ОБРАБОТКА РАСПЛАВОВ МАГНИТНО-ИМПУЛЬСНЫМИ ПОЛЯМИ С ЦЕЛЬЮ УПРАВЛЕНИЯ СТРУКТУРОЙ И СВОЙСТВАМИ ПРОМЫШЛЕННЫХ СИЛУМИНОВ

Computer modeling was used to simulate main force factors of aluminum melt processing by pulsed magnetic fields both in the radial and axial impact pattern. It was found that a shock wave arising after a single pulse propagates throughout the melt volume within 40 μs in the radial impact pattern, and within 416 μs in the axial pattern. Experimental studies of Al–Si–Cu and Al–Si–Cu–Ni industrial silumins confirmed a sustainable modifying effect resulting from the magnetic-pulse treatment (MPT): α-Al dendrites and eutectic silicon crystals are reduced in size, while density and electrical conductivity of as-cast alloys increase along with their mechanical properties and ductility. Based on the experimental studies it was concluded that the best MPT performance is obtained with the axial impact pattern.