WO2009072559A1 - Process for producing thick high-strength steel plate excellent in brittle fracture arrestability and toughness of zone affected by heat in large-heat-input welding and thick high-strength steel plate excellent in brittle fracture arrestability and toughness of zone affected by heat in large-heat-input welding - Google Patents

Process for producing thick high-strength steel plate excellent in brittle fracture arrestability and toughness of zone affected by heat in large-heat-input welding and thick high-strength steel plate excellent in brittle fracture arrestability and toughness of zone affected by heat in large-heat-input welding Download PDF

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Publication number
WO2009072559A1
WO2009072559A1 PCT/JP2008/072051 JP2008072051W WO2009072559A1 WO 2009072559 A1 WO2009072559 A1 WO 2009072559A1 JP 2008072051 W JP2008072051 W JP 2008072051W WO 2009072559 A1 WO2009072559 A1 WO 2009072559A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat
steel plate
strength steel
toughness
thick high
Prior art date
Application number
PCT/JP2008/072051
Other languages
French (fr)
Japanese (ja)
Inventor
Akihiko Kojima
Yoichi Tanaka
Hiroyuki Shirahata
Kiyotaka Nakashima
Yoshihide Nagai
Original Assignee
Nippon Steel Corporation
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 Nippon Steel Corporation filed Critical Nippon Steel Corporation
Priority to EP08857772.1A priority Critical patent/EP2236631A4/en
Priority to CN2008800015476A priority patent/CN101578380B/en
Priority to JP2009507634A priority patent/JP4612735B2/en
Publication of WO2009072559A1 publication Critical patent/WO2009072559A1/en

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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
    • C22C38/04—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
    • 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
    • C22C1/00—Making non-ferrous alloys
    • C22C1/11—Making amorphous 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
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • 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
    • C22C38/12—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
    • 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
    • C21D2211/004—Dispersions; Precipitations
    • 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
    • C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints

Abstract

A process for producing a thick high-strength steel plate which comprises cooling a continuous-casting slab containing, in terms of mass%, 0.05-0.12% carbon, up to 0.3% silicon, 1-2% manganese, up to 0.015% phosphorus, up to 0.005% sulfur, 0.0003-0.003% boron, 0.01-0.15% vanadium, 0.001-0.1% aluminum, 0.005-0.02% titanium, 0.002-0.01% nitrogen, and up to 0.004% oxygen, with the remainder being iron and incidental impurities, to a temperature lower than Ar3 by at least 200°C, subsequently heating the slab again to 950-1,100°C, then roughly rolling the continuous-casting slab at 900°C or higher so as to result in a cumulative draft of 30% or more, subsequently conducting finish rolling at 700°C or higher to a cumulative draft of 50% or more under such conditions that the temperature at which the finish rolling is initiated and the temperature at which the finish rolling is terminated each is not higher than the temperature represented by the expression {-0.5x(slab heating temperature (°C)) + 1,325} (°C) to thereby form a rolled plate, and then rapidly cooling the rolled plate to 500°C or lower to obtain a steel plate. The continuous-casting slab has an amount of boron present in the form of solution in the austenitic raw material before transformation {effective boron amount: Bef (%)} of 0% or smaller in terms of calculated value and has a carbon equivalent (Ceq) in the range of 0.32-0.42%.
PCT/JP2008/072051 2007-12-06 2008-12-04 Process for producing thick high-strength steel plate excellent in brittle fracture arrestability and toughness of zone affected by heat in large-heat-input welding and thick high-strength steel plate excellent in brittle fracture arrestability and toughness of zone affected by heat in large-heat-input welding WO2009072559A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP08857772.1A EP2236631A4 (en) 2007-12-06 2008-12-04 Process for producing thick high-strength steel plate excellent in brittle fracture arrestability and toughness of zone affected by heat in large-heat-input welding and thick high-strength steel plate excellent in brittle fracture arrestability and toughness of zone affected by heat in large-heat-input welding
CN2008800015476A CN101578380B (en) 2007-12-06 2008-12-04 Process for producing thick high-strength steel plate excellent in brittle fracture arrestability and toughness of zone affected by heat in large-heat-input welding and thick high-strength steel plate
JP2009507634A JP4612735B2 (en) 2007-12-06 2008-12-04 Manufacturing method of thick high-strength steel plate with excellent brittle fracture propagation stop characteristics and high heat input weld heat affected zone toughness, and thick high strength steel plate with excellent brittle fracture propagation stop characteristics and high heat input weld heat affected zone toughness

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-315840 2007-12-06
JP2007315840 2007-12-06

Publications (1)

Publication Number Publication Date
WO2009072559A1 true WO2009072559A1 (en) 2009-06-11

