EP3901307A4 - High strength hot-rolled steel sheet having excellent hole expansion ratio and manufacturing method for same - Google Patents

High strength hot-rolled steel sheet having excellent hole expansion ratio and manufacturing method for same Download PDF

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Publication number
EP3901307A4
EP3901307A4 EP19899564.9A EP19899564A EP3901307A4 EP 3901307 A4 EP3901307 A4 EP 3901307A4 EP 19899564 A EP19899564 A EP 19899564A EP 3901307 A4 EP3901307 A4 EP 3901307A4
Authority
EP
European Patent Office
Prior art keywords
manufacturing
steel sheet
high strength
same
rolled steel
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.)
Pending
Application number
EP19899564.9A
Other languages
German (de)
French (fr)
Other versions
EP3901307A2 (en
Inventor
Kyong-Su Park
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.)
Posco Holdings Inc
Original Assignee
Posco Co 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
Application filed by Posco Co Ltd filed Critical Posco Co Ltd
Publication of EP3901307A2 publication Critical patent/EP3901307A2/en
Publication of EP3901307A4 publication Critical patent/EP3901307A4/en
Pending 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with 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
    • C21D1/02—Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
    • 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
    • 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
    • C21D6/00—Heat treatment of ferrous 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • 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
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous 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
    • 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
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • 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
    • 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
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • 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
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
    • C21D2211/001—Austenite
    • 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)
  • 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)
EP19899564.9A 2018-12-19 2019-12-18 High strength hot-rolled steel sheet having excellent hole expansion ratio and manufacturing method for same Pending EP3901307A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020180165148A KR102209552B1 (en) 2018-12-19 2018-12-19 High strength hot-rolled steel sheet having excellent hole expansion ratio and manufacturing method for the same
PCT/KR2019/017979 WO2020130614A2 (en) 2018-12-19 2019-12-18 High strength hot-rolled steel sheet having excellent hole expansion ratio and manufacturing method for same

Publications (2)

Publication Number Publication Date
EP3901307A2 EP3901307A2 (en) 2021-10-27
EP3901307A4 true EP3901307A4 (en) 2022-04-27

Family

ID=71101488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19899564.9A Pending EP3901307A4 (en) 2018-12-19 2019-12-18 High strength hot-rolled steel sheet having excellent hole expansion ratio and manufacturing method for same

Country Status (6)

Country Link
US (1) US20220074007A1 (en)
EP (1) EP3901307A4 (en)
JP (1) JP7216356B2 (en)
KR (1) KR102209552B1 (en)
CN (1) CN113195767A (en)
WO (1) WO2020130614A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102404770B1 (en) 2019-12-20 2022-06-07 주식회사 포스코 High strength hot-rolled steel sheet having excellent yield ratio and manufactueing method for the same

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6284063B1 (en) * 1996-07-12 2001-09-04 Thyssen Stahl Ag Hot-rolled steel strip and method of making it
US20140251513A1 (en) * 2011-11-01 2014-09-11 Jfe Steel Corporation High-strength hot rolled steel sheet with excellent bendability and low-temperature toughness, and method for manufacturing the same
KR20150014736A (en) * 2013-07-30 2015-02-09 현대제철 주식회사 High strength hot-rolled steel sheet and method of manufacturing the same
KR20150075307A (en) * 2013-12-25 2015-07-03 주식회사 포스코 Ultra-high strength hot-rolled steel sheet with solid diffusion bonding properties, and method for producing the same
JP2017057472A (en) * 2015-09-17 2017-03-23 新日鐵住金株式会社 Hot rolled steel sheet and production method therefor
CN107779766A (en) * 2016-08-31 2018-03-09 Posco公司 The thin hot rolled steel plate of the excellent superhigh intensity of mouldability and its manufacture method
US20180112286A1 (en) * 2015-05-12 2018-04-26 Posco Ultra-high strength hot-rolled steel sheet having excellent bending workability and method for manufacturing same

