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US20080092383A1 - Process for the production of components for combustion engines or turbines - Google Patents

Process for the production of components for combustion engines or turbines Download PDF

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Publication number
US20080092383A1
US20080092383A1 US11/869,309 US86930907A US2008092383A1 US 20080092383 A1 US20080092383 A1 US 20080092383A1 US 86930907 A US86930907 A US 86930907A US 2008092383 A1 US2008092383 A1 US 2008092383A1
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US
United States
Prior art keywords
process according
carried out
temperature
metal
debound
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.)
Abandoned
Application number
US11/869,309
Inventor
Eckard 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
Original Assignee
GKSS Forshungszentrum Geesthacht 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 GKSS Forshungszentrum Geesthacht GmbH filed Critical GKSS Forshungszentrum Geesthacht GmbH
Assigned to GKSS-FORSCHUNGSZENTRUM GEESTHACHT GMBH reassignment GKSS-FORSCHUNGSZENTRUM GEESTHACHT GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AUST, ECKARD, LIMBERG, WOLFGANG, MILDNER, NILS, PIEPLOW, RALF
Publication of US20080092383A1 publication Critical patent/US20080092383A1/en
Abandoned legal-status Critical Current

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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 process for the production of components for combustion engines or turbines, in particular for the production of hollow-valve components.
  • valves are mobile components, the driving power to be applied increases exponentially with the weight of the oscillating masses, i.e. the valves. Thus there is a requirement to further optimize valves in respect of weight without losses in mechanical and thermal strength.
  • Hollow valves with a stem, a valve cone and a valve disk, wherein valve cone and valve disk together form a cavity are known for example from DE 198 04 053 A1. Such hollow valves or hollow valve parts are currently moulded either by hot extrusion or upsetting and forging. Heat-resistant steels such as material nos. 1.4882 (X 50 CrMnNiNbN 21 9), 1.4871 (X 53 CrMnNiN 21 9) or 2.4955 (NiFe 25 Cr 20 NbTi) are predominantly used for the valve cone and valve disk.
  • the object of the invention is therefore to provide a process for the production of components for combustion engines or turbines, in particular for the production of hollow-valve components such as valve cones or valve disks with which other materials can also be processed profitably.
  • the object is achieved by a process for the production of components for combustion engines or turbines, in which:
  • titanium-based materials in addition to the martensitic-ferritic and austenitic steels or nickel-based alloys, titanium-based materials in particular can also be processed profitably into hollow-valve components, whereby a further weight saving compared with the known hollow valves can be achieved.
  • Titanium alloys which contain aluminium and/or vanadium as additional constituents are preferably used. These additional alloy constituents are each preferably contained in a quantity of 2 to 10 wt.-% based on the overall weight of the alloy.
  • the binding agent is preferably selected from the group composed of: polyamides, polyoxymethylene, polycarbonate, styrene-acrylonitrile-copolymerisate, polyimide, natural waxes and oils, thermosetting plastics, cyanates, polypropylene, polyacetate, polyethylene, ethylene vinyl acetate, polyvinyl alcohol, polyvinyl chloride, polystyrene, polymethyl methacylate, anilines, mineral oils, water, agar, glycerol, polyvinyl butyryl, polybutyl methacrylate, cellulose, oleic acid, phthalates, paraffin waxes, carnauba wax, ammonium polyacrylate, digylceride stearate and oleate, glyceryl monostearate, isopropyl titanate, lithium stearate, monoglycerides, formaldehyde, octanoic acid phosphate, olefin sulphonates, phosphat
  • the mixing in the compounder is preferably carried out at a temperature of 50 to 250° C., most preferably 90 to 150° C.
  • the injection moulding is also 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 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 under 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 metal or metal alloy and more preferably under an inert gas atmosphere.
  • the inert gas is preferably argon.
  • the sintering can also be carried out under vacuum. In this case, the pressure is preferably 10-3 to 10-5 mbar.
  • Hollow-valve components produced in this way can be combined with each other in conventional manner by form- and force-locking and also molten joining processes.
  • valve disk and valve cone can be combined by a shrink fit.
  • Valve cone and valve stem can be combined by a molten joining process.
  • FIG. 1 is an illustration of the combined valve disk and cone in top view and in section along the line A-A.
  • FIG. 2 shows a produced hollow-valve component according to the preferred embodiment as a whole component (right) and split (left).

