METHOD FOR MODIFYING THE GRAIN SIZE OF CAST PRODUCTS OBTAINED FROM COMMERCIAL MELTS

The invention relates to casting. The inventive method for modifying the grain size of cast products consists in carrying out an uniform volume cooling with a rate of 2-10 DEG C/sec in artificial gravitation fields by gradually increasing a gravitational coefficient up to 1000 and in uniformly and sufficiently slowly cooling a melt in the field of force of a centrifuge, thereby in modifying the grain size of a crystalline phase in an anomalous manner along with the gravitation coefficient growth from 10 to 1000. According to said method, at the beginning, the grain size decreases in conformity with the prior art and, afterwards, increases, with a gravitational coefficient specific for each type of melt, in such a way that monostructures are obtained.; The further increase of the gravitational coefficient results in the sharp fall of the grain size and, starting from a certain g-force value, the grain size again slowly increases.