US20190100824A1 - Aluminum alloy powder and production method thereof, and aluminum alloy extruded material and production method thereof - Google Patents

Aluminum alloy powder and production method thereof, and aluminum alloy extruded material and production method thereof Download PDF

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US20190100824A1
US20190100824A1 US16/149,421 US201816149421A US2019100824A1 US 20190100824 A1 US20190100824 A1 US 20190100824A1 US 201816149421 A US201816149421 A US 201816149421A US 2019100824 A1 US2019100824 A1 US 2019100824A1
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mass
aluminum alloy
extruded material
intermetallic compound
alloy powder
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Takuya ARAYAMA
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Resonac Holdings Corp
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Showa Denko KK
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    • 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
    • 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
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • 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
    • 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
    • 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
    • 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
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • B22F2003/208—Warm or hot extruding
    • 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
    • B22F2301/00—Metallic composition of the powder or its coating
    • B22F2301/05—Light metals
    • B22F2301/052—Aluminium
    • 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
    • B22F2304/00—Physical aspects of the powder
    • B22F2304/10—Micron size particles, i.e. above 1 micrometer up to 500 micrometer
    • 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
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • the present invention relates to an aluminum alloy powder excellent in mechanical properties at high temperature and a production method thereof, and an aluminum alloy extruded material (extruded product) excellent in mechanical properties at high temperature and a production method thereof.
  • a compressor impeller such as, e.g., a compressor wheel of a turbocharger for use in an automobile internal combustion engine is rotated at high speed exceeding 10,000 rpm under high temperature conditions of about 150° C. For this reason, it is required to have high strength and high rigidity under such high temperature. Further, the compressor impeller is required to attain the weight reduction in order to reduce the energy loss, and also required to have strength capable of withstanding a high speed rotation.
  • a compressor impeller is produced by subjecting a cast/forged product of a 2618 alloy (an alloy consisting of Cu: 1.9 mass % to 2.7 mass %, Mg: 1.3 mass % to 1.8 mass %, Ni: 0.9 mass % to 1.2 mass %, Fe: 0.9 mass % to 1.3 mass %, Si: 0.1 mass % to 0.25 mass %, Ti: 0.04 mass % to 0.1 mass %, the balance being Al and inevitable impurities) to a cutting process.
  • a 2618 alloy an alloy consisting of Cu: 1.9 mass % to 2.7 mass %, Mg: 1.3 mass % to 1.8 mass %, Ni: 0.9 mass % to 1.2 mass %, Fe: 0.9 mass % to 1.3 mass %, Si: 0.1 mass % to 0.25 mass %, Ti: 0.04 mass % to 0.1 mass %, the balance being Al and inevitable impurities
  • Patent Document 1 discloses a technique of providing an Al—Cu—Mg based aluminum alloy extruded material improved in strength at high temperature (160° C.) as compared with a conventional one. That is, Patent Document 1 describes a heat resistant aluminum alloy extruded material excellent in high temperature strength and high temperature fatigue properties, wherein the aluminum alloy consists of Cu: 3.4 to 5.5% (“%” denotes “mass %”, hereinafter the same), Mg: 1.7 to 2.3%, Ni: 1.0 to 2.5%, Fe: 0.5 to 1.5%, Mn: 0.1 to 0.4%, Zr: 0.05 to 0.3%, Si: less than 0.1%, Ti: less than 0.1%, and the balance being Al and inevitable impurities.
  • Patent Document 1 Japanese Patent No. 5284935
  • the present invention has been made in view of the aforementioned technical background, and aims to provide an aluminum alloy powder excellent in mechanical properties at high temperature and a production method thereof, and an aluminum alloy extruded material excellent in mechanical properties at high temperature and a production method thereof.
  • the present invention provides the following means.
