FIELD: machine building. SUBSTANCE: solid particle of inoculator are added into stream of cast metal. Its quantity is determined according formula m = 100·М/P·[40C/L+C(Tl-20)], where m is quantity of solid particles of inoculator(kg), M is mass of cast melt (kg), P is desired porosity (%), C is specific heat capacity of melt, L is specific heat of fusion of particles, Tl is liquidus temperature (C), 40 is coefficient (C). Particles of said inoculator are identical to those of cast. EFFECT: improves distribution of porosity in thus prepared cast.
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