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EP1325163B1 - Dual-purpose installation for continuous annealing and hot dip plating - Google Patents

Dual-purpose installation for continuous annealing and hot dip plating Download PDF

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Publication number
EP1325163B1
EP1325163B1 EP01965631A EP01965631A EP1325163B1 EP 1325163 B1 EP1325163 B1 EP 1325163B1 EP 01965631 A EP01965631 A EP 01965631A EP 01965631 A EP01965631 A EP 01965631A EP 1325163 B1 EP1325163 B1 EP 1325163B1
Authority
EP
European Patent Office
Prior art keywords
facility
continuous annealing
coating
steel sheet
hot dip
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
Application number
EP01965631A
Other languages
German (de)
French (fr)
Other versions
EP1325163A4 (en
EP1325163A1 (en
Inventor
Masanori NIPPON STEEL CORPORATION HOSHINO
Kouichi NIPPON STEEL CORPORATION TERAHARA
Motofumi NIPPON STEEL CORPORATION TAKEMURA
Nobuyoshi c/o NIPPON STEEL CORPORATION OKADA
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.)
Nippon Steel Corp
Original Assignee
Nippon 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of EP1325163A1 publication Critical patent/EP1325163A1/en
Publication of EP1325163A4 publication Critical patent/EP1325163A4/en
Application granted granted Critical
Publication of EP1325163B1 publication Critical patent/EP1325163B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
    • 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
    • C21D9/562—Details
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/40—Plates; Strips
    • 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

Definitions

  • the present invention relates to a dual-purpose installation for continuous annealing and hot dip plating to produce a continuously annealed steel sheet as well as a hot dip plated steel sheet by switching process routes in a single installation.
  • JP-A-55-6469 discloses a dual-purpose installation used for a hot dip plating line and a continuous annealing line, wherein a steel sheet coming out from a continuous annealing furnace is cooled in the normal atmosphere without being dipped into a plating pot when producing a continuously annealed steel sheet.
  • a steel sheet just coming out from a continuous annealing furnace has a high temperature, there is a problem in that the surfaces of the steel sheet will become oxidized if no countermeasures are taken.
  • An idea has been proposed of installing a pickling apparatus for removing the oxide films on the surfaces. However, this requires additional equipment investment, the necessity of newly installing a waste liquor treatment facility and increased operational loads.
  • JP-A-2000-204417 discloses an apparatus to sufficiently lower the temperature of a steel sheet at the exit from a continuous annealing furnace so as to prevent the steel sheet from oxidizing when it comes out from the continuous annealing furnace and is exposed to the outside atmosphere.
  • cooling a steel sheet to a temperature where it does not become oxidized when exposed to the normal atmosphere requires a larger cooling apparatus in the continuous annealing furnace and resultant increased equipment investment.
  • EP-A-0 072 874 and JP-A-58-71366 disclose a dual-purpose production plant for cold rolled steel sheets and hot-dip galvanized steel sheets comprising, successively disposed in series, a heating zone 5, a soaking zone 6, a primary cooling zone 7, an overaging zone 8 equipped with a controlled cooling facility, a molten galvanizing zone 9, an intermediate cooling means 10, a secondary cooling zone 11, a temper rolling means 14, and a chemical treatment means 16, said overaging zone 8 and said secondary cooling zone 11 being equipped with a bypass means 22 for directly connecting the two zones with each other.
  • the present invention proposes measures to solve the above problems and make a dual-purpose installation for continuous annealing and hot dip plating or hot dip galvanizing to produce a steel sheet without incurring a large increase in equipment costs.
  • Fig. 1 is a schematic illustration of the annealing furnace portion of a dual-purpose installation for continuous annealing and hot dip plating or hot dip galvanizing to which the present invention is applied.
  • a steel sheet 1 is annealed in a continuous annealing furnace 2.
  • the steel sheet 1 is fed to a coating pot 3 and plated after going through the continuous annealing furnace 2 as shown by dotted lines.
  • the coating weight is controlled by a coating facility 4
  • the steel sheet is subjected to alloying treatment in an alloying furnace 5, as required, cooled by steel sheet cooling units 6, and then cooled further to near room temperature in a water quenching facility 7.
  • the above sequence of process steps is exactly the same as the normal process sequence for producing a hot dip plated or hot dip galvanized product.
  • the steel sheet 1 When producing a continuously annealed steel sheet, the steel sheet 1 has to be cooled to near room temperature by the water quenching facility 7, without going through the coating pot 3, the coating facility 4, the alloying furnace 5 and the cooling units 6. However, if the steel sheet 1 is exposed to the outside atmosphere after going through the continuous annealing furnace 2, the surfaces of the steel sheet become oxidized. To avoid oxidization, a bypass facility 8 is installed in the present invention so that the steel sheet can travel from the continuous annealing furnace 2 directly to the water quenching facility 7 without being exposed to the outside atmosphere.
  • the steel sheet 1 can be transferred to the water quenching facility 7 and cooled without being oxidized. Further, by installing the coating pot 3, the coating facility 4 and a crane 9 beneath the bypass facility 8, it becomes possible to transport and repair the coating pot, the coating facility or the equipment in the coating pot during the production of a continuously annealed product, thus enhancing production efficiency.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating With Molten Metal (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Description

