METHOD OF LOW-TEMPERATURE PRODUCTION OF FINE-CRYSTALLINE HIGH-SILICON ALUMINIUM-SILICON ALLOY Russian patent published in 2009 - IPC C22C1/00 C22C21/02 C22C35/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to non-ferrous metallurgy, namely to a technique of production of aluminium-silicon alloy containing 25% silicon minimum. The method involves obtaining an intermediate melt with the interval of crystallisation 30°C minimum by introduction into the aluminium melt heated by 60-80°C over the liquidus temperature of the lesser part of the crystalline silicon, mixing, holding ensuring a complete dissolution of the silicon and cooling the intermediate melt, obtaining the alloy melt of the required composition by introduction of the main part of the silicon as crystalline silicon powder clad with aluminium obtained by a combined grinding of the powders of the crystalline silicon and aluminium in the ball crusher to achieve silicon pieces of 3 mcm maximum and concentration 43% by mass maximum into the intermediate melt with the temperature of 20-50°C higher than the one of solidus, mixing, raising the temperature of the resulting alloy melt after dissolution of the mixture of the powders by 50-100°C higher than the one of liquidus and crystallisation of the alloy melt with the rate of 10²-10³°C/sec minimum.

EFFECT: resulting alloy is the base for preparing eutectic and hypereutectic silumins with highly dispersed structure and improved physical-mechanical properties.

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