CA2283924A1 - Dual-phase type high-strength steel sheets having high impact energy absorption properties and a method of producing the same - Google Patents

Dual-phase type high-strength steel sheets having high impact energy absorption properties and a method of producing the same Download PDF

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Publication number
CA2283924A1
CA2283924A1 CA002283924A CA2283924A CA2283924A1 CA 2283924 A1 CA2283924 A1 CA 2283924A1 CA 002283924 A CA002283924 A CA 002283924A CA 2283924 A CA2283924 A CA 2283924A CA 2283924 A1 CA2283924 A1 CA 2283924A1
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CA
Canada
Prior art keywords
sigma
steel sheet
dual
deformation
same
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
CA002283924A
Other languages
French (fr)
Other versions
CA2283924C (en
Inventor
Akihiro Uenishi
Manabu Takahashi
Yukihisa Kuriyama
Yasuharu Sakuma
Osamu Kawano
Junichi Wakita
Hidesato Mabuchi
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
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Individual
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27524972&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2283924(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP19029797A external-priority patent/JP3530347B2/en
Priority claimed from JP22300897A external-priority patent/JP3936440B2/en
Priority claimed from JP25893897A external-priority patent/JP3839928B2/en
Application filed by Individual filed Critical Individual
Publication of CA2283924A1 publication Critical patent/CA2283924A1/en
Application granted granted Critical
Publication of CA2283924C publication Critical patent/CA2283924C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • C22C38/04—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
    • 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
    • C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
    • 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)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

A dual-phase high-strength steel sheet for automobiles, which possesses excellent collision safety and excellent dynamic deformation properties and is used mainly for structural members and reinforcements of automobiles, and a process for preparing the same. The steel sheet is characterized in that the microstructure of the finally obtained steel sheet is a composite texture comprising a main phase of ferrite and a secondary phase of other lowtemperature formed phase containing 3 to 50 %, in terms of volume fraction, of martensite after 5 % forming of the steel sheet, that the difference between the quasistatic deformation strength .sigma.s upon deformation in the strain range of from 5 x 10-4 to 5 x 10-3 (s-1) after application of predeformation of more than 0 to not more than 10 % in terms of corresponding strain and the dynamic deformation strength .sigma.d upon deformation in the strain range of from 5 x 102 to 5 x 103 (s-1) after the application of the predeformation, that is, .sigma.d-.sigma.s, is not less than 60 MPa, and that the work hardening index at a strain of 5 to 10 % is not less than 0.13.
CA002283924A 1997-03-17 1998-03-16 Dual-phase type high-strength steel sheets having high impact energy absorption properties and a method of producing the same Expired - Lifetime CA2283924C (en)

Applications Claiming Priority (11)

Application Number Priority Date Filing Date Title
JP8243497 1997-03-17
JP9-82434 1997-03-17
JP9-190299 1997-07-15
JP9-190297 1997-07-15
JP19029997 1997-07-15
JP19029797A JP3530347B2 (en) 1997-07-15 1997-07-15 How to select a high-strength steel sheet with excellent dynamic deformation characteristics
JP22300897A JP3936440B2 (en) 1997-08-06 1997-08-06 High-strength steel sheet for automobiles with excellent collision safety and formability and its manufacturing method
JP9-223008 1997-08-06
JP9-258938 1997-09-24
JP25893897A JP3839928B2 (en) 1997-07-15 1997-09-24 Dual phase type high strength steel plate with excellent dynamic deformation characteristics
PCT/JP1998/001101 WO1998041664A1 (en) 1997-03-17 1998-03-16 Dual-phase high-strength steel sheet having excellent dynamic deformation properties and process for preparing the same

Publications (2)

Publication Number Publication Date
CA2283924A1 true CA2283924A1 (en) 1998-09-24
CA2283924C CA2283924C (en) 2006-11-28

Family

ID=27524972

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002283924A Expired - Lifetime CA2283924C (en) 1997-03-17 1998-03-16 Dual-phase type high-strength steel sheets having high impact energy absorption properties and a method of producing the same

Country Status (7)

Country Link
EP (2) EP2314729B2 (en)
KR (1) KR100334949B1 (en)
CN (1) CN1080321C (en)
AU (1) AU717294B2 (en)
CA (1) CA2283924C (en)
TW (1) TW426742B (en)
WO (1) WO1998041664A1 (en)

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DE60133493T2 (en) * 2000-01-24 2009-05-07 Jfe Steel Corp. Hot-dip galvanized steel sheet and process for its production
DE60124792T2 (en) * 2000-02-23 2007-03-29 Jfe Steel Corp. High strength hot rolled steel sheet with excellent strain age properties and manufacturing process therefor
CA2372388C (en) * 2000-04-07 2009-05-26 Kawasaki Steel Corporation Hot-rolled steel sheet, cold-rolled steel sheet and hot-dip galvanized steel sheet excellent in strain age hardening property, and manufacturing method thereof
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US11155902B2 (en) 2006-09-27 2021-10-26 Nucor Corporation High strength, hot dip coated, dual phase, steel sheet and method of manufacturing same
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JP5165236B2 (en) * 2006-12-27 2013-03-21 新日鐵住金ステンレス株式会社 Stainless steel plate for structural members with excellent shock absorption characteristics
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Also Published As

Publication number Publication date
AU717294B2 (en) 2000-03-23
EP2314729B2 (en) 2017-03-08
EP0969112B2 (en) 2017-03-08
EP0969112A1 (en) 2000-01-05
CN1080321C (en) 2002-03-06
AU6311898A (en) 1998-10-12
CN1251140A (en) 2000-04-19
CA2283924C (en) 2006-11-28
KR20000076372A (en) 2000-12-26
EP2314729B1 (en) 2012-02-08
EP2314729A1 (en) 2011-04-27
EP0969112A4 (en) 2003-05-21
EP0969112B1 (en) 2011-08-17
KR100334949B1 (en) 2002-05-04
TW426742B (en) 2001-03-21
WO1998041664A1 (en) 1998-09-24

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