本发明属于非晶软磁材料技术领域，尤其涉及一种铁钴基非晶软磁合金及其制备方法。本发明提供的铁钴基非晶软磁合金的化学组成为Fe_aCo_bSi_cB_dCu_e，本发明提供的铁钴基非晶软磁合金同时具备高饱和磁感应强度、优异软磁性能和较好的非晶形成能力；实施例表明，本发明的铁钴基非晶软磁合金的饱和磁感应强度为1.79～1.86T，矫顽力为1.4～4.3A/m，磁导率为8000～14000；本发明的处理工艺简单，退火温度较低，大大降低了加工成本、节约能源，具有良好的应用前景。

The invention belongs to the technical field of amorphous soft magnetic materials, and particularly relates to an iron-cobalt-based amorphous soft magnetic alloy and a preparation method thereof. The chemical composition of the iron-cobalt-based amorphous soft magnetic alloy provided by the present invention is Fe_aCo_bSi_cB_dCu_e, and the iron-cobalt-based amorphous soft magnetic alloy provided by the present invention has high saturation magnetic induction, excellent soft magnetic properties and good amorphous forming ability; The examples show that the iron-cobalt-based amorphous soft magnetic alloy of the present invention has a saturation magnetic induction intensity of 1.79 to 1.86 T, a coercive force of 1.4 to 4.3 A/m, and a magnetic permeability of 8000 to 14000; the treatment process of the present invention is simple .The annealing temperature is lower, which greatly reduces the processing cost, saves energy, and has a good application prospect.