EP0217807B1 - Procede de frittage - Google Patents

Procede de frittage Download PDF

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Publication number
EP0217807B1
EP0217807B1 EP86901044A EP86901044A EP0217807B1 EP 0217807 B1 EP0217807 B1 EP 0217807B1 EP 86901044 A EP86901044 A EP 86901044A EP 86901044 A EP86901044 A EP 86901044A EP 0217807 B1 EP0217807 B1 EP 0217807B1
Authority
EP
European Patent Office
Prior art keywords
mixture
produce
intermetallic phases
sintering
ductility
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.)
Expired - Lifetime
Application number
EP86901044A
Other languages
German (de)
English (en)
Other versions
EP0217807A1 (fr
Inventor
Werner Hüther
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
Priority to AT86901044T priority Critical patent/ATE51548T1/de
Publication of EP0217807A1 publication Critical patent/EP0217807A1/fr
Application granted granted Critical
Publication of EP0217807B1 publication Critical patent/EP0217807B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/047—Making non-ferrous alloys by powder metallurgy comprising intermetallic compounds
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/09—Mixtures of metallic powders

Definitions

  • the invention relates to a method for producing complex-shaped components from sinterable powder of the intermetallic phases TiAl, TiAl 3 or NiAl, Ni 3 Al.
  • Sintering processes are known from the documents DE-C-897 921 and GB-A-2 131 457, in which intermetallic phases are first melted and comminuted as a master alloy and then pressed and sintered to form components with an addition of a soft metal powder such as aluminum powder especially withstand pressure and sliding loads.
  • These sintering processes have the disadvantage that, owing to the high proportion of soft metal powder in the sintering mixture, no bodies can be sintered for high tensile stress.
  • the intermetallic phases, TiAI, TiAI 3 or NiAI, Ni 3 AI have a low specific weight and a high melting point. Materials on this basis are therefore of interest for use in components that are subject to high thermal and mechanical loads, particularly in aircraft engines.
  • the materials have so far been produced from the elements by melt metallurgy or by reaction, i.e. e.g. Al powder mixed with Ti powder and Nb powder and heated in a stamp press. When the chemical reaction begins, heat is generated and the desired alloy is formed. With this method it has so far not been possible to produce complicatedly shaped components in a simple manner.
  • the object of the invention is to provide a method which makes it possible to produce components from intermetallic phases in a simple manner, which are complicated in shape and which are exposed to high tensile loads and high temperatures and / or chemical stresses during operation, and which allows them to be carried out in a simple manner Way to manufacture.
  • a pre-alloy of the intermetallic phase TiAl, TiAl 3 or Ni 3 Al, NiA is assumed which, apart from inevitable impurities, contains only these. This master alloy is melted.
  • the master alloy can be ground to a fine powder in a manner known per se (impact mill, ball mill, air jet mill) or atomized (as known per se, e.g. from DE-AS 22 22 830).
  • This powder is now mixed with a powder of one or more other elements. It is desirable that these powders be finer than that of the intermetallic phase.
  • those which cause an increase in the ductility of the intermetallic phase, namely B for Ni / Al or Nb for Ti / Al with a proportion of 0.5 to 10% by weight.
  • Injection molding on the machines commonly used for plastics e.g. with a heated screw conveyor and a mouthpiece or nozzle at the tip of which also injection molding, extrusion, extrusion.
  • Lubricants and binders are removed by heat treatment in a manner known per se (heat treatment under vacuum or inert gas up to 600 ° C).
  • the sintering takes place in the same atmosphere as the above heat treatment and under conditions known per se, in particular at temperatures above 900 ° C., but less than 95% of the melting temperature.
  • the sintering can also take place in several stages.
  • the elements B and Nb which were added to increase the ductility also act as a sintering aid, so that sintering can be carried out at a temperature of 70 to 95% (by weight) of the absolute melting point of the intermetallic phase.
  • densities of 95 to 99% of the theoretical density are within 0.1 to 24 h reached.
  • HIP conditions are also known per se, pressures up to approximately 2500 bar (gas) and temperatures up to approximately 2000 ° C.
  • components such as Turbine blades or wheels, turbochargers or other highly stressed parts (hot, rotating and / or chemically stressed), in particular manufactured by turbomachines.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

Le procédé pour la fabrication d'éléments de construction compliqués à partir de phases intermétalliques frittables utilise des additifs spéciaux qui servent d'activants de frittage et augmentent la ductilité des éléments de construction terminés. Différents exemples d'utilisation sont donnés. Le procédé est utilisé pour la fabrication d'éléments très sollicités thermiquement et mécaniquement, en particulier pour les moteurs d'avion.

