WO2020035487A1 - Procédé pour la fabrication de pièces à usiner durcies pour composant d'engrenage et engrenage - Google Patents

Procédé pour la fabrication de pièces à usiner durcies pour composant d'engrenage et engrenage Download PDF

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Publication number
WO2020035487A1
WO2020035487A1 PCT/EP2019/071704 EP2019071704W WO2020035487A1 WO 2020035487 A1 WO2020035487 A1 WO 2020035487A1 EP 2019071704 W EP2019071704 W EP 2019071704W WO 2020035487 A1 WO2020035487 A1 WO 2020035487A1
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WO
WIPO (PCT)
Prior art keywords
workpiece
protective layer
gear
oxide
hardening
Prior art date
Application number
PCT/EP2019/071704
Other languages
German (de)
English (en)
Inventor
Malte Blomeyer
Manfred Siefert
Original Assignee
Flender 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 Flender Gmbh filed Critical Flender Gmbh
Publication of WO2020035487A1 publication Critical patent/WO2020035487A1/fr

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Classifications

    • 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
    • C23C8/12—Oxidising using elemental oxygen or ozone
    • C23C8/14—Oxidising 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
    • C23C8/28—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 more than one element being applied in one step

Definitions

  • WO 2010/097300 A1 discloses a method for coating a metallic surface with a protective layer. A nanoscale powder, a porous ceramic powder and a solvent are applied. This coating protects the metallic surface from chemical attacks in a carburizing atmosphere.
  • Hardened components are used in numerous technical fields, the manufacture of which requires considerable effort. Furthermore, there is a requirement in many technical areas to provide increasingly powerful components more cost-effectively and faster. This is especially true in the field of gear technology, in which highly stressable components are required. There is a need for a manufacturing process for hardened transmission components that is quick, reliable, cost-effective and easy to implement.
  • the invention is based on the object of providing a production method which offers an improvement in at least one of the aspects outlined above.
  • the task is solved by the method according to the invention, which is designed to produce a transmission component.
  • the method includes hardening the workpiece, which was previously machined, for example, as part of a so-called soft machining.
  • the method according to the invention includes a first one
  • the gear component is to be made from the workpiece.
  • a process environment is provided by setting a process temperature in the hardening furnace.
  • the workpiece is placed in the hardening furnace and heated by the process temperature there. By heating the workpiece, a workpiece temperature is adjusted to the process temperature.
  • a protective layer is produced on at least one area of a surface of the workpiece.
  • the protective layer serves to minimize or avoid an undesirable chemical reaction of the surface of the workpiece with the process environment, for example a so-called edge oxidation of the workpiece.
  • the more extensive an oxidation is formed the greater the weakening of the machined workpiece. In particular, this can be an intergranular edge oxidation.
  • the protective layer is formed on the basis of a substance which is present as an alloy element in the workpiece.
  • the protective layer lies on the surface of the workpiece, so that a base material of the workpiece is shielded from the process environment by the protective layer.
  • the alloy element present in the base material is converted in the area of the surface of the workpiece into a material that forms the protective layer on the surface.
  • the workpiece that is
  • Base material to choose only a suitable material in which the corresponding alloy element is present with an at least sufficient proportion, that is to say an at least sufficient concentration.
  • the protective layer is thus automatically formed on the entire surface of the workpiece. Alloys are typically largely homogeneous, so that the protective layer on the entire surface of the workpiece essentially is evenly trained. The fact that further handling steps, for example by a worker, are unnecessary, ensures a high degree of process reliability. Furthermore, the protective layer is thereby formed from inside the workpiece.
  • the protective layer can also be formed from a material which is present in a coating.
  • the coating is applied to the workpiece when the workpiece is made available for hardening in the first step.
  • a particularly suitable material for forming the protective layer can be selected.
  • a particularly suitable substance is, for example, a substance that can be converted into a protective layer that has a high chemical inertness and thus offers an increased protective effect for the surface of the workpiece. Overall, the number of materials that can be used as the base material of the workpiece is increased for the desired gear component.
  • a protective layer which is made from an alloy element in the base material of the workpiece a further increased protective effect can be achieved.
  • the material for forming the protective layer can be designed to form an oxide on the surface of the workpiece when the process temperature is present.
  • the oxide can also be formed at a temperature below the process temperature.
