs, from billets, Blooms, Stroms, Stromervorprofilen or the like with a Continuous casting plant, comprising a mold, a strand guide with an extractor and leveler, a cooling section and a separator for the Strand, as well as a downstream equalization furnace, with the positioning the cooling section downstream behind the separator, preferably in the immediate Near the equalizing or preheating furnace.
  • the invention also relates to a device for carrying out the method.
  • the precipitation of aluminum nitride is one of the reasons for these problems rapid heating in direct hot-batching and rolling process.
  • Aluminum nitrides are found in most aluminum-tempered steels. These are formed and precipitated at the austenitic grain boundaries, when the steel is the transformation phase from austenite to austenite plus ferrite passes. When the cast strand is then in a stove for reheating the rolling is introduced, the precipitates remain on the austenitic Grain limits, even if the steel is a phase change back to complete austenite.
  • the excretion of aluminum nitride calls further problems with other precipitates such as copper, vanadium, among others, resulting in an extremely fragile microstructure.
  • a surface temperature between 400 and 900 ° C after the "natural tempering", i. a reheating by contained in the block Residual heat desired is also immediate after the extraction and straightening machine and before the separator intended.
  • the document DE 44 16 752 A1 describes a method and a production plant for the production of hot rolled strip.
  • the corresponding production plant consists of a continuous caster for thin slabs between 40 and 70 mm, a compensation furnace and a rolling mill, wherein the exit temperature the thin slab from the continuous casting machine above 950 ° C is. Between the continuous casting machine and the equalization furnace is the Lowered the surface temperature of the slab to a sufficient depth, that a structural transformation of austenite into ferrite / pearlite occurs.
  • the used cooling section is designed as a water cooling section and consists of several switchable and disconnectable chilled beams.
  • the previously known method provides that by selecting the cooling intensity the temperature of the thin slab to a depth of at least 2 mm below the surface is lowered to below 600 ° C.
  • the middle Surface temperature should be the Martensitschwelle the respective material quality do not fall short.
  • the cooling time is chosen so that at least 70% Austenite can be converted into ferrite / perlite.
  • WO 97/05971 A discloses as the closest prior art a process and a plant for the production of flat products, wherein the cooling section after the separator and immediately before the Ausgleirhsofen is arranged.
  • the document DE 199 53 252 A1 discloses a method for surface treatment a continuously cast steel product and equipment for this purpose.
  • a removal of surface defects and impurities to achieve is the surface processing step one Cooling at least a part of at least one surface of the metallic Products precede the defined temperature reduction to working surface.
  • the document JP 11254115 A discloses a continuous casting process in which poured liquid steel from a funnel into a mold and from this one solidified strand is pulled out. After a bend in the horizontal position the strand is stretched and split between pinch rollers. The sections are immersed in a cooling water boiler to increase the surface texture The temperature of the cooling water is constantly monitored. Also the quality of the surface structure is observed and in a following Preheating oven corrected.
  • Document JP 2000246411 A discloses a method for avoiding Cracking of a casting by targeted cooling. Austenitic crystal grain on the surface layer of the strand is before cooling Recrystallized by a forced cooling device and then provided in Length sections parts. Before further mechanical processing the strand is sprayed with high-pressure jets of a liquid coolant and then subjected to machining by rolling or hammering.
  • the invention has the object underlying, a process for surface improvement of steel strands for all continuous casting formats, the independence from the casting speed offers and the "natural-tempering" with core heat of the cast strand avoids.
  • the object of the invention is also a corresponding device provide.
  • Another method embodiment provides that for intensive dissipation of heat from the cooling section this enclosed with a sheath and steam and residues of unvaporised cooling water forcibly subtracted from.
  • the invention provides with advantage that the amount of water and water pressure controlled or regulated according to the current strand transport speed become. Due to the positioning of the cooling section downstream of the Separator is the dependence of the cooling distance on the speed lifted the casting process.
  • This provides a further embodiment of the method according to the invention before that the distance between the puller and straightening machine and the Separating device for homogenizing the temperature different Strand areas, e.g. on edges or surfaces, is used.
  • another embodiment of the method according to the invention provides before that the cooling section in a region of the strand guide with possible high temperature of the strand between the separator and the Equalization furnace is arranged.
  • a plant for the production of flat or long products in a production plant for example, from thin slabs, thick slabs, from Knüppein, Blooms, Reliefvorprofilen or the like with a continuous caster, comprising a mold, a strand guide with a pull-out and straightening machine, a cooling section and a separation device for the cast strand and one of these downstream compensation furnace or Voricarmofen, in as possible small distance behind the cooling section and this in the least possible Distance is arranged behind the separator.
  • the cooling section with equipped with a variety of high pressure water spray nozzles that the Casting strand surrounded on all sides.
  • a mold 11 can be seen, which for continuous casting a cast strand 6 is formed.
  • segments 12 to 14 of a strand guide 1 with a plurality of guide rollers are also possible.
  • the pull-out and straightening machine 2 ensures a uniform separation and Transport of the strand 6. Behind it is in the transport direction, the separator 3 provided. It can be a pair of scissors or an autogenous cutting machine act. This is in relatively close distance arranged behind the pull-out and straightening machine 2.
  • the invention with water spray nozzles 7 is equipped and enclosed by a housing 9.
  • a suction device 10 with a powerful Exhaustor connected which is the resulting during quenching steam and the unused Wassersprühteilchen sucks and from the cooling section 4 forcibly deducted.
  • a cooling of the surface layer 8 is achieved, the example. at least 2 mm.
  • the compensation furnace or preheating furnace 5 is arranged at a close distance, wherein by external heat supply recrystallization of the microstructure in Direction perlite / ferrite is initiated. That for the surface quality of the cast strand Detrimental "natural quenching" is avoided in this way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Metal Rolling (AREA)