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07197186A (en) * 1993-12-30 1995-08-01 Kobe Steel Ltd Hot-rolled steel sheet having >=980n/mm2 strength represented by excellent delayed fracture resistant characteristic and its production
JP3915460B2 (en) 2001-09-26 2007-05-16 Ｊｆｅスチール株式会社 High strength hot rolled steel sheet and method for producing the same
DE50208550D1 (en) 2002-08-28 2006-12-07 Thyssenkrupp Steel Ag A method for producing a pearlite-free hot rolled steel strip and hot strip produced by this method
JP4313591B2 (en) 2003-03-24 2009-08-12 新日本製鐵株式会社 High-strength hot-rolled steel sheet excellent in hole expansibility and ductility and manufacturing method thereof
JP4502646B2 (en) 2004-01-21 2010-07-14 株式会社神戸製鋼所 High-strength hot-rolled steel sheet with excellent workability, fatigue characteristics and surface properties
JP4543963B2 (en) 2004-03-18 2010-09-15 Ｊｆｅスチール株式会社 Hot-rolled steel sheet excellent in work hardenability and manufacturing method thereof
CN100590217C (en) * 2005-03-31 2010-02-17 杰富意钢铁株式会社 Hot-rolled steel sheet, method for production thereof and molded article formed from hot-rolled steel sheet
JP5195413B2 (en) 2008-12-26 2013-05-08 新日鐵住金株式会社 High-strength hot-rolled steel sheet excellent in bending workability and toughness anisotropy and method for producing the same
KR101412272B1 (en) * 2012-03-29 2014-06-25 현대제철 주식회사 Method of manufacturing high strength steel sheet
JP6136478B2 (en) 2013-04-02 2017-05-31 新日鐵住金株式会社 High-strength hot-rolled steel sheet excellent in toughness and rigidity in the rolling direction and method for producing the same
WO2015099222A1 (en) * 2013-12-26 2015-07-02 주식회사 포스코 Hot-rolled steel plate having excellent welding property and burring property and method for manufacturing same
KR101677396B1 (en) * 2015-11-02 2016-11-18 주식회사 포스코 Ultra high strength steel sheet having excellent formability and expandability, and method for manufacturing the same
WO2017169870A1 (en) * 2016-03-31 2017-10-05 Ｊｆｅスチール株式会社 Thin steel plate and plated steel plate, hot rolled steel plate manufacturing method, cold rolled full hard steel plate manufacturing method, heat-treated plate manufacturing method, thin steel plate manufacturing method and plated steel plate manufacturing method
KR102209592B1 (en) 2016-12-23 2021-01-29 주식회사 포스코 Ultra-high strength hot-rolled steel sheet with excellent bending workability and its manufacturing method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6284063B1 (en) * 1996-07-12 2001-09-04 Thyssen Stahl Ag Hot-rolled steel strip and method of making it
US20140251513A1 (en) * 2011-11-01 2014-09-11 Jfe Steel Corporation High-strength hot rolled steel sheet with excellent bendability and low-temperature toughness, and method for manufacturing the same
KR20150014736A (en) * 2013-07-30 2015-02-09 현대제철 주식회사 High strength hot-rolled steel sheet and method of manufacturing the same
KR20150075307A (en) * 2013-12-25 2015-07-03 주식회사 포스코 Ultra-high strength hot-rolled steel sheet with solid diffusion bonding properties, and method for producing the same
US20180112286A1 (en) * 2015-05-12 2018-04-26 Posco Ultra-high strength hot-rolled steel sheet having excellent bending workability and method for manufacturing same
JP2017057472A (en) * 2015-09-17 2017-03-23 新日鐵住金株式会社 Hot rolled steel sheet and production method therefor
CN107779766A (en) * 2016-08-31 2018-03-09 Posco公司 The thin hot rolled steel plate of the excellent superhigh intensity of mouldability and its manufacture method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2020130614A2 *

Also Published As

Publication number Publication date
JP2022513993A (en) 2022-02-09
JP7216356B2 (en) 2023-02-01
WO2020130614A3 (en) 2020-08-27
US20220074007A1 (en) 2022-03-10
WO2020130614A2 (en) 2020-06-25
CN113195767A (en) 2021-07-30
KR102209552B1 (en) 2021-01-28
EP3901307A2 (en) 2021-10-27
KR20200076239A (en) 2020-06-29

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RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: POSCO HOLDINGS INC.

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Owner name: POSCO CO., LTD