JPS5591940A - Preparation of high tension cold rolled steel sheet having superior stretching property - Google Patents

Preparation of high tension cold rolled steel sheet having superior stretching property

Info

Publication number
JPS5591940A
JPS5591940A JP16360978A JP16360978A JPS5591940A JP S5591940 A JPS5591940 A JP S5591940A JP 16360978 A JP16360978 A JP 16360978A JP 16360978 A JP16360978 A JP 16360978A JP S5591940 A JPS5591940 A JP S5591940A
Authority
JP
Japan
Prior art keywords
steel sheet
rolled steel
carrying
high tension
cold rolled
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
JP16360978A
Other languages
Japanese (ja)
Other versions
JPS5830931B2 (en
Inventor
Masashi Hasegawa
Takashi Matsukura
Masayuki Imada
Tomoyoshi Iwao
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 JP16360978A priority Critical patent/JPS5830931B2/en
Publication of JPS5591940A publication Critical patent/JPS5591940A/en
Publication of JPS5830931B2 publication Critical patent/JPS5830931B2/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
    • 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 manufacture a high tension cold rolled steel sheet having a superior stretching prperty, by improving the bulging property by reducing C content of steel sheet and reinforcing the in sufficiency of the strength by adding Mn, Si, Cr etc. CONSTITUTION:Sheet material is made by carrying out hot rolling of steel material containing C; 0.06-0.15%, Si; 0.60-1.20%, Mn; 0.50-1.10%, Cr; 0.10-0.30%, sol.Al<0.05%, P<0.02%, S<0.015%, at >850 deg.C and is rolled round at <630 deg.C. Next, steel sheet is made by carrying out cold rolling at reducing ratio of >50%. Recrystallization is carried out by carrying out box annealing at 550-650 deg.C or continuous annealing at a temperature from 700 deg.C to Ac3 transformation point. Development of belt-shaped structure of hot rolled steel strip is repressed by adding a suitable amount of Cr to Si-Mn base steel in the state of maintaining lower limit of C content constant and dispersion of ferrite+pearlite is made uniform. Uniform minute structure is made and bulging property is improved and, strength is also improved.
JP16360978A 1978-12-30 1978-12-30 Manufacturing method of high-strength cold-rolled steel sheet with excellent stretchability Expired JPS5830931B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16360978A JPS5830931B2 (en) 1978-12-30 1978-12-30 Manufacturing method of high-strength cold-rolled steel sheet with excellent stretchability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16360978A JPS5830931B2 (en) 1978-12-30 1978-12-30 Manufacturing method of high-strength cold-rolled steel sheet with excellent stretchability

Publications (2)

Publication Number Publication Date
JPS5591940A true JPS5591940A (en) 1980-07-11
JPS5830931B2 JPS5830931B2 (en) 1983-07-02

Family

ID=15777170

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16360978A Expired JPS5830931B2 (en) 1978-12-30 1978-12-30 Manufacturing method of high-strength cold-rolled steel sheet with excellent stretchability

Country Status (1)

Country Link
JP (1) JPS5830931B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4961793A (en) * 1987-06-26 1990-10-09 Nippon Steel Corporation High-strength cold-rolled steel sheet having high r value and process for manufacturing the same
KR100514788B1 (en) * 2000-12-05 2005-09-14 주식회사 포스코 A method for manufacturing cold rolled steel sheets having superior surface quality
CN103710624A (en) * 2013-12-20 2014-04-09 钢铁研究总院 Low alloy steel used for grounding grid resistant to acid soil corrosion
CN112646958A (en) * 2020-11-30 2021-04-13 中国科学院金属研究所 Heat treatment process of low-alloy high-strength high-weather-resistance structural steel for highway guardrail

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4961793A (en) * 1987-06-26 1990-10-09 Nippon Steel Corporation High-strength cold-rolled steel sheet having high r value and process for manufacturing the same
KR100514788B1 (en) * 2000-12-05 2005-09-14 주식회사 포스코 A method for manufacturing cold rolled steel sheets having superior surface quality
CN103710624A (en) * 2013-12-20 2014-04-09 钢铁研究总院 Low alloy steel used for grounding grid resistant to acid soil corrosion
CN112646958A (en) * 2020-11-30 2021-04-13 中国科学院金属研究所 Heat treatment process of low-alloy high-strength high-weather-resistance structural steel for highway guardrail

Also Published As

Publication number Publication date
JPS5830931B2 (en) 1983-07-02

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