ATE245710T1 - PRIMARY COOLING PROCESS FOR CONTINUOUS ANNEALING OF STEEL STRIPS - Google Patents

PRIMARY COOLING PROCESS FOR CONTINUOUS ANNEALING OF STEEL STRIPS

Info

Publication number
ATE245710T1
ATE245710T1 AT97105044T AT97105044T ATE245710T1 AT E245710 T1 ATE245710 T1 AT E245710T1 AT 97105044 T AT97105044 T AT 97105044T AT 97105044 T AT97105044 T AT 97105044T AT E245710 T1 ATE245710 T1 AT E245710T1
Authority
AT
Austria
Prior art keywords
gas
cooling
steel strips
primary cooling
cooling process
Prior art date
Application number
AT97105044T
Other languages
German (de)
Inventor
Tatsunori Mine
Koichi Sakurai
Kouichi Waki
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=15044183&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ATE245710(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Application granted granted Critical
Publication of ATE245710T1 publication Critical patent/ATE245710T1/en

Links

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
    • C21D9/573—Continuous furnaces for strip or wire with 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • 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

Landscapes

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

Abstract

In a primary cooling method in continuously annealing steel strips which comprises a heating step (A), a soaking step (B), a primary cooling step (C) including at least a rapid cooling step in a second half thereof, an overaging step (D), and a final cooling step (E), inert atmosphere gas containing H2 gas is employed as cooling gas for use in the rapid cooling step and concentration of the H2 gas is switched between two ranges of low and high concentrations of H2 gas, depending on the required cooling rate of the rapid cooling step corresponding to the product grades of steel strips (26). Accordingly, the consumption of expensive H2 gas is reduced thus enhancing the economy of the cooling operation while assuring the safety and efficiency of the primary cooling operation. <IMAGE>
AT97105044T 1996-04-26 1997-03-25 PRIMARY COOLING PROCESS FOR CONTINUOUS ANNEALING OF STEEL STRIPS ATE245710T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13085196 1996-04-26

Publications (1)

Publication Number Publication Date
ATE245710T1 true ATE245710T1 (en) 2003-08-15

Family

ID=15044183

Family Applications (1)

Application Number Title Priority Date Filing Date
AT97105044T ATE245710T1 (en) 1996-04-26 1997-03-25 PRIMARY COOLING PROCESS FOR CONTINUOUS ANNEALING OF STEEL STRIPS

Country Status (3)

Country Link
EP (1) EP0803583B2 (en)
AT (1) ATE245710T1 (en)
DE (1) DE69723608T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9929956D0 (en) 1999-12-17 2000-02-09 Boc Group Plc Qenching heated metallic objects
US6533996B2 (en) * 2001-02-02 2003-03-18 The Boc Group, Inc. Method and apparatus for metal processing
JP4593976B2 (en) * 2004-05-31 2010-12-08 株式会社神戸製鋼所 Gas jet cooling device for steel plate in continuous annealing furnace
FR2876710B1 (en) 2004-10-19 2014-12-26 Kappa Thermline METHOD AND DEVICE FOR LIMITING THE VIBRATION OF STEEL OR ALUMINUM BANDS IN GAS OR AIR BLOWING COOLING ZONES
DE102013114578A1 (en) * 2013-12-19 2015-06-25 Sandvik Materials Technology Deutschland Gmbh Annealing furnace and method for annealing a steel strand

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR8504750A (en) * 1984-11-14 1986-07-22 Nippon Steel Corp STRIP COATING APPLIANCE FOR A CONTINUOUS IRONING OVEN
DE3736501C1 (en) * 1987-10-28 1988-06-09 Degussa Process for the heat treatment of metallic workpieces
US5137586A (en) * 1991-01-02 1992-08-11 Klink James H Method for continuous annealing of metal strips
JPH06346156A (en) * 1993-06-07 1994-12-20 Nippon Steel Corp Method for cooling steel sheet by gas jet
TW420718B (en) * 1995-12-26 2001-02-01 Nippon Steel Corp Primary cooling method in continuously annealing steel strip

Also Published As

Publication number Publication date
EP0803583B2 (en) 2009-12-16
DE69723608T2 (en) 2004-05-13
EP0803583A2 (en) 1997-10-29
EP0803583A3 (en) 1999-01-20
DE69723608T3 (en) 2010-07-01
DE69723608D1 (en) 2003-08-28
EP0803583B1 (en) 2003-07-23

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