  • An aluminum alloy powder consisting of Fe: 5.0 mass % to 9.0 mass %, V: 0.1 mass % to 3.0 mass %, Mo: 0.1 mass % to 3.0 mass %, Zr: 0.1 mass % to 2.0 mass %, Ti: 0.02 mass % to 2.0 mass %, and the balance being Al and inevitable impurities,
  • a production method of an aluminum alloy powder comprising:
  • An aluminum alloy extruded material consisting of Fe: 5.0 mass % to 9.0 mass %, V: 0.1 mass % to 3.0 mass %, Mo: 0.1 mass % to 3.0 mass %, Zr: 0.1 mass % to 2.0 mass %, Ti: 0.02 mass % to 2.0 mass %, and the balance being Al and inevitable impurities,
  • a production method of an aluminum alloy extruded material comprising:
  • an aluminum alloy powder excellent in mechanical properties at high temperature is provided. Therefore, by using this aluminum alloy powder, it is possible to produce an aluminum alloy extruded material (extruded product) excellent in mechanical properties (static strength, creep properties, etc.) at high temperature.
  • the molten metal of the aluminum alloy is quench-solidified by an atomizing method into powder. Therefore, diffusion of each element of the alloy during the solidification can be suppressed, and coarsening of crystal grains and precipitates can be suppressed. Furthermore, appearance of equilibrium phases and metastable phases can be suppressed. This increases the solid solution amount of Fe which is a transition element. Therefore, it is possible to produce an aluminum alloy powder excellent in mechanical properties (static strength, creep properties, etc.) at high temperature. For this reason, by using this aluminum alloy powder, it is possible to produce an aluminum alloy extruded material (extruded product) excellent in mechanical properties at high temperature.
  • an aluminum alloy extruded material (extruded product) excellent in mechanical properties (static strength, creep properties, etc.) at high temperature is provided.
  • This aluminum alloy extruded material is suitably used as an internal combustion engine member, such as, e.g., a turbo compressor impeller of a turbocharger for automobiles.
  • this aluminum alloy extruded material is suitably used, for example, as an internal combustion engine member (internal combustion engine parts) configured to be rotated at high speed at high temperature.
  • an aluminum alloy extruded material (extruded product) excellent in mechanical properties (static strength, creep properties, etc.) at high temperature is provided.
  • the obtained aluminum alloy extruded material is suitably used as an internal combustion engine member, such as, e.g., a turbo compressor impeller of a turbocharger for automobiles.
  • the obtained aluminum alloy extruded material is suitably used, for example, as an internal combustion engine member (internal combustion engine parts) configured to be rotated at high speed at high temperature.
  • FIG. 1 is a perspective view showing an example of an aluminum alloy extruded material (extruded product) of the present invention.
  • An aluminum alloy powder according to the present invention is an aluminum alloy powder consisting of Fe: 5.0 mass % to 9.0 mass %, V: 0.1 mass % to 3.0 mass %, Mo: 0.1 mass % to 3.0 mass %, Zr: 0.1 mass % to 2.0 mass %, Ti: 0.02 mass % to 2.0 mass %, and the balance being Al and inevitable impurities, wherein the aluminum alloy powder contains an Al—Fe based intermetallic compound, and wherein an average circle equivalent diameter of the Al—Fe based intermetallic compound is in a range of 0.1 ⁇ m to 3.0 ⁇ m in a cross-sectional structure of the aluminum alloy powder.
  • an aluminum alloy powder excellent in mechanical properties at high temperature is provided. Therefore, by using the aluminum alloy powder of the present invention, it is possible to produce an aluminum alloy extruded material (extruded product) excellent in mechanical properties (static strength, creep properties, etc.) at high temperature.
  • the average particle diameter of the aluminum alloy powder is not particularly limited, but it is preferable in the range of 30 ⁇ m to 70 ⁇ m. When it is 30 ⁇ m or more, the yield of the alloy powder production can be markedly improved, and when it is 70 ⁇ m or less, contamination of coarse oxides and/or foreign substances can be avoided.
  • a molten metal of an aluminum alloy consisting of Fe: 5.0 mass % to 9.0 mass %, V: 0.1 mass % to 3.0 mass %, Mo: 0.1 mass % to 3.0 mass %, Zr: 0.1 mass % to 2.0 mass %, Ti: 0.02 mass % to 2.0 mass %, and the balance being Al and inevitable impurities is quench-solidified by an atomizing method into powder to thereby obtain an aluminum alloy powder (Powdering Step).
  • a production method it is possible to provide an aluminum alloy powder having the above-mentioned configuration.
  • an aluminum alloy powder of the aforementioned specific composition in which an Al—Fe based intermetallic compound is contained in the aluminum alloy powder and an average circle equivalent diameter of the Al—Fe based intermetallic compound is in a range of 0.1 ⁇ m to 3.0 ⁇ m in a cross-sectional structure of the aluminum alloy powder can be produced.
  • the aluminum alloy molten metal having the aforementioned specific composition is prepared by an ordinary dissolution method.
  • the obtained aluminum alloy molten metal is powdered by an atomizing method.
  • the atomizing method is a method in which fine droplets of the molten aluminum alloy are misted by a flow of a gas, such as, e.g., a nitrogen gas, from a spray nozzle and sprayed to quench-solidify fine droplets to obtain a fine aluminum alloy powder material.
  • the cooling rate is preferably set from 10 2 to 10 5 ° C./second. It is preferable so that an aluminum alloy powder having an average particle diameter of 30 ⁇ m to 70 ⁇ m can be obtained. It is preferable to classify the obtained aluminum alloy powder using a sieve.
  • the aluminum alloy powder (the invention recited in the aforementioned Item [1]) according to the present invention is not limited to the aluminum alloy powder obtained by the aforementioned production method, but also includes those obtained by other production methods.
  • the aluminum alloy powder obtained in the aforementioned powdering step is compression-molded to obtain a green compact (Compression Molding Step).
  • a green compact Compression Molding Step
  • an aluminum alloy powder heated to 250° C. to 300° C. is filled in a metal mold heated to 230° C. to 270° C. and compressed into a predetermined shape to obtain a green compact.
  • the pressure of the compression molding is not particularly limited, it is usually preferably set to 0.5 ton/cm 2 to 3.0 ton/cm 2 .
  • the shape of the green compact is not particularly limited, it is preferably formed into a cylindrical shape or a disc shape, considering a subsequent extrusion step.
  • the green compact obtained in the aforementioned compression molding step is hot-extruded to obtain an extruded material (Extrusion Step).
  • the green compact is subjected to mechanical processing, such as, e.g., surfacing, as necessary, and then subjected to a degassing treatment, heating, and an extrusion step.
  • the heating temperature of the green compact before extrusion is preferably set to 300° C. to 450° C.
  • the green compact is inserted into an extruding container, pressurized by an extrusion ram, and extruded from an extrusion die into, for example, a round bar shape. At this time, it is preferable that the extrusion container be previously heated to 300° C. to 400° C.
  • the extrusion pressure is preferably set to 10 MPa to 25 MPa.
  • the extruded material 1 obtained in the extrusion step is configured such that an Al—Fe based intermetallic compound is contained in the extruded material and in the cross-sectional structure of the extruded material, the average circle equivalent diameter of the Al—Fe based intermetallic compound is within the range of 0.1 ⁇ m to 5.0 ⁇ m.
  • the aluminum alloy extruded material of the present invention can be obtained.
  • the aluminum alloy extruded material (the aluminum alloy extruded material according to the present invention) obtained by the production method of the aluminum alloy extruded material according to the above-described present invention is an aluminum alloy extruded material consisting of Fe: 5.0 mass % to 9.0 mass %, V: 0.1 mass % to 3.0 mass %, Mo: 0.1 mass % to 3.0 mass %, Zr: 0.1 mass % to 2.0 mass %, Ti: 0.02 mass % to 2.0 mass %, and the balance being Al and inevitable impurities, wherein the aluminum alloy extruded material contains an Al—Fe based intermetallic compound, and wherein an average circle equivalent diameter of the Al—Fe based intermetallic compound is in a range of 0.1 ⁇ m to 3.0 ⁇ m in a cross-sectional structure of the aluminum alloy extruded material.
  • the aluminum alloy extruded material according to the present invention is not limited to the aluminum alloy extruded material obtained by the aforementioned production method, but also includes those obtained by other production methods.
  • the aforementioned aluminum alloy is an aluminum alloy consisting of Fe: 5.0 mass % to 9.0 mass %, V: 0.1 mass % to 3.0 mass %, Mo: 0.1 mass % to 3.0 mass %, Zr: 0.1 mass % to 2.0 mass %, Ti: 0.02 mass % to 2.0 mass %, and the balance being Al and inevitable impurities.
