High strength wear resistant aluminium alloys and process

Abstract

Aluminium-silicon alloys of the following composition by weight: ______________________________________ Si 12-15% Cu 1.5-5.5%, preferably 1.5-4% Ni 1.0-3.0% Mg 0.1-1.0% preferably 0.4-1.0% Fe 0.1-1.0% preferably 0.1-0.5% Mn 0.1-0.8% Zr 0.01-0.1% Modifier (preferably Sr) 0.001-0.1% preferably 0.01-0.05% Ti 0.01-0.1% Al Remainder, apart from impurities. ______________________________________ Superior properties are obtained by control of growth rate of the solid phase during solidification and the temperature gradient at the solid-liquid interface. The alloys of the invention are suitable for a wide variety of applications, including brake calipers and drums, piston/bore applications in internal combustion engines and a number of other components in engines, compressors and electric motors. A particular application of the alloys of the invention is in aluminium cylinder heads.

Dependencies are inferred from the claim text.