EP0761325B1 - Verfahren und Anlage zur Herstellung von ferritisch warmgewalztem Band - Google Patents
Verfahren und Anlage zur Herstellung von ferritisch warmgewalztem Band Download PDFInfo
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 20
- 238000009434 installation Methods 0.000 title abstract 2
- 238000005096 rolling process Methods 0.000 claims abstract description 68
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 238000004804 winding Methods 0.000 claims description 7
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 2
- 238000005097 cold rolling Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000000047 product Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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.
Description
Claims (6)
- Produktionsanlage (1) zur Erzeugung von warmgewalzten Flachprodukten (2, 7), bestehend aus einer mehrgerüstigen Walzstraße (3), einem Auslaufrollgang (4) mit Einrichtungen (9) zur Kühlung des Warmbandes und nachgeordneten Wickelmaschinen (5) zum Aufwickeln des Bandes, wobei in Walzrichtung (14) gesehen hinter den Wickelmaschinen (5) zum kontinuierlichen Durchgang eine zusätzliche kompakte Umformstufe (6) in Form eines ein- oder mehrgerüstigen Walzwerks für das Walzen dünner Bänder (7) angeordnet ist und daß die in Walzrichtung (14) gesehen erste mehrgerüstige Walzstraße (3) für die Walzung im austenitischen Temperaturbereich und die in Walzrichtung (14) gesehen zweite ein- oder mehrgerüstige Walzstraße (6) für die Walzung im ferritischen Temperaturbereich einsetzbar ist und die Abkühleinrichtung (9) für die Kühlung des Warmbandes (2) aus dem austenitischen in den ferritischen Temperaturbereich im Bereich des Kühlrollganges (4) zwischen den beiden Walzstraßen (3, 6) angeordnet ist, wobei femer der Durchmesser der Arbeitswalzen (10) der zweiten Gerüstgruppe (6) weniger als 800 mm, bevorzugt weniger als 400 mm beträgt und die zweite Gerüstgruppe (6) für die Walzung des Warmbandes (2) im ferritischen Temperaturbereich mit Stell- und Regelkreisen zur Erzielung von Bandtoleranzen für Dicke und Planheit wie in Kaltwalzgerüsten ausgestattet ist.
- Produktionsanlage nach Anspruch 1,
dadurch gekennzeichnet, daß unmittelbar hinter der kompakten Umformstufe (6) spezielle Wickelmaschinen (8) für das Wickeln dünner Bänder (7) angeordnet sind. - Produktionsanlage nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß vor der zweiten ein- oder mehrgerüstigen Walzstraße (6) eine beheizte Speichereinrichtung vorgesehen ist. - Produktionsanlage nach mindestens einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß die Walzgerüste der kompakten Umformstufe (6) als Quarto-Gerüst (6.1) oder Sexto-Gerüst (6.2) ausgeführt sind. - Produktionsanlage nach mindestens einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß bei Einsatz von Arbeitswalzendurchmessern weniger als 400 mm die Arbeitswalzen (10) über die Stützwalzen (11) bzw. über die Zwischenwalzen (14) antreibbar sind. - Verfahren zur Erzeugung warmgewalzter Flachprodukte mit einer Produktionsanlage bestehend aus einer mehrgerüstigen Walzstraße (3), einem Auslaufrollgang (4) mit Einrichtungen (9) zur Kühlung des Warmbandes und mit nachgeordneten Wickelmaschinen (5) zum Aufwickeln des Bandes (2) nach mindestens einem der vorhergehenden Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß zwecks Walzen des Flachproduktes im austenitischen und ferritischen Gebiet der Wickelmaschine (5) eine zweite Gerüstgruppe (6) nachgeordnet wird und daß die zwei Walzgerüstgruppen (3, 6) miteinander kontinuierlich in der Weise arbeiten, daß sich Teile eines Warmbandes (2) gleichzeitig in beiden Gerüstgruppen (3, 6) befinden, wobei in der ersten Gerüstgruppe (3) das Warmband (2) im austenitischen Temperaturgebiet umgeformt wird und anschließend das Warmband (2) in der zweiten Gerüstgruppe (6) im ferritischen Temperaturgebiet umgeformt wird.