  • oxides are chemically inert, which prevents undesired further chemical reactions with substances from the process environment and / or the workpiece.
  • the material for forming the protective layer can be diffusible in the workpiece at the process temperature in the process.
  • the protective layer When the protective layer is formed on the basis of an alloy element in the workpiece, a diffusion current of the corresponding alloy element from the interior of the workpiece on its surface is thus produced in the method. As a result, an educt is automatically provided on the surface with the alloying element in sufficient quantity, which is required to form the protective layer. The diffusion current is also reduced when the formation of the protective layer occurs in a saturation region.
  • the claimed process is thus self-regulating, which in turn allows the process to be implemented reliably and reliably.
  • a process environment in the hardening furnace in which the workpiece is carburized there can be a process environment in the hardening furnace in which the workpiece is carburized.
  • a process temperature at which carbon from the process environment is embedded in the surface of the workpiece thus increasing the hardness of the workpiece.
  • a protective layer can also be formed. Edge oxidations are usually expected at correspondingly high process temperatures, which also allow carburizing.
  • the protective layer is suitable to withstand the corresponding process temperatures and offers reliable protection against further edge oxidation.
  • the alloy element in the workpiece from which the protective layer is to be formed is chromium, zirconium, titanium, nickel, zinc, aluminum, or lead.
  • the oxides of these substances form a chemically inert protective layer on the surface of the workpiece, which offers a particularly high degree of protection against edge oxidation.
  • chrome, zirconium, titanium, zinc and aluminum are tried and tested alloying elements numerous types of steel.
  • suitable materials for the workpiece are readily available.
  • chromium is a tried and tested substance as a substance for forming a protective layer, for example in the context of a so-called chromium passivation.
  • chrome is readily diffusible in the workpiece at the process temperature in the hardening furnace, which accelerates the formation of the protective layer. This further minimizes the formation of edge oxidations on the workpiece.
  • the application of the coating can be produced by alitizing, by chroming or by applying a paste.
  • Aluminum can be provided by alitizing as a substance that is suitable for forming a passivating protective layer, namely an aluminum oxide layer, on the surface of the workpiece.
  • Chromium provides chromium, which can form a passivating chromium oxide layer.
  • any substance, in particular titanium or zirconium can be provided in a paste, which is suitable for forming a passivating protective layer when the process temperature is present.
  • a combination of several such substances can also be provided by a paste. The claimed method can thus be easily adapted to a large number of materials from which the workpiece can be produced.
  • the protective layer which is to be produced during the third method step may have chromium oxide, aluminum oxide, zirconium oxide, titanium oxide, nickel oxide, zinc oxide and / or lead oxide. Such oxides provide an effective passivation for the workpiece on the surface.
  • the second and / or third step takes place in a gas atmosphere.
  • a gas atmosphere This can be, for example, a so-called carburizing atmosphere, which contains gaseous carbon compounds to store carbon in the surface of the plant.
  • Piece includes.
  • a carburizing atmosphere can be created, for example, by flooding the hardening furnace with nitrogen in order to minimize the oxygen content.
  • the gas atmosphere can also be designed as a protective gas atmosphere. Due to the protective layer, the claimed process minimizes the occurrence of edge oxidation even in a gas atmosphere.
  • Complex carburizing in a vacuum can thus be replaced by the claimed method while the quality of the treated workpiece is at least constant. This accelerates the production of the gear components and at the same time maintains or increases the quality of the treated workpieces. As a result, the desired gearbox components can be manufactured more cost-effectively overall.
  • the workpiece can be made of a steel or a steel alloy.
  • Steels or steel alloys are available in a wide range of properties and can be processed reliably, i.e. reliably.
  • steel or steel alloys are suitable to serve as the base material for workpieces, on which a protective layer is to be formed, which has a passivating effect.
  • steel or steel alloy offers advantageous strength, which is essential for transmission components.
  • the steel or the steel alloy can be made of low alloy, that is to say it can contain up to 5% alloy.
  • the alloy portion is to be understood as a mass portion.
  • Such steels or steel alloys are also referred to as low-alloy steels.
  • the third method step in which the protective layer is formed can be carried out for the duration of an adjustable process duration.
  • the process duration can be selected depending on a number of sizes. In particular, the process duration is selected depending on the process temperature. The lower the process temperature, the longer it takes until a sufficient protective layer is formed by diffusion from inside the workpiece. det.
  • the duration of the process can be set such that saturation occurs during the third method step when the protective layer is formed.
