JPS5635729A - Cooling method for steel hoop with metallic rotator - Google Patents

Cooling method for steel hoop with metallic rotator

Info

Publication number
JPS5635729A
JPS5635729A JP11044179A JP11044179A JPS5635729A JP S5635729 A JPS5635729 A JP S5635729A JP 11044179 A JP11044179 A JP 11044179A JP 11044179 A JP11044179 A JP 11044179A JP S5635729 A JPS5635729 A JP S5635729A
Authority
JP
Japan
Prior art keywords
hoop
steel
kcal
steel hoop
metallic
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
JP11044179A
Other languages
Japanese (ja)
Other versions
JPS5847456B2 (en
Inventor
Yoshikazu Fukuoka
Masaharu Jitsukawa
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 Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP11044179A priority Critical patent/JPS5847456B2/en
Publication of JPS5635729A publication Critical patent/JPS5635729A/en
Publication of JPS5847456B2 publication Critical patent/JPS5847456B2/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
    • C21D9/5735—Details
    • C21D9/5737—Rolls; Drums; Roll arrangements

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 Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

PURPOSE:To manufacture cold rolled steel sheet having excellent drawability, by cooling rapidly a steel hoop, having been heated in a continuous annealing furnace, with metallic rotators having a specific relation between its shell thickness and its heat conductivity so as to reduce the time for the following overaging. CONSTITUTION:In order to quench a steel hoop, which has been heated so as to be soaked in a continuous annealing apparatus, at >=70 deg.C/sec cooling rate to the overaging temp., the shell thickness delta and the heat conductivity lambda mush satisfy the relation shown by formula I, where delta is in mm., lambda is in kcal/m.h. deg.C, DELTATm is thickness of the steel hoop in m, gamma is specific gravity of the steel hoop in kg/m<3>, Cp is specific heat of the steel hoop in kcal/kg. deg.C, 252 is a constant in deg.C to attain >= deg.C/sec cooling rate, v is flow velocity of cooling water in m/sec, (a) is the gap between the metallic rotator and the metallic hoop in m, 45 is heat conductivity of steel in kcal/m.h. deg.C, and 0.239 is heat conductivity between hoop surface and the metallic rotator in kcal/m.h. deg.C.
JP11044179A 1979-08-31 1979-08-31 Cooling method of steel strip using metal rotating body Expired JPS5847456B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11044179A JPS5847456B2 (en) 1979-08-31 1979-08-31 Cooling method of steel strip using metal rotating body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11044179A JPS5847456B2 (en) 1979-08-31 1979-08-31 Cooling method of steel strip using metal rotating body

Publications (2)

Publication Number Publication Date
JPS5635729A true JPS5635729A (en) 1981-04-08
JPS5847456B2 JPS5847456B2 (en) 1983-10-22

Family

ID=14535794

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11044179A Expired JPS5847456B2 (en) 1979-08-31 1979-08-31 Cooling method of steel strip using metal rotating body

Country Status (1)

Country Link
JP (1) JPS5847456B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5923826A (en) * 1982-07-28 1984-02-07 Mitsubishi Heavy Ind Ltd Cooling method of metallic strip by cooling roll
JPS5993826A (en) * 1982-11-18 1984-05-30 Nippon Kokan Kk <Nkk> Manufacture of soft sheet for tinning
JPS59117913A (en) * 1982-12-22 1984-07-07 Sumitomo Metal Ind Ltd Roll for cooling strip

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5923826A (en) * 1982-07-28 1984-02-07 Mitsubishi Heavy Ind Ltd Cooling method of metallic strip by cooling roll
JPS6231055B2 (en) * 1982-07-28 1987-07-06 Mitsubishi Jukogyo Kk
JPS5993826A (en) * 1982-11-18 1984-05-30 Nippon Kokan Kk <Nkk> Manufacture of soft sheet for tinning
JPS6360101B2 (en) * 1982-11-18 1988-11-22
JPS59117913A (en) * 1982-12-22 1984-07-07 Sumitomo Metal Ind Ltd Roll for cooling strip
JPH0364729B2 (en) * 1982-12-22 1991-10-08 Sumitomo Metal Ind

Also Published As

Publication number Publication date
JPS5847456B2 (en) 1983-10-22

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