EP3366380A1 - Endloswalzvorrichtung und verfahren - Google Patents

Endloswalzvorrichtung und verfahren Download PDF

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Publication number
EP3366380A1
EP3366380A1 EP16857636.1A EP16857636A EP3366380A1 EP 3366380 A1 EP3366380 A1 EP 3366380A1 EP 16857636 A EP16857636 A EP 16857636A EP 3366380 A1 EP3366380 A1 EP 3366380A1
Authority
EP
European Patent Office
Prior art keywords
cooling
slab
thickness
water
rolling
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.)
Withdrawn
Application number
EP16857636.1A
Other languages
English (en)
French (fr)
Other versions
EP3366380A4 (de
Inventor
Jea-Sook CHUNG
Suk-Cheol Song
Kyo-Sun PARK
Yong-Ki Kim
Yong-Seok Cho
Young-Sup Shim
Young-Ju Ko
Kyeong-Mi Park
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.)
Posco Holdings Inc
Original Assignee
Posco Co Ltd
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 Posco Co Ltd filed Critical Posco Co Ltd
Publication of EP3366380A1 publication Critical patent/EP3366380A1/de
Publication of EP3366380A4 publication Critical patent/EP3366380A4/de
Withdrawn legal-status Critical Current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
    • B21B1/46—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
    • 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
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B21B37/76—Cooling control on the run-out table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
    • 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
    • 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
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
    • 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
    • B21B1/463—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 continuous process, i.e. the cast not being cut before rolling
    • 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
    • C21D1/84—Controlled slow cooling
    • 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
    • C21D11/00—Process control or regulation for heat treatments
    • C21D11/005—Process control or regulation for heat treatments for cooling

