WO2003097263A1 - Procede et dispositif de refroidissement d'une feuille d'acier, et procede de fabrication d'une feuille d'acier - Google Patents

Procede et dispositif de refroidissement d'une feuille d'acier, et procede de fabrication d'une feuille d'acier Download PDF

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Publication number
WO2003097263A1
WO2003097263A1 PCT/JP2003/005933 JP0305933W WO03097263A1 WO 2003097263 A1 WO2003097263 A1 WO 2003097263A1 JP 0305933 W JP0305933 W JP 0305933W WO 03097263 A1 WO03097263 A1 WO 03097263A1
Authority
WO
WIPO (PCT)
Prior art keywords
steel sheet
cooling
steel
lower rolls
force
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.)
Ceased
Application number
PCT/JP2003/005933
Other languages
English (en)
Japanese (ja)
Inventor
Akio Fujibayashi
Akira Tagane
Satoshi Ueoka
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.)
JFE Steel Corp
Original Assignee
JFE Steel Corp
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 JFE Steel Corp filed Critical JFE Steel Corp
Priority to DE60324272T priority Critical patent/DE60324272D1/de
Priority to EP03728060A priority patent/EP1508388B1/fr
Priority to KR1020047009443A priority patent/KR100598006B1/ko
Publication of WO2003097263A1 publication Critical patent/WO2003097263A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0071—Levelling the rolled product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/006—Pinch roll sets
    • 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
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices
    • B21B45/0278—Cleaning devices removing liquids
    • B21B45/0281—Cleaning devices removing liquids removing coolants
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/673—Quenching devices for die quenching

