EP0265307A1 - Process for manufacturing shaped bodies from hypereutectic aluminium-silicon alloys, starting from powders obtained by rapid cooling - Google Patents

Process for manufacturing shaped bodies from hypereutectic aluminium-silicon alloys, starting from powders obtained by rapid cooling Download PDF

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Publication number
EP0265307A1
EP0265307A1 EP87402094A EP87402094A EP0265307A1 EP 0265307 A1 EP0265307 A1 EP 0265307A1 EP 87402094 A EP87402094 A EP 87402094A EP 87402094 A EP87402094 A EP 87402094A EP 0265307 A1 EP0265307 A1 EP 0265307A1
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Prior art keywords
powder
die
starting
alloy
powders
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EP87402094A
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German (de)
French (fr)
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EP0265307B1 (en
Inventor
Michel André Lochon
Bernard Serole
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Specim SA
Automobiles Peugeot SA
Automobiles Citroen SA
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Specim SA
Automobiles Peugeot SA
Automobiles Citroen SA
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    • 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
    • C22C1/0408—Light metal alloys
    • C22C1/0416—Aluminium-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
    • 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
    • B22F3/006—Amorphous articles
    • 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
    • B22F3/1208—Containers or coating used therefor
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/002—Making metallic powder or suspensions thereof amorphous or microcrystalline
    • B22F9/008—Rapid solidification processing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium

Definitions

  • the invention relates to a method for manufacturing parts of hypersilicon aluminum alloy whose composition by weight is included in the following ranges: Fe 0.5 to 5% Zn 0 to 0.5% Ni 0.5 to 5% Ti 0 to 0.3% P 0 to 1% Si 19 to 30% Mo 0.5 to 2% Pb 0 to 0, 2% Co 0.5 to 5% Cu 0.5 to 3% Mn 0.2 to 1% Sn 0 to 0.5% Mg 0 to 1.5%
  • the various additives involved in this composition exercise the following functions and could be replaced by others acting in an equivalent manner.
  • Si hardens reduces the coefficient of expansion, increases resistance to wear and improves friction, strengthens the structure and raises the elastic modulus.
  • Zn, Cu, Mg, Fe are hardeners.
  • Co, Ti, Mo, W, Va, B, Ta, Ca, P are refiners.
  • C, Sn improve friction.
  • the alloy thus defined has a low density, a low coefficient of expansion and good mechanical characteristics. It finds applications in hot and moving parts of automobile engines such as pistons, liners, connecting rods, piston pins, cylinder head insert, etc.
  • Silicon crystals when they are too large have obvious drawbacks for the machinability, the homogeneity and the mechanical characteristics of the parts.
  • the process which is the subject of the invention makes it possible to produce parts in hypersilicon aluminum alloy comprising silicon crystals of size less than 1 ⁇ , ie 1 thousandth of a millimeter or silicon in the state of solid solution.
  • Processes are known for manufacturing hypersilicon aluminum alloy parts using the techniques of powder metallurgy. These techniques consist of transforming the alloy ingots into powder by centrifugation and atomization. The grains of powder whose dimensions are of the order of 500 ⁇ cool more quickly than the ingots so that the silicon crystals have dimensions ranging from 5 to 25 ⁇ . When the powders are forged or hot spun, the grains grow in a ratio 2 and reach 10 to 50 ⁇ .
  • the process which is the subject of the invention defines, on the one hand, means for obtaining a powder whose grain dimensions vary from 0 to 120 ⁇ with silicon crystals of less than 1 ⁇ or of silicon in solid solution; and on the other hand, means for extruding parts from this powder without enlarging the silicon crystals.
  • the method according to the invention comprises the following steps.
  • the alloy is melted and brought to a temperature higher than the melting temperature of about 80 to 180 ° C so as to obtain an appropriate viscosity.
  • a jet is formed from the liquid which passes through a calibrated nozzle. The jet is then taken into account by a supersonic nozzle where it is subjected to zones of acceleration and zones of depression caused by jets of inert gases under high pressure.
  • the metal particles are super-cooled by contact with a gas under high pressure or a solid.
  • the cooling rate varies between 106 and 108 ° C / s.
  • a powder is thus obtained whose grain sizes vary from 0 to 50 ⁇ or from 0 to 120 ⁇ depending on the parameters.
  • the powder obtained according to the method described above with a cooling rate greater than 106 ° C / s comprises grains of silicon of less than 1 ⁇ or of silicon in the state of solid solution.
  • Powder production takes place in an airtight double-walled enclosure to prevent oxidation.
  • the powder thus obtained is collected in an aluminum or alloy container with a very thin precompression sand wall, under vacuum.
  • Extrusion is then carried out in a die by exclusively heating the tool to a temperature at most equal to 350 ° C.
  • the powder with its pot are jointly engaged in the die and extruded into tubes or bars.
  • the pot which is made of pure aluminum or an alloy produced by the same process does not introduce any disturbance in the composition of the alloy and above all does not introduce silicon grains of dimension greater than 1 ⁇ .
  • the size of the pot is chosen for a reduction coefficient in the sector between 10 and 20 preferably for a reduction coefficient of 13.
  • composition Al 72% Si: 22% Cu: 1.5% Ni: 1.5% Co: 1% Mg: 0.35% Fe: 0.35% Mn: 0.45% other 0.85% Vickers hardness (HV: 5kg) 130

