WO2001046486A1 - Procede de production d'un materiau composite a base de metal - Google Patents

Procede de production d'un materiau composite a base de metal Download PDF

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Publication number
WO2001046486A1
WO2001046486A1 PCT/JP2000/007745 JP0007745W WO0146486A1 WO 2001046486 A1 WO2001046486 A1 WO 2001046486A1 JP 0007745 W JP0007745 W JP 0007745W WO 0146486 A1 WO0146486 A1 WO 0146486A1
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WIPO (PCT)
Prior art keywords
metal
aluminum
matrix
producing
composite material
Prior art date
Application number
PCT/JP2000/007745
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English (en)
Japanese (ja)
Inventor
Toshiaki Kimura
Hideo Nakae
Hideya Yamane
Hideki Yamaura
Original Assignee
Hitachi Metals, Ltd.
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 Hitachi Metals, Ltd. filed Critical Hitachi Metals, Ltd.
Priority to EP00971764A priority Critical patent/EP1178127A1/fr
Priority to CA002364391A priority patent/CA2364391A1/fr
Publication of WO2001046486A1 publication Critical patent/WO2001046486A1/fr

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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
    • C22C1/10—Alloys containing non-metals
    • C22C1/1036—Alloys containing non-metals starting from a melt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0405—Rotating moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
    • 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

Definitions

  • the present invention relates to a method of manufacturing a metal matrix composite using an aluminum alloy or the like as a matrix, and more particularly to a method of manufacturing a metal matrix composite by a pressureless infiltration method.
  • Metal matrix composites consist of a matrix metal with basic properties such as strength, ductility, and toughness, combined with various reinforcing fillers.In many cases, reinforcing fillers such as ceramic long fibers, short fibers or particles are used. Parts for transport equipment that are becoming lighter in weight because they combine the formability and thermal conductivity of matrix metal alone with the rigidity, wear resistance, and low coefficient of thermal expansion of reinforced fillers. It is used for a variety of applications, such as substrates for electronic components that require a low coefficient of thermal expansion.
  • the metal matrix composite includes a dispersion strengthened composite material in which a reinforcing filler such as ceramics is dispersed in an alloy matrix such as aluminum or magnesium.
  • a reinforcing filler such as ceramics
  • an alloy matrix such as aluminum or magnesium.
  • aluminum alloy is often used as a matrix because it is lightweight and inexpensive.
  • the strength, rigidity, abrasion resistance, and heat can be obtained by adding reinforced fillers in addition to the weight reduction characteristic of light alloys.
  • Various properties such as expansion coefficient, density and high temperature strength are improved. The extent to which the properties are improved greatly varies depending on the composition ratio of the alloy components and the reinforcing filler, the shape and size of the reinforcing filler, and the processing method used to produce the dispersion-reinforced composite material.
  • Powder metallurgy involves mixing a powdered matrix metal with a reinforcing filler such as long fibers, short fibers or particles and performing sintering or hot pressing after cold forming. This is a method for producing a composite material. Since powder metallurgy is usually performed by press molding, it is not suitable for producing a complicated shape, and it is necessary to target a product having a relatively simple shape. In addition, since molding is performed at a high temperature and a high pressure, there is a problem that it is costly especially for a large product.
  • the molten metal stirring method is a method in which a reinforcing material is added to a molten metal and stirred at a high speed for a long time to entangle and disperse the reinforcing material in a matrix metal melt to produce a composite material.
  • This method can produce a large number of composite ingots at relatively low cost, but it is very difficult to obtain a partial composite in which only part of the product is composite.
  • the infiltration method is a method of producing a composite material by infiltrating molten metal into gaps between reinforcing fillers. According to this method, a composite material having a complicated final shape can be manufactured.
  • the SiC particles need to have good wettability to the aluminum alloy. Good wettability means that the contact angle of the liquid with the solid is small, and the liquid easily spreads on the solid surface.
  • the SiC particles have poor wettability to the aluminum alloy, the penetration of the aluminum alloy between the SiC particles does not occur spontaneously at atmospheric pressure. In other words, SiC particles are repelled by the molten aluminum alloy, and a homogeneous composite cannot be obtained.