Definitions

  • the present invention relates to a method for cooling a hot-rolled steel sheet, and more particularly to a method for uniformly cooling a steel sheet without warping or buckling of the steel sheet during cooling.
  • the present invention relates to a cooling method, an apparatus thereof, and a method for manufacturing a steel sheet using the method.
  • the steel sheet after hot rolling is conveyed so that the steel sheet surface is horizontal, and is cooled by cooling water injected from above and below the steel sheet surface.
  • uneven cooling of the steel sheet is likely to occur, causing not only residual stress of the steel sheet and dispersion of the material, but also warping of the steel sheet to cause trouble in operation.
  • warped steel sheets require a refining process to correct the warpage with a press machine or the like, which leads to an increase in cost.
  • TMCP controlled rolling and controlled cooling
  • the width of the steel sheet is as large as 5 m, and the cooling water from the cooling device is prevented from flowing out to the parts of the steel sheet that do not need to be cooled.
  • the issue is how to achieve uniform cooling by so-called "water drainage”.
  • Japanese Utility Model Application Laid-Open No. 53-39508 discloses a technique in which an air nozzle is disposed on the upper surface of a steel plate so as to be movable up and down, and the drainage is performed by air emitted from the air. ing.
  • Japanese Utility Model Application Laid-Open No. 58-125611 discloses a method of draining water by pressing a steel sheet with a rubber roll.
  • Japanese Patent Application Laid-Open No. 60-206516 discloses that a 7_K cutting roll and a downstream side thereof are provided along the width direction of the steel sheet.
  • a water injection nozzle is provided and water is injected from a central portion in the width direction of the steel sheet toward both ends and a drain roll to drain the steel sheet.
  • the amount of warpage and the direction of warpage are determined by differences in sheet width, sheet thickness, upper and lower surface temperatures, and temperature histories.However, when this warpage occurs, a gap is created between the steel sheet and the draining roll. A large amount of cooling water flows out, and it becomes difficult to reduce the amount of cooling water to 7 k.
  • the amount of warpage in the longitudinal direction is determined not only by the sheet width, the sheet thickness, the temperature of the upper and lower surfaces, the temperature history, but also by the transfer speed of the steel sheet. As a result, the steel sheet cannot be transported, causing operational problems. In addition, there is a large warp after the steel sheet passes through the cooling device.
  • Japanese Patent Application Laid-Open No. Hei 10-263670 discloses a technique for cooling while restraining the steel sheet surface during cooling so that warpage in the width direction does not occur.
  • the steel sheet is cooled while being restrained with a certain force or more, so it is possible to cool the steel sheet while keeping it flat.
  • An object of the present invention is to provide a method for uniformly cooling a hot-rolled steel sheet without warping due to cooling unevenness and buckling due to a restraining force, an apparatus thereof, and a method for manufacturing a steel sheet using the method. 3 ⁇ 4 ⁇ to do.
  • the purpose is to convey the steel sheet horizontally while constraining the steel sheet surface with a plurality of sets of upper and lower rolls, and to water-cool the conveyed steel sheet from above and below the steel sheet surface.
  • This is achieved by a method of cooling a steel sheet, wherein the binding force of the steel sheet by the upper and lower rolls is not less than PI (t) and less than P2 (t) shown by the following equations (1) and (2).
  • FIG. 1 is a diagram showing an example of a steel plate cooling device of the present invention.
  • BEST MODE FOR CARRYING OUT THE INVENTION FIG. 1 shows an example of a steel sheet cooling device of the present invention.
  • the steel sheet 1 immediately after rolling is conveyed while being constrained between 20 sets of upper and lower jaws comprising an upper roll 2 and a lower roll 3 arranged at an interval of lm.
  • the upper surface of the steel plate is cooled by the cooling water from the slit nozzle 4, and the lower surface of the steel plate is cooled by the cooling water from the circular tube nozzle 5, respectively.
  • FIG. 1 three upper rolls 2 and two cooling zones are shown. The pitch between the upper and lower rolls is lm.
  • the upper roll 2 has a diameter of 250 and can move up and down at a pitch of 0.5 mm up and down.
  • the gap between the upper roll 2 and the lower roll 3 is set to be equal to or less than the thickness of the steel sheet 1.
  • a force is applied to the steel sheet 1 by a reaction force against the pressing force of the hydraulic cylinder 6 when the upper roll 2 passes.
  • Steel plate 1 is bound. Further, this restraining force is measured by a pressure sensor, and when the value exceeds a value described later, the pressure of the hydraulic cylinder 6 is adjusted.
  • the pressure of the hydraulic cylinder 6 is adjusted, the restraining force corresponding to the pressure acts on the steel plate 1, and the upper roll 2 moves up and down along with the steel plate 1 according to the reaction force from the steel plate 1. Can be.
  • a mechanism is provided to quickly move the upper roll 2 upward when the position of the upper roll 2 exceeds a certain value.
  • a drainer spray nozzle 7 is provided for removing cooling water leaking from a gap between the upper roll 2 and the steel plate 1 from the end of the steel plate.
  • the upper and lower surfaces of the steel sheet are cooled at a water volume of 2 m 3 / min or more per unit area while restraining the steel sheet by setting the binding force of the steel sheet by the upper and lower rolls per set to PI (t) or more and less than P2 (t). If the temperature is diffused, the temperature deviation is eliminated, no warpage occurs, and the drainage can be performed without fail, resulting in no uneven cooling. Therefore, even if the steel sheet is not restrained after cooling, a flat state can be obtained.
  • the steel plate buckles, and at that time the steel plate is kept flat, but when water cooling is stopped, the steel plate warps and becomes unable to be conveyed in the cooling device, Damaged equipment or significant distortion left after exiting cooling system.
  • the steel sheet is transported in the cooling device by moving multiple sets of upper and lower rolls up and down according to the warpage of the steel sheet while pressing with a force less than P2 (t). It will not damage the equipment. Furthermore, after leaving the cooling device, for example, when cooling on the cooling floor, no large distortion remains. On the other hand, when the cooling becomes an imbalance and the steel sheet is about to be warped and pressed against the steel sheet with a large restraining force, reverse warpage occurs in the cooling device, or when the steel sheet leaves the cooling device. Warps more than expected.
  • the pressure sensor detects the reaction force.
  • the pressure applied to the hydraulic cylinder 6 is reduced until the restraining force becomes less than P2 (t>).
  • the upper roll rises, where the steel sheet is passed in this state so as not to hinder the conveyance of the steel sheet.
  • the cylinder pressure is reduced, and the upper roll is raised by a certain height, for example, 300 mm.
  • the reaction force (restraining force) from the steel sheet is still P 2 (t) or more, the upper roll is quickly released, the restraining force is reduced to zero, and the force is lifted upward.
  • the cooling water on the lower or upper surface is not sprayed for some reason or is not sprayed at a predetermined flow rate, so that the cooling of the steel plate is vertically asymmetric and a large temperature difference occurs between the upper and lower surfaces of the steel plate. If this temperature difference Therefore, the reaction force from the steel plate that lifts the upper roll greatly exceeds P2 (t) and pushes the upper roll 2 upward. If it is possible to make i ⁇ ⁇ ⁇ ⁇ S, equipment troubles and equipment damage can be prevented.
  • the above description relates to the restraining force of one set of upper and lower rolls. However, if the restraining force of the other upper and lower rolls is equal to or higher than P2 (t), the above measures may be taken.
  • Each of the steel sheets cooled by the method of the present invention passed through the cooling device without any problem, and maintained a good shape even after being cooled to room temperature by the cooling floor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Metal Rolling (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

