SOFT MAGNETIC POWDER, FE-BASED NANO-CRYSTAL ALLOY POWDER, MAGNETIC MEMBER, AND DUST CORE

WIPO Patent Application WO/2020/026949

A1

Provided is a soft magnetic powder which makes it possible to manufacture a dust core having excellent magnetic properties (a low core loss, a high saturation magnetic flux density). A soft magnetic powder having a chemical composition represented by the compositional formula: FeaSibBcPdCueMf excluding unavoidable impurities, wherein, in the compositional formula, M represents at least one element selected from the group consisting of Nb, Mo, Zr, Ta, W, Hf, Ti, V, Cr, Mn, C, Al, S, O and N, the requirements represented by the formulae: 79 at% ≦ a ≦ 84.5 at%, 0 at% ≦ b < 6 at%, 0 at% < c ≦ 10 at%, 4 at% < d ≦ 11 at%, 0.2 at% ≦ e ≦ 0.53 at%, 0 at% ≦ f ≦ 4 at%, and a + b + c + d + e + f = 100 at% are satisfied, the particle diameters are 1 mm or smaller, and the median of the degrees of circularity of particles constituting the soft magnetic powder is 0.4 to 1.0 inclusive.

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YAMAMOTO NAOKI (JP)
TAKASHITA TAKUYA (JP)
NAKASEKO MAKOTO (JP)
KOBAYASHI AKIO (JP)
URATA AKIRI (JP)
CHIBA MIHO (JP)

PCT/JP2019/029302

February 06, 2020

July 25, 2019

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JFE STEEL CORP (JP)
TOKIN CORP (JP)

C22C38/00; B22F1/052; B22F1/08; B22F3/00; C22C33/02; C22C45/02; H01F1/153; H01F1/22; H01F27/255

WO2019065500A1	2019-04-04
WO2018139563A1	2018-08-02

JP2018016829A	2018-02-01
JP2017034091A	2017-02-09
JP6309149B1	2018-04-11
CN108172359A	2018-06-15
JP2019014960A	2019-01-31
JP2010070852A	2010-04-02
JP2014138134A	2014-07-28

See also references of EP 3831975A4

SUGIMURA Kenji (JP)

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