Landscapes

  • 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)

Abstract

The present invention relates to a process for the production of components for combustion engines or turbines, in particular for the production of hollow-valve components, with which for the first time powdery titanium-based alloys, in addition to conventional materials, can be processed into these components. In the process, metal powder and/or metal alloy powder are mixed in a compounder with a binding agent and optionally a flux, the mixture is shaped by injection moulding, the shaped compound is chemically debound, the chemically debound compound is thermally debound at a temperature of less than 450° C. and the chemically and thermally debound compound sintered at a temperature below the melting temperature of the metal and/or metal alloy for the production of the component. The components can be combined with each other in conventional manner by form- and force-locking and also molten joining processes.

Description

  • The present invention relates to a process for the production of components for combustion engines or turbines, in particular for the production of hollow-valve components.
  • Today, combustion engines are expected to combine high performance and low fuel consumption. Gas-exchange valves as used in combustion engines must be able to withstand very high operating temperatures and mechanical stresses. Inlet valves, which are cooled with each intake stroke by cool make-up gases flowing around them, reach valve disk temperatures of over 500° C. Outlet valves reach temperatures of over 800° C.
  • As valves are mobile components, the driving power to be applied increases exponentially with the weight of the oscillating masses, i.e. the valves. Thus there is a requirement to further optimize valves in respect of weight without losses in mechanical and thermal strength.
  • Hollow valves with a stem, a valve cone and a valve disk, wherein valve cone and valve disk together form a cavity, are known for example from DE 198 04 053 A1. Such hollow valves or hollow valve parts are currently moulded either by hot extrusion or upsetting and forging. Heat-resistant steels such as material nos. 1.4882 (X 50 CrMnNiNbN 21 9), 1.4871 (X 53 CrMnNiN 21 9) or 2.4955 (NiFe 25 Cr 20 NbTi) are predominantly used for the valve cone and valve disk. Other materials, in particular lightweight materials based on titanium in powder form cannot, due to the high reactivity of titanium vis-à-vis oxygen, nitrogen and carbon and the concomitant embrittlement of the material, be processed, or not profitably, into hollow-valve components using the named processes.
  • The object of the invention is therefore to provide a process for the production of components for combustion engines or turbines, in particular for the production of hollow-valve components such as valve cones or valve disks with which other materials can also be processed profitably.
  • The object is achieved by a process for the production of components for combustion engines or turbines, in which:
      • (a) metal powder and/or metal alloy powder are mixed in a compounder with a binding agent and optionally an aggregate material,
      • (b) the mixture is shaped by injection moulding,
      • (c) the shaped compound is chemically debound,
      • (d) the chemically debound compound is thermally debound at a temperature of less than 450° C.,
      • (e) the chemically and thermally debound compound is sintered at a temperature below the melting temperature of the metal and/or the metal alloy to produce the component.
  • With the process according to the invention, in addition to the martensitic-ferritic and austenitic steels or nickel-based alloys, titanium-based materials in particular can also be processed profitably into hollow-valve components, whereby a further weight saving compared with the known hollow valves can be achieved. Titanium alloys which contain aluminium and/or vanadium as additional constituents are preferably used. These additional alloy constituents are each preferably contained in a quantity of 2 to 10 wt.-% based on the overall weight of the alloy.
  • The binding agent is preferably selected from the group composed of: polyamides, polyoxymethylene, polycarbonate, styrene-acrylonitrile-copolymerisate, polyimide, natural waxes and oils, thermosetting plastics, cyanates, polypropylene, polyacetate, polyethylene, ethylene vinyl acetate, polyvinyl alcohol, polyvinyl chloride, polystyrene, polymethyl methacylate, anilines, mineral oils, water, agar, glycerol, polyvinyl butyryl, polybutyl methacrylate, cellulose, oleic acid, phthalates, paraffin waxes, carnauba wax, ammonium polyacrylate, digylceride stearate and oleate, glyceryl monostearate, isopropyl titanate, lithium stearate, monoglycerides, formaldehyde, octanoic acid phosphate, olefin sulphonates, phosphate esters, stearic acid and mixtures of same. The proportion by volume of the binding agent is preferably less than 60%, more preferably 20 to 50%.
  • The mixing in the compounder is preferably carried out at a temperature of 50 to 250° C., most preferably 90 to 150° C.
  • The injection moulding is also 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 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 under 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 metal or metal alloy and more preferably under an inert gas atmosphere. The inert gas is preferably argon. Alternatively, the sintering can also be carried out under vacuum. In this case, the pressure is preferably 10-3 to 10-5 mbar.
  • Hollow-valve components produced in this way can be combined with each other in conventional manner by form- and force-locking and also molten joining processes. For example, valve disk and valve cone can be combined by a shrink fit. Valve cone and valve stem can be combined by a molten joining process.
    • PREFERRED EMBODIMENT
  • Using the process described above a titanium alloy with 6 wt.-% aluminium and 4 wt.-% vanadium was processed into a valve disk and a valve cone. Valve cone and disk were combined by a shrink fit.
  • FIG. 1 is an illustration of the combined valve disk and cone in top view and in section along the line A-A.
  • FIG. 2 shows a produced hollow-valve component according to the preferred embodiment as a whole component (right) and split (left).

