EP0341714B1 - Méthode de fabrication de produits de grandes dimensions en alliage d'aluminium - Google Patents

Méthode de fabrication de produits de grandes dimensions en alliage d'aluminium Download PDF

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Publication number
EP0341714B1
EP0341714B1 EP19890108490 EP89108490A EP0341714B1 EP 0341714 B1 EP0341714 B1 EP 0341714B1 EP 19890108490 EP19890108490 EP 19890108490 EP 89108490 A EP89108490 A EP 89108490A EP 0341714 B1 EP0341714 B1 EP 0341714B1
Authority
EP
European Patent Office
Prior art keywords
weight
extrusion
aluminum alloy
extrusion ratio
upset
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19890108490
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German (de)
English (en)
Other versions
EP0341714A1 (fr
Inventor
Jun Kusui
Masahiko Kawai
Yusuke Odani
Yoshinobu Takeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Aluminum KK
Sumitomo Electric Industries Ltd
Original Assignee
Toyo Aluminum KK
Sumitomo Electric Industries Ltd
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Publication date
Application filed by Toyo Aluminum KK, Sumitomo Electric Industries Ltd filed Critical Toyo Aluminum KK
Publication of EP0341714A1 publication Critical patent/EP0341714A1/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
    • 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
    • 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
    • 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
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent

Definitions

  • the present invention relates to a method of forming aluminum alloy product.
  • Products of aluminum alloys prepared by the powder metallurgy process exhibit highly improved heat resistance, wear resistance, and like properties in comparison with the products prepared by the ingot metallurgy process (hereinafter referred to as "IM process") because the products obtained by the P/M process can contain additional elements in larger amounts with no segregation and much more uniformly dispersed in the aluminum matrix than the products prepared by the IM process.
  • P/M aluminum alloy products are usually produced by extruding a powdery, flaky or ribbon-like material to obtain a billet and processing the billet to the desired shapes or forms.
  • the oxide films on the surfaces of the powder particles, flakes or ribbons are fractured and the exposed inner aluminum portions are pressed against each other to form a strong bonding.
  • the aluminum oxide films are fractured; however, since the shearing force is relatively small and the deformation of each particle is not so large and uniform as in the case of extrusion, the bond between the particles is not so strong as in the extruded product.
  • the extrusion ratio in conducting the above extrusion by the P/M process is usually 10 or more, preferably 20 or more to obtain a strong bonding of each particle.
  • the extrusion by the P/M process usually requires much higher forces than the extrusion by the IM process because the aluminum alloys used in the former process contain larger amounts of alloying elements. For these limitations, aluminum alloy materials obtained by the P/M process are difficult to employ for producing large-sized products.
  • EP-A-0 144 898 discloses a P/M process for preparing an aluminum alloy product at an extrusion ratio not less than 4, exemplified is an extrusion ratio of 6.5.
  • the preferred extrusion ratio mentioned in EP-A-0 144 898 is higher than 10. In this document is said that extrusion ratios of less than 4 were not possible because the materials obtained would not have the sufficient strength.
  • the object of the invention is to provide a process capable of producing a strong product by extrusion of a P/M aluminum alloy even under an extremely low extrusion ratio of 2 to 5, provided that the extrusion ratios of 4 and more are excluded.
  • the present invention provides: a process for preparing a P/M aluminum alloy product comprising: extruding, at a temperature between 350 and 500°C and at an extrusion ratio of 2 to 5, provided that the extrusion ratios of 4 and more are excluded an aluminum alloy powder consisting of (a) 5 to 30% by weight of Si, (b) 0.5 to 10% by weight of at least one of the elements Cu, Mg, Fe, Ni, Cr, Mn, Mo, Zr and V with the proviso that the total amount of these elements does not exceed 30% by weight, and (c) aluminum in the remaining amount, apart from impurities
  • an aluminum alloy powder consisting of (a) 5 to 30% by weight of Si, (b) 0.5 to 10% by weight of at least one of the elements Cu, Mg, Fe, Ni, Cr, Mn, Mo, Zr and V with the proviso that the total amount of these elements does not exceed 30% by weight, and (c) aluminum in the remaining amount, apart from impurities
  • the aluminum alloys used in the invention are in a powdery form and contain as alloying elements (a) 5 to 30% by weight of Si and (b) 0.5 to 10% by weight of at least one of the elements Cu, Mg, Fe, Ni, Cr, Mn, Mo, Zr and V with the proviso that the total amount of these elements does not exceed 30% by weight.
  • the powder particles are strongly bonded each other even at a low extrusion ratio and the extruded material exhibits substantially uniform strength and elongation irrespective of the extrusion ratio.
  • the amount of Si is less than 5% by weight of the alloy, the bonding strength of the particles is low; whereas the use of Si of more than 30% by weight results in the excess volume of primary Si particles in the matrix which leads to a reduction in the toughness of the alloy.
  • the amount of Si is 10 to 14% by weight of the alloy.
  • An amount of Cu, Mg, Fe, Ni, Cr, Mn, Mo, Zr and V of less than 0.5% by weight results in inferior heat resistance and strength of the extruded material whereas an amount of more than 10% by weight results in lower toughness with the formation of intermetallic compounds.
  • the total amount of these alloying elements in excess of 30% by weight also leads to a reduction of toughness of the alloy.
  • the aluminum alloy powder of the invention preferably contains 3 to 5% by weight of Fe, 3 to 5% by weight of Ni; 0.5 to 2.5% by weight of Mo and 0.5 to 2.5% by weight of Zr, the total amount of Mo and Zr being 2 to 5% by weight.
  • the extruded material prepared according to the invention using an aluminum alloy powder of specified composition has a high critical upset reduction of up to 60 or 70% irrespective of the extrusion ratio.
  • the extruded material of the invention can be upset forged in the radial directions with an upset reduction of 30 to 80% at 400 to 530°C.
  • a billet produced at a low extrusion ratio of 2 to 5 provided that the extrusion ratios of 4 and more are excluded does not show good forgeability and cannot be upset forged at a temperature between 400 and 530°C to a upset reduction of 30 to 80%.
  • the extruded material prepared according to the invention can be further die-forged to a shape as indicated in Fig. 1 which has an enlarged diameter more than 1.5 times the initial diameter of the extruded material.
  • the forged product thus obtained is free from internal defects and has a theoretical density of 100%.
  • the direction indicated with the arrow in Fig. 1 (the direction of centrifugal force) coincides with the flow direction of the alloy powder during the extrusion (the direction of the highest strength) with the most favorable result.
  • a very strong bond can be produced in an extruded material at a low extrusion ratio of 2 to 5, provided that the extrusion ratios of 4 and more are excluded.
  • Each of the aluminum alloy powders thus prepared was cold pressed to a preform 30 mm in diameter and 80 mm in height and then extruded at 450°C at varying extrusion ratios. Test pieces were prepared from the extruded materials, and tensile tests were conducted at room temperature and at 300°C respectively.
  • Tables 2-A, 2-B, 2-C, 3-A, 3-B and 3-C indicate that the extruded materials obtained from the aluminum alloys of the invention (Nos.1 to 7 and Nos.11 to 14) have substantially uniform strength and elongation independent of the extrusion ratio.
  • the aluminum alloys of the invention give sufficient strength and elongation even at a low extrusion ratio of 3.
  • Test pieces (7 mm in diameter and 10.5 mm in length) were prepared from the extruded materials obtained in the same manner as in Example 1.
  • Table 4 shows that extruded materials produced from aluminum alloys of the invention (Nos. 1 to 7 and Nos.11 to 14) have about 60 to about 70% of critical reduction irrespective of the extrusion ratio.
  • the rod was cut to prepare a test piece of a length of 175 mm and the test piece was upset forged at 480°C at an upset reduction of 60%. After the upset forging, the test piece was found to exhibit no cracking and a forged material 175 mm in diameter and 60 mm in height could be produced from the piece.
  • An aluminum alloy containing 12% by weight of Si, 4% by weight of Fe, 4% by weight of Ni, 2% by weight of Mo and 1.5% by weight of Zr was powdered to prepare a powdery product (less than 140 ⁇ m particle size (minus 100 mesh)).
  • the rod was cut to a length of 300 mm and die-forged in two stages at 480°C to obtain a product which had the shape and sizes as shown in Fig. 2.
  • the product shown in Fig. 2 was machined to prepare standard tensile strength test pieces from the portions indicated as (a), (b) and (c).
  • Table 5 shows tensile strength and elongation of the test pieces at 300°C.
  • Test piece Tensile strength MPa (kg/mm2) Elongation (%) (a) 200,90 (20.5) 6.3 (b) 202,86 (20.7) 6.4 (c) 211,68 (21.6) 6.0
  • a rotating part machined from the forged product of the invention is especially useful for various devices or equipments operating at high rotating speed since the portion where the highest centrifugal force is exerted has highest strength.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Forging (AREA)