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Powder Metallurgy (AREA)

Abstract

The process is characterised by a spraying operation comprising cooling by a forced contact solid particle or gas particle at high pressure, an operation of recovery of the powders without the precompression and an operation of extrusion in a die in which only the tool is heated. The process applies to the manufacture of motor vehicle components such as pistons, liners, connecting rods, gudgeon-pins, and the like.

Description

L'invention concerne un procédé de fabrication de pièces en alliage d'aluminium hypersilicié dont la composition en poids est comprise dans les fourchettes suivantes :
Fe 0,5 à 5 % Zn 0 à 0,5% Ni 0,5 à 5 % Ti 0 à 0,3 % P 0 à 1 % Si 19 à 30 % Mo 0,5 à 2 % Pb 0 à 0,2 % Co 0,5 à 5 % Cu 0,5 à 3 % Mn 0,2 à 1% Sn 0 à 0,5 % Mg 0 à 1,5 %
Les différents additifs intervenant dans cette composition exerçent les fonctions suivantes et pourraient être remplacés par d'autres agissant de manière équivalente.The invention relates to a method for manufacturing parts of hypersilicon aluminum alloy whose composition by weight is included in the following ranges:
Fe 0.5 to 5% Zn 0 to 0.5% Ni 0.5 to 5% Ti 0 to 0.3% P 0 to 1% Si 19 to 30% Mo 0.5 to 2% Pb 0 to 0, 2% Co 0.5 to 5% Cu 0.5 to 3% Mn 0.2 to 1% Sn 0 to 0.5% Mg 0 to 1.5%
The various additives involved in this composition exercise the following functions and could be replaced by others acting in an equivalent manner.

Le Si durcit, réduit le coefficient de dilatation, augmente la résistance à l'usure et améliore le frottement, renforce la structure et relève le module élastique.
Zn, Cu, Mg, Fe sont des durcisseurs.
Co, Ti, Mo, W, Va, B, Ta, Ca, P sont des affinants.
C, Sn améliorent le frottement.Si hardens, reduces the coefficient of expansion, increases resistance to wear and improves friction, strengthens the structure and raises the elastic modulus.
Zn, Cu, Mg, Fe are hardeners.
Co, Ti, Mo, W, Va, B, Ta, Ca, P are refiners.
C, Sn improve friction.

L'alliage ainsi défini présente une faible densité, un faible coefficient de dilatation et de bonnes caractéristiques mécaniques. Il trouve des applications dans les pièces chaudes et en mouvement des moteurs automobiles telle que pistons, chemises, bielles, axes de pistons, insert de culasse etc...The alloy thus defined has a low density, a low coefficient of expansion and good mechanical characteristics. It finds applications in hot and moving parts of automobile engines such as pistons, liners, connecting rods, piston pins, cylinder head insert, etc.

