| 摘要 |
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.
|
