ATE405685T1 - HIGH STRENGTH COLD ROLLED STEEL SHEET WITH EXCELLENT ADHESION OF COATING - Google Patents

HIGH STRENGTH COLD ROLLED STEEL SHEET WITH EXCELLENT ADHESION OF COATING

Info

Publication number
ATE405685T1
ATE405685T1 AT04028368T AT04028368T ATE405685T1 AT E405685 T1 ATE405685 T1 AT E405685T1 AT 04028368 T AT04028368 T AT 04028368T AT 04028368 T AT04028368 T AT 04028368T AT E405685 T1 ATE405685 T1 AT E405685T1
Authority
AT
Austria
Prior art keywords
steel sheet
rolled steel
coating
strength cold
high strength
Prior art date
Application number
AT04028368T
Other languages
German (de)
Inventor
Masahiro Nomura
Ikurou Hashimoto
Yoshinobu Omiya
Shinji Kozuma
Manabu Kamura
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34545001&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ATE405685(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Application granted granted Critical
Publication of ATE405685T1 publication Critical patent/ATE405685T1/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
    • C22C38/02—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
    • 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
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0278—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment 

Landscapes

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

Abstract

A cold-rolled steel sheet of DP (Dual Phase) type with a specific composition meets the requirements: (I) In the surface of the steel sheet, there exist Si-Mn complex oxides no larger than 5 mu m in diameter of the equivalent circle as many as 10 or more per 100 mu m<2> and the coverage of oxides composed mainly of Si on the surface of steel sheet is no more than 10% of surface area, and/or (II) The cross section near the surface of the steel sheet does not show cracks with a width no larger than 3 mu m and a depth no smaller than 5 mu m in arbitrary ten fields of observation under an SEM with a magnification of 2000. A high-strength cold-rolled steel sheet excellent in coating film adhesion and having a tensile strength no lower than 550 MPa is provided.
AT04028368T 2003-12-25 2004-11-30 HIGH STRENGTH COLD ROLLED STEEL SHEET WITH EXCELLENT ADHESION OF COATING ATE405685T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003429151A JP3934604B2 (en) 2003-12-25 2003-12-25 High strength cold-rolled steel sheet with excellent coating adhesion

Publications (1)

Publication Number Publication Date
ATE405685T1 true ATE405685T1 (en) 2008-09-15

Family

ID=34545001

Family Applications (1)

Application Number Title Priority Date Filing Date
AT04028368T ATE405685T1 (en) 2003-12-25 2004-11-30 HIGH STRENGTH COLD ROLLED STEEL SHEET WITH EXCELLENT ADHESION OF COATING

Country Status (5)

