EP3561107A4 - Low-yield ratio steel sheet having excellent low-temperature toughness and method for manufacturing same - Google Patents

Low-yield ratio steel sheet having excellent low-temperature toughness and method for manufacturing same Download PDF

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Publication number
EP3561107A4
EP3561107A4 EP17882705.1A EP17882705A EP3561107A4 EP 3561107 A4 EP3561107 A4 EP 3561107A4 EP 17882705 A EP17882705 A EP 17882705A EP 3561107 A4 EP3561107 A4 EP 3561107A4
Authority
EP
European Patent Office
Prior art keywords
low
steel sheet
yield ratio
temperature toughness
manufacturing 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.)
Pending
Application number
EP17882705.1A
Other languages
German (de)
French (fr)
Other versions
EP3561107A1 (en
Inventor
Woo-Gyeom KIM
Kyung-Keun Um
Ki-Hyun Bang
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 EP3561107A1 publication Critical patent/EP3561107A1/en
Publication of EP3561107A4 publication Critical patent/EP3561107A4/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C21D1/26—Methods of annealing
    • C21D1/28—Normalising
    • 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
    • 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
    • C22C38/02—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
    • C22C38/08—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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • 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

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)
EP17882705.1A 2016-12-21 2017-12-08 Low-yield ratio steel sheet having excellent low-temperature toughness and method for manufacturing same Pending EP3561107A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160176126A KR101917451B1 (en) 2016-12-21 2016-12-21 Low-yield ratio steel sheet having excellent low-temperature toughness and method for manufacturing the same
PCT/KR2017/014411 WO2018117507A1 (en) 2016-12-21 2017-12-08 Low-yield ratio steel sheet having excellent low-temperature toughness and method for manufacturing same

Publications (2)

Publication Number Publication Date
EP3561107A1 EP3561107A1 (en) 2019-10-30
EP3561107A4 true EP3561107A4 (en) 2020-01-01

Family

ID=62626734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17882705.1A Pending EP3561107A4 (en) 2016-12-21 2017-12-08 Low-yield ratio steel sheet having excellent low-temperature toughness and method for manufacturing same

Country Status (5)

Country Link
EP (1) EP3561107A4 (en)
JP (1) JP6847225B2 (en)
KR (1) KR101917451B1 (en)
CN (1) CN110100027B (en)
WO (1) WO2018117507A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102200225B1 (en) * 2019-09-03 2021-01-07 주식회사 포스코 Steel Plate For Pressure Vessel With Excellent Lateral Expansion And Manufacturing Method Thereof
CN114008233B (en) * 2020-01-22 2023-01-17 株式会社Posco Wire rod for graphitization heat treatment, graphite steel and method for producing same
KR102480707B1 (en) 2020-11-12 2022-12-23 현대제철 주식회사 High-toughness nickel steel and method of manufacturing the same
CN113061811A (en) * 2021-03-17 2021-07-02 攀钢集团江油长城特殊钢有限公司 LNG (liquefied Natural gas) marine structural steel and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100833075B1 (en) * 2006-12-22 2008-05-27 주식회사 포스코 High strength and low yield ratio steel for structure having excellent low temperature toughness and brittle crack arrest property and producing method of the same
US7520943B2 (en) * 2003-06-12 2009-04-21 Jfe Steel Corporation Steel plate and welded steel tube exhibiting low yield ratio, high strength and high toughness
JP2012031509A (en) * 2010-06-29 2012-02-16 Jfe Steel Corp High strength low yield ratio steel with highly uniform elongation characteristic, method of producing the same and high strength low yield ratio welded steel pipe
JP2013049895A (en) * 2011-08-31 2013-03-14 Jfe Steel Corp High-strength welded steel pipe having high uniform elongation characteristic and excellent in weld zone low-temperature toughness and method for manufacturing the same
EP2940172A1 (en) * 2012-12-27 2015-11-04 Posco High strength steel sheet having excellent cryogenic temperature toughness and low yield ratio properties, and method for manufacturing same

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07278656A (en) * 1994-04-04 1995-10-24 Nippon Steel Corp Production of low yield ratio high tensile strength steel
JP2000063946A (en) * 1998-08-21 2000-02-29 Kawasaki Steel Corp Manufacture of thick steel plate with low yield point for earthquake-proof member
JP2002105589A (en) * 2000-09-26 2002-04-10 National Institute For Materials Science Low yield ratio high tensile strength steel and its production method
JP4445161B2 (en) * 2001-06-19 2010-04-07 新日本製鐵株式会社 Manufacturing method of thick steel plate with excellent fatigue strength
CN101775536A (en) * 2009-01-13 2010-07-14 宝山钢铁股份有限公司 225MPa earthquake-proof low yield strength steel and manufacturing method thereof
KR101403224B1 (en) 2011-12-28 2014-06-02 주식회사 포스코 Thick steel plate having excellent low yield ratio property and low temperature toughness and method for manufacturing the steel plate
CN102586680A (en) * 2012-03-22 2012-07-18 内蒙古包钢钢联股份有限公司 Low-yield-ratio steel plate for high-rise building structure and normalization process for steel plate
KR101412267B1 (en) 2012-04-25 2014-07-02 현대제철 주식회사 Steel sheet and method of manufacturing the same
KR20150065275A (en) * 2013-12-05 2015-06-15 두산중공업 주식회사 Cast steel having impact resistance at low temperature and method thereof
CN103667909B (en) * 2013-12-13 2016-02-03 武汉钢铁(集团)公司 A kind of mobile ocean Platform Steel of yield tensile ratio≤0.65 and production method
KR101799202B1 (en) * 2016-07-01 2017-11-20 주식회사 포스코 High-strength steel sheet having excellent low yield ratio property and low temperature toughness and method for manufacturing the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7520943B2 (en) * 2003-06-12 2009-04-21 Jfe Steel Corporation Steel plate and welded steel tube exhibiting low yield ratio, high strength and high toughness
KR100833075B1 (en) * 2006-12-22 2008-05-27 주식회사 포스코 High strength and low yield ratio steel for structure having excellent low temperature toughness and brittle crack arrest property and producing method of the same
JP2012031509A (en) * 2010-06-29 2012-02-16 Jfe Steel Corp High strength low yield ratio steel with highly uniform elongation characteristic, method of producing the same and high strength low yield ratio welded steel pipe
JP2013049895A (en) * 2011-08-31 2013-03-14 Jfe Steel Corp High-strength welded steel pipe having high uniform elongation characteristic and excellent in weld zone low-temperature toughness and method for manufacturing the same
EP2940172A1 (en) * 2012-12-27 2015-11-04 Posco High strength steel sheet having excellent cryogenic temperature toughness and low yield ratio properties, and method for manufacturing same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2018117507A1 *

Also Published As

Publication number Publication date
KR101917451B1 (en) 2018-11-09
CN110100027A (en) 2019-08-06
JP6847225B2 (en) 2021-03-24
JP2020503435A (en) 2020-01-30
WO2018117507A1 (en) 2018-06-28
KR20180072496A (en) 2018-06-29
CN110100027B (en) 2021-10-15
EP3561107A1 (en) 2019-10-30

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