一种高饱和磁化强度Fe‑B‑P‑C‑Cu‑M系非晶纳米晶软磁合金及制备方法。具有如下所示的通式：Fe_xB_yP_zC_aCu_bM_c，式中x,y,x,a,b,c分别表示各对应组分Fe、B、P、C、Cu、M的原子百分比，并满足下列条件：80≤x≤85，4≤y≤10，2≤z≤10，3.5≤a≤7.5，0.7≤b≤1.5，0≤c≤2，其中x+y+z+a+b+c＝100，M为Nb，Zr，V，Hf，Mo等中的一种或多种。本发明所涉及的合金系中不含Si元素，以具有更小原子尺寸半径和更高非晶形成能力的C元素作为重要添加元素，开发了一系列具有高饱和磁化强度(B_s)和低矫顽力(H_c)的铁基非晶纳米晶软磁合金。本发明所开发的铁基非晶纳米晶合金可作为电机铁芯、互感器铁芯，同时，也可用于电力工业变压器铁芯、逆变焊机、新能源、无线充电、数码及自动化等领域。

A Fe-B-P-C-Cu-M series amorphous and nanocrystalline soft magnetic alloy with high saturation magnetization and a preparation method thereof. It has the following general formula: Fe_xB_yP_zC_aCu_bM_c, where x, y, x, a, b, and c respectively represent the atomic percentages of the corresponding components Fe, B, P, C, Cu, and M, and meet the following conditions: 80 ≤x≤85, 4≤y≤10, 2≤z≤10, 3.5≤a≤7.5, 0.7≤b≤1.5, 0≤c≤2, where x+y+z+a+b+c=100, M is one or more of Nb, Zr, V, Hf, Mo and the like. The alloy system involved in the present invention does not contain Si element, and uses C element with a smaller atomic size radius and higher amorphous forming ability as an important additive element. A series Fe-based amorphous nanocrystalline soft magnetic alloys of high saturation magnetization (B_s) and low coercivity (H_c) have been developed. The Fe-based amorphous nanocrystalline alloy developed by the present invention can be used as motor cores, transformer cores, and at the same time, it can also be used in power industry transformer cores, inverter welding machines, new energy, wireless charging, digital and automation and other fields .