Family

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Family Applications (1)

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PCT/JP2008/072051 WO2009072559A1 (en) 2007-12-06 2008-12-04 Process for producing thick high-strength steel plate excellent in brittle fracture arrestability and toughness of zone affected by heat in large-heat-input welding and thick high-strength steel plate excellent in brittle fracture arrestability and toughness of zone affected by heat in large-heat-input welding

Country Status (6)

Country Link
EP (1) EP2236631A4 (en)
JP (1) JP4612735B2 (en)
KR (1) KR101070093B1 (en)
CN (1) CN101578380B (en)
TW (1) TWI346706B (en)
WO (1) WO2009072559A1 (en)

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WO2010143726A1 (en) * 2009-06-11 2010-12-16 新日本製鐵株式会社 Process for producing thick high-strength steel plate with excellent toughness of heat-affected zone in high heat input welding and thick high-strength steel plate with excellent toughness of heat-affected zone in high heat input welding
CN102400053A (en) * 2010-09-07 2012-04-04 鞍钢股份有限公司 Steel plate for building structure with yield strength of 460 MPa, and manufacturing method thereof
WO2013077022A1 (en) 2011-11-25 2013-05-30 新日鐵住金株式会社 Steel material for welding
JP2013256699A (en) * 2012-06-13 2013-12-26 Nippon Steel & Sumitomo Metal Corp Thick high strength steel plate having excellent weldability and toughness of weld heat-affected zone and method for producing the same
CN103695777A (en) * 2013-12-20 2014-04-02 宝山钢铁股份有限公司 Thick steel plate with excellent tenacity for excellent-tenacity welding heat affected zone and manufacturing method thereof
JP5598618B1 (en) * 2013-03-26 2014-10-01 Ｊｆｅスチール株式会社 High strength thick steel plate for high heat input welding with excellent brittle crack propagation stopping characteristics and method for producing the same
JP5598617B1 (en) * 2013-03-26 2014-10-01 Ｊｆｅスチール株式会社 High strength thick steel plate for high heat input welding with excellent brittle crack propagation stopping characteristics and method for producing the same
US9403242B2 (en) 2011-03-24 2016-08-02 Nippon Steel & Sumitomo Metal Corporation Steel for welding
JP2017110249A (en) * 2015-12-15 2017-06-22 新日鐵住金株式会社 Sour resistant steel plate
EP2532765A4 (en) * 2010-02-04 2017-07-26 Nippon Steel & Sumitomo Metal Corporation High-strength welded steel pipe and method for producing the same
JP2018127677A (en) * 2017-02-08 2018-08-16 新日鐵住金株式会社 Steel material for tank and manufacturing method therefor
JP2019023322A (en) * 2017-07-21 2019-02-14 新日鐵住金株式会社 Steel plate and method for manufacturing steel plate
US10351937B2 (en) 2011-07-29 2019-07-16 Nippon Steel Corporation High-strength steel sheet excellent in impact resistance and manufacturing method thereof, and high-strength galvanized steel sheet and manufacturing method thereof
CN113416880A (en) * 2021-05-28 2021-09-21 包头钢铁（集团）有限责任公司 Preparation method of rare earth microalloyed high-corrosion-resistance 690 MPa-grade high-strength steel
WO2022045350A1 (en) * 2020-08-31 2022-03-03 日本製鉄株式会社 Steel sheet and method for manufacturing same
WO2022045351A1 (en) * 2020-08-31 2022-03-03 日本製鉄株式会社 Steel sheet and method for manufacturing same
WO2022045352A1 (en) * 2020-08-31 2022-03-03 日本製鉄株式会社 Steel sheet and method for producing same
CN114752724A (en) * 2022-05-25 2022-07-15 宝武集团鄂城钢铁有限公司 750 MPa-grade bridge steel with excellent low-internal-stress welding performance and preparation method thereof

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KR101271885B1 (en) * 2010-12-22 2013-06-05 주식회사 포스코 High strength steel plate having excellent toughness and method for producing the same
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CN104404369B (en) * 2014-11-27 2017-01-25 宝山钢铁股份有限公司 Thick steel plate capable of being welded at large heat input and manufacturing method thereof
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Publication number Publication date
CN101578380B (en) 2011-01-12
EP2236631A4 (en) 2017-03-29
CN101578380A (en) 2009-11-11
KR20090097167A (en) 2009-09-15
EP2236631A1 (en) 2010-10-06
JP4612735B2 (en) 2011-01-12
TW200932925A (en) 2009-08-01
KR101070093B1 (en) 2011-10-04
JPWO2009072559A1 (en) 2011-04-28
TWI346706B (en) 2011-08-11

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