EP3395997A4 - Low-yield-ratio type high-strength steel, and manufacturing method therefor - Google Patents

Low-yield-ratio type high-strength steel, and manufacturing method therefor Download PDF

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Publication number
EP3395997A4
EP3395997A4 EP16879212.5A EP16879212A EP3395997A4 EP 3395997 A4 EP3395997 A4 EP 3395997A4 EP 16879212 A EP16879212 A EP 16879212A EP 3395997 A4 EP3395997 A4 EP 3395997A4
Authority
EP
European Patent Office
Prior art keywords
yield
manufacturing
low
type high
strength 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.)
Granted
Application number
EP16879212.5A
Other languages
German (de)
French (fr)
Other versions
EP3395997A1 (en
EP3395997B1 (en
Inventor
Seng-Ho YU
Mun-Young JUNG
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 EP3395997A1 publication Critical patent/EP3395997A1/en
Publication of EP3395997A4 publication Critical patent/EP3395997A4/en
Application granted granted Critical
Publication of EP3395997B1 publication Critical patent/EP3395997B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • C22C38/001—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
    • C22C38/002—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
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • 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
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • 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
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • 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)
EP16879212.5A 2015-12-24 2016-12-02 Low-yield-ratio type high-strength steel, and manufacturing method therefor Active EP3395997B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020150186522A KR102348539B1 (en) 2015-12-24 2015-12-24 High strength steel having low yield ratio method for manufacturing the same
PCT/KR2016/014135 WO2017111345A1 (en) 2015-12-24 2016-12-02 Low-yield-ratio type high-strength steel, and manufacturing method therefor

Publications (3)

Publication Number Publication Date
EP3395997A1 EP3395997A1 (en) 2018-10-31
EP3395997A4 true EP3395997A4 (en) 2018-11-07
EP3395997B1 EP3395997B1 (en) 2020-09-02

Family

ID=59090793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16879212.5A Active EP3395997B1 (en) 2015-12-24 2016-12-02 Low-yield-ratio type high-strength steel, and manufacturing method therefor

Country Status (6)

Country Link
US (1) US20180371590A1 (en)
EP (1) EP3395997B1 (en)
JP (1) JP6845855B2 (en)
KR (1) KR102348539B1 (en)
CN (1) CN108474090B (en)
WO (1) WO2017111345A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101879082B1 (en) * 2016-12-21 2018-07-16 주식회사 포스코 Ultra high strength steel having low yield ratio method for manufacturing the same
KR102109277B1 (en) * 2018-10-26 2020-05-11 주식회사 포스코 Steel plate having low yield ratio and excellent heat affected zone toughness and method for manufacturing thereof
KR102255818B1 (en) * 2019-06-24 2021-05-25 주식회사 포스코 High strength steel for a structure having excellent corrosion resistance and manufacturing method for the same
KR102307903B1 (en) * 2019-11-04 2021-09-30 주식회사 포스코 Steel plate having high strength and excellent low-temperature impact toughness and method for manufacturing thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5597425A (en) * 1979-01-19 1980-07-24 Nippon Kokan Kk <Nkk> Preparation of high-tensile steel with low yield ratio, low carbon and low alloy
JPH0551694A (en) * 1991-08-20 1993-03-02 Nkk Corp High tensile strength steel with low yield ratio and its production
WO2008054166A1 (en) * 2006-11-02 2008-05-08 Posco Steel plate for linepipe having ultra-high strength and excellent low temperature toughness and manufacturing method of the same
KR20090052950A (en) * 2007-11-22 2009-05-27 주식회사 포스코 High strength and low yield ratio steel for structure having excellent low temperature toughness
EP2700728A1 (en) * 2011-04-21 2014-02-26 Nippon Steel & Sumitomo Metal Corporation High-strength cold-rolled steel sheet with highly even stretchabilty and excellent hole expansibility, and process for producing same
WO2014171062A1 (en) * 2013-04-15 2014-10-23 Ｊｆｅスチール株式会社 High-strength hot-rolled steel sheet and method for manufacturing same
KR20150002958A (en) * 2013-06-27 2015-01-08 현대제철 주식회사 Steel and method of manufacturing the same
KR20150074968A (en) * 2013-12-24 2015-07-02 주식회사 포스코 Hot rolled steel sheet having a good low temperature toughness and method for manufacturing the same

