EP1925682B1 - Procédé de production de pièces de soupape creuses pour moteurs à combustion ou turbines et pièce ainsi produite - Google Patents

Procédé de production de pièces de soupape creuses pour moteurs à combustion ou turbines et pièce ainsi produite Download PDF

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Publication number
EP1925682B1
EP1925682B1 EP07118021A EP07118021A EP1925682B1 EP 1925682 B1 EP1925682 B1 EP 1925682B1 EP 07118021 A EP07118021 A EP 07118021A EP 07118021 A EP07118021 A EP 07118021A EP 1925682 B1 EP1925682 B1 EP 1925682B1
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EP
European Patent Office
Prior art keywords
process according
carried out
previous
temperature
valve component
Prior art date
Legal status (The legal status 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 status listed.)
Not-in-force
Application number
EP07118021A
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German (de)
English (en)
Other versions
EP1925682A1 (fr
Inventor
Eckhard Aust
Wolfgang Limberg
Ralf Pieplow
Nils Mildner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GKSS Forshungszentrum Geesthacht GmbH
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GKSS Forshungszentrum Geesthacht GmbH
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Publication of EP1925682A1 publication Critical patent/EP1925682A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/008—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of engine cylinder parts or of piston parts other than piston rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/009—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of turbine components other than turbine blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2301/00—Using particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49298—Poppet or I.C. engine valve or valve seat making

Definitions

  • the present invention relates to a method for the production of components for internal combustion engines or turbines, in particular for the production of hollow valve components.
  • valves are moving parts, the drive power to be applied grows exponentially with the weight the oscillating masses, ie the valves. This results in the requirement to further optimize valves in terms of weight without sacrificing mechanical and thermal resistance.
  • Hollow valves with a shaft, a poppet and a valve disc, wherein valve cone and valve disc together form a cavity are, for example, from DE 198 04 053 A1 known. According to the current state, such hollow valves or hollow valve parts are formed either by hot extrusion or compression and forging.
  • the valve cone and valve disc mainly heat-resistant steels such as material no. 1.4882 (X 50 CrMnNiNbN 21 9), 1.4871 (X 53 CrMnNiN 21 9) or 2.4955 (NiFe 25 Cr 20 NbTi).
  • Other materials, in particular titanium-based lightweight materials in powder form can not or not economically be processed into hollow-valve components with the abovementioned processes because of the high reactivity of titanium with respect to oxygen, nitrogen and carbon and the associated embrittlement of the material.
  • the object of the invention is therefore to provide a method for producing hollow valve components such as valve cones or valve plates, with which other materials can be processed economically.
  • the invention also relates to the hollow valve components produced therewith.
  • titanium-based materials can also be economically processed to hollow-valve components in particular with the method according to the invention, thus achieving a further weight saving over known hollow valves.
  • Titanium alloys containing aluminum and / or vanadium as additional constituents are preferably used. These additional alloying ingredients are each preferably contained in an amount of 2 to 10% by weight based on the total weight of the alloy.
  • the binder is preferably selected from the group consisting of: polyamides, polyoxymethylene, polycarbonate, styrene-acrylonitrile copolymer, polyimide, natural waxes and oils, thermosets, cyanates, polypropylene, polyacetate, polyethylene, ethylene-vinyl acetate, polyvinyl alcohol, polyvinyl chloride, polystyrene, Polymethyl methacrylate, anilines, mineral oils, water, agar, glycerin, polyvinyl butyryl, polybutyl methacrylate, cellulose, oleic acid, phthalates, paraffin waxes, carnauba wax, ammonium polyacrylate, diglyceride stearate and oleate, glyceryl monostearate, isopropyl titanate, lithium stearate, monoglycerides, formaldehyde, octyl acid phosphate, olefin sulfonates, phosphate
  • the mixing in the kneader is preferably carried out at a temperature of 50 to 250 ° C, more preferably 90 to 150 ° C.
  • the injection molding is preferably carried out at a temperature of the mixture of 90 to 150 ° C and preferably at a pressure of 400 to 800 bar.
  • the chemical debinding is preferably carried out in a paraffin bath, preferably in a hexane bath.
  • the chemical debinding is carried out at a temperature of preferably 10 to 65 ° C, more preferably from 30 to 50 ° C.
  • the thermal debinding is carried out at a temperature of less than 450 ° C, preferably 200 to 350 ° C and preferably in a vacuum at a pressure of preferably 2 to 20 mbar.
  • the sintering is preferably carried out at 80 to 90% of the melting temperature of the metal or the metal alloy and more preferably in a protective gas atmosphere.
  • the protective gas is argon.
  • the sintering can also be done in a vacuum.
  • the pressure is preferably 10 -3 to 10 -5 mbar.
  • Such Holhventilbaumaschinener produced can be connected to each other in a conventional manner by positive and non-positive and molten joining methods.
  • valve disk and poppet can be joined together by a shrink connection.
  • Valve stem and valve stem can be connected by a molten joining process.
  • a titanium alloy containing 6% by weight of aluminum and 4% by weight of vanadium was processed into a valve disk and a poppet.
  • Valve cones and plates were assembled by means of a shrink connection.
  • FIG. 1 shows an illustration of the assembled valve disk and cone in plan view and as a section along the line AA.
  • FIG. 2 shows a manufactured hollow valve member according to the preferred embodiment as a whole component (right) and cut (left).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • General Engineering & Computer Science (AREA)
  • Powder Metallurgy (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Claims (22)

