EP0366134B1 - Aluminium-Legierung, verwendbar im Pulvermetallurgieverfahren - Google Patents

Aluminium-Legierung, verwendbar im Pulvermetallurgieverfahren Download PDF

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Publication number
EP0366134B1
EP0366134B1 EP89119912A EP89119912A EP0366134B1 EP 0366134 B1 EP0366134 B1 EP 0366134B1 EP 89119912 A EP89119912 A EP 89119912A EP 89119912 A EP89119912 A EP 89119912A EP 0366134 B1 EP0366134 B1 EP 0366134B1
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EP
European Patent Office
Prior art keywords
aluminum alloy
weight
extruded
aluminum
resistance
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
EP89119912A
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English (en)
French (fr)
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EP0366134A1 (de
Inventor
Jun Kusui
Masahiko Kawai
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
Original Assignee
Toyo Aluminum KK
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
Priority claimed from JP1265610A external-priority patent/JPH03177530A/ja
Application filed by Toyo Aluminum KK filed Critical Toyo Aluminum KK
Publication of EP0366134A1 publication Critical patent/EP0366134A1/de
Application granted granted Critical
Publication of EP0366134B1 publication Critical patent/EP0366134B1/de
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Classifications

    • 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 an aluminum alloy which provides a product having a highly improved strength at elevated temperatures and remarkable resistance to creep when used in powder metallurgy process.
  • Products of an aluminum alloy prepared by a powder metallurgy process exhibit highly improved heat resistance, wear resistance, and like properties in comparison with the products prepared by an ingot metallurgy process (hereinafter referred to as "IM process") because the products by the P/M process can contain additional elements in larger amounts with no segregation and being more uniformly dispersed in the aluminum matrix than the products prepared by the IM process.
  • P/M aluminum alloy products are usually produced by hot extrusion of a powdery, flaky or ribbon-like quickly solidified 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 strong bonding.
  • aluminum oxide films are fractured; however, since the shearing force is relatively small and deformation of each particle is not so large and uniform as in the case of extrusion, the bond between 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 alloy used in the former process contains 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.
  • aluminum alloys conventionally used in the P/M process give a product which cannot fully meet the severe requirements such as high strengths at elevated temperatures up to 300°C, high resistance to creep, etc.
  • US-A-3325279 relates to aluminum high silicon alloys and discloses an alloy containing 29% Si, 3.6% Fe and 2.7% Ti, with the balance Al.
  • EP-A-0341714 (document in accordance with Article 54(3) EPC) discloses an aluminum alloy containing 25% Si, 3% Fe, 5% Ni and 1% Mo produced by a P/M process and extruded at 450°C at varying extrusion ratios between 3:1 and 20:1.
  • An object of the invention is to provide a P/M aluminum alloy which can be extruded under a low extrusion ratio of 10 or lower.
  • Another object of the invention is to provide a P/M aluminum alloy which can be extruded even under an extremely low extrusion ratio of 2 to 5.
  • Still another object of the invention is to provide a P/M aluminum alloy capable of producing an extruded product excellent in strength at high temperatures and resistance to creep.
  • the powder particles are strongly bonded to each other even at a low extrusion ratio and the extruded material exhibits substantially uniform strength and elongation irrespective of the extrusion ratio. If an aluminum alloy powder with the composition outside the specified range is used, an extruded material with strong bonding cannot be obtained at a low extrusion ratio of 10 or 5 to 2 at a temperature of 400 to 500°C.
  • 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.
  • Fe, Ni, Cr and Mn mainly contribute to the improvement of heat resistance and strength.
  • the amount of at least one of Fe, Ni, Cr and Mn in less than 0.5% by weight results in inferior heat resistance and strength of the extruded material whereas the amount thereof in more than 10% by weight results in lower toughness with the formation of coarse intermetallic compounds.
  • the total amount of these alloying elements in excess of 20% by weight also leads to a reduction of toughness of the alloy.
  • Mo, Zr, V and Ti mainly contribute to the improvement of heat resistance and creep resistance.
  • the amount of at least one of Mo, Zr, V and Ti in less than 0.3% by weight does not significantly improve the resistance to heat and creep.
  • the amount thereof exceeds 3% by weight coarse intermetallic compounds are formed to lower the toughness of the alloy.
  • the total amount is up to 5% by weight of the alloy to prevent the formation of coarse intermetallic compounds which lead to reduced toughness.
  • the aluminum alloy of the invention contains 5 to 30% by weight of Si, 2 to 5% by of Fe, 2 to 5% by weight of Ni, 0.5 to 3% by weight of Mo and 0.5 to 3% by weight of Zr provided that the total amount of Mo and Zr is more than 2% by weight and less than 5% by weight.
  • the aluminum alloy of the invention containing alloying elements in the above ranges shows much more balanced properties of the improved strength, toughness and resistance to creep at elevated temperatures.
  • the aluminum alloys with alloying elements in the above range are most useful as the materials for machine components, etc.
  • the extruded product formed from the aluminum alloy of the invention exhibits high resistance to heat and creep.
  • Table 1 Aluminum alloys containing alloying elements as indicated in Table 1 below were air-atomized into particles and sieved to prepare powders by passing through sieve openings of 150 ⁇ m x 100 ⁇ m (powders of minus 100 mesh).
  • 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 an extrusion ratio of 3. Test pieces were prepared from the extruded materials, and tensile tests and creep tests were conducted at 300°C.
  • rupture time indicates the period of time required for a test piece to rupture when it is exposed to a stress of 78.4 MPa(8 kg/mm2) at 300°C.
  • Table 2 indicates that the extruded materials obtained from the aluminum alloys of the invention have high tensile strength and elongation and exhibit good resistance to creep. Particularly, the extruded products produced from alloy Nos.13 to 16 are better balanced in resistance to creep, tensile strength at elevated temperatures and toughness.

