EP0005668B1 - Procédé de fabrication de pièces en alliage par métallurgie des poudres - Google Patents

Procédé de fabrication de pièces en alliage par métallurgie des poudres Download PDF

Info

Publication number
EP0005668B1
EP0005668B1 EP79400302A EP79400302A EP0005668B1 EP 0005668 B1 EP0005668 B1 EP 0005668B1 EP 79400302 A EP79400302 A EP 79400302A EP 79400302 A EP79400302 A EP 79400302A EP 0005668 B1 EP0005668 B1 EP 0005668B1
Authority
EP
European Patent Office
Prior art keywords
alloy
powder
temperature
process according
nickel
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
Application number
EP79400302A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0005668A1 (fr
Inventor
Jacques Devillard
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP0005668A1 publication Critical patent/EP0005668A1/fr
Application granted granted Critical
Publication of EP0005668B1 publication Critical patent/EP0005668B1/fr
Expired legal-status Critical Current

Links

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
    • C22C1/0433—Nickel- or cobalt-based alloys
    • 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 subject of the present invention is a method for manufacturing alloy parts by powder metallurgy, and more particularly a method for manufacturing superalloy parts based on nickel or on iron, having the form of discs or blades of turbines for rotating machines.
  • the powder metallurgy manufacturing methods make it possible to avoid the aforementioned drawback because by dividing the alloy into microlingots which are then combined by sintering, it is possible to produce highly alloyed preforms having a minimum of segregation.
  • the present invention specifically relates to a method of manufacturing parts in alloys by powder metallurgy which overcomes the aforementioned drawbacks because it allows sintering in the liquid phase without requiring the addition of a foreign element and without implementing high pressures.
  • the method according to the invention is characterized in that it consists in preparing from the constituents of said alloy a homogeneous mixture of a powder of an alloy A 1 and a powder of an alloy A 2 , said alloys A 1 and A 2 comprising all the constituents of said alloy but having a different content of at least one addition element so that the alloy A 1 has a liquid phase at a temperature T 1 lower than the temperature T 2 at which the alloy A 2 forms a liquid phase, and sintering under load the mixture of said powders at a temperature between T 1 and T 2 while maintaining the mixture at said temperature for at most one hour.
  • the fillers are formed by a mixture of two powders having the same basic constituents and the composition of one of the powders differs from the other by the presence of an element lowering the melting point, so that this powder forms a liquid phase at a temperature below the melting temperature of the metal parts to be repaired.
  • the metal charge is compacted, then heated, possibly subjected to an external pressure, until one of the phases melts, so that the alloy is isothermally resolidified at this temperature.
  • the large diffusion of the element lowering the melting point of one of the powders is used to isothermally solidify the load and weld it to the part to be repaired.
  • said alloy is preferably chosen from the group comprising nickel-based alloys and iron-based alloys.
  • the method as characterized above advantageously takes advantage of the fact that, starting from a mixture of two powders forming liquid phases at different temperatures, it is possible to carry out sintering in the liquid phase at a lower temperature by avoiding that the all of the powder forms a liquid phase.
  • At least one of said powders is prepared by rapidly cooling liquid droplets which have been formed from a cylindrical ingot of said alloy by bringing the surface d to a melting temperature. end of said ingot rotated about its axis so that the molten alloy is ejected from the end surface of the ingot, under the action of centrifugal force, which leads, by solidification of the ejected droplets, to obtaining powder particles comprising a solid phase whose composition does not correspond to equilibrium, said solid phase being fusible at a temperature below the theoretical burning temperature of the alloy.
  • the liquid present at the solidification interface rapidly reaches the eutectic composition while the solidified part of the alloy does not have the composition corresponding to the solubility limit.
  • the concentration of the main pale constituents of the alloys A 1 and A 2 is identical and only the contents of certain additives present at minor concentrations vary, in particular, the contents of additives such as carbon, boron and zirconium .
  • the process of the invention proves to be particularly advantageous since the use of two types of powder makes it possible to form a liquid phase only in a single type of powder without requiring the addition of a foreign element and by modifying only very little the content of one of the powders in one of the constituents of the alloy.
  • the mixture of powders is, for example, constituted by equal volumes of powder of alloy A 1 and of powder of alloy A 2 whose particle sizes are substantially identical, for example on the order of 50 to 300 ⁇ .
  • variable volumes of powder of alloy A 1 and of powder of alloy A 2 provided, however, that in the homogeneous mixture of powders, each less fusible particle of alloy A 2 is in contact with a particle plus alloy fuse A 1 .
  • variable particle sizes can be used for each of the powders of alloy A 1 and of alloy A 2 , for example in order to obtain a more compact stacking of powder particles.
  • the duration and pressure of sintering are chosen according to the nature of the alloy.
  • the sintering pressure is advantageously of the order of 100 bars and the duration of sixty minutes.
  • the powder mixture For the sintering operation of the powder mixture, it is preferable to bring the powder mixture to the sintering temperature as quickly as possible, for example by heating in such a way that the temperature of the powder mixture increases. 1000 to 10000 ° C per hour. By operating in this way, large diffusion and homogenization during heating of the powder are avoided, which would be detrimental to obtaining good sintering kinetics.
  • the powder mixture when the powder mixture is at the sintering temperature, it is important to keep the powder mixture at this sintering temperature only for a relatively short period of at most one hour to avoid diffusion and magnification. grains and thus obtain a dense structure well sintered and homogeneous overall.
  • the first powder of alloy A 1 contains 12% chromium, 18% cobalt, 3% molybdenum, 4% titanium, 5 % aluminum, 0.011% boron, 0.05% zirconium and 0.2 % carbon, the rest being nickel, and the second A 2 alloy powder contains 12% chromium. 18% cobalt, 3% molybdenum, 4% titanium, 5% aluminum, 0.011% boron, 0.05% zirconium and 0.003% carbon, the rest being nickel.
  • the powders of alloy A 1 and of alloy A 2 each have a particle size between 50 and 300 w.
  • the mold is then placed inside a heating device, by inserting between the walls of the mold and the device a refractory metal powder having a low sinterability, at the temperature chosen for sintering the powder mixture.
  • the mold containing the powder mixture is then brought to a temperature of approximately 1290 ° C., by heating the mold filled with powders very quickly, for example by increasing its temperature by 1000 ° C. per hour.
  • the mold is then kept at the chosen temperature of 1290 ° C., under a uniaxial pressure of 50 to 100-bars, for a period of approximately sixty minutes to ensure the sintering of the powder mixture.
  • the compression of the powder during sintering is carried out by means of a piston of refractory material which takes place at the top of the mold and can slide in the cylindrical counterweight in order to load inside the mold the additional quantity of powder initially placed in this weight, thus helping to eliminate the porosity in the sintered part.
  • the parts After demolding, the parts have a perfect surface condition with grains with an average size of 50 ⁇ .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
EP79400302A 1978-05-16 1979-05-14 Procédé de fabrication de pièces en alliage par métallurgie des poudres Expired EP0005668B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7814432 1978-05-16
FR7814432A FR2425906A1 (fr) 1978-05-16 1978-05-16 Procede de fabrication de pieces en alliage par metallurgie des poudres