  • the infiltration method is a pressurized infiltration method in which a molten metal is made to penetrate a matrix metal melt at a high pressure into a porous molded body of a reinforcing filler such as ceramics to produce a composite material.
  • a non-pressure infiltration method in which a composite material is produced by infiltrating a matrix metal melt with the above method.
  • a partially composite material can be obtained by infiltrating a molten metal of a light alloy such as aluminum at a high pressure into a molded body of the reinforcing filler.
  • a porous body is formed by compression-molding a mixture of a fine piece of an oxide of a first metal (for example, NiO powder) and a reinforcing filler (for example, silicon carbide whisker).
  • a porous body is formed by compression-molding a homogeneous mixture of a fine piece of the first metal oxide and a reinforcing filler, and the matrix metal melt is formed using a high-pressure forming apparatus.
  • the production cost is high because it penetrates into the porous body.
  • a composite material cannot be obtained without pressure, and the manufacturing method is limited to the high-pressure manufacturing method or the centrifugal manufacturing method.
  • Japanese Patent No. 2801302 discloses a so-called PRIMAX for manufacturing a metal-reinforced filler composite material by infiltrating a matrix metal such as aluminum into a reinforcing filler without applying pressure.
  • TM method is disclosed. Specifically, in this method, a mixture of a permeation enhancer such as magnesium powder and a reinforcing filler such as silicon carbide or a preform thereof is placed in a non-reactive container, and the mixture or the preform is placed adjacent to the mixture or the preform.
  • the molten matrix metal spontaneously penetrates the reinforced filler.
  • Manufacture metal-reinforced filler composites It is considered that the penetration enhancer acts to improve the wettability of the surface of the reinforcing filler by reacting with the nitrogen gas, and promotes spontaneous penetration of the molten matrix metal into the reinforcing filler.
  • Japanese Patent No. 2801302 discloses only an example of obtaining a matrix metal-reinforced filler composite material in which the reinforcing filler is substantially entirely dispersed, but does not disclose any example of a partial composite material. Japanese Patent No.
  • a reinforcing filler such as SiC powder and magnesium powder as a permeation enhancer are injected into a copper mold, one end of which is sealed with copper foil, and the inside is replaced with nitrogen.
  • a molten matrix metal for example, a molten aluminum alloy containing magnesium
  • a metal matrix composite is produced. It proposes how to build. During immersion in the molten aluminum alloy, the copper foil and copper foil melt, and the molten aluminum alloy spontaneously penetrates the filler.
  • the penetration enhancer improves the wettability of the surface of the reinforced filler, promotes spontaneous penetration of the molten aluminum alloy into the reinforced filler, and forms a composite. It is thought that it has realized.
  • the copper copper mold and the copper foil are dissolved in the matrix metal melt, the melt component of the matrix metal changes, which is not preferable.
  • a device to replace the inside of the copper foil and the inside of the copper foil with nitrogen is required, and a holding temperature of at least about 675 ° C is required, so that the resulting metal-reinforced filler composite is expensive. It is a factor that hinders practical application.
  • Japanese Patent No. 2905519 discloses only an example of obtaining a matrix metal-reinforced filler composite material in which the reinforcing filler is substantially entirely dispersed, but does not disclose any example of a partial composite material. Not.
  • U.S. Patent No. 3364976 discloses a mold containing a gas having at least one opening and having reactivity with molten magnesium (e.g., a gas containing oxygen and nitrogen, such as air).
  • molten magnesium e.g., a gas containing oxygen and nitrogen, such as air.
  • a method is used in which the inside of the mold is depressurized by immersing it in a molten metal and reacting the molten magnesium with oxygen and nitrogen present in the mold cavity, and filling the inside of the mold with the molten matrix metal by the vacuum suction effect.
  • US Patent No. 3364976 further discloses that the method can be applied to Al-Mg alloys.
  • the matrix metal that can penetrate the reinforcing filler is substantially limited to magnesium or an Al-Mg alloy, and specifically, using a molten Al-5% Mg alloy.
