EP0761325B1 - Installation et procédé pour la production d'une bande d'acier ferritique laminée à chaud - Google Patents

Installation et procédé pour la production d'une bande d'acier ferritique laminée à chaud Download PDF

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Publication number
EP0761325B1
EP0761325B1 EP96113056A EP96113056A EP0761325B1 EP 0761325 B1 EP0761325 B1 EP 0761325B1 EP 96113056 A EP96113056 A EP 96113056A EP 96113056 A EP96113056 A EP 96113056A EP 0761325 B1 EP0761325 B1 EP 0761325B1
Authority
EP
European Patent Office
Prior art keywords
rolling
stand
strip
cooling
hot
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
EP96113056A
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German (de)
English (en)
Other versions
EP0761325A1 (fr
Inventor
Wolfgang Prof. Dr. Rohde
Manfred Albedyhl
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP0761325A1 publication Critical patent/EP0761325A1/fr
Application granted granted Critical
Publication of EP0761325B1 publication Critical patent/EP0761325B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/04—Ferritic rolling

Definitions

  • the invention relates to a production plant for the production of hot-rolled flat products, consisting of a multi-stand Rolling mill, an outfeed roller table with facilities for cooling the Hot strip and with downstream winding machines for winding of the tape.
  • Rolling plants for the production of hot-rolled strips are today in the generally designed and operated so that the deformation in the individual scaffolding is austenitic, which means that it is ensured that the rolling temperatures in the individual rolling stands lie above the GOS line of the iron carbon diagram.
  • First after the last rolling pass, which is used to achieve a fine-grained Final structure should be as close as possible to the GOS line cooling to the reel temperature with structural change in the Cooling section or in the wound bundle.
  • the final rolling temperature for rolling that means the temperature in the last mill stand Rolling mill at 840 to 920 ° C depending on the level of carbon.
  • the final rolling temperature is maintained by selecting the final rolling speed, with which the natural cooling of the tape in the Rolling mill and the heat supply by the drive power of the Roll stands can be controlled.
  • This procedure is straightforward applicable for strip thicknesses above a minimum strip thickness, each is of the order of 1.3 mm depending on the road type. Will this Strip thickness is undershot, the required rolling speed is reached with values above 12 m per second, not in the free run on the roller table behind the rolling mill can be mastered more.
  • a preferred method sees pre-rolling in austenitic Range up to an intermediate thickness of 2 to 8 mm and one finish roll in the ferritic range to the lowest final thicknesses below of 1.3 mm in front.
  • the rolling stock must be between the two process stages from the final rolling temperature in the austenitic range to the rolling temperature be cooled in the ferritic range. This means one Cooling from the temperature range of 840 to 920 ° C to the Temperature range from 600 to 780 ° C.
  • the finish rolling temperature is after the second deformation stage also in the range of 600 to 780 ° C and thus on the order of magnitude, in which recrystallization of the Structure occurs in the wound bundle.
  • a structure is created which means the use of the product without further cold forming or Allows heat treatment.
  • the process described above is implemented in one conventionally designed hot strip mill considerable difficulties.
  • the transition from austenitic to ferritic Forming should be carried out in the thickness range from 2 to 8 mm, that is, in a thickness range in which the rolling stock is roughly in in the middle of a conventional finishing train. Because the lead time from scaffolding to scaffolding at this point only a few seconds is, in principle, it is possible to implement cooling, however, adherence to the time required for the conversion cannot be realized. Carrying out ferritic rolling according to the method described is conventional for that designed hot strip mill impossible.
