| 摘要 |
A method includes a step of compacting an insulation-coated pure iron powder or an iron-based alloy powder mainly containing iron using a die to obtain a dust core, a step of heat-treating the obtained dust core, and a step of post-machining at least one portion of the heat-treated dust core using a grinding wheel. In the post-machining step, grinding is performed in such a manner that the dust core and the grinding wheel are rotated, whereby isotropic machining marks are formed on a machined surface of the dust core. |