  • The present invention relates to a dual-purpose installation for continuous annealing and hot dip plating to produce a continuously annealed steel sheet as well as a hot dip plated steel sheet by switching process routes in a single installation.
  • While a continuously annealed steel sheet and a hot dip plated steel sheet, especially a hot dip galvanized steel sheet, have so far been produced, in general practice, using different installations designed for the respective purposes, a dual-purpose installation for continuous annealing and hot dip plating or hot dip galvanizing to produce a continuously annealed steel sheet as well as a hot dip plated steel sheet in a single installation is proposed in JP-A-65-6469 or JP-A-2000-2044417 .
  • JP-A-55-6469 discloses a dual-purpose installation used for a hot dip plating line and a continuous annealing line, wherein a steel sheet coming out from a continuous annealing furnace is cooled in the normal atmosphere without being dipped into a plating pot when producing a continuously annealed steel sheet. However, since a steel sheet just coming out from a continuous annealing furnace has a high temperature, there is a problem in that the surfaces of the steel sheet will become oxidized if no countermeasures are taken. An idea has been proposed of installing a pickling apparatus for removing the oxide films on the surfaces. However, this requires additional equipment investment, the necessity of newly installing a waste liquor treatment facility and increased operational loads.
  • JP-A-2000-204417 discloses an apparatus to sufficiently lower the temperature of a steel sheet at the exit from a continuous annealing furnace so as to prevent the steel sheet from oxidizing when it comes out from the continuous annealing furnace and is exposed to the outside atmosphere. However, cooling a steel sheet to a temperature where it does not become oxidized when exposed to the normal atmosphere requires a larger cooling apparatus in the continuous annealing furnace and resultant increased equipment investment.
  • EP-A-0 072 874 and JP-A-58-71366 disclose a dual-purpose production plant for cold rolled steel sheets and hot-dip galvanized steel sheets comprising, successively disposed in series, a heating zone 5, a soaking zone 6, a primary cooling zone 7, an overaging zone 8 equipped with a controlled cooling facility, a molten galvanizing zone 9, an intermediate cooling means 10, a secondary cooling zone 11, a temper rolling means 14, and a chemical treatment means 16, said overaging zone 8 and said secondary cooling zone 11 being equipped with a bypass means 22 for directly connecting the two zones with each other.
  • The present invention proposes measures to solve the above problems and make a dual-purpose installation for continuous annealing and hot dip plating or hot dip galvanizing to produce a steel sheet without incurring a large increase in equipment costs.
  • The problems above can be solved by the features specified in the claims.
  • The invention is described in detail in conjunction with a drawing, in which:
    • Fig. 1 is a schematic illustration showing a dual-purpose installation for continuous annealing and hot dip plating to which the present invention is applied.
  • The present invention is explained in detail hereafter based on an example.
  • Fig. 1 is a schematic illustration of the annealing furnace portion of a dual-purpose installation for continuous annealing and hot dip plating or hot dip galvanizing to which the present invention is applied. A steel sheet 1 is annealed in a continuous annealing furnace 2. When producing a plated or galvanized product, the steel sheet 1 is fed to a coating pot 3 and plated after going through the continuous annealing furnace 2 as shown by dotted lines. Then, after the coating weight is controlled by a coating facility 4, the steel sheet is subjected to alloying treatment in an alloying furnace 5, as required, cooled by steel sheet cooling units 6, and then cooled further to near room temperature in a water quenching facility 7. The above sequence of process steps is exactly the same as the normal process sequence for producing a hot dip plated or hot dip galvanized product.
  • When producing a continuously annealed steel sheet, the steel sheet 1 has to be cooled to near room temperature by the water quenching facility 7, without going through the coating pot 3, the coating facility 4, the alloying furnace 5 and the cooling units 6. However, if the steel sheet 1 is exposed to the outside atmosphere after going through the continuous annealing furnace 2, the surfaces of the steel sheet become oxidized. To avoid oxidization, a bypass facility 8 is installed in the present invention so that the steel sheet can travel from the continuous annealing furnace 2 directly to the water quenching facility 7 without being exposed to the outside atmosphere.
  • Since the interior of the bypass facility 8 is kept filled with a non-oxidizing atmosphere having, for example, a composition of 5 to 10% of H2 and 95 to 90% of N2, which is the same atmosphere as that in the continuous annealing furnace, the steel sheet 1 can be transferred to the water quenching facility 7 and cooled without being oxidized. Further, by installing the coating pot 3, the coating facility 4 and a crane 9 beneath the bypass facility 8, it becomes possible to transport and repair the coating pot, the coating facility or the equipment in the coating pot during the production of a continuously annealed product, thus enhancing production efficiency.
  • As explained above, by applying the present invention to a dual-purpose installation for continuous annealing, hot dip plating and hot dip galvanizing, it becomes possible to eliminate a pickling facility for removing oxide films on the surfaces of a steel sheet after annealing. Further, it is also possible to transport and repair a coating pot, a coating facility and the equipment in the coating pot using a crane during the production of a continuously annealed product, and thus enhance production efficiency.

