WO2010002240A1 - Procédé de traitement thermique pour composant de bague métallique pour courroie d'entraînement - Google Patents

Procédé de traitement thermique pour composant de bague métallique pour courroie d'entraînement Download PDF

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Publication number
WO2010002240A1
WO2010002240A1 PCT/NL2008/050432 NL2008050432W WO2010002240A1 WO 2010002240 A1 WO2010002240 A1 WO 2010002240A1 NL 2008050432 W NL2008050432 W NL 2008050432W WO 2010002240 A1 WO2010002240 A1 WO 2010002240A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
viii
heat treatment
oxidising
treatment process
Prior art date
Application number
PCT/NL2008/050432
Other languages
English (en)
Inventor
Bert Pennings
Oleg Alexandrovich Alexandrov
Michel Joseph Marie Derks
Minh-Duc Tran
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to CN200880130144.1A priority Critical patent/CN102239348B/zh
Priority to JP2011516164A priority patent/JP5174963B2/ja
Priority to PCT/NL2008/050432 priority patent/WO2010002240A1/fr
Priority to KR1020117002211A priority patent/KR101546561B1/ko
Publication of WO2010002240A1 publication Critical patent/WO2010002240A1/fr

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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G5/00—V-belts, i.e. belts of tapered cross-section
    • F16G5/16—V-belts, i.e. belts of tapered cross-section consisting of several parts
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • 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
    • C21D6/001—Heat treatment of ferrous alloys containing Ni
    • 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
    • C21D6/007—Heat treatment of ferrous alloys containing Co
    • 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
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • 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
    • C23C8/10—Oxidising
    • 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

