EP1414603B1 - Verfahren und anlage zur produktion von flach- und langprodukten - Google Patents
Verfahren und anlage zur produktion von flach- und langprodukten Download PDFInfo
- 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
Links
- 238000000034 method Methods 0.000 title claims description 23
- 238000009434 installation Methods 0.000 title abstract 3
- 238000001816 cooling Methods 0.000 claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 238000009749 continuous casting Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 7
- 239000002344 surface layer Substances 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 14
- 239000010959 steel Substances 0.000 abstract description 14
- 238000000926 separation method Methods 0.000 abstract description 5
- 238000010791 quenching Methods 0.000 description 7
- 230000000171 quenching effect Effects 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 229910001566 austenite Inorganic materials 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005496 tempering Methods 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 230000009931 harmful effect Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- -1 Aluminum nitrides Chemical class 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000000018 nitroso group Chemical group N(=O)* 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
Images
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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Metal Rolling (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Description
- die Möglichkeit einer Minimierung der schädlichen Cu-Einflüsse bei Einsatz minderwertigen, preiswerteren Schrottes, wobei auch die schädlichen Effekte der vorgenannten Elemente Al, V, Nb und Pb weitgehend unterdrückt werden,
- infolge der Positionierung hinter der Trenneinrichtung in unmittelbarer Nähe zum Vorwärmofen des Walzwerkes wird eine Wiedererwärmung der Oberfläche der Dünnbramme durch eigenen Wärmeinhalt (natural tempering) vermieden;
- bei der vorgeschlagenen Position der Quenchingeinrichtung kann durch Abschirmen des Stranges vor dem Quenchen ein gewisser Temperaturausgleich im Strang erzielt werden;
- der Weg von der Streckrichtmaschine bis zur Schere kann zur Temperaturhomogenisierung genutzt werden;
- ein wesentlicher Vorteil im Quenchen nach dem Trennen besteht in der Unabhängkeit von der Gießgeschwindigkeit. Zusätzlich zur Steuerung der Wassermenge und des Druckes ergibt sich hier die Möglichkeit einer Regelung der Strangtransportgeschwindigkeit.
- 1
- Strangführung
- 2
- Auszieh- und Richtmaschine
- 3
- Trennvorrichtung
- 4
- Kühlstrecke
- 5
- Ausgleichsofen / Vorwärmofen
- 6
- Strang
- 7
- Wassersprühstrahlen
- 8
- Oberflächenschicht des Stranges
- 9
- Gehäuse
- 10
- Exhaustor
- 11
- Kokille
- 12
- Strangführungssegment
- 13
- Strangführungssegment
- 14
- Strangführungssegment
Claims (8)
- Verfahren zur Produktion von Flach- und/oder Langprodukten in einer Produktionsanlage, beispielsweise aus Dünnbrammen, Dickbrammen, aus Knüppeln, Blooms, Trägervorprofilen oder dergleichen mit einer Stranggießanlage, umfassend eine Kokille (11), eine Strangführung (1) mit einer Auszieh- und Richtmaschine (2), eine Kühlstrecke (4) und eine Trenneinrichtung (3) für den Strang (6), sowie einen nachgeordneten Ausgleichsofen oder Vorwärmofens (5), wobei die Positionierung der Kühlstrecke (4) stromabwärts hinter der Trennvorrichtung (3), bevorzugt in unmittelbarer Nähe des Ausgleichsofens oder Vorwärmofens (5), vorgenommen wird,