Claims (2)

  1. A dual-purpose installation for continuous annealing and hot dip plating wherein at least a continuous annealing furnace (2), a coating pot (3), a coating facility (4) and a water quenching facility (7) are arranged in the form of a processing line along the travelling direction of a steel sheet, and wherein a bypass facility (8) is installed for transferring the steel sheet (1) from the continuous annealing furnace (2) to the water quenching facility (7) without being exposed to the outside atmosphere, the coating pot (3) and the coating facility (4) being installed beneath the bypass facility,
    characterized by
    the bypass facility (8) enabling the steel sheet (1) to be led from the continuous annealing furnace (2) directly to the water quenching facility (7) and the interior of the bypass facility (8) being kept filled with a non-oxidizing atmosphere, and
    means (9) for transporting the coating facility (4) and/or the equipment in the coating pot (3) during simultaneously producing annealed product by the continuous annealing furnace of the dual-purpose installation, thereby enabling repair of the coating facility (4) and/or the equipment in the coating pot (3) during simultaneously producing of the continuously annealed product,
    wherein said means (9) for transporting the coating facility (4) and/or the equipment in the coating pot (3) is installed beneath the bypass facility (8).
  2. A dual-purpose installation for continuous annealing and hot dip plating according to claim 1, wherein said means (9) for transporting includes a crane installed beneath the bypass facility (8).
EP01965631A 2000-09-13 2001-09-13 Dual-purpose installation for continuous annealing and hot dip plating Expired - Lifetime EP1325163B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2000278566 2000-09-13
JP2000278566A JP2002088414A (en) 2000-09-13 2000-09-13 Equipment for combined use of continuous annealing and hot-dip plating
PCT/JP2001/007969 WO2002022894A1 (en) 2000-09-13 2001-09-13 Dual-purpose installation for continuous annealing and hot dip plating

Publications (3)

Publication Number Publication Date
EP1325163A1 EP1325163A1 (en) 2003-07-09
EP1325163A4 EP1325163A4 (en) 2005-02-16
EP1325163B1 true EP1325163B1 (en) 2008-05-07

