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EP0065702A2 - Procédé et installation pour la fabrication d'objets - Google Patents

Procédé et installation pour la fabrication d'objets Download PDF

Info

Publication number
EP0065702A2
EP0065702A2 EP82104097A EP82104097A EP0065702A2 EP 0065702 A2 EP0065702 A2 EP 0065702A2 EP 82104097 A EP82104097 A EP 82104097A EP 82104097 A EP82104097 A EP 82104097A EP 0065702 A2 EP0065702 A2 EP 0065702A2
Authority
EP
European Patent Office
Prior art keywords
based alloys
alloy
alloys
heat treatment
molded part
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.)
Withdrawn
Application number
EP82104097A
Other languages
German (de)
English (en)
Other versions
EP0065702A3 (fr
Inventor
Werner Dr.-Ing. Hüther
Axel Ing.-Grad. Rossmann
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.)
MTU Aero Engines AG
Original Assignee
MTU Motoren und Turbinen Union Muenchen 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 Muenchen GmbH filed Critical MTU Motoren und Turbinen Union Muenchen GmbH
Publication of EP0065702A2 publication Critical patent/EP0065702A2/fr
Publication of EP0065702A3 publication Critical patent/EP0065702A3/fr
Withdrawn legal-status Critical Current

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
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B22F3/15—Hot isostatic pressing
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