Definitions

  • the present invention relates to a manufacturing method for a metal ring to be used in a drive belt, more in particular a heat treatment process part thereof as defined by the preamble of the following claim 1 .
  • the drive belt is typically used as the means for power transmission between two adjustable pulleys of the well-known continuously variable transmission that is mainly applied in motor vehicles.
  • EP-A-1 403 551 is composed of a multitude of relatively thin transverse metal elements that are slideably incorporated on two laminated endless tensile means that are each composed of a set of mutually nested flat metal rings, alternatively denoted bands or hoops.
  • Such rings are produced from a precipitation hardening steel, such as a maraging steel, that combines a/o the properties of great tensile strength and good resistance against tensile stress and bending fatigue with a relatively favourable possibility to process the steel from sheet material towards the desired shape and material characteristics of the end-product rings, which, preferably, should not vary along the circumference of the rings.
  • the present invention in particular relates to the range of maraging steel alloys having a basic composition with 17 to 19 mass-% nickel, 4 to 6 mass-% molybdenum, 8 to 18 mass-% cobalt and with balance iron, possibly with some, i.e. less than 1 mass-%, titanium added.
  • These desired material characteristics comprise a fair hardness of the ring core material for combining the properties of a great tensile strength together with sufficient elasticity to allow longitudinal bending of the ring and an extremely hard outer surface layer of the ring to provide wear resistance. Additionally, the outer surface layer is provided with a residual compressive stress to provide a high resistance against metal fatigue, which is a significant feature of the rings because of the numerous numbers of load and bending cycles the rings are subjected to during the service lifetime of the belt.
  • the basics of the known manufacturing method for such rings have become well known in the art and are, for example, described in the Japanese publication JP- A-2004-043962.
  • the rings are formed out of a sheet base material, which is bent and welded into a cylindrical shape, or tube, which is heat treated, i.e. annealed, to restore the original material properties, i.e. to largely remove changes therein that were introduced by the bending and welding.
  • the tube is then cut into a number of hoops, which are subsequently rolled and elongated to a required thickness, which is typically about 0.185 mm in the end product. After rolling the hoops are usually referred to as rings or bands.
  • the rings are subjected to a further annealing step to remove the internal stresses introduced during rolling. Thereafter, the rings are calibrated, i.e. they are mounted around two rotating rollers and stretched to a predefined circumference length.
  • the rings are subjected to a heat treatment process that includes three separate steps, wherein in each step a processing gas of different composition is applied.
  • a processing gas of different composition is applied.
  • the rings are precipitation hardened, i.e. aged, in an atmosphere predominantly composed of nitrogen (N 2 )
  • the rings are oxidised in an atmosphere containing a substantial amount of oxygen (O 2 ), e.g. ambient air
  • the rings are nitrided, i.e. case hardened, in an atmosphere containing a substantial amount of Ammonia (NH 3 ).
  • a common, long standing desire and general aim in the further development and/or advancement of the above ring manufacturing method has been to enhance the effectiveness thereof, not only in terms of improving the material properties realised in the end-product ring in view of the drive belt application thereof, but also in terms of providing such favourable material properties in the most cost effective way possible.
  • the present invention in particular this latter aspect of cost effectiveness can be improved upon in the known ring manufacturing method.
  • the present invention provides for a novel specification of the heat treatment process part of the overall manufacturing method for the metal ring component of a drive belt.
  • the above known heat treatment process may be significantly improved and even simplified by increasing the intensity of the step of ring oxidising, while simultaneously shortening the preceding step of ring aging.
  • the ring oxidising intensity is determined by either one or both of the temperature applied therein and the duration thereof.
  • the advantage of the novel process specification according to the invention i.e. the freedom to shift between the said respective durations, is that the processing capacities of the respective heat treatment process steps may be more freely and possibly even equally distributed such that, as a result, a favourably more efficient and cost effective overall ring manufacturing method may be realised.
  • These respective capacities are, for example, determined by the size of the oven or oven chamber that is respectively required for each step in the manufacturing chain or line.
  • the known separate step of ring aging which preceded the step of ring oxidising in the conventional heat treatment process of the drive belt ring component, is omitted altogether.
  • such would substantially improve the cost effectiveness of the overall ring manufacturing method, because the separate aging oven or aging chamber is not required anymore.
  • a similar result may also be obtained by increasing the duration of the step of ring nitriding while simultaneously decreasing the ammonia concentration in the processing gas, i.e. by providing that the aging process and the nitriding process may be completed in the same time, i.e.
  • such additional criterion entails that in the heat treatment process after the step of oxidising has been be completed and before the step of ring nitriding is commenced the (core) hardness value of the intermediate- product ring amounts to 400 HV1.0 or more. More preferably, for additionally reliably avoiding the phenomenon of over-aging, such (core) hardness value of the intermediate-product ring amounts to 500 HV1 .0 at most.
  • Figure 1 is a schematic illustration of the drive belt the present invention relates to and of the transmission in which such belt is applied.
  • Figure 2 is an illustration of the manner in which a laminated tensile means and a transverse element are mutually oriented within the drive belt.
  • Figure 3 figuratively represents the known manufacturing method of a metal ring applied in the endless tensile means of the drive belt.
