IN2014KN01170A - - Google Patents

Info

Publication number
IN2014KN01170A
IN2014KN01170A IN1170KON2014A IN2014KN01170A IN 2014KN01170 A IN2014KN01170 A IN 2014KN01170A IN 1170KON2014 A IN1170KON2014 A IN 1170KON2014A IN 2014KN01170 A IN2014KN01170 A IN 2014KN01170A
Authority
IN
India
Prior art keywords
ferrite
pearlite
less
steel sheet
volume proportion
Prior art date
Application number
Inventor
Kouichi Nakagawa
Kenji Kawamura
Takeshi Yokota
Kazuhiro Seto
Original Assignee
Jfe 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 Jfe Steel Corp filed Critical Jfe Steel Corp
Publication of IN2014KN01170A publication Critical patent/IN2014KN01170A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • 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
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • 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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0426—Hot rolling
    • 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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
    • C21D8/0463—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment following hot rolling
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/009—Pearlite

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

Provided are a high strength steel sheet which has a tensile strength (TS) of 600 700 MPa an elongation (El) of 25% or higher and a hole expansion ratio (?) of 80% or higher and has excellent formability and a process for producing the steel sheet. The high strength steel sheet has a composition which contains in terms of mass% 0.10 0.18% C 0.5 1.5% excluding 0.5% Si 0.5 1.5% Mn up to 0.05% P up to 0.005% S and up to 0.05% Al with the remainder comprising Fe and unavoidable impurities. The sheet has a microstructure which comprises ferrite and pearlite the volume proportion of the ferrite being 70 97% and the volume proportion of the pearlite being 3% or higher and in which cementite is present at the ferrite grain boundaries in an amount of 2% by volume or less the volume proportion of the phases other than the ferrite pearlite and cementite is less than 3% in total and the ferrite has an average grain diameter of 7 µm or less.
IN1170KON2014 2011-12-19 2012-11-29 IN2014KN01170A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011276997A JP5316634B2 (en) 2011-12-19 2011-12-19 High-strength steel sheet with excellent workability and method for producing the same
PCT/JP2012/007663 WO2013094130A1 (en) 2011-12-19 2012-11-29 High-strength steel sheet and process for producing same

Publications (1)

Publication Number Publication Date
IN2014KN01170A true IN2014KN01170A (en) 2015-10-16

Family

ID=48668049

Family Applications (1)

Application Number Title Priority Date Filing Date
IN1170KON2014 IN2014KN01170A (en) 2011-12-19 2012-11-29

Country Status (7)

Country Link
US (1) US20140332123A1 (en)
EP (1) EP2796584B1 (en)
JP (1) JP5316634B2 (en)
KR (1) KR101624439B1 (en)
CN (1) CN104011240B (en)
IN (1) IN2014KN01170A (en)
WO (1) WO2013094130A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5874376B2 (en) * 2011-12-19 2016-03-02 Ｊｆｅスチール株式会社 High-strength steel sheet with excellent workability and method for producing the same
CN104694854A (en) * 2015-03-20 2015-06-10 苏州科胜仓储物流设备有限公司 High-strength steel plate for cantilever type goods shelves and heat processing process thereof
CN104674138A (en) * 2015-03-20 2015-06-03 苏州科胜仓储物流设备有限公司 Friction-resistant steel plate for narrow path type goods shelf and thermal treatment technology of friction-resistant steel plate
US10858717B2 (en) 2015-08-11 2020-12-08 Jfe Steel Corporation Material for high strength steel sheets, hot rolled material for high strength steel sheets, hot-rolled and annealed material for high strength steel sheets, high strength steel sheet, high strength hot-dip-coated steel sheet, high strength electroplated steel sheet, and method of manufacturing same
JP6179584B2 (en) * 2015-12-22 2017-08-16 Ｊｆｅスチール株式会社 High strength steel plate with excellent bendability and method for producing the same
JP6260676B2 (en) * 2016-03-29 2018-01-17 Ｊｆｅスチール株式会社 Hot press steel plate and method for manufacturing the same, and hot press member and method for manufacturing the same
EP3438316B1 (en) 2016-03-29 2022-03-09 JFE Steel Corporation Steel sheet for hot pressing and production method therefor, and hot press member and production method therefor
CN109423577B (en) * 2017-08-30 2021-01-12 宝山钢铁股份有限公司 High-strength multi-phase steel tinning raw plate and manufacturing method thereof
EP3933055A1 (en) * 2019-02-28 2022-01-05 JFE Steel Corporation Steel sheet, member, and methods for producing same
JP7235621B2 (en) * 2019-08-27 2023-03-08 株式会社神戸製鋼所 Steel plate for low-strength hot stamping, hot stamped parts, and method for manufacturing hot stamped parts
DE102020203564A1 (en) * 2020-03-19 2021-09-23 Sms Group Gmbh Process for producing a rolled multiphase steel strip with special properties
CN116752036A (en) * 2023-05-25 2023-09-15 鞍钢股份有限公司 High-elongation high-flange ultrathin 610 MPa-level steel plate for automobile girder and production method

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JPH0826433B2 (en) * 1992-12-28 1996-03-13 株式会社神戸製鋼所 High strength hot rolled steel sheet with excellent stretch flangeability
JPH09143611A (en) * 1995-11-21 1997-06-03 Nippon Steel Corp Hot rolled high strength steel sheet excellent in formability and fatigue characteristic and having thermal softening resistance
JPH1192855A (en) * 1997-09-22 1999-04-06 Natl Res Inst For Metals Steel having ultrafine double phase structure
JP3039862B1 (en) * 1998-11-10 2000-05-08 川崎製鉄株式会社 Hot-rolled steel sheet for processing with ultra-fine grains
JP3539548B2 (en) * 1999-09-20 2004-07-07 Ｊｆｅスチール株式会社 Manufacturing method of high tensile hot rolled steel sheet for processing
US6537394B1 (en) * 1999-10-22 2003-03-25 Kawasaki Steel Corporation Method for producing hot-dip galvanized steel sheet having high strength and also being excellent in formability and galvanizing property
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Also Published As

Publication number Publication date
EP2796584A4 (en) 2015-10-14
KR101624439B1 (en) 2016-05-25
CN104011240A (en) 2014-08-27
EP2796584B1 (en) 2018-03-07
JP2013127099A (en) 2013-06-27
KR20140100994A (en) 2014-08-18
WO2013094130A1 (en) 2013-06-27
EP2796584A1 (en) 2014-10-29
JP5316634B2 (en) 2013-10-16
CN104011240B (en) 2016-11-23
US20140332123A1 (en) 2014-11-13

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