JPS5665931A - Manufacture of cold-rolled steel sheet for press formation - Google Patents

Manufacture of cold-rolled steel sheet for press formation

Info

Publication number
JPS5665931A
JPS5665931A JP14164079A JP14164079A JPS5665931A JP S5665931 A JPS5665931 A JP S5665931A JP 14164079 A JP14164079 A JP 14164079A JP 14164079 A JP14164079 A JP 14164079A JP S5665931 A JPS5665931 A JP S5665931A
Authority
JP
Japan
Prior art keywords
steel sheet
overaging
temp
strain
cold
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.)
Pending
Application number
JP14164079A
Other languages
Japanese (ja)
Inventor
Masatoshi Sudo
Ichiro Tsukatani
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP14164079A priority Critical patent/JPS5665931A/en
Publication of JPS5665931A publication Critical patent/JPS5665931A/en
Pending 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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets

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)

Abstract

PURPOSE:To impart excellent press formability comparable to that obtained by batch annealing, by performing simultaneous quenching and strain developing of cold rolled steel sheet having been recrystallization-annealed with a water-cooled roll, then by overaging the steel sheet while cooling slowly. CONSTITUTION:Cold-rolled steel sheet is heated rapidly from room temp. T0 to a temp. T1 which is not lower than the recrystallization temp. so as to perform recrystallization-annealing. The recrystallized steel sheet is quenched at 50-500 deg.C/sec cooling rate C2 by passing it between plural water-cooled rolls, at the same time 0.2-3% strain is imparted to the steel sheet. That is, the oversaturation of solid soln. carbon is increased at the step, and dislocation is introduced by strain, and the overaging time is reduced by the quick decrease in carbide and solid soln. carbon which precipitates during overaging process. Then the steel sheet having been imparted with strain is slowly cooled continuously or stepwise so as to overage it. The slow-cooling rate from the starting temp. T5 of overaging to the final temp. T6 (250-400 deg.C) of the overaging is set at 10-100 deg.C/min, and the overaging may be completed in about 2-8min.
JP14164079A 1979-10-31 1979-10-31 Manufacture of cold-rolled steel sheet for press formation Pending JPS5665931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14164079A JPS5665931A (en) 1979-10-31 1979-10-31 Manufacture of cold-rolled steel sheet for press formation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14164079A JPS5665931A (en) 1979-10-31 1979-10-31 Manufacture of cold-rolled steel sheet for press formation

Publications (1)

Publication Number Publication Date
JPS5665931A true JPS5665931A (en) 1981-06-04

Family

ID=15296740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14164079A Pending JPS5665931A (en) 1979-10-31 1979-10-31 Manufacture of cold-rolled steel sheet for press formation

Country Status (1)

Country Link
JP (1) JPS5665931A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0360955A2 (en) * 1988-09-28 1990-04-04 Nippon Steel Corporation Process for producing a cold rolled steel sheet having a good ageing resistance by continuous annealing
JPH02242749A (en) * 1989-02-24 1990-09-27 Oscar Mayer Foods Corp Flexible package to be sealed again for disclosing mischief
US10202299B2 (en) 2013-08-28 2019-02-12 Nippon Electric Glass Co., Ltd. Glass film ribbon manufacturing method and glass film ribbon manufacturing device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0360955A2 (en) * 1988-09-28 1990-04-04 Nippon Steel Corporation Process for producing a cold rolled steel sheet having a good ageing resistance by continuous annealing
JPH02242749A (en) * 1989-02-24 1990-09-27 Oscar Mayer Foods Corp Flexible package to be sealed again for disclosing mischief
US10202299B2 (en) 2013-08-28 2019-02-12 Nippon Electric Glass Co., Ltd. Glass film ribbon manufacturing method and glass film ribbon manufacturing device

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