THREE NEW Fe-BASED MICROCRYSTALLINE ALLOYS WITH SUPERIOR MAGNETIC PROPERTIES

Acta Metall Sin

1992, Vol. 28

Issue (6): 76-84 DOI:

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THREE NEW Fe-BASED MICROCRYSTALLINE ALLOYS WITH SUPERIOR MAGNETIC PROPERTIES

ZHANG Yanzhong;NIAN Suzhen Shanghai Iron and Steel Research Institure Correspondent; senior; engineer; Shanghai Iron and Steel research Institute; Shanghai 200940

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ZHANG Yanzhong;NIAN Suzhen Shanghai Iron and Steel Research Institure Correspondent; senior; engineer; Shanghai Iron and Steel research Institute; Shanghai 200940. THREE NEW Fe-BASED MICROCRYSTALLINE ALLOYS WITH SUPERIOR MAGNETIC PROPERTIES. Acta Metall Sin, 1992, 28(6): 76-84.

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Abstract Three new Fe-based microcrystalline alloys, i. e., Fe_(73.1)Cu_(1.2)Nb_(3.2)Si_(12.5)B_(10),Fe_(73)Cu_1Nb_(1.5)Mo_2Si_(12.5)B_(10) and Fe_(73)Cu_1Zr_3C_(0.5)Si_(12.5)B_(10), were developed with superior magneticproperties, e. g., high relative initial permeability of μ_i≥5×10~4, low coercivity of H_c≤1.0A/ m, high effective permeability and low core loses in a considerable wide frequency rangeand high pulse-magnetic permeability under narrow pulse. the optimum value of relative ef-fective permeability, μ_5 is 16×104 under condition of f=1 kHz and H_m=0.4 A / m. Theoptimum values of core loss reach 57.9, 30.2 and 68 W / kg under condition of f=50, 100, 100Hz and B_m=0.5, 0.2, 0.3 T, respectively, These three alloys have superior stability of magneticproperties. Initial permeability may be not chaned duing heating at 130℃ up to 216 h. Themain crystalline phase is ordered phase Fe_(75+y)Si_(25-y) which is ultrafine particles of average size10--20 nm.

Key words: microcrystalline alloy relative initial permeability effective permeability coercivity core lose ultrafine particle

Received: 18 June 1992

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