IN2012DN05089A - - Google Patents

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Publication number
IN2012DN05089A
IN2012DN05089A IN5089DEN2012A IN2012DN05089A IN 2012DN05089 A IN2012DN05089 A IN 2012DN05089A IN 5089DEN2012 A IN5089DEN2012 A IN 5089DEN2012A IN 2012DN05089 A IN2012DN05089 A IN 2012DN05089A
Authority
IN
India
Prior art keywords
steel material
less
mass
concentration
further containing
Prior art date
Application number
Inventor
Hirakami Daisuke
Chida Tetsushi
Tarui Toshimi
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 IN2012DN05089A publication Critical patent/IN2012DN05089A/en

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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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0093—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts
    • 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
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • 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
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
    • 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
    • C22C38/02—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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • 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
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with 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
    • C22C38/18—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
    • 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
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/24—Nitriding
    • C23C8/26—Nitriding of ferrous surfaces
    • 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
    • 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
    • C21D2221/00—Treating localised areas of an article
    • C21D2221/10—Differential treatment of inner with respect to outer regions, e.g. core and periphery, respectively

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Articles (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Laminated Bodies (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

A high strength steel material which is excellent in delayed fracture resistance containing, by mass%, C: 0.10 5 to 0.55%, Si: 0.01 to 3%, and Mn: 0.1 to 2%, further containing one or both of V: 1.5% or less and Mo: 3.0% or less, the contents of V and Mo satisfying V+1/2Mo>0.4%, further containing one or more of Cr: 0.05 to 1.5%, Nb: 0.001 to 0.05%, Cu: 0.01 to 48, Ni: 0.01 to 4%, and B: 10 0.0001 to 0.005%, and having a balance of Fe and unavoidable impurities, the structure being a mainly tempered martensite structure, the surface of the steel material being formed with (a) a nitrided layer having a thickness from the surface of the steel material of 200 15 p or more and a nitrogen concentration of 12.0 mass% or less and higher than the nitrogen concentration of the steel material by 0.02 mass% or more and (b) a low carbon region having a depth from the surface of the steel material of 100 p or more to 1000 p or less and having 20 a carbon concentration of 0.05 mass% or more and 0.9 time or less the carbon concentration of the steel material.
IN5089DEN2012 2010-03-11 2011-03-11 IN2012DN05089A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010054649 2010-03-11
PCT/JP2011/056481 WO2011111872A1 (en) 2010-03-11 2011-03-11 High-strength steel and high-strength bolt with excellent resistance to delayed fracture, and manufacturing method therefor

Publications (1)

Publication Number Publication Date
IN2012DN05089A true IN2012DN05089A (en) 2015-10-09

Family

ID=44563661

Family Applications (1)

Application Number Title Priority Date Filing Date
IN5089DEN2012 IN2012DN05089A (en) 2010-03-11 2011-03-11

Country Status (7)

Country Link
US (1) US20120247618A1 (en)
EP (1) EP2546379B1 (en)
JP (1) JP5177323B2 (en)
KR (1) KR101366375B1 (en)
CN (1) CN102812145A (en)
IN (1) IN2012DN05089A (en)
WO (1) WO2011111872A1 (en)

