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EP2017363A3 - High strength cold-rolled steel sheet and method for manufacturing the same - Google Patents

High strength cold-rolled steel sheet and method for manufacturing the same Download PDF

Info

Publication number
EP2017363A3
EP2017363A3 EP08159197A EP08159197A EP2017363A3 EP 2017363 A3 EP2017363 A3 EP 2017363A3 EP 08159197 A EP08159197 A EP 08159197A EP 08159197 A EP08159197 A EP 08159197A EP 2017363 A3 EP2017363 A3 EP 2017363A3
Authority
EP
European Patent Office
Prior art keywords
rolled steel
high strength
strength cold
less
manufacturing
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.)
Withdrawn
Application number
EP08159197A
Other languages
German (de)
French (fr)
Other versions
EP2017363A2 (en
Inventor
Kohei c/o Intellectual Prop. Dept. JFE Steel corp. Hasegawa
Hiroshi c/o Intellectual Prop. Dept. JFE Steel corp. Matsuda
Fusato c/o Intellectual Prop. Dept. JFE Steel corp. Kitano
Kenji c/o Intellectual Prop. Dept. JFE Steel corp. Kawamura
Hideyuki c/o Intellectual Prop. Dept. JFE Steel corp. Tsurumaru
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.)
JFE Steel Corp
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
Priority claimed from JP2002173668A external-priority patent/JP4265152B2/en
Priority claimed from JP2002173669A external-priority patent/JP4265153B2/en
Application filed by JFE Steel Corp filed Critical JFE Steel Corp
Publication of EP2017363A2 publication Critical patent/EP2017363A2/en
Publication of EP2017363A3 publication Critical patent/EP2017363A3/en
Withdrawn legal-status Critical Current

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
    • C22C38/06—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
    • C22C38/02—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
    • 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
    • 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
    • C21D8/0236—Cold rolling

Landscapes

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

Abstract

A high strength cold-rolled steel plate which has a chemical composition in mass%: C: 0.04 to 0.10%, Si: 0.5 to 1.5%, Mn: 1.8 to 3%, P: 0.02% or less, S: 0.01% or less, Sol.Al: 0.01 to 0.1%, N: 0.005% or less, and the balance: Fe and inevitable impurities, and has a metal structure consisting substantially of a ferrite phase and a martensite phase. The high strength cold-rolled steel plate exhibits good ductility of an elongation of 18% or more and excellent stretch-flanging property of a bore expanding percentage of 60% or more, in combination with a tensile strength of 780 MPa or more, and thus can be suitably used for a structural member of an automobile.
EP08159197A 2002-06-14 2003-06-04 High strength cold-rolled steel sheet and method for manufacturing the same Withdrawn EP2017363A3 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2002173668A JP4265152B2 (en) 2002-06-14 2002-06-14 High-tensile cold-rolled steel sheet with excellent elongation and stretch flangeability and method for producing the same
JP2002173669A JP4265153B2 (en) 2002-06-14 2002-06-14 High-tensile cold-rolled steel sheet with excellent elongation and stretch flangeability and method for producing the same
EP03736017A EP1514951B1 (en) 2002-06-14 2003-06-04 High strength cold rolled steel plate and method for production thereof

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP03736017A Division EP1514951B1 (en) 2002-06-14 2003-06-04 High strength cold rolled steel plate and method for production thereof

Publications (2)

Publication Number Publication Date
EP2017363A2 EP2017363A2 (en) 2009-01-21
EP2017363A3 true EP2017363A3 (en) 2009-08-05

Family

ID=29738398

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08159197A Withdrawn EP2017363A3 (en) 2002-06-14 2003-06-04 High strength cold-rolled steel sheet and method for manufacturing the same
EP03736017A Expired - Lifetime EP1514951B1 (en) 2002-06-14 2003-06-04 High strength cold rolled steel plate and method for production thereof