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

Claims (4)

  1. Aluminiumlegierung mit 5 bis 30 Gew.-% Si, 2 bis 5 Gew.-% Fe, 2 bis 5 Gew.-% Ni, 0,5 bis 3 Gew.-% Mo, 0,5 bis 3 Gew.-% Zr und Rest Aluminium, mit der Maßgabe, daß die Gesamtmenge von Mo und Zr im Bereich von mehr als 2 Gew.-% bis weniger als 5 Gew.-% liegt.
  2. Produkt aus einer Aluminiumlegierung, hergestellt durch Extrudieren eines Aluminiumlegierungsmaterials in Pulverform, wobei die Aluminiumlegierung eine Zusammensetzung nach Anspruch 1 aufweist.
  3. Produkt aus einer Aluminiumlegierung nach Anspruch 2, wobei das Aluminiumlegierungsmaterial bei einer Temperatur von 400 bis 500 °C und mit einem Extrusionsverhältnis von 2 bis 10 extrudiert wird.
  4. Produkt aus einer Aluminiumlegierung nach Anspruch 3, wobei das Aluminiumlegierungsmaterial mit einem Extrusionsverhältnis von 2 bis 5 extrudiert wird.
EP89119912A 1988-10-27 1989-10-26 Aluminium-Legierung, verwendbar im Pulvermetallurgieverfahren Expired - Lifetime EP0366134B1 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP27216788 1988-10-27
JP272167/88 1988-10-27
JP25432489 1989-09-28
JP254324/89U 1989-09-28
JP1265610A JPH03177530A (ja) 1988-10-27 1989-10-11 耐熱耐クリープ性アルミニウム合金
JP265610/89U 1989-10-11

Publications (2)

Publication Number Publication Date
EP0366134A1 EP0366134A1 (de) 1990-05-02
EP0366134B1 true EP0366134B1 (de) 1994-01-19

Family

ID=27334316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89119912A Expired - Lifetime EP0366134B1 (de) 1988-10-27 1989-10-26 Aluminium-Legierung, verwendbar im Pulvermetallurgieverfahren

