Patent ID: 6638375
Filing Date: 2003-10-28
Classification: B32B,C22C,F16C

Abstract:
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 Alâ€”Siâ€”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 &mgr;m and the hard particles at the surface have been crushed such that they have a maximum diameter ranging between 1 and 20 &mgr;m 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.