WO2009075542A3 - High strength steel plate for high heat input welding having welded joint with superior impact toughness in weld heat affected zone - Google Patents

High strength steel plate for high heat input welding having welded joint with superior impact toughness in weld heat affected zone Download PDF

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Publication number
WO2009075542A3
WO2009075542A3 PCT/KR2008/007358 KR2008007358W WO2009075542A3 WO 2009075542 A3 WO2009075542 A3 WO 2009075542A3 KR 2008007358 W KR2008007358 W KR 2008007358W WO 2009075542 A3 WO2009075542 A3 WO 2009075542A3
Authority
WO
WIPO (PCT)
Prior art keywords
welded joint
tio
steel plate
strength steel
affected zone
Prior art date
Application number
PCT/KR2008/007358
Other languages
French (fr)
Other versions
WO2009075542A2 (en
Inventor
Hong-Chul Jeong
Seung-Gab Hong
Young-Hwan Park
Original Assignee
Posco
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 filed Critical Posco
Priority to JP2010537866A priority Critical patent/JP5487114B2/en
Priority to CN2008801250346A priority patent/CN101918607B/en
Publication of WO2009075542A2 publication Critical patent/WO2009075542A2/en
Publication of WO2009075542A3 publication Critical patent/WO2009075542A3/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
    • C22C38/14—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
    • C22C38/001—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
    • C22C38/02—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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Nonmetallic Welding Materials (AREA)
  • Arc Welding In General (AREA)

Abstract

There is provided welding structural steel, including, by weight, 0.01 to 0.2% C, 0.1 to 0.5% Si, 1.0 to 3.0% Mn, 0.01 to 0.1% Ti, 0.5 to 3.0% Ni, 0.0003 to 0.01% B, 0.05 to 1.0% Mo, 0.004 to 0.008% N, at most 0.030% P, 0.005 to 0.05% Al, at most 0.030% S, 0.01 to 0.03% O, and the balance of Fe and unavoidable impurities. The Ti, O, N, B, Mn and S satisfy relations of 1.3≤Ti/O≤3.0, 7≤Ti/N≤12,0.8≤N/B<1.5, and 11≤(Ti+4B)/N≤16. A fine structure of a welded joint of the steel includes acicular ferrite of 85%, TiO and TiO-(Ti5B)N-MnS composite oxides are dispersed uniformly in the structure at a spacing of 0.5μm or shorter, and have a grain size ranging from 0.01 to 0.1μm. The number of TiO and TiO-(Ti5B)N-MnS composite oxides in the welded joint is 1.0x107/mm3 or more. The welding structural steel ensures high utility and stable use thereof because of its excellent tensile strength, elongation, hardness properties and surface properties.
PCT/KR2008/007358 2007-12-13 2008-12-12 High strength steel plate for high heat input welding having welded joint with superior impact toughness in weld heat affected zone WO2009075542A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2010537866A JP5487114B2 (en) 2007-12-13 2008-12-12 Steel for welded structures including welded joints with excellent high heat input shock toughness
CN2008801250346A CN101918607B (en) 2007-12-13 2008-12-12 High strength steel plate for high heat input welding having welded joint with superior impact toughness in weld heat affected zone

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020070129948A KR100957940B1 (en) 2007-12-13 2007-12-13 High strength Steel Plate for High Heat Input Welding having Welded Joint with Superior Impact Toughness in Weld Heat Affected Zone
KR10-2007-0129948 2007-12-13

Publications (2)

Publication Number Publication Date
WO2009075542A2 WO2009075542A2 (en) 2009-06-18
WO2009075542A3 true WO2009075542A3 (en) 2010-07-15

Family

ID=40755992

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2008/007358 WO2009075542A2 (en) 2007-12-13 2008-12-12 High strength steel plate for high heat input welding having welded joint with superior impact toughness in weld heat affected zone

Country Status (4)

Country Link
JP (1) JP5487114B2 (en)
KR (1) KR100957940B1 (en)
CN (1) CN101918607B (en)
WO (1) WO2009075542A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5607002B2 (en) * 2011-02-02 2014-10-15 株式会社神戸製鋼所 Weld metal with excellent resistance to hydrogen embrittlement
JP5606985B2 (en) 2011-04-08 2014-10-15 株式会社神戸製鋼所 Weld metal with excellent resistance to hydrogen embrittlement
KR101351266B1 (en) * 2011-10-21 2014-01-15 한양대학교 산학협력단 900MPa HIGH STRENGTH WELDING JOINT HAVING EXCELLENT LOW TEMPERATURE TOUGHNESS
WO2016072681A1 (en) * 2014-11-03 2016-05-12 주식회사 포스코 Wire rod having enhanced strength and impact toughness and preparation method for same
CN112522567B (en) * 2019-09-19 2022-06-24 宝山钢铁股份有限公司 High-strength thin-specification high-corrosion-resistance steel and manufacturing method thereof
KR20230094724A (en) * 2021-12-21 2023-06-28 주식회사 포스코 High-strength welded joint with improved high heat input toughness

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002256377A (en) * 2001-03-01 2002-09-11 Nippon Steel Corp 600 MPa CLASS STEEL HAVING EXCELLENT LOW YR PROPERTY AND SUPERHIGH HEAT INPUT WELDED JOINT TOUGHNESS
WO2004022807A1 (en) * 2002-09-04 2004-03-18 Jfe Steel Corporation Steel product for high heat input welding and method for production thereof
JP2004124218A (en) * 2002-10-07 2004-04-22 Jfe Steel Kk Electroslag welded joint having weld metal with excellent toughness
JP2006124759A (en) * 2004-10-27 2006-05-18 Kobe Steel Ltd Thick steel plate having excellent high heat input welded joint toughness

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3739997B2 (en) * 2000-05-24 2006-01-25 株式会社神戸製鋼所 High-tensile steel plate with excellent weldability
KR100362681B1 (en) * 2000-07-13 2002-11-27 주식회사 포스코 steel plate having superior toughness in weld heat-affected zone and method for manufacturing the same, welding fabric using the same
WO2002048417A1 (en) * 2000-12-14 2002-06-20 Posco STEEL PLATE TO BE PRECIPITATING TiN + ZrN FOR WELDED STRUCTURES, METHOD FOR MANUFACTURING THE SAME AND WELDING FABRIC USING THE SAME
JP3759474B2 (en) * 2002-05-31 2006-03-22 新日本製鐵株式会社 Large heat input submerged arc welding method
KR100940667B1 (en) * 2002-12-27 2010-02-05 주식회사 포스코 High strength steel plate with superior HAZ toughness for high heat input welding and method for manufacturing the same
JP4341395B2 (en) * 2003-12-09 2009-10-07 住友金属工業株式会社 High strength steel and weld metal for high heat input welding
JP4903107B2 (en) * 2007-09-28 2012-03-28 Ｊｆｅスチール株式会社 Welded joint

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002256377A (en) * 2001-03-01 2002-09-11 Nippon Steel Corp 600 MPa CLASS STEEL HAVING EXCELLENT LOW YR PROPERTY AND SUPERHIGH HEAT INPUT WELDED JOINT TOUGHNESS
WO2004022807A1 (en) * 2002-09-04 2004-03-18 Jfe Steel Corporation Steel product for high heat input welding and method for production thereof
JP2004124218A (en) * 2002-10-07 2004-04-22 Jfe Steel Kk Electroslag welded joint having weld metal with excellent toughness
JP2006124759A (en) * 2004-10-27 2006-05-18 Kobe Steel Ltd Thick steel plate having excellent high heat input welded joint toughness

Also Published As

Publication number Publication date
JP2011506766A (en) 2011-03-03
JP5487114B2 (en) 2014-05-07
KR20090062598A (en) 2009-06-17
WO2009075542A2 (en) 2009-06-18
CN101918607B (en) 2012-09-19
CN101918607A (en) 2010-12-15
KR100957940B1 (en) 2010-05-13

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