JPS5591929A - Method and facility for continuous annealing of cold rolled steel strip - Google Patents

Method and facility for continuous annealing of cold rolled steel strip

Info

Publication number
JPS5591929A
JPS5591929A JP16280878A JP16280878A JPS5591929A JP S5591929 A JPS5591929 A JP S5591929A JP 16280878 A JP16280878 A JP 16280878A JP 16280878 A JP16280878 A JP 16280878A JP S5591929 A JPS5591929 A JP S5591929A
Authority
JP
Japan
Prior art keywords
cooling
zone
strip
steel strip
overaging
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
JP16280878A
Other languages
Japanese (ja)
Other versions
JPS5813611B2 (en
Inventor
Nobuyuki Takahashi
Satoyuki Kitajima
Ichiro Shinbashi
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
Priority to JP53162808A priority Critical patent/JPS5813611B2/en
Publication of JPS5591929A publication Critical patent/JPS5591929A/en
Publication of JPS5813611B2 publication Critical patent/JPS5813611B2/en
Expired legal-status Critical Current

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

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 Sheet Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

PURPOSE:To manufacture the steel strip having a least strain aging propety even if quenching after overaging treatment, by carring out the overaging treatment in two specific steps, at the time of carrying out continuous annealing of low carbon cold rolled steel strip. CONSTITUTION:Low carbon cold rolled steel strip uncoiled from the payoff reel 1, heated higher than the recrystallization temperature at the heating zone 6 of continuous annealing furnace. The above strip is cooled to 500 deg.C or less at the cooling zone 8 by the gas jet cleaning process after heating uniformly in the soaking zone 7 and next, is kept at 350-500 deg.C for twenty seconds in the primary overaging zone 9. Then, the strip is cooled to 50 deg.C or less at the cooling speed of 50 deg.C or less at the cooling speed of 50 deg.C/sec. or more in the cooling part 11 after cooling slowly to 250- 330 deg.C at the cooling speed of 2-10 deg.C/sec. in the secondary overaging zone 10 and carrying out the secondary overaging treatment. The above cooling is carried out by a spray of cold water or dipping in cold water and oxidation of the strip surface is prevented and also, rising of atmosphere dew point of the zone 10 is prevented. Lastly, the strip having the same low aging property and mechanical property as usual slow cooling, is manufactured passing through the skin-pass roller 15.
JP53162808A 1978-12-29 1978-12-29 Continuous annealing method and equipment for cold rolled steel strip Expired JPS5813611B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53162808A JPS5813611B2 (en) 1978-12-29 1978-12-29 Continuous annealing method and equipment for cold rolled steel strip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53162808A JPS5813611B2 (en) 1978-12-29 1978-12-29 Continuous annealing method and equipment for cold rolled steel strip

Publications (2)

Publication Number Publication Date
JPS5591929A true JPS5591929A (en) 1980-07-11
JPS5813611B2 JPS5813611B2 (en) 1983-03-15

Family

ID=15761606

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53162808A Expired JPS5813611B2 (en) 1978-12-29 1978-12-29 Continuous annealing method and equipment for cold rolled steel strip

Country Status (1)

Country Link
JP (1) JPS5813611B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5613438A (en) * 1979-07-13 1981-02-09 Kawasaki Steel Corp Preparation of cold rolled steel sheet for reduction of area having superior aging resistance by continuous annealing
US4443272A (en) * 1981-09-19 1984-04-17 Nippon Steel Corporation Process for producing cold rolled steel sheets having excellent press formability and ageing property
KR100814610B1 (en) 2006-12-30 2008-03-18 현대하이스코 주식회사 Manufacturing process for structural, high-tensile galvanized steel sheet
CN113549736A (en) * 2021-06-22 2021-10-26 鞍钢蒂森克虏伯（重庆）汽车钢有限公司 Technological method for stably controlling bake-hardening steel BH2

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4953116A (en) * 1972-09-26 1974-05-23
JPS53108013A (en) * 1977-03-03 1978-09-20 Nippon Kokan Kk <Nkk> Cooling method for steel sheet at continuous anneallng
JPS53132418A (en) * 1977-04-26 1978-11-18 Nippon Kokan Kk <Nkk> Continuous treating equipment including overaging treatment zone

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4953116A (en) * 1972-09-26 1974-05-23
JPS53108013A (en) * 1977-03-03 1978-09-20 Nippon Kokan Kk <Nkk> Cooling method for steel sheet at continuous anneallng
JPS53132418A (en) * 1977-04-26 1978-11-18 Nippon Kokan Kk <Nkk> Continuous treating equipment including overaging treatment zone

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5613438A (en) * 1979-07-13 1981-02-09 Kawasaki Steel Corp Preparation of cold rolled steel sheet for reduction of area having superior aging resistance by continuous annealing
JPS5839890B2 (en) * 1979-07-13 1983-09-02 川崎製鉄株式会社 Method for producing cold-rolled steel sheets for drawing with excellent aging resistance through continuous annealing
US4443272A (en) * 1981-09-19 1984-04-17 Nippon Steel Corporation Process for producing cold rolled steel sheets having excellent press formability and ageing property
US4981531A (en) * 1981-09-19 1991-01-01 Nippon Steel Corporation Process for producing cold rolled steel sheets having excellent press formability and ageing property
KR100814610B1 (en) 2006-12-30 2008-03-18 현대하이스코 주식회사 Manufacturing process for structural, high-tensile galvanized steel sheet
CN113549736A (en) * 2021-06-22 2021-10-26 鞍钢蒂森克虏伯（重庆）汽车钢有限公司 Technological method for stably controlling bake-hardening steel BH2
CN113549736B (en) * 2021-06-22 2023-01-03 鞍钢蒂森克虏伯（重庆）汽车钢有限公司 Technological method for stably controlling baking hardening steel BH2

Also Published As

Publication number Publication date
JPS5813611B2 (en) 1983-03-15

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