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 (de) | 1997-03-12 |
EP0761325B1 true EP0761325B1 (de) | 2001-11-28 |
Family
ID=7770535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96113056A Expired - Lifetime EP0761325B1 (de) | 1995-08-25 | 1996-08-14 | Verfahren und Anlage zur Herstellung von ferritisch warmgewalztem Band |
Country Status (12)
Country | Link |
---|---|
US (1) | US5771731A (de) |
EP (1) | EP0761325B1 (de) |
JP (1) | JP3883614B2 (de) |
KR (1) | KR100424528B1 (de) |
CN (1) | CN1081961C (de) |
AT (1) | ATE209537T1 (de) |
CA (1) | CA2183950C (de) |
DE (2) | DE19531538A1 (de) |
ES (1) | ES2169184T3 (de) |
MY (1) | MY118124A (de) |
RU (1) | RU2179083C2 (de) |
TW (1) | TW311890B (de) |
Families Citing this family (10)
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 (de) | 2009-09-24 | 2011-03-30 | Siemens Aktiengesellschaft | Walzverfahren mit optimierter strain penetration |
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2000642B1 (de) * | 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 |
JPS62230403A (ja) * | 1985-12-12 | 1987-10-09 | Kawasaki Steel Corp | 薄鋼板製造設備列 |
US4793401A (en) * | 1985-12-12 | 1988-12-27 | Kawasaki Steel Corporation | Method of producing thin steel sheets having an improved processability |
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 (de) * | 1991-07-17 | 1998-11-11 | CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif | Verfahren zur Herstellung eines dünnen Bandes aus Weichstahl |
JPH0655202A (ja) * | 1992-08-07 | 1994-03-01 | Kawasaki Steel Corp | 温間圧延鋼板の圧延方法 |
ES2112440T3 (es) * | 1993-05-17 | 1998-04-01 | Danieli Off Mecc | Linea para producir banda y/o plancha. |
-
1995
- 1995-08-25 DE DE19531538A patent/DE19531538A1/de not_active Ceased
-
1996
- 1996-07-11 TW TW085108393A patent/TW311890B/zh active
- 1996-08-14 EP EP96113056A patent/EP0761325B1/de not_active Expired - Lifetime
- 1996-08-14 ES ES96113056T patent/ES2169184T3/es not_active Expired - Lifetime
- 1996-08-14 AT AT96113056T patent/ATE209537T1/de active
- 1996-08-14 DE DE59608302T patent/DE59608302D1/de not_active Expired - Lifetime
- 1996-08-19 JP JP21748696A patent/JP3883614B2/ja not_active Expired - Fee Related
- 1996-08-22 CA CA002183950A patent/CA2183950C/en not_active Expired - Fee Related
- 1996-08-22 US US08/704,005 patent/US5771731A/en not_active Expired - Lifetime
- 1996-08-23 MY MYPI96003478A patent/MY118124A/en unknown
- 1996-08-23 RU RU96117004/02A patent/RU2179083C2/ru not_active IP Right Cessation
- 1996-08-23 CN CN96112270A patent/CN1081961C/zh not_active Expired - Fee Related
- 1996-08-23 KR KR1019960034992A patent/KR100424528B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR100424528B1 (ko) | 2004-05-20 |
KR19980015600A (ko) | 1998-05-25 |
MY118124A (en) | 2004-09-30 |
TW311890B (de) | 1997-08-01 |
JPH09122708A (ja) | 1997-05-13 |
DE19531538A1 (de) | 1997-02-27 |
JP3883614B2 (ja) | 2007-02-21 |
ATE209537T1 (de) | 2001-12-15 |
CA2183950A1 (en) | 1997-02-26 |
CN1153685A (zh) | 1997-07-09 |
RU2179083C2 (ru) | 2002-02-10 |
CN1081961C (zh) | 2002-04-03 |
ES2169184T3 (es) | 2002-07-01 |
CA2183950C (en) | 2007-04-24 |
US5771731A (en) | 1998-06-30 |
DE59608302D1 (de) | 2002-01-10 |
EP0761325A1 (de) | 1997-03-12 |
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