Definitions

  • the invention relates to a method and a device for producing molded parts from alloy material, in particular from nickel-based alloys, chromium-based alloys, titanium-based alloys, and dispersion-hardened alloys.
  • Moldings are usually made from nickel-based alloys, chrome and titanium alloys by investment casting. Castings, however, have comparatively poor mechanical properties, in particular with regard to the fatigue strength, which is the case with statically or dynamically stressed parts, e.g. B. in rotor blades and vanes of turbines, is important.
  • the object of the invention is to provide a method and a device for producing molded parts of the type mentioned at the outset, in which the aforementioned disadvantages of wrought alloys or cast alloys are overcome and, in particular, improved properties are achieved with simple effort.
  • the object on which the invention is based is achieved in a method according to the invention in that a powder of the corresponding alloy or a mixture of powders of the corresponding alloy components with the aid of plastics in the form of thermoplastics, thermosets and lubricants to form an injectable approx. 30 to 50 volume percent Plastic-containing granulate mass is processed, which is injection molded into a molded part.
  • the injectable granulate mass is prepared in particular by dissolving the plastics in a solvent which does not attack the base metal of the alloy and mixing them with the metal powder, and then evaporating the solvent.
  • the plastics of the injection molded part are expediently removed from the molded part at least by heat treatment up to approximately 600 ° C. under protective gas or vacuum. partially removed.
  • the molded part is advantageously sintered under protective gas at a temperature of 50 to 90% of the melting temperature of the metal used in the alloy. This causes the molded part to shrink, reaching a density of 95 to 98% of the theoretical density.
  • the injection molded part can be hot isostatically compressed at a pressure of approximately 500 to 3000 bar and at the sintering temperature of the metal used. This brings the density of the molded part to almost 100%, which increases the strength considerably.
  • Polyethylene, polystyrene, polyamides and / or cellulose and their derivatives are advantageously suitable as thermoplastics, epoxy resins, phenolic resins and / or polyimides as thermosets, while stearic acid, stearates and / or waxes are advantageously used as plastic lubricants.
  • a low-carbon starting powder or mixture For molded parts made of a nickel-based alloy, a titanium-based alloy or a chrome-based alloy tion are constructed, it is advantageous to use a low-carbon starting powder or mixture. Most binders leave behind free carbon when burned out, which could impair the properties of the molded part. By using a low-carbon starting material, the maximum permissible carbon content in the molded part is not exceeded, despite the carbon remaining from the binders.
  • the aforementioned problem is also overcome if a heat treatment is carried out under hydrogen after the burnout.
  • the set pressure is 1 to 300 bar, the heat treatment takes place at a temperature of approx. 400 to 1000 ° C.
  • the method according to the invention can be modified in such a way that a heat treatment is carried out after the sintering process in order to set the most favorable grain size of the material of the molded part.
  • a device for carrying out the method according to the invention is characterized in that those parts of the device which experience wear due to friction with the injectable granulate mass are formed or coated from the material of the alloy to be processed. This prevents contamination during processing of the alloy used.
  • the vibration resistance of the material is improved by the invention. It can also advantageously produce complicated parts with high demands on the end profile, such as. B. turbine blades and vanes or integral turbine wheels.
  • the finished molded part is in a form that may require a subsequent machining or electrochemical processing to a small extent.
  • the drastic reduction in the machining effort compared to the known manufacturing processes for molded parts mentioned in the introduction creates a simple manufacturing process with a high-quality result, which is very inexpensive in comparison with known processes.
  • the plastics used are dissolved in a solvent that does not attack the metals and mixed with the metal powder.
  • the solvent is then removed vapors, and the mass is processed into an injectable granulate. These granules can now be processed into molded parts by injection molding.
  • the plastic is removed from the molded part after injection molding by heat treatment up to 600 ° C under protective gas.
  • the part is then sintered, the sintering process taking place under a protective gas or vacuum at temperatures of 50 to 90% of the melting temperature of the metal used.
  • the part shrinks linearly between 10 and 25% and reaches a final density of 95 to 98% of the theoretical density of the material.
  • nickel-based alloys The main problem with nickel-based alloys is that most binders leave free carbon when burned out. This can impair the properties of the molded part to be manufactured.
  • the binder releases hydrogen when it burns out. Hydrogen is readily soluble in titanium alloys and worsens the strength properties. The hydrogen must be removed by heat treatment using known methods in vacuo or under a protective gas.
  • Titanium alloys can be oxidized very easily. All process steps that take place at a temperature higher than room temperature should therefore be carried out in a vacuum or under protective gas. This includes, in particular, mixing the mass and spraying the molded parts. Known evacuable mixers are advantageously used. Evacuable injection molding machines are expediently used for spraying.
  • Chromium alloys are very similar to nickel alloys in terms of their chemical properties, which is why the problem is the same. Remedies can be used to overcome the problem of free oxygen, as stated under Ni-based alloys.
  • Dispersion hardened alloys are two or multi-phase materials in which the matrix consists of an oxidation-resistant, usually single-phase alloy. Particles of a second phase (or more phases) are embedded in the matrix.
  • the characteristic of dispersion-hardened alloys is that the particles cannot be dissolved in the matrix. The particles cause the material to harden.
  • the advantage of the dispersion-hardened alloy is its aging Resistance at high temperature due to the insolubility of the second phase.
  • the particles are usually introduced into the melt of the matrix alloy. This method has the disadvantage that concentration gradients occur when the molded parts are poured because of the density differences between the matrix and the particles. Adhesive forces also tend to clump the particles. Overall, only a very unsatisfactory particle distribution can be achieved. A homogenization by plastic forming is not possible, since the plastic deformability is not sufficient with the known alloys.
  • Very homogeneous particle distributions can be produced in the method according to the invention.
  • the particles are added to the matrix powder and mixed with it. Since there is no melting phase during the entire process, segregation or gradient formation is not possible. Even with the steps "preparation of the mass and injection molding" the distribution is not deteriorated, but rather improved.
  • the very homogeneous particle distribution that can be achieved results in considerably better strength properties of the molded parts than in known manufacturing processes.
  • the core consists of a material that also decomposes when it burns out (core materials: plastics, preferably thermosets, possibly reinforced with C fibers). With the help of cores z. B. Easily produce complicated cooling configurations in turbine blades.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
EP82104097A 1981-05-22 1982-05-12 Procédé et installation pour la fabrication d'objets Withdrawn EP0065702A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3120501A DE3120501C2 (de) 1981-05-22 1981-05-22 "Verfahren und Vorrichtung zur Herstellung von Formteilen"
DE3120501 1981-05-22

