METHOD FOR PRODUCTION OF SHAPED CASTINGS OF ALUMINIUM-SILICON ALLOYS Russian patent published in 2010 - IPC B22C9/06 B22D17/00 

FIELD: technological processes.

SUBSTANCE: invention relates to the field of metallurgy, namely to methods for production of shaped castings of alloys from aluminium-silicon system under low pressure and may be used in metallurgical and machine-building plants that use low pressure casting for alloys from aluminium-silicon system. Casting is carried out under controlled pressure of less than 1 bar, and cooling in process of crystallisation is carried out with the rate of 0.6-1.8 K/s. After crystallisation structure of castings is obtained, which contains solid solution of alloying elements in aluminium, modified and non-modified eutectics and iron-containing phases: Fe₂SiAl₈ - α-phase, FeSiAl₅ - β-phase, concentrations of which make as follows, in vol. %: solid solution of alloying elements in aluminium 22±3, modified eutectic 70±5, non-modified eutectic 8±2, and sum of iron-containing phases α and β- 0.7±0.2.

EFFECT: shaped castings are produced, which have high strength and plastic properties.

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