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EP2679701B1 (en) * 2011-02-23 2017-07-12 Dowa Thermotech Co., Ltd. Manufacturing method of a nitrided steel member
US20130284319A1 (en) * 2012-04-27 2013-10-31 Paul M. Novotny High Strength, High Toughness Steel Alloy
BR112014030346B1 (en) * 2012-06-20 2020-05-05 Nippon Steel & Sumitomo Metal Corp tubular materials from oil fields and production methods
MX2015005321A (en) * 2012-11-05 2015-07-14 Nippon Steel & Sumitomo Metal Corp Low-alloy steel for oil well pipes which has excellent sulfide stress cracking resistance, and method for manufacturing low-alloy steel for oil well pipes.
CN102943210B (en) * 2012-11-09 2015-02-04 谢亚平 High-strength bolt and processing method thereof
KR20140121229A (en) * 2013-04-05 2014-10-15 태양금속공업주식회사 A manufacturing method of steel bolt having high tensile strength
TWI551697B (en) 2013-06-07 2016-10-01 Nippon Steel & Sumitomo Metal Corp Heat treatment steel and its manufacturing method
NL2011269C2 (en) * 2013-08-05 2015-02-09 Onderzoekscentrum Voor Aanwending Van Staal N V Structure for use in a corrosive environment.
JP6422176B2 (en) * 2014-08-29 2018-11-14 日産自動車株式会社 Steel for high-strength bolts and high-strength bolts
CN104313492B (en) * 2014-11-07 2017-04-12 广东鼎耀工程技术有限公司 PC steel bar with high strength and toughness and heat treatment method thereof
DE102014017275A1 (en) * 2014-11-18 2016-05-19 Salzgitter Flachstahl Gmbh High strength air hardening multiphase steel with excellent processing properties and method of making a strip of this steel
CN107709594B (en) * 2015-06-29 2020-03-20 日本制铁株式会社 Bolt
CN105861919A (en) * 2016-06-14 2016-08-17 江苏永昊高强度螺栓有限公司 Production process of high-strength bolt
JP6614349B2 (en) * 2016-07-05 2019-12-04 日本製鉄株式会社 Rolled wire rod
CN106521316B (en) * 2016-11-15 2018-08-07 江阴兴澄特种钢铁有限公司 Carbon and low-alloy round steel and its manufacturing method in a kind of fastener high-hardenability
CN106756516B (en) * 2017-02-07 2018-06-08 和县隆盛精密机械有限公司 A kind of alloy-steel casting and its casting technique suitable for mechanical arm clamping screw
CN107058705A (en) * 2017-02-17 2017-08-18 江苏佳杰特种螺钉有限公司 A kind of production technology for the fastener applied in high ferro
RU2635641C1 (en) * 2017-03-28 2017-11-14 Юлия Алексеевна Щепочкина Cast steel
EP3640357A4 (en) * 2017-06-15 2020-09-30 Nippon Steel Corporation Rolled wire for spring steel
CN107513664A (en) * 2017-07-10 2017-12-26 安徽长江紧固件有限责任公司 A kind of torsion shear type high tensile bolt and its processing technology
CN107604243B (en) * 2017-08-09 2019-10-08 宁波市镇海甬鼎紧固件制造有限公司 A kind of high-strength bolt material and preparation method thereof
JP2019124481A (en) * 2018-01-12 2019-07-25 株式会社神戸製鋼所 Residual stress measurement method
CN111655895B (en) * 2018-01-30 2023-03-14 日产自动车株式会社 Bolt and fastening structure
JP7134411B2 (en) 2018-01-30 2022-09-12 日産自動車株式会社 bolt
CN109266964B (en) * 2018-10-25 2021-03-05 青岛天赢智能工业股份有限公司 Production and machining process of steel forging
JP7479794B2 (en) * 2019-04-16 2024-05-09 高周波熱錬株式会社 PC steel with excellent delayed fracture resistance and its manufacturing method
WO2020230872A1 (en) * 2019-05-14 2020-11-19 日本製鉄株式会社 Bolt and steel material for bolt
JP7464832B2 (en) 2019-05-14 2024-04-10 日本製鉄株式会社 Bolts and bolt steel
WO2021106086A1 (en) * 2019-11-26 2021-06-03 日本製鉄株式会社 Steel and bearing
CN113322410B (en) * 2020-02-28 2022-06-28 宝山钢铁股份有限公司 High-strength bolt steel with excellent delayed fracture resistance and preparation method thereof
CN111931309B (en) * 2020-08-24 2022-09-09 长江水利委员会长江科学院 Method for simulating tensile hardening softening fracture of anchor rod/anchor cable structure
CN112795854A (en) * 2020-12-23 2021-05-14 石家庄钢铁有限责任公司 High-strength fastener bolt steel and production method thereof
CN115433871B (en) * 2021-06-02 2023-07-07 宝山钢铁股份有限公司 High-strength steel resistant to hydrogen embrittlement delayed fracture and manufacturing method thereof
CN114058974B (en) * 2021-11-30 2022-09-13 马鞍山钢铁股份有限公司 15.9-grade corrosion-resistant high-strength bolt steel and production method and heat treatment method thereof
CN115386803B (en) * 2022-08-31 2023-07-25 马鞍山钢铁股份有限公司 Non-quenched and tempered steel for high-strength and high-toughness wind power bolts and production method thereof
CN116445829B (en) * 2023-06-16 2023-09-08 中国矿业大学(北京) Corrosion-resistant anchor rod and production process thereof

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JPH08165557A (en) * 1994-12-13 1996-06-25 Sumitomo Metal Ind Ltd Production of pitting resisting soft-nitrided gear
JPH10141341A (en) * 1996-11-13 1998-05-26 Nkk Corp High strength bolt excellent in delayed fracture
JPH10226817A (en) * 1996-12-11 1998-08-25 Sumitomo Metal Ind Ltd Production of steel for soft-nitriding and soft-nitrided parts using this steel
JP3754788B2 (en) * 1997-03-12 2006-03-15 中央発條株式会社 Coil spring with excellent delayed fracture resistance and manufacturing method thereof
JP2000337332A (en) * 2000-01-01 2000-12-05 Kobe Steel Ltd High strength bolt excellent in delayed fracture resistance
JP2000337334A (en) * 2000-01-01 2000-12-05 Kobe Steel Ltd High structure bolt excellent in delayed fracture resistance
JP3851533B2 (en) * 2001-10-05 2006-11-29 株式会社神戸製鋼所 High-strength non-tempered upset bolt wire, method for manufacturing the same, and high-strength non-tempered upset bolt
JP5251632B2 (en) * 2008-05-13 2013-07-31 新日鐵住金株式会社 High strength steel material with excellent delayed fracture resistance, high strength bolt and manufacturing method thereof
JP5251633B2 (en) * 2008-05-13 2013-07-31 新日鐵住金株式会社 High strength steel material with excellent delayed fracture resistance, high strength bolt and manufacturing method thereof

Also Published As

Publication number Publication date
CN102812145A (en) 2012-12-05
EP2546379B1 (en) 2015-04-29
US20120247618A1 (en) 2012-10-04
WO2011111872A1 (en) 2011-09-15
JP5177323B2 (en) 2013-04-03
KR20120056879A (en) 2012-06-04
EP2546379A4 (en) 2013-08-07
EP2546379A1 (en) 2013-01-16
KR101366375B1 (en) 2014-02-24
JPWO2011111872A1 (en) 2013-06-27

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