US20120297849A1 - Method for hot-rolling a slab and hot-rolling mill - Google Patents

Method for hot-rolling a slab and hot-rolling mill Download PDF

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Publication number
US20120297849A1
US20120297849A1 US13/519,037 US201013519037A US2012297849A1 US 20120297849 A1 US20120297849 A1 US 20120297849A1 US 201013519037 A US201013519037 A US 201013519037A US 2012297849 A1 US2012297849 A1 US 2012297849A1
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United States
Prior art keywords
slab
cooling
hot rolling
cooled
accordance
Prior art date
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Abandoned
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US13/519,037
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English (en)
Inventor
Klaus Berchem
Ingo Schuster
Dirk Schmidt
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SMS Siemag AG
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SMS Siemag AG
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Publication date
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Application filed by SMS Siemag AG filed Critical SMS Siemag AG
Assigned to SMS SIEMAG AKTIENGESELLSCHAFT reassignment SMS SIEMAG AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHMIDT, DIRK, SCHUSTER, INGO, BERCHEM, KLAUS
Publication of US20120297849A1 publication Critical patent/US20120297849A1/en
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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
    • 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
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • 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
    • B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
    • B21B2001/028—Slabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/06—Thermomechanical rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/20—Temperature
    • B21B2261/21—Temperature profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants

