JPS56119737A - Manufacture of hot rolled high tensile steel plate with low yield ratio - Google Patents

Manufacture of hot rolled high tensile steel plate with low yield ratio

Info

Publication number
JPS56119737A
JPS56119737A JP2430180A JP2430180A JPS56119737A JP S56119737 A JPS56119737 A JP S56119737A JP 2430180 A JP2430180 A JP 2430180A JP 2430180 A JP2430180 A JP 2430180A JP S56119737 A JPS56119737 A JP S56119737A
Authority
JP
Japan
Prior art keywords
coiling
hot rolled
manufacture
temp
steel plate
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.)
Granted
Application number
JP2430180A
Other languages
Japanese (ja)
Other versions
JPS595651B2 (en
Inventor
Jiro Jizaimaru
Hidenori Shirasawa
Kazuo Miotani
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 JP55024301A priority Critical patent/JPS595651B2/en
Publication of JPS56119737A publication Critical patent/JPS56119737A/en
Publication of JPS595651B2 publication Critical patent/JPS595651B2/en
Expired 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 Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

PURPOSE:To obtain supeior formability and strength by cooling steel products contg. a specified amount of C, Si, Mn, Cr, Nb, Ti and V from hot rolling to coiling at a specified cooling rate and setting the coiling temp. to a specified temp. range. CONSTITUTION:One or more among 0.01-0.1wt% Nb, 0.02-0.15wt% Ti and 0.02-0.15wt% V are added to a steel contg., by wt., 0.03-0.1% C, 0.5-2% Si, 0.5-2% Mn and 0.5-2.5% Cr while satisfying equation 8<=(Si+Mn+Cr)<=4.5. This steel is hot rolled and cooled. The cooling rate from the end of the finish rolling to coiling is adjusted to 4-50 deg.C/sec, and the coiling temp. is set to 400-650 deg.C. Thus, a composite structure consisting of ferrite and a low temp. deformation product is formed after the hot rolling.
JP55024301A 1980-02-27 1980-02-27 Manufacturing method for low yield ratio hot-rolled high-strength steel sheets Expired JPS595651B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55024301A JPS595651B2 (en) 1980-02-27 1980-02-27 Manufacturing method for low yield ratio hot-rolled high-strength steel sheets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55024301A JPS595651B2 (en) 1980-02-27 1980-02-27 Manufacturing method for low yield ratio hot-rolled high-strength steel sheets

Publications (2)

Publication Number Publication Date
JPS56119737A true JPS56119737A (en) 1981-09-19
JPS595651B2 JPS595651B2 (en) 1984-02-06

Family

ID=12134344

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55024301A Expired JPS595651B2 (en) 1980-02-27 1980-02-27 Manufacturing method for low yield ratio hot-rolled high-strength steel sheets

Country Status (1)

Country Link
JP (1) JPS595651B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58185719A (en) * 1982-04-20 1983-10-29 Kobe Steel Ltd Manufacture of high yield ratio type unnormalized hot-rolled high-tension steel plate

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6178927A (en) * 1984-09-26 1986-04-22 Eiji Adachi Construction of retaining wall

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58185719A (en) * 1982-04-20 1983-10-29 Kobe Steel Ltd Manufacture of high yield ratio type unnormalized hot-rolled high-tension steel plate

Also Published As

Publication number Publication date
JPS595651B2 (en) 1984-02-06

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