Aluminum bearing alloy
AssigneeDaido Metal Company Ltd.
InventorsMasahito Fujita, Yukihiko Kagohara, Koichi Yamamoto, Takayuki Shibayama
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Abstract
An aluminum bearing alloy includes, by mass, 3 to 40% Sn, 0.5 to 7% Si, 0.05 to 2% Fe, balance of Al, and unavoidable impurities. In the alloy, a ternary-element intermetallic compound of Al—Si—Fe and Si particles are contained as hard particles.
Claims14
An aluminum bearing alloy comprising, by mass,
- 3 to 40% Sn, 0.5 to 7% Si, 0.05 to 2% Fe, balance of Al, and unavoidable impurities, said bearing alloy having been melted and cast to form a casting, quenched and thereafter machined into an aluminum bearing alloy layer,
- wherein a ternary-element intermetallic compound of Al—Si—Fe and Si particles are contained in said aluminum bearing alloy as hard particles,
- wherein said aluminum bearing alloy is substantially free of Pb, and
- wherein the hard particles have been formed by quenching the casting so as to have a diameter ranging between 40 and 50 μm and the hard particles at the surface have been crushed such that they have a maximum diameter ranging between 1 and 20 μm on a surface of said bearing alloy layer, and a number of the hard particles for every 1 mm2 ranges between 6 and 100 by said casting having been machined after guenching to crush the hard particles.
An aluminum bearing alloy having a surface and consisting of, by mass, 6 to 20% Sn, 2 to 6% Si, 0.07 to 1% Fe, balance of Al, and unavoidable impurities, wherein a ternary-element intermetallic compound of Al—Si—Fe and Si particles are contained as hard particles with said hard particles of said Al—Si—Fe compound at the surface having sharp edges, and optionally
- (1) one or more of Mn, V, Mo, Cr, Co, Ni and W in a total amount of 0.01% to 3%,
- (2) one or more of B, Ti or Zr in a total amount of 0.01% to 2%,
- (3) one or more of Mn, V, Mo, Cr, Co, Ni or W in a total amount of 0.01% to 3%, and one or more of B, Ti or Zr in a total amount of 0.01% to 2%,
- (4) one or more of Cu, Mg or Zn in a total amount of 0.1 to 5%,
- (5) one or more of Mn, V, Mo, Cr, Ca, Ni or W in a total amount of 0.01% to 3%, and one or more of Cu, Mg or Zn in a total amount of 0.1 to 5%,
- (6) one or more of B, Ti or Zr in a total amount of 0.01% to 2%, and one or more of Cu, Mg or Zn in a total amount of 0.1 to 5%, or
- (7) one or more of Mn, V, Mo, Cr, Co, Ni or W in a total amount of 0.01% to 3%, and one or more of B, Ti or Zr in a total amount of 0.01% to 2%, and one or more of Cu, Mg or Zn in a total amount of 0.1 to 5%.
Dependencies are inferred from the claim text.