新型高性能铁基超微晶软磁合金

New Ultrafine Crystalline Fe-base Soft Magnetic Alloy with Superior Propeties

本文研究了Ｆｅ７３．５Ｎｂ３Ｃｕ１Ｓｉ１３．５Ｂ９新型高性能铁基超微晶软磁合金的性能与结构特征。结果表明，该合金的最佳退火温度为５３５℃，其起始磁导率μ（０．０８Ａ／ｍ）＝１４．８×１０＾４，矫顽力Ｈｃ＝０．６Ａ／ｍ，饱和磁感Ｂ（８００Ａ／ｍ）＝１＼２２Ｔ。最佳铁损分另为Ｐ５／１０ｋ＝５．６Ｗ／ｋｇ，Ｐ５／２０ｋ＝１７．４Ｗ／ｋｇ，Ｐ５／５０ｋ＝８０Ｗ／ｋｇ，Ｐ５／１００ｋ＝２７０Ｗ／ｋｇ。

The properties and microstructure of Fe73.5Nb3Cu1Si13.5B9 new ultrafine crystalline soft magnetic alloy have been investigated .The results have been shown that the alloy is combined with high relative initial permeability of μ(0.08A· m)= 14.8 × 104. low coercivity of Hc = 0.6A / m. high saturation magnetic flux density of B800A ·m, = 1.22 T under the optimum performance with annealing at 535C , the optimum values of core loss have reached P5 ·10k = 5.6W / kg, P5 ·20k= 17.4W / kg, P5· 50k = 80W / kg. P5· 100k = 270W / kg. The alloy has high effective permeability μ'1 in a considerable wide frequency range. The microstructural analysis under X-ray diffraction was detemined that the main crystalline phase in the alloy is zFe-Si solid solution which has ultrafine grain size of d= 1 1nm. lattice parameter of a a0 = 0.2 837nm.