EP1935522A1 - Installation de refroidissement et procédé de redroidissement destiné à une plaque en acier - Google Patents

Installation de refroidissement et procédé de redroidissement destiné à une plaque en acier Download PDF

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Publication number
EP1935522A1
EP1935522A1 EP06783167A EP06783167A EP1935522A1 EP 1935522 A1 EP1935522 A1 EP 1935522A1 EP 06783167 A EP06783167 A EP 06783167A EP 06783167 A EP06783167 A EP 06783167A EP 1935522 A1 EP1935522 A1 EP 1935522A1
Authority
EP
European Patent Office
Prior art keywords
sheet
plate
steel
cooling
cooling water
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.)
Granted
Application number
EP06783167A
Other languages
German (de)
English (en)
Other versions
EP1935522A4 (fr
EP1935522B1 (fr
Inventor
Naoki Nakata
Takashi Kuroki
Akio Fujibayashi
Shogo Tomita
Masayuki Horie
Shunichi Nishida
Naoto Hirata
Michio Sato
Kyohei Ishida
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
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Filing date
Publication date
Application filed by JFE Steel Corp filed Critical JFE Steel Corp
Publication of EP1935522A1 publication Critical patent/EP1935522A1/fr
Publication of EP1935522A4 publication Critical patent/EP1935522A4/fr
Application granted granted Critical
Publication of EP1935522B1 publication Critical patent/EP1935522B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product