dadurch gekennzeichnet, dass in der Kühlstrecke (4) die Oberflächenschicht (8) des Stranges (6) mittels energiereicher Hochdruck-Wassersprühstrahlen (7) schockartig gekühlt und ein Wiederanlassen dieser Oberflächenschicht (8) mittels Kemwärme des Stranges (6) vorzugsweise durch fortgesetzt vergleichsweise geringe Kühlung verhindert wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass zur intensiven Abfuhr von Wärme aus der Kühlstrecke (4) diese mit einer Umhüllung (9) umschlossen und daraus Dampf sowie Reste unverdampften Kühlwasser zwangsweise abgezogen werden. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass Wassermenge und -druck nach der aktuellen Strangtransport-Geschwindigkeit gesteuert bzw. geregelt werden. - Verfahren nach einem oder mehreren der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass die Strecke zwischen der Auszieh- und Richtmaschine (2) und der Trennvorrichtung (3) zur Homogenisierung der Temperaturen unterschiedlicher Strangbereiche, z. B. an Kanten oder Flächen, genutzt wird. - Verfahren nach einem oder mehreren der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass die Kühlstrecke (4) in einem Bereich der Strangführung (1) mit möglichst hoher Temperatur des Stranges (6) zwischen der Trennvorrichtung (3) und dem Ausgleichsofen oder Vorwärmofen (5) angeordnet wird. - Anlage zur Produktion von Flach- oder Langprodukten in einer Produktionsanlage, beispielsweise aus Dickbrammen, Dünnbrammen, Knüppeln, Blooms, Trägervorprofilen oder dergleichen, mit einer Stranggießanlage, umfassend eine Kokille (11), eine Strangführung (1) mit einer Ausziehund Richtmaschine (2), eine Kühlstrecke (4) und eine Trennvorrichtung (3) für den Gussstrang (6), sowie einen nachgeordneten Ausgleichsofen oder Vorwärmofen (5), der in möglichst geringem Abstand hinter der Kühlstrecke (4), und diese in möglichst geringem Abstand hinter der Trennvorrichtung (3) angeordnet ist,
dadurch gekennzeichnet, dass die kühlstrecke (4) mit einer Vielzahl von Hochdruck-Wassersprühdüsen (7) ausgestattet ist, die den Gussstrang (6) allseitig umgeben. - Anlage nach Anspruch 6,
dadurch gekennzeichnet, dass die Kühlstrecke (4) von einem Gehäuse (9) umschlossen ist, dass mit einer Absaugvorrichtung (10), z. B. einem Exhaustor, in Verbindung steht. - Anlage nach einem der Ansprüche 6 oder 7,
dadurch gekennzeichnet, dass die Auszieh- und Richtmaschine (2), die Trennvorrichtung (3) und die Kühlstrecke (4) gemeinsam Innerhalb einer ungeteilten Isolierhaube angeordnet sind.
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 (de) | 2001-08-07 | 2002-08-05 | Verfahren und anlage zur produktion von flach- und langprodukten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1414603A1 EP1414603A1 (de) | 2004-05-06 |
EP1414603B1 true EP1414603B1 (de) | 2005-01-12 |
Family
ID=7694701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02794548A Expired - Lifetime EP1414603B1 (de) | 2001-08-07 | 2002-08-05 | Verfahren und anlage zur produktion von flach- und langprodukten |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1414603B1 (de) |
AT (1) | ATE286792T1 (de) |
DE (2) | DE10138794A1 (de) |
WO (1) | WO2003013763A1 (de) |
Cited By (2)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
UA89895C2 (ru) * | 2006-01-11 | 2010-03-10 | Смс Зімаг Акцієнгезелльшафт | Способ и устройство непрерывного литья |
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)
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 |
-
2001
- 2001-08-07 DE DE10138794A patent/DE10138794A1/de not_active Withdrawn
-
2002
- 2002-08-05 DE DE50202008T patent/DE50202008D1/de not_active Expired - Lifetime
- 2002-08-05 WO PCT/EP2002/008711 patent/WO2003013763A1/de not_active Application Discontinuation
- 2002-08-05 AT AT02794548T patent/ATE286792T1/de active
- 2002-08-05 EP EP02794548A patent/EP1414603B1/de not_active Expired - Lifetime
Cited By (4)
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 |
---|---|
DE10138794A1 (de) | 2003-02-27 |
DE50202008D1 (de) | 2005-02-17 |
EP1414603A1 (de) | 2004-05-06 |
ATE286792T1 (de) | 2005-01-15 |
WO2003013763A1 (de) | 2003-02-20 |
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