| 摘要 |
PROBLEM TO BE SOLVED: To provide iron based powder for a powder magnetic core having excellent warm compressibility and excellent soft magnetic properties. SOLUTION: The iron based powder has a composition comprising 1.5 to 6% Cr and 2 to 7% Si, and the balance Fe with inevitable impurities. Regarding the inevitable impurities, the total content of C, N and O is preferably controlled to≤0.15%. Using the iron based powder as raw material powder, an insulating agent is added to the raw material powder, stirring and mixing are performed, and thereafter, the mixture is compacted, so as to be a powder magnetic core with a prescribed shape. After the compacting, heat treatment may be performed. In this way, its compressibility is made high, thus, even if the high Si-containing iron based powder is used as the raw material powder, compacting is possible, and the powder magnetic core having high green density, further having high specific resistance, having low core loss in a high frequency region, and also having excellent corrosion resistance can be obtained. COPYRIGHT: (C)2006,JPO&NCIPI
|
