WO2008105209A1 - 等速自在継手用部品及びその製造方法 - Google Patents

等速自在継手用部品及びその製造方法 Download PDF

Info

Publication number
WO2008105209A1
WO2008105209A1 PCT/JP2008/051230 JP2008051230W WO2008105209A1 WO 2008105209 A1 WO2008105209 A1 WO 2008105209A1 JP 2008051230 W JP2008051230 W JP 2008051230W WO 2008105209 A1 WO2008105209 A1 WO 2008105209A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
universal joint
constant velocity
velocity universal
manufacturing
Prior art date
Application number
PCT/JP2008/051230
Other languages
English (en)
French (fr)
Inventor
Kazuhiko Yoshida
Original Assignee
Ntn 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 Ntn Corporation filed Critical Ntn Corporation
Priority to US12/525,956 priority Critical patent/US8273188B2/en
Priority to EP08704039A priority patent/EP2128467A1/en
Publication of WO2008105209A1 publication Critical patent/WO2008105209A1/ja

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D3/2237—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts where the grooves are composed of radii and adjoining straight lines, i.e. undercut free [UF] type joints
    • 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
    • C21D1/06—Surface hardening
    • 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
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • 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
    • 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
    • C23C8/20—Carburising
    • C23C8/22—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
    • C23C8/06—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
    • C23C8/36—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 using ionised gases, e.g. ionitriding
    • C23C8/38—Treatment 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D2003/22303—Details of ball cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00—Manufacturing; Assembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00—Manufacturing; Assembly
    • F16D2250/0023—Shaping by pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00—Manufacturing; Assembly
    • F16D2250/003—Chip removing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00—Manufacturing; Assembly
    • F16D2250/0038—Surface treatment
    • F16D2250/0053—Hardening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/10—Surface characteristics; Details related to material surfaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Landscapes

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

Abstract

　本発明は、大幅な工程変更を伴うことなく高強度化が可能であって、小型化及び軽量化に貢献できる等速自在継手用部品とその製造方法を提供する。本発明の等速自在継手用部品は、冷間塑性加工を行った後、機械加工で鋭角部１５を形成する。その後、表面炭素濃度が０．４５ｍａｓｓ％～０．６０ｍａｓｓ％未満となる浸炭処理を行った後焼入れを行う。次に高周波誘導加熱焼入を行う。
PCT/JP2008/051230 2007-02-27 2008-01-28 等速自在継手用部品及びその製造方法 WO2008105209A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/525,956 US8273188B2 (en) 2007-02-27 2008-01-28 Constant velocity universal joint component and manufacturing method thereof
EP08704039A EP2128467A1 (en) 2007-02-27 2008-01-28 Component for constant velocity universal joint and method for manufacturing the component

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-047116 2007-02-27
JP2007047116A JP2008208940A (ja) 2007-02-27 2007-02-27 等速自在継手用部品及びその製造方法

Publications (1)

Publication Number Publication Date
WO2008105209A1 true WO2008105209A1 (ja) 2008-09-04

Family

ID=39721047

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/051230 WO2008105209A1 (ja) 2007-02-27 2008-01-28 等速自在継手用部品及びその製造方法

Country Status (4)

Country Link
US (1) US8273188B2 (ja)
EP (1) EP2128467A1 (ja)
JP (1) JP2008208940A (ja)
WO (1) WO2008105209A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102597547A (zh) * 2009-10-29 2012-07-18 Ntn株式会社 中空轴及等速万向接头

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5658934B2 (ja) * 2010-07-22 2015-01-28 光洋サーモシステム株式会社 浸炭焼入方法
FR2991341A1 (fr) * 2012-06-01 2013-12-06 Peugeot Citroen Automobiles Sa Procede d'enrichissement thermochimique avec trempe par induction.
US10612530B2 (en) * 2015-09-30 2020-04-07 Komatsu Ltd. Bent-axis hydraulic pump motor
US10774413B2 (en) 2015-11-11 2020-09-15 Honeywell International Inc. Low pressure induction carburization
JP7375300B2 (ja) * 2018-12-25 2023-11-08 株式会社ジェイテクト 等速ジョイントの構成部材の製造方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04103752A (ja) * 1990-08-24 1992-04-06 Hitachi Koki Co Ltd インパクトレンチ用ユニバーサルジョイントのオスドライブ部品の製造法
JPH05331616A (ja) 1992-05-29 1993-12-14 Ntn Corp 高炭素浸炭層を備えた等速自在継手
JPH11294476A (ja) * 1998-04-07 1999-10-26 Ntn Corp 等速自在継手
JP2000104749A (ja) 1998-09-30 2000-04-11 Ntn Corp 固定式等速ジョイント
JP2002371320A (ja) 2001-06-14 2002-12-26 Sanyo Special Steel Co Ltd 加工性および強度に優れた等速ジョイント用内輪の製造方法
JP3381738B2 (ja) 1993-09-20 2003-03-04 日産自動車株式会社 機械的強度に優れた機械構造部品の製造方法
JP3395252B2 (ja) 1993-06-16 2003-04-07 住友金属工業株式会社 疲労強度に優れた鋼の製造方法
JP2005048292A (ja) 1994-03-29 2005-02-24 Mazda Motor Corp 浸炭焼入れ方法
JP2006028541A (ja) * 2004-07-12 2006-02-02 Nissan Motor Co Ltd 高強度機械構造用部品の製造方法、および高強度機械構造用部品

