一种高铁含量Fe‑Si‑B‑P‑Cu‑Nb系非晶纳米晶合金及制备方法。其化学成分表达式为Fe_aSi_bB_cP_dCu_eNb_f，式中a,b,c,d,e,f分别表示各对应组分Fe、Si、B、P、Cu、Nb的原子百分比，并满足下列条件：85.5≤a≤86.5,1≤b≤2,8≤c≤9.8,2.6≤d≤4,0≤e≤1,0≤f≤0.55，a+b+c+d+e+f＝100。该合金成本低廉，利用现有的单辊旋淬技术可以制备淬态纳米晶化和淬态非晶态的软磁薄带，Cu和Nb元素的少量添加提升了合金的非晶形成能力、韧性、饱和磁化强度并细化了纳米晶晶粒尺寸。其中，本发明合金中淬态纳米晶薄带的饱和磁化强度达到1.82T。非晶薄带经过晶化退火后的纳米晶薄带的饱和磁化强度达到了1.84T。所制备的非晶纳米晶合金作为电机、互感器等器件适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。

Fe-Si-B-P-Cu-Nb amorphous and nanocrystalline alloy with high iron content and a preparation method thereof. Its chemical composition expression is Fe_aSi_bB_cP_dCu_eNb_f, where a, b, c, d, e, f represent the atomic percentage of each corresponding component Fe, Si, B, P, Cu, Nb, and meet the following conditions: 85.5≤a ≤86.5, 1≤b≤2, 8≤c≤9.8, 2.6≤d≤4, 0≤e≤1,0≤f≤0.55, a+b+c+d+e+f=100. The alloy is low in cost, and the existing single-roll spin-quenching technology can be used to prepare quenched nanocrystalline and quenched amorphous soft magnetic ribbons. The small addition of Cu and Nb elements improves the amorphous forming ability, toughness of the alloy, saturation magnetization and refines the nanocrystalline grain size. Among them, the saturation magnetization of the quenched nanocrystalline ribbon in the alloy of the present invention reaches 1.82T. The saturation magnetization of the nanocrystalline thin ribbon after the crystallization annealing of the amorphous thin ribbon reaches 1.84T. The prepared amorphous nanocrystalline alloy is suitable for electric power industry transformer cores, inverter welding machines, new energy, wireless charging, digital and automation fields as motors, transformers and other devices.