EP1365037A4 - High strength steel sheet having excellent formability and method for production thereof - Google Patents

High strength steel sheet having excellent formability and method for production thereof

Info

Publication number
EP1365037A4
EP1365037A4 EP02710418A EP02710418A EP1365037A4 EP 1365037 A4 EP1365037 A4 EP 1365037A4 EP 02710418 A EP02710418 A EP 02710418A EP 02710418 A EP02710418 A EP 02710418A EP 1365037 A4 EP1365037 A4 EP 1365037A4
Authority
EP
European Patent Office
Prior art keywords
production
steel sheet
high strength
strength steel
excellent formability
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.)
Granted
Application number
EP02710418A
Other languages
German (de)
French (fr)
Other versions
EP1365037A1 (en
EP1365037B1 (en
Inventor
Takahiro Kashima
Shunichi Hashimoto
Shushi Ikeda
Hiroshi Akamizu
Koh-Ichi Sugimoto
Akihiko Nagasaka
Akinobu Kanda
Ryo Kikuchi
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
Priority claimed from JP2001264175A external-priority patent/JP2003073773A/en
Priority claimed from JP2001300502A external-priority patent/JP4188581B2/en
Priority claimed from JP2001300503A external-priority patent/JP4188582B2/en
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Publication of EP1365037A1 publication Critical patent/EP1365037A1/en
Publication of EP1365037A4 publication Critical patent/EP1365037A4/en
Application granted granted Critical
Publication of EP1365037B1 publication Critical patent/EP1365037B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/22—Martempering
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0273—Final recrystallisation annealing
    • 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
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • C23C2/0224—Two or more thermal pretreatments
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/185—Hardening; Quenching with or without subsequent tempering from an intercritical temperature
    • 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
    • C21D2211/002—Bainite
    • 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
    • C21D2211/008—Martensite

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
EP02710418A 2001-01-31 2002-01-31 High strength steel sheet having excellent formability and method for production thereof Expired - Lifetime EP1365037B1 (en)

Applications Claiming Priority (20)

Application Number Priority Date Filing Date Title
JP2001023402 2001-01-31
JP2001002340 2001-01-31
JP2001023401 2001-01-31
JP2001003433 2001-02-09
JP2001034335 2001-02-09
JP2001034336 2001-02-09
JP2001055639 2001-02-28
JP2001005564 2001-02-28
JP2001055641 2001-02-28
JP2001055640 2001-02-28
JP2001005563 2001-02-28
JP2001055642 2001-02-28
JP2001264175A JP2003073773A (en) 2001-08-31 2001-08-31 High-strength steel sheet superior in workability and fatigue characteristic, and manufacturing method therefor
JP2001002641 2001-08-31
JP2001300502A JP4188581B2 (en) 2001-01-31 2001-09-28 High-strength steel sheet with excellent workability and method for producing the same
JP2001300503A JP4188582B2 (en) 2001-02-09 2001-09-28 High-strength steel sheet with excellent workability and method for producing the same
JP2001003005 2001-09-28
JP2001300504 2001-09-28
JP2001300505 2001-09-28
PCT/JP2002/000744 WO2002061161A1 (en) 2001-01-31 2002-01-31 High strength steel sheet having excellent formability and method for production thereof

Publications (3)

Publication Number Publication Date
EP1365037A1 EP1365037A1 (en) 2003-11-26
EP1365037A4 true EP1365037A4 (en) 2005-02-02
EP1365037B1 EP1365037B1 (en) 2008-04-02

Family

ID=27584373

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02710418A Expired - Lifetime EP1365037B1 (en) 2001-01-31 2002-01-31 High strength steel sheet having excellent formability and method for production thereof

Country Status (2)