Claims (23)

1. Process for the production of components for combustion engines or turbines, in which
(a) metal powder and/or metal alloy powder are mixed in a compounder with a binding agent and optionally an aggregate material,
(b) the mixture is shaped by injection moulding,
(c) the shaped compound is chemically debound,
(d) the chemically debound compound is thermally debound at a temperature of less than 450° C.,
(e) the chemically and thermally debound compound is sintered at a temperature below the melting temperature of the metal and/or the metal alloy to produce the component.
2. Process according to claim 1, characterized in that the component is a hollow-valve component.
3. Process according to claim 2, wherein the hollow-valve component is a valve cone.
4. Process according to claim 2, wherein the hollow-valve component is a valve disk.
5. Process according to claim 1, characterized in that a titanium alloy is used as metal-alloy powder.
6. Process according to claim 5, characterized in that the titanium alloy contains aluminium and/or vanadium as additional constituents.
7. Process according to claim 6, characterized in that the titanium alloy contains 2 to 10 wt.-% aluminium and/or 2 to 10 wt.-% vanadium based on the overall weight of the alloy.
8. Process according to claim 1, characterized in that the binding agent is selected from the group consisting of: polyamides, polyoxymethylene, polycarbonate, styrene-acrylonitrile-copolymerisate, polyimide, natural waxes and oils, thermosetting plastics, cyanates, polypropylene, polyacetate, polyethylene, ethylene vinyl acetate, polyvinyl alcohol, polyvinyl chloride, polystyrene, polymethyl methacylate, anilines, mineral oils, water, agar, glycerol, polyvinyl butyryl, polybutyl methacrylate, cellulose, oleic acid, phthalates, paraffin waxes, carnauba wax, ammonium polyacrylate, digylceride stearate and oleate, glyceryl monostearate, isopropyl titanate, lithium stearate, monoglycerides, formaldehyde, octanoic acid phosphate, olefin sulphonates, phosphate esters, stearic acid and mixtures of same.
9. Process according to claim 1, characterized in that the proportion by volume of the binder in the mixture is less than 60%.
10. Process according to claim 9, characterized in that the proportion by volume of the binding agent in the mixture is 20% to 50%.
11. Process according to claim 1, characterized in that the mixing in the compounder is carried out at a temperature in the range from 50 to 250° C.
12. Process according to claim 1, characterized in that the injection moulding is carried out at a temperature of the mixture of 90 to 150° C.
13. Process according to claim 1, characterized in that the injection moulding is carried out at a temperature of 400 to 800 bar.
14. Process according to claim 1, characterized in that the chemical debinding is carried out in a hexane bath.
15. Process according to claim 1, characterized in that the chemical debinding is carried out at a temperature of 10 to 65° C.
16. Process according to claim 15, characterized in that the chemical debinding is carried out at a temperature of 30 to 50° C.
17. Process according to claim 1, characterized in that the thermal debinding is carried out at a pressure of 2 to 20 mbar.
18. Process according to claim 1, characterized in that the sintering is carried out at 80% to 90% of the melting temperature of the metal or metal alloy.
19. Process according to claim 1, characterized in that the sintering is carried out under an inert gas atmosphere.
20. Process according to claim 19, characterized in that the inert gas is argon.
21. Process according to claim 1, characterized in that the sintering is carried out under vacuum.
22. Hollow-valve component which is produced by a process according to claim 1, characterized in that it is composed of a titanium-based alloy.
23. Hollow-valve component according to claim 22, characterized in that in addition to titanium the titanium-based alloy contains 2 to 10 wt.-% aluminium and/or 2 to 10 wt.-% vanadium.
US11/869,309 2006-10-20 2007-10-09 Process for the production of components for combustion engines or turbines Abandoned US20080092383A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006049844A DE102006049844A1 (en) 2006-10-20 2006-10-20 Process for the production of components for internal combustion engines or turbines
DE102006049844.5 2006-10-20