Claims (5)

  1. Méthode de fabrication d'un produit en alliage d'aluminium en métallurgie des poudres, comprenant:
       l'extrusion, à une température comprise entre 350 et 500°C et à un rapport d'extrusion compris entre 2 et 5, étant entendu que les rapports d'extrusion de 4 et plus sont exclus, d'une poudre d'alliage d'aluminium composée de :
    (a) 5 à 30% en poids de Si,
    (b) 0,5 à 10% en poids d'au moins un des éléments Cu, Mg, Fe,Ni , Cr, Mn, Mo, Zr et V à condition que la quantité totale de ces éléments ne dépasse pas 30% en poids, et
    (c) aluminium pour la quantité restante, en dehors des impuretés.
  2. Méthode suivant la revendication 1, dans laquelle l'alliage d'aluminium contient 5 à 30% en poids de Si, 3 à 5% en poids de Fe, 3 à 5% en poids de Ni, 0,5 à 2,5% en poids de Mo et 0,5 à 2,5% en poids de Zr,et la quantité totale de Mo et Zr est de 2 à 5% en poids.
  3. Méthode suivant la revendication 1, qui comprend en outre le forgeage de la matière extrudée, à une température de 400 à 530°C.
  4. Méthode suivant la revendication 3, dans laquelle la matière extrudée est forgée par matriçage dans les directions radiales.
  5. Méthode suivant la revendication 3, dans laquelle la matière extrudée est forgée par refoulement dans les directions radiales.
EP19890108490 1988-05-12 1989-05-11 Méthode de fabrication de produits de grandes dimensions en alliage d'aluminium Expired - Lifetime EP0341714B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP11562588 1988-05-12
JP115625/88 1988-05-12
JP1091587A JP2787466B2 (ja) 1988-05-12 1989-04-10 大径の製品用アルミニウム合金の成形方法
JP91587/89 1989-04-10

Publications (2)

Publication Number Publication Date
EP0341714A1 EP0341714A1 (fr) 1989-11-15
EP0341714B1 true EP0341714B1 (fr) 1994-01-19

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Family Applications (1)

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EP19890108490 Expired - Lifetime EP0341714B1 (fr) 1988-05-12 1989-05-11 Méthode de fabrication de produits de grandes dimensions en alliage d'aluminium

Country Status (3)