Publications (2)

Publication Number Publication Date
EP0065702A2 true EP0065702A2 (fr) 1982-12-01
EP0065702A3 EP0065702A3 (fr) 1983-02-02

Family

ID=6133031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104097A Withdrawn EP0065702A3 (fr) 1981-05-22 1982-05-12 Procédé et installation pour la fabrication d'objets

Country Status (4)

Country Link
US (1) US4478790A (fr)
EP (1) EP0065702A3 (fr)
JP (1) JPS57198202A (fr)
DE (1) DE3120501C2 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4582677A (en) * 1980-09-22 1986-04-15 Kabushiki Kaisha Kobe Seiko Sho Method for producing honeycomb-shaped metal moldings
EP0111079A3 (en) * 1982-12-07 1986-04-23 Hutschenreuther Ag Method of preparing ceramic compositions to be injection-moulded
WO1986005424A1 (fr) * 1985-03-15 1986-09-25 MTU MOTOREN- UND TURBINEN-UNION MüNCHEN GMBH Procede de fabrication de pieces frittees
WO1987000781A1 (fr) * 1985-07-31 1987-02-12 MTU MOTOREN- UND TURBINEN-UNION MüNCHEN GMBH Elements de construction fabriques par la metallurgie des poudres
EP0203197A4 (fr) * 1984-10-26 1987-03-30 Agency Ind Science Techn Procede de production d'un materiau d'alliage extremement resistant a la chaleur.
EP0235165A4 (fr) * 1985-08-29 1988-08-23 Gorham Int Inc Procede de frittage assiste par une pression.
EP0260812A3 (fr) * 1986-09-15 1988-11-17 Inco Alloys International, Inc. Fabrication de produits à partir de poudre métallique obtenue par atomisation
DE3907022A1 (de) * 1988-03-11 1989-09-21 Krupp Gmbh Verfahren zur herstellung von sinterteilen aus feinkoernigen metall- oder keramikpulvern
EP0517129A3 (en) * 1991-06-01 1993-03-03 Hoechst Aktiengesellschaft Moldable mass for the production of sintered inorganic articles
WO2000006327A3 (fr) * 1998-07-29 2000-05-04 Fraunhofer Ges Forschung Procede de production de composants par un procede de moulage par injection de poudre metallique
DE102006049844A1 (de) * 2006-10-20 2008-04-24 Gkss-Forschungszentrum Geesthacht Gmbh Verfahren zur Herstellung von Bauteilen für Verbrennungsmotoren oder Turbinen
EP2018917A1 (fr) 2007-07-15 2009-01-28 General Electric Company Procédés de moulage à injection pour fabriquer des composants capables de transporter des liquides