L'invention concerne un procédé de refroidissement d'une feuille d'acier, qui consiste à: acheminer horizontalement la feuille d'acier pendant que sa surface est arrêtée par plusieurs ensembles de rouleaux supérieurs et inférieurs; et refroidir à l'eau la feuille d'acier pendant que sa surface est déplacée dans les sens amont et aval. Une force d'arrêt de la feuille d'acier (t), exercée par les rouleaux supérieurs et inférieurs pour chaque ensemble, est de P1 (= 6,85 x 10-7S3L0,65) à moins de P2 (= 1,2 x 106S3L0,65), L (mm) étant une distance comprise entre les ensembles des rouleaux supérieurs et inférieurs adjacents, et S (mm) étant l'épaisseur de la feuille d'acier. Ainsi, la feuille d'acier laminée à chaud peut être refroidie de manière uniforme sans gauchissement imputable à un refroidissement non uniforme ou à un flambage provoqué par la force d'arrêt.
PCT/JP2003/005933 2002-05-17 2003-05-13 Procede et dispositif de refroidissement d'une feuille d'acier, et procede de fabrication d'une feuille d'acier Ceased WO2003097263A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE60324272T DE60324272D1 (de) 2002-05-17 2003-05-13 Verfahren zum kühlen von stahlblech und verfahren zur herstellung von stahlblech
EP03728060A EP1508388B1 (fr) 2002-05-17 2003-05-13 Procede de refroidissement d'une feuille d'acier, et procede de fabrication d'une feuille d'acier
KR1020047009443A KR100598006B1 (ko) 2002-05-17 2003-05-13 강판의 냉각방법, 강판의 냉각장치 및 강판의 제조방법

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002/142482 2002-05-17
JP2002142482A JP3925789B2 (ja) 2002-05-17 2002-05-17 高温鋼板の冷却方法、高温鋼板の冷却装置、及び鋼板の製造方法

Publications (1)

Publication Number Publication Date
WO2003097263A1 true WO2003097263A1 (fr) 2003-11-27

Family

ID=29544985

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Application Number Title Priority Date Filing Date
PCT/JP2003/005933 Ceased WO2003097263A1 (fr) 2002-05-17 2003-05-13 Procede et dispositif de refroidissement d'une feuille d'acier, et procede de fabrication d'une feuille d'acier

Country Status (7)