Definitions

  • the rodlike jets of cooling water 23a ejected from the first upper nozzles 22a oppose the rodlike jets of cooling water 23b ejected from the second upper nozzles 22b in the transferring direction of the steel plate or sheet 10. Therefore, the ejected rodlike jets of cooling water 23a and 23b dam the remaining cooling water 24 on the upper surface of the steel plate or sheet 10 that attempts to flow out of water cooling area. Consequently, even when the cooling water is supplied at a high water flow rate of 4 m 3 /m 2 min or more, a stable cooling area can be obtained, and uniform cooling can be performed.
  • the cooling water ejected from the upper nozzles 22a and 22b is not in a film shape obtained by using slit nozzles or the like, but is in a rod shape because the rodlike jet of cooling water can form a more stable flow and has a stronger force for damming the remaining cooling water.
  • a plurality of rows at least three rows of nozzles for jetting the cooling water be provided in the transferring direction and the direction opposite the transferring direction. More preferably, at least five rows are provided.
  • the upper limit of number of rows can be appropriately determined in accordance with the size of the steel plate or sheet to be cooled, the transferring speed, and the target temperature drop.
  • a steel plate or sheet which passes through the cooling area of the cooling equipment 20 before and/or during and/or after rolling, is rolled by the reversing rolling mill 12 while being cooled by the cooling equipment 20 so that a predetermined controlled rolling start temperature (e.g. 850°C or less) is achieved at a predetermined controlled rolling start thickness (e.g., 1.5 to 2 times the final thickness).
  • a predetermined controlled rolling start temperature e.g. 850°C or less
  • a predetermined controlled rolling start thickness e.g. 1.5 to 2 times the final thickness.
  • the steel plate or sheet is uniformly cooled during controlled rolling, and a high product quality can be obtained. Moreover, the rolling productivity is prevented from being reduced by, for example, waiting for cooling.
  • the jet directions of rodlike jets of cooling water 23a and 23b are set so that 0 to 35% of the velocity components in the jet directions of the rodlike jets of cooling water 23a and 23b in the first embodiment shown in Fig. 2 head outward in the steel-plate or sheet width direction.
  • Fig. 8 shows the jet direction of a rodlike jet of cooling water.
  • the angle (substantial inclination) formed between the jet line of the rodlike jet of cooling water and the steel plate or sheet is designated as ⁇
  • the inclination with respect to the transferring direction is designated as ⁇
  • the angle (outward angle) at which the cooling water heads outward in the steel-plate or sheet width direction is designated as ⁇ .
  • Lw/L width-direction velocity component ratio
  • draining can be performed with less water by increasing the outward angle ⁇
  • the range in which the nozzle density is high is increased near the center in the steel-plate or sheet width direction, as shown in Figs. 6 and 7 .
  • the outward angle ⁇ is determined in consideration of the ability of a pump that supplies water to the headers and the thickness of pipes so as to obtain a uniform flowrate distribution in the steel-plate or sheet width direction.
  • the shielding plates 26a and 26b can be respectively moved up and down by cylinders 27a and 27b.
  • the shielding plates 26a and 26b can be used only during product manufacturing, and can be raised to upper retracted positions in other cases.
  • one unit was provided in the first cooling equipment 14 in which the nozzle layout shown in Fig. 7 was adopted, the height of the leading ends of the nozzles, the nozzle inner diameter, the water flow rate, the jet angles ⁇ 1 and ⁇ 2, and the jet velocity were the same as those in the first invention example, and the outward angle ⁇ of the rodlike jets of cooling water was fixed at 20°.
  • Six units of the same type were provided in the second cooling equipment 16. Conveyance was performed in the conveyance pattern A and the conveyance pattern B.
  • the position where the rodlike jets of cooling water strike the steel plate or sheet were spaced at a pitch of 60 mm in the steel-plate or sheet width direction.
  • Table 2 shows the comparison results.
  • Table 2 Conveyance Pattern Cooling Water Supply Method Outward Angle Temperature Difference Equipment Damage Production Efficiency Yield Equipment Cost Remarks
  • the equipment was sometimes damaged when the steel plate or sheet was warped. Since the steel plate or sheet striking the equipment is defective as a product, the product yield was lower than in the first comparative example. Further, since much time was taken to repair the damaged equipment, the production efficiency also decreased. Since the cooling water films were supplied, deposits adhered to the nozzle openings and cooling water films were not formed. In this case, the cooling water could sometimes not be dammed within the jet area (within the cooling area). For this reason, by the influence of cooling water remaining on the steel plate or sheet, the temperature difference was 80°C in the conveyance pattern A (accelerated cooling after finish rolling), and 40°C in the conveyance pattern B (temperature adjustment cooling before controlled rolling). The product strength greatly varied.
  • the height of the nozzle leading ends was set high at 1.2 m. Therefore, the equipment was not damaged even when the steel plate or sheet was warped, the yield was not reduced by trouble, and the production efficiency was improved. Further, since rodlike jets of cooling water were ejected at high speed while opposing each other, the cooling water could be completely dammed within the cooling area, and the temperature difference could be limited to an extremely low value of 8 to 15°C.
  • a steel plate was rolled while being cooled by the cooling equipment 20 so that a predetermined controlled rolling start temperature (820°C) was obtained at a predetermined controlled rolling start thickness (34 mm). Subsequently, cooling by the cooling equipment 20 was stopped, and the steel plate was rolled to a final thickness of 18.5 mm.
  • Fig. 13 shows the results.
  • a white circle and a black circle respectively show rolling paths in both cases.
  • the time from extraction from the reheating furnace to completion of rolling was 205 seconds in the related art.
  • the time was reduced by 40 seconds to 165 seconds.
  • the product quality in the invention example was not inferior to that in the related art.
  • one cooling unit 20 of the same type of that shown in Fig. 2 was provided in the first cooling equipment 14, and six cooling units 20 of the same type were provided in the second cooling equipment 16.
  • the height of the leading ends of the upper nozzles 22a and 22b from the table rollers was 1.2 m
  • the upper nozzles 22a and 22b were arranged in the layout shown in Fig. 4A
  • the nozzle inner diameter was 6 mm
  • the water flow rate was 6 m 3 /m 2 min.
  • a steel plate or sheet was cooled by the cooling equipment shown in Fig. 6 or 7 .
  • the inclination ⁇ of rodlike jets of cooling water with respect to the transferring direction was 45°
  • the jet velocity was 8 m/s.
  • the cooling equipment shown in Fig. 6 was used, the outward angle ⁇ of rodlike jets of cooling water at the center in the steel-plate or sheet width direction was 0°, and the outward angle ⁇ of outermost rodlike jets of cooling water was 25°.
  • the positions where the rodlike jets of cooling water strike the steel-plate or sheet were spaced at a pitch of 60 mm in the steel-plate or sheet width direction.
  • the jets of cooling water ejected from the upper nozzles 22a and 22b onto the upper surface of the steel-plate or sheet 10 merged and promptly dropped from the widthwise edges of the steel plate or sheet 10, as shown by arrows A in Figs. 6 and 7 .
  • the remaining cooling water 24 could be dammed and draining could be performed with less water than when there is no outward angle ⁇ .
  • the cooling unit 40 including the shielding curtains 28a and 28b shown in Fig. 11 was used.
  • the distance in the transferring direction ( ⁇ in Fig. 11 ) from the lowermost ends of the shielding curtains 28a and 28b raised by ejection of the rodlike jets of cooling water to the positions where the outermost rows of rodlike jets of cooling water strike the steel plate 10 was 300 mm.
  • the steel plate or sheet is subjected to controlled rolling, it is uniformly cooled, and a high product quality can be obtained. Moreover, the rolling productivity can be prevented from being reduced by waiting for cooling.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
EP06783167.7A 2005-08-30 2006-08-29 Laminoir reversible avec une installation de refroidissement et procede de refroidissement correspondant pour une plaque ou une tole en acier Active EP1935522B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2005249060 2005-08-30
JP2005249061 2005-08-30
JP2005249055 2005-08-30
JP2006001568 2006-01-06
PCT/JP2006/317395 WO2007026906A1 (fr) 2005-08-30 2006-08-29 Installation de refroidissement et procédé de redroidissement destiné à une plaque en acier