Definitions

  • the present disclosure relates to an endless rolling apparatus and method for manufacturing advanced high strength steel (AHSS).
  • AHSS advanced high strength steel
  • a cooling speed and an amount of cooling water are set to be different according to a type of produced steel grade (for example, dual-phase (DP) steel, transformation induced plasticity (TRIP) steel, ferritic-bainitic (FB) steel, and the like).
  • DP dual-phase
  • TRIP transformation induced plasticity
  • FB ferritic-bainitic
  • a runout table (ROT) passing speed may be different for each final thickness.
  • ROT runout table
  • AHSS advanced high strength steel
  • a speed at which the steel passes through an endless rolling apparatus is controlled to be slow.
  • an ROT cooling method also differs from an endless rolling process according to the related art.
  • the water cooling start time required to manufacture AHSS may not be known exactly, so it may be difficult to determine a cooling position.
  • An aspect of the present disclosure may provide an endless rolling apparatus and method having improved cooling conditions for production of advanced high strength steel (AHSS).
  • AHSS advanced high strength steel
  • an endless rolling apparatus includes a continuous casting device casting a slab and a cooling bed having at least one rolling mill and at least one water-cooling device, continuously provided with the continuous casting device.
  • an initial position (S), at which the water-cooling device is provided to manufacture advanced high strength steel through at least one water-cooling, is defined by Formula 1,
  • S H ⁇ V h ⁇ t HERE ,0 ⁇ t ⁇ 10 sec
  • H is the thickness (mm) of the slab
  • V is the casting speed (m/sec) of the slab
  • h is product thickness (mm)
  • t target arrival time (sec) until entry into the cooling bed.
  • an endless rolling method includes: a casting operation of casting a slab using a continuous casting device; a casting speed and thickness measuring operation of measuring a casting speed of the slab produced in the casting operation and a thickness (H) of the slab; a rolling operation of rolling the slab, continuously connected to the continuous casting device, to a target thickness; a product thickness measuring operation of measuring a thickness of a product rolled in the rolling operation; a target arrival time setting operation of setting the target arrival time required for the product to enter a water cooling section of a cooling bed after completion of the rolling operation; and a water cooling start position calculating operation of setting an initial water cooling start position (S) to manufacture advanced high strength steel through at least one water-cooling in the cooling bed using a value obtained in each operation.
  • S initial water cooling start position
  • a temperature of the product may be controlled to 750°C to 880°C.
  • an initial water cooling start position allowing AHSS to be manufactured using at least one water cooling process is determined, so advanced high strength steel (AHSS) may be manufactured while significantly reducing cooling after finish rolling.
  • AHSS advanced high strength steel
  • FIG. 1 is a view schematically illustrating an endless rolling apparatus.
  • an endless rolling apparatus 100 of an exemplary embodiment may perform a casting process of continuously casting a slab while solidifying molten steel in a liquid phase to a solid phase without a defect, and a rolling process of rolling the slab, continuously cast as described above.
  • a slab product is produced using a continuous casting device 110.
  • the slab is manufactured as a product having a target thickness while passing through at least one rolling mill 120, continuously connected to the slab. Thereafter, the slab is manufactured as a final product while passing through a cooling bed 140 and being wound on a winding apparatus 150.
  • the rolling mill 120 may include a rough rolling mill 122, an intermediate rolling mill 124, and a finish rolling mill 126.
  • a heating device 130 for heating the slab may be provided between each of the mills included in the rolling mill 120.
  • the cooling bed 140 is divided into an air cooling section in which cooling is performed with air, and a water cooling section in which water cooling is performed with cooling water.
  • the water cooling section may include a water-cooling device spraying cooling water for high speed cooling.
  • the water-cooling device may be a water cooling device 142, known as a high density cooling or laminar flow cooling device and installed in a cooling bed.
  • FIG. 2 a graph illustrating a cooling pattern for the production of general steel, after a product, passing through the finish rolling mill 126, is air-cooled before the entry into the cooling bed 140, the product is cooled by water cooling in a process in which the product is supplied to the cooling bed 140 and passes through the water cooling device 142. Thereafter, the product is controlled to a target coiling temperature through a final air cooling process.
  • ferrite and pearlite fractions may be controlled through operations of air cooling-water cooling-air cooling.
  • advanced high strength steel is able to be manufactured using a batch rolling method.
  • a product, passing through the finish rolling mill 126 is cooled through primary air cooling before the entry into the cooling bed 140. Thereafter, the product is cooled through primary water cooling while the product is supplied to the cooling bed 140 and passes through the water cooling device 142.
  • the product, passing through the water cooling device 142 is cooled through secondary air cooling. Thereafter, the product passes through the water cooling device 142 again, and may be cooled through secondary water cooling.
  • air cooling may be performed again on the product, on which secondary air cooling and secondary water cooling have been performed.
  • cooling may be performed according to a target coiling temperature.
  • ferrite and bainite and martensite fractions are controlled for each steel grade, so required steel grade properties (for example, DP steel, TRIP steel, FB steel, and the like) may be obtained.
