Abstract
1. The results of this investigation into the effects of heating and cooling rates in ferritization show that rapid cooling significantly improves the magnetic properties of powder. The ferritization temperature in this case, however, should be 30–40 deg C higher than for furnace-cooled powder. 2. It has been established experimentally in this work that, in repeated, cyclic ferritization, the remanent induction Br, coercive force with respect to inductionBHc, and maximum magnetic energy (BH)max at first increase and then, after the fourth cycle, decrease. With increasing number of ferritization cycles, the coercive force with respect to magnetization intensityIHC steadily diminishes. 3. When ferritization is performed in a thin powder layer, it is sufficient to apply heating at the required temperature for 2 h. Extending the duration of holding in ferritization to 4 h lowers the ferritization temperature by 30–40°C.
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