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1. 发明授权

US07179337B2 Method for producing a soft magnetic material 失效
标题翻译：软磁性材料的制造方法
公开(公告)号：US07179337B2
公开(公告)日：2007-02-20
申请号：US10687894
申请日：2003-10-17
申请人： Yasuyoshi Suzuki , Yurio Nomura , Yoshiaki Nishijima , Shoji Miyake , Yukio Makino , Teppei Satoh
发明人： Yasuyoshi Suzuki , Yurio Nomura , Yoshiaki Nishijima , Shoji Miyake , Yukio Makino , Teppei Satoh
IPC分类号： H01F1/03
CPC分类号： B22F3/105 , B22F1/0088 , B22F2999/00 , H01F41/0246 , B22F2202/11 , B22F2202/13
摘要： The invention provides a method for preparing a soft magnetic material which meets demands for low iron loss, high density, high strength and high productivity. The method comprises a surface oxidation step of forming oxide films on the surfaces of a soft magnetic powder, a step of preparing a molding compound of the soft magnetic powder by mixing a soft magnetic powder and a binder with a predetermined blending ratio, a press molding step of press-molding the molding compound of the soft magnetic powder into a predetermined shape, and a sintering step of sintering the press-molded soft magnetic powder to produce a soft magnetic material, wherein a millimeter wave sintering apparatus or a discharge plasma sintering apparatus is used as a heating means in the surface oxidation step or in the sintering step. Thereby, energy of millimeter waves or discharge plasma acts locally on oxidized surface portions having a large electric resistance of the soft magnetic powder, the surfaces of the soft magnetic powder are locally heated at a temperature near the melting point, and oxidation of the surfaces of the soft magnetic powder (formation of an oxide film) and sintering (diffusional joining between oxide films) are promoted.
摘要翻译：本发明提供一种制备软磁性材料的方法，该方法满足低铁损，高密度，高强度和高生产率的要求。该方法包括在软磁性粉末的表面上形成氧化膜的表面氧化步骤，通过以预定的混合比例混合软磁性粉末和粘合剂来制备软磁性粉末的模塑料的步骤，压制成型将软磁性粉末的模塑料压制成预定形状的步骤，以及将压制成型的软磁性粉末烧结以制造软磁性材料的烧结步骤，其中，使用毫米波烧结装置或放电等离子体烧结装置在表面氧化步骤或烧结步骤中用作加热装置。因此，毫米波或放电等离子体的能量局部地在软磁性粉末的电阻较大的氧化表面部分上作用，软磁性粉末的表面在接近熔点的温度下被局部加热，促进软磁性粉末（氧化膜的形成）和烧结（氧化膜之间的扩散接合）。

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