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6478682B1 (en) * 1999-11-05 2002-11-12 Ntn Corporation Constant velocity universal joint
JP2002122145A (ja) * 2000-10-13 2002-04-26 Nachi Fujikoshi Corp 等速ジョイント用ボール
JP4390576B2 (ja) * 2003-03-04 2009-12-24 株式会社小松製作所 転動部材

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04103752A (ja) * 1990-08-24 1992-04-06 Hitachi Koki Co Ltd インパクトレンチ用ユニバーサルジョイントのオスドライブ部品の製造法
JPH05331616A (ja) 1992-05-29 1993-12-14 Ntn Corp 高炭素浸炭層を備えた等速自在継手
JP3395252B2 (ja) 1993-06-16 2003-04-07 住友金属工業株式会社 疲労強度に優れた鋼の製造方法
JP3381738B2 (ja) 1993-09-20 2003-03-04 日産自動車株式会社 機械的強度に優れた機械構造部品の製造方法
JP2005048292A (ja) 1994-03-29 2005-02-24 Mazda Motor Corp 浸炭焼入れ方法
JPH11294476A (ja) * 1998-04-07 1999-10-26 Ntn Corp 等速自在継手
JP2000104749A (ja) 1998-09-30 2000-04-11 Ntn Corp 固定式等速ジョイント
JP2002371320A (ja) 2001-06-14 2002-12-26 Sanyo Special Steel Co Ltd 加工性および強度に優れた等速ジョイント用内輪の製造方法
JP2006028541A (ja) * 2004-07-12 2006-02-02 Nissan Motor Co Ltd 高強度機械構造用部品の製造方法、および高強度機械構造用部品

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102597547A (zh) * 2009-10-29 2012-07-18 Ntn株式会社 中空轴及等速万向接头
US20120211125A1 (en) * 2009-10-29 2012-08-23 Kazuhiko Yoshida Hollow shaft and constant velocity universal joint
CN102597547B (zh) * 2009-10-29 2015-09-16 Ntn株式会社 中空轴及等速万向接头
US9856906B2 (en) * 2009-10-29 2018-01-02 Ntn Corporation Hollow shaft and constant velocity universal joint

Also Published As

Publication number Publication date
JP2008208940A (ja) 2008-09-11
US20100323803A1 (en) 2010-12-23
US8273188B2 (en) 2012-09-25
EP2128467A1 (en) 2009-12-02

Similar Documents

Publication Publication Date Title
WO2008105209A1 (ja) 等速自在継手用部品及びその製造方法
PL2218799T3 (pl) Część z hartowanej indukcyjnie stali nitronawęglanej mającej wyższą wytrzymałość zmęczeniową powierzchni w wysokiej temperaturze i sposób jej wytwarzania
EP1889929A4 (en) STEEL ELEMENTS, METHOD FOR THE HEAT TREATMENT AND METHOD FOR THE PRODUCTION THEREOF
WO2006111404A3 (de) Oberflächennachvernetzte superabsorber behandelt mit metallsalz und metalloxid
GB2454114B (en) Torque transmission device, such as a fixed homocinetic ball joint used as a counter track joint and method for its production
CN102618817A (zh) 用20CrMnTi钢加工成汽车变速箱零件的工艺
WO2008139639A1 (ja) ベンド管及びその製造方法
EP2562272A3 (en) Method for producing steel product having excellent mechanical properties, steel product produced with the method and its use
UA89842C2 (ru) ИЗДЕЛИЕ ИЗ БЕЗПОРИСТОИ мартенситно-Стареющей СТАЛИ И СПОСОБ ЕГО ИЗГОТОВЛЕНИЯ
WO2005072232A3 (en) Method and apparatus for the continuous fabrication of shaped metal articles
WO2008081517A1 (ja) 工具鋼の製造方法
WO2016014424A3 (en) System and method for producing a hardened and tempered structural member
CN103205551A (zh) 支重轮的热处理加工方法
MX2019002741A (es) Acero de cementacion, metodo de produccion del mismo, y metodo de produccion de partes de engranajes.
WO2007100765A3 (en) Lysozyme-modified probiotic components and uses thereof
AU2003280853A1 (en) Method of increasing strength of cold worked part by ultrasonic shock treatment, and metal product with high fracture toughness and fatigue strength
EP1867704A4 (en) SURFACE TREATMENT METHOD USING A DISCONNECTED COMPOUND, (LUBRICATE) COMPOSITION FOR SURFACE TREATMENT AND SURFACE TREATED ARTICLE
WO2006033752A3 (en) Method for extending the life of thin walled tubing and austempered weld stress relieved thin walled tubing
WO2008081858A1 (ja) 熱間又は温間鍛造用金型の寿命向上方法
SE0301068L (sv) Förfarande för framställning av en konstruktionsdel av metall för ett rullningslager
WO2009100702A8 (de) Verfahren und vorrichtung zur wärmebehandlung eines rohrkörpers für ein förderrohr sowie verfahren zur herstellung eines förderrohrs
EP1264902A3 (en) Welded steel pipe for hydroforming and method for making the same
CN104831023A (zh) 一种机床滚珠丝杆的热处理工艺
WO2019198985A3 (ko) 산화그래핀 제조방법
WO2006063315A3 (en) Method and process for thermochemical treatment of high-strength, high-toughness alloys

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08704039

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 12525956

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 2008704039

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE