EP2065108B1 - Particules métalliques, procédé de leur fabrication et procédé de fabrication d'une composante structurale d'une vehicule à partir de ces particules métalliques - Google Patents

Particules métalliques, procédé de leur fabrication et procédé de fabrication d'une composante structurale d'une vehicule à partir de ces particules métalliques Download PDF

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Publication number
EP2065108B1
EP2065108B1 EP09155334A EP09155334A EP2065108B1 EP 2065108 B1 EP2065108 B1 EP 2065108B1 EP 09155334 A EP09155334 A EP 09155334A EP 09155334 A EP09155334 A EP 09155334A EP 2065108 B1 EP2065108 B1 EP 2065108B1
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EP
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Prior art keywords
magnesium
particles
container
metal particles
melt
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Expired - Fee Related
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EP09155334A
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German (de)
English (en)
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EP2065108A1 (fr
Inventor
Yutaka Yano
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Subaru Corp
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Fuji Jukogyo KK
Fuji Heavy Industries Ltd
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Publication of EP2065108A1 publication Critical patent/EP2065108A1/fr
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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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/008—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of engine cylinder parts or of piston parts other than piston rings
    • 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
    • B22F1/05—Metallic powder characterised by the size or surface area of the particles
    • 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
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • 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
    • 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
    • B22F2998/10—Processes characterised by the sequence of their steps

Definitions

  • the present invention relates to magnesium-based metal particles comprising magnesium silicide dispersed therein, a process for manufacturing the magnesium-based metal particles, process for manufacturing components for use in a vehicle, and components manufactured thereby.
  • Magnesium is widely used for preparing so-called light alloy because of the low specific gravity thereof. It is also known that the mechanical properties such as a rigidity of a product made from magnesium alloy are improved when the material magnesium alloy contains therein magnesium silicide (Mg 2 Si) particles in a dispersed state. In this case, the smaller the mean diameter of the magnesium silicide particles, the more increases the mechanical properties of the magnesium alloy. For instance, magnesium alloy containing magnesium silicide particles with a mean diameter of 10 ⁇ m or less has extremely good mechanical properties.
  • the magnesium silicide particles are formed in a magnesium metal, e.g., by solidifying magnesium wherein silicone is dissolved.
  • particles made of pure magnesium or Mg-Al-Zn alloy can be obtained by gas atomization method.
  • a metal melt is scattered into small particles by applying a gas jet stream to the molten metal.
  • the melt When the melt is subjected to atomization, it is necessary that the metal is maintained in a liquid form, for forming particles without blowholes, and to appropriately receive the gas jet stream. Moreover, it is also necessary that the melt is heated to a temperature which is higher than the melting point by about 300 °C for satisfactory atomization.
  • the melting point is about 651 °C, and the boiling point is about 1090 °C.
  • the atomization was applicable to the pure magnesium.
  • magnesium melt containing 5 to 10 wt.% of silicon therein by a usual manner.
  • magnesium silicide particles formed in the melt grow by the end of the solidification. In some cases, it is possible magnesium silicide particles with diameters of 100 ⁇ m or more are formed.
  • the magnesium alloy obtained in this way does not have excellent mechanical properties. When the magnesium alloy in a semi-fused state is subjected to injection molding, the mechanical properties of the alloy are not good.
  • Japanese Kokai Publication 2000-17352 discloses a casting method wherein finely-divided magnesium silicide particles with diameters of 10 ⁇ m or less are dispersedly formed in a magnesium alloy.
  • a preform is obtained by adding silicon particles to magnesium matrix, and the preform is impregnated with a melt of magnesium alloy. Accordingly, in-situ reaction between the silicon particles and magnesium alloy occurs, and finely-divided magnesium silicide particles are formed in the magnesium alloy.
  • Japanese Kokai Publication 2004-225080 discloses technology for dispersing magnesium silicide particles in a magnesium alloy by powder metallurgy. For using metal powders as raw materials, pre-treatments such as particle diameter treatment, compression molding, sintering and the like are necessary.
  • Japanese Kokai Publication 2004-225080 discloses that magnesium powder and silicon powder, and optionally aluminum powder, are mixed by using a ball mill, whereby a powder mixture is obtained. Then, the thus obtained powder mixture is solidified by applying pressure thereto, and the solidified powder mixture is heated in the atmosphere of an inert gas. The heating operation causes a solid phase reaction between magnesium and silicon, whereby magnesium silicide is formed. Furthermore, the solidified workpiece is densified by warm processing. Thus, magnesium silicide particles with diameters of 1 to 30 ⁇ m are formed in the magnesium alloy.
  • magnesium silicide to be formed has to be subdivided by the use of additional equipment. Further, the magnesium melt containing silicon has a high viscosity, and the casting is sometimes difficult depending on size and shape of a preform/product to obtain. In addition to the above, a primary crystal formed in the course of the solidification of the melt could lead to the formation of a metal alloy with a course structure, which may not have a satisfactory rigidity/strength.
  • Japanese Kokai Publication 2004-225080 it is necessary to use a ball mill to mix raw material powders, so that the raw material powders cannot always be maintained to be spherical.
  • particles with irregular forms are formed based on the disclosure of Japanese Kokai Publication 2004-225080 , which is not always satisfactory for good compaction.
  • the irregularly shaped particles have to be subjected to classification and particle diameters adjustment, prior to the use.
  • different kinds of powders have to be mixed at the stage of producing the product.
  • WO 03/105983 A2 discloses metal matrix composites with intermetallic reinforcements.
  • a reinforced metal composite consists of a metal matrix element. As least one of the elements of the intermetallic particles is the same as the matrix material.
  • the metallic powder particles are produced by gas atomization and are further processed to form billets which are then further hot extruded.
  • EP 1 433 862 A1 discloses a magnesium base composite material.
  • the manufacturing method for such material includes the steps of blending matrix powder containing Mg and Si powders to obtain a blended matter, applying a plasticization treatment to the resulting blended matter to form a solid body, heating the solid body and applying a warm plasticization treatment to the heat solid body.
  • Another object of the present invention is to provide a process for manufacturing metal particles approximately in the form of spheres containing therein uniformly dispersed magnesium silicide particles having a mean diameter of about 1 ⁇ m to about 10 ⁇ m, which is easy to perform and cost effective.
  • the temperature of the mixture heated in the container is in the range of 940 °C to 960 °C, and the outlet port of the container is set to have a diameter in the range of 1.0 mm to 2.0 mm.
  • the pressure in the container is higher than in the chamber by 0.4 bar or more.
  • the magnesium silicide particles are uniformly dispersed in the metal particles when the metal melt was flowed out of the container under the above-mentioned conditions.
  • a high-frequency induction furnace is used as the container.
  • the high-frequency induction furnace it is possible to easily maintain a large quantity of metal melt at a predetermined temperature, and hence to produce a large amount of metal particles continuously in a stable condition.
  • a still another object of the present invention is to provide a process for manufacturing a vehicle component, which is easy to perform and economical.
  • the metal particles are pre-treated. For instance, it is possible to classify the particles depending on the diameters.
  • the vehicle component obtained by use of the production process of the invention are light weight because of the formulation and has good mechanical properties, such as excellent fatigue strength at about 300 °C.
  • a piston for engine having excellent strength, in particular excellent fatigue strength at high temperatures, can be obtained by the method of the present invention.
  • Fig. 1 is a diagram for explaining an internal structure of a magnesium-based metal particle 10 according to the present invention.
  • the magnesium-based metal particles 10 of the invention have approximately spherical shapes having a mean diameter A of 40 to 100 ⁇ m.
  • the magnesium-based metal particle 10 according to one embodiment (not part of the invention as claimed) is prepared from 90 to 95 wt. % of magnesium and 5 to 10 wt.% of silicon, as starting materials.
  • the magnesium-based particle 10 is formed from magnesium metal 12 and finely-divided magnesium silicide particles 14 uniformly dispersed in the magnesium metal 12, and the magnesium silicide (Mg 2 Si) particles 14 are formed as solid particles having a mean diameter B of 1 ⁇ m to 10 ⁇ m, by a reaction between the previously mixed magnesium and silicon. It is preferable that all the amount of 5 to 10 wt. % of silicon is converted to the magnesium silicide particles 14. In this way, the magnesium silicide particles 14 are finely dispersed in the magnesium metal matrix 12.
  • the magnesium-based metal particles 10 are applicable to powder metallurgy, and many products or preforms are prepared therefrom. Such product made from the magnesium alloy material has good mechanical properties including excellent fatigue strength at high temperatures. This is because the nnely-divided magnesium silicide particles 14 are uniformly dispersed in the metal particles 10, and a stress applied to the particles 10 are uniformly dispersed.
  • the magnesium-based metal particles 10 of the present invention are ready to use for powder metallurgy, because the metal particles 10 is already in a premix state containing magnesium and magnesium silicide uniformly dispersed therein.
  • the metal particles 10 can be tightly compacted when pressure is applied thereto because of the spherical or approximately spherical shapes. In other words, compressibility of the metal particles 10 of the invention is greater than that with irregularly shaped particles.
  • the metal particles 10 are subjected to compression molding, sintering and then forging, the uniform dispersion of finely-divided magnesium silicide particles in the metal particles 10 is maintained, whereby a product with good mechanical properties can be obtained.
  • the magnesium-based metal particles 10 is obtained from the starting materials including 80 to 94 wt.% of magnesium, 5 to 10 wt.% of silicon, and 1 to 10 wt.% of aluminum. Based on the above formulation, magnesium-based metal particles 10 are obtained as particles containing magnesium-aluminum alloy as a matrix 12 and magnesium silicide particles 14 dispersed in the alloy matrix 12. It is also possible to adjust the mechanical properties of the depending on the usage of the product obtained therefrom, by adjusting the aluminum content. A satisfactory compaction property can be carried out also in this case. Further, when adding aluminum, it is possible to increase the handling property of the molding material, and the mechanical properties such as wear resistance and strength of the product, in comparison with the materials made from magnesium and silicon.
  • Fig. 2 is a schematic cross-sectional view of an apparatus 20 for producing metal particles 10 according to the present invention.
  • the apparatus 20 itself is commonly used in atomization method, for example, for pure magnesium metal or magnesium alloy based on magnesium, aluminum and zinc.
  • metal particles 10 are obtained by applying a gas jet stream 36 from gas injection nozzles 30 against the metal melt 32 discharged from a container 20 to scatter/disperse the melt 32 in the air, and solidifying the melt.
  • the solidification occurs by a rapid temperature decrease of the melt after the discharge from the container 20.
  • a metal melt containing 5 to 10 wt.% of silicon is stably atomized, and finally metal particles 10 as shown in Fig. 1 is obtained.
  • the atomization apparatus 20 includes a fusing container 22 and an atomization chamber 40 provided below the fusing container 22.
  • the container 22 is formed as a crucible for fusing the metal particles 10.
  • the open end of the fusing container 22 is sealed by a cover 23 for appropriately controlling the pressure inside the container 22. Furthermore, a high frequency coil 26 is provided around the container 22 for heating the container 22 and maintaining the temperature for a predetermined period. It is possible to provide a thermometer (not shown) for measuring the temperature in the container 22. At the bottom of the container 22, an outlet port 28 is formed, which allows the melt 32 to flow therethrough. The atomization chamber 40 is provided below the container 22. Around the outlet port 28, a heater is provided (not shown) for appropriately heat the outlet port 28 so as to prevent the melt 32 to solidify at the outlet port 28.
  • a movable stopper 24 in the form of a bar is provided by penetrating the center of the cover 23, for opening and closing the outlet port 28 of the container 22. By moving the stopper 24 up and down, the outlet port 28 is closed and is made open.
  • the injection nozzles 30 are provided nearby the outlet port 28 for injecting a gas against the metal melt 32. For instance, argon gas with a high speed is blown for the collision with the metal melt 32, and hence the metal melt 32 is scattered, whereby particles of metal melt 32 are obtained. Then, the particles are solidified, and metal particles 34 having uniformly dispersed finely-divided magnesium silicide particles therein are obtained.
  • a stirring mechanism in the container 22, for stirring the metal melt contained therein so as to obtain a homogeneous melt.
  • the stirring mechanism are commonly used mechanical stirring apparatuses and a stirring unit wherein blowing gas is utilized.
  • a high-frequency induction furnace instead of using the container 22 and the higla-frequency coil 26 individually.
  • the high-frequency induction furnace has a capacity to contain a relatively large amount of melt and to maintain the melt at a predetermined temperature. Therefore, it is possible to produce a large amount of metal particles 34, continuously.
  • the container 22 has a weighing unit which is, for instance, for measuring the entire weight of the container 22 containing the melt 32 therein. By using such weighing unit, the flow rate of the melt 32, and the residual amount of the melt 32 can be accurately measured.
  • Figs. 3A to 3C are schematic cross-sectional views of the apparatus 20 for use in the present invention, for explaining the procedure for producing metal particles 34.
  • Fig. 3A shows that the container 22 is charged with a raw material 31 which is a mixture of solid magnesium (90 to 95 wt.%) and solid silicon (5 to 10 wt.%).
  • a raw material 31 which is a mixture of solid magnesium (90 to 95 wt.%) and solid silicon (5 to 10 wt.%).
  • the outlet port 28 of the container 22 is closed by the stopper 24.
  • the air in the container 22 and the atomization chamber 40 are replaced by an inert gas such as argon.
  • the mixture in the container is heated by the high-frequency coil 26 provided around the container 22 optionally with starring the mixture, to obtain a homogenous metal melt 32 the container 22.
  • the metal melt 32 is maintained at a temperature which is greater than the solidification point and is lower than the boiling point, e.g., 950 °C (charging and fusing step, Fig. 3A ). It is also possible to prepare the metal melt 32 in advance, and to introduce the fused material into the container 22.
  • the container 22 is sealed up for changing the pressure inside the container 22.
  • the container In the conventional use of the atomization chamber, the container is set to have an internal pressure higher than the atomization chamber by about 0.3 bar. In the present invention, however, it is necessary to set the inner part 38 of the container 22 to have a pressure higher than in the atomization chamber 40 by 0.4 bar or more, preferably in the range of 0.4 bar to 1.5 bar. It is preferable that the atomization chamber 40 is substantially in vacuum.
  • the outlet port 28 is heated by the heater 31.
  • the argon gas jet stream is preliminarily started to run. (pressure increasing and fusing step, Fig. 3B ).