  • the reinforcing filler is filled into a mold made of steel, graphite, glass, etc., and is immersed in the molten matrix metal. In these cases, these molds remain at the interface between the matrix metal and the metal-reinforced filler composite and are not practical.
  • an object of the present invention is to produce a metal-based composite material by infiltrating a molten matrix metal between reinforcing fillers without using a nitrogen atmosphere at no pressure and at a relatively low temperature. It is to provide a low cost method.
  • Another object of the present invention is to provide a method for producing a metal-based partial composite in which only a part of the product is composited with a reinforcing filler by a pressureless infiltration method.
  • the present inventors have conducted intensive studies in view of the above-mentioned object, and as a result, have found that a reinforcing filler composed of fibers or particles and a powdery, chipped, foil-shaped, plate-shaped or lump-shaped permeation-enhancing metal are used in an aluminum container. And then put this container into the molten matrix metal, or place this container in a mold or mold and then pour the molten matrix metal into the container. By causing the metal to permeate and react with the oxygen-containing nitrogen gas in the container, thereby causing a reduced pressure in the container spontaneously, thereby absorbing the molten matrix metal into the container. As a result, it has been found that the matrix metal melt can be permeated between the reinforcing fillers at a relatively low temperature without adjusting the atmosphere or adjusting the pressure, and reached the present invention.
  • the aluminum container is put into a molten matrix metal in a crucible.
  • a luminous container is previously placed at a predetermined position in a mold or mold cavity, and the molten matrix metal is poured into the cavity.
  • an aluminum foil is used as the aluminum container, and a mixture of the reinforcing filler and the permeation enhancing metal is completely wrapped in the aluminum foil.
  • an aluminum can with a lid is used as the aluminum container, and after the mixture of the reinforcing filler and the penetration enhancing metal is filled in the aluminum can body, the aluminum can body is Close the lid.
  • the matrix filler may be stirred after the matrix filler melt has penetrated between the reinforcement fillers, so that the reinforcement filler is evenly dispersed in the matrix filler. it can.
  • the oxygen-containing nitrogen gas is preferably air.
  • the space ratio in the container [(volume of oxygen-containing nitrogen gas / internal volume of container) ⁇ 100%] is preferably 30 to 70%.
  • the permeation enhancing metal is preferably at least one metal selected from the group consisting of magnesium, calcium, zirconium and alloys containing these metals, and is particularly preferably pure magnesium or a magnesium alloy. It is preferable that the permeation enhancing metal has at least one shape selected from the group consisting of powder, chip, foil, plate, and lump.
  • the matrix metal is preferably an aluminum alloy or a magnesium-aluminum alloy. It is preferable that the temperature of the matrix metal melt be from the melting point (Tm) of the matrix metal to Tm + 40 ° C.
  • the reinforcing filler is preferably made of ceramics, and is particularly preferably SiC particles.
  • FIG. 1 is a schematic diagram showing an apparatus used for a method of manufacturing a metal matrix composite in Example 1.
  • FIG. 2 is a schematic diagram showing an apparatus used for the method for producing a metal matrix composite in Example 4.
  • FIG. 3 is a schematic diagram showing an apparatus used for a method of manufacturing a metal matrix composite in Example 5,
  • FIG. 4 is a schematic diagram showing an apparatus used for a method for producing a metal matrix composite in Example 6,
  • FIG. 5 is a schematic diagram showing an apparatus used for a method for producing a metal matrix composite in Example 7,
  • FIG. 6 is a graph showing a pressure change and a temperature change in the aluminum container in Example 1.
  • FIG. 7 is a micrograph (X200) showing the cross-sectional structure of the matrix metal-reinforced filler composite portion of the metal matrix composite prepared in Example 4. Description of the best embodiment
  • the aluminum container in which this reaction takes place is buried in the molten matrix metal, so it is not in communication with the outside air, and there is no ingress of air from the outside. Becomes When the aluminum container is dissolved in the molten matrix metal in this state, the molten matrix metal penetrates between the reinforcing fillers without substantially applying external pressure.
  • the generated Mg 3 N 2 is aluminum Good wettability with the molten metal promotes penetration of the molten matrix metal when the matrix metal is an aluminum alloy.
  • Oxygen contained in the gas in the aluminum container has higher reactivity with magnesium than nitrogen. Therefore, the degree of pressure reduction in the aluminum container is higher in an oxygen-containing nitrogen gas atmosphere than in a nitrogen gas atmosphere.
  • oxygen-containing nitrogen gas such as air
  • the permeability of the matrix metal melt is higher than when nitrogen gas is used as in Japanese Patent No. 2905519, and the production cost of the composite is reduced. It can be kept low.
  • Equation [1] indicates that ⁇ ⁇ ⁇ 0, ie, that the wettability of the matrix filler metal is improved by the surface improvement of the filler filler particles and the like, and the penetration of the matrix filler metal occurs spontaneously.
  • cos > 0.
  • ⁇ P> if we get ⁇ 0, that is, cos0> O, the absolute value of ⁇ becomes larger as the D (particle size of the reinforcing filler) is smaller, Indicates that penetration of the matrix metal melt is likely to occur.
  • the present inventors have confirmed that the larger the particle size of the reinforcing filler (the larger the gap between the reinforcing fillers), the more easily the matrix metal melt permeates. .
  • the method of the present invention does not use only the improvement of wettability. Therefore, creating a reduced pressure in the container greatly contributes to spontaneous penetration of the matrix metal melt between the reinforcing fillers. That is, in the present invention, (a) the permeation-enhancing metal in the container is reacted with oxygen and nitrogen to reduce the pressure in the container, and (b) the wettability of the reinforcing filler to the matrix metal melt is improved. Due to the synergistic effect with the improvement, the matrix metal melt is spontaneously penetrated between the reinforcing fillers.
  • the reinforcing filler can be used in various forms such as long fibers, short fibers or particles, and can be used in combination with various forms of reinforcing fillers.
  • the reinforcing filler is a particle
  • its average particle size is preferably about 1 to 1000 m, more preferably about 10 to 100 / m.
  • the fiber diameter is preferably from 0.1 to 1000 m, and more preferably from 1 to about 100 m.
  • the reinforcing filler is dispersed in the matrix metal to give the matrix metal excellent properties such as high rigidity and high wear resistance.
  • the permeation enhancing metal mixed with the reinforcing filler is preferable as the permeation enhancing metal mixed with the reinforcing filler, but calcium, zirconium, or an alloy containing these metals can also be used. It is preferable that the penetration enhancing metal has at least one shape selected from the group consisting of powder, chip, foil, plate, and lump.
  • the matrix metal melt is an aluminum alloy or a magnesium-aluminum alloy
  • Aluminum oxide film that does not dissolve at the temperature of the matrix metal melt on the surface of the aluminum container However, this oxide film is reduced when the permeation enhancing metal in the container is oxidized, and is reduced to aluminum which is easily dissolved. As a result, a hole is formed in the aluminum container in the matrix metal melt, and the molten metal enters the aluminum container.
  • the form of the aluminum container is that (a) it can be filled with the reinforcing filler and the permeation-enhancing metal, and (b) the aluminum container is substantially sealed from the outside air when buried in the matrix metal melt, and It is sufficient that the initial shape can be maintained until the pressure is reduced enough to allow the molten matrix metal to enter between the reinforcing fillers.
  • the aluminum container can be a cylindrical can with a lid, a sealable capsule, or a foil that can completely enclose a mixture of reinforced filler and penetration-enhancing metal.
  • the present invention uses an aluminum container that dissolves in a molten matrix metal, unlike the case where a steel mold, a graphite mold, a glass mold, or the like is used as in U.S. Pat. No container material remains at the interface.
  • Aluminum alloy is preferable as a matrix metal to which the pressureless infiltration method of the present invention can be applied, but a magnesium-aluminum alloy can also be used.
  • the aluminum content is preferably at least 1% by weight, more preferably at least 3% by weight, in order to minimize the variation of the matrix alloy composition due to melting of the aluminum container.
