WO1986005424A1 - Procede de fabrication de pieces frittees - Google Patents

Procede de fabrication de pieces frittees Download PDF

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Publication number
WO1986005424A1
WO1986005424A1 PCT/DE1986/000099 DE8600099W WO8605424A1 WO 1986005424 A1 WO1986005424 A1 WO 1986005424A1 DE 8600099 W DE8600099 W DE 8600099W WO 8605424 A1 WO8605424 A1 WO 8605424A1
Authority
WO
WIPO (PCT)
Prior art keywords
binder
mass
crosslinking
thermoplastic
molded part
Prior art date
Application number
PCT/DE1986/000099
Other languages
German (de)
English (en)
Inventor
Werner Hüther
Original Assignee
MTU MOTOREN- UND TURBINEN-UNION MüNCHEN 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 MTU MOTOREN- UND TURBINEN-UNION MüNCHEN GMBH filed Critical MTU MOTOREN- UND TURBINEN-UNION MüNCHEN GMBH
Publication of WO1986005424A1 publication Critical patent/WO1986005424A1/fr

Links

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
    • 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
    • B22F3/10—Sintering only
    • B22F3/1017—Multiple heating or additional 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
    • 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
    • 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
    • B22F5/04—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of turbine blades
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63408—Polyalkenes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/638—Removal thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • 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

Definitions

  • the invention relates to a method for the manufacture of 'sintered components made of metal or ceramic by Spritz ⁇ casting a composition containing a austreibbares binder and optionally a lubricant.
  • thermoplastics e.g. polyethylene, polyethylene waxes, paraffin waxes, cellulose and their derivatives, polyamides, polyaeryls, styrenes
  • thermosets epoxies, polyimide polyesters, phenol-melamine-resorcinol resins
  • the following properties of the binder are particularly important for the production of molded parts by injection molding:
  • the binders of group b) give the injection molded parts good dimensional stability. Since hardened thermosets do not melt when the binder is driven out, the risk of undesired deformation or soot formation is significantly lower than with thermoplastics.
  • the object of the invention is to provide a binder which is distinguished by the following properties:
  • thermoplastic the degree of crosslinking of which can be increased after processing in the injection molding compound, and advantageously
  • a lubricant which lubricant itself advantageously consists of various components and is low-viscosity (less than 100 poise), so that good sliding properties are achieved.
  • the proportion of the binder is advantageously between 2 and 20%, based on the spray compound.
  • the thermoplastic After shaping and cross-linking, the thermoplastic has a high molecular weight and thus a high melting point. It is thereby achieved that the lubricants mixed with the binder can be removed when the binder is driven out at a temperature at which the post-crosslinked thermoplastic does not yet melt and that the molded part therefore has a certain strength. The lubricant can be removed relatively easily without the vapor pressure leading to damage (deformation, cracks) in the molded part during heating.
  • thermoplastic If the post-crosslinked thermoplastic is then expelled at a higher temperature (60 to 90% of the melting temperature), pores and channels are already present because of the previously removed lubricant, through which the thermoplastic now also escapes without damaging the part.
  • thermoset Part of the remaining carbon can be adjusted in a targeted manner, ie
  • thermoset is only used if it is desired that a certain amount of carbon be left after baking.
  • thermoplastic By increasing the degree of crosslinking in the thermoplastic after injection molding, two advantages are achieved:
  • thermoplastic is relatively low molecular weight and low viscosity (less than 100 poise)
  • thermoplastic can be cross-linked subsequently. 1 ways of carrying out the invention:
  • crosslinkable thermoplastic polyethylene, postcrosslinkable - 5 bar by heat in the presence of water (e.g. moist atmosphere in the treatment chamber)
  • thermoset phenolic resin type SW 433 Manufacturer: Bakelite
  • Composition of a sprayable mass for SiC Powder to be processed: sinterable - SiC (melting temperature 2700 C), mixed with 0.6% amorphous boron.
  • composition of a sprayable composition for Ni-based 35 alloy molded parts Powder to be processed: Udimet 700 (Ni-based alloy), grain size less than 45 ⁇ m, average grain size 30 ⁇ m
  • composition of the mass :
  • the heating or expelling of binders and, where appropriate, lubricants can either be continuous for a few hours or in stages in steps from room temperature to over a few hundred C (1st stage) to about sintering temperature (75-95% of the melting temperature) temperature) in an inert atmosphere (Ar).
  • 3 sintered molding had a density of 3.14 g / cm and
  • thermoplastic the use of which degree of wetting is very strongly increased after the injection molding, so that the (green) parts are sufficiently dimensionally stable even before sintering.
  • Turbine blades or wheels which according to the invention can be produced from metal or ceramic by injection molding.
  • the invention also includes all combinations of the claimed features and those which are explained in the description to illustrate the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Powder Metallurgy (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

Procédé de pièces complexes faconnées, comme des aubes ou des roues de turbines en métal ou en céramique par moulage par injection, utilisant un liant approprié à cet effet.
PCT/DE1986/000099 1985-03-15 1986-03-12 Procede de fabrication de pieces frittees WO1986005424A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3509368 1985-03-15
DEP3509368.4 1985-03-15

Publications (1)

Publication Number Publication Date
WO1986005424A1 true WO1986005424A1 (fr) 1986-09-25

Family

ID=6265336

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1986/000099 WO1986005424A1 (fr) 1985-03-15 1986-03-12 Procede de fabrication de pieces frittees

Country Status (2)

Country Link
EP (1) EP0215074A1 (fr)
WO (1) WO1986005424A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005007326A3 (fr) * 2003-07-11 2005-06-16 Mtu Aero Engines Gmbh Procede pour realiser des elements de turbine a gaz et element correspondant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1466697A (fr) * 1966-01-25 1967-01-20 Coors Porcelain Co Procédé pour la fabrication d'objets céramiques
GB1363630A (en) * 1971-11-19 1974-08-14 Atomic Energy Authority Uk Fabrication of permeable sintered artefacts
US3998917A (en) * 1973-05-03 1976-12-21 E. I. Du Pont De Nemours And Company Ceramic compositions and articles made therefrom
GB2030065A (en) * 1978-09-18 1980-04-02 Norton Co Slip casting
EP0065702A2 (fr) * 1981-05-22 1982-12-01 Mtu Motoren- Und Turbinen-Union MàœNchen Gmbh Procédé et installation pour la fabrication d'objets

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1466697A (fr) * 1966-01-25 1967-01-20 Coors Porcelain Co Procédé pour la fabrication d'objets céramiques
GB1363630A (en) * 1971-11-19 1974-08-14 Atomic Energy Authority Uk Fabrication of permeable sintered artefacts
US3998917A (en) * 1973-05-03 1976-12-21 E. I. Du Pont De Nemours And Company Ceramic compositions and articles made therefrom
GB2030065A (en) * 1978-09-18 1980-04-02 Norton Co Slip casting
EP0065702A2 (fr) * 1981-05-22 1982-12-01 Mtu Motoren- Und Turbinen-Union MàœNchen Gmbh Procédé et installation pour la fabrication d'objets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005007326A3 (fr) * 2003-07-11 2005-06-16 Mtu Aero Engines Gmbh Procede pour realiser des elements de turbine a gaz et element correspondant

Also Published As

Publication number Publication date
EP0215074A1 (fr) 1987-03-25

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