Definitions

  • the invention concerns a method for hot rolling a slab, especially a steel slab, wherein the slab is subjected to at least two deformations at different temperatures in a hot rolling mill, and wherein the slab is cooled between two such deformations.
  • the invention also concerns a hot rolling mill for hot rolling a slab.
  • thermomechanical rolling TM process
  • a typical application of this method is the production of hot-rolled steel strip and plate made of microalloyed steels.
  • the goal of this method is to achieve a high degree of homogeneity of the material used to produce the hot-rolled slab, i.e., the material properties should be constant throughout the volume of the material.
  • the temperature homogeneity in the slab during the hot rolling process i.e., the temperature homogeneity in the intermediate slab, must be as high as possible, for this leads to uniform properties in the finished product.
  • the individual rolling operations in the hot rolling occur in several temperature phases, as is typical in thermomechanical rolling, the individual rolling phases are separated by pauses, in which the slab is uniformly cooled to a new, lower temperature. As soon as the target temperature has been reached, the next rolling phase begins.
  • the intermediate slabs it is technologically advantageous for the intermediate slabs to have a uniform temperature.
  • the lateral regions of the slab cool faster than the core. This results in cold edges. These cold edges can cause problems during the subsequent rolling passes. Furthermore, they can impair the properties of the finished product. Since the waiting times between the rolling phases increase with increasing slab thickness, this problem is encountered especially often in the case of thick intermediate slabs.
  • the objective of the present invention is to further develop a method of the aforementioned type and a corresponding rolling mill for carrying out this method, which eliminate the disadvantages described above. This is intended to make it possible to maintain high quality of the intermediate slab and the finished product. In addition, it should be possible to carry out the hot rolling process in an optimal way after the first slab cooling.
  • the objective of the invention with respect to the method is achieved by virtue of the fact that active cooling of the slab is carried out in such a way that the lateral regions of the slab are cooled with lower cooling efficiency than the center region of the slab.
  • the slab is preferably cooled by applying a cooling medium, such that the lateral regions of the slab are at least partly shielded from the cooling medium.
  • the slab can be cooled in an intermediate cooling stand or on a cooling line.
  • the hot rolling of the slab is preferably a multiphase rolling process, especially a thermomechanical rolling process.
  • the proposed hot rolling mill for hot rolling a slab has at least two hot rolling stands, such that at least one cooling station in which the slab can be cooled is arranged either between the hot rolling stands or upstream of the roughing stand.
  • the hot rolling mill is characterized by the fact that the cooling station has means by which the amount of cooling capacity applied to the slab can be varied along the width of the slab in such a way that the lateral regions of the slab are cooled with lower cooling efficiency than the center region of the slab.
  • said means consist of shielding elements designed to shield the lateral regions of the slab from cooling medium.
  • said means consist of a cooling spray bar for applying cooling medium to the slab, such that the width of the jet of cooling medium can be adjusted over the width of the slab.
  • the cooling station is preferably an intermediate cooling stand or a cooling line.
  • an active intermediate cooling is carried out, which is designed in such a way that the lateral regions (edges) of the slab are not cooled along with the center.
  • the hot rolling mill is characterized by the fact that the cooling operation can be controlled, possibly by means of an integrated temperature computing unit, in such a way that the temperature can be prevented from falling below the ferrite precipitation temperature, so that possible undesired ferrite formation can be prevented.
  • the hot rolling mill is characterized by the fact that the proper cooling width is obtained by adjusting it by electrical or mechanical means.
  • FIG. 1 is a schematic side view of a hot rolling mill, which shows only two hot rolling stands with a cooling station arranged between them.
  • FIG. 2 is a schematic view along sectional line A-B in FIG. 1 , showing the upper half of the cooling station.
  • FIG. 3 is an alternative solution in a schematic view along sectional line A-B in FIG. 1 , showing the upper half of the cooling station.
  • FIG. 1 is a sketch of a hot rolling mill 2 , in which a slab 1 can be rolled in a plurality of hot roiling stands 8 , 9 , of which only two are shown here.
  • the slab is conveyed in rolling direction W and rolled in a way that is already well known.
  • the slab is subjected to thermomechanical working.
  • the slab 1 is subjected to a thickness reduction in a first hot rolling stand 8 . Downstream of the stand 8 , the slab 1 is cooled by passing it through a cooling station 7 , which in the present case is designed as an intermediate cooling stand.
  • the slab 1 Downstream of the cooling station 7 , the slab 1 is subjected to another rolling in a hot rolling stand 9 , but now at a lower temperature than in rolling stand 8 .
  • the slab 1 is cooled in the cooling station 7 by spraying it with a cooling medium, here in the form of water. Cooling spray bars 12 , which in themselves are already well known, are used for this purpose.
  • FIG. 2 shows how the cooling of the slab 1 is carried out in accordance with a first embodiment, in which the slab 1 passes in rolling direction W under jets of cooling medium 6 sprayed from the cooling spray bar 12 and is thus cooled (the slab is also cooled by being sprayed from below by a cooling spray bar, although this is not shown in the drawing).
  • shielding plates 10 and 11 are present, which are pushed so far towards the center of the slab in the direction of the double arrows that a sufficiently large lateral region of the slab is shielded from direct contact with cooling medium 6 , while the center region 5 of the slab is exposed to the full cooling effect of the cooling medium.
  • the extent to which the lateral regions 3 , 4 of the slab 1 are to be shielded can be influenced by choosing the position of the shielding plates 10 and 11 , so that all told a homogeneous temperature distribution over the width of the slab 1 can be ensured by the choice of the specified parameters.
  • the width and position of the slab are known from the last centering operation of the slab before the cooling station 7 and can be transferred by the level 2 control system.
  • the shielding plates 10 and 11 are adjusted and positioned accordingly.
  • FIG. 3 shows another embodiment of the present invention, in which a cooling spray bar 12 is used that covers a sufficient width of the slab 1 .
  • the spray bar 12 is provided with slide plates 10 ′, 11 ′ for shielding the marginal regions of the spray bar 12 and, in particular, the nozzles located there, so that the stream of cooling medium can be adjusted to the desired width.
  • the slide plates 10 ′, 11 ′ can be moved in the direction of the double arrow. The effect is the same as in the solution illustrated in FIG. 2 .
  • the lateral regions 3 , 4 of the slab 1 receive less cooling medium, while the center region 5 receives the maximum amount of cooling.
  • edges of the slab can thus be shielded during the active cooling either by “trays” that can be extended (as in the cooling line)—see the solution according to FIG. 2 —or by activating only cooling spray bars whose spray pattern is specifically configured for a specific slab width—see solution according to FIG. 3 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
US13/519,037 2009-12-23 2010-12-06 Method for hot-rolling a slab and hot-rolling mill Abandoned US20120297849A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102009060256A DE102009060256A1 (de) 2009-12-23 2009-12-23 Verfahren zum Warmwalzen einer Bramme und Warmwalzwerk
DE102009060256.9 2009-12-23
PCT/EP2010/068904 WO2011076544A2 (de) 2009-12-23 2010-12-06 Verfahren zum warmwalzen einer bramme und warmwalzwerk

Publications (1)

Publication Number Publication Date
US20120297849A1 true US20120297849A1 (en) 2012-11-29

Family

ID=44072737

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/519,037 Abandoned US20120297849A1 (en) 2009-12-23 2010-12-06 Method for hot-rolling a slab and hot-rolling mill

Country Status (7)

