WO2008123397A1 - Case-hardened steel pipe excellent in workability and process for production thereof - Google Patents

Case-hardened steel pipe excellent in workability and process for production thereof Download PDF

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Publication number
WO2008123397A1
WO2008123397A1 PCT/JP2008/056016 JP2008056016W WO2008123397A1 WO 2008123397 A1 WO2008123397 A1 WO 2008123397A1 JP 2008056016 W JP2008056016 W JP 2008056016W WO 2008123397 A1 WO2008123397 A1 WO 2008123397A1
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WO
WIPO (PCT)
Prior art keywords
steel pipe
case
hardened steel
pipe
workability
Prior art date
Application number
PCT/JP2008/056016
Other languages
French (fr)
Japanese (ja)
Inventor
Kenichi Beppu
Original Assignee
Sumitomo Metal Industries, 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 Sumitomo Metal Industries, Ltd. filed Critical Sumitomo Metal Industries, Ltd.
Priority to MX2009010307A priority Critical patent/MX2009010307A/en
Priority to KR1020097019966A priority patent/KR101113575B1/en
Priority to JP2009509185A priority patent/JP5126857B2/en
Priority to EP08739140.5A priority patent/EP2135962B1/en
Priority to CN2008800105171A priority patent/CN101646788B/en
Publication of WO2008123397A1 publication Critical patent/WO2008123397A1/en
Priority to US12/557,353 priority patent/US20100051143A1/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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/28—Normalising
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/32—Soft annealing, e.g. spheroidising
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/02—Hardening by precipitation
    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • 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
    • C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
    • 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
    • C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
    • C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/085—Cooling or quenching
    • 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
    • C22C38/22—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
    • C22C38/40—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
    • C22C38/48—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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • 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
    • C23C8/02—Pretreatment of the material to be coated
    • 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
    • C23C8/40—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 liquids, e.g. salt baths, liquid suspensions
    • C23C8/42—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 liquids, e.g. salt baths, liquid suspensions only one element being applied
    • C23C8/44—Carburising
    • C23C8/46—Carburising of ferrous surfaces
    • 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
    • C23C8/80—After-treatment
    • 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
    • C21D2211/003—Cementite
    • 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

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

Abstract

A case-hardened steel pipe which has a hardness of 72 to 80HRB and which can give an end product having a carburized case exhibiting high strength and wear resistance and satisfactorily high fracture resistance under impact load through working followed by carburizing and quenching under relatively mild conditions. The case-hardened steel pipe can be produced by making a pipe from a steel having a composition which contains by mass C: 0.1 to 0.25%, Si: 0.2 to 0.4%, Mn: 0.3 to 0.9%, P: 0.02% or below, S: 0.001 to 0.15%, Cr: 0.5 to 0.9%, Mo: 0.15 to 1%, Al: 0.01 to 0.1%, B: 0.0005 to 0.009%, and N: less than 0.006% with the balance consisting substantially of Fe, normalizing the pipe by soaking at a temperature of 880 to 980°C and then cooling at a cooling rate of 70°C/min or below, subjecting the normalized steel pipe to cold working, and then annealing the cold-worked steel pipe at a temperature of 700 to 820°C.
PCT/JP2008/056016 2007-03-29 2008-03-28 Case-hardened steel pipe excellent in workability and process for production thereof WO2008123397A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
MX2009010307A MX2009010307A (en) 2007-03-29 2008-03-28 Case-hardened steel pipe excellent in workability and process for production thereof.
KR1020097019966A KR101113575B1 (en) 2007-03-29 2008-03-28 Case-hardened steel pipe excellent in workability and process for production thereof
JP2009509185A JP5126857B2 (en) 2007-03-29 2008-03-28 Manufacturing method of case-hardened steel pipe with excellent workability
EP08739140.5A EP2135962B1 (en) 2007-03-29 2008-03-28 Case-hardened steel pipe excellent in workability and process for production thereof
CN2008800105171A CN101646788B (en) 2007-03-29 2008-03-28 Case-hardened steel pipe excellent in workability and process for production thereof
US12/557,353 US20100051143A1 (en) 2007-03-29 2009-09-10 Case Hardening Steel Tube Having Improved Workability and a Process for its Manufacture

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007088283 2007-03-29
JP2007-088283 2007-03-29

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/557,353 Continuation US20100051143A1 (en) 2007-03-29 2009-09-10 Case Hardening Steel Tube Having Improved Workability and a Process for its Manufacture

Publications (1)

Publication Number Publication Date
WO2008123397A1 true WO2008123397A1 (en) 2008-10-16

Family

ID=39830882

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/056016 WO2008123397A1 (en) 2007-03-29 2008-03-28 Case-hardened steel pipe excellent in workability and process for production thereof

Country Status (7)

Country Link
US (1) US20100051143A1 (en)
EP (1) EP2135962B1 (en)
JP (1) JP5126857B2 (en)
KR (1) KR101113575B1 (en)
CN (1) CN101646788B (en)
MX (1) MX2009010307A (en)
WO (1) WO2008123397A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105525205A (en) * 2015-12-25 2016-04-27 钢铁研究总院 390MPa-level normalizing type microalloyed steel plate
JP2016141821A (en) * 2015-01-30 2016-08-08 大同特殊鋼株式会社 Softening heat treatment method of steel material excellent in cold forgeability and crystal grain coarsening resistance
CN110923420A (en) * 2019-12-17 2020-03-27 常熟市恒丰机械制造有限公司 Production process of yarn guide
CN115491480A (en) * 2022-09-15 2022-12-20 浙江蓝能燃气设备有限公司 Hydrogen storage bottle type container heat treatment system