Claims (8)

  1. Procédé pour la production de produits allongés et plats dans une installation de production, par exemple des brames minces, des brames épaisses, des billettes, des blooms, des profilés et similaires avec une installation de coulée continue, comprenant une lingotière (11), un guide de barre (1) avec des rouleaux extracteurs et dresseurs (2), un tunnel de refroidissement (4) et un dispositif de séparation (3) pour la barre (6), ainsi qu'un four de compensation ou four de préchauffage (5) disposé en aval, le positionnement du tunnel de refroidissement (4) se faisant en aval derrière le dispositif de séparation (3), de préférence à proximité immédiate du four de compensation ou de préchauffage (5), caractérisé en ce que dans le tunnel de refroidissement (4) la couche de surface (8) de la barre (6) est refroidie au moyen de jet d'aspersion d'eau à haute pression riche en énergie (7) par choc et un réamorçage de cette couche de surface (8) est empêché au moyen de la chaleur de noyau de cette barre (6) de préférence par un refroidissement poursuivi relativement faible.
  2. Procédé selon la revendication 1, caractérisé en ce que pour l'évacuation intensive de la chaleur hors du tunnel de refroidissement (4) celui-ci est entouré d'une enveloppe (9) et la vapeur ainsi que des résidus d'eau de refroidissement non évaporée étant évacués par force.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la pression et la quantité d'eau est pilotée respectivement régulée selon la vitesse actuelle de transport de la barre.
  4. Procédé selon une ou plusieurs des revendications 1 à 3, caractérisé en ce que le parcours entre les rouleaux extracteurs et dresseurs (2) et le dispositif de séparation (3) est utilisé pour l'homogénéisation des températures de différentes zones de barre, par exemple, sur des bords ou surface.
  5. Procédé selon une ou plusieurs des revendications 1 à 4, caractérisé en ce que le tunnel de refroidissement (4) est disposé dans une zone du guide de barre (1) avec une température la plus élevée possible de la barre (6) entre le dispositif de séparation (3) et le four de compensation ou four de préchauffage (5).
  6. Installation pour la production de produits allongés ou plats dans une installation de production par exemple par exemple des brames minces, des brames épaisses, des billettes, des blooms, des profilés et similaires avec une installation de coulée continue, comprenant une lingotière (11), un guide de barre (1) avec les rouleaux extracteurs et dresseurs (2), un tunnel de refroidissement (4) et un dispositif de séparation (3) pour la barre (6), ainsi qu'un four de compensation ou four de préchauffage (5) disposé en aval, le positionnement du tunnel de refroidissement (4) se faisant en aval derrière le dispositif de séparation (3), caractérisée en ce que le tunnel de refroidissement (4) est muni d'une pluralité de tuyères haute pression (7) qui entourent de part et d'autres la barre de coulée continue (6).
  7. Installation selon la revendication 6, caractérisée en ce que le tunnel de refroidissement (4) est entouré d'un coffret (9) qui est relié à un dispositif d'aspiration (10) par exemple un aspirateur.
  8. Installation selon la revendication 6 ou 7, caractérisée en ce que les rouleaux extracteurs et dresseurs (2), le dispositif de séparation (3) et le tunnel de refroidissement (4) sont disposés en commun à l'intérieur d'une cloche d'isolation non séparée.
EP02794548A 2001-08-07 2002-08-05 Procede et installation pour produire des produits plats et allonges Expired - Lifetime EP1414603B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10138794 2001-08-07
DE10138794A DE10138794A1 (de) 2001-08-07 2001-08-07 Verfahren und Anlage zur Produktion von Flach- und Langprodukten
PCT/EP2002/008711 WO2003013763A1 (fr) 2001-08-07 2002-08-05 Procede et installation pour produire des produits plats et allonges