  • EP-A-226 446 which also belongs to the prior art a production plant for the production of hot-rolled flat products described with a final thickness of 2 to 6 mm.
  • the production plant is at very high speeds, namely not rolled less than 1,500 m / min. That in this production facility
  • the end product produced has in no way a structure that is similar to a cold rolled product.
  • Essential objective this previously known production facility is the increase in throughput and the production of a rolled product with good properties for further treatment.
  • the rolled product itself is not of too high quality.
  • a process is known from EP-A2-0 524 162 known for rolling out hot strip to a thickness of 0.5 to 2 mm, in a last roll stand, the steel at or below 750 ° is rolled out and this rolling temperature by roller cooling in last scaffold is set.
  • From the German published application 1 903 554 is a process for producing hot rolled Strip steel is known, being after a conventional hot rolling steel strip on a normal hot rolling mill similar to the document EP-A2-0 524 162 an additional Hot rolling operation at below 700 ° C follows. An austenitic Rolling process and / or a ferritic rolling process is with this previously known methods not possible.
  • the object of the invention therein, a production plant for the ferritic rolling of hot strip to create with the aforementioned disadvantages and problems be eliminated.
  • the object of the invention is also a method To provide with the finishing rolling of hot strip in ferritic Range is easily enabled.
  • the task is solved in a production plant of type mentioned with the invention in that in the rolling direction seen behind the winding machines for continuous passage an additional compact forming stage in the form of a single or Multi-stand rolling mill arranged for rolling thin strips is and that the first multi-stand rolling mill seen in the rolling direction for rolling in the austenitic temperature range and seen in the rolling direction second single or multi-stand rolling mill can be used for rolling in the ferritic temperature range and that the cooling device for cooling the hot strip the austenitic in the ferritic temperature range in the range of the roller table is arranged between the two rolling mills (cf. Figure).
  • This rolling mill is specially designed for ferritic forming Area designed. This includes equipping with work roll diameters of less than 500 mm and with positioning and Control loops to achieve strip tolerances for thickness and flatness, as required by cold rolled products.
  • the conventional process takes over the entire rolling process designed hot strip mill 3 to create an intermediate thickness through rolling in the austenitic area and the compact ferritic Forming stage 6 the final rolling in the ferritic range.
  • the cooling of the strip with intermediate thickness from the austenitic area in the The ferritic range occurs in the simplest way when passing through the run-out roller table 4 between the austenitic forming step 3 and the ferritic forming stage 6. Due to the length of this Roller table, which is used for cooling austenitic rolled strips Reel temperature is to be designed, lead times result in the case of ferritic rolling, the cooling normally required and ensure the conversion of austenite to ferrite.
  • the for the austenitic rolling process existing cooling devices 9 can, if necessary, in addition to achieving the required Cooling rate can be used. Should the lead time of the last austenitic transformation 3.1 to the first ferritic Forming 6.1 for a sufficient conversion of austenite into Ferrite will not be sufficient, so a heated loop storage (not shown) provided the immediately between the conventional coiler 5 and the compact ferritic Forming stage 6 is to be arranged.
  • the hot strip production plant shown in the single figure 1 for austenitic and ferritic rolling is before the first multi-stand mill 3 a roughing mill, not shown 12 or a thin slab furnace with casting machine 13 upstream.
  • the invention results in an overall system concept, which in optimally both the austenitic process and the allows ferritic rolling process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Laminated Bodies (AREA)
  • Winding Of Webs (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Claims (6)