  • the process duration can also be adjusted depending on the material of the workpiece and / or the applied coating.
  • the process duration can also include a so-called carburizing phase, in which the formation of the protective layer is completed and only carburizing of the workpiece follows.
  • the process duration can be set, for example, by an algorithm or a table in a control unit of the hardening furnace.
  • the process duration can also be adjustable by user input.
  • the process duration can also be set as a function of a proportion of the alloy element that is provided for forming the protective layer.
  • the proportion is to be understood as the concentration of the corresponding alloying element in the material of the workpiece, for example.
  • the process duration can also be selected as a function of a diffusion speed of the corresponding alloy element in the workpiece. The higher the diffusion speed of the alloy element in the workpiece, the faster the protective layer is formed. The claimed process is thus easily adaptable to the material used.
  • a partial pressure of oxygen in the hardening furnace can be reduced compared to an ambient atmosphere. Accordingly, there is a reduced supply of oxygen in the hardening furnace, which further inhibits the formation of edge oxidation. This further increases the effect of the claimed method, so that the material used for the transmission components can be used even more.
  • the underlying task is also solved by a workpiece according to the invention, which is suitable for the production, for example, of a gear component.
  • the workpiece can also be suitable for producing a compressor blade or a turbine blade in a turbomachine.
  • the workpiece is hardened and is suitable for immediate hard machining.
  • the workpiece thus represents an intermediate product in the manufacture of a transmission component or a compressor or turbine blade.
  • the workpiece is processed in a method according to one of the embodiments outlined above.
  • the workpiece according to the invention has at most a minimum of edge oxidations, which reduce the strength of the workpiece.
  • the workpiece according to the invention has completed the treatment by the method described above and is directly suitable for quenching, tempering and / or heating, which is followed by machining hard machining. Another processing step between hardening and hard machining, such as shot peening, is unnecessary.
  • the workpiece according to the invention considerably accelerates and simplifies the manufacture of a transmission component, which results in increased economic efficiency. The same advantages are also achieved in the manufacture of a compressor blade or a turbine blade of a turbomachine.
  • the Getriebekom component is designed as a spur gear, ring gear, planet gear, or as a sun gear for a planetary gear or a spur gear.
  • the gear component is made from a workpiece, which is designed according to a method according to one of the above-described embodiments. Accordingly, the gear component is made from a workpiece as claimed above.
  • the gear component has at most a minimum of edge oxidation, by means of which the strength of the gear component is reduced.
  • the gear component can be dimensioned more compactly as known gear components that are subject to mechanical mechanical stresses. Accordingly, the stressed gear component offers increased material utilization and increased power density.
  • the transmission can, for example, be designed as a planetary gear or spur gear and has a housing in which a plurality of Ge gear components is excluded. At least one of the gear components is designed in accordance with the solution described above, that is to say it is produced from a workpiece which is treated by a claimed method.
  • the at least one gear component which is machined with the claimed method, improves the material utilization, which in turn allows a more compact dimensioning of the gear component.
  • Such improved transmission components make it possible to manufacture the transmissions according to the invention more compactly.
  • FIG. 1 shows a schematic representation of a first embodiment of the claimed method
  • FIG. 3 shows a flowchart of a third embodiment of the claimed method
  • 4 shows a flowchart of a fourth embodiment of the claimed method
  • FIG. 5 shows a schematic representation of an embodiment of a claimed transmission with a claimed transmission component
  • FIG. 6 shows a schematic illustration of a further embodiment of a claimed transmission with a claimed transmission component.
  • FIG. 1 schematically shows a first embodiment of a claimed method 100, in which a workpiece 10 is acted upon.
  • 1 shows a section of the workpiece 10, which is to be further processed into a gear component 40, during a third method step 130.
  • the workpiece 10 is made of a material 14 which serves as the basic material 23. Due to the shape of the workpiece 10, it has a certain volume 11 overall.
  • the workpiece 10 shown in FIG. 1 is to be further processed into a gear component 40.
  • the base material 23 from which the workpiece 10 is made is a steel alloy and has a plurality of alloy elements 14, which are indicated by points in FIG.
  • One of the alloy elements 14 is a substance 15, from which a protective layer 16 is to be formed on the surface 12 of the workpiece 10 in the third step 130.
  • the material 15 is chrome, which is used as an alloy element 14 in the
  • Base material 23 is present.