Publications (2)

Publication Number Publication Date
EP1414603A1 EP1414603A1 (fr) 2004-05-06
EP1414603B1 true EP1414603B1 (fr) 2005-01-12

Family

ID=7694701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02794548A Expired - Lifetime EP1414603B1 (fr) 2001-08-07 2002-08-05 Procede et installation pour produire des produits plats et allonges

Country Status (4)

Country Link
EP (1) EP1414603B1 (fr)
AT (1) ATE286792T1 (fr)
DE (2) DE10138794A1 (fr)
WO (1) WO2003013763A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009048567A1 (de) 2008-10-23 2010-05-12 Sms Siemag Ag Verfahren und Anordnung zum Kühlen eines Gießstrangs in einer Stranggießanlage
DE102009049897A1 (de) 2009-10-20 2011-04-28 Sms Siemag Ag Verfahren und Vorrichtung zum Stranggießen eines Metallstranges

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101351285B (zh) * 2006-01-11 2011-12-28 Sms西马格股份公司 用于连铸的方法和装置
DE102006056683A1 (de) 2006-01-11 2007-07-12 Sms Demag Ag Verfahren und Vorrichtung zum Stranggießen
CN107866359A (zh) * 2017-12-20 2018-04-03 南通亿思特机器人科技有限公司 一种浸塑补偿链生产设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19529049C1 (de) * 1995-07-31 1997-03-20 Mannesmann Ag Hochgeschwindigkeits-Dünnbrammenanlage
JP3952580B2 (ja) * 1998-03-09 2007-08-01 大同特殊鋼株式会社 連続鋳造・分塊圧延における鋳片・鋼片の表面品質オンライン判定方法および判定装置
JP2000246411A (ja) * 1999-02-26 2000-09-12 Sanyo Special Steel Co Ltd 連続鋳造ブルームの製造方法
DE19953252A1 (de) * 1999-11-04 2001-05-10 Sms Demag Ag Verfahren zur Oberflächenbearbeitung eines kontinuierlich gegossenen Stahlproduktes und Einrichtung hierzu

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009048567A1 (de) 2008-10-23 2010-05-12 Sms Siemag Ag Verfahren und Anordnung zum Kühlen eines Gießstrangs in einer Stranggießanlage
DE102009048567B4 (de) 2008-10-23 2022-07-21 Sms Group Gmbh Verfahren und Anordnung zum Kühlen eines Gießstrangs in einer Stranggießanlage
DE102009049897A1 (de) 2009-10-20 2011-04-28 Sms Siemag Ag Verfahren und Vorrichtung zum Stranggießen eines Metallstranges
DE102009049897B4 (de) 2009-10-20 2023-09-14 Sms Group Gmbh Verfahren und Vorrichtung zum Stranggießen eines Metallstranges

Also Published As

Publication number Publication date
WO2003013763A1 (fr) 2003-02-20
DE50202008D1 (de) 2005-02-17
EP1414603A1 (fr) 2004-05-06
DE10138794A1 (de) 2003-02-27
ATE286792T1 (de) 2005-01-15

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