JPS5662917A - Method and apparatus of continuous annealing of composite structure steel plate - Google Patents

Method and apparatus of continuous annealing of composite structure steel plate

Info

Publication number
JPS5662917A
JPS5662917A JP13967479A JP13967479A JPS5662917A JP S5662917 A JPS5662917 A JP S5662917A JP 13967479 A JP13967479 A JP 13967479A JP 13967479 A JP13967479 A JP 13967479A JP S5662917 A JPS5662917 A JP S5662917A
Authority
JP
Japan
Prior art keywords
steel plate
austenite
temp
amount
quenching
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
JP13967479A
Other languages
Japanese (ja)
Other versions
JPS5938287B2 (en
Inventor
Akiya Yagishima
Yuji Shimoyama
Yasuhiko Masuno
Yukio Ida
Hideo Sunami
Munetoshi Suzuki
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.)
JFE Steel Corp
Original Assignee
Kawasaki 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP13967479A priority Critical patent/JPS5938287B2/en
Publication of JPS5662917A publication Critical patent/JPS5662917A/en
Publication of JPS5938287B2 publication Critical patent/JPS5938287B2/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
    • 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

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)
  • Control Of Heat Treatment Processes (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

PURPOSE:To improve strength and ductility by controlling quenching rate and properly adjusting martensite formation amount at the time of continuously annealing a steel plate by quenching the same from two phase region temperatures of ferrite and austenite. CONSTITUTION:At the time of continuously annealing a steel plate 8, it is heated to the temp. region where the two phases of ferrite and austenite coexist in structure in a heating zone, whereby it is made into two-phase structure, after which it is quenched in the quenching zone 28 in succession to the soaking zone. In this case, the austenite amount in the steel plate which has passed a cooling unit 50 is measured with an austenite amount measuring device 56 by an X-ray diffraction method provided in the quenching zone 28. This measured value is put together with the temp. measured value of the steel plate by a thermometer 54 into a calculator 58. An upper stream side cooler 50 is controlled by this calculator 59 so that the temp. of the steel plate becomes the temp. just above the initiation of martensite deposition; in addition, the steel plate conveying speed is so controlled that the austenite amount detected with the measuring device 56 becomes the predetermined amount corresponding to the martensite amount in the product, whereby the steel plate cooling rate is properly controlled.
JP13967479A 1979-10-29 1979-10-29 Continuous annealing method and device for composite structure steel plate Expired JPS5938287B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13967479A JPS5938287B2 (en) 1979-10-29 1979-10-29 Continuous annealing method and device for composite structure steel plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13967479A JPS5938287B2 (en) 1979-10-29 1979-10-29 Continuous annealing method and device for composite structure steel plate

Publications (2)

Publication Number Publication Date
JPS5662917A true JPS5662917A (en) 1981-05-29
JPS5938287B2 JPS5938287B2 (en) 1984-09-14

Family

ID=15250769

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13967479A Expired JPS5938287B2 (en) 1979-10-29 1979-10-29 Continuous annealing method and device for composite structure steel plate

Country Status (1)

Country Link
JP (1) JPS5938287B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016100811A1 (en) 2015-09-25 2017-03-30 Sms Group Gmbh Method and determination of the structural components in an annealing line
WO2020249820A2 (en) 2019-06-14 2020-12-17 Sms Group Gmbh Device and method for the contactless determination of at least one property of a metal product

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016100811A1 (en) 2015-09-25 2017-03-30 Sms Group Gmbh Method and determination of the structural components in an annealing line
WO2020249820A2 (en) 2019-06-14 2020-12-17 Sms Group Gmbh Device and method for the contactless determination of at least one property of a metal product
WO2020249820A3 (en) * 2019-06-14 2021-02-18 Sms Group Gmbh Device and method for the contactless determination of at least one property of a metal product
US12025553B2 (en) 2019-06-14 2024-07-02 Sms Group Gmbh Device and method for the contactless determination of at least one property of a metal product

Also Published As

Publication number Publication date
JPS5938287B2 (en) 1984-09-14

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