发明名称 |
METHOD FOR MANUFACTURING POWDER MAGNETIC CORE, POWDER MAGNETIC CORE, AND COIL COMPONENT |
摘要 |
A method for manufacturing a powder magnetic core using a soft magnetic material powder, wherein the method has: a first step of mixing the soft magnetic material powder with a binder, a second step of subjecting a mixture obtained through the first step to pressure forming, and a third step of subjecting a formed body obtained through the second step to heat treatment. The soft magnetic material powder is an Fe-Cr-Al based alloy powder comprising Fe, Cr and Al. An oxide layer is formed on a surface of the soft magnetic material powder by the heat treatment. The oxide layer has a higher ratio by mass of Al to the sum of Fe, Cr and Al than an alloy phase inside the powder. |
申请公布号 |
EP2947670(A1) |
申请公布日期 |
2015.11.25 |
申请号 |
EP20140740461 |
申请日期 |
2014.01.14 |
申请人 |
HITACHI METALS, LTD. |
发明人 |
NISHIO,YOSHIMASA;NOGUCHI,SHIN;NISHIMURA,KAZUNORI;KATOH,TETSUROH;MIHARA,TOSHIO |
分类号 |
H01F41/02;B22F1/00;B22F1/02;B22F3/10;C22C33/02;C22C38/00;H01F1/22;H01F27/255 |
主分类号 |
H01F41/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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