Iron-based nanocrystalline soft magnetic alloy with high quenching state toughness and wide annealing temperature range

Abstract

The invention relates to an iron-based nanocrystalline soft magnetic alloy with high quenching state toughness and a wide annealing temperature range, which belong to the field of preparation of soft magnetic alloys in functional materials. The chemical formula of the alloy is FegZraNbbPcBdCueXf, wherein a, b, c, d, e, f and g refer to atomic percentage; a is equal to 1-5; b is equal to 1-5; c isequal to 2-4; d is equal to 4-9; e is equal to 0.5-1.5; f is equal to 0.5-2; g is equal to (100-a-b-c-d-e-f); and X is Al and / or Sn. A preparation process comprises the following steps of: firstly, smelting components into a uniform master alloy; secondly, heating the master alloy to high-temperature molten state, spraying the molten master alloy onto a copper roller through a spray nozzle, and cooling quickly to obtain an amorphous thin strip; and lastly, crystallizing and annealing the quenched-state amorphous thin strip at certain temperature to obtain the nanocrystalline soft magnetic alloy. The iron-based nanocrystalline soft magnetic alloy has excellent quenching state toughness and a wide annealing temperature range, and the rejection rates of technical processes such as quick quenching, iron core winding and the like can be effectively lowered. The alloy can be applied to the fields of power transformers, mutual inductors and the like instead of the conventional silicon-steel sheets and iron-based amorphous and nanocrystalline soft magnetic alloys.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic alloys in functional materials, and in particular relates to an iron-based nanocrystalline soft magnetic alloy with high quenched toughness and wide annealing temperature range. Background technique [0002] Iron-based amorphous and nanocrystalline soft magnetic alloys are considered to be ideal materials for power transformers instead of silicon steel sheets due to their lower loss. Since the 1980s and 1990s, Fe-P-C, Fe-B-C, Fe-B-Si, Fe-B-Si-C, Fe-Cu-M-Si-B (M=Nb, Cr, V, Mo, Zr, W), Fe-M-B (M=Nb, Hf, Zr), (Fe, Co)-M-B-Cu (M=Nb, Hf, Zr) and a series of iron-based amorphous, Nanocrystalline soft magnetic alloys. At present, the thin strips of amorphous soft magnetic alloys in industrial production are generally prepared by the single-roll spin quenching method (spinning strip method), and then prepared into amorphous iron cores after winding or lamination, and finally annealed at low temper...

AI Technical Summary

Problems solved by technology

However, the brittleness of amorphous has been plagued by amorphous alloy manufacturers

If the amorphous alloy is brittle, it is difficult to form a continuous strip during the stripping process, reducing production efficiency and increasing the cost of the alloy; brittle fracture will occur during the winding process, increasing the scrap rate; fragments may be generated during use , the noise becomes larger, the loss increases and so on a series of problems

Also, as transformers become more powerful, cores become larger and more complex

When preparing nanocrystalline soft magnetic alloys by crystallization annealing, due to the influence of factors such as large iron core size, complex iron core shape, and uneven temperature distribution in the annealing furnace, there may be over-annealed and insufficiently annealed parts on the iron core.

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