Country Link
EP (1) EP1508388B1 (fr)
JP (1) JP3925789B2 (fr)
KR (1) KR100598006B1 (fr)
CN (1) CN1290634C (fr)
DE (1) DE60324272D1 (fr)
TW (1) TWI222903B (fr)
WO (1) WO2003097263A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007007676A (ja) * 2005-06-29 2007-01-18 Jfe Steel Kk 厚板圧延ラインにおける被圧延材の冷却方法ならびにそれを用いた厚板圧延方法
DE102007057278A1 (de) * 2007-08-04 2009-02-05 Sms Demag Ag Verfahren und Vorrichtung zur Vergleichmäßigung des Wärmeübergangs eines Gussprodukts während seiner Erstattung auf dem Metalltransportband einer horizontalen Bandgießanlage
JP5353260B2 (ja) * 2009-01-19 2013-11-27 Ｊｆｅスチール株式会社 高強度厚肉熱延鋼板の巻き取り設備および巻き取り方法
CN102676787B (zh) * 2012-06-15 2014-04-16 中冶赛迪工程技术股份有限公司 一种金属薄板淬火装置
KR101666814B1 (ko) 2015-07-21 2016-10-17 주식회사 포스코 냉각수 제어 장치
JP6720894B2 (ja) 2017-03-02 2020-07-08 Ｊｆｅスチール株式会社 鋼板の冷却方法および鋼板の冷却装置ならびに鋼板の製造方法
CN107557550B (zh) * 2017-08-22 2019-07-16 大连理工大学 一种变强度高强度钢汽车零件制备方法
EP3653312B1 (fr) * 2017-09-28 2022-08-17 JFE Steel Corporation Équipement de fabrication de plaque d'acier et procédé de fabrication de plaque d'acier
CN108515380A (zh) * 2018-03-05 2018-09-11 蚌埠市大禹机床制造有限公司 一种自动感应输送的切割机床

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10263670A (ja) * 1997-03-26 1998-10-06 Nkk Corp 高温鋼板の冷却方法及び高温鋼板の冷却装置
JPH11290933A (ja) * 1998-04-10 1999-10-26 Nkk Corp 高温鋼板の冷却方法および装置
JP2000001719A (ja) * 1998-06-16 2000-01-07 Nkk Corp 高温鋼板の冷却装置
WO2001064362A1 (fr) * 2000-03-01 2001-09-07 Nkk Corporation Dispositif et procede de refroidissement d'une bande d'acier laminee a chaud et procede de fabrication de cette bande d'acier laminee a chaud

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3282713B2 (ja) * 1997-06-27 2002-05-20 日本鋼管株式会社 高温鋼板の冷却方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10263670A (ja) * 1997-03-26 1998-10-06 Nkk Corp 高温鋼板の冷却方法及び高温鋼板の冷却装置
JPH11290933A (ja) * 1998-04-10 1999-10-26 Nkk Corp 高温鋼板の冷却方法および装置
JP2000001719A (ja) * 1998-06-16 2000-01-07 Nkk Corp 高温鋼板の冷却装置
WO2001064362A1 (fr) * 2000-03-01 2001-09-07 Nkk Corporation Dispositif et procede de refroidissement d'une bande d'acier laminee a chaud et procede de fabrication de cette bande d'acier laminee a chaud

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1508388A4 *

Also Published As

Publication number Publication date
JP3925789B2 (ja) 2007-06-06
DE60324272D1 (de) 2008-12-04
TW200307580A (en) 2003-12-16
KR20040062691A (ko) 2004-07-07
JP2003334605A (ja) 2003-11-25
EP1508388A4 (fr) 2005-08-17
CN1610584A (zh) 2005-04-27
EP1508388B1 (fr) 2008-10-22
TWI222903B (en) 2004-11-01
EP1508388A1 (fr) 2005-02-23
CN1290634C (zh) 2006-12-20
KR100598006B1 (ko) 2006-07-13

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