Country Link
US (1) US20050139293A1 (en)
EP (1) EP1548142B2 (en)
JP (1) JP3934604B2 (en)
AT (1) ATE405685T1 (en)
DE (1) DE602004015922T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2671960B1 (en) * 2005-03-31 2017-11-01 Kabushiki Kaisha Kobe Seiko Sho High strength cold-rolled steel sheet and automobile components of steel having excellent properties in coating film adhesion, workability, and hydrogen embrittlement resistivity
JP4502947B2 (en) 2005-12-27 2010-07-14 株式会社神戸製鋼所 Steel plate with excellent weldability
GB2450066B (en) * 2006-03-31 2011-03-30 Kobe Steel Ltd High-strength cold rolled steel sheet excellent in chemical conversion treatment property
KR100851189B1 (en) * 2006-11-02 2008-08-08 주식회사 포스코 Steel plate for ultra high strength line pipe with excellent low temperature toughness and manufacturing method
EP3421634A1 (en) * 2007-02-23 2019-01-02 Tata Steel IJmuiden B.V. Cold rolled and continuously annealed high strength steel strip and method for producing said steel
PL2028282T3 (en) * 2007-08-15 2012-11-30 Thyssenkrupp Steel Europe Ag Dual-phase steel, flat product made of such dual-phase steel and method for manufacturing a flat product
EP2031081B1 (en) * 2007-08-15 2011-07-13 ThyssenKrupp Steel Europe AG Dual-phase steel, flat product made of such dual-phase steel and method for manufacturing a flat product
EP2123786A1 (en) * 2008-05-21 2009-11-25 ArcelorMittal France Method of manufacturing very high-resistance, cold-laminated dual-phase steel sheets, and sheets produced thereby
EP2816134A1 (en) * 2008-06-13 2014-12-24 Kabushiki Kaisha Kobe Seiko Sho Steel material for dissimilar metal joining, joined body of dissimilar metals and process for joining dissimilar metal materials
JP5399681B2 (en) 2008-10-08 2014-01-29 Ｊｆｅスチール株式会社 High workability and high strength steel pipe excellent in chemical conversion and process for producing the same
TWI412607B (en) 2009-03-30 2013-10-21 Nippon Steel & Sumitomo Metal Corp Carburized steel part
JP5834388B2 (en) * 2010-09-29 2015-12-24 Ｊｆｅスチール株式会社 Manufacturing method of high-strength steel sheet
JP5609494B2 (en) * 2010-09-29 2014-10-22 Ｊｆｅスチール株式会社 High strength steel plate and manufacturing method thereof
JP5810499B2 (en) * 2010-09-29 2015-11-11 Ｊｆｅスチール株式会社 Manufacturing method of high-strength steel sheet
KR20130049821A (en) 2010-09-30 2013-05-14 제이에프이 스틸 가부시키가이샤 High-strength steel sheet and method for producing same
JP5637530B2 (en) * 2010-10-26 2014-12-10 Ｊｆｅスチール株式会社 Ultra-high strength cold-rolled steel sheet with a tensile strength of 780 MPa or more that has high ductility and excellent chemical conversion properties
JP5853683B2 (en) 2011-01-25 2016-02-09 Ｊｆｅスチール株式会社 Method for producing cold-rolled steel sheet with excellent chemical conversion and post-coating corrosion resistance
KR20200106559A (en) * 2011-11-28 2020-09-14 아르셀러미탈 인베스티가시온 와이 데살롤로 에스엘 High silicon bearing dual phase steels with improved ductility
JP5982906B2 (en) 2012-03-19 2016-08-31 Ｊｆｅスチール株式会社 Method for producing high-strength hot-dip galvanized steel sheet
JP5637230B2 (en) 2013-02-28 2014-12-10 Ｊｆｅスチール株式会社 Manufacturing method of high-strength cold-rolled steel sheet
US20160060744A1 (en) * 2013-04-18 2016-03-03 Nippon Steel & Sumitomo Metal Corporation Case-hardening steel and case-hardened steel member
DE102013013067A1 (en) 2013-07-30 2015-02-05 Salzgitter Flachstahl Gmbh Silicon-containing microalloyed high-strength multiphase steel having a minimum tensile strength of 750 MPa and improved properties and processes for producing a strip of this steel
KR101998652B1 (en) 2015-03-18 2019-07-10 제이에프이 스틸 가부시키가이샤 High-strength cold-rolled steel sheet and method for producing the same
US11066720B2 (en) 2015-03-23 2021-07-20 Nippon Steel Corporation Hot-rolled steel sheet and manufacturing method thereof, and manufacturing method of cold-rolled steel sheet
US11453926B2 (en) 2016-03-31 2022-09-27 Jfe Steel Corporation Steel sheet, plated steel sheet, method for producing hot-rolled steel sheet, method for producing cold-rolled full hard steel sheet, method for producing steel sheet, and method for producing plated steel sheet
KR102519960B1 (en) * 2018-11-09 2023-04-10 제이에프이 스틸 가부시키가이샤 Cold-rolled steel sheet for zirconium-based chemical conversion treatment and manufacturing method thereof, and zirconium-based chemical conversion-treated steel sheet and manufacturing method thereof

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Also Published As

Publication number Publication date
EP1548142B1 (en) 2008-08-20
JP3934604B2 (en) 2007-06-20
DE602004015922T3 (en) 2013-09-12
DE602004015922D1 (en) 2008-10-02
EP1548142B2 (en) 2013-07-03
US20050139293A1 (en) 2005-06-30
EP1548142A1 (en) 2005-06-29
JP2005187863A (en) 2005-07-14

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