FIELD: metallurgy.
SUBSTANCE: invention covers the alloys FeaBbSicPxCyCuz, where 79≤a≤86 at.%, 5≤b≤13 at.%, 0<c≤8 at.%, 1≤x≤8 at.%, 0≤y≤5 at.%, 0.4≤z≤1,4 at.% and 0.08≤z/x≤0.8, and FeaBbSiePxCyCu, where 81≤a≤86 at.%, 6≤b≤10 at.%, 2≤c≤8 at.%, 2≤x≤5 at.%, 0≤y≤4 at.%, 0.4≤z≤1.4 at.% and 0.08≤z/x≤0.8. Proposed method comprises producing the alloy to be heat treated under condition that temperature rise rate makes 100°C or more per minute and that process temperature is not lower than that the alloy crystallisation start.
EFFECT: alloy permeability of 10000 or more and magnetic induction saturation of 1,65 Tl or more.
14 cl, 4 dwg, 21 tbl, 74 ex
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