JPS56158820A - Manufacture of cold-rolled high-strength steel plate with high yield ratio and much less sliver for press working - Google Patents

Manufacture of cold-rolled high-strength steel plate with high yield ratio and much less sliver for press working

Info

Publication number
JPS56158820A
JPS56158820A JP34081A JP34081A JPS56158820A JP S56158820 A JPS56158820 A JP S56158820A JP 34081 A JP34081 A JP 34081A JP 34081 A JP34081 A JP 34081A JP S56158820 A JPS56158820 A JP S56158820A
Authority
JP
Japan
Prior art keywords
content
steel
temp
steel plate
yield ratio
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
JP34081A
Other languages
Japanese (ja)
Other versions
JPS619364B2 (en
Inventor
Hiroshi Takechi
Hiroaki Masui
Noriyuki Iida
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
Nippon 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP34081A priority Critical patent/JPS56158820A/en
Publication of JPS56158820A publication Critical patent/JPS56158820A/en
Publication of JPS619364B2 publication Critical patent/JPS619364B2/ja
Granted 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

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 the titled cold rolled plate by adding a specified small amount of Ti to steel having a specified high Mn content, controlling the C content to a specified low level at the time of blowing out after refining in a converter, and restricting the ratio between P% and S% of the steel to a specified value. CONSTITUTION:Steel is refined in a converter and discharged so as to adjust the C content to 0.03-0.08wt% at the time of blowing out. This steel contg., by wt., 0.03-0.09% C, 0.02-0.12% Ti, 1.8-2.5% Mn, 0.005-0.2% Al, 0.001-0.02% N, 0.01-0.025% P, <0.01% S (P%/S%>=1.3), <0.5% Si and <0.02% O as principal components is hot rolled at >1,200 deg.C slab heating temp., >870 deg.C hot rolling finish temp. and <650 deg.C hot coiling temp. and cold rolled at 30-80% reduction ratio. Recrystallization annealing is then carried out at 830-900 deg.C annealing temp. to obtain a steel plate having 10-70ppm acid-insoluble N content, 0.01-0.09% acidinsoluble Ti content, 50-90kg/mm<2> tensile strength and >0.7 yield ratio.
JP34081A 1981-01-07 1981-01-07 Manufacture of cold-rolled high-strength steel plate with high yield ratio and much less sliver for press working Granted JPS56158820A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34081A JPS56158820A (en) 1981-01-07 1981-01-07 Manufacture of cold-rolled high-strength steel plate with high yield ratio and much less sliver for press working

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34081A JPS56158820A (en) 1981-01-07 1981-01-07 Manufacture of cold-rolled high-strength steel plate with high yield ratio and much less sliver for press working

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP1382375A Division JPS5188420A (en) 1975-02-01 1975-02-01 Suribaakizuno ichijirushikusukunaipuresuyokokofukuhikochoryokunetsuenkohan oyobi reienkohannoseizohoho

Publications (2)

Publication Number Publication Date
JPS56158820A true JPS56158820A (en) 1981-12-07
JPS619364B2 JPS619364B2 (en) 1986-03-22

Family

ID=11471141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34081A Granted JPS56158820A (en) 1981-01-07 1981-01-07 Manufacture of cold-rolled high-strength steel plate with high yield ratio and much less sliver for press working

Country Status (1)

Country Link
JP (1) JPS56158820A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6077956A (en) * 1983-10-05 1985-05-02 Kawasaki Steel Corp High tensile strength cold-rolled steel plate having above 50kgf/mm2 strength with superior bending characteristic and stretch-flange formability and production of said steel plate
JPS63145754A (en) * 1986-12-10 1988-06-17 Ngk Spark Plug Co Ltd Metallic fitting for ignition plug body and its production
JPS63266046A (en) * 1986-12-10 1988-11-02 Ngk Spark Plug Co Ltd Steel for metallic fixture of essentially spark plug use and its production
JP2014118592A (en) * 2012-12-14 2014-06-30 Nippon Steel & Sumitomo Metal Hot rolled steel sheet excellent in surface quality, having small anisotropic property and good in shape after cutting and its manufacturing method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6077956A (en) * 1983-10-05 1985-05-02 Kawasaki Steel Corp High tensile strength cold-rolled steel plate having above 50kgf/mm2 strength with superior bending characteristic and stretch-flange formability and production of said steel plate
JPH0477049B2 (en) * 1983-10-05 1992-12-07 Kawasaki Steel Co
JPS63145754A (en) * 1986-12-10 1988-06-17 Ngk Spark Plug Co Ltd Metallic fitting for ignition plug body and its production
JPS63266046A (en) * 1986-12-10 1988-11-02 Ngk Spark Plug Co Ltd Steel for metallic fixture of essentially spark plug use and its production
JPH0525942B2 (en) * 1986-12-10 1993-04-14 Kobe Seikosho Kk
JP2014118592A (en) * 2012-12-14 2014-06-30 Nippon Steel & Sumitomo Metal Hot rolled steel sheet excellent in surface quality, having small anisotropic property and good in shape after cutting and its manufacturing method

Also Published As

Publication number Publication date
JPS619364B2 (en) 1986-03-22

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