  • an initial temperature (FDT) of 820°C or more may be secured.
  • the advanced high strength steel (AHSS) manufactured in the endless rolling apparatus 100 may be manufactured by a cooling pattern as illustrated in FIG. 4 , a graph illustrating a cooling pattern for production of AHSS in endless rolling.
  • an initial temperature (FDT), after the steel passes through the finish rolling mill 126, may be controlled to 750°C to 880°C.
  • a product, passing through the finish rolling mill 126 is cooled through primary air cooling before entry into the cooling bed 140. Thereafter, the product is cooled through primary water cooling while the product is supplied to the cooling bed 140 and passes through the water cooling device 142. In addition, the product, passing through the water cooling device 142, is cooled through secondary air cooling.
  • cooling may be performed according to a target coiling temperature. Depending on a temperature at which cooling is performed, ferrite, bainite and martensite fractions are controlled for each steel grade, so required steel grade properties (for example, DP steel, TRIP steel, FB steel, and the like) may be obtained.
  • continuous casting-rolling processes are directly connected, and a product is continuously supplied.
  • a speed of the product is controlled to be relatively slow, so cooling may only be sufficient when at least one high speed cooling and a desired target coiling temperature (CT) of steel may be secured.
  • CT target coiling temperature
  • AHSS advanced high strength steel
  • the water cooling start position (S) may be calculated using uniform mass flow throughout an entire process of an endless rolling process.
  • mass flow is uniform throughout an entire process, and the mass flow is calculated using a material cross-section and speed.
  • a position in which the water cooling device 142 is installed that is, a water cooling start position (S) is calculated.
  • an initial water cooling start position (S) is defined by Formula 1.
  • S H ⁇ V h ⁇ t HERE ,0 ⁇ t ⁇ 10 sec
  • H is a thickness (mm) of a slab
  • V is the casting speed (m/sec) of the slab
  • h is product thickness (mm)
  • t is the target arrival time (s) until entry into the cooling bed 140.
  • the target arrival time until entry into the cooling bed 140 is greater than 0 seconds, and is limited to being within 10 seconds (sec) to improve productivity.
  • a thickness of a product may be obtained through measurement after finish rolling.
  • the thickness of the product is 2.0 mm
  • the target arrival time until entry into the cooling bed 140 is set to be 4 seconds (sec).
  • a casting speed 6.5 m/min
  • a conversion factor 1/60 (min/sec), in order to be converted into movement distance per second.
  • an initial water cooling start position S
  • an endless rolling method of an exemplary embodiment may include a casting operation of casting a slab using a continuous casting device 110.
  • a casting speed of a slab and a thickness (H) of the slab are required to be measured.
  • a casting speed and thickness measuring operation of measuring a casting speed of the slab, produced in the casting operation, and the thickness (H) of the slab may be performed.
  • a rolling operation of rolling the slab, casted in the casting operation, at a target thickness may be performed.
  • a temperature (FDT) of the product may be controlled to 750°C to 880°C when the rolling operation is completely.
  • a product thickness measuring operation of measuring a thickness of the product, rolled in the rolling operation may be performed.
  • the target arrival time required for a product to reach a position of the cooling bed 140, in which the product enters an initial water cooling device 142, of at least one water cooling device 142 after the rolling operation is completed, that is, an initial water cooling start position, may be set.
  • a cooling start position may be calculated.
  • the endless rolling method may be used in the apparatus according to the related art, and the endless rolling method is applied to the apparatus according to the related art using Formula 2 to determine whether the apparatus according to the related art is operated as the endless rolling apparatus 100 of an exemplary embodiment.
  • the apparatus according to the related art may be provided with a plurality of water cooling devices 142 in the cooling bed 140 so as to allow cooling-air cooling operations to be performed several times.
  • L 1 is a distance (m) from the finish rolling mill 126 to a first ROT cooling device
  • L 2 is a distance (m) from the finish rolling mill 126 to a final ROT cooling device.
  • H is a thickness (mm) of a slab
  • V is a casting speed (m/s) of the slab
  • h is a thickness (mm) of a product
  • t is the target arrival time (sec) until the entry into the cooling bed 140.
  • ⁇ is a constant of a length of a cooling device required to secure a target coiling temperature (CT).
  • a position of the cooling bed 140, in which an initial water cooling device 142, of at least one water cooling device 142, is installed that is, an initial water cooling start position (S), is calculated using Formula 1 by unit conversion, so the initial water cooling start position from the finish rolling mill 126 is 19.5 m.
  • a position in which the water cooling device 142 is installed is greater than a distance L 1 from the finish rolling mill 126 to a first ROT cooling device, 10m.
  • a position of the cooling bed 140, in which initial water cooling, of at least one water-cooling, starts that is, an initial water cooling start position (S), 19.5 m is smaller than 41.6 m, required when a distance L 2 from the finish rolling mill 126 to a final ROT cooling device is 48 m, and a constant of a length of a cooling device required to secure a target coiling temperature (CT), ⁇ is 7.4 m.
  • the endless rolling method of an exemplary embodiment can be applied through the apparatus according to the related art, and advanced high strength steel (AHSS) may be produced by applying the endless rolling method to the apparatus according to the related art.
  • AHSS advanced high strength steel