  • FIG. 4 illustrates the heat treatment process part of the above manufacturing method that is optimised in accordance with the invention.
  • Figure 5 illustrates a novel setup of the said heat treatment process part according to the invention.
  • Figure 6 is photograph of an enlarged cross section of the ring, which ring incorporates a nitrided surface layer that suffers from the phenomenon of discontinuous precipitation.
  • FIG. 1 shows schematically a continuous variable transmission (CVT) with a drive belt 1 wrapped around two pulleys 1 and 2, which belt 1 is made up of a laminated tensile means 2 in the form two sets of mutually nested endless thin and flat metal rings 14, alternatively denoted bands 14 and an essentially continuous array of transverse elements 3, alternatively denoted transverse elements 3, which are mounted along the circumference of the tensile means 2 and which may freely slide there along.
  • CVT continuous variable transmission
  • Figure 2 depicts a front view of a transverse element 3 and a cross section of the laminated tensile means 2.
  • the transverse element 3 laterally shows a side face 6 by which it rests against the conical face of one sheave of either a drive or a driven pulley.
  • the rings 14 of the tensile means 2 are produced of high quality steel, e.g. maraging steel.
  • a typical thickness of the rings 14 ranges from 0.15 to 0.25 mm, a typical width thereof ranges from 8 to 35 mm and a typical circumference length thereof ranges from 500 to 1000 mm.
  • FIG 3 illustrates the presently relevant part of the known manufacturing method for the above described belt 1 , in particular for the rings 14 thereof, as is practised since the early years of metal push belt production.
  • a sheet of base material 1 1 is bent into a cylindrical shape, whereby the sheet ends 12 that meet each other are welded together in a second process step Il to form a tube 13.
  • a third step III of the process the tube 13 is annealed.
  • the tube 13 is cut into a number of hoops 14, which are subsequently -process step five V- rolled and elongated to a thickness. After rolling the hoops 14 are usually referred to as rings 14 or bands 14.
  • the rings 14 are subjected to a further annealing process step Vl to remove the internal stresses introduced during rolling. Thereafter, in a seventh process step VII, the rings 14 are calibrated, i.e. they are mounted around two rotating rollers and stretched to a predefined circumference length. In this seventh process step VII, also an internal stress distribution is imposed on the rings 14, which defines the so-called curling radius of the respective ring 14.
  • the rings 14 are heat treated in three separate steps, wherein in each step a processing gas of different composition is applied.
  • the rings 14 are precipitation hardened, i.e. aged, (step VIII-A) in an atmosphere predominantly composed of nitrogen (N 2 )
  • the rings are oxidised (step VIII-O) in ambient air, i.e. an atmosphere containing a substantial amount of oxygen (O 2 )
  • the rings are nitrided, i.e. case hardened, (step VIII-N) in an atmosphere containing a substantial amount of Ammonia (NH 3 ).
  • the rings 14 are heated to a temperature of 430 and 480 0 C for several hours, which process duration is known to depend mainly on the composition of the ring material used.
  • increasing the mass-% content of cobalt (Co) in the basic maraging steel alloy composition is known to significantly speed up the nucleating (i.e. forming) of the iron-molybdenum (Fe x MOy) and nickel-molybdenum (Ni x Mo y ) precipitates.
  • a process duration of less than 2 hours, even down to 45 to 90 minutes can be realised by including at least 8, up to 18 mass-% cobalt in the maraging steel alloy.
  • the hardness of the ring material increases as the intermetallic precipitates continue to form and grow in the steel matrix. It is also known to speed op the ring ageing step VIII-A by applying a process temperature of up to 500 °C.
  • the rings 14 are heated to a temperature of between 330 and 450 °C for 5 to 15 minutes.
  • the surface of the ring 14 is cleaned and prepared or "activated" for the nitriding process.
  • the rings 14 are heated to a temperature of between 420 and 500 0 C for 35 to 80 minutes, which process duration is known to depend mainly on the process temperature.
  • the rings 14 are provided with a nitrided diffusion zone or surface layer of typically 25 to 35 microns of extreme hardness and provided with a considerable compressive stress.
  • the tensile means 2 is formed by nesting a number of purposely selected rings 14, i.e. concentrically placing the rings 14 one around the other, as is also indicated in figure 3, whereby only a small positive or negative play is allowed between the adjacent rings 14 of the tensile means 2.
  • the above known heat treatment process may be significantly improved by increasing the duration and/or the temperature of the ring oxidising step VIII-O, whereby the duration of the preceding ring aging step VIII-N may be decreased considerably as required by the maraging steel alloy composition of the rings 14.
  • the rings 14 are oxidised (process step VIII-O) at a temperature of more than 450 °C and/or for 15 minutes or more.
  • the preceding ring aging step VIII-A is thereby favourably reduced to 30 minutes or less.
  • the rings 14 are oxidised (process step VIII-O) at a temperature of between 400 and 575 0 C for 20 to 90 minutes.
  • the preceding, separate process step of ring aging VIII-A may in this latter case be completely and favourably omitted from the heat treatment process of the drive belt ring component, as is schematically illustrated in figure 5.
  • the rings 14 are preferably oxidised (process step VIII-O) at a temperature of between 440 and 480 0 C for 30 to 60 minutes.
  • Figure 6 is a photograph of an enlarged cross-section of a ring 14 that incorporates the nitrided surface layer NSL. It can be seen therein that near the outer surface of the ring 14 the material has a relatively course structure that was related to the said discontinuous precipitation DP, meaning that locally the alloying elements of the maraging steel, such as the molybdenum, have formed nitrides on the grain boundaries, instead of the desired intermetallic compounds.
  • the process step of ring nitriding VIII-N should preferably only be performed, i.e. started, after the (core) hardness value of the intermediate-product ring 14 has reached a value of at least 400 HV1.0 in the preceding ring oxidising step VIII-O, in which case the said discontinuous precipitation DP does not occur.
  • the said (core) hardness value of the intermediate-product ring should preferably not exceed a value of 500 HV1.0 to avoid the said over-aging in the subsequent ring nitriding step VIII-N.

