在复合结构坩埚（外层石墨坩埚，内层氧化镁坩埚）中，利用真空感应熔炼法制备了坡莫合金，研究了配方和制备工艺对坡莫合金软磁性能的影响．结果表明，同一熔炼工艺， Fe19.8Ni80.2软磁性能最佳；熔化起始阶段合金的边缘位置比内部中央位置软磁性能好，精炼阶段则相反；随着熔炼时间的增加，同一位置的坡莫合金结构越来越均匀，软磁性能越来越好，最后趋于不变．%Permalloy is prepared by vacuum induction melting method (VIM ) using composited structure crucible(The outer layer is a graphite crucible ,and the inner layer is a magnesium oxide crucible) . The soft magnetic properties of the prepared permalloy is studied . The results show that the soft magnetic properties of Fe19.8 Ni80.2 are the best . The softness of permalloy of the edge position is better than internal central location during the initial stage of melting . T he conclusion is opposite during refining stage . With the increase of melting time , the structure of the same position permalloy is more and more uniform , therefore , softness is better and better . Finally , it achieves a constant value .
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