用差热分析、 X射线衍射、冲击法等方法研究了铁基非晶 Fe72 .5Cu1 Nb2 V2 Si1 3 .5 B9合金及其经不同温度退火处理后材料的结构和磁性。结果表明 ,合金经 35 0℃退火 ,结构短程有序范围扩大 ,材料磁化比非晶合金容易 ;经 5 2 0～5 6 0℃退火 ,α- Fe(Si)晶粒析出 ,得到微晶结构并具有优良的软磁性能 ,例如相对初始磁导率 μi≥ 4.7× 10 4,矫顽力 Hc≤ 1.4A/ m;在 6 2 0℃以上退火 ,第二相 Fex By析出 ,材料磁化困难 ,软磁性能恶化 The structure and magnetic properties of the Fe-based amorphous Fe72 .5Cu1Nb2V2Si1 3 .5B9 alloy and its annealed materials at different temperatures were studied by means of differential thermal analysis, X-ray diffraction and impact test. The results show that the microstructure of the alloy is easier to be magnetized than that of the amorphous alloy after annealed at 35 ℃, and the order of the structure is broadened. The microstructure of α-Fe (Si) crystal is obtained by annealing at 520 ℃ ~ 600 ℃. And has excellent soft magnetic properties, such as the relative initial permeability μi ≥ 4.7 × 10 4, the coercive force Hc ≤ 1.4A / m; annealed above 620 ℃, the second phase Fex By precipitation, the material magnetization difficult, Soft magnetic properties deteriorate