JPS56146822A - Production of extra mild hot rolled steel sheet - Google Patents

Production of extra mild hot rolled steel sheet

Info

Publication number
JPS56146822A
JPS56146822A JP4814180A JP4814180A JPS56146822A JP S56146822 A JPS56146822 A JP S56146822A JP 4814180 A JP4814180 A JP 4814180A JP 4814180 A JP4814180 A JP 4814180A JP S56146822 A JPS56146822 A JP S56146822A
Authority
JP
Japan
Prior art keywords
temp
rolling
steel sheet
steel
hot 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.)
Pending
Application number
JP4814180A
Other languages
Japanese (ja)
Inventor
Kunio Watanabe
Toyohiko Sato
Masaki Nagao
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 JP4814180A priority Critical patent/JPS56146822A/en
Publication of JPS56146822A publication Critical patent/JPS56146822A/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
    • 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)
  • Metal Rolling (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

PURPOSE:To produce an extra mild hot rolled-steel sheet with less heat consumption by continuously cating the steel which consists of specific composition and of which the relation between C and Mn in particular is set, and finish rolling the same at temp. above the Ar3 transformation point proportional to B addition amount at the reheating rolling. CONSTITUTION:The steel consisting of <=0.10% C, <=0.50% Mn, <=0.10% Si, <=0.020% P, <=0.020% S, 5-50ppm B and the balance iron with unavoidable impurities where C+1/6Mn <=0.14% is continuously cast. In hot rolling this high- temp. ingot directly or after heat retaining and light heating, the finish rolling is finished at temp. above the Ar3 transformation point lowring in proportion to the B contents in the steel. Since temp. conditions are eased by this method, the rolling is easy and the steel sheet making use of the superior characteritics of B such as softening and aging characteristic is obtained.
JP4814180A 1980-04-14 1980-04-14 Production of extra mild hot rolled steel sheet Pending JPS56146822A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4814180A JPS56146822A (en) 1980-04-14 1980-04-14 Production of extra mild hot rolled steel sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4814180A JPS56146822A (en) 1980-04-14 1980-04-14 Production of extra mild hot rolled steel sheet

Publications (1)

Publication Number Publication Date
JPS56146822A true JPS56146822A (en) 1981-11-14

Family

ID=12795061

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4814180A Pending JPS56146822A (en) 1980-04-14 1980-04-14 Production of extra mild hot rolled steel sheet

Country Status (1)

Country Link
JP (1) JPS56146822A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6376822A (en) * 1986-09-18 1988-04-07 Kobe Steel Ltd Production of hot rolled mild steel sheet having excellent press formability
JPS63143225A (en) * 1986-12-04 1988-06-15 Sumitomo Metal Ind Ltd Manufacture of hot rolled steel sheet having superior workability
KR20010083963A (en) * 1999-12-30 2001-09-06 이구택 a method of manufacturing a low-carbon hot-rolled steel sheet with good quality

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6376822A (en) * 1986-09-18 1988-04-07 Kobe Steel Ltd Production of hot rolled mild steel sheet having excellent press formability
JPS63143225A (en) * 1986-12-04 1988-06-15 Sumitomo Metal Ind Ltd Manufacture of hot rolled steel sheet having superior workability
JPH0541687B2 (en) * 1986-12-04 1993-06-24 Sumitomo Metal Ind
KR20010083963A (en) * 1999-12-30 2001-09-06 이구택 a method of manufacturing a low-carbon hot-rolled steel sheet with good quality

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