AU2001286234B2 - 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
AU2001286234B2
AU2001286234B2 AU2001286234A AU2001286234A AU2001286234B2 AU 2001286234 B2 AU2001286234 B2 AU 2001286234B2 AU 2001286234 A AU2001286234 A AU 2001286234A AU 2001286234 A AU2001286234 A AU 2001286234A AU 2001286234 B2 AU2001286234 B2 AU 2001286234B2
Authority
AU
Australia
Prior art keywords
facility
continuous annealing
coating
hot dip
steel sheet
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
AU2001286234A
Other versions
AU2001286234A1 (en
Inventor
Masanori Hoshino
Nobuyoshi Okada
Motofumi Takemura
Kouichi Terahara
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 AU2001286234A1 publication Critical patent/AU2001286234A1/en
Application granted granted Critical
Publication of AU2001286234B2 publication Critical patent/AU2001286234B2/en
Assigned to NIPPON STEEL & SUMITOMO METAL CORPORATION reassignment NIPPON STEEL & SUMITOMO METAL CORPORATION Request to Amend Deed and Register Assignors: NIPPON STEEL CORPORATION
Assigned to NIPPON STEEL CORPORATION reassignment NIPPON STEEL CORPORATION Request to Amend Deed and Register Assignors: NIPPON STEEL & SUMITOMO METAL CORPORATION
Anticipated expiration legal-status Critical
Ceased 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

Description

WO 02/22894 PCT/JP01/07969 1
DESCRIPTION
DUAL-PURPOSE INSTALLATION FOR CONTINUOUS ANNEALING AND HOT DIP PLATING TECHNICAL FIELD 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 the single installation.
BACKGROUND ART 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 the single installation is proposed in Japanese Unexamined Patent Publication No. S55-6469 or Japanese Patent Application No. H11-5298.
Japanese Unexamined Patent Publication No. S55-6469 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.
Japanese Patent Application No. HI1-5298 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.
Summary of the Invention 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.
According to a first aspect of the invention there is provided a dual-purpose installation for continuous annealing and hot dip plating wherein at least a continuous annealing furnace, a coating pot, a coating facility and a water quenching facility are arranged in the form of a processing line along the travelling direction of a steel sheet, characterized by having a bypass facility enabling a steel sheet to be led from the continuous annealing furnace directly to the water quenching facility without being exposed to the outside atmosphere and the interior of the bypass facility being kept filled with a non-oxidizing atmosphere composed of 5-10% H 2 and 95-90% N 2 According to a second aspect of the invention there is provided a dual-purpose installation for continuous annealing and hot dip plating according to the first aspect of the invention, wherein the installation has an alloying furnace, a steel sheet cooling unit, or both of them following to a coating pot and a coating facility and being equipped with the bypass facility.
According to a third aspect of the invention there is provided a dual-purpose installation for continuous annealing and hot dip plating according to the first or second aspect of the invention, wherein the coating pot, the coating facility and a crane are installed beneath the bypass facility, thereby enabling the coating facility and the equipment in the coating pot to be transported by the crane to be repaired.
Brief Description of the Drawings SFig. 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 most preferred embodiments s 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 00 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 WO 02/22894 PCT/JP01/07969 4 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 H 2 and 95 to 90% of
N
2 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.
INDUSTRIAL AVAILABILITY 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 WO 02/22894 PCT/JP01/07969 5 the production of a continuously annealed product, and thus enhance production efficiency.

Claims (4)

1. A dual-purpose installation for continuous annealing and hot dip plating Swherein at least a continuous annealing furnace, a coating pot, a coating facility and a N water quenching facility are arranged in the form of a processing line along the travelling direction of a steel sheet, characterized by having a bypass facility enabling a steel sheet to be led from the continuous annealing furnace directly to the water quenching facility i without being exposed to the outside atmosphere and the interior of the bypass facility 0 being kept filled with a non-oxidizing atmosphere composed of 5-10% H 2 and 95-90% N 2
2. A dual-purpose installation for continuous annealing and hot dip plating according to claim 1, wherein the installation has an alloying furnace, a steel sheet cooling unit, or both of them following to a coating pot and a coating facility and being equipped with the bypass facility.
3. A dual-purpose installation for continuous annealing and hot dip plating according to claim 1 or 2, wherein the coating pot, the coating facility and a crane are installed beneath the bypass facility, thereby enabling the coating facility and the equipment in the coating pot to be transported by the crane to be repaired.
4. A dual-purpose installation for continuous annealing and hot dip plating, wherein at least a continuous annealing furnace, a coating pot, a coating facility and a water quenching facility are arranged in the form of a processing line along the travelling direction of a steel sheet, substantially as hereinbefore described with reference to the accompanying drawings. Dated 25 May, 2005 Nippon Steel Corporation Patent Attorneys for the Applicant/Nominated Person SPRUSON FERGUSON [R:\LIBH]05231 .doc:aak
AU2001286234A 2000-09-13 2001-09-13 Dual-purpose installation for continuous annealing and hot dip plating Ceased AU2001286234B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2000278566A JP2002088414A (en) 2000-09-13 2000-09-13 Facility used for both of continuous annealing and hot dip metal coating
JP2000-278566 2000-09-13
PCT/JP2001/007969 WO2002022894A1 (en) 2000-09-13 2001-09-13 Dual-purpose installation for continuous annealing and hot dip plating

Publications (2)

Publication Number Publication Date
AU2001286234A1 AU2001286234A1 (en) 2002-06-13
AU2001286234B2 true AU2001286234B2 (en) 2005-06-16

Family

ID=18763710

Family Applications (2)

Application Number Title Priority Date Filing Date
AU8623401A Pending AU8623401A (en) 2000-09-13 2001-09-13 Dual-purpose installation for continuous annealing and hot dip plating
AU2001286234A Ceased AU2001286234B2 (en) 2000-09-13 2001-09-13 Dual-purpose installation for continuous annealing and hot dip plating

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AU8623401A Pending AU8623401A (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
CN102656286B (en) * 2009-10-01 2013-09-04 新日铁住金株式会社 Facility used for both continuous hot-dip coating and continuous annealing
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
CN112095061A (en) * 2020-08-31 2020-12-18 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
DE3170723D1 (en) * 1981-08-25 1985-07-04 Nippon Steel Corp 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
CA2421925A1 (en) 2002-03-21
BR0113848A (en) 2003-06-03
KR20030027107A (en) 2003-04-03
BR0113848B1 (en) 2011-07-12
CN100357461C (en) 2007-12-26
EP1325163A4 (en) 2005-02-16
EP1325163A1 (en) 2003-07-09
AU8623401A (en) 2002-03-26
TW565620B (en) 2003-12-11
WO2002022894A1 (en) 2002-03-21
EP1325163B1 (en) 2008-05-07
US20030189276A1 (en) 2003-10-09
CN1452667A (en) 2003-10-29
DE60133912D1 (en) 2008-06-19
RU2255138C2 (en) 2005-06-27
JP2002088414A (en) 2002-03-27

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FGA Letters patent sealed or granted (standard patent)
HB Alteration of name in register

Owner name: NIPPON STEEL CORPORATION

Free format text: FORMER NAME(S): NIPPON STEEL & SUMITOMO METAL CORPORATION

MK14 Patent ceased section 143(a) (annual fees not paid) or expired