| 摘要 |
PURPOSE:To manufacture the iron-base soft magnetic steel having high direct current magnetization characteristics by preparing an iron-base soft magnetic steel contg. specified ratios of Al, Si, C+N, Mn and oxygen and having specified ferrite grain size, magnetic flux density value and coercive force. CONSTITUTION:An iron-base soft magnetic steel constituted of, by weight, 0.5 to 2.5% Al, <=1.0% Si, <=0.007% C+N, <=0.5% Mn, <=0.005% oxygen and the balance Fe with inevitable impurities, having >=0.5mm ferrite grain size and, in the state where lattice strains are sufficiently removed, showing >=11000G magnetic flux density value in 0.5Oe and >=15500G magnetic flux density value in 25Oe as well as <=0.4Oe coercive force is prepd. In this way, the soft magnetic steel having excellent direct current magnetization characteristics and is easily magnetized even in an extremely weak magnetic fieta can be obtd., which is useful, e.g. as high function core materials and high function magnetic shielding materials. |
