EP3480332A4 - High strength steel plate having excellent low yield ratio characteristics and low temperature toughness and method for manufacturing same - Google Patents

High strength steel plate having excellent low yield ratio characteristics and low temperature toughness and method for manufacturing same Download PDF

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Publication number
EP3480332A4
EP3480332A4 EP17820573.8A EP17820573A EP3480332A4 EP 3480332 A4 EP3480332 A4 EP 3480332A4 EP 17820573 A EP17820573 A EP 17820573A EP 3480332 A4 EP3480332 A4 EP 3480332A4
Authority
EP
European Patent Office
Prior art keywords
steel plate
high strength
strength steel
yield ratio
temperature 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.)
Granted
Application number
EP17820573.8A
Other languages
German (de)
French (fr)
Other versions
EP3480332B1 (en
EP3480332A1 (en
Inventor
Woo-Gyeom KIM
Ki-Hyun Bang
Kyung-Keun Um
Seng-Ho YU
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 EP3480332A1 publication Critical patent/EP3480332A1/en
Publication of EP3480332A4 publication Critical patent/EP3480332A4/en
Application granted granted Critical
Publication of EP3480332B1 publication Critical patent/EP3480332B1/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
    • 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
    • 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
    • C21D2211/001—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
EP17820573.8A 2016-07-01 2017-06-30 High strength steel plate having excellent low yield ratio characteristics and low temperature toughness and method for manufacturing same Active EP3480332B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160083588A KR101799202B1 (en) 2016-07-01 2016-07-01 High-strength steel sheet having excellent low yield ratio property and low temperature toughness and method for manufacturing the same
PCT/KR2017/006956 WO2018004297A1 (en) 2016-07-01 2017-06-30 High strength steel plate having excellent low yield ratio characteristics and low temperature toughness and method for manufacturing same

Publications (3)

Publication Number Publication Date
EP3480332A1 EP3480332A1 (en) 2019-05-08
EP3480332A4 true EP3480332A4 (en) 2019-06-26
EP3480332B1 EP3480332B1 (en) 2021-10-13

Family

ID=60786060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17820573.8A Active EP3480332B1 (en) 2016-07-01 2017-06-30 High strength steel plate having excellent low yield ratio characteristics and low temperature toughness and method for manufacturing same

Country Status (5)

Country Link
EP (1) EP3480332B1 (en)
JP (1) JP6771047B2 (en)
KR (1) KR101799202B1 (en)
CN (1) CN109328240B (en)
WO (1) WO2018004297A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101917451B1 (en) * 2016-12-21 2018-11-09 주식회사 포스코 Low-yield ratio steel sheet having excellent low-temperature toughness and method for manufacturing the same
KR102236852B1 (en) 2018-11-30 2021-04-06 주식회사 포스코 Steel plate for structure having excellent low yield ratio property and low temperature toughness and manufacturing method thereof
CN110373524B (en) * 2019-07-16 2021-05-04 河钢股份有限公司承德分公司 Heat treatment softening process for 90 kg-grade welding wire steel
JP7330862B2 (en) * 2019-11-01 2023-08-22 株式会社神戸製鋼所 High-strength steel sheet with excellent low-temperature toughness of base material and joint, and manufacturing method thereof
JP7338811B1 (en) 2022-04-20 2023-09-05 Ｊｆｅスチール株式会社 Steel plate and its manufacturing method
WO2023203815A1 (en) * 2022-04-20 2023-10-26 Ｊｆｅスチール株式会社 Steel sheet and method for producing same

Citations (4)

* 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
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
EP3012340A1 (en) * 2013-06-19 2016-04-27 Baoshan Iron & Steel Co., Ltd. Ht550 steel plate with ultrahigh toughness and excellent weldability and manufacturing method therefor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6057490B2 (en) * 1979-02-28 1985-12-16 新日本製鐵株式会社 Manufacturing method of high-strength steel plate with low yield ratio
JPH09256037A (en) * 1996-03-22 1997-09-30 Nippon Steel Corp Production of thick high tensile strength steel plate for stress relieving annealing treatment
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
JP4485427B2 (en) 2005-07-28 2010-06-23 株式会社神戸製鋼所 Low yield ratio high strength steel sheet
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
JP5761080B2 (en) * 2012-03-01 2015-08-12 新日鐵住金株式会社 High-strength hot-rolled steel sheet excellent in elongation, hole expansibility and fatigue characteristics, and manufacturing method thereof
KR20140118313A (en) * 2013-03-28 2014-10-08 현대제철 주식회사 Hot-rolled steel and method of manufacturing the same
JP5728115B1 (en) * 2013-09-27 2015-06-03 株式会社神戸製鋼所 High strength steel sheet excellent in ductility and low temperature toughness, and method for producing the same
CN105420605A (en) * 2015-11-30 2016-03-23 钢铁研究总院 Ultralow-yield-ratio cold-rolled dual-phase steel and manufacturing method thereof

Patent Citations (4)

* 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
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
EP3012340A1 (en) * 2013-06-19 2016-04-27 Baoshan Iron & Steel Co., Ltd. Ht550 steel plate with ultrahigh toughness and excellent weldability and manufacturing method therefor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2018004297A1 *

Also Published As

Publication number Publication date
EP3480332B1 (en) 2021-10-13
CN109328240A (en) 2019-02-12
JP6771047B2 (en) 2020-10-21
EP3480332A1 (en) 2019-05-08
KR101799202B1 (en) 2017-11-20
WO2018004297A1 (en) 2018-01-04
CN109328240B (en) 2022-05-17
JP2019524987A (en) 2019-09-05

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