JPS5675520A - Manufacture of high yield ratio type nonskin-pass hot rolled high tensile steel plate - Google Patents

Manufacture of high yield ratio type nonskin-pass hot rolled high tensile steel plate

Info

Publication number
JPS5675520A
JPS5675520A JP15123679A JP15123679A JPS5675520A JP S5675520 A JPS5675520 A JP S5675520A JP 15123679 A JP15123679 A JP 15123679A JP 15123679 A JP15123679 A JP 15123679A JP S5675520 A JPS5675520 A JP S5675520A
Authority
JP
Japan
Prior art keywords
steel plate
hot rolled
nonskin
manufacture
high 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
JP15123679A
Other languages
Japanese (ja)
Inventor
Jiro Jizaimaru
Yasuo Takahashi
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 JP15123679A priority Critical patent/JPS5675520A/en
Publication of JPS5675520A publication Critical patent/JPS5675520A/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

Abstract

PURPOSE:To obtain a steel plate of high strength and high yield ration excellent in machinability and cold toughness by heating and hot rolling steel composed of specified components such as C, Si etc. and taking up at a specified temperature and, at the same time, cooling at a specified cooling speed. CONSTITUTION:Steel composed of 0.01-0.08% C, 0.1-1% Si, 1.5-2.2% Mn, 0.2-0.6% Cr, 0.05-0.2% Ti, <=0.05% acid soluble Al, <=0.001% S, <=0.01% Ni, the rest iron and impurities is heated to >=1,200 deg.C and hot rolled at a finishing temperature of >=880 deg.C and taken up at 450-600 deg.C, making the average cooling speed from the hot rolling finishing temperature to taking up speed >=8 deg.C/sec. By this way, a seel plate of the type given in the titled which is suitable for construction machines, automobiles etc. can be obtained inexpensively. The cold toughness is raised and material quality is stabilized by adding a total of 0.005-0.01% of Ca or one or two of rare earth elements to said composition.
JP15123679A 1979-11-20 1979-11-20 Manufacture of high yield ratio type nonskin-pass hot rolled high tensile steel plate Pending JPS5675520A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15123679A JPS5675520A (en) 1979-11-20 1979-11-20 Manufacture of high yield ratio type nonskin-pass hot rolled high tensile steel plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15123679A JPS5675520A (en) 1979-11-20 1979-11-20 Manufacture of high yield ratio type nonskin-pass hot rolled high tensile steel plate

Publications (1)

Publication Number Publication Date
JPS5675520A true JPS5675520A (en) 1981-06-22

Family

ID=15514218

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15123679A Pending JPS5675520A (en) 1979-11-20 1979-11-20 Manufacture of high yield ratio type nonskin-pass hot rolled high tensile steel plate

Country Status (1)

Country Link
JP (1) JPS5675520A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5855528A (en) * 1981-09-29 1983-04-01 Kawasaki Steel Corp Preparation of hot-rolled steel sheet having excellent acid-pickling property and workability
JPS58185719A (en) * 1982-04-20 1983-10-29 Kobe Steel Ltd Manufacture of high yield ratio type unnormalized hot-rolled high-tension steel plate
JPS591632A (en) * 1982-06-28 1984-01-07 Sumitomo Metal Ind Ltd Manufacture of hot-rolled high-tension steel sheet with superior workability
JPH06240356A (en) * 1993-02-10 1994-08-30 Sumitomo Metal Ind Ltd Production of high strength hot rolled steel plate excellent in workability

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5855528A (en) * 1981-09-29 1983-04-01 Kawasaki Steel Corp Preparation of hot-rolled steel sheet having excellent acid-pickling property and workability
JPH0229724B2 (en) * 1981-09-29 1990-07-02 Kawasaki Steel Co
JPS58185719A (en) * 1982-04-20 1983-10-29 Kobe Steel Ltd Manufacture of high yield ratio type unnormalized hot-rolled high-tension steel plate
JPS591632A (en) * 1982-06-28 1984-01-07 Sumitomo Metal Ind Ltd Manufacture of hot-rolled high-tension steel sheet with superior workability
JPS624450B2 (en) * 1982-06-28 1987-01-30 Sumitomo Metal Ind
JPH06240356A (en) * 1993-02-10 1994-08-30 Sumitomo Metal Ind Ltd Production of high strength hot rolled steel plate excellent in workability

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