Country Link
EP (1) EP1365037B1 (en)
WO (1) WO2002061161A1 (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7314532B2 (en) 2003-03-26 2008-01-01 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) High-strength forged parts having high reduction of area and method for producing same
EP1559798B1 (en) * 2004-01-28 2016-11-02 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) High strength and low yield ratio cold rolled steel sheet and method of manufacturing the same
CN101351570B (en) 2005-12-28 2013-01-30 株式会社神户制钢所 Ultrahigh-strength thin steel sheet
EP2465961B1 (en) * 2006-07-14 2013-12-04 Kabushiki Kaisha Kobe Seiko Sho High-strength steel sheets and processes for production of the same
JP5223360B2 (en) * 2007-03-22 2013-06-26 Ｊｆｅスチール株式会社 High-strength hot-dip galvanized steel sheet with excellent formability and method for producing the same
CA2697226C (en) * 2007-10-25 2015-12-15 Jfe Steel Corporation High tensile strength galvanized steel sheet excellent in formability and method for manufacturing the same
JP5369663B2 (en) * 2008-01-31 2013-12-18 Ｊｆｅスチール株式会社 High-strength hot-dip galvanized steel sheet excellent in workability and manufacturing method thereof
JP5418047B2 (en) * 2008-09-10 2014-02-19 Ｊｆｅスチール株式会社 High strength steel plate and manufacturing method thereof
JP5323563B2 (en) * 2009-03-31 2013-10-23 株式会社神戸製鋼所 High-strength cold-rolled steel sheet with excellent workability and shape freezeability
CN102337480B (en) * 2010-07-15 2013-03-13 宝山钢铁股份有限公司 Ultra-high strength steel plate with excellent environmental embrittlement resistance and fatigue resistance, and manufacturing method thereof
KR101253885B1 (en) * 2010-12-27 2013-04-16 주식회사 포스코 Steel sheet fir formed member, formed member having excellent ductility and method for manufacturing the same
WO2013161831A1 (en) * 2012-04-23 2013-10-31 株式会社神戸製鋼所 Method for producing galvanized steel sheet for hot stamping, alloyed hot-dipped galvanized steel sheet for hot stamping and method for producing same, and hot stamped component
US10253389B2 (en) 2014-03-31 2019-04-09 Jfe Steel Corporation High-yield-ratio, high-strength cold-rolled steel sheet and production method therefor
WO2015177582A1 (en) 2014-05-20 2015-11-26 Arcelormittal Investigación Y Desarrollo Sl Double-annealed steel sheet having high mechanical strength and ductility characteristics, method of manufacture and use of such sheets
MX2016016159A (en) 2014-07-14 2017-03-08 Nippon Steel & Sumitomo Metal Corp Hot-rolled steel sheet.
CN104513927B (en) 2014-12-19 2017-04-05 宝山钢铁股份有限公司 A kind of tensile strength 800MPa grade high-strength high-tenacity steel plate and its manufacture method
JP6559886B2 (en) * 2015-09-22 2019-08-14 ヒュンダイ スチール カンパニー Plated steel sheet and manufacturing method thereof
WO2017109540A1 (en) 2015-12-21 2017-06-29 Arcelormittal Method for producing a high strength steel sheet having improved ductility and formability, and obtained steel sheet
US11993823B2 (en) 2016-05-10 2024-05-28 United States Steel Corporation High strength annealed steel products and annealing processes for making the same
US11560606B2 (en) 2016-05-10 2023-01-24 United States Steel Corporation Methods of producing continuously cast hot rolled high strength steel sheet products
RU2749413C2 (en) 2016-05-10 2021-06-09 Юнайтид Стейтс Стил Корпорэйшн High-strength steel products and their manufacturing methods
US11661642B2 (en) 2018-03-30 2023-05-30 Jfe Steel Corporation High-strength steel sheet and method for manufacturing same
WO2019188643A1 (en) 2018-03-30 2019-10-03 Ｊｆｅスチール株式会社 High-strength steel sheet and production method thereof
CN111936658B (en) 2018-03-30 2021-11-02 杰富意钢铁株式会社 High-strength steel sheet and method for producing same
WO2020245627A1 (en) * 2019-06-03 2020-12-10 Arcelormittal Cold rolled and coated steel sheet and a method of manufacturing thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881306A1 (en) * 1997-05-12 1998-12-02 RECHERCHE ET DEVELOPPEMENT DU GROUPE COCKERILL SAMBRE, en abrégé: RD-CS Ductile steel with high yield strength and process for manufacturing same
JPH11350064A (en) * 1998-06-08 1999-12-21 Kobe Steel Ltd High strength steel sheet excellent in shape fixability and impact resistance and its production
EP0997548A1 (en) * 1998-03-12 2000-05-03 Kabushiki Kaisha Kobe Seiko Sho High strength hot rolled steel sheet excellent in formability
JP2001003150A (en) * 1999-04-21 2001-01-09 Kawasaki Steel Corp High tensile strength hot dip galvanized steel sheet excellent in ductility and its production
EP1072689A1 (en) * 1999-07-30 2001-01-31 Usinor Process of manufacturing thin "TRIP" type steel strips and strips obtained thereby