Claims (5)

1. Procédé de fabrication de pièces de forme compliquée à partir de poudre frittable de phases intermétalliques comprenant les étapes de processus suivantes:
a) fusion d'un pré-alliage des phases intermétalliques TiAl, TiAI3, ou NiAI, N3AI,
b) broyage du pré-alliage en poudre fine,
c) mélangeage avec des additifs augmentant la ductilité, Nb ou B qui constituent respectivement de 0,5 à 10% en poids intermétalliques Ti/AI et Ni/AI, et représentent simultanément un adjuvant de frittage,
d) bise en forme du mélange,
e) frittage à une température représentant 70 à 95% de la température absolue du point de fusion, de la phase intermétallique pour donner une pièce pouvant être comprimée ultérieurement avec une ductilité accrue, et une densité supérieure à 95% de la densité théorique.
2. Procédé selon la revendication 1, caractérisé en ce que la réduction du pré-alliage en une poudre fine est réalisée par mouture ou pulvérisation.
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le mélange est comprimé par voie isostatique à froid (CIP).
4. Procédé selon l'une quelconque des revendications de 1 à 3, caractérisé en ce que le mélange est mis en oeuvre selon un processus de moulage par injection.
5. Procédé selon l'une quelconque des revendications de 1 à 4, caractérisé en ce qu'on ajoute un traitement thermique et/ou une compression isostatique à chaud.
EP86901044A 1985-02-16 1986-02-07 Procede de frittage Expired - Lifetime EP0217807B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86901044T ATE51548T1 (de) 1985-02-16 1986-02-07 Sinterverfahren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853505481 DE3505481A1 (de) 1985-02-16 1985-02-16 Sinterverfahren
DE3505481 1985-02-16

Publications (2)

Publication Number Publication Date
EP0217807A1 EP0217807A1 (fr) 1987-04-15
EP0217807B1 true EP0217807B1 (fr) 1990-04-04

Family

ID=6262782

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86901044A Expired - Lifetime EP0217807B1 (fr) 1985-02-16 1986-02-07 Procede de frittage

Country Status (5)

Country Link
US (1) US4707332A (fr)
EP (1) EP0217807B1 (fr)
JP (1) JPS62501858A (fr)
DE (2) DE3505481A1 (fr)
WO (1) WO1986004840A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3822686A1 (de) * 1988-07-05 1990-01-11 Geesthacht Gkss Forschung Verfahren zur herstellung von intermetallischen phasen aus pulverfoermigen duktilen komponenten
US4927458A (en) * 1988-09-01 1990-05-22 United Technologies Corporation Method for improving the toughness of brittle materials fabricated by powder metallurgy techniques
DE3935955C1 (fr) * 1989-10-27 1991-01-24 Mtu Muenchen Gmbh
SE9100675D0 (sv) * 1991-03-06 1991-03-06 Sandvik Ab Ceramic whisker-reinforced cutting tool with pre-formed chipbreakers for machining
JP3071118B2 (ja) * 1995-02-09 2000-07-31 日本原子力研究所 微細な添加元素が添加されたＮｉＡｌ金属間化合物を製造する方法
DE19537657A1 (de) * 1995-10-10 1997-04-17 Abb Patent Gmbh Verfahren und Vorrichtung zur Herstellung eines Kontaktstückes
US20100178194A1 (en) * 2009-01-12 2010-07-15 Accellent, Inc. Powder extrusion of shaped sections
US9061351B2 (en) * 2011-11-10 2015-06-23 GM Global Technology Operations LLC Multicomponent titanium aluminide article and method of making

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE897921C (de) * 1938-02-13 1953-11-26 Metallgesellschaft Ag Verfahren zur Herstellung von Lagern aus Aluminium und seinen Legierungen durch Pressen und Sintern der pulverfoermigen Bestandteile
FR1290458A (fr) * 1960-05-14 1962-04-13 Siemens Ag Procédé de fabrication de matériaux thermoélectriques frittés
NL268504A (fr) * 1961-01-09
DE2258780A1 (de) * 1971-12-14 1973-06-28 Goldschmidt Ag Th Verfahren zum herstellen von permanentmagneten auf der basis von kobalt-seltene erden-legierungen
DE2227700A1 (de) * 1972-06-07 1974-01-03 Gen Electric Gesinterte intermetallische verbindungen aus kobalt und seltenem erdmetall
US3953205A (en) * 1973-06-06 1976-04-27 United Technologies Corporation Production of homogeneous alloy articles from superplastic alloy particles
US4347076A (en) * 1980-10-03 1982-08-31 Marko Materials, Inc. Aluminum-transition metal alloys made using rapidly solidified powers and method
FR2537655A1 (fr) * 1982-12-09 1984-06-15 Cegedur Chemises de moteurs a base d'alliages d'aluminium et de composes intermetalliques et leurs procedes d'obtention
US4624705A (en) * 1986-04-04 1986-11-25 Inco Alloys International, Inc. Mechanical alloying

Also Published As

Publication number Publication date
JPS62501858A (ja) 1987-07-23
DE3505481A1 (de) 1986-08-28
DE3670016D1 (de) 1990-05-10
EP0217807A1 (fr) 1987-04-15
US4707332A (en) 1987-11-17
WO1986004840A1 (fr) 1986-08-28

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