  • the Fe (component) is an element that generates an Al—Fe based intermetallic compound having a high melting point and can improve mechanical properties (static strength, creep properties, etc.) in a high temperature range of 200° C. to 350° C.
  • the Fe content rate in the aluminum alloy is set so as to fall within the range of 5.0 mass % to 9.0 mass %. When the Fe content rate is less than 5.0 mass %, the strength of the product, such as, e.g., aluminum alloy extruded material, is decreased. When the Fe content rate exceeds 9.0 mass %, the ductility of the product, such as, e.g., aluminum alloy extruded material, decreases.
  • the Fe content rate in the aluminum alloy is preferably within the range of 7.0 mass % to 8.0 mass %.
  • the V (component) is an element that generates Al—Fe—V—Mo based intermetallic compound and can improve mechanical properties (static strength, creep properties, etc.) in a high temperature range of, for example, 200° C. to 350° C.
  • the V content rate in the aluminum alloy is set so as to fall within the range of 0.1 mass % to 3.0 mass %.
  • the strength of the product such as, e.g., an aluminum alloy extruded material
  • the V content rate exceeds 3.0 mass %
  • the ductility of the product such as, e.g., an aluminum alloy extruded material, decreases.
  • the V content rate in the aluminum alloy is preferably within the range of 1.0 mass % to 2.0 mass %.
  • the Mo (component) is an element that generates an Al—Fe—V—Mo based intermetallic compound and can improve mechanical properties (static strength, creep properties, etc.) in a high temperature range of, for example, 200° C. to 350° C.
  • the Mo content rate in the aluminum alloy is set so as to fall within the range of 0.1 mass % to 3.0 mass %. When the Mo content rate is less than 0.1 mass %, the strength of the product, such as, e.g., an aluminum alloy extruded material, is decreased. When the Mo content rate exceeds 3.0 mass %, the ductility of the product, such as, e.g., an aluminum alloy extruded material, decreases.
  • the Mo content rate in the aluminum alloy is preferably within the range of 1.0 mass % to 2.0 mass %.
  • Zr is an element which does not cause coarsening of an Al—Fe—V—Mo based intermetallic compound and can realize microcrystallization of intermetallic compounds. Further, when Zr is contained, it is possible to improve high temperature strength, and it is also possible to suppress self-diffusion of Al in the Al matrix, thereby improving creep properties.
  • the Zr content rate in the aluminum alloy is set so as to fall within the range of 0.1 mass % to 2.0 mass %. When the Zr content rate is less than 0.1 mass %, there arises a problem that the effects of precipitation-strengthening and dispersion-strengthening cannot be exhibited.
  • the Zr content rate in the aluminum alloy is preferable within the range of 0.5 mass % to 1.5 mass %.
  • the Ti has a role of forming an Al—(Ti, Zr) based intermetallic compound having an L 12 structure with Al in cooperation with Zr.
  • the Ti content rate in the aluminum alloy is set so as to fall within the range of 0.02 mass % to 2.0 mass %. When the Ti content rate is less than 0.02 mass %, there arises a problem that the effects of precipitation-strengthening and dispersion-strengthening cannot be exhibited. When the Ti content rate exceeds 2.0 mass %, the ductility decreases.
  • the Ti content rate in the aluminum alloy is preferable within the range of 0.5 mass % to 1.0 mass %.
  • the aluminum alloy may have a configuration (composition) containing 0.0001 mass % to 0.03 mass % of B (boron).
  • composition containing 0.0001 mass % to 0.03 mass % of B (boron).
  • an Al—Fe based intermetallic compound is contained in the aluminum alloy powder or the aluminum alloy extruded material, and an average circle equivalent diameter of the Al—Fe based intermetallic compound is in the range of 0.1 ⁇ m to 3.0 ⁇ m in a cross-sectional structure of the aluminum alloy powder or the aluminum alloy extruded material.