  • an aluminum container is used as a container for containing the mixture of the reinforcing filler and the permeation-enhancing metal, and the atmosphere in the container is made of oxygen-containing nitrogen gas. Since not only the reaction but also the oxidation reaction (exothermic reaction) is used, holes are opened in the aluminum container even with a relatively low-temperature matrix metal melt. Therefore, the temperature of the matrix metal melt may be about the same as the filling temperature. In concrete terms, the preferred temperature of the matrix metal molten to the melting point (Tm) ⁇ T m + 40 ° about C of the matrix metal. Since a relatively low-temperature matrix metal melt can be used, a metal-based composite material can be obtained at low cost. (5) Atmosphere in aluminum container
  • the atmosphere in the aluminum container must contain oxygen gas and nitrogen gas in order to cause the reaction between the permeation enhancing metal in the container and oxygen and nitrogen depending on the temperature of the matrix metal melt.
  • oxygen gas must be present in an amount sufficient to oxidize the permeation enhancing metal in the aluminum container.
  • Nitrogen gas reacts with permeation-enhancing metal such as magnesium in an aluminum container to form a matrix metal melt and a nitride with good wettability. Since the nitride adheres to the surface of the reinforcing filler, the matrix metal melt easily penetrates between the reinforcing fillers.
  • the atmosphere in the aluminum container is preferably an oxygen-containing nitrogen gas having an oxygen partial pressure of about 10 to 40% and a nitrogen partial pressure of about 90 to 60%.
  • air is preferable to use as the oxygen-containing nitrogen gas.
  • the use of air eliminates the need for equipment for adjusting the atmosphere, such as nitrogen replacement, as described in Japanese Patent No. 2905519. If this condition is not satisfied, for example, if the interior of the container is substantially made of only nitrogen gas, the oxidation reaction of the permeation-enhancing metal (exothermic reaction at high temperature) and the reduction reaction of the aluminum oxide film due to this will not occur, so that aluminum Dissolution of the container is unlikely.
  • a first pressureless infiltration device for carrying out the method of the invention is schematically shown in FIG.
  • the equipment consists of a graphite crucible 1 for containing the matrix metal melt, and an aluminum container 4 containing a mixture of the reinforcing filler 2 and the permeation-enhancing metal 3, a stainless steel for immersing it in the matrix metal melt 5.
  • a pressure member for measuring the pressure change inside the aluminum container 4 by communicating with the holding member 6 made of It has a pipe 7, a pressure sensor 8 provided at the other end of the pipe 7, and a thermocouple 9 provided substantially at the center of the aluminum container 4.
  • the aluminum container 4 may be in any form as long as the inside is substantially shut off from the outside air, and specific examples include the shape of a foil, a container with a lid, or a capsule.
  • a commercially available aluminum foil is immersed in the matrix metal melt 5, it is shut off from the outside air, and thus corresponds to the aluminum container 4 of the present invention.
  • a capsule is preferred because there is no possibility that the inside of the capsule will communicate with the outside air during immersion.
  • the thickness of the aluminum container is not particularly limited as long as it does not dissolve too quickly due to contact with the matrix metal melt, but practically, it is preferably about l to 2000 zm, and 10 to 1000; ⁇ M is more preferable.
  • thermocouple 9 In order to measure the internal temperature of the aluminum container 4, one end of the thermocouple 9 is disposed almost at the center of the aluminum container 4, and the other end of the thermocouple 9 is connected to a thermometer (not shown). Tie.
  • a molten aluminum 5 is poured into a graphite crucible 1 heated to a predetermined temperature, and an aluminum container 4 is gently charged therein. Since there is a lot of air in the voids in the aluminum container 4, if the air is simply put into the aluminum melt 5, it will float on the surface of the melt. Then, when the decompression occurs, the aluminum foil is broken and the outside air enters the aluminum container 4, which not only hinders the decompression but also burns pure magnesium of the permeation enhancement metal 3. Therefore, the aluminum container 4 Pressing down with stainless steel holding member 6 prevents floating.
  • the entire crucible 1 is heated and maintained at about 620 to 700 ° C for 0.5 to 5 hours in an electric furnace (not shown). During the immersion, the pressure change and the temperature change in the aluminum container 4 are measured, and the occurrence of reduced pressure is confirmed.
