发明名称 |
PRODUCTION PROCESS OF DUST CORE AND DUST CORE OBTAINED THEREBY |
摘要 |
Provided is a dust core excellent in flux density, iron loss, and mechanical strength. A production process of a dust core according to the invention includes a step of compacting a mixture obtained by mixing an iron-based soft magnetic powder for powder compact having a phosphate conversion coating film on the surface of an iron-based soft magnetic powder with a lubricant to obtain a powder compact, a heat treatment step of heating the resulting powder compact at 550° C. or more but not more than 650° C. in an inert atmosphere, and a heat treatment step of heating the heat-treated powder compact at 420° C. or more but not more than 530° C. in an oxidizing atmosphere.
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申请公布号 |
US2012154083(A1) |
申请公布日期 |
2012.06.21 |
申请号 |
US201113302103 |
申请日期 |
2011.11.22 |
申请人 |
OHWAKI TAKESHI;MITANI HIROYUKI;HOJO HIROFUMI;KAMIJO TOMOTSUNA;KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) |
发明人 |
OHWAKI TAKESHI;MITANI HIROYUKI;HOJO HIROFUMI;KAMIJO TOMOTSUNA |
分类号 |
H01F3/08;B22F3/12;B22F3/24 |
主分类号 |
H01F3/08 |
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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