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CN102206792B (en) * 2011-05-04 2013-08-07 江苏标新久保田工业有限公司 Novel low alloy material sink roll
CN103031495B (en) * 2011-10-08 2014-08-27 山西太钢不锈钢股份有限公司 Mold casting method for hollow axle steel of high-speed passenger train
CN102373398A (en) * 2011-10-30 2012-03-14 山西太钢不锈钢股份有限公司 Preheating treatment method before boron steel carburization
US9340847B2 (en) * 2012-04-10 2016-05-17 Tenaris Connections Limited Methods of manufacturing steel tubes for drilling rods with improved mechanical properties, and rods made by the same
KR101467047B1 (en) * 2012-10-31 2014-12-01 현대제철 주식회사 Method of manufacturing heat resisting steel
CN103320597B (en) * 2013-06-14 2014-11-26 攀钢集团成都钢钒有限公司 Method for refining coarse grain of 10Cr9Mo1VNbN steel pipe and forged piece
WO2015092916A1 (en) * 2013-12-20 2015-06-25 新日鐵住金株式会社 Electric resistance welded steel pipe
CN105041658B (en) * 2015-08-11 2018-06-12 宁波甬微集团有限公司 A kind of refrigeration compressor rolling piston and its manufacturing method
CN105385817A (en) * 2015-11-12 2016-03-09 芜湖天金机械有限公司 Universal joint spherical shell normalizing process with cutting performance improving function
CN105714194B (en) * 2016-02-29 2017-06-20 宝鸡石油机械有限责任公司 ZG20CrNiMnMo cast steels and its steel-casting preparation method
US20180030562A1 (en) * 2016-07-28 2018-02-01 The Gleason Works Heat treatment of steel parts, particularly friction-welded steel parts
CN106222518A (en) * 2016-08-15 2016-12-14 合肥万向钱潮汽车零部件有限公司 A kind of material prescription of the universal-joint flange yoke of truck drive shaft
CN108893650A (en) * 2018-06-01 2018-11-27 张家港保税区恒隆钢管有限公司 A kind of front anticollision beam of automobile seamless steel pipe and preparation method thereof
CN110172638B (en) * 2019-05-10 2021-06-15 武汉钢铁有限公司 High-temperature carburized gear steel and production method thereof
CN112981237B (en) * 2021-01-28 2022-10-11 江阴兴澄特种钢铁有限公司 Steel for ball cage type universal joint retainer and production method thereof
CN113106334A (en) * 2021-03-11 2021-07-13 石家庄钢铁有限责任公司 Steel for cycloidal gear of RV reducer and preparation method thereof
EP4324941A1 (en) * 2022-08-19 2024-02-21 Benteler Steel/Tube GmbH Method for producing a tubular semi-finished product

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JPH0953150A (en) * 1995-08-11 1997-02-25 Sumitomo Metal Ind Ltd Case hardening steel and production of steel tube using same
JP2001200313A (en) * 2000-01-17 2001-07-24 Nippon Steel Corp Method for producing electric resistance welded tube for cold forging excellent in workability
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JPH0820820A (en) * 1994-07-08 1996-01-23 Sumitomo Metal Ind Ltd Production of cas hardened steel tube excellent in grain coarsening resistance
JPH0953150A (en) * 1995-08-11 1997-02-25 Sumitomo Metal Ind Ltd Case hardening steel and production of steel tube using same
JP2001200313A (en) * 2000-01-17 2001-07-24 Nippon Steel Corp Method for producing electric resistance welded tube for cold forging excellent in workability
JP2003328079A (en) * 2002-05-14 2003-11-19 Nippon Steel Corp Steel pipe superior in workability for cold forging, and manufacturing method therefor
JP2005105379A (en) * 2003-09-30 2005-04-21 Sanyo Special Steel Co Ltd Method for manufacturing boron-added case-hardened steel pipe superior in cold workability and grain size property
JP2005240175A (en) 2004-01-29 2005-09-08 Nippon Steel Corp Case hardening steel having excellent coarse grain preventing property on carburizing and fatigue property, and its production method

Non-Patent Citations (1)

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Title
See also references of EP2135962A4 *

Cited By (5)

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JP2016141821A (en) * 2015-01-30 2016-08-08 大同特殊鋼株式会社 Softening heat treatment method of steel material excellent in cold forgeability and crystal grain coarsening resistance
CN105525205A (en) * 2015-12-25 2016-04-27 钢铁研究总院 390MPa-level normalizing type microalloyed steel plate
CN110923420A (en) * 2019-12-17 2020-03-27 常熟市恒丰机械制造有限公司 Production process of yarn guide
CN115491480A (en) * 2022-09-15 2022-12-20 浙江蓝能燃气设备有限公司 Hydrogen storage bottle type container heat treatment system
CN115491480B (en) * 2022-09-15 2024-01-26 浙江蓝能氢能科技股份有限公司 Hydrogen storage bottle type container heat treatment system

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CN101646788B (en) 2011-04-13
KR20090125134A (en) 2009-12-03
US20100051143A1 (en) 2010-03-04
JPWO2008123397A1 (en) 2010-07-15
JP5126857B2 (en) 2013-01-23
MX2009010307A (en) 2009-10-16
EP2135962A1 (en) 2009-12-23
EP2135962B1 (en) 2016-07-13
EP2135962A4 (en) 2015-03-04
CN101646788A (en) 2010-02-10
KR101113575B1 (en) 2012-03-13

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