JPS5538980A - Manufacture of low yield point, high tensile seel plate with superior workability - Google Patents

Manufacture of low yield point, high tensile seel plate with superior workability

Info

Publication number
JPS5538980A
JPS5538980A JP11273378A JP11273378A JPS5538980A JP S5538980 A JPS5538980 A JP S5538980A JP 11273378 A JP11273378 A JP 11273378A JP 11273378 A JP11273378 A JP 11273378A JP S5538980 A JPS5538980 A JP S5538980A
Authority
JP
Japan
Prior art keywords
plate
manufacture
high tensile
steel
low yield
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
JP11273378A
Other languages
Japanese (ja)
Inventor
Koichi Hashiguchi
Minoru Nishida
Toshiyuki Kato
Tomoo Tanaka
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 JP11273378A priority Critical patent/JPS5538980A/en
Publication of JPS5538980A publication Critical patent/JPS5538980A/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

Abstract

PURPOSE:To manufacture the title plate having a ferrite + martensite structure by regulating the Mo and Cr contents of steel contg. C, Mn, Si, Al and S followed by rolling, heating, cooling and coiling under specified conditions. CONSTITUTION:Steel is made consisting of, by wt., C; 0.02-0.15%, Mn; 0.9- 2.0%, Si; 0.2-3.0%, Al<=0.10%, S<=0.02%, Cr and/or Mo; 0.15-2.0% (Mo; 0.15-0.10%), and the balance Fe and inevitable impurities. This steel is hot rolled, cold rolled, heated to a temp. from the A1 transformation point to the Ar3 transformation point, cooled at a cooling rate of 1 deg.C/set or more, coiled at 250- 600 deg.C, and cooled. By this process a low yield point, high tensile steel plate is manufactured having a mixed structure based on ferrite and martensite and exhibiting superior workability such as an yield ratio of 65% or below.
JP11273378A 1978-09-12 1978-09-12 Manufacture of low yield point, high tensile seel plate with superior workability Pending JPS5538980A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11273378A JPS5538980A (en) 1978-09-12 1978-09-12 Manufacture of low yield point, high tensile seel plate with superior workability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11273378A JPS5538980A (en) 1978-09-12 1978-09-12 Manufacture of low yield point, high tensile seel plate with superior workability

Publications (1)

Publication Number Publication Date
JPS5538980A true JPS5538980A (en) 1980-03-18

Family

ID=14594173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11273378A Pending JPS5538980A (en) 1978-09-12 1978-09-12 Manufacture of low yield point, high tensile seel plate with superior workability

Country Status (1)

Country Link
JP (1) JPS5538980A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56149286A (en) * 1980-04-18 1981-11-19 Koichi Uemura Various submarine operation and equipment therefor
JPS61257457A (en) * 1985-05-07 1986-11-14 Kobe Steel Ltd Steel sheet for laser processing having superior fatigue characteristic

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56149286A (en) * 1980-04-18 1981-11-19 Koichi Uemura Various submarine operation and equipment therefor
JPS61257457A (en) * 1985-05-07 1986-11-14 Kobe Steel Ltd Steel sheet for laser processing having superior fatigue characteristic
JPH0514782B2 (en) * 1985-05-07 1993-02-25 Kobe Steel Ltd

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