Country Link
US (1) US20120297849A1 (zh)
EP (1) EP2516079B1 (zh)
KR (1) KR101421976B1 (zh)
CN (1) CN102655959B (zh)
DE (1) DE102009060256A1 (zh)
RU (1) RU2528560C2 (zh)
WO (1) WO2011076544A2 (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017177186A (ja) * 2016-03-31 2017-10-05 Ｊｆｅスチール株式会社 鋼板の下面冷却方法および冷却装置
CN110238207A (zh) * 2019-05-29 2019-09-17 北京科技大学 一种用于板带钢控制冷却系统的边部遮蔽装置
US11148182B2 (en) * 2017-03-31 2021-10-19 Nippon Steel Corporation Cooling device for hot rolled steel sheet and cooling method for the same
US11331704B2 (en) 2017-07-24 2022-05-17 Primetals Technologies Austria GmbH Roller framework having a framework cooler for cooling a steel band
US11781198B2 (en) 2016-12-07 2023-10-10 Ebner Industrieofenbau Gmbh Temperature control device for the temperature control of a component

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103551397B (zh) * 2013-10-21 2015-11-04 中冶赛迪上海工程技术有限公司 一种轧制生产线控温装置工艺设备
CN106944492A (zh) * 2016-01-06 2017-07-14 天津皕劼同创精密钛铸造有限公司 一种ta17钛合金板材的制备方法
DE102017220891A1 (de) * 2017-11-22 2019-05-23 Sms Group Gmbh Verfahren zum Kühlen eines metallischen Guts und Kühlbalken
DE102018205685A1 (de) * 2018-04-13 2019-10-17 Sms Group Gmbh Kühleinrichtung und Verfahren zu deren Betrieb

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990006821A1 (en) * 1988-12-15 1990-06-28 Davy Mckee (Sheffield) Limited The operation of a multi-stand hot rolling mill

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JPS5832511A (ja) * 1981-08-21 1983-02-25 Nippon Kokan Kk <Nkk> 厚鋼板の冷却方法
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JPH07150229A (ja) * 1993-11-26 1995-06-13 Kawasaki Steel Corp 熱間厚鋼板の制御冷却装置
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DE19611782C2 (de) * 1996-03-13 1999-08-19 Mannesmann Ag Verfahren und Vorrichtung zum Herstellen eines Hohlkörpers aus massivem Rundstahl
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ITMI20021996A1 (it) * 2002-09-19 2004-03-20 Giovanni Arvedi Procedimento e linea di produzione per la fabbricazione di nastro a caldo ultrasottile sulla base della tecnologia della bramma sottile
DE102008049537A1 (de) * 2008-09-30 2010-04-01 Sms Siemag Aktiengesellschaft Verfahren und Vorrichtung zum Kühlen eines Vorbandes oder Bandes eines Metallstrangs in einem Warmwalzwerk
EP2305392A1 (de) * 2009-10-05 2011-04-06 Siemens Aktiengesellschaft Verfahren zum Walzen von Walzgut und Walzstraße mit wenigstens einem Walzgerüst zum thermomechanischen Walzen von Walzgut
CN102655962B (zh) * 2009-12-08 2015-06-03 本田技研工业株式会社 用于工件的冲压制造方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990006821A1 (en) * 1988-12-15 1990-06-28 Davy Mckee (Sheffield) Limited The operation of a multi-stand hot rolling mill

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017177186A (ja) * 2016-03-31 2017-10-05 Ｊｆｅスチール株式会社 鋼板の下面冷却方法および冷却装置
US11781198B2 (en) 2016-12-07 2023-10-10 Ebner Industrieofenbau Gmbh Temperature control device for the temperature control of a component
US11148182B2 (en) * 2017-03-31 2021-10-19 Nippon Steel Corporation Cooling device for hot rolled steel sheet and cooling method for the same
US11331704B2 (en) 2017-07-24 2022-05-17 Primetals Technologies Austria GmbH Roller framework having a framework cooler for cooling a steel band
US11712725B2 (en) 2017-07-24 2023-08-01 Primetals Technologies Austria GmbH Roller framework having a framework cooler for cooling a steel band
CN110238207A (zh) * 2019-05-29 2019-09-17 北京科技大学 一种用于板带钢控制冷却系统的边部遮蔽装置

Also Published As

Publication number Publication date
RU2528560C2 (ru) 2014-09-20
CN102655959B (zh) 2016-05-18
KR20120102740A (ko) 2012-09-18
EP2516079B1 (de) 2015-02-11
KR101421976B1 (ko) 2014-07-22
DE102009060256A1 (de) 2011-06-30
WO2011076544A3 (de) 2011-08-18
EP2516079A2 (de) 2012-10-31
WO2011076544A2 (de) 2011-06-30
RU2012131155A (ru) 2014-01-27
CN102655959A (zh) 2012-09-05

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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BERCHEM, KLAUS;SCHUSTER, INGO;SCHMIDT, DIRK;SIGNING DATES FROM 20120624 TO 20120723;REEL/FRAME:028732/0272

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