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4609527A (en) * 1985-05-24 1986-09-02 Rinderle James R Powder consolidation and machining
JPH079004B2 (ja) * 1985-11-08 1995-02-01 株式会社神戸製鋼所 鉄系粉末成形体の焼結方法
DE3611271A1 (de) * 1986-04-04 1987-10-15 Licentia Gmbh Verfahren zur herstellung von metallformteilen
DE3644871A1 (de) * 1986-04-04 1987-10-15 Licentia Gmbh Verfahren zur steuerung der sinterung von durch pulvermetallspritzguss hergestellten metallformteilen
JPS62294142A (ja) * 1986-06-12 1987-12-21 Agency Of Ind Science & Technol ニツケル−チタン合金の製造方法
DE3626360C2 (de) * 1986-08-04 1995-06-22 Vogt Electronic Ag Herstellungsvefahren für zwei- und mehrpolige Dauermagnete mit hoher magnetischer Energiedichte
US4882110A (en) * 1987-01-27 1989-11-21 Air Products And Chemicals, Inc. CO2 copolymer binder for forming ceramic bodies and a shaping process using the same
JPH0647682B2 (ja) * 1987-09-10 1994-06-22 株式会社トーキン 金属焼結体の製造方法
US5145908A (en) * 1988-02-22 1992-09-08 Martin Marietta Energy Systems, Inc. Method for molding ceramic powders using a water-based gel casting process
US4894194A (en) * 1988-02-22 1990-01-16 Martin Marietta Energy Systems, Inc. Method for molding ceramic powders
US5028362A (en) * 1988-06-17 1991-07-02 Martin Marietta Energy Systems, Inc. Method for molding ceramic powders using a water-based gel casting
US4964907A (en) * 1988-08-20 1990-10-23 Kawasaki Steel Corp. Sintered bodies and production process thereof
JPH02225602A (ja) * 1988-11-29 1990-09-07 Daicel Chem Ind Ltd 焼結金属の製造法
JPH02209402A (ja) * 1989-02-07 1990-08-20 Nkk Corp チタン粉末又はチタン合金粉末燒結体の製造方法
DE3912298A1 (de) * 1989-04-14 1990-10-18 Basf Ag Verfahren zum entwachsen und zur verbesserung der eigenschaften spritzgegossener metallteile
US5468193A (en) * 1990-10-25 1995-11-21 Sumitomo Heavy Industries, Ltd. Inscribed planetary gear device having powder injection molded external gear
JP2592930Y2 (ja) * 1991-12-11 1999-03-31 日本電熱株式会社 コーヒミルのカッター成形部品
US5665014A (en) * 1993-11-02 1997-09-09 Sanford; Robert A. Metal golf club head and method of manufacture
US6066279A (en) * 1997-09-16 2000-05-23 Lockheed Martin Energy Research Corp. Gelcasting methods
US6280683B1 (en) 1997-10-21 2001-08-28 Hoeganaes Corporation Metallurgical compositions containing binding agent/lubricant and process for preparing same
KR100368997B1 (ko) * 1997-10-21 2003-01-24 회가나에스 코오포레이션 결합제/윤활제를 함유하는 향상된 야금 조성물 및 그 제조방법
US6221289B1 (en) 1998-08-07 2001-04-24 Core-Tech, Inc. Method of making ceramic elements to be sintered and binder compositions therefor
US6325964B1 (en) * 2000-09-18 2001-12-04 New Century Technology Co., Ltd. Method of manufacturing high-density titanium alloy article
US20060251536A1 (en) * 2005-05-05 2006-11-09 General Electric Company Microwave processing of mim preforms
US7883662B2 (en) * 2007-11-15 2011-02-08 Viper Technologies Metal injection molding methods and feedstocks
FR2949366B1 (fr) * 2009-08-31 2011-11-18 Snecma Realisation par procede mim d'un morceau de piece pour la reparation d'une aube de distributeur de turbine
US8124187B2 (en) 2009-09-08 2012-02-28 Viper Technologies Methods of forming porous coatings on substrates
CN107159878A (zh) * 2017-05-16 2017-09-15 昆山卡德姆新材料科技有限公司 一种金属料体及其制备方法和应用
CN111644625B (zh) * 2020-06-04 2022-05-24 东睦新材料集团股份有限公司 一种铬合金燃料电池连接件的制备方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593943A (en) * 1949-03-01 1952-04-22 Thompson Prod Inc Methods of molding powders of metal character
FR1024349A (fr) * 1949-09-12 1953-03-31 Production Tool Alloy Company Procédé de fabrication de moules et d'objets moulés à partir de matières pulvérulentes frittables
GB779242A (en) * 1952-08-11 1957-07-17 Standard Telephones Cables Ltd Improvements in or relating to the formation of moulded articles from sinterable materials
FR1466697A (fr) * 1966-01-25 1967-01-20 Coors Porcelain Co Procédé pour la fabrication d'objets céramiques
DE1964426C3 (de) * 1969-12-23 1974-03-21 Reinhold 1000 Berlin Ruestig Formbares und härtbares Gemisch aus Kunstharzen und Metallpulver und Verfahren zur Herstellung von druck- und warmfesten Sinterkörpern daraus
US4113480A (en) * 1976-12-09 1978-09-12 Cabot Corporation Method of injection molding powder metal parts
GB1603855A (en) * 1978-05-10 1981-12-02 Johnson Matthey Co Ltd Resin-impregnated sintered silver articles
JPS5520259A (en) * 1978-07-28 1980-02-13 Ngk Spark Plug Co Production of high density sintered body
DE2904707A1 (de) * 1979-02-08 1980-08-21 Manfred Dipl Chem Dr Re Sauber Verfahren zum herstellen von gegenstaenden aus keramischen stoffen, insbesondere oxidkeramischen stoffen
US4305756A (en) * 1980-01-14 1981-12-15 Witec Cayman Patents, Ltd. Method and means for removing binder from a green body