  • the average circle equivalent diameter of the intermetallic compound is less than 0.1 ⁇ m, the effect of dispersion-strengthening cannot be exhibited. Further, when the average circle equivalent diameter of the intermetallic compound exceeds 3.0 ⁇ m, a coarse intermetallic compound is formed, which causes a problem that the mechanical properties are deteriorated since fractures occur with the coarse intermetallic compound as a starting point.
  • the average circle equivalent diameter of the Al—Fe intermetallic compound is preferably within the range of 0.3 ⁇ m to 2.0 ⁇ m, particularly preferably within the range of 0.4 ⁇ m to 1.5 ⁇ m.
  • the Al—Fe based intermetallic compound is not particularly limited, but examples thereof include, e.g., an Al—Fe—V—Mo based intermetallic compound containing at least Al, Fe, V, and Mo.
  • Al—Fe—V—Mo based intermetallic compound it is preferably configured that the content rate of Al is 81.60 mass % to 92.37 mass %, the content rate of Fe is 2.58 mass % to 10.05 mass %, the content rate of V is 1.44 mass % to 4.39 mass %, the content rate of Mo is 2.45 mass % to 3.62 mass %. In this case, good mechanical properties can be obtained in a high temperature range of 200° C. or above.
  • the circle equivalent diameter of the Al—Fe based intermetallic compound denotes a value converted to a diameter of a circle having the same area as the area of the Al—Fe based intermetallic compound in the SEM photograph (image) of the cross-section of the aluminum alloy powder or the aluminum alloy extruded material.
  • An aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Ti: 0.1 mass %, Al: 86.9 mass %, and inevitable impurities was heated to obtain an aluminum alloy molten metal of 1,000° C. Then, the aluminum alloy molten metal was atomized with a gas to quench-solidify it into powder. Thus, an aluminum alloy powder (aluminum alloy atomized powder) having an average particle diameter of 50 ⁇ m was obtained.
  • the obtained aluminum alloy powder was preheated to a temperature of 280° C.
  • the preheated aluminum alloy powder was filled in a mold heated at the same temperature of 280° C., and compression-molded with a pressure of 1. 5 ton/cm 2 .
  • a columnar green compact (molded product) having a diameter of 210 mm and a length of 250 mm was obtained.
  • the obtained green compact was subjected to facing by a lathe to a diameter of 203 mm to obtain a green compact billet.
  • the obtained billet was heated to 400° C., and this heated billet was inserted into an extrusion container maintained at 400° C. and having an inner diameter of 210 mm, and extruded at an extrusion ratio of 6.4 by an indirect extrusion method with a die having an inner diameter of 83 mm.
  • an extruded material 1 was obtained (see FIG. 1 ).
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Ti: 0.5 mass %, Al: 86.5 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Ti: 1.0 mass %, Al: 86.0 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Ti: 2.0 mass %, Al: 85.0 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Mo: 2.0 mass %, Zr: 0.5 mass %, Ti: 1.0 mass %, Al: 86.5 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Mo: 2.0 mass %, Zr: 1.5 mass %, Ti: 1.0 mass %, Al: 85.5 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Mo: 0.5 mass %, Zr: 1.0 mass %, Ti: 1.0 mass %, Al: 87.5 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Mo: 1.5 mass %, Zr: 1.0 mass %, Ti: 1.0 mass %, Al: 86.5 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 0.5 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Ti: 1.0 mass %, Al: 87.5 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 1.5 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Ti: 1.0 mass %, Al: 86.5 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 6.0 mass %, V: 2.0 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Ti: 1.0 mass %, Al: 88.0 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 7.0 mass %, V: 2.0 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Ti: 1.0 mass %, Al: 87.0 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Al: 87.0 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Zr: 1.0 mass %, Si: 2.0 mass %, Cu: 0.13 mass %, Mg: 0.13 mass %, Al: 86.74 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Si: 2.0 mass %, Al: 85.0 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Mg: 1.0 mass %, Al: 86.0 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Mo: 2.0 mass %, Ti: 1.0 mass %, Al: 87.0 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Zr: 1.0 mass %, Ti: 1.0 mass %, Al: 88.0 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Ti: 1.0 mass %, Al: 88.0 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing V: 2.0 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Ti: 1.0 mass %, Al: 94.0 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Mo: 2.0 mass %, Zr: 2.5 mass %, Ti: 1.0 mass %, Al: 84.5 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 8.0 mass %, V: 2.0 mass %, Mo: 4.0 mass %, Zr: 1.0 mass %, Ti: 1.0 mass %, Al: 84.0 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 6.0 mass %, V: 4.0 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Ti: 1.0 mass %, Al: 86.0 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • An extruded material 1 was obtained in the same manner as in Example 1 except that an aluminum alloy containing Fe: 10.0 mass %, V: 2.0 mass %, Mo: 2.0 mass %, Zr: 1.0 mass %, Ti: 1.0 mass %, Al: 84.0 mass %, and inevitable impurities was used as an aluminum alloy for forming an aluminum alloy molten metal.
