| 摘要 |
PROBLEM TO BE SOLVED: To provide a dust core having high magnetic permeability and an superior direct-current superimposition property, a winding component, and a manufacturing method which enables easy manufacture of a dust core. SOLUTION: A dust core is obtained by compression-molding powder, obtained by mixing powder of an alloy containing Fe-Si-Al as a principal component and a binder. The alloy powder is made of a powder A at 5-95%, in which the aspect ratio of particles is 5 or more and in which a short-axis length is 50μm or less, and a powder for the remaining part in which the aspect ratio of particles is smaller than that of the powder A and is not less than 1.5. As a manufacturing method for the same, a metal mold and the powder are pre- heated within a temperature range which is not higher that the hardening temperature of the dust core and the binder, and the powder is compression-molded. Binder hardening processing is carried out so as to constrain the shape of a compact.
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