  • the stopper 24 is pushed down for discharging the metal melt 32 from the outlet port 28. Since the internal pressure of the container 22 has been increased, the metal melt 32 can be flowed out of the outlet port 28 in spite of the high viscosity.
  • Argon gas jet stream is injected from the gas injection nozzles 30 against the discharged metal melt 32.
  • the melt 32 which received the gas jet stream is scattered in the form of particles with a mean diameter of 40 to 100 ⁇ m.
  • the metal melt is solidified (scattering and solidifying step, Fig. 3C ). Accordingly, magnesium-based metal particles 34 are manufactured in such a state that minute magnesium silicide particles with diameters of 1 to 10 ⁇ m are uniformly dispersed in the magnesium-based metal particles.
  • the outlet port 28 of the container 22 is closed after producing the metal particles 34.
  • the pressure of the inner part 38 is lowered, the gas injection from the injection unit 39 is stopped.
  • the container can be made ready for further production.
  • the metal particles 10 are readily and economically prepared.
  • the metal melt 32 it is possible to maintain the metal melt 32 at a temperature in the range of 940 °C to 970 °C, more preferably in the range of 940 °C to 960 °C.
  • the temperature of the melt 32 is set in the range of 940 to 960 °C, and the outlet port 28 of the container 22 is set in the range of 1.0 to 2.0, the melt 32 can be smoothly discharged from the atomization chamber 40.
  • the temperature of the metal melt 32 and the diameter of the outlet port 28 are appropriately chosen. By obtaining appropriate flow of the melt through the outlet port 28 with appropriate diameters, it is possible to obtain finely-divided metal particles with narrow particle distribution, wherein minute magnesium silicide particles are uniformly dispersed.
  • the metal melt contains 80 to 94 wt.% of magnesium, 5 to 10 wt.% of silicon, and 1 to 10 wt.% of aluminum.
  • magnesium-based metal particles having a mean particle diameter of 40 to 100 ⁇ m containing magnesium silicide particles having 1 to 10 ⁇ m uniformly dispersed therein can be obtained.
  • metal particles 34 with diameters of more than 100 ⁇ m, for example, in the range of 200 to 600 ⁇ m can also be manufactured by changing the flow rate. In this case, it is possible to obtain particles containing uniformly dispersed magnesium silicide therein.
  • the metal particles 34 are used for preparing vehicle components.
  • the vehicle components can be easily and quickly manufactured.
  • the metal particles of the present invention are useful for preparing vehicle components such as a piston for an engine.
  • the metal particles 10 can be directly charged into a mold for a compression molding, and pressure is applied to the metal particles. Accordingly, the metal particles are plastically deformed, and hence a molding is produced.
  • the metal particles to be used do not have a uniform particle diameters, it is possible to classify the particle size and to use particles with narrow particle size distribution.
  • it is desired to use particles with different particle diameters, i.e., broad particle distribution it is possible to blend particles with different diameters.
  • the preform obtained from the metal particles of the present invention is heated to a temperature lower than the melting point of the mixture of magnesium and silicone, for sintering the preform. During the sintering process, particles are fused to each other. As a result, the density of the sintered preform is increased (densification), and hence the strength of the product is increased.
  • the sintered preform which is usually porous, is forged so that the voids are eliminated, and the rigidity of the product is increased.
  • the engine made from the metal particles of the invention wherein finely-divided silicide particles are uniformly dispersed shows excellent fatigue strength at high temperatures. Moreover, the light-weight of the piston reduces a load to be applied to the engine.
  • Metal particles are prepared based on the procedure explained with referring to Figs. 3A to 3C by using the apparatus shown in the figures.
  • the opening of the outlet port was set to have a diameter of 1.5 mm.
  • Example 1 Pressure was applied to the inside of the sealed fusing container so as to make the pressure inside the fusing container is 0.4 bar higher (Example 1), 1.5 bar higher (Example 2), and 0.3 bar higher (Comparative Example 1), with respect to the atomization chamber.
  • magnesium-based metal particles with a mean diameter of about 50 ⁇ m were produced in a stable condition.
  • silicon initially mixed to magnesium in a finely-dispersed state was completely converted into magnesium silicide particles, and the magnesium silicide particles with diameters of 5 ⁇ m or less were uniformly dispersed in the magnesium-based metal particles.
  • pistons for vehicle engines were produced via treatment of the metal particles, the compression molding of the metal particles, sintering and forging the preform.
  • the pistons had a fatigue strength of in the range of 25 ⁇ 25 MPa to 35 ⁇ 35 MPa at a temperature of 300 °C.

