发明名称 METALLIC POWDER FOR POWDER MAGNETIC CORE AND PROCESS FOR PRODUCING POWDER MAGNETIC CORE
摘要 A pure iron powder of a diameter of 10 to 500 µm and a purity of 99% by mass or more is heated to a temperature in the range of 600 to 1400°C, and a Si-concentrated layer is formed in regions within a depth of 5 µm from the surfaces of the powder particles by gas-phase reaction at a temperature of that range. The average Si concentration in the regions within this depth is controlled in the range of 0.05% to 2% by mass. Thus, a dust core metal powder enhancing the adhesion of insulating material to the particle without degrading compressibility is produced. The resulting dust core maintains a high saturation magnetic flux density and exhibits a low iron loss.
申请公布号 EP2153921(A4) 申请公布日期 2011.08.03
申请号 EP20080764948 申请日期 2008.05.26
申请人 JFE STEEL CORPORATION 发明人 FUJITA, AKIRA;HIRATANI, TATSUHIKO;MAETANI, TOSHIO
分类号 B22F1/00;B22F1/02;B22F3/00;B22F3/24;H01F1/20;H01F41/02 主分类号 B22F1/00
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