Thermo-Physical Parameters Determination of Nano-Crystalline Fe_(72.5)C_(u1)Nb2Mo_(1.5)Si_(14)B_9 Alloy for Twisted Magnetic Cores Heat Treatment Optimization

摘要

Thermophysical parameters of Finemet-type initially amorphous alloy produced using rapid quenching technique were determined. The temperature intervals of phase and structure changes have been obtained using calorimetry and non-ambient X-ray diffraction methods. The electric resistance data were recalculated to alloy electrical conductivity which it was recalculated to heat conductivity using the Wiedemann-Franz law. Resulting parameters were used for heat processes simulation that occurs in amorphous material of built-up transformer core during annealing in nanocrystallization temperature interval. Heat treatment of different sizes twisted magnetic cores was optimized.