Publications (2)

Publication Number Publication Date
EP0005668A1 EP0005668A1 (fr) 1979-11-28
EP0005668B1 true EP0005668B1 (fr) 1984-11-28

Family

ID=9208274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400302A Expired EP0005668B1 (fr) 1978-05-16 1979-05-14 Procédé de fabrication de pièces en alliage par métallurgie des poudres

Country Status (4)

Country Link
EP (1) EP0005668B1 (enrdf_load_stackoverflow)
JP (1) JPS54150309A (enrdf_load_stackoverflow)
DE (1) DE2967309D1 (enrdf_load_stackoverflow)
FR (1) FR2425906A1 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU561663B2 (en) * 1982-05-28 1987-05-14 General Electric Company Homogeneous superalloy powder mixture for the repair of nickel and cobalt superalloy articles
US4381944A (en) * 1982-05-28 1983-05-03 General Electric Company Superalloy article repair method and alloy powder mixture
FR2610856B1 (fr) * 1987-02-18 1990-04-13 Snecma Procede d'assemblage de pieces en superalliages a base de nickel par frittage en phase liquide et compaction isostatique a chaud
JP4146178B2 (ja) 2001-07-24 2008-09-03 三菱重工業株式会社 Ｎｉ基焼結合金
JP5384079B2 (ja) * 2008-10-29 2014-01-08 Ｎｔｎ株式会社 焼結軸受

