V.D. Belov - Dr.Sc. (Eng.), Professor, Head of Department of Casting Process Technique, Moscow Institute of Steel and Alloys
I.A. Fillipova - Ph.D. (Eng.), Associate Professor, Bauman Moscow State Technical University, Kaluga Branch
V.E. Khaichenko - Lecturer, Department of Materials-Processing Technology, Bauman Moscow State Technical University, Kaluga Branch. E-mail: katran-ogmet-04@yandex.ru

Now, to increase of properties of silumins use various methods of processing of fusions: modifying, flux and filtrational refinement, purge gas, etc. Thus in modifying of fusion there is the greatest potential of increase of their functional properties. In recent years the new direction in research and receiving materials with a favorable combination of properties of aluminum alloys - training from a liquid state, fusion cooling with a speed at which this or that metastable condition is formed is developed. Influence of speed of cooling on a microstructure of an alloy of AK7M2 and influence of the fast-cooled additives of this alloy received by training from a liquid state, on structure and property investigated on a basic alloy of AK7M2. The fast-cooled alloy AK7M2 in the form of granules of 5,10 and 20 mm in size received in the conditions of foundry division of Kalugatransmash plant. The plates 0,3-0,5 mm thick tempered from a liquid state received by a technique developed on chair of technology of foundry processes Moscow institute of steel and alloys МИСиС. Speed of cooling of granules at crystallization made 102-104 Fps, plates - 105-106 Fps. For modifying of an alloy of AK7M2 into its fusion at a temperature of 720°C entered AK7M2 in the form of granules and plates in number of 0,5 is BAREFOOT; 1,0; 2,0 and 3,0% from the weight of liquid metal. From the obtained experimental data follows that with increase of quantity entered into fusion AK7M2 in the form of granules and plates, strength by a gap and relative lengthening of an alloy of AK7M2 increase. Thus with reduction of the size of granules reached level of mechanical properties of an alloy of AK7M2 is raises. It is established that at input in fusion of AK7M2 of the fast-cooled alloy of the same chemical composition, it carries out function of the modifier and crushes its structure. Modifying is promoted by entering into fusion together with furnace charge of alien particles - the potential ready centers of crystallization of a phase αAl. The received results suggest that the principle of self-modifying of an alloy of AK7M2 can be applied by the same alloy tempered from a liquid state to the wide nomenclature of aluminum alloys.