  • the composite of the aluminum container 4 is completed, the composite is cooled in the graphite crucible 1 to obtain a partially reinforced aluminum-based composite material in which only the aluminum container 4 is composited.
  • aluminum foil was used, but instead a mixture of reinforced filler and permeation-enhancing metal was placed in an aluminum can and the can was pre-placed on the bottom of graphite crucible 1 before pouring molten aluminum 5 You may.
  • the reinforcing filler 2 may be uniformly dispersed throughout the molten aluminum 5 by stirring the molten aluminum 5. Next, the molten aluminum having the reinforcing filler 2 dispersed therein is poured into an ingot case and solidified to obtain a reinforced aluminum-based composite material in which the reinforcing filler 2 is uniformly dispersed.
  • FIG. 2 schematically shows a second pressureless infiltration device.
  • the apparatus has a mold 21 for containing a matrix metal melt, and an aluminum container 24 containing a mixture of a reinforcing filler 22 and a penetration enhancing metal 23.
  • the aluminum container 24 for example, a cylindrical aluminum can can be used to enhance the pressure reduction effect.
  • the lid is closed to obtain an aluminum container 24 that is shielded from the outside air.
  • the aluminum container 24 is placed at a predetermined position in the mold 21 preheated to a predetermined temperature so that the lid is not opened.
  • a molten aluminum 25 is poured into a mold 21 in which an aluminum container 24 is arranged, and is maintained at a predetermined temperature in an electric furnace (not shown). Next, the mold 21 is taken out from the electric furnace, and the mold 21 is cooled to obtain the aluminum composite reinforcing material partial composite.
  • an aluminum can with a lid was used.
  • the aluminum can 24 can be hermetically sealed by disposing the aluminum can and bringing the opening of the aluminum can into contact with the inner wall of the mold 21 at that time.
  • the permeation-enhancing metal 23 may be in the form of a flat plate (FIG. 3), a chip (FIG. 4), or a lump (FIG. 5), in addition to a strip as shown in FIG.
  • a flat plate FIG. 3
  • a chip FIG. 4
  • a lump FIG. 5
  • the mold having a Kiyabiti in this example, green sand mold, shell mold, C0 2 type, etc. of gas curing ⁇ it is also possible to use a self-hardening ⁇ like.
  • Fig. 6 shows the results. From Fig. 6, the aluminum foil container 4 However, it was confirmed that when buried in the molten aluminum, it was shut off from the outside air, and decompression occurred inside.
  • the molten aluminum 5 was composited at the site where the aluminum container 4 was immersed, but the aluminum molten metal 5 was heated to 700 ° C in an electric furnace to uniformly diffuse the SiC particles 2 into the molten aluminum 5.
  • the mixture was warmed, sufficiently stirred with a stirring rod (not shown), and after removing the slag, poured into an ingot case (not shown). Thereafter, the molten aluminum 5 was cooled in the ingot case, and the solidified aluminum alloy was removed. In this way, an SiC particle reinforced aluminum matrix composite in which the entire matrix metal was composited was obtained.
  • the aluminum foil container 4 was immersed in the aluminum melt 5 poured into the graphite crucible 1. Also, the method of pouring the molten aluminum 5 into the aluminum alloy obtained a SiC particle reinforced aluminum matrix composite.
  • Example 2
  • Example 3 An aluminum-based composite material uniformly reinforced with SiC particles was obtained in the same manner as in Example 1.
  • Example 3 An aluminum-based composite material uniformly reinforced with SiC particles was obtained in the same manner as in Example 1.
  • an aluminum foil container 4 was poured into a graphite crucible 1.
  • the molten aluminum 5 was immersed in the molten metal 5, but after the aluminum foil container 4 was previously placed on the bottom of the graphite crucible 1, the aluminum molten metal 5 was poured into the graphite crucible 1.
  • a commercially available aluminum can with lid (thickness: 0.5 mm, inner diameter: 17 mm, height: 40 mm) instead of aluminum foil, a partially SiC particle reinforced aluminum matrix composite can be obtained.