  1. Installation de production (1) pour la production de produits plats (2, 7) laminés à chaud, constituée d'un train de laminage (3) à plusieurs cages, un train de rouleaux de sortie (4) présentant des dispositifs (9) pour le refroidissement de la bande chaude et des bobineuses (5) placées en aval pour l'enroulement de la bande, une étape de transformation (6) supplémentaire compacte étant disposée en aval des bobineuses, vu dans le sens du laminage, pour un passage continu, sous forme d'un laminoir à une ou plusieurs cages pour le laminage de bandes plus minces (7) et le premier train de laminage (3), vu dans le sens du laminage (14), à plusieurs cages pouvant être utilisé pour le laminage dans la zone de température austénitique et le deuxième train de laminage (6), vu dans le sens du laminage, à une ou plusieurs cages pouvant être utilisé pour le laminage dans la zone de température ferritique et le dispositif de refroidissement (9) pour le refroidissement de la bande chaude (2) de la zone de température austénitique dans la zone de température ferritique étant disposé dans la zone du train de rouleaux de refroidissement (4) ente les deux trains de laminage (3, 6), le diamètre les cylindres de travail (10) du deuxième groupe de cages (6) étant en outre inférieur à 800 mm, de préférence inférieur à 400 mm et le deuxième groupe de cages (6) étant équipé pour le laminage de la bande chaude (2) dans la zone de température ferritique avec des circuits de réglage et de régulation pour la réalisation des tolérances de bande en épaisseur et planéité comme dans les cages de laminage à froid.
  2. Installation de production selon la revendication 1, caractérisée en ce que des bobineuses spéciales (8) pour le bobinage de bandes plus minces (7) sont disposées directement en aval l'étape de transformation compacte (6).
  3. Installation de production selon la revendication 1 ou 2, caractérisée en ce qu'on a prévu en amont du deuxième train de laminage (6) à une ou plusieurs cages un dispositif d'alimentation chauffé.
  4. Installation de production selon au moins l'une quelconque des revendications 1 à 3, caractérisée en ce que les cages de laminage de l'étape de transformation compacte (6) sont équipées comme cage quarto (6.1) ou sexto (6.2).
  5. Installation de production selon au moins l'une quelconque des revendications 1 à 4, caractérisée en ce que lors de l'utilisation de diamètres de cylindres de travail inférieurs à 400 mm, les cylindres de travail (10) peuvent être entraínés via les cylindres de support (11) ou les cylindres intermédiaires (14).
  6. Procédé pour la production de produits plats laminés à froid avec une installation de production constituée d'un train de laminage (3) à plusieurs cages, un train de rouleaux de sortie (4) présentant des dispositifs (9) pour le refroidissement de la bande chaude et des bobineuses (5) placées en aval pour l'enroulement de la bande (2) selon au moins l'une quelconque des revendications précédentes 1 à 7, caractérisée en ce que, pour le laminage du produit plat dans la zone austénitique et ferritique de la bobineuse (5), une deuxième groupe de cages (6) est disposé en aval et en ce que les deux groupes de cages de laminage (3, 6) travaillent l'un avec l'autre en continu de telle manière que des parties d'une bande chaude (2) se trouvent simultanément dans deux cages de laminage (3, 6), la bande chaude (2) étant transformée dans le premier groupe de cages (3) dans la zone de température austénitique et la bande chaude (2) étant ensuite transformée dans le deuxième groupe de cages (6) dans la zone de température ferritique.
EP96113056A 1995-08-25 1996-08-14 Installation et procédé pour la production d'une bande d'acier ferritique laminée à chaud Expired - Lifetime EP0761325B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19531538A DE19531538A1 (de) 1995-08-25 1995-08-25 Warmbandproduktionsanlage für ferritisches Walzen und Verfahren zur Erzeugung von ferritischem Walzband
DE19531538 1995-08-25

Publications (2)

Publication Number Publication Date
EP0761325A1 EP0761325A1 (fr) 1997-03-12
EP0761325B1 true EP0761325B1 (fr) 2001-11-28

Family

ID=7770535

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96113056A Expired - Lifetime EP0761325B1 (fr) 1995-08-25 1996-08-14 Installation et procédé pour la production d'une bande d'acier ferritique laminée à chaud

Country Status (12)

