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JPS56166332A - Manufacture of high strength steel plate having low yield ratio, superior workability and composite structure - Google Patents

Manufacture of high strength steel plate having low yield ratio, superior workability and composite structure

Info

Publication number
JPS56166332A
JPS56166332A JP6777080A JP6777080A JPS56166332A JP S56166332 A JPS56166332 A JP S56166332A JP 6777080 A JP6777080 A JP 6777080A JP 6777080 A JP6777080 A JP 6777080A JP S56166332 A JPS56166332 A JP S56166332A
Authority
JP
Japan
Prior art keywords
steel plate
temp
high strength
steel
strength steel
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
JP6777080A
Other languages
Japanese (ja)
Inventor
Yoshimitsu Uto
Teishiro Watanabe
Jun Kadoi
Keiichi Yamamoto
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP6777080A priority Critical patent/JPS56166332A/en
Publication of JPS56166332A publication Critical patent/JPS56166332A/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)
  • Heat Treatment Of Steel (AREA)

Abstract

PURPOSE:To obtain a high strength steel plate without deteriorating the workability by applying a working at a specified temp. and a specified reduction ratio in a rapid cooling process when steel contg. a specified percentage of C, Mn and other element is annealed after hot rolling and cold rolling. CONSTITUTION:Steel is prepared consisting of 0.03-0.15wt% C, 0.6-1.8 wt% Mn as an element stabilizing the austenite phase and the balance Fe with inevitable impurities or further contg. >=1 kinds of other elements such as Cr and Mo stabilizing the austenite phase. The amount of Cr is adjusted to >= about 0.2wt%,and that of Mo to about 0.1wt%. The steel is mill-finished by ordinary hot rolling, coiled, and continuously annealed at 730-880 C as hot rolled or after cold rolling. During rapid cooling from the heating temp. a working is applied at 250-520 deg.C intermediate temp. T deg.C and 2-20% reduction ratio. Thus, a steel plate having a structure composed principally of ferrite phase and low temp. transformation phase is obtd.
JP6777080A 1980-05-23 1980-05-23 Manufacture of high strength steel plate having low yield ratio, superior workability and composite structure Pending JPS56166332A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6777080A JPS56166332A (en) 1980-05-23 1980-05-23 Manufacture of high strength steel plate having low yield ratio, superior workability and composite structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6777080A JPS56166332A (en) 1980-05-23 1980-05-23 Manufacture of high strength steel plate having low yield ratio, superior workability and composite structure

Publications (1)

Publication Number Publication Date
JPS56166332A true JPS56166332A (en) 1981-12-21

Family

ID=13354503

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6777080A Pending JPS56166332A (en) 1980-05-23 1980-05-23 Manufacture of high strength steel plate having low yield ratio, superior workability and composite structure

Country Status (1)

Country Link
JP (1) JPS56166332A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4885041A (en) * 1987-09-01 1989-12-05 Hoogovens, Groep B.V. Method for the manufacture of formable steel strip
KR100957993B1 (en) * 2002-10-31 2010-05-17 주식회사 포스코 Manufacturing method of high strength cold rolled steel sheet with resistance ratio and excellent elongation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4885041A (en) * 1987-09-01 1989-12-05 Hoogovens, Groep B.V. Method for the manufacture of formable steel strip
KR100957993B1 (en) * 2002-10-31 2010-05-17 주식회사 포스코 Manufacturing method of high strength cold rolled steel sheet with resistance ratio and excellent elongation

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