  • a partially SiC particle reinforced aluminum matrix composite can be obtained.
  • FIG. 7 shows a micrograph (X200) of a cross-sectional structure of a portion where the aluminum container 24 containing SiC particles is arranged. From Fig. 7, it was observed that the aluminum alloy (Al-6% Si alloy) matrix (white part) permeated well between the SiC particles (black part). On the other hand, only the aluminum alloy matrix was observed in the cross-sectional structure of the portion where the SiC particle-containing aluminum container 24 was not disposed. As a result of the above observations, an aluminum-based partial composite in which only the portion where the SiC particle-containing aluminum container 24 was arranged was composited was obtained by the method of the present embodiment.
  • Example 5 Example 5
  • a 0.3 mm thick plate of pure magnesium (manufactured by Osaka Fuji Industrial Co., Ltd., purity: 99%) 33 was placed along the inner wall surface of the same commercially available cylindrical aluminum can 24 as in Example 3. Placed. Next, 20 g of SiC particles (GC: # 240, average particle size: 58 m) dried by heating at 160 ° C for 2 hours were filled inside the pure magnesium plate 33. After closing the aluminum container 24, it was placed in the cavity of the mold 21 preheated to about 500 ° C.
  • molten aluminum alloy (AC4CH alloy) was poured into the mold 21 cavity. Pouring temperature was 650 ° C. The aluminum container 24 buried in the molten aluminum alloy 25 was substantially shielded from the outside air, and the inside was sealed. After pouring the molten aluminum 25, it was kept in an electric furnace (not shown) at 650 ° C for 1.5 hours. Thereafter, the entire mold 21 was taken out of the electric furnace and cooled to obtain an aluminum-based partial composite material in which only the portion where the aluminum container 24 containing SiC particles was disposed was strengthened.
  • AC4CH alloy molten aluminum alloy
  • the same commercially available cylindrical aluminum can 24 as in Example 3 was placed at the bottom of pure magnesium in the form of lOg chips (manufactured by Chuo Industrial Co., Ltd., purity: 99.8%, trade name: CM30) 43 Was charged.
  • 20 g of SiC particles (GC: # 240, average particle size: 58 m) dried by heating at 160 ° C for 2 hours were filled on the chipped pure magnesium 43.
  • the container 24 was capped without mixing the chipped pure magnesium 43 and the SiC particles 22.
  • This aluminum container was placed in a mold 21 preheated to about 500 ° C.
  • Example 7 In the same procedure as in Example 5, a molten metal 25 of an aluminum alloy (AC4CH) was poured into a mold 21 and kept in an electric furnace (not shown) at 650 ° C. for 1.5 hours. The aluminum container 24 buried in the aluminum alloy melt 25 was substantially shielded from the outside air, and the inside was sealed. After cooling the aluminum alloy melt 25, an aluminum-based partial composite material was obtained in which only the portion where the SiC particle-containing aluminum container 24 was disposed was reinforced.
  • AC4CH aluminum alloy
  • the bottom of the same commercially available cylindrical aluminum can 24 as in Example 3 was filled with l.Og of commercially available massive pure magnesium 53.
  • 20 g of SiC particles (GC: # 240, average particle size: 58 / m) dried by heating at 160 ° C for 2 hours were filled thereon.
  • the container 24 was covered, it was placed in the cavity of the mold 21 preheated to about 500 ° C.
  • Example 5 a molten metal of aluminum alloy (AC4CH) was poured into the mold 21 and kept in an electric furnace (not shown) at 650 ° C. for 1.5 hours.
  • the aluminum container 24 buried in the aluminum alloy melt 25 was substantially shielded from the outside air, and the inside was sealed.
  • an aluminum-based partial composite material was obtained in which only the portion where the aluminum container 24 containing SiC particles was disposed was strengthened. Comparative Example 1
  • the mixed powder was filled in the same commercially available cylindrical aluminum can 24 as in Example 3. Without covering the cylindrical aluminum can 24, it was put into a pressure reducing device (not shown), and the pressure inside the pressure reducing device was reduced to about 10 kPa. After that, a cycle of introducing 99% nitrogen gas until the inside of the decompression device reaches the atmospheric pressure is repeated four times, the inside of the cylindrical aluminum can 24 is replaced with nitrogen, and the aluminum container 24 is covered with a lid. It was a container. The aluminum container 24 was placed in the cavity of the mold 21 preheated to about 50 CTC.
