EP0217807A1 - Procede de frittage. - Google Patents

Procede de frittage.

Info

Publication number
EP0217807A1
EP0217807A1 EP86901044A EP86901044A EP0217807A1 EP 0217807 A1 EP0217807 A1 EP 0217807A1 EP 86901044 A EP86901044 A EP 86901044A EP 86901044 A EP86901044 A EP 86901044A EP 0217807 A1 EP0217807 A1 EP 0217807A1
Authority
EP
European Patent Office
Prior art keywords
powder
intermetallic phases
master alloy
intermetallic
elements
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.)
Granted
Application number
EP86901044A
Other languages
German (de)
English (en)
Other versions
EP0217807B1 (fr
Inventor
Werner Huther
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 GmbH
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

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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/09—Mixtures of metallic powders
    • 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

Definitions

  • the invention relates to a method for producing complex shaped components from sinterable powder of intermetallic phases.
  • Intermetallic phases in particular Ti Al, Ti Al, Ni Ni, Ni Al, have a low specific weight and a high melting point. Materials on this basis are therefore of interest for use in thermally and mechanically highly stressed components, in particular in aircraft engines.
  • the materials have hitherto been produced by melt metallurgy or by reaction from the elements, ie. B. Al powder mixed with Ti powder and Nb powder and heated in a stamp press. When the chemical reaction begins, heat is generated and it is formed desired alloy. 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 easily produce components from intermetallic phases which are of complex shape. This is solved by the features of claim 1.
  • the starting point is a pre-alloy of the intermetallic phase, which apart from inevitable impurities only contains it, e.g. E.g .: Ni, AI, Ni AI, Ti AI, Ti AI ,. 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, for example 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 are finer than that of the intermetallic phase.
  • the prepared powder mixture can now, apart from a shrinkage of 10 to 20% (vol.), Be brought to the final shape using known methods:
  • Binder waxes, thermoplastics and / or thermosets CIP see e.g. B. DE 33 28 954 machining by grinding and polishing to final dimensions
  • Expelling binder as in a) lubricants such as stearins.
  • Injection molding on the machines customary for plastics for example with a heated screw conveyor and a mouthpiece or nozzle at the tip thereof, also injection molding, extrusion, extrusion.
  • Lubricants and binders are removed by heat treatment in a manner known per se (heat treatment under vacuum or intergas 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 that were added to increase the ductility also act as a sintering aid, so that at a temperature of 70 to 95% (wt.) Of the absolute Sintering can be carried out at the melting point of the intermetallic phase.
  • densities of 95 to 99% of the theoretical density are reached within 0.1 to 24 hours.
  • the parts can then be hot isostatically pressed in order to achieve practically 100% density.
  • HIP conditions are also known per se, pressures up to about 2500 bar (gas) and temperatures up to about 2000 ° C.
  • Turbine blades or wheels, turbochargers or other highly stressed parts hot, rotating "and / or chemically stressed), in particular of turbo machines.

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.
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
DE3505481 1985-02-16
DE19853505481 DE3505481A1 (de) 1985-02-16 1985-02-16 Sinterverfahren

Publications (2)

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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8604840A1 *

Also Published As

Publication number Publication date
DE3670016D1 (de) 1990-05-10
JPS62501858A (ja) 1987-07-23
DE3505481A1 (de) 1986-08-28
WO1986004840A1 (fr) 1986-08-28
EP0217807B1 (fr) 1990-04-04
US4707332A (en) 1987-11-17

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