  • the workpiece 10 is located in a hardening furnace 30 in which a gas atmosphere 20 is present.
  • the gas atmosphere 20 has a gaseous carbon compound which is suitable for storing carbon 22 in the area 12 of the workpiece 10.
  • a process environment 26 is defined by the gas atmosphere 20 and a present process temperature 25, under which a workpiece temperature 29 of the process temperature 25 changes. fits. Due to the rising workpiece temperature 29, the material 15 present as alloying element 14 becomes diffusible to form the protective layer 16 in the base material 23.
  • a diffusion 17 of the material 15 is essentially brought about in the direction of the surface 12. This results in an enrichment of the substance 15 on the surface 12, where the process environment 26 is set.
  • the substance 15 forms an oxide 21 by the action of the process environment Pro, namely a chromium oxide.
  • the oxide 21 essentially occupies the surface 12 and thus forms the protective layer 16.
  • the protective layer 16 in turn has a chemically passivating effect, so that a reaction on the surface 12 with oxygen 33 in the process environment 26 is inhibited or avoided. Furthermore, the partial pressure 43 of the oxygen 33 is reduced to an ambient atmosphere. If in the third step 130 an essentially continuous protective layer 16 is produced on the surface 12, only carbon 22 is stored in the surface 12, that is to say only the so-called carburizing 31.
  • the third method step 130 is for an adjustable process duration 32 performed, which is set depending on the substance 15 and the process temperature 25. The lower the substance 15 and the process temperature 25, the longer it takes until an essentially continuous protective layer 16 is formed. In the third step 130, the formation of edge oxidations 19 is reduced or prevented, which reduce the strength of the workpiece 10. In the embodiment according to FIG. 1, the protective layer 16 is essentially formed from the inside of the workpiece 10.
  • FIG 2 schematically shows a second embodiment of a claimed method 100, in which a workpiece 10 is acted upon.
  • 2 shows a section of the workpiece 10, which is to be further processed into a transmission component 40, during a third method step 130.
  • the workpiece 10 is made of a material 14 which serves as the basic material 23. Due to the shape of the workpiece 10, it has a certain volume 11 overall.
  • the present in FIG 2 The workpiece 10 is further processed to a gear component 40.
  • the base material 23 from which the workpiece 10 is made is a steel alloy.
  • a coating 27 is applied, which has a substance 15 which is suitable for forming a protective layer 16.
  • the substance 15 is chromium, which is added to the coating 27, which is designed as a paste.
  • the workpiece 10 is located during the third procedural step 130 in a hardening furnace 30 in which a gas atmosphere 20 is present.
  • the gas atmosphere 20 has a gaseous carbon compound which is suitable for storing 22 carbon 22 in the area 12 of the workpiece Be.
  • a process environment 26 is defined by the gas atmosphere 20 and a present process temperature 25, under which a workpiece temperature 29 adapts to the process temperature 25. Due to the rising workpiece temperature 29, the substance 15 present in the coating 27 reacts with the oxygen 33 from the process environment 26 to form the oxide 21 and forms the protective layer 16 on the base material 23.
  • the oxide 21 occupies the surface 12 in the area of the coating 27 over a large area and there forms the protective layer 16.
  • the protective layer 16 in turn has a chemically passivating effect, so that a reaction of the surface 12 with oxygen 33 in the process environment 26 is inhibited or avoided. Furthermore, the partial pressure 43 of the oxygen 33 is reduced with respect to an ambient atmosphere. If in the third step 130 an essentially continuous protective layer 16 is produced on the surface 12, only carbon 22 is deposited in the surface 12, that is to say only the so-called carburizing 31. The carbon 22 is capable of carburizing 31st to penetrate the coating 27 and the protective layer 16. In the third step 130, the formation of edge oxidations 19 is reduced or prevented, which reduce the strength of the workpiece 10.
  • the protective layer 16 is essentially on the outside of the Workpiece 10 formed.
  • any suitable substances 15 for forming the protective layer 16 can be provided in a wide range of amounts or concentrations.
  • An intensity of the diffusion 17 from the coating 27 into the surface 12 depends on an existing process environment 25, in particular the process temperature 26, and the concentration of the substance 15 in the coating 27.
  • FIG 3 is schematically in three corresponding Diagram men 50, each having a time axis 52 in the horizontal direction and a size axis 54 in the vertical direction, shows an embodiment of the claimed method 100 ge.
  • the workpiece temperature 29 present on a workpiece 10 is shown on the size axis 54, which results from the action of a process environment 26 to which the workpiece 10 is exposed.
  • the diagrams 50 assume a situation in the method 100 in which the first and second method steps 110, 120, that is to say the provision of the workpiece 10, the hardening furnace 30 and the production of a process temperature 25 in the hardening furnace 30, have been completed.
  • the subsequent third method step 130 has a start phase 35 in which the workpiece temperature 29 rises and approaches the process temperature 25.