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP03736017A Expired - Lifetime EP1514951B1 (en) 2002-06-14 2003-06-04 High strength cold rolled steel plate and method for production thereof

Country Status (4)

Country Link
US (1) US20040238082A1 (en)
EP (2) EP2017363A3 (en)
DE (1) DE60335106D1 (en)
WO (1) WO2003106723A1 (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4530606B2 (en) * 2002-06-10 2010-08-25 Ｊｆｅスチール株式会社 Manufacturing method of ultra-high strength cold-rolled steel sheet with excellent spot weldability
US7442268B2 (en) * 2004-11-24 2008-10-28 Nucor Corporation Method of manufacturing cold rolled dual-phase steel sheet
US8337643B2 (en) * 2004-11-24 2012-12-25 Nucor Corporation Hot rolled dual phase steel sheet
US7959747B2 (en) * 2004-11-24 2011-06-14 Nucor Corporation Method of making cold rolled dual phase steel sheet
JP4461112B2 (en) 2006-03-28 2010-05-12 株式会社神戸製鋼所 High strength steel plate with excellent workability
US11155902B2 (en) * 2006-09-27 2021-10-26 Nucor Corporation High strength, hot dip coated, dual phase, steel sheet and method of manufacturing same
US7608155B2 (en) * 2006-09-27 2009-10-27 Nucor Corporation High strength, hot dip coated, dual phase, steel sheet and method of manufacturing same
EP2115178B1 (en) * 2007-02-23 2018-06-20 Tata Steel IJmuiden BV Cold rolled and continuously annealed high strength steel strip and method for producing said steel
US8435363B2 (en) * 2007-10-10 2013-05-07 Nucor Corporation Complex metallographic structured high strength steel and manufacturing same
EP2216422B1 (en) * 2007-11-22 2012-09-12 Kabushiki Kaisha Kobe Seiko Sho High-strength cold-rolled steel sheet
EP2105223A1 (en) * 2008-03-19 2009-09-30 Nucor Corporation Strip casting apparatus with casting roll positioning
US20090236068A1 (en) * 2008-03-19 2009-09-24 Nucor Corporation Strip casting apparatus for rapid set and change of casting rolls
US20090288798A1 (en) * 2008-05-23 2009-11-26 Nucor Corporation Method and apparatus for controlling temperature of thin cast strip
US8128762B2 (en) * 2008-08-12 2012-03-06 Kobe Steel, Ltd. High-strength steel sheet superior in formability
JP5394709B2 (en) 2008-11-28 2014-01-22 株式会社神戸製鋼所 Super high strength steel plate with excellent hydrogen embrittlement resistance and workability
JP5709151B2 (en) * 2009-03-10 2015-04-30 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
US20120328901A1 (en) * 2010-01-13 2012-12-27 Toshiki Nonaka High tensile steel sheet superior in formability and method of manufacturing the same
US10280475B2 (en) * 2010-12-17 2019-05-07 Nippon Steel & Sumitomo Metal Corporation Hot-dip galvanized steel sheet and manufacturing method thereof
RU2601037C2 (en) * 2011-11-28 2016-10-27 Арселормитталь Инвестигасьон И Десарролло С.Л. High silicon bearing dual phase steels with improved ductility
WO2013089095A1 (en) * 2011-12-15 2013-06-20 株式会社神戸製鋼所 High-strength cold-rolled steel sheet having small variations in strength and ductility, and method for producing same
JP5860343B2 (en) * 2012-05-29 2016-02-16 株式会社神戸製鋼所 High strength cold-rolled steel sheet with small variations in strength and ductility and method for producing the same
CN103060703B (en) 2013-01-22 2015-09-23 宝山钢铁股份有限公司 A kind of cold rolling diphasic strip steel of 780MPa level and manufacture method thereof
CN105874091A (en) 2014-01-06 2016-08-17 新日铁住金株式会社 Hot-formed member and process for manufacturing same
TWI491742B (en) * 2014-01-06 2015-07-11 Nippon Steel & Sumitomo Metal Corp Steel sheet and manufacturing method thereof
KR101821913B1 (en) 2014-01-06 2018-03-08 신닛테츠스미킨 카부시키카이샤 Steel material and process for producing same
JP5935843B2 (en) * 2014-08-08 2016-06-15 Ｊｆｅスチール株式会社 Cold-rolled steel sheet with excellent spot weldability and method for producing the same
CN113737086A (en) * 2020-05-27 2021-12-03 宝山钢铁股份有限公司 Economical 780 MPa-grade cold-rolled annealed dual-phase steel and manufacturing method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04333524A (en) * 1991-05-09 1992-11-20 Nippon Steel Corp Production of high strength dual-phase steel sheet having superior ductility
JPH10147838A (en) * 1996-11-18 1998-06-02 Kobe Steel Ltd High strength steel sheet excellent in impact resistance, and its production
EP1201780A1 (en) * 2000-04-21 2002-05-02 Nippon Steel Corporation Steel plate having excellent burring workability together with high fatigue strength, and method for producing the same
JP2002161336A (en) * 2000-09-12 2002-06-04 Nkk Corp Super high tensile-strength cold-rolled steel sheet and manufacturing method therefor
EP1512762A1 (en) * 2002-06-10 2005-03-09 JFE Steel Corporation Method for producing cold rolled steel plate of super high strength

