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JPS56108830A - Manufacture of hot rolled, high tensile strength galvanized steel sheet of low yield ratio - Google Patents

Manufacture of hot rolled, high tensile strength galvanized steel sheet of low yield ratio

Info

Publication number
JPS56108830A
JPS56108830A JP1143780A JP1143780A JPS56108830A JP S56108830 A JPS56108830 A JP S56108830A JP 1143780 A JP1143780 A JP 1143780A JP 1143780 A JP1143780 A JP 1143780A JP S56108830 A JPS56108830 A JP S56108830A
Authority
JP
Japan
Prior art keywords
steel sheet
hot rolled
hot
yield ratio
manufacture
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
JP1143780A
Other languages
Japanese (ja)
Inventor
Arihiko Morita
Norio Tsukiji
Hisao Imatomi
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 Nisshin Co Ltd
Original Assignee
Nisshin Steel Co 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 Nisshin Steel Co Ltd filed Critical Nisshin Steel Co Ltd
Priority to JP1143780A priority Critical patent/JPS56108830A/en
Publication of JPS56108830A publication Critical patent/JPS56108830A/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

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)
  • Coating With Molten Metal (AREA)

Abstract

PURPOSE:To reduce the yield ratio of steel sheet, and to improve the workability of the steel sheet, by hot rolling steel slab having specific composition including C, Mn, Si, Cr, Al, by box annealing the steel sheet at a specific temp., and by galvanizing the steel sheet. CONSTITUTION:Steel slab consisting in wt% of 0.02-0.15 C, 2-3 Mn, <=0.8 Si, 0.1-1 Cr, 0.01-0.1 Al, the balance being Fe and inevitable impurities, is hot rolled. Said hot rolled steel sheet is box annealed at a temp. not lower than the A1 transformation temp. and not higher than the A3 transformation temp., then it is galvanized. Said steel sheet galvanized by hot dipping may be alloyed by a continuous line succeeding to the galvanizing, or may be hot dip galvanized by flux hot dipping galvanizing method.
JP1143780A 1980-02-04 1980-02-04 Manufacture of hot rolled, high tensile strength galvanized steel sheet of low yield ratio Pending JPS56108830A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1143780A JPS56108830A (en) 1980-02-04 1980-02-04 Manufacture of hot rolled, high tensile strength galvanized steel sheet of low yield ratio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1143780A JPS56108830A (en) 1980-02-04 1980-02-04 Manufacture of hot rolled, high tensile strength galvanized steel sheet of low yield ratio

Publications (1)

Publication Number Publication Date
JPS56108830A true JPS56108830A (en) 1981-08-28

Family

ID=11778060

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1143780A Pending JPS56108830A (en) 1980-02-04 1980-02-04 Manufacture of hot rolled, high tensile strength galvanized steel sheet of low yield ratio

Country Status (1)

Country Link
JP (1) JPS56108830A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61177378A (en) * 1985-02-01 1986-08-09 Nippon Steel Corp Chromate-treated coated Cr-containing steel sheet with excellent painting performance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61177378A (en) * 1985-02-01 1986-08-09 Nippon Steel Corp Chromate-treated coated Cr-containing steel sheet with excellent painting performance

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