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4582677A (en) * 1980-09-22 1986-04-15 Kabushiki Kaisha Kobe Seiko Sho Method for producing honeycomb-shaped metal moldings
EP0111079A3 (en) * 1982-12-07 1986-04-23 Hutschenreuther Ag Method of preparing ceramic compositions to be injection-moulded
US4710345A (en) * 1984-10-26 1987-12-01 Japan as represented by Director-General, Agency of Industrial Science & Technology Manufacturing method of super-heat-resisting alloy material
EP0203197A4 (fr) * 1984-10-26 1987-03-30 Agency Ind Science Techn Procede de production d'un materiau d'alliage extremement resistant a la chaleur.
WO1986005424A1 (fr) * 1985-03-15 1986-09-25 MTU MOTOREN- UND TURBINEN-UNION MüNCHEN GMBH Procede de fabrication de pieces frittees
US4886639A (en) * 1985-07-31 1989-12-12 Mtu Motoren- Und Turbinen-Union Muenchen Gmbh Construction elements produced by powder metallurgy
WO1987000781A1 (fr) * 1985-07-31 1987-02-12 MTU MOTOREN- UND TURBINEN-UNION MüNCHEN GMBH Elements de construction fabriques par la metallurgie des poudres
EP0235165A4 (fr) * 1985-08-29 1988-08-23 Gorham Int Inc Procede de frittage assiste par une pression.
EP0260812A3 (fr) * 1986-09-15 1988-11-17 Inco Alloys International, Inc. Fabrication de produits à partir de poudre métallique obtenue par atomisation
DE3907022A1 (de) * 1988-03-11 1989-09-21 Krupp Gmbh Verfahren zur herstellung von sinterteilen aus feinkoernigen metall- oder keramikpulvern
EP0517129A3 (en) * 1991-06-01 1993-03-03 Hoechst Aktiengesellschaft Moldable mass for the production of sintered inorganic articles
TR27113A (tr) * 1991-06-01 1994-11-08 Hoechst Ag Inorganik sinter ürünlerinin üretilmesine mahsus kalip kitlesi.
WO2000006327A3 (fr) * 1998-07-29 2000-05-04 Fraunhofer Ges Forschung Procede de production de composants par un procede de moulage par injection de poudre metallique
DE102006049844A1 (de) * 2006-10-20 2008-04-24 Gkss-Forschungszentrum Geesthacht Gmbh Verfahren zur Herstellung von Bauteilen für Verbrennungsmotoren oder Turbinen
EP2018917A1 (fr) 2007-07-15 2009-01-28 General Electric Company Procédés de moulage à injection pour fabriquer des composants capables de transporter des liquides

Also Published As

Publication number Publication date
US4478790A (en) 1984-10-23
JPS57198202A (en) 1982-12-04
DE3120501A1 (de) 1982-12-09
EP0065702A3 (fr) 1983-02-02
DE3120501C2 (de) 1983-02-10

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