引言 高导磁合金的磁性多年来受到原材料限制,尤其纯铁最为明显。其含氧量和含铝量变化甚大,氧含量在0.0058～0.016％,铝含量在0.01～0.31％,符合使用标准的氧小于0.005％、铝小于0.05％极少。由于使用过高的氧和铝含量的纯铁,造成真空熔炼时形成较多的高熔点Al_2O_3夹杂物。细小的氧 INTRODUCTION The magnetism of high permeability magnetic alloys has been limited by raw materials for many years, especially the pure iron. The oxygen content and aluminum content vary greatly, the oxygen content of 0.0058 ~ 0.016%, aluminum content of 0.01 ~ 0.31%, in line with the use of standard oxygen is less than 0.005%, aluminum is less than 0.05% very few. As the use of high oxygen and aluminum content of pure iron, resulting in the formation of more high-melting vacuum melting Al 2 O 3 inclusions. Small oxygen