Abstract

L'invention porte sur un procédé de traitement thermique dans un procédé de fabrication d'une bague métallique (14) destinée à être utilisée dans une courroie d'entraînement (1), lequel procédé de traitement thermique comprend au moins une étape de traitement (VIII-O) d'oxydation de la bague (14) dans une atmosphère contenant de l'oxygène, et une étape de traitement ultérieure (VIII-N) de nitruration de la bague (14) dans une atmosphère contenant de l'ammoniac, laquelle étape de traitement (VIII-O) d'oxydation de la bague (14) dans l'atmosphère contenant de l'oxygène est effectuée à une température supérieure à 450°C et/ou pendant plusieurs minutes ou davantage.
PCT/NL2008/050432 2008-06-30 2008-06-30 Procédé de traitement thermique pour composant de bague métallique pour courroie d'entraînement WO2010002240A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN200880130144.1A CN102239348B (zh) 2008-06-30 2008-06-30 传动带金属环部件的热处理方法
JP2011516164A JP5174963B2 (ja) 2008-06-30 2008-06-30 駆動ベルトの金属リングコンポーネントのための熱処理プロセス
PCT/NL2008/050432 WO2010002240A1 (fr) 2008-06-30 2008-06-30 Procédé de traitement thermique pour composant de bague métallique pour courroie d'entraînement
KR1020117002211A KR101546561B1 (ko) 2008-06-30 2008-06-30 구동 벨트용 금속 링 구성요소에 대한 열처리 방법

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NL2008/050432 WO2010002240A1 (fr) 2008-06-30 2008-06-30 Procédé de traitement thermique pour composant de bague métallique pour courroie d'entraînement

Publications (1)

Publication Number Publication Date
WO2010002240A1 true WO2010002240A1 (fr) 2010-01-07

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PCT/NL2008/050432 WO2010002240A1 (fr) 2008-06-30 2008-06-30 Procédé de traitement thermique pour composant de bague métallique pour courroie d'entraînement

Country Status (4)

Country Link
JP (1) JP5174963B2 (fr)
KR (1) KR101546561B1 (fr)
CN (1) CN102239348B (fr)
WO (1) WO2010002240A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012083975A1 (fr) * 2010-12-20 2012-06-28 Robert Bosch G.M.B.H. Procédé de traitement thermique pour un procédé de fabrication d'un composant annulaire métallique de courroie d'entraînement
WO2012089228A1 (fr) * 2010-12-30 2012-07-05 Robert Bosch G.M.B.H. Procédé et dispositif permettant de traiter un anneau métallique, bande métallique annulaire formée de la sorte et courroie de transmission utilisant la bande métallique annulaire