  • the starting phase 35 ends when a passivation temperature 28 is reached, at which a substance 15, which is present in the workpiece 10 as an alloying element 14, forms an oxide layer on a surface 12 of the workpiece 10, which serves as a protective layer 16.
  • a diffusion speed 42 is shown on the size axis 54.
  • the diffusion rate 42 of the diffusion 17 of the alloy element 14 for forming the protective layer 16 is essentially during the starting phase 35. Chen zero.
  • the protective layer 16, as shown in the lower diagram 50 has a thickness 13 of essentially zero.
  • the start phase 35 is followed by an acceleration phase 36 in which the workpiece temperature 29 continues to rise.
  • the diffusion speed 42 increases and reaches its maximum increase at the end of the acceleration phase 36, which is shown in FIG. 3 by the tangent 44.
  • the thickness 13 of the protective layer 16 has only a slight first increase 46.
  • a main phase 37 follows, in which, as shown in the upper diagram 50, the workpiece temperature 29 essentially corresponds to the process temperature 25.
  • the diffusion rate 42 of the alloy member 14 in the workpiece 10 remains essentially constant.
  • carburization 31 of the workpiece 10 begins during the main phase 37.
  • a saturation phase 38 in which the workpiece temperature 29 continues to correspond essentially to the process temperature 25.
  • the rate of diffusion 42 drops to essentially zero.
  • the thickness 13 of the protective layer 16 essentially stagnates during the saturation phase 38. In the meantime, the thickness 13 of the protective layer 16 results in a third increase 48, which is less than the first and the second increase 46, 47. At the same time, the carburization 31 continues Work piece 10.
  • the saturation phase 38 is followed by a constant phase 39 in which the thickness 13 of the protective layer 16 remains constant and only a carburization 31 takes place due to the action of the process temperature 25 or the process environment 26.
  • the combined duration of the main phase 37, the saturation phase 38 and the constant phase 39 represents a process duration 32 which is not specified by an algorithm or a table in a forth shown control unit 51 of the hardening furnace 30 an adjustable. Alternatively or in addition, the process duration 32 can also be set by a user input on the control unit 51.
  • a main phase duration 53 which belongs to the process duration 32, depends on the workpiece temperature 29 and the concentration of the substance 15 as an alloy element 14.
  • the method 100 starts from a first step or method step 110, in which a workpiece 10, which is to be further processed into a transmission component 40, is provided. Furthermore, in the first step 110, a hardening furnace 30 is provided, with which the claimed method 110 can essentially be carried out.
  • a second step 120 follows, in which a process temperature 25 is produced for the workpiece 10 in the hardening furnace 30, at which the method 100 is carried out.
  • the process temperature 25 is part of a process environment 26 which is used to carry out carburizing 31 in the third step 130.
  • the process environment 26 also includes the production of a gas atmosphere 20 in which a gaseous carbon compound is present.
  • a is made on a surface 12 of the workpiece 10
  • the protective layer 16 is formed.
  • the protective layer 16 is formed by a substance 15 which is present as an alloy element 14 in the workpiece 10 or in a coating 27 which can be applied to the workpiece 10 in the first step 110.
  • the carburizing 31 of the workpiece 10 also takes place.
  • the third step 130 comprises, analogously to the embodiment according to FIG. 3, a start phase 35, an acceleration phase 36, a main phase 37, a saturation phase 37 and a constant phase 39, in which the protective layer 16 is formed and the carburization 31 takes place.
  • there is a final state 200 of the method 100 in which the workpiece 10 can be processed by starting, starting and / or heating. As a result, the workpiece 10 is ready for hard machining.
  • 5 shows a planetary gear 61 which has a housing 65 in which a ring gear 62, a planet carrier 64 with at least one rotatable planet gear 66 and a sun gear 68 are accommodated.
  • the ring gear 62, the at least one planet gear 66 and the sun gear 68 are designed as gear components 40, which are produced with the inclusion of one of the claimed methods 100.
  • these gear components 40 have an improved quality and can be subjected to higher mechanical stresses than comparable gear components according to the prior art. This allows the planetary gear 61 to be made particularly compact.
  • spur gear 63 which has a housing 65 and, as gear components 40, two spur gears 67 which mesh with one another.
  • the spur gears 67 are also each produced using a method 100 according to one of the claimed embodiments. Due to the improved quality of the transmission components 40, these can be subjected to higher mechanical stress than transmission components known from the prior art.
  • the spur gear 63 can also be constructed in a particularly compact manner.
  • FIG. 7 schematically shows the structure of a bevel gear 70, which has two bevel gears 69 in a housing 65, which mesh with one another.
  • the bevel gears 69 are manufactured with the inclusion of a method 100 according to one of the claimed embodiments.
  • the Ke gelicycles 69 which are gear components 40, can be mechanically stressed higher than known bevel gears.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Heat Treatment Of Articles (AREA)
  • Gears, Cams (AREA)