On sait que l'eutectique de l'alliage Al - Si se situe aux environs de 12 % de silicium et que le surplus de silicium cristallise en général pendant la solidification et le refroidissement, sous forme de cristaux de silicium très durs qui sont d'autant plus gros que la vitesse de refroidissement est plus faible.It is known that the eutectic of the Al - Si alloy is around 12% of silicon and that the surplus of silicon generally crystallizes during solidification and cooling, in the form of very hard silicon crystals which are of the larger the lower the cooling rate.

Les cristaux de silicium quand ils sont trop gros présentent des inconvénients évidents pour l'usinabilité, l'homogénéité et les caractéristiques mécaniques des pièces.Silicon crystals when they are too large have obvious drawbacks for the machinability, the homogeneity and the mechanical characteristics of the parts.

Le procédé qui fait l'objet de l'invention permet de réaliser des pièces en alliage d'aluminium hypersilicié comportant des cristaux de silicium de taille inférieure à 1 µ soit 1 millième de millimètre ou du silicium à l'état de solution solide.The process which is the subject of the invention makes it possible to produce parts in hypersilicon aluminum alloy comprising silicon crystals of size less than 1 μ, ie 1 thousandth of a millimeter or silicon in the state of solid solution.

On connait des procédés de fabrication de pièces en alliage d'aluminium hypersilicié utilisant les techniques de la métallurgie des poudres. Ces techniques consistent à transformer les lingots d'alliage en poudre par centrifugation et atomisation. Les grains de poudre dont les dimensions sont de l'ordre de 500 µ refroidissent plus vite que les lingots de telle sorte que les cristaux de silicium ont des dimensions allant de 5 à 25 µ . Lorsque les poudres sont forgées ou filées à chaud les grains grossissent dans un rapport 2 et atteignent 10 à 50 µ .Processes are known for manufacturing hypersilicon aluminum alloy parts using the techniques of powder metallurgy. These techniques consist of transforming the alloy ingots into powder by centrifugation and atomization. The grains of powder whose dimensions are of the order of 500 μ cool more quickly than the ingots so that the silicon crystals have dimensions ranging from 5 to 25 μ. When the powders are forged or hot spun, the grains grow in a ratio 2 and reach 10 to 50 µ.

Le procédé qui fait l'objet de l'invention définit d'une part des moyens pour obtenir une poudre dont les dimensions des grains varient de 0 à 120 µ avec des cristaux de silicium inférieurs à 1 µ ou de silicium en solution solide ; et d'autre part des moyens pour extruder des pièces à partir de cette poudre sans grossir les cristaux de silicium.The process which is the subject of the invention defines, on the one hand, means for obtaining a powder whose grain dimensions vary from 0 to 120 μ with silicon crystals of less than 1 μ or of silicon in solid solution; and on the other hand, means for extruding parts from this powder without enlarging the silicon crystals.

Le procédé selon l'invention comporte les étapes suivantes.The method according to the invention comprises the following steps.

On fait fondre l'alliage et on le porte à une température plus élevée que la température de fusion d'environ 80 à 180° C de manière à obtenir une viscosité appropriée. On forme à partir du liquide un jet qui traverse une buse calibrée. Le jet est ensuite pris en compte par une tuyère supersonique où il est soumis à des zones d'accélération et des zones de dépression provoquées par des jets de gaz inertes sous hautes pression.The alloy is melted and brought to a temperature higher than the melting temperature of about 80 to 180 ° C so as to obtain an appropriate viscosity. A jet is formed from the liquid which passes through a calibrated nozzle. The jet is then taken into account by a supersonic nozzle where it is subjected to zones of acceleration and zones of depression caused by jets of inert gases under high pressure.

Les particules métalliques sont sur-refroidies par contact avec un gaz sous haute pression ou un solide . La vitesse de refroidissement varie entre 10⁶ et 10⁸ ° C/s. On obtient ainsi une poudre dont les dimensions de grains varient de 0 à 50 µ ou de 0 à 120 µ selon les paramètres.The metal particles are super-cooled by contact with a gas under high pressure or a solid. The cooling rate varies between 10⁶ and 10⁸ ° C / s. A powder is thus obtained whose grain sizes vary from 0 to 50 μ or from 0 to 120 μ depending on the parameters.