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR949279A (fr) * 1940-03-07 1949-08-25 Gen Motors Corp Procédé perfectionné de fabrication d'objets métalliques poreux et produits en résultant
FR968581A (fr) * 1948-06-30 1950-11-30 Boehler & Co Ag Geb Procédé pour la fabrication d'alliages d'acier frittés
GB888274A (en) * 1959-03-19 1962-01-31 Gen Electric Co Ltd Improvements in or relating to the manufacture of sintered alloy bodies
FR1263847A (fr) * 1960-04-14 1961-06-19 Birmingham Small Arms Co Ltd Perfectionnements concernant la métallurgie des poudres
US4008844A (en) * 1975-01-06 1977-02-22 United Technologies Corporation Method of repairing surface defects using metallic filler material
GB1535409A (en) * 1976-09-25 1978-12-13 Ford Motor Co Master alloy powders
US4130422A (en) * 1977-06-16 1978-12-19 The United States Of America As Represented By The United States Department Of Energy Copper-base alloy for liquid phase sintering of ferrous powders

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Pulvermetallurgie, Sinter- und Verbundwerkstoffe, pages 173-177, 122-123, 133-134 *

Also Published As

Publication number Publication date
FR2425906A1 (fr) 1979-12-14
DE2967309D1 (en) 1985-01-10
JPS6312133B2 (enrdf_load_stackoverflow) 1988-03-17
EP0005668A1 (fr) 1979-11-28
JPS54150309A (en) 1979-11-26
FR2425906B1 (enrdf_load_stackoverflow) 1982-10-22

Similar Documents

Publication Publication Date Title
CA2583140C (fr) Alliage a base de nickel
EP1131177B1 (fr) Procede de fabrication par metallurgie des poudres de pieces de forme autobrasantes
EP3860788B1 (fr) Procede de fabrication d'une piece en alliage d'aluminium et une poudre d'alliage d'aluminium
EP3077141B1 (fr) Procédée de fabrication d'une pièce par fusion sélective de poudre
FR3083479A1 (fr) Procede de fabrication d'une piece en alliage d'aluminium
EP1728586B1 (fr) Poudre de superalliage
CA2431574C (fr) Materiau metallique susceptible d'etre use par abrasion; pieces, carter; procede d'elaboration dudit materiau
FR2557148A1 (fr) Procede pour augmenter la forgeabilite d'un article en superalliage a base de nickel
EP3298173B1 (fr) Composition pour la fabrication de pieces en aluminure de titane par frittage de poudre, et procede de fabrication mettant en uvre une telle composition
FR2512837A1 (fr) Articles en monocristal de superalliage a base de nickel
WO2020070451A1 (fr) Procédé de fabrication d'une pièce en alliage d'aluminium
EP1371742B1 (fr) Matériau dense autolubrifiant à sec; pièce mécanique en ledit matériau; procédé d'élaboration dudit matériau
WO2020012098A1 (fr) Procédé de fabrication d'une pièce en alliage d'aluminium
WO2020165542A1 (fr) Procédé de fabrication d'une pièce en alliage d'aluminium
EP0024984B1 (fr) Procédé de fabrication de pièces en alliage à base de titane par métallurgie des poudres
EP0005668B1 (fr) Procédé de fabrication de pièces en alliage par métallurgie des poudres
FR2548937A1 (fr) Procede et appareil de fabrication d'un alliage en poudre
FR3077224A1 (fr) Procede ameliore de fabrication d'une aube monocristalline pour turbomachine
CH619005A5 (enrdf_load_stackoverflow)
FR2557146A1 (fr) Traitement thermique avant compression isostatique a chaud de pieces moulees en superalliage
FR2541151A1 (fr) Procede pour consolider une masse metallique ou ceramique
FR2657032A1 (fr) Procede d'obtention d'un produit a partir de poudres prealliees et produit obtenu a partir dudit procede.
EP4482995A1 (fr) Poudre d'alliage, procédé de fabrication d'une pièce à base de cet alliage et pièce ainsi obtenue
EP4482634A1 (fr) Poudre d'alliage, procédé de fabrication d'une pièce à base de cet alliage et pièce ainsi obtenue
FR3146823A1 (fr) Poudre métallique pour procédé de fabrication additive

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE GB SE

17P Request for examination filed
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: COMMISSARIAT A L'ENERGIE ATOMIQUE ETABLISSEMENT DE

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE GB SE

REF Corresponds to:

Ref document number: 2967309

Country of ref document: DE

Date of ref document: 19850110

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: SINTOOL AKTIEBOLAG

Effective date: 19850809

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: COMMISSARIAT A L'ENERGIE ATOMIQUE ETABLISSEMENT DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19890514

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19890515

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 19890619

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19900201

EUG Se: european patent has lapsed

Ref document number: 79400302.0

Effective date: 19900412