Abstract

L'invention concerne un procédé (100) pour la fabrication d'un composant d'engrenage (40), qui comprend le durcissement d'une pièce à usiner (10). Le procédé comprend une première étape (110), dans laquelle s'effectue la fourniture d'une pièce à usiner (10) et d'un four de trempe (30). Elle est suivie d'une deuxième étape (120), dans laquelle la température de processus (25) est générée dans le four de trempe (30). Ensuite vient une troisième étape (130), dans laquelle s'effectue la génération d'une couche de protection (16) sur au moins une zone d'une surface (12) de la pièce à usiner (10). Selon l'invention, la couche de protection (16) est réalisée sur la base d'au moins une substance (15) contenue dans la pièce à usiner (10) comme élément d'alliage (14). En variante ou en complément, la couche de protection (16) est formée sur la base d'une substance (15), qui est présente dans un revêtement (27) appliqué sur la pièce à usiner (10) dans l'étape a). L'invention concerne aussi un composant d'engrenage (40), dont la fabrication comprend un mode de réalisation du procédé (100) correspondant. L'invention concerne également un engrenage (60) qui dispose d'un composant d'engrenage (40) correspondant.
PCT/EP2019/071704 2018-08-17 2019-08-13 Procédé pour la fabrication de pièces à usiner durcies pour composant d'engrenage et engrenage WO2020035487A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18189472.6A EP3611289A1 (fr) 2018-08-17 2018-08-17 Procede de fabrication de composants durcies pour boites d'engrenages et boites d'engrenages
EP18189472.6 2018-08-17

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WO2020035487A1 true WO2020035487A1 (fr) 2020-02-20

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885995A (en) * 1973-04-10 1975-05-27 Boeing Co Process for carburizing high alloy steels
EP2103707A1 (fr) * 2008-03-20 2009-09-23 Minebea Co. Ltd. Composant de palier aérospatial
WO2010097300A1 (fr) 2009-02-26 2010-09-02 Basf Se Revêtement de protection pour surfaces métalliques, ainsi que sa fabrication
US20150211621A1 (en) * 2014-01-28 2015-07-30 Ruebig Gesellschaft m.b.H. & Co. KG. Sintered component

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885995A (en) * 1973-04-10 1975-05-27 Boeing Co Process for carburizing high alloy steels
EP2103707A1 (fr) * 2008-03-20 2009-09-23 Minebea Co. Ltd. Composant de palier aérospatial
WO2010097300A1 (fr) 2009-02-26 2010-09-02 Basf Se Revêtement de protection pour surfaces métalliques, ainsi que sa fabrication
US20150211621A1 (en) * 2014-01-28 2015-07-30 Ruebig Gesellschaft m.b.H. & Co. KG. Sintered component

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EP3611289A1 (fr) 2020-02-19

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