Publications (3)

Publication Number Publication Date
EP1935522A1 true EP1935522A1 (fr) 2008-06-25
EP1935522A4 EP1935522A4 (fr) 2011-05-11
EP1935522B1 EP1935522B1 (fr) 2015-11-18

Family

ID=37808990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06783167.7A Active EP1935522B1 (fr) 2005-08-30 2006-08-29 Laminoir reversible avec une installation de refroidissement et procede de refroidissement correspondant pour une plaque ou une tole en acier

Country Status (4)

Country Link
EP (1) EP1935522B1 (fr)
KR (1) KR100973691B1 (fr)
CN (1) CN101253009B (fr)
WO (1) WO2007026906A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8404062B2 (en) 2007-02-26 2013-03-26 Jfe Steel Corporation Device and method for cooling hot strip
US8591675B2 (en) * 2008-03-14 2013-11-26 Arcelormittal France Method and device for blowing gas on a running strip
TWI625173B (zh) * 2016-08-09 2018-06-01 東芝三菱電機產業系統股份有限公司 壓延機的出側溫度控制系統
TWI628011B (zh) * 2016-10-19 2018-07-01 日商新日鐵住金股份有限公司 熱延鋼板之冷卻方法及冷卻裝置
EP3409390A4 (fr) * 2016-01-27 2019-01-23 JFE Steel Corporation Ligne d'équipement de production pour bandes d'acier laminées à chaud et procédé de production pour bande d'acier laminée à chaud
EP3409389A4 (fr) * 2016-01-26 2019-01-23 JFE Steel Corporation Ligne d'appareillages de production pour bandes d'acier laminées à chaud et procédé de production pour bande d'acier laminée à chaud
CN111744959A (zh) * 2020-07-08 2020-10-09 马鞍山钢铁股份有限公司 一种冷轧带钢卷曲溢出边自动控制装置及方法

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4960732B2 (ja) * 2007-03-14 2012-06-27 Ｊｆｅスチール株式会社 熱延鋼帯冷却設備
CN101811144B (zh) * 2009-02-24 2012-05-30 宝山钢铁股份有限公司 一种层流水冷却装置及控制方法
US8414716B2 (en) * 2009-05-13 2013-04-09 Nippon Steel & Sumitomo Metal Corporation Cooling method of hot-rolled steel strip
JP2011143461A (ja) * 2010-01-15 2011-07-28 Jfe Steel Corp 厚鋼板の製造方法
JP2011143459A (ja) * 2010-01-15 2011-07-28 Jfe Steel Corp 厚鋼板の製造方法
JP2011143460A (ja) * 2010-01-15 2011-07-28 Jfe Steel Corp 厚鋼板の製造方法
JP2011143462A (ja) * 2010-01-15 2011-07-28 Jfe Steel Corp 厚鋼板の製造方法
CN103498023B (zh) * 2013-09-03 2015-12-23 上海交通大学 防止矩形合金钢件水淬边、角开裂的方法
DE102016223721A1 (de) * 2016-03-18 2017-09-21 Sms Group Gmbh Vorrichtung und Verfahren zum Erzeugen eines Werkstücks eines vorbestimmten Typs
EP3434383A1 (fr) 2017-07-24 2019-01-30 Primetals Technologies Austria GmbH Dispositif de refroidissement de cage permettant le refroidissement d'un feuillard en acier dans une cage de laminoir
JP7103511B2 (ja) * 2019-09-30 2022-07-20 Ｊｆｅスチール株式会社 金属帯急冷装置及び金属帯急冷方法並びに金属帯製品の製造方法
KR102215510B1 (ko) * 2020-05-29 2021-02-15 주식회사 디케이씨 후판 냉각 장치
CN112170493B (zh) * 2020-10-12 2024-06-14 山西陆业达冶金机械有限公司 一种轧制钢板卷取侧导梁喷淋装置
CN114472548B (zh) * 2020-10-23 2024-06-04 宝山钢铁股份有限公司 一种减小超长板轧制过程中头尾温差的系统及方法
CN113000608B (zh) * 2021-02-05 2023-04-11 首钢集团有限公司 一种轧机工作辊的冷却水横向流量分布获取方法及装置
CN114289531B (zh) * 2021-12-31 2024-05-10 浙江精瑞工模具有限公司 一种单程双面水除鳞系统