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)
  • Continuous Casting (AREA)
EP16857636.1A 2015-10-21 2016-06-27 Endloswalzvorrichtung und verfahren Withdrawn EP3366380A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020150146898A KR101755236B1 (ko) 2015-10-21 2015-10-21 연연속 압연 장치 및 방법
PCT/KR2016/006854 WO2017069378A1 (ko) 2015-10-21 2016-06-27 연연속 압연 장치 및 방법

Publications (2)

Publication Number Publication Date
EP3366380A1 true EP3366380A1 (de) 2018-08-29
EP3366380A4 EP3366380A4 (de) 2018-10-17

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EP16857636.1A Withdrawn EP3366380A4 (de) 2015-10-21 2016-06-27 Endloswalzvorrichtung und verfahren

Country Status (6)

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US (1) US20180297092A1 (de)
EP (1) EP3366380A4 (de)
JP (1) JP2018530436A (de)
KR (1) KR101755236B1 (de)
CN (1) CN108136458B (de)
WO (1) WO2017069378A1 (de)

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Publication number Priority date Publication date Assignee Title
EP3532217B1 (de) * 2016-10-27 2021-05-05 Novelis, Inc. Verfahren zum giessen und walzen von aluminiumlegierungen und zugehörigem zwischenprodukt
JP7082974B2 (ja) 2016-10-27 2022-06-09 ノベリス・インコーポレイテッド 高強度６ｘｘｘシリーズアルミニウム合金およびその作製方法
CA3041580A1 (en) 2016-10-27 2018-05-03 Novelis Inc. High strength 7xxx series aluminum alloys and methods of making the same
CN115041655A (zh) * 2022-07-04 2022-09-13 重庆钢铁股份有限公司 一种防止高温下线铸坯弯曲的方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3637893C2 (de) * 1986-11-06 1996-02-08 Schloemann Siemag Ag Verfahren und Anlage zur Herstellung von warmgewalztem Stahlband und Bandgießanlage
JPH0777643B2 (ja) * 1987-01-16 1995-08-23 住友金属工業株式会社 熱間連続仕上圧延設備
EP0760397B1 (de) * 1995-04-14 2002-08-28 Nippon Steel Corporation Vorrichtung zur herstellung rostfreier stahlbänder
ES2179940T3 (es) * 1995-04-14 2003-02-01 Nippon Steel Corp Aparato para fabricar bandas de acero inoxidable.
JP2002096108A (ja) * 2000-09-18 2002-04-02 Toshiba Corp 圧延制御方法および圧延制御装置
JP3614123B2 (ja) * 2001-09-17 2005-01-26 Ｊｆｅスチール株式会社 熱延鋼板の製造方法
CN1757454A (zh) * 2005-09-01 2006-04-12 赵宗波 中板铸轧生产工艺
KR101249128B1 (ko) * 2010-12-28 2013-03-29 주식회사 포스코 스테인리스강의 연연속 압연장치와 그 방법
KR101536460B1 (ko) * 2013-12-23 2015-07-13 주식회사 포스코 연연속 압연 공정에서의 바 두께 제어장치 및 방법
JP7077643B2 (ja) * 2018-02-06 2022-05-31 凸版印刷株式会社 口栓、および口栓を有する包装容器

Also Published As

Publication number Publication date
WO2017069378A1 (ko) 2017-04-27
WO2017069378A8 (ko) 2017-07-06
KR20170046871A (ko) 2017-05-04
US20180297092A1 (en) 2018-10-18
EP3366380A4 (de) 2018-10-17
JP2018530436A (ja) 2018-10-18
CN108136458A (zh) 2018-06-08
KR101755236B1 (ko) 2017-07-10
CN108136458B (zh) 2020-05-15

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