Country Status (1)

Country Link
EP (1) EP0366134B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111051549A (zh) * 2017-04-05 2020-04-21 阿马格铸造公司 原材料及其应用和使用此原材料的增材制造方法
CN111534727A (zh) * 2020-05-07 2020-08-14 江苏兆铝金属制品有限公司 一种高强度车灯专用铝合金材料及其制备方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05311302A (ja) * 1991-10-22 1993-11-22 Toyota Motor Corp 高温強度および耐摩耗性に優れた低摩擦アルミニウム合金
EP0561204B1 (de) * 1992-03-04 1997-06-11 Toyota Jidosha Kabushiki Kaisha Hitzebeständiges Aluminiumlegierungspulver, hitzebeständige Aluminiumlegierung und hitzebeständiges und verschleissfestes Verbundmaterial auf Basis von Aluminiumlegierung
US5464463A (en) * 1992-04-16 1995-11-07 Toyota Jidosha Kabushiki Kaisha Heat resistant aluminum alloy powder heat resistant aluminum alloy and heat and wear resistant aluminum alloy-based composite material
FR2690927B1 (fr) * 1992-05-06 1995-06-16 Pechiney Aluminium Alliages de moulage a base d'aluminium ayant une bonne resistance au fluage a chaud.
EP0600474B1 (de) * 1992-12-03 1997-01-29 Toyota Jidosha Kabushiki Kaisha Hoch warmfeste und verschleissfeste Aluminiumlegierung
DE19532252C2 (de) * 1995-09-01 1999-12-02 Erbsloeh Ag Verfahren zur Herstellung von Laufbuchsen
DE19532244C2 (de) * 1995-09-01 1998-07-02 Peak Werkstoff Gmbh Verfahren zur Herstellung von dünnwandigen Rohren (I)
DE19532253C2 (de) * 1995-09-01 1998-07-02 Peak Werkstoff Gmbh Verfahren zur Herstellung von dünnwandigen Rohren (II)
DE102004050484A1 (de) * 2004-10-15 2006-04-20 Peak Werkstoff Gmbh Legierung auf Basis von Aluminium sowie Formteil aus dieser Legierung
CN107034391B (zh) * 2017-03-28 2018-12-25 龙口市大川活塞有限公司 一种活塞用铝合金及其制备方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341714A1 (de) * 1988-05-12 1989-11-15 Sumitomo Electric Industries, Ltd. Verfahren zur Verformung eines grossen Produktes aus Aluminiumlegierung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3325279A (en) * 1965-12-03 1967-06-13 Dow Chemical Co Aluminum-high silicon alloys
US4135922A (en) * 1976-12-17 1979-01-23 Aluminum Company Of America Metal article and powder alloy and method for producing metal article from aluminum base powder alloy containing silicon and manganese
CA1230761A (en) * 1982-07-12 1987-12-29 Fumio Kiyota Heat-resistant, wear-resistant, and high-strength aluminum alloy powder and body shaped therefrom
FR2537656B1 (fr) * 1982-12-08 1987-12-24 Pechiney Aluminium Inserts pour pistons de moteurs diesel en alliages d'aluminium-silicium ayant une resistance a chaud et une usinabilite ameliorees
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341714A1 (de) * 1988-05-12 1989-11-15 Sumitomo Electric Industries, Ltd. Verfahren zur Verformung eines grossen Produktes aus Aluminiumlegierung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111051549A (zh) * 2017-04-05 2020-04-21 阿马格铸造公司 原材料及其应用和使用此原材料的增材制造方法
CN111051549B (zh) * 2017-04-05 2022-02-22 阿马格铸造公司 原材料及其应用和使用此原材料的增材制造方法
CN111534727A (zh) * 2020-05-07 2020-08-14 江苏兆铝金属制品有限公司 一种高强度车灯专用铝合金材料及其制备方法

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Publication number Publication date
EP0366134A1 (de) 1990-05-02

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