  1. Procédé pour la fabrication d'une pièce de soupape creuse pour moteurs à combustion interne ou turbines, dans lequel
    (a) une poudre de métal et/ou une poudre d'alliage de métal est mélangée avec un liant et le cas échéant à un produit additif dans un pétrisseur,
    (b) le mélange est amené en forme par moulage par injection,
    (c) la masse amenée en forme est débarrassée du liant par voie chimique,
    (d) la masse débarrassée du liant par voie chimique est débarrassée du liant par voie thermique à une température inférieure à 450°C, et
    (e) la masse débarrassée du liant par voie chimique et thermique est frittée à une température au-dessous de la température de fusion du métal et/ou de l'alliage de métal pour fabriquer la pièce.
  2. Procédé selon la revendication 1, dans lequel la pièce de soupape creuse est un cône de soupape.
  3. Procédé selon la revendication 1, dans lequel la pièce de soupape creuse est un opercule de soupape.
  4. Procédé selon l'une des revendications 1 à 3, caractérisée en ce que l'on utilise un alliage de titane à titre de poudre d'alliage métallique.
  5. Procédé selon la revendication 4, caractérisé en ce que l'alliage de titane contient de l'aluminium et/ou du vanadium à titre de composant additionnel.
  6. Procédé selon la revendication 5, caractérisé en ce que l'alliage de titane contient 2 à 10 % d'aluminium et/ou 2 à 10 % de vanadium, en se basant sur le poids total de l'alliage.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que le liant est choisi parmi le groupe comprenant : polyamides, polyoxyméthylène, polycarbonate, copolymère styrène-acrylonitrile, polyimide, cires et huiles naturelles, matières plastiques thermodurcissables, cyanates, polypropylène, polyacétate, polyéthylène, acétate éthylène-vinyle, alcool de polyvinyle, chlorure de polyvinyle, polystyrène, polyméthyle méthacrylate, aniline, huiles minérales, eau, agar, glycérine, polyvinyle butyryle, polybutyle méthacrylate, cellulose, acide oléique, phtalates, cires de paraffine, cire de carnauba, polyacrylate d'ammonium, stéarate et oléate de diglycéride, monostéarate de glycéryle, titanate isopropyle, stéarate de lithium, monoglycérides, formaldéhyde, phosphates d'acide octylique, sulfonates d'oléfines, esters de phosphates, acide stéarique, et leurs mélanges.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que la part volumétrique du liant dans le mélange est inférieure à 60 %.
  9. Procédé selon la revendication 8, caractérisé en ce que la part volumétrique du liant dans le mélange est de 20 % à 50 %.
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que le mélangeage dans le pétrisseur a lieu à une température dans la plage de 50 à 250°C.
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que le moulage par injection a lieu à une température du mélange de 90 à 150°C.
  12. Procédé selon l'une des revendications précédentes, caractérisé en ce que le moulage par injection a lieu à une pression de 400 à 800 bars.
  13. Procédé selon l'une des revendications précédentes, caractérisé en ce que la suppression chimique du liant a lieu dans un bain d'hexane.
  14. Procédé selon l'une des revendications précédentes, caractérisé en ce que la suppression chimique du liant a lieu à une température de 10 à 65°C.
  15. Procédé selon la revendication 14, caractérisé en ce que la suppression chimique du liant a lieu à une température de 30 à 50°C.
  16. Procédé selon l'une des revendications précédentes, caractérisé en ce que la suppression thermique du liant a lieu sous une pression de 2 à 20 mbar.
  17. Procédé selon l'une des revendications précédentes, caractérisé en ce que le frittage a lieu à 80 à 90 % de la température de fusion du métal ou de l'alliage métallique.
  18. Procédé selon l'une des revendications précédentes, caractérisé en ce que le frittage a lieu sous une atmosphère de gaz neutre.
  19. Procédé selon la revendication 18, caractérisé en ce que le gaz neutre est de l'argon.
  20. Procédé selon l'une des revendications 1 à 17, caractérisé en ce que le frittage a lieu sous vide.
  21. Pièce de soupape creuse, qui a été fabriquée avec un procédé selon l'une des revendications 1 à 20, caractérisée en ce qu'elle est en alliage à base de titane.
  22. Pièce de soupape creuse selon la revendication 21, caractérisée en ce que l'alliage à base de titane contient, outre le titane, de 2 à 10 % en poids d'aluminium et/ou de 2 à 10 % en poids de vanadium.
EP07118021A 2006-10-20 2007-10-08 Procédé de production de pièces de soupape creuses pour moteurs à combustion ou turbines et pièce ainsi produite Not-in-force EP1925682B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006049844A DE102006049844A1 (de) 2006-10-20 2006-10-20 Verfahren zur Herstellung von Bauteilen für Verbrennungsmotoren oder Turbinen