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5223375B2 (en) * 2007-03-01 2013-06-26 新日鐵住金株式会社 High-strength hot-rolled steel sheet for line pipe excellent in low-temperature toughness and method for producing the same
JP4972451B2 (en) * 2007-04-20 2012-07-11 株式会社神戸製鋼所 Low yield ratio high strength steel sheet with excellent low temperature toughness of weld heat affected zone and base metal and method for producing the same
KR101096992B1 (en) * 2008-03-27 2011-12-20 가부시키가이샤 고베 세이코쇼 780MPa CLASS LOW YIELD RATIO CIRCULAR STEEL FOR CONSTRUCTION STRUCTURE EXCELLENT IN EARTHQUAKE-PROOF PERFORMANCE, AND PROCESS FOR PRODUCING THE SAME
JP5162382B2 (en) * 2008-09-03 2013-03-13 株式会社神戸製鋼所 Low yield ratio high toughness steel plate
KR101070132B1 (en) * 2008-12-18 2011-10-05 주식회사 포스코 Steel with Excellent Low-Temperature Toughness for Construction and Manufacturing Method Thereof
JP5776398B2 (en) * 2011-02-24 2015-09-09 Ｊｆｅスチール株式会社 Low yield ratio high strength hot rolled steel sheet with excellent low temperature toughness and method for producing the same
KR101546124B1 (en) * 2013-03-28 2015-08-20 현대제철 주식회사 Hot-rolled steel and method of manufacturing the same
BR112015023632B1 (en) * 2013-04-04 2020-04-28 Jfe Steel Corp hot rolled steel sheet and method for producing it
JP5783229B2 (en) * 2013-11-28 2015-09-24 Ｊｆｅスチール株式会社 Hot-rolled steel sheet and manufacturing method thereof
WO2015098556A1 (en) * 2013-12-25 2015-07-02 新日鐵住金株式会社 Electric resistance welded steel pipe for oil well

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5597425A (en) * 1979-01-19 1980-07-24 Nippon Kokan Kk <Nkk> Preparation of high-tensile steel with low yield ratio, low carbon and low alloy
JPH0551694A (en) * 1991-08-20 1993-03-02 Nkk Corp High tensile strength steel with low yield ratio and its production
WO2008054166A1 (en) * 2006-11-02 2008-05-08 Posco Steel plate for linepipe having ultra-high strength and excellent low temperature toughness and manufacturing method of the same
KR20090052950A (en) * 2007-11-22 2009-05-27 주식회사 포스코 High strength and low yield ratio steel for structure having excellent low temperature toughness
EP2700728A1 (en) * 2011-04-21 2014-02-26 Nippon Steel & Sumitomo Metal Corporation High-strength cold-rolled steel sheet with highly even stretchabilty and excellent hole expansibility, and process for producing same
WO2014171062A1 (en) * 2013-04-15 2014-10-23 Ｊｆｅスチール株式会社 High-strength hot-rolled steel sheet and method for manufacturing same
KR20150002958A (en) * 2013-06-27 2015-01-08 현대제철 주식회사 Steel and method of manufacturing the same
KR20150074968A (en) * 2013-12-24 2015-07-02 주식회사 포스코 Hot rolled steel sheet having a good low temperature toughness and method for manufacturing the same

Also Published As

Publication number Publication date
JP6845855B2 (en) 2021-03-24
CN108474090B (en) 2021-02-12
KR20170076912A (en) 2017-07-05
WO2017111345A1 (en) 2017-06-29
US20180371590A1 (en) 2018-12-27
CN108474090A (en) 2018-08-31
EP3395997A1 (en) 2018-10-31
JP2019504199A (en) 2019-02-14
KR102348539B1 (en) 2022-01-07
EP3395997B1 (en) 2020-09-02

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