JPS572840A - Production of high strength low yield ratio high ductility composite structure steel plate of high artificial aging hardness after working - Google Patents

Production of high strength low yield ratio high ductility composite structure steel plate of high artificial aging hardness after working

Info

Publication number
JPS572840A
JPS572840A JP7615980A JP7615980A JPS572840A JP S572840 A JPS572840 A JP S572840A JP 7615980 A JP7615980 A JP 7615980A JP 7615980 A JP7615980 A JP 7615980A JP S572840 A JPS572840 A JP S572840A
Authority
JP
Japan
Prior art keywords
composite structure
working
steel plate
low yield
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.)
Pending
Application number
JP7615980A
Other languages
Japanese (ja)
Inventor
Takashi Furukawa
Mitsunobu Abe
Osamu Akisue
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 JP7615980A priority Critical patent/JPS572840A/en
Publication of JPS572840A publication Critical patent/JPS572840A/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, low yield ratio, and high ductility having composite structure of high artificial aging hardness after working by rolling the steel of the specific composition, coiling the same and holding the same at a specific temp., for a short time then cooling it under a specific condition. CONSTITUTION:The steel consisting essentially of 0.01-0.12% C, <=1.2% Si, and 0.7-2.0% Mn is hot-rolled, finished and coiled. This steel is heated up to 730- 900 deg.C at >=5 deg.C/second average heating rate as hot-rolled or after it is cold-rolled, thence it is held for a short time for 0-60 seconds. Thereafter, it is cooled down to <=200 deg.C at 5-500 deg.C/second average cooling rates, whereby it is made into the composite structure of which the main structure constituting elements are a ferrite phase and a quench transformation phase. By this method, the high strength low yield ratio high ductility composite structure steel plate which is of >=35kg/mm.<2> tensile strength, is high in artificial aging hardness after working suitable for automobiles and the like is obtained.
JP7615980A 1980-06-06 1980-06-06 Production of high strength low yield ratio high ductility composite structure steel plate of high artificial aging hardness after working Pending JPS572840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7615980A JPS572840A (en) 1980-06-06 1980-06-06 Production of high strength low yield ratio high ductility composite structure steel plate of high artificial aging hardness after working

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7615980A JPS572840A (en) 1980-06-06 1980-06-06 Production of high strength low yield ratio high ductility composite structure steel plate of high artificial aging hardness after working

Publications (1)

Publication Number Publication Date
JPS572840A true JPS572840A (en) 1982-01-08

Family

ID=13597266

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7615980A Pending JPS572840A (en) 1980-06-06 1980-06-06 Production of high strength low yield ratio high ductility composite structure steel plate of high artificial aging hardness after working

Country Status (1)

Country Link
JP (1) JPS572840A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6855218B1 (en) * 1999-03-13 2005-02-15 Thyssen Krupp Stahl Ag Method for producing a hot-rolled strip
CN110964892A (en) * 2018-09-27 2020-04-07 西门子股份公司 Method for balancing strength and ductility of metal material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6855218B1 (en) * 1999-03-13 2005-02-15 Thyssen Krupp Stahl Ag Method for producing a hot-rolled strip
CN110964892A (en) * 2018-09-27 2020-04-07 西门子股份公司 Method for balancing strength and ductility of metal material

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