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

Claims (7)

  1. Particules métalliques à base de magnésium (10) sous la forme de sphères ayant un diamètre médian de 40 µm à 100 µm, composées de :
    magnésium métallique (12) et particules de siliciure de magnésium (14) ayant un diamètre médian de 1 µm à 10 µm dispersées uniformément dans le magnésium métallique (12),
    les particules métalliques à base de magnésium (10) étant obtenues en mélangeant 80 % en poids à 94 % en poids de magnésium, 5 % en poids à 10 % en poids de silicone et 1 % en poids à 10 % en poids d'aluminium, et les particules de siliciure de magnésium (14) étant formées dans les particules métalliques (10) par la réaction du magnésium et du silicone.
  2. Procédé de fabrication de particules métalliques à base de magnésium (10) sous la forme de sphères contenant du magnésium métallique (12) renfermant des particules de siliciure de magnésium dispersées uniformément (14), ayant un diamètre médian de 1 µm à 10 µm, comprenant :
    le chargement d'un récipient (22) avec un mélange de 80 % en poids à 94 % en poids de magnésium, 5 % en poids à 10 % en poids de silicone et 1 % en poids à 10 % en poids d'aluminium sous une atmosphère gazeuse inerte,
    le chauffage du mélange à une température dépassant la température de solidification du mélange et inférieure à sa température d'ébullition,
    le maintien de la température du mélange,
    l'augmentation de la pression interne du récipient (22) par rapport à la pression interne d'une chambre (40) se trouvant sous le récipient (22) de 0,4 bar ou plus,
    la décharge d'une coulée du mélange d'un orifice de sortie (28) du récipient (22) vers la chambre (40),
    l'application d'un jet par courant gazeux (36) à la coulée déchargée de l'orifice de sortie (28) de manière à diffuser la coulée sous la forme de particules ayant un diamètre médian de 40 µm à environ 100 µm, et
    la solidification des particules.
  3. Procédé de fabrication de particules métalliques (10) sous la forme de sphères y contenant des particules de siliciure de magnésium dispersées uniformément selon la revendication 2, dans lequel la température du mélange chauffé dans le récipient (22) se situe dans la plage de 940°C à 960°C, et l'orifice de sortie (28) du récipient (22) est réglé de manière à avoir un diamètre situé dans la plage de 1,0 mm à 2,0 mm.
  4. Procédé de fabrication de particules métalliques (10) sous la forme de sphères y contenant des particules de siliciure de magnésium dispersées uniformément selon l'une quelconque des revendications 2 ou 3, dans lequel la pression dans le récipient (22) est supérieure que celle de la chambre (40) de 0,4 bar à 1,5 bar.
  5. Procédé de fabrication de particules métalliques (10) sous la forme de sphères y contenant des particules de siliciure de magnésium dispersées uniformément selon l'une quelconque des revendications 2 à 4, dans lequel un four à induction à haute fréquence est utilisé comme récipient (22).
  6. Procédé de fabrication d'une composante structurale d'un véhicule, comprenant :
    la soumission des particules métalliques à base de magnésium (10) de la revendication 1 au moulage par compression pour obtenir un moulage ;
    le frittage du moulage par chauffage du moulage à une température inférieure à la température de fusion du mélange pour obtenir un matériau fritté, et
    le forgeage du matériau fritté en le soumettant à la chaleur.
  7. Procédé de fabrication d'une composante structurale d'un véhicule selon la revendication 6, dans lequel la composante structurale de véhicule est un piston destiné à un moteur.
EP09155334A 2005-08-25 2006-08-21 Particules métalliques, procédé de leur fabrication et procédé de fabrication d'une composante structurale d'une vehicule à partir de ces particules métalliques Expired - Fee Related EP2065108B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005244247A JP5079225B2 (ja) 2005-08-25 2005-08-25 マグネシウムシリサイド粒を分散した状態で含むマグネシウム系金属粒子からなる金属粉末を製造する方法
EP06119255A EP1757387B1 (fr) 2005-08-25 2006-08-21 Particules métalliques, procédé de leur fabrication et procédé de fabrication d'une composante structurale d'une vehicule à partir de ces particules métalliques

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EP06119255.5 Division 2006-08-21
EP06119255A Division EP1757387B1 (fr) 2005-08-25 2006-08-21 Particules métalliques, procédé de leur fabrication et procédé de fabrication d'une composante structurale d'une vehicule à partir de ces particules métalliques

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EP2065108A1 EP2065108A1 (fr) 2009-06-03
EP2065108B1 true EP2065108B1 (fr) 2011-01-26

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EP06119255A Expired - Fee Related EP1757387B1 (fr) 2005-08-25 2006-08-21 Particules métalliques, procédé de leur fabrication et procédé de fabrication d'une composante structurale d'une vehicule à partir de ces particules métalliques
EP09155334A Expired - Fee Related EP2065108B1 (fr) 2005-08-25 2006-08-21 Particules métalliques, procédé de leur fabrication et procédé de fabrication d'une composante structurale d'une vehicule à partir de ces particules métalliques

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US (2) US20070048167A1 (fr)
EP (2) EP1757387B1 (fr)
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DE (2) DE602006006763D1 (fr)

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JP2009085234A (ja) * 2007-09-27 2009-04-23 Ntn Corp 滑り軸受およびその製造方法
US8017072B2 (en) * 2008-04-18 2011-09-13 United Technologies Corporation Dispersion strengthened L12 aluminum alloys
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JP5079225B2 (ja) 2012-11-21
EP2065108A1 (fr) 2009-06-03
EP1757387B1 (fr) 2009-05-13
EP1757387A1 (fr) 2007-02-28
US20100226810A1 (en) 2010-09-09

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