Country Link
US (1) US5771731A (fr)
EP (1) EP0761325B1 (fr)
JP (1) JP3883614B2 (fr)
KR (1) KR100424528B1 (fr)
CN (1) CN1081961C (fr)
AT (1) ATE209537T1 (fr)
CA (1) CA2183950C (fr)
DE (2) DE19531538A1 (fr)
ES (1) ES2169184T3 (fr)
MY (1) MY118124A (fr)
RU (1) RU2179083C2 (fr)
TW (1) TW311890B (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1290743B1 (it) * 1997-04-10 1998-12-10 Danieli Off Mecc Procedimento di laminazione per prodotti piani con spessori sottili e relativa linea di laminazione
GB2327375A (en) * 1997-07-21 1999-01-27 Kvaerner Metals Cont Casting Continuous metal manufacturing method and apparatus therefore
DE19758108C1 (de) * 1997-12-17 1999-01-14 Mannesmann Ag Produktionsverfahren und -anlage zur endlosen Erzeugung von warmgewalzten dünnen Flachprodukten
DE19903926A1 (de) * 1999-02-01 2000-08-03 Sms Demag Ag Verfahren und Anlage zum Umformen von Metallband
FR2792857B1 (fr) * 1999-04-28 2001-07-27 Kvaerner Metals Clecim Procede de fabrication, en continu, d'une bande metallique
US20050115649A1 (en) * 2003-03-27 2005-06-02 Tokarz Christopher A. Thermomechanical processing routes in compact strip production of high-strength low-alloy steel
EP2301684A1 (fr) 2009-09-24 2011-03-30 Siemens Aktiengesellschaft Procédé de laminage doté d'une pénétration de contrainte optimisée
AT509707B1 (de) * 2010-05-04 2011-11-15 Siemens Vai Metals Tech Gmbh Verfahren zum warmwalzen von stahlbändern und warmwalzstrasse
CN106391710B (zh) * 2016-09-27 2018-07-31 武汉钢铁有限公司 薄板坯连铸连轧产线小批量产品的生产方法及控制装置
CN113996651A (zh) * 2021-10-29 2022-02-01 马鞍山钢铁股份有限公司 一种低碳钢及提高csp流程铁素体轧制低碳钢性能均匀性的制造方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2000642B1 (fr) * 1968-01-24 1973-04-06 Sumitomo Metal Ind
DE2613459A1 (de) * 1976-03-30 1977-10-13 Schloemann Siemag Ag Verfahren und anlage zur vermeidung des schrottanfalles in kontinuierlichen breitbandstrassen
US4793401A (en) * 1985-12-12 1988-12-27 Kawasaki Steel Corporation Method of producing thin steel sheets having an improved processability
JPS62230403A (ja) * 1985-12-12 1987-10-09 Kawasaki Steel Corp 薄鋼板製造設備列
JPH0446608A (ja) * 1990-06-12 1992-02-17 Kawasaki Steel Corp 多段熱間圧延機
US5133205A (en) * 1990-11-13 1992-07-28 Mannesmann Aktiengesellschaft System and process for forming thin flat hot rolled steel strip
EP0524162B1 (fr) * 1991-07-17 1998-11-11 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Procédé de fabrication d'une bande mince en acier doux
JPH0655202A (ja) * 1992-08-07 1994-03-01 Kawasaki Steel Corp 温間圧延鋼板の圧延方法
DE69408595T2 (de) * 1993-05-17 1998-10-15 Danieli Off Mecc Produktionslinie zur Herstellung von Bändern und/oder Blechen

Also Published As

Publication number Publication date
ES2169184T3 (es) 2002-07-01
TW311890B (fr) 1997-08-01
RU2179083C2 (ru) 2002-02-10
MY118124A (en) 2004-09-30
CN1153685A (zh) 1997-07-09
JP3883614B2 (ja) 2007-02-21
KR19980015600A (ko) 1998-05-25
JPH09122708A (ja) 1997-05-13
CA2183950C (fr) 2007-04-24
CA2183950A1 (fr) 1997-02-26
US5771731A (en) 1998-06-30
DE59608302D1 (de) 2002-01-10
ATE209537T1 (de) 2001-12-15
DE19531538A1 (de) 1997-02-27
CN1081961C (zh) 2002-04-03
EP0761325A1 (fr) 1997-03-12
KR100424528B1 (ko) 2004-05-20

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