JPS5534656A - Manufacture of high tensile cold rolled steel plate with low yield ratio and high r value - Google Patents

Manufacture of high tensile cold rolled steel plate with low yield ratio and high r value

Info

Publication number
JPS5534656A
JPS5534656A JP10705478A JP10705478A JPS5534656A JP S5534656 A JPS5534656 A JP S5534656A JP 10705478 A JP10705478 A JP 10705478A JP 10705478 A JP10705478 A JP 10705478A JP S5534656 A JPS5534656 A JP S5534656A
Authority
JP
Japan
Prior art keywords
steel plate
cold rolled
manufacture
yield ratio
value
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
JP10705478A
Other languages
Japanese (ja)
Inventor
Masashi Takahashi
Atsuki Okamoto
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
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP10705478A priority Critical patent/JPS5534656A/en
Publication of JPS5534656A publication Critical patent/JPS5534656A/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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing

Abstract

PURPOSE:To manufacture the title plate with superior press formability by coiling a steel plate esp. contg. an adequate amt. of P and sol. Al at below a predetermined temp. followed by cold rolling and recrystallization annealing by soaking at a specified temp. CONSTITUTION:Steel contg. C 0.01-0.15%, Si 0.30%, Mn 1.6-3.0%, P 0.04- 0.20% and sol. Al 0.02-0.30% is hot rolled at 800-870 deg.C, coiled at below 600 deg.C, e.g. 550 deg.C, cold rolled, and soaked at 660-750 deg.C, e.g. 690 deg.C for above 30 min in a bell type annealing furnace or the like to carry out recrystallization annealing, thus obtaining a high tensile cold rolled steel plate having a tensile strength above 40 kg/cm<2>, an yield ratio below 0.60 and r value above 1.5.
JP10705478A 1978-08-31 1978-08-31 Manufacture of high tensile cold rolled steel plate with low yield ratio and high r value Pending JPS5534656A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10705478A JPS5534656A (en) 1978-08-31 1978-08-31 Manufacture of high tensile cold rolled steel plate with low yield ratio and high r value

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10705478A JPS5534656A (en) 1978-08-31 1978-08-31 Manufacture of high tensile cold rolled steel plate with low yield ratio and high r value

Publications (1)

Publication Number Publication Date
JPS5534656A true JPS5534656A (en) 1980-03-11

Family

ID=14449326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10705478A Pending JPS5534656A (en) 1978-08-31 1978-08-31 Manufacture of high tensile cold rolled steel plate with low yield ratio and high r value

Country Status (1)

Country Link
JP (1) JPS5534656A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62139848A (en) * 1985-12-11 1987-06-23 Kobe Steel Ltd High strength and high ductility cold rolled steel sheet for automobile strengthening member
US7776161B2 (en) * 2001-08-24 2010-08-17 Nippon Steel Corporation Cold-rolled steel sheet excellent in workability
CN104294145A (en) * 2014-10-20 2015-01-21 山东钢铁股份有限公司 Bell-type annealing treatment-based cold rolled steel with tensile strength of 600MPa, and preparation method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51107218A (en) * 1975-03-19 1976-09-22 Nippon Kokan Kk Buruuinguoshojinai kochoryokureienkohanno seizohoho

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51107218A (en) * 1975-03-19 1976-09-22 Nippon Kokan Kk Buruuinguoshojinai kochoryokureienkohanno seizohoho

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62139848A (en) * 1985-12-11 1987-06-23 Kobe Steel Ltd High strength and high ductility cold rolled steel sheet for automobile strengthening member
US7776161B2 (en) * 2001-08-24 2010-08-17 Nippon Steel Corporation Cold-rolled steel sheet excellent in workability
CN104294145A (en) * 2014-10-20 2015-01-21 山东钢铁股份有限公司 Bell-type annealing treatment-based cold rolled steel with tensile strength of 600MPa, and preparation method thereof

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