Fe-based nanocrystalline soft magnetic alloy with strong amorphous forming ability and preparing method of Fe-based nanocrystalline soft magnetic alloy

Abstract

The invention discloses a Fe-based nanocrystalline soft magnetic alloy with strong amorphous forming ability and a preparing method of the Fe-based nanocrystalline soft magnetic alloy. The alloy has an expression of Fe<x>SiBP<c>Nb<d>Cu<e>, wherein in the expression, each of the x, the a, the b, the c, the d and the e shows the atomic percentage content of the corresponding ingredient, and meets the following conditions that the a is greater than or equal to 0.5 but smaller than or equal to 12; the b is greater than or equal to 0.5 but is smaller than or equal to 15; the c is greater than or equal to 0.5 but smaller than or equal to 12; the d is greater than or equal to 0.1 but smaller than or equal to 3; the e is greater than or equal to 0.1 but smaller than or equal to 3; the x is greater than or equal 70 but smaller than or equal to 85; and the sum of the x, the a, the b, the c, the d and the e is 100 percent. The soft magnetic alloy has the advantages that an ordinary copper mold casting method can be used for preparing a Fe-based amorphous alloy with the critical dimension being 3.5mm; after the annealing; the saturation flux density is greater than 1.5T; and the coercive force value is smaller than 1A / m.

Description

technical field [0001] The invention relates to the field of magnetic functional materials, in particular to an iron-based nanocrystalline soft magnetic alloy with strong amorphous forming ability and a preparation method thereof. The alloy has strong amorphous forming ability, high thermal stability and excellent soft magnetic performance. Background technique [0002] Fe nanocrystalline alloy has the advantages of high resistivity, low loss, high strength and toughness, high magnetic permeability, and high saturation magnetization. At the same time, the preparation process is short, and the product is energy-saving and environmentally friendly. Therefore, it is considered to be the core of switching power supply and pulse transformer. , Ideal materials for power and electronic equipment such as transformers, magnetic amplifiers, spike suppressors, differential mode inductor cores and reactor cores. [0003] However, compared with commercial silicon steel sheets, the satura...

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Problems solved by technology

However, the amorphous formation ability of this component is very poor, and high-density nanocrystalline nuclei are produced during the preparation process. The subsequent crystallization heat treatment must be rapidly annealed to obtain a nano-double phase structure with excellent performance. Therefore, the annealing process of this component is difficult to control and difficult to industrialize. Production

[0009] In summary, nanocrystalline soft magnetic alloys with high saturation magnetic induction developed on the market currently require very high critical cooling rates (>10 6 ℃ / s), and even the microcrystallization of the amorphous precursor, which is extremely demanding on the production equipment, technology and heat treatment process, brings great difficulty to the production and preparation of nanocrystals, and limits the application fields of nanocrystals

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