Family

ID=18763710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01965631A Expired - Lifetime EP1325163B1 (en) 2000-09-13 2001-09-13 Dual-purpose installation for continuous annealing and hot dip plating

Country Status (12)

Country Link
US (1) US20030189276A1 (en)
EP (1) EP1325163B1 (en)
JP (1) JP2002088414A (en)
KR (1) KR20030027107A (en)
CN (1) CN100357461C (en)
AU (2) AU8623401A (en)
BR (1) BR0113848B1 (en)
CA (1) CA2421925A1 (en)
DE (1) DE60133912D1 (en)
RU (1) RU2255138C2 (en)
TW (1) TW565620B (en)
WO (1) WO2002022894A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5058769B2 (en) * 2007-01-09 2012-10-24 新日本製鐵株式会社 Manufacturing method and manufacturing equipment for high strength cold-rolled steel sheet excellent in chemical conversion processability
BR112012006970B1 (en) * 2009-10-01 2018-04-17 Nippon Steel & Sumitomo Metal Corporation DOUBLE EQUIPMENT FOR CONTINUOUS HOT DIP COATING AND CONTINUOUS RECOVERY
BR112015032429A2 (en) * 2013-06-26 2017-07-25 Jfe Steel Corp combined treatment equipment for hot dip galvanizing of steel sheets and continuous annealing
JP6450109B2 (en) 2014-08-11 2019-01-09 Ｊｆｅスチール株式会社 Steel strip manufacturing equipment
JP6451138B2 (en) * 2014-08-11 2019-01-16 Ｊｆｅスチール株式会社 Steel strip manufacturing method
EP3403736A1 (en) * 2017-05-17 2018-11-21 Primetals Technologies Austria GmbH Guidance of metallic strips in a strip processing system
FR3095452A1 (en) 2019-04-29 2020-10-30 Fives Stein Dual Purpose Metal Strip Continuous Processing Line
RU2769680C2 (en) * 2019-06-13 2022-04-05 Сергей Александрович Ненашев Device for manufacturing steel tape
CN112095061B (en) * 2020-08-31 2024-06-21 广州Jfe钢板有限公司 Production switching production channel and switching method for two different steel plate products

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53132437A (en) * 1977-04-26 1978-11-18 Nippon Steel Corp Continuous treatment facilities for cold rolled steel band
GB2093486B (en) * 1981-02-24 1985-06-26 Kloeckner Werke Ag Plant for the continuous treatment of thin plate or strip
US4408561A (en) * 1981-08-24 1983-10-11 Nippon Steel Corporation Dual-purpose plant for producing cold rolled steel sheet and hot-dip galvanized steel sheet
EP0072874B1 (en) * 1981-08-25 1985-05-29 Nippon Steel Corporation Dual-purpose plant for producing cold rolled steel sheet and hot-dip galvanized steel sheet
JPS5871366A (en) * 1981-10-22 1983-04-28 Nippon Steel Corp Combined manufacturing facility for cold rolled steel plate and zinc hot dipped steel plate
JP2619550B2 (en) * 1990-03-20 1997-06-11 川崎製鉄株式会社 Manufacturing method of galvannealed steel sheet
US5403468A (en) * 1991-03-13 1995-04-04 Kawasaki Steel Corporation Process for the manufacture of tinplate using a fused tin chloride electroplating bath

Also Published As

Publication number Publication date
AU2001286234B2 (en) 2005-06-16
CA2421925A1 (en) 2002-03-21
EP1325163A4 (en) 2005-02-16
WO2002022894A1 (en) 2002-03-21
DE60133912D1 (en) 2008-06-19
TW565620B (en) 2003-12-11
AU8623401A (en) 2002-03-26
RU2255138C2 (en) 2005-06-27
BR0113848B1 (en) 2011-07-12
US20030189276A1 (en) 2003-10-09
EP1325163A1 (en) 2003-07-09
BR0113848A (en) 2003-06-03
KR20030027107A (en) 2003-04-03
CN1452667A (en) 2003-10-29
JP2002088414A (en) 2002-03-27
CN100357461C (en) 2007-12-26

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