JPS5531123A - Manufacture of hot rolled steel plate of composite structure having superior corrosion resistance, low yield ratio and high strength - Google Patents

Manufacture of hot rolled steel plate of composite structure having superior corrosion resistance, low yield ratio and high strength

Info

Publication number
JPS5531123A
JPS5531123A JP10294078A JP10294078A JPS5531123A JP S5531123 A JPS5531123 A JP S5531123A JP 10294078 A JP10294078 A JP 10294078A JP 10294078 A JP10294078 A JP 10294078A JP S5531123 A JPS5531123 A JP S5531123A
Authority
JP
Japan
Prior art keywords
steel plate
manufacture
corrosion resistance
composite structure
low yield
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
JP10294078A
Other languages
Japanese (ja)
Inventor
Satoshi Furukawa
Haruo Shimada
Yoshiaki Sakakibara
Michio Endo
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 JP10294078A priority Critical patent/JPS5531123A/en
Publication of JPS5531123A publication Critical patent/JPS5531123A/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)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

PURPOSE:To manufacture the title steel plate by finishing hot rolling of steel contg. a specified amt. of C and Mn at a temp. in the ferrite+austenite two phase coexisting zone followed by immediate quenching. CONSTITUTION:Hot rolling of steel contg. C 0.03-0.10%, Mn 1.0-1.7%, Ni 0.03-0.20%, Si<1.0%, Cu 0.1-0.35%, P 0.01-0.15%, S<0.03% and Al< 0.10% is finished at 720-800 deg.C. In this temp. range two phases of ferrite and austenite coexist in case of the above C and Mn contents. The hot rolled steel is immediately quenched to below 250 deg.C to form a composite structure consisting of ferrite phase and quench-transformed phase of martensite and bainite or the like. Thus, a car steel plate is manufactured having a low yield ratio below 0.6, a high tensile strength above 40kg/mm<2> and superior corrosion resistance.
JP10294078A 1978-08-25 1978-08-25 Manufacture of hot rolled steel plate of composite structure having superior corrosion resistance, low yield ratio and high strength Pending JPS5531123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10294078A JPS5531123A (en) 1978-08-25 1978-08-25 Manufacture of hot rolled steel plate of composite structure having superior corrosion resistance, low yield ratio and high strength

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10294078A JPS5531123A (en) 1978-08-25 1978-08-25 Manufacture of hot rolled steel plate of composite structure having superior corrosion resistance, low yield ratio and high strength

Publications (1)

Publication Number Publication Date
JPS5531123A true JPS5531123A (en) 1980-03-05

Family

ID=14340823

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10294078A Pending JPS5531123A (en) 1978-08-25 1978-08-25 Manufacture of hot rolled steel plate of composite structure having superior corrosion resistance, low yield ratio and high strength

Country Status (1)

Country Link
JP (1) JPS5531123A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4314862A (en) * 1979-10-16 1982-02-09 Kobe Steel, Ltd. Dual phase high strength cold-rolled steel plate
JPS6092448A (en) * 1983-10-27 1985-05-24 Sumitomo Metal Ind Ltd Iron-reinforcing rod for concrete with superior corrosion resistance
US4561910A (en) * 1981-02-20 1985-12-31 Kawasaki Steel Corporation Dual phase-structured hot rolled high-tensile strength steel sheet and a method of producing the same
CN105220065A (en) * 2015-10-16 2016-01-06 宝山钢铁股份有限公司 A kind of high hole expansibility low yield strength ratio hot-rolled high-strength steel plate and manufacture method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4314862A (en) * 1979-10-16 1982-02-09 Kobe Steel, Ltd. Dual phase high strength cold-rolled steel plate
US4561910A (en) * 1981-02-20 1985-12-31 Kawasaki Steel Corporation Dual phase-structured hot rolled high-tensile strength steel sheet and a method of producing the same
JPS6092448A (en) * 1983-10-27 1985-05-24 Sumitomo Metal Ind Ltd Iron-reinforcing rod for concrete with superior corrosion resistance
JPH0536489B2 (en) * 1983-10-27 1993-05-31 Sumitomo Metal Ind
CN105220065A (en) * 2015-10-16 2016-01-06 宝山钢铁股份有限公司 A kind of high hole expansibility low yield strength ratio hot-rolled high-strength steel plate and manufacture method thereof
CN105220065B (en) * 2015-10-16 2017-08-25 宝山钢铁股份有限公司 A kind of high hole expansibility low yield strength ratio hot-rolled high-strength steel plate and its manufacture method

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