FIELD: electrical engineering. SUBSTANCE: method involves manufacturing billet core from iron alloyed with elements of IV-group and enclosure from aluminum alloyed with elements of II-IV groups; heating billet to 180-350 C, forming it into coil, annealing and holding for 0.5-3.5 hours at 1100-1180 C. Enclosure is made from alloy containing, by weight: yttrium 0.1-0.4; calcium 0.01-0.05; silicon 0.1-1.0; aluminum the balance. Core is made from alloy containing, by weight: carbon 0.01=0.05; titanium 0.1-0.3; iron the balance. EFFECT: increased efficiency, reduced discard and increased heat-resistance. 3 cl, 3 tbl
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