EP4039844A4 - High-strength ultra-thick steel with excellent cryogenic strain aging impact toughness at core thereof, and method for manufacturing same - Google Patents

High-strength ultra-thick steel with excellent cryogenic strain aging impact toughness at core thereof, and method for manufacturing same Download PDF

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Publication number
EP4039844A4
EP4039844A4 EP20872512.7A EP20872512A EP4039844A4 EP 4039844 A4 EP4039844 A4 EP 4039844A4 EP 20872512 A EP20872512 A EP 20872512A EP 4039844 A4 EP4039844 A4 EP 4039844A4
Authority
EP
European Patent Office
Prior art keywords
core
thick steel
manufacturing same
impact toughness
strain aging
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
EP20872512.7A
Other languages
German (de)
French (fr)
Other versions
EP4039844A1 (en
Inventor
Hak-Cheol Lee
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 EP4039844A1 publication Critical patent/EP4039844A1/en
Publication of EP4039844A4 publication Critical patent/EP4039844A4/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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of 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
    • C22C38/04—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
    • 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
    • C21D6/001—Heat treatment of ferrous alloys containing Ni
    • 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
    • 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
    • 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
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • 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
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • 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

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  • 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 Steel (AREA)
EP20872512.7A 2019-10-01 2020-09-25 High-strength ultra-thick steel with excellent cryogenic strain aging impact toughness at core thereof, and method for manufacturing same Pending EP4039844A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020190121723A KR102237486B1 (en) 2019-10-01 2019-10-01 High strength ultra thick steel plate having excellent very low temperature strain aging impact toughness at the center of thickness and method of manufacturing the same
PCT/KR2020/013062 WO2021066402A1 (en) 2019-10-01 2020-09-25 High-strength ultra-thick steel with excellent cryogenic strain aging impact toughness at core thereof, and method for manufacturing same

Publications (2)

Publication Number Publication Date
EP4039844A1 EP4039844A1 (en) 2022-08-10
EP4039844A4 true EP4039844A4 (en) 2023-09-13

Family

ID=75338297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20872512.7A Pending EP4039844A4 (en) 2019-10-01 2020-09-25 High-strength ultra-thick steel with excellent cryogenic strain aging impact toughness at core thereof, and method for manufacturing same

Country Status (6)

Country Link
US (1) US20220325395A1 (en)
EP (1) EP4039844A4 (en)
JP (1) JP7404520B2 (en)
KR (1) KR102237486B1 (en)
CN (1) CN114502762A (en)
WO (1) WO2021066402A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170335424A1 (en) * 2014-12-24 2017-11-23 Posco High-strength steel having superior brittle crack arrestability, and production method therefor
WO2018030737A1 (en) * 2016-08-08 2018-02-15 주식회사 포스코 Ultra-thick steel material having excellent resistance to brittle crack propagation and preparing method therefor
WO2018117767A1 (en) * 2016-12-23 2018-06-28 주식회사 포스코 High-strength steel material having enhanced resistance to brittle crack propagation and break initiation at low temperature and method for manufacturing same
US20190093204A1 (en) * 2014-12-24 2019-03-28 Posco High-strength steel having superior brittle crack arrestability, and production method therefor
WO2019124945A1 (en) * 2017-12-22 2019-06-27 주식회사 포스코 High-strength steel material for polar region environment having excellent anti-fracture characteristics at low temperatures and method for manufacturing same
WO2019132262A1 (en) * 2017-12-26 2019-07-04 주식회사 포스코 High-strength structural steel material having excellent fatigue crack propagation inhibitory characteristics and manufacturing method therefor

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JPH064903B2 (en) * 1985-04-09 1994-01-19 新日本製鐵株式会社 Steel plate with excellent brittle crack propagation arresting property and its manufacturing method
JP3968011B2 (en) 2002-05-27 2007-08-29 新日本製鐵株式会社 High strength steel excellent in low temperature toughness and weld heat affected zone toughness, method for producing the same and method for producing high strength steel pipe
JP4696615B2 (en) * 2005-03-17 2011-06-08 住友金属工業株式会社 High-tensile steel plate, welded steel pipe and manufacturing method thereof
KR100917914B1 (en) 2005-04-04 2009-09-16 신닛뽄세이테쯔 카부시키카이샤 High-strength steel sheet and high-strength welded steel pipe excelling in ductile fracture perf0rmance and pr0cess f0r pr0ducing them
JP4975304B2 (en) 2005-11-28 2012-07-11 新日本製鐵株式会社 Method for producing high-strength steel sheet having high tensile strength of 760 MPa class or more excellent in hydrogen-induced crack resistance and ductile fracture characteristics, and method for producing high-strength steel pipe using the steel sheet
KR100851189B1 (en) 2006-11-02 2008-08-08 주식회사 포스코 Steel plate for linepipe having ultra-high strength and excellent low temperature toughness and manufacturing method of the same
KR100957970B1 (en) * 2007-12-27 2010-05-17 주식회사 포스코 High-strength and high-toughness thick steel plate and method for producing the same
JP5532800B2 (en) 2009-09-30 2014-06-25 Ｊｆｅスチール株式会社 Low yield ratio high strength high uniform stretch steel plate with excellent strain aging resistance and method for producing the same
JP4897126B2 (en) 2010-05-27 2012-03-14 新日本製鐵株式会社 Thick steel plate manufacturing method
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Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170335424A1 (en) * 2014-12-24 2017-11-23 Posco High-strength steel having superior brittle crack arrestability, and production method therefor
US20190093204A1 (en) * 2014-12-24 2019-03-28 Posco High-strength steel having superior brittle crack arrestability, and production method therefor
WO2018030737A1 (en) * 2016-08-08 2018-02-15 주식회사 포스코 Ultra-thick steel material having excellent resistance to brittle crack propagation and preparing method therefor
WO2018117767A1 (en) * 2016-12-23 2018-06-28 주식회사 포스코 High-strength steel material having enhanced resistance to brittle crack propagation and break initiation at low temperature and method for manufacturing same
WO2019124945A1 (en) * 2017-12-22 2019-06-27 주식회사 포스코 High-strength steel material for polar region environment having excellent anti-fracture characteristics at low temperatures and method for manufacturing same
WO2019132262A1 (en) * 2017-12-26 2019-07-04 주식회사 포스코 High-strength structural steel material having excellent fatigue crack propagation inhibitory characteristics and manufacturing method therefor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2021066402A1 *

Also Published As

Publication number Publication date
WO2021066402A1 (en) 2021-04-08
JP7404520B2 (en) 2023-12-25
JP2022550795A (en) 2022-12-05
US20220325395A1 (en) 2022-10-13
EP4039844A1 (en) 2022-08-10
KR102237486B1 (en) 2021-04-08
CN114502762A (en) 2022-05-13

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