High strength wear resistant aluminium alloys

Details High strength wear resistant aluminium alloys High strength wear resistant aluminium alloys

C - Chemistry, Metallurgy

22

C

75/84

C22C 21/02 (2006.01) C22C 21/04 (2006.01) C22F 1/043 (2006.01)

Patent

CA 1175687

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.

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