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JPS5855219B2 (en) 1979-04-24 1983-12-08 日本鋼管株式会社 Manufacturing method of low yield ratio high strength cold rolled steel sheet
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JP3478128B2 (en) 1998-06-12 2003-12-15 Ｊｆｅスチール株式会社 Method for producing composite structure type high tensile cold rolled steel sheet excellent in ductility and stretch flangeability
JP3793350B2 (en) * 1998-06-29 2006-07-05 新日本製鐵株式会社 Dual-phase high-strength cold-rolled steel sheet with excellent dynamic deformation characteristics and manufacturing method thereof
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CN1147609C (en) * 2000-04-07 2004-04-28 川崎制铁株式会社 Hot rolled steel plate, cold rolled steel plate and hot dip galvanized steel plate being excellent in strain aging hardening characteristics and method for their production
JP4414563B2 (en) 2000-06-12 2010-02-10 新日本製鐵株式会社 High-strength steel sheet excellent in formability and hole expansibility and method for producing the same
DE60138204D1 (en) * 2000-09-12 2009-05-14 Jfe Steel Corp ULTRA HIGH-RESISTANT COLD-ROLLED STEEL PLATE AND ITS MANUFACTURING METHOD
CA2387322C (en) * 2001-06-06 2008-09-30 Kawasaki Steel Corporation High-ductility steel sheet excellent in press formability and strain age hardenability, and method for manufacturing the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04333524A (en) * 1991-05-09 1992-11-20 Nippon Steel Corp Production of high strength dual-phase steel sheet having superior ductility
JPH10147838A (en) * 1996-11-18 1998-06-02 Kobe Steel Ltd High strength steel sheet excellent in impact resistance, and its production
EP1201780A1 (en) * 2000-04-21 2002-05-02 Nippon Steel Corporation Steel plate having excellent burring workability together with high fatigue strength, and method for producing the same
JP2002161336A (en) * 2000-09-12 2002-06-04 Nkk Corp Super high tensile-strength cold-rolled steel sheet and manufacturing method therefor
EP1512762A1 (en) * 2002-06-10 2005-03-09 JFE Steel Corporation Method for producing cold rolled steel plate of super high strength

Also Published As

Publication number Publication date
EP1514951A4 (en) 2006-05-10
US20040238082A1 (en) 2004-12-02
WO2003106723A1 (en) 2003-12-24
EP2017363A2 (en) 2009-01-21
EP1514951A1 (en) 2005-03-16
DE60335106D1 (en) 2011-01-05
EP1514951B1 (en) 2010-11-24

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