  • the “average circle equivalent diameter ( ⁇ m) of the intermetallic compound” in Tables 1 to 3 means that the average circle equivalent diameter of an Al—Fe—V—Mo based intermetallic compound (intermetallic compound containing at least Al, Fe, V, and Mo) existing in the matrix of each aluminum alloy extruded material.
  • This “average circle equivalent diameter ( ⁇ m) of the intermetallic compound” was obtained as follows. From the central portion (intermediate bisecting position) of the obtained aluminum alloy extruded material (columnar article) in the L direction (longitudinal direction, i.e., axial direction), samples for tissue observation each having a size of 10 mm in length ⁇ 10 mm in width ⁇ 10 mm in thickness were cut into pieces.
  • This sample piece was micro-polished using a cross section sample preparation apparatus (cross section polisher). Then, an SEM photograph (scanning electron microscope photograph) of this sample piece after the micro polishing was taken. From this photographic image, the average circle equivalent diameter ( ⁇ m) of the intermetallic compound was determined (evaluated). An average circle equivalent diameter was calculated for 10 Al—Fe—V—Mo based intermetallic compounds existing in the field of view 1.5815 mm 2 in the SEM photograph.
  • the obtained aluminum alloy extruded material (columnar article) was processed into a tensile test piece having a gauge distance of 20 mm and a parallel portion diameter of 4 mm. Then, the high temperature tensile strength (tensile strength at 260° C.) was measured by performing a high temperature tensile test of the tensile test piece. The high temperature tensile test was performed under the measurement environment of 260° C. after holding the high temperature tensile test piece 260° C. for 100 hours. The evaluation was made based on the following criteria.
  • the obtained aluminum alloy extruded material (columnar article) was processed into a fatigue tensile test piece having a gauge distance of 30 mm and a parallel portion diameter of 8 mm. Then, the high temperature fatigue strength (fatigue strength at 260° C.) was measured by performing a high temperature fatigue test of the tensile test piece. The high temperature fatigue test was performed by holding the fatigue test piece at 260° C. for 100 hours and then testing 500,000 times under the measurement environment of 260° C. at a repetition rate of 3,600 rpm. The evaluation was made based on the following criteria.
  • the obtained aluminum alloy extruded material (columnar article) was processed into a creep test piece having a gauge distance of 30 mm and a parallel portion diameter of 6 mm. Then, the high temperature creep properties (creep properties at 260° C.) was measured by performing a high temperature creep test of the creep test piece. The high temperature creep test was performed under the measurement environment of 260° C. after holding the creep test piece at 260° C. for 100 hours. The creep rupture strength under the conditions of the temperature of 260° C. and the rupture time of 300 hours was calculated and evaluated based on the following criteria.
  • the aluminum alloy extruded materials of Examples 1 to 12 according to the present invention were excellent in various mechanical properties at high temperature (260° C.)
  • the aluminum alloy powder, and the aluminum alloy material formed using the aluminum alloy powder obtained by the production method of the present invention are excellent in mechanical properties at high temperature. Further, since the aluminum alloy extruded material according to the present invention and the aluminum alloy extruded material obtained by the production method of the present invention are excellent in mechanical properties at high temperature, it is suitably used as an internal combustion engine member (internal combustion engine parts) which is rotated at high speed under high temperature, such as turbocharger turbo compressor impeller used for an internal combustion engine of an automobile, etc.

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