JPS5760030A - Method for controlling cooling - Google Patents

Method for controlling cooling

Info

Publication number
JPS5760030A
JPS5760030A JP13546980A JP13546980A JPS5760030A JP S5760030 A JPS5760030 A JP S5760030A JP 13546980 A JP13546980 A JP 13546980A JP 13546980 A JP13546980 A JP 13546980A JP S5760030 A JPS5760030 A JP S5760030A
Authority
JP
Japan
Prior art keywords
qtau
change
cooling
refrigerant
sec
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
JP13546980A
Other languages
Japanese (ja)
Other versions
JPS61890B2 (en
Inventor
Tadashi Kato
Toshimasa Takashima
Katsuhiko Yui
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 JP13546980A priority Critical patent/JPS5760030A/en
Publication of JPS5760030A publication Critical patent/JPS5760030A/en
Publication of JPS61890B2 publication Critical patent/JPS61890B2/ja
Granted 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
    • 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

Abstract

PURPOSE:To permit dealing with a transient state by using specific relations in controlling a cooling end point temp. and cooling rates to desired values by controlling the injection rate of refrigerant from nozzles to materials to be cooled. CONSTITUTION:The equationsI, II (W: refrigerant flow density m<3>, m<2> sec., h: strip thickness mm., v: transfer speed m/min, le: effective cooling length, m, k1- K3: constants, alpha: the coefft. determined by nozzle shape, Ti, To: cooling start and end point temps. deg.C, Qtau: total refrigerant flow rate m<3>/sec, CR: cooling rate deg.C/ sec) are used for controlling the injection rates of refrigerant of multiple headers H11, H12- in the transfer direction of a strip 10. At the changing of strip thickness under operation at said le and Qtau, the ratio C1 is determined by the equation III (h, h' and Qtau' Qtau' are the values before and after the change), and the injection rates of refrigerant are successively corrected. When the transfer speed changes during the same operation, the Qtau is changed simultaneously by the equation II, and when the le change exceeds the permissible range, it is changed so as to enter the range, and the Qtau by the change thereof is corrected. This correction is applied upon each nozzle when the imaginary change point showing the strip 10 boundary for presence or absence of the le change passes each nozzle.
JP13546980A 1980-09-29 1980-09-29 Method for controlling cooling Granted JPS5760030A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13546980A JPS5760030A (en) 1980-09-29 1980-09-29 Method for controlling cooling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13546980A JPS5760030A (en) 1980-09-29 1980-09-29 Method for controlling cooling

Publications (2)

Publication Number Publication Date
JPS5760030A true JPS5760030A (en) 1982-04-10
JPS61890B2 JPS61890B2 (en) 1986-01-11

Family

ID=15152435

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13546980A Granted JPS5760030A (en) 1980-09-29 1980-09-29 Method for controlling cooling

Country Status (1)

Country Link
JP (1) JPS5760030A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015504973A (en) * 2011-12-15 2015-02-16 ポスコ Method and apparatus for controlling strip temperature in quench zone in continuous annealing line
JP2015038233A (en) * 2013-08-19 2015-02-26 Ｊｆｅスチール株式会社 Method and installation for production of steel strip
JP2015038234A (en) * 2013-08-19 2015-02-26 Ｊｆｅスチール株式会社 Method and installation for production of steel strip

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015504973A (en) * 2011-12-15 2015-02-16 ポスコ Method and apparatus for controlling strip temperature in quench zone in continuous annealing line
US9783867B2 (en) 2011-12-15 2017-10-10 Posco Method and apparatus for controlling the strip temperature of the rapid cooling section of a continuous annealing line
JP2015038233A (en) * 2013-08-19 2015-02-26 Ｊｆｅスチール株式会社 Method and installation for production of steel strip
JP2015038234A (en) * 2013-08-19 2015-02-26 Ｊｆｅスチール株式会社 Method and installation for production of steel strip

Also Published As

Publication number Publication date
JPS61890B2 (en) 1986-01-11

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