La poudre obtenue selon le procédé décrit ci-dessus avec une vitesse de refroidissement supérieure à 10⁶ ° C/s comporte des grains de silicium de moins de 1 µ ou de silicium à l'état de solution solide.The powder obtained according to the method described above with a cooling rate greater than 10⁶ ° C / s comprises grains of silicon of less than 1 μ or of silicon in the state of solid solution.

La production de poudre s'effectue dans une enceinte hermétique à double parois afin d'éviter l'oxydation.Powder production takes place in an airtight double-walled enclosure to prevent oxidation.

La poudre ainsi obtenue est recueillie dans un récipient en aluminium ou alliage à paroi très fine sand précompression, sous vide.The powder thus obtained is collected in an aluminum or alloy container with a very thin precompression sand wall, under vacuum.

On procède ensuite à l'extrusion dans une filière en chauffant exclusivement l'outil à une température au plus égale à 350°C. La poudre avec son pot sont engagés conjointement dans la filière et extrudés en tubes ou en barres. Le pot qui est en aluminium pur ou en alliage réalisé par le même procédé n'introduit pas de perturbation dans la composition de l'alliage et surtout n'introduit pas de grains de silicium de dimension supérieure à 1 µ . La dimension du pot est choisie pour un coefficient de réduction dans la filière compris entre 10 et 20 préférentiellement pour un coefficient de réduction de 13.Extrusion is then carried out in a die by exclusively heating the tool to a temperature at most equal to 350 ° C. The powder with its pot are jointly engaged in the die and extruded into tubes or bars. The pot which is made of pure aluminum or an alloy produced by the same process does not introduce any disturbance in the composition of the alloy and above all does not introduce silicon grains of dimension greater than 1 μ. The size of the pot is chosen for a reduction coefficient in the sector between 10 and 20 preferably for a reduction coefficient of 13.

On peut citer à titre d'exemple les caractéristiques mécaniques et physiques obtenues pour un alliage à l'état brut de filage à la température ambiante.
composition Al : 72 % Si : 22 % Cu : 1,5 % Ni : 1,5 % Co : 1 % Mg : 0,35% Fe : 0,35% Mn : 0,45% autres 0,85%
Dureté Vickers (HV : 5kg) 130
Résistance à la traction (Rm) 450 M Pa
Limite élastique (Re) 400 M Pa
Module élastique (E) 82000 M Pa
Allongement à la rupture (A %) 2
Fatigue en flexion rotative (σc à 10⁸ cycles) 180 MPa
Coefficient de dilatation entre 20 et 300° C ≦αµρ¨ 17,5x10⁻⁶ m/m/°k
résilience : 8 Joules/cm2 By way of example, mention may be made of the mechanical and physical characteristics obtained for an alloy in the raw state of spinning at ambient temperature.
composition Al: 72% Si: 22% Cu: 1.5% Ni: 1.5% Co: 1% Mg: 0.35% Fe: 0.35% Mn: 0.45% other 0.85%
Vickers hardness (HV: 5kg) 130
Tensile strength (Rm) 450 M Pa
Elastic limit (Re) 400 M Pa
Elastic module (E) 82000 M Pa
Elongation at break (A%) 2
Rotational bending fatigue (σc at 10⁸ cycles) 180 MPa
Coefficient of expansion between 20 and 300 ° C ≦ αµρ¨ 17.5x10⁻⁶ m / m / ° k
resilience: 8 Joules / cm2

Claims (4)