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013081451A1 (fr) * 2011-11-30 2013-06-06 Robert Bosch Gmbh Procédé de traitement thermique dans un procédé de fabrication d'un composant annulaire métallique de courroie d'entraînement
CN102517640A (zh) * 2011-12-12 2012-06-27 大连理工大学 一种原位生长金属氧化物、金属氮化物、金属碳化物纳米线的方法
JP5817921B2 (ja) * 2012-03-28 2015-11-18 トヨタ自動車株式会社 無端金属リングの製造方法及び製造装置
JP5973244B2 (ja) * 2012-06-08 2016-08-23 トヨタ自動車株式会社 無端金属リングの製造方法
NL1040571C2 (en) * 2013-12-24 2015-06-26 Bosch Gmbh Robert Metal ring component for a drive belt for a continuously variable transmission.
CN106591748B (zh) * 2016-12-15 2017-12-01 新昌县大市聚镇海房机械厂 一种铝箔胶带热处理装置
JP2021127477A (ja) * 2020-02-12 2021-09-02 トヨタ自動車株式会社 金属リング積層体の製造方法

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JP2004043962A (ja) * 2002-05-14 2004-02-12 Nissan Motor Co Ltd マルエージング鋼の表面硬化処理方法およびその方法によって製造されたベルト式無段変速機用のベルト
JP2005330565A (ja) * 2004-05-21 2005-12-02 Nippon Parkerizing Co Ltd マルエージング鋼の表面硬化処理方法
WO2006054885A1 (fr) * 2004-11-17 2006-05-26 Robert Bosch Gmbh Courroie de poussee et son procede de fabrication
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WO2007133062A1 (fr) * 2006-05-16 2007-11-22 Robert Bosch Gmbh Procédé de fabrication d'un ensemble stratifié de bagues métalliques pour une courroie de poussée
WO2007145502A1 (fr) * 2006-06-12 2007-12-21 Robert Bosch Gmbh Procédé de fabrication de fins anneaux en métal

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JPS62235463A (ja) * 1986-04-04 1987-10-15 Toyota Central Res & Dev Lab Inc 高合金鋼製部材のガス窒化方法
JP2004043962A (ja) * 2002-05-14 2004-02-12 Nissan Motor Co Ltd マルエージング鋼の表面硬化処理方法およびその方法によって製造されたベルト式無段変速機用のベルト
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WO2006054885A1 (fr) * 2004-11-17 2006-05-26 Robert Bosch Gmbh Courroie de poussee et son procede de fabrication
JP2006328486A (ja) * 2005-05-26 2006-12-07 Daido Steel Co Ltd 薄帯用鋼および薄帯
WO2007133062A1 (fr) * 2006-05-16 2007-11-22 Robert Bosch Gmbh Procédé de fabrication d'un ensemble stratifié de bagues métalliques pour une courroie de poussée
WO2007145502A1 (fr) * 2006-06-12 2007-12-21 Robert Bosch Gmbh Procédé de fabrication de fins anneaux en métal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012083975A1 (fr) * 2010-12-20 2012-06-28 Robert Bosch G.M.B.H. Procédé de traitement thermique pour un procédé de fabrication d'un composant annulaire métallique de courroie d'entraînement
CN103339267A (zh) * 2010-12-20 2013-10-02 罗伯特·博世有限公司 用于传动带金属环构件的生产方法的热处理方法
WO2012089228A1 (fr) * 2010-12-30 2012-07-05 Robert Bosch G.M.B.H. Procédé et dispositif permettant de traiter un anneau métallique, bande métallique annulaire formée de la sorte et courroie de transmission utilisant la bande métallique annulaire

Also Published As

Publication number Publication date
CN102239348B (zh) 2014-05-07
KR101546561B1 (ko) 2015-08-21
JP2011526963A (ja) 2011-10-20
CN102239348A (zh) 2011-11-09
JP5174963B2 (ja) 2013-04-03
KR20110020948A (ko) 2011-03-03

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