TW200706659A - 490 MPa grade high strength weldable structural steel having excellent in high temperature strength - Google Patents

490 MPa grade high strength weldable structural steel having excellent in high temperature strength

Info

Publication number
TW200706659A
TW200706659A TW094126181A TW94126181A TW200706659A TW 200706659 A TW200706659 A TW 200706659A TW 094126181 A TW094126181 A TW 094126181A TW 94126181 A TW94126181 A TW 94126181A TW 200706659 A TW200706659 A TW 200706659A
Authority
TW
Taiwan
Prior art keywords
less
structural steel
strength
weldable structural
high temperature
Prior art date
Application number
TW094126181A
Other languages
Chinese (zh)
Inventor
Yasushi Mizutani
Yoshiyuki Watanabe
Ryuuji Uemori
Tatsuya Kumagai
Original Assignee
Nippon Steel Corp
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 Corp filed Critical Nippon Steel Corp
Publication of TW200706659A publication Critical patent/TW200706659A/en

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
    • 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
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The present invention provides a 490 MPa grade high strength weldable structural steel having excellent in high temperature strength at more than 600 DEG C and less than 800 DEG C and a method of producing the same. This high strength weldable structural steel contains, in mass, C at more than 0.005% and less than 0.040%, Si at less than 0.5%, Mn at less than 0.5%, P at less than 0.02%, S at less than 0.01%, Mo at 0.3 - 1.5%, Nb at 0.03 - 0.15%, Al at less than 0.06%, N at less than 0.006%, and further contains one or more of Cu, Ni, Cr, V, Ti, Ca, REM or Mg, if necessary, and satisfy the welding crack sensitivity equation of P CM = C+ Si/30 + Mn/20 + Cu/20 + Ni/60 + Cr/20 + Mo/15 + V/10 + 5B < 0.15, and without containing B, and the remainder Fe and unavoidable impurities, and further the microstructure of this high strength weldable structural steel has a mixed structure composed of ferrite and bainite, where the ratio of bainite is 20 - 90%.
TW094126181A 2005-08-01 2005-08-02 490 MPa grade high strength weldable structural steel having excellent in high temperature strength TW200706659A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/014461 WO2007015311A1 (en) 2005-08-01 2005-08-01 490 MPa GRADE HIGH-TENSILE STEEL FOR WELDED STRUCTURE EXCELLENT IN HIGH-TEMPERATURE STRENGTH AND METHOD FOR PRODUCING SAME

Publications (1)

Publication Number Publication Date
TW200706659A true TW200706659A (en) 2007-02-16

Family

ID=37708594

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094126181A TW200706659A (en) 2005-08-01 2005-08-02 490 MPa grade high strength weldable structural steel having excellent in high temperature strength

Country Status (3)

Country Link
CN (1) CN101098978A (en)
TW (1) TW200706659A (en)
WO (1) WO2007015311A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR112012019769B1 (en) * 2010-02-08 2018-05-02 Nippon Steel & Sumitomo Metal Corporation STEEL PLATE PRODUCTION METHOD.
CN104419871B (en) * 2013-09-05 2017-02-01 鞍钢股份有限公司 Steel for welding structure with excellent marine environment corrosion resistance and manufacturing method thereof
CN107475630B (en) * 2017-09-01 2019-09-27 新冶高科技集团有限公司 A kind of hot galvanizing nano reinforcement high strength low-carbon Nb bearing steel and preparation method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0941035A (en) * 1995-08-04 1997-02-10 Kawasaki Steel Corp Production of low yield ratio hot rolled steel sheet excellent in toughness
JP3569499B2 (en) * 2001-04-02 2004-09-22 新日本製鐵株式会社 High strength steel excellent in weldability and method for producing the same
JP4031730B2 (en) * 2003-05-14 2008-01-09 新日本製鐵株式会社 Structural 490 MPa class high-strength refractory steel excellent in weldability and gas-cutting property and method for producing the same

Also Published As

Publication number Publication date
WO2007015311A1 (en) 2007-02-08
CN101098978A (en) 2008-01-02

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