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EP (1) EP0341714B1 (fr)
JP (1) JP2787466B2 (fr)
DE (1) DE68912394T2 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0366134B1 (fr) * 1988-10-27 1994-01-19 Toyo Aluminium Kabushiki Kaisha Alliage d'aluminium utile pour les procédés de la métallurgie de poudres
JPH03177530A (ja) * 1988-10-27 1991-08-01 Toyo Alum Kk 耐熱耐クリープ性アルミニウム合金
JPH03180440A (ja) * 1989-08-23 1991-08-06 Kubota Corp 耐熱高強度Ａｌ合金材
JPH05117797A (ja) * 1990-04-18 1993-05-14 Toyo Alum Kk 靭性に優れた耐熱耐クリープ性アルミニウム合金
EP0533950B1 (fr) * 1991-04-03 1997-08-20 Sumitomo Electric Industries, Ltd. Rotor en alliage d'aluminium pour pompe a l'huile et procede de fabrication dudit rotor
JP3123114B2 (ja) * 1991-05-23 2001-01-09 住友電気工業株式会社 高精度アルミニウム合金部品の製造方法
JPH04323342A (ja) * 1991-04-24 1992-11-12 Sumitomo Electric Ind Ltd 遷移元素添加アルミニウム粉末合金及びその製造方法
JPH0579468A (ja) * 1991-05-02 1993-03-30 Mitsubishi Materials Corp 流体機械用ギヤの製造方法
JP3240182B2 (ja) * 1992-04-28 2001-12-17 マツダ株式会社 マグネシウム合金製部材の製造方法
DE19532253C2 (de) * 1995-09-01 1998-07-02 Peak Werkstoff Gmbh Verfahren zur Herstellung von dünnwandigen Rohren (II)
DE19532244C2 (de) * 1995-09-01 1998-07-02 Peak Werkstoff Gmbh Verfahren zur Herstellung von dünnwandigen Rohren (I)
DE19532252C2 (de) * 1995-09-01 1999-12-02 Erbsloeh Ag Verfahren zur Herstellung von Laufbuchsen
GB2316094B (en) * 1996-08-06 2000-04-12 Kubota Kk Cast iron pipe surface-modified for corrosion prevention and method of modifying the cast iron pipe surface for corrosion prevention
DE10006269A1 (de) 2000-02-12 2001-08-16 Bayerische Motoren Werke Ag Verfahren zur Herstellung eines mit einem Reibpartner über eine Gleitfläche zusammenwirkenden Metall-Bauteiles für ein Antriebsaggregat, insbesondere Brennkraftmaschine
US8926898B2 (en) 2005-03-29 2015-01-06 Kobe Steel, Ltd. Al base alloy excellent in heat resistance, workability and rigidity
CN103357803A (zh) * 2013-06-09 2013-10-23 大连冶金轴承股份有限公司 一种22224调心球面滚子压型下模毛坯的加工方法
JP2019026859A (ja) * 2017-07-25 2019-02-21 昭和電工株式会社 高速動部品用アルミニウム合金鍛造品、およびその製造方法
FR3083478B1 (fr) * 2018-07-09 2021-08-13 C Tec Constellium Tech Center Procede de fabrication d'une piece en alliage d'aluminium
FR3083479B1 (fr) * 2018-07-09 2021-08-13 C Tec Constellium Tech Center Procede de fabrication d'une piece en alliage d'aluminium

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
US2978798A (en) * 1955-08-31 1961-04-11 Metallgesellschaft Ag Aluminum and silicon containing metal powder and method of producing workpieces therefrom
FR1247180A (fr) * 1959-02-03 1960-11-25 Schmidt Gmbh Karl Alliages d'aluminium pour blocs-cylindres, chemises de cylindre et culasses de moteurs à combustion interne
CA1230761A (fr) * 1982-07-12 1987-12-29 Fumio Kiyota Poudre d'alliage d'aluminium a haute resistance a la chaleur et a l'usure, et element connexe
DE3481322D1 (de) * 1983-12-02 1990-03-15 Sumitomo Electric Industries Aluminiumlegierungen und verfahren zu ihrer herstellung.
JPS6184343A (ja) * 1984-10-02 1986-04-28 Honda Motor Co Ltd アルミニウム合金製部材の製造方法
CA1284896C (fr) * 1984-10-23 1991-06-18 Paul S. Gilman Methode de production d'alliages d'aluminium durci par phase dispersee
GB2167442B (en) * 1984-11-28 1988-11-16 Honda Motor Co Ltd Structural member made of heat-resisting high-strength al-alloy
JPS61243138A (ja) * 1985-04-17 1986-10-29 Honda Motor Co Ltd 耐熱高強度Ａｌ焼結合金製構造用部材の製造方法
JPS6342344A (ja) * 1986-08-06 1988-02-23 Honda Motor Co Ltd 高温強度特性に優れた粉末冶金用Ａｌ合金
FR2604186A1 (fr) * 1986-09-22 1988-03-25 Peugeot Procede de fabrication de pieces en alliage d'aluminium hypersilicie obtenu a partir de poudres refroidies a tres grande vitesse de refroidissement
JPS6456806A (en) * 1987-08-27 1989-03-03 Sumitomo Electric Industries Spiral parts made of aluminum powder alloy having low strain
JP2746390B2 (ja) * 1988-10-07 1998-05-06 住友軽金属工業株式会社 引張および疲労強度にすぐれたアルミニウム合金の製造方法

Also Published As

Publication number Publication date
EP0341714A1 (fr) 1989-11-15
JP2787466B2 (ja) 1998-08-20
JPH0250902A (ja) 1990-02-20
DE68912394T2 (de) 1994-05-26
DE68912394D1 (de) 1994-03-03

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