EP3889305C0 - High-strength steel plate having excellent low-temperature fracture toughness and elongation ratio, and manufacturing method therefor - Google Patents

High-strength steel plate having excellent low-temperature fracture toughness and elongation ratio, and manufacturing method therefor

Info

Publication number
EP3889305C0
EP3889305C0 EP19889727.4A EP19889727A EP3889305C0 EP 3889305 C0 EP3889305 C0 EP 3889305C0 EP 19889727 A EP19889727 A EP 19889727A EP 3889305 C0 EP3889305 C0 EP 3889305C0
Authority
EP
European Patent Office
Prior art keywords
manufacturing
steel plate
strength steel
method therefor
fracture toughness
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.)
Active
Application number
EP19889727.4A
Other languages
German (de)
French (fr)
Other versions
EP3889305A1 (en
EP3889305B1 (en
EP3889305A4 (en
Inventor
Jang-Yong Yoo
Moo-Jong Bae
Yoen-Jung 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 EP3889305A1 publication Critical patent/EP3889305A1/en
Publication of EP3889305A4 publication Critical patent/EP3889305A4/en
Application granted granted Critical
Publication of EP3889305C0 publication Critical patent/EP3889305C0/en
Publication of EP3889305B1 publication Critical patent/EP3889305B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • 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
    • 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
    • C22C38/06—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
    • C22C38/18—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
    • 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 Steel (AREA)
EP19889727.4A 2018-11-30 2019-11-29 High-strength steel plate having excellent low-temperature fracture toughness and elongation ratio, and manufacturing method therefor Active EP3889305B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020180151565A KR102164107B1 (en) 2018-11-30 2018-11-30 High strength steel plate having superior elongation percentage and excellent low-temperature toughness, and manufacturing method for the same
PCT/KR2019/016785 WO2020111891A1 (en) 2018-11-30 2019-11-29 High-strength steel plate having excellent low-temperature fracture toughness and elongation ratio, and manufacturing method therefor

Publications (4)

Publication Number Publication Date
EP3889305A1 EP3889305A1 (en) 2021-10-06
EP3889305A4 EP3889305A4 (en) 2021-10-06
EP3889305C0 true EP3889305C0 (en) 2024-04-10
EP3889305B1 EP3889305B1 (en) 2024-04-10

Family

ID=70854099

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19889727.4A Active EP3889305B1 (en) 2018-11-30 2019-11-29 High-strength steel plate having excellent low-temperature fracture toughness and elongation ratio, and manufacturing method therefor

Country Status (7)

Country Link
EP (1) EP3889305B1 (en)
JP (1) JP7372325B2 (en)
KR (1) KR102164107B1 (en)
CN (1) CN113166904B (en)
CA (1) CA3120271C (en)
RU (1) RU2771151C1 (en)
WO (1) WO2020111891A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112611656B (en) * 2020-12-14 2024-03-08 中南大学 Accurate measurement method for low-temperature elongation of aluminum alloy for aerospace
KR102393906B1 (en) * 2020-12-18 2022-05-03 주식회사 포스코 Method of predicting to dwtt transition temperature

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9811051A (en) * 1997-07-28 2000-08-15 Exxonmobil Upstream Res Co Steel plate, and, process to prepare it
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
JP4823841B2 (en) 2006-10-12 2011-11-24 新日本製鐵株式会社 High tensile strength steel sheet for super high heat input welding with low acoustic anisotropy and excellent weldability and tensile strength of 570 MPa class or more and method for producing the same
KR100951296B1 (en) * 2007-12-04 2010-04-02 주식회사 포스코 Steel plate for linepipe having high strength and excellent low temperature toughness and manufacturing method of the same
US8647564B2 (en) * 2007-12-04 2014-02-11 Posco High-strength steel sheet with excellent low temperature toughness and manufacturing thereof
WO2012002481A1 (en) * 2010-06-30 2012-01-05 新日本製鐵株式会社 Hot-rolled steel sheet and method for producing same
KR101253958B1 (en) * 2010-12-27 2013-04-16 주식회사 포스코 Steel plate for pipeline with excellent fracture arrestability and low yield ratio, and manufacturing method of the same
KR101360467B1 (en) 2011-12-23 2014-02-10 주식회사 포스코 Linepipe steel plate with excellent low temperature fracture toughness and high uniform elongation method for producing same
KR101439685B1 (en) * 2012-12-26 2014-09-12 주식회사 포스코 Steel plate for line pipe having superior uniform elongation ratio and low-temperature toughness
EP3042976B1 (en) 2013-08-30 2020-05-13 Nippon Steel Corporation Steel sheet for thick-walled high-strength line pipe having exceptional corrosion resistance, crush resistance properties, and low-temperature ductility, and line pipe
JP6354271B2 (en) * 2014-04-08 2018-07-11 新日鐵住金株式会社 High-strength hot-rolled steel sheet having a tensile strength of 780 MPa or more and excellent in low-temperature toughness, uniform elongation and hole expansibility, and a method for producing the same
CN104789863B (en) 2015-03-20 2017-01-18 宝山钢铁股份有限公司 X80 pipeline steel with good anti-strain aging property, pipeline pipe and manufacturing method of pipeline pipe
KR101889182B1 (en) 2016-12-20 2018-08-16 주식회사 포스코 Steel plate for welded steel pipe having excellent elogation of the longitudinal direction and toughness at low-temperature, method for manufacturing thereof and welded steel pipe using same
CN108467993B (en) 2018-06-11 2020-02-18 鞍钢股份有限公司 Ultra-wide high-toughness hot-rolled thick plate for low-temperature pipeline and production method thereof

Also Published As

Publication number Publication date
EP3889305A1 (en) 2021-10-06
JP2022510935A (en) 2022-01-28
WO2020111891A1 (en) 2020-06-04
EP3889305B1 (en) 2024-04-10
EP3889305A4 (en) 2021-10-06
CA3120271A1 (en) 2020-06-04
CA3120271C (en) 2023-09-12
JP7372325B2 (en) 2023-10-31
CN113166904A (en) 2021-07-23
KR20200066394A (en) 2020-06-10
KR102164107B1 (en) 2020-10-13
RU2771151C1 (en) 2022-04-27
CN113166904B (en) 2023-10-27

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