1 - Procédé de fabrication de pièces en alliage d'aluminium hypersilicié de composition :
Si : 19 à 30 %      Fe : 0,3 à 5 %
Cu : 0,5 à 3 %      Mo : 0,5 à 2 %
Ni : 0,5 à 3 %      Mn : 0,2 à 1 %
Co : 0,5 à 5 %      Mg : 0 à 1,5 %
additionnés ou non d'éléments durcissants et/ou affinants jusqu'à 1 % chacun tels que B, C, Cb, Ce, Li, P, Pb, Sn, Ta, Ti, Va, W, Zn comportant :
- une opération d'atomisation pour transformer les lingots en poudre après fusion et écoulement du jet liquide à travers une buse calibrée ;
- une opération de récupération des poudres ;
- une opération d'extrusion à travers une filière,
caractérisé en ce que l'atomisation par écoulement du jet liquide à travers la buse calibrée comporte une opération d'accélération des particules par jet de gaz inerte et une opération de refroidissement à la vitesse de 10⁶ à 10⁸ °C/seconde par un contact forcé, particule/solide ou particule/gaz, sous haute pression.1 - Process for manufacturing parts of hypersilicon aluminum alloy of composition:
If: 19 to 30% Fe: 0.3 to 5%
Cu: 0.5 to 3% Mo: 0.5 to 2%
Ni: 0.5 to 3% Mn: 0.2 to 1%
Co: 0.5 to 5% Mg: 0 to 1.5%
with or without added hardening and / or refining elements up to 1% each such as B, C, Cb, Ce, Li, P, Pb, Sn, Ta, Ti, Va, W, Zn comprising:
- an atomization operation to transform the ingots into powder after fusion and flow of the liquid jet through a calibrated nozzle;
- a powder recovery operation;
- an extrusion operation through a die,
characterized in that the atomization by flow of the liquid jet through the calibrated nozzle comprises an operation of acceleration of the particles by jet of inert gas and a cooling operation at the speed of 10⁶ to 10⁸ ° C / second by forced contact , particle / solid or particle / gas, under high pressure. 2 - Procédé selon la revendication 1, caractérisé en ce que la récupération comporte une opération de conditionnement des poudres sous vide, sans précompression en pots à parois fines, l'aluminium ou d'alliage.2 - Process according to claim 1, characterized in that the recovery comprises an operation for packaging the powders under vacuum, without precompression in pots with thin walls, aluminum or alloy. 3 - Procédé selon la revendication 1 ou 2, caractérisé en ce que les poudres sont extrudées dans une filière dont seul l'outil est préchauffé à une température au plus égale à 350 °C, la poudre restant à température ambiante.3 - Process according to claim 1 or 2, characterized in that the powders are extruded in a die in which only the tool is preheated to a temperature at most equal to 350 ° C, the powder remaining at room temperature. 4 - Procédé selon la revendication 3, caractérisé en ce que les pots de conditionnement sont dimensionnés pour une réduction par la filière comprise entre 10 et 20.4 - Method according to claim 3, characterized in that the packaging pots are dimensioned for reduction by the die between 10 and 20.
EP87402094A 1986-09-22 1987-09-21 Process for manufacturing shaped bodies from hypereutectic aluminium-silicon alloys, starting from powders obtained by rapid cooling Expired - Lifetime EP0265307B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8613207A FR2604186A1 (en) 1986-09-22 1986-09-22 PROCESS FOR MANUFACTURING HYPERSILICALLY ALUMINUM ALLOY PARTS OBTAINED FROM COOLED COOLED POWDERS AT HIGH SPEED
FR8613207 1986-09-22

Publications (2)

Publication Number Publication Date
EP0265307A1 true EP0265307A1 (en) 1988-04-27
EP0265307B1 EP0265307B1 (en) 1991-07-17

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EP87402094A Expired - Lifetime EP0265307B1 (en) 1986-09-22 1987-09-21 Process for manufacturing shaped bodies from hypereutectic aluminium-silicon alloys, starting from powders obtained by rapid cooling