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06108152A (en) * 1992-09-30 1994-04-19 Kobe Steel Ltd Production of high strength hot-dipping galvanized steel sheet excellent in bending workability
JPH07252592A (en) * 1994-03-15 1995-10-03 Nippon Steel Corp Hot rolled high strength steel sheet excellent in formability, low temperature toughness and fatigue property
JP3374644B2 (en) * 1996-03-28 2003-02-10 株式会社神戸製鋼所 High-strength hot-rolled steel sheet, high-strength galvanized steel sheet excellent in pitting corrosion resistance and workability, and methods for producing them
JP2000144311A (en) * 1998-11-13 2000-05-26 Sumitomo Metal Ind Ltd High carbon thin steel sheet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881306A1 (en) * 1997-05-12 1998-12-02 RECHERCHE ET DEVELOPPEMENT DU GROUPE COCKERILL SAMBRE, en abrégé: RD-CS Ductile steel with high yield strength and process for manufacturing same
EP0997548A1 (en) * 1998-03-12 2000-05-03 Kabushiki Kaisha Kobe Seiko Sho High strength hot rolled steel sheet excellent in formability
JPH11350064A (en) * 1998-06-08 1999-12-21 Kobe Steel Ltd High strength steel sheet excellent in shape fixability and impact resistance and its production
JP2001003150A (en) * 1999-04-21 2001-01-09 Kawasaki Steel Corp High tensile strength hot dip galvanized steel sheet excellent in ductility and its production
EP1072689A1 (en) * 1999-07-30 2001-01-31 Usinor Process of manufacturing thin "TRIP" type steel strips and strips obtained thereby

Non-Patent Citations (9)

* Cited by examiner, † Cited by third party
Title
BASUKI A ET AL: "Effect of deformation in the intercritical area on the grain refinement of retained austenite of 0.4C trip steel", April 1999, SCRIPTA MATERIALIA, ELSEVIER, NEW YORK, NY, US, PAGE(S) 1003-1008, ISSN: 1359-6462, XP004325627 *
PATENT ABSTRACTS OF JAPAN vol. 0183, no. 92 (C - 1228) 22 July 1994 (1994-07-22) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 02 29 February 1996 (1996-02-29) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 02 30 January 1998 (1998-01-30) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 03 30 March 2000 (2000-03-30) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 16 8 May 2001 (2001-05-08) *
SUGIMOTO K ET AL: "STRETCH-FLANGEABILITY OF A HIGH-STRENGTH TRIP TYPE BAINITIC SHEET STEEL", ISIJ INTERNATIONAL, IRON AND STEEL INSTITUTE OF JAPAN, TOKYO,, JP, vol. 40, no. 9, 2000, pages 920 - 926, XP001182010, ISSN: 0915-1559 *
SUGIMOTO S ET AL: "EFFECTS OF RETAINED AUSTENITE PARAMETERS ON WARM STRETCH-FLANGEABILITY IN TRIP-AIDED DUAL-PHASE SHEET STEELS", ISIJ INTERNATIONAL, IRON AND STEEL INSTITUTE OF JAPAN, TOKYO,, JP, vol. 39, no. 1, 1999, pages 56 - 63, XP001182011, ISSN: 0915-1559 *
TRAINT S ET AL: "NIEDRIGLEGIERTE TRIP-FEINBLECHE MIT KUPFERZUSATZ", BHM. BERG UND HUETTENMAENNISCHE MONATSHEFTE, SPRINGER, VIENNA, AU, vol. 144, no. 9, 1999, pages 362 - 368, XP001117545, ISSN: 0005-8912 *

Also Published As

Publication number Publication date
WO2002061161A1 (en) 2002-08-08
EP1365037A1 (en) 2003-11-26
EP1365037B1 (en) 2008-04-02

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