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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120153549A1 (en) * 2010-12-16 2012-06-21 Helmholtz-Zentrum Geesthacht Zentrum fur Material-und Kustenforschung GmbH Process for Producing Shaped Metal Bodies Having a Structured Surface
US20160090327A1 (en) * 2004-10-15 2016-03-31 Taisei Kogyo Co., Ltd. Method of making a porous sintered body, a compound for making the porous sintered body, and the porous sintered body
FR3037514A1 (en) * 2015-06-16 2016-12-23 Snecma METHOD FOR MANUFACTURING A THREE-DIMENSIONAL PIECE FRYED FROM A POWDER AND INSTALLATION FOR CARRYING OUT SAID METHOD
US9533353B2 (en) 2012-02-24 2017-01-03 Hoeganaes Corporation Lubricant system for use in powder metallurgy
EP3524280A1 (en) 2018-02-12 2019-08-14 Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH Method for producing a metallic implant
US11305346B2 (en) * 2017-04-27 2022-04-19 Federal-Mogul Valvetrain Gmbh Poppet valve and method of its manufacture

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CN104117677B (en) * 2013-04-23 2017-02-08 昆山广兴电子有限公司 Manufacturing method of metal fan wheel
CN103240418B (en) * 2013-05-23 2014-12-24 北京科技大学 Near-net shaping method for charging turbine with hollow internal structure
CN105624452B (en) * 2016-01-05 2018-04-24 南方科技大学 Method for preparing porous intermetallic compound
ITUA20163944A1 (en) 2016-05-30 2017-11-30 Nuovo Pignone Tecnologie Srl Process for making a component of a turbomachine, to a component obtainable consequently and turbomachine comprising the same / Process for obtaining a turbomachinery component, a component obtainable from it and a turbomachine which comprises it
CN109108267B (en) * 2018-08-03 2019-12-20 深圳市富荣新材料科技有限公司 Composition, preparation method and application in field of metal injection molding material
CN109897980B (en) * 2019-02-22 2020-07-21 北京科技大学 Powder injection molding method of titanium or titanium alloy powder and titanium or titanium alloy product
CN113399667B (en) * 2021-06-11 2022-08-16 深圳市泛海统联精密制造股份有限公司 Titanium alloy metal powder injection molding feed and preparation method thereof
CN114472879B (en) * 2021-12-20 2023-04-25 中南大学 A kind of binder for pure titanium powder injection molding and its preparation method and application

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JPH02274382A (en) * 1989-04-12 1990-11-08 Nippon Steel Corp Hard facing method by welding for engine valve
US6351258B1 (en) * 1997-06-30 2002-02-26 Sony Corporation Switcher system and I/O switching method
US20090072176A1 (en) * 2005-09-20 2009-03-19 Thomas Rosch Valve Device

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US4478790A (en) * 1981-05-22 1984-10-23 Mtu Motoren-Und Turbinen-Union Munchen Gmbh Method and apparatus for manufacturing molded articles of alloyed material
JPH02274382A (en) * 1989-04-12 1990-11-08 Nippon Steel Corp Hard facing method by welding for engine valve
US6351258B1 (en) * 1997-06-30 2002-02-26 Sony Corporation Switcher system and I/O switching method
US20090072176A1 (en) * 2005-09-20 2009-03-19 Thomas Rosch Valve Device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160090327A1 (en) * 2004-10-15 2016-03-31 Taisei Kogyo Co., Ltd. Method of making a porous sintered body, a compound for making the porous sintered body, and the porous sintered body
US11819917B2 (en) 2004-10-15 2023-11-21 Taisei Kogyo Co., Ltd. Method of making a porous sintered body, a compound for making the porous sintered body, and the porous sintered body
US20120153549A1 (en) * 2010-12-16 2012-06-21 Helmholtz-Zentrum Geesthacht Zentrum fur Material-und Kustenforschung GmbH Process for Producing Shaped Metal Bodies Having a Structured Surface
US9533353B2 (en) 2012-02-24 2017-01-03 Hoeganaes Corporation Lubricant system for use in powder metallurgy
FR3037514A1 (en) * 2015-06-16 2016-12-23 Snecma METHOD FOR MANUFACTURING A THREE-DIMENSIONAL PIECE FRYED FROM A POWDER AND INSTALLATION FOR CARRYING OUT SAID METHOD
US11305346B2 (en) * 2017-04-27 2022-04-19 Federal-Mogul Valvetrain Gmbh Poppet valve and method of its manufacture
EP3524280A1 (en) 2018-02-12 2019-08-14 Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH Method for producing a metallic implant

Also Published As

Publication number Publication date
DE102006049844A1 (en) 2008-04-24
EP1925682B1 (en) 2010-02-03
JP2008180211A (en) 2008-08-07
EP1925682A1 (en) 2008-05-28
DE502007002782D1 (en) 2010-03-25
ATE457039T1 (en) 2010-02-15
ES2337302T3 (en) 2010-04-22
CN101413410B (en) 2012-06-27
PT1925682E (en) 2010-05-10
CN101413410A (en) 2009-04-22

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