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DE (1) DE3771437D1 (en)
FR (1) FR2604186A1 (en)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341714A1 (en) * 1988-05-12 1989-11-15 Sumitomo Electric Industries, Ltd. Method of forming large-sized aluminum alloy product
EP0366134A1 (en) * 1988-10-27 1990-05-02 Toyo Aluminium Kabushiki Kaisha Aluminum alloy useful in powder metallurgy process
US4959195A (en) * 1988-05-12 1990-09-25 Sumitomo Electric Industries, Ltd. Method of forming large-sized aluminum alloy product
EP0398449A1 (en) * 1989-05-19 1990-11-22 KBM-Metaalindustrie B.V. Aluminium-strontium master alloy
EP0410417A1 (en) * 1989-07-28 1991-01-30 Ube Industries, Ltd. Method for production powder metallurgy alloy
EP0503951A1 (en) * 1991-03-14 1992-09-16 Tsuyoshi Masumoto Wear-resistant aluminium alloy and method for working thereof
EP0508426A2 (en) * 1991-04-12 1992-10-14 Hitachi, Ltd. Highly ductile sintered aluminum alloy, method for production thereof and use thereof
EP0524527A1 (en) * 1991-07-22 1993-01-27 Ykk Corporation Compacted and consolidated aluminium-based alloy material and production process thereof
EP0526079A1 (en) * 1991-07-22 1993-02-03 Toyo Aluminium Kabushiki Kaisha Hypereutectic aluminium-silicon alloys
EP0535593A1 (en) * 1991-10-01 1993-04-07 Hitachi, Ltd. Method of manufacturing sintered aluminum alloy parts
EP0592665A4 (en) * 1990-10-31 1993-11-19 Sumitomo Electric Industries Hypereutectic aluminum/silicon alloy powder and production thereof.
EP0577062A1 (en) * 1992-06-29 1994-01-05 Sumitomo Electric Industries, Limited Oil pump made of aluminum alloys
EP0622469A1 (en) * 1993-04-30 1994-11-02 Toyota Jidosha Kabushiki Kaisha Aluminum alloy powder for sliding members and aluminum alloy therefor
EP1065382A3 (en) * 1999-06-29 2002-07-24 DaimlerChrysler AG Rotor for oil gear pump made from aluminium powder
WO2006042509A1 (en) * 2004-10-15 2006-04-27 Peak Werkstoff Gmbh Aluminium-based alloy and moulded part consisting of said alloy
CN102220535A (en) * 2011-06-07 2011-10-19 江苏大学 Zero expansion composite material
WO2012110788A2 (en) 2011-02-18 2012-08-23 Brunel University Method of refining metal alloys
CN113802034A (en) * 2021-08-23 2021-12-17 合肥工业大学 Heat-resistant aluminum alloy for piston, preparation method and performance

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FR2343895A1 (en) * 1976-03-10 1977-10-07 Pechiney Aluminium PROCESS FOR MANUFACTURING HOLLOW BODIES IN SILICON ALUMINUM ALLOYS BY SHELL SPINNING
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EP0100470A2 (en) * 1982-07-12 1984-02-15 Showa Denko Kabushiki Kaisha Heat-resistant, wear-resistant, and high-strength aluminum alloy powder and body shaped therefrom

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1121425A (en) * 1954-03-30 1956-08-14 Metallgesellschaft Ag Manufacturing process for friction parts of machines and in particular bearings made of aluminum and silicon alloy
FR2343895A1 (en) * 1976-03-10 1977-10-07 Pechiney Aluminium PROCESS FOR MANUFACTURING HOLLOW BODIES IN SILICON ALUMINUM ALLOYS BY SHELL SPINNING
FR2374428A1 (en) * 1976-12-17 1978-07-13 Aluminum Co Of America METAL ARTICLE, POWDER ALLOY AND METHOD FOR MANUFACTURING THE METAL ARTICLE FROM AN ALUMINUM-BASED POWDERED ALLOY CONTAINING SILICON AND MANGANESE
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Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4959195A (en) * 1988-05-12 1990-09-25 Sumitomo Electric Industries, Ltd. Method of forming large-sized aluminum alloy product
EP0341714A1 (en) * 1988-05-12 1989-11-15 Sumitomo Electric Industries, Ltd. Method of forming large-sized aluminum alloy product
EP0366134A1 (en) * 1988-10-27 1990-05-02 Toyo Aluminium Kabushiki Kaisha Aluminum alloy useful in powder metallurgy process
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EP0265307B1 (en) 1991-07-17
DE3771437D1 (en) 1991-08-22
FR2604186A1 (en) 1988-03-25

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