  • the method of the present invention it is possible to infiltrate the matrix metal melt between the reinforcing fillers at no pressure and at a relatively low temperature without adjusting the atmosphere. This eliminates the need for special equipment conventionally required to manufacture metal-based composites, and can significantly reduce manufacturing costs. In addition, a metal-based partial composite is obtained in which only part of the product is a composite with the reinforcing filler.

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Abstract

Un procédé de production d'un matériau composite à base de métal comprend un métal matriciel qui contient au moins dans une partie de ce dernier une charge de renforcement, le procédé se caractérisant par le fait que (1) on charge dans un contenant en aluminium au moins une charge de renforcement sous forme de fibres ou de particules et au moins un métal améliorant la pénétration ; (2) on plonge le contenant en aluminium alors qu'il se trouve dans un état où il reste du gaz contenant de l'oxygène, dans un mélange fondu de métal matriciel comprenant un alliage d'aluminium ou un alliage de magnésium-aluminium, (3) on dissout le contenant en aluminium dans la fonte de métal matriciel, pour que la matière fondue du métal matriciel pénètre dans la charge de renforcement, et (4) on solidifie la fonte de métal matriciel.
PCT/JP2000/007745 1999-12-21 2000-11-02 Procede de production d'un materiau composite a base de metal WO2001046486A1 (fr)

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JP2007204808A (ja) * 2006-02-01 2007-08-16 Taiheiyo Cement Corp 金属マトリックス複合体の形成方法
JP2007297689A (ja) * 2006-05-02 2007-11-15 Keiji Yamabe 鋳造用の金属−セラミックス複合材料の製造法
KR101507945B1 (ko) * 2012-12-26 2015-04-08 주식회사 포스코 용탕 용기 내 반응에 의한 합금 제조방법 및 합금 제조 장치
CN114540725A (zh) * 2022-01-07 2022-05-27 北京电子工程总体研究所 一种燃气舵及其工艺成型方法、火箭

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CN100408714C (zh) * 2003-03-04 2008-08-06 吉林大学 混杂增强镁基自润滑复合材料及其制备方法
FI20086088A (fi) * 2008-11-18 2010-05-19 Metso Minerals Inc Menetelmä komposiittimateriaalin valmistamiseksi, sekä menetelmällä valmistetun komposiittimateriaalin käyttö
KR101499855B1 (ko) * 2013-06-26 2015-03-18 주식회사 티앤머티리얼스 가압함침형 금속기지 복합재료 제조방법
ITTO20130531A1 (it) 2013-06-27 2013-09-26 Torino Politecnico Metodo per la fabbricazione di compositi a matrice di alluminio tramite infiltrazione senza pressione
CN105063446B (zh) * 2015-08-12 2017-09-19 中国兵器工业第五九研究所 一种颗粒增强镁基复合材料制备方法
JP6984926B1 (ja) * 2021-04-19 2021-12-22 アドバンスコンポジット株式会社 金属基複合材料の製造方法及びプリフォームの作製方法

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Publication number Priority date Publication date Assignee Title
JP2007204808A (ja) * 2006-02-01 2007-08-16 Taiheiyo Cement Corp 金属マトリックス複合体の形成方法
JP2007297689A (ja) * 2006-05-02 2007-11-15 Keiji Yamabe 鋳造用の金属−セラミックス複合材料の製造法
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KR101507945B1 (ko) * 2012-12-26 2015-04-08 주식회사 포스코 용탕 용기 내 반응에 의한 합금 제조방법 및 합금 제조 장치
CN114540725A (zh) * 2022-01-07 2022-05-27 北京电子工程总体研究所 一种燃气舵及其工艺成型方法、火箭
CN114540725B (zh) * 2022-01-07 2022-09-23 北京电子工程总体研究所 一种燃气舵及其工艺成型方法、火箭

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