Citations (5)

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JPH08150410A (ja) * 1994-11-28 1996-06-11 Hitachi Ltd 熱延鋼板冷却設備
JPH10291021A (ja) * 1997-04-17 1998-11-04 Nkk Corp 高温鋼板の冷却方法及び高温鋼板の冷却装置
JP2001286925A (ja) * 2000-04-10 2001-10-16 Sumitomo Metal Ind Ltd 鋼板の水冷装置とその水冷方法
JP2002066605A (ja) * 2000-08-30 2002-03-05 Hitachi Ltd 熱間圧延方法および設備
EP1527829A1 (fr) * 2002-08-08 2005-05-04 JFE Steel Corporation Dispositif de refroidissement, procede de fabrication et chaine de fabrication de bande d'acier laminee a chaud

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CN1049303A (zh) * 1989-09-15 1991-02-20 沃洛格达综合技术学院 冷却热轧板材的方法
JP4678112B2 (ja) * 2001-09-21 2011-04-27 Ｊｆｅスチール株式会社 鋼板の冷却方法および装置
JP2003320402A (ja) * 2002-04-30 2003-11-11 Jfe Steel Kk 熱延鋼帯の製造方法および製造装置
CN1304133C (zh) * 2002-08-08 2007-03-14 杰富意钢铁株式会社 热轧钢带的冷却装置、热轧钢带的制造方法以及热轧钢带的生产线
JP4254364B2 (ja) * 2003-06-13 2009-04-15 Ｊｆｅスチール株式会社 厚鋼板の制御圧延装置及びそれを用いた制御圧延方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08150410A (ja) * 1994-11-28 1996-06-11 Hitachi Ltd 熱延鋼板冷却設備
JPH10291021A (ja) * 1997-04-17 1998-11-04 Nkk Corp 高温鋼板の冷却方法及び高温鋼板の冷却装置
JP2001286925A (ja) * 2000-04-10 2001-10-16 Sumitomo Metal Ind Ltd 鋼板の水冷装置とその水冷方法
JP2002066605A (ja) * 2000-08-30 2002-03-05 Hitachi Ltd 熱間圧延方法および設備
EP1527829A1 (fr) * 2002-08-08 2005-05-04 JFE Steel Corporation Dispositif de refroidissement, procede de fabrication et chaine de fabrication de bande d'acier laminee a chaud

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2007026906A1 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8404062B2 (en) 2007-02-26 2013-03-26 Jfe Steel Corporation Device and method for cooling hot strip
US8591675B2 (en) * 2008-03-14 2013-11-26 Arcelormittal France Method and device for blowing gas on a running strip
US9222700B2 (en) 2008-03-14 2015-12-29 Arcelormittal France Method and device for blowing gas on a running strip
EP3409389A4 (fr) * 2016-01-26 2019-01-23 JFE Steel Corporation Ligne d'appareillages de production pour bandes d'acier laminées à chaud et procédé de production pour bande d'acier laminée à chaud
US11007556B2 (en) 2016-01-26 2021-05-18 Jfe Steel Corporation Production equipment line for hot-rolled steel strip and production method for hot-rolled steel strip
EP3409390A4 (fr) * 2016-01-27 2019-01-23 JFE Steel Corporation Ligne d'équipement de production pour bandes d'acier laminées à chaud et procédé de production pour bande d'acier laminée à chaud
US11020780B2 (en) 2016-01-27 2021-06-01 Jfe Steel Corporation Production equipment line for hot-rolled steel strip and production method for hot-rolled steel strip
TWI625173B (zh) * 2016-08-09 2018-06-01 東芝三菱電機產業系統股份有限公司 壓延機的出側溫度控制系統
TWI628011B (zh) * 2016-10-19 2018-07-01 日商新日鐵住金股份有限公司 熱延鋼板之冷卻方法及冷卻裝置
US10350659B2 (en) 2016-10-19 2019-07-16 Nippon Steel & Sumitomo Metal Corporation Cooling method and cooling apparatus for hot-rolled steel sheet
CN111744959A (zh) * 2020-07-08 2020-10-09 马鞍山钢铁股份有限公司 一种冷轧带钢卷曲溢出边自动控制装置及方法

Also Published As

Publication number Publication date
CN101253009A (zh) 2008-08-27
KR100973691B1 (ko) 2010-08-03
EP1935522A4 (fr) 2011-05-11
KR20080034965A (ko) 2008-04-22
WO2007026906A1 (fr) 2007-03-08
EP1935522B1 (fr) 2015-11-18
CN101253009B (zh) 2010-12-22

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