Publications (2)

Publication Number Publication Date
EP1925682A1 EP1925682A1 (fr) 2008-05-28
EP1925682B1 true EP1925682B1 (fr) 2010-02-03

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EP07118021A Not-in-force EP1925682B1 (fr) 2006-10-20 2007-10-08 Procédé de production de pièces de soupape creuses pour moteurs à combustion ou turbines et pièce ainsi produite

Country Status (8)

Country Link
US (1) US20080092383A1 (fr)
EP (1) EP1925682B1 (fr)
JP (1) JP2008180211A (fr)
CN (1) CN101413410B (fr)
AT (1) ATE457039T1 (fr)
DE (2) DE102006049844A1 (fr)
ES (1) ES2337302T3 (fr)
PT (1) PT1925682E (fr)

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ES2738003T3 (es) * 2004-10-15 2020-01-17 Taisei Kogyo Co Ltd Proceso de producción de sínter poroso, material de moldeo de sínter poroso y sínter poroso
PT2468436E (pt) * 2010-12-16 2013-07-10 Helmholtz Zentrum Geesthacht Processo para fabricação de corpos metálicos moldados com superfície texturada
CA2865325C (fr) 2012-02-24 2021-03-02 Hoeganaes Corporation Systeme de lubrification amelioree a utiliser dans la metallurgie a poudre
CN104117677B (zh) * 2013-04-23 2017-02-08 昆山广兴电子有限公司 一种金属扇轮的制造方法
CN103240418B (zh) * 2013-05-23 2014-12-24 北京科技大学 一种具有中空内部结构增压涡轮的近终成形方法
FR3037514B1 (fr) * 2015-06-16 2019-08-09 Safran Aircraft Engines Procede de fabrication d'une piece tridimensionnelle fritee a partir d'une poudre et installation permettant de mettre en oeuvre un tel procede
CN105624452B (zh) * 2016-01-05 2018-04-24 南方科技大学 多孔金属间化合物的制备方法
ITUA20163944A1 (it) 2016-05-30 2017-11-30 Nuovo Pignone Tecnologie Srl Process for making a component of a turbomachine, a component obtainable thereby and turbomachine comprising the same / Processo per ottenere un componente di turbomacchina, componente da esso ottenibile e turbomacchina che lo comprende
EP3615254B1 (fr) * 2017-04-27 2021-02-17 Federal-Mogul Valvetrain GmbH Procédé de fabrication d'une soupape à clapet
EP3524280B1 (fr) 2018-02-12 2020-01-08 Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH Procédé de production d'un implant métallique
CN109108267B (zh) * 2018-08-03 2019-12-20 深圳市富荣新材料科技有限公司 一种组合物、制备方法及在金属注塑成型材料领域的应用
CN109897980B (zh) * 2019-02-22 2020-07-21 北京科技大学 钛或钛合金粉的粉末注射成形方法及钛或钛合金制品
CN113399667B (zh) * 2021-06-11 2022-08-16 深圳市泛海统联精密制造股份有限公司 一种钛合金金属粉末注射成型喂料及其制备方法
CN114472879B (zh) * 2021-12-20 2023-04-25 中南大学 一种纯钛粉末注射成形用粘结剂及其制备方法和应用

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EP1926929B1 (fr) * 2005-09-20 2009-02-25 Veritas Ag Ensemble soupape

Also Published As

Publication number Publication date
ES2337302T3 (es) 2010-04-22
DE102006049844A1 (de) 2008-04-24
EP1925682A1 (fr) 2008-05-28
ATE457039T1 (de) 2010-02-15
DE502007002782D1 (de) 2010-03-25
CN101413410B (zh) 2012-06-27
CN101413410A (zh) 2009-04-22
US20080092383A1 (en) 2008-04-24
JP2008180211A (ja) 2008-08-07
PT1925682E (pt) 2010-05-10

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