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Nanocrystal magnetically-soft alloy with low magnetic conductivity and preparation method of nanocrystal magnetically-soft alloy

A technology of nanocrystalline soft magnetism and low magnetic permeability, which is applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve problems such as patent publications that have not yet been found, and achieve increased DC resistance and stability, improved pass rate, The effect of reducing residual magnetism

Active Publication Date: 2014-12-10
曼特(广州)磁性器件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Through the search, no patent publications related to the patent application of the present invention have been found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A low magnetic permeability nanocrystalline soft magnetic alloy, its composition and parts by weight are as follows:

[0024] Fe60-70 parts; Ni1-5 parts; Si5-10 parts; B5-10 parts; Nb5-10 parts; Cu0.7-1.3 parts; Al1-2 parts; Co0.1-1.7 parts.

[0025] The preparation method of the above-mentioned low magnetic permeability nanocrystalline soft magnetic alloy, the steps are as follows:

[0026] ⑴Accurate ingredients according to the formula, put the prepared materials into the intermediate frequency vacuum induction furnace and undergo vacuum melting (melting temperature reaches 1300-1500 ℃, melting time should be guaranteed for 2-4 hours, vacuum degree 1-0.2Pa) to form alloy solution, Pour the alloy solution into a rotating pouring pan with a cooling device (to ensure that the circulating water pressure is 0.1-0.2Mpa) to form an alloy ingot;

[0027] ⑵Put the alloy ingot into the medium frequency induction crucible on the spray belt equipment and then conduct secondary m...

Embodiment 2

[0030] A low magnetic permeability nanocrystalline soft magnetic alloy, its composition and parts by weight are as follows:

[0031] 60 parts of iron; 1 part of nickel; 5 parts of silicon; 5 parts of boron; 5 parts of niobium; 0.7 parts of copper; 1 part of aluminum; 0.1 part of cobalt.

[0032] The preparation method of the above-mentioned low magnetic permeability nanocrystalline soft magnetic alloy, the steps are as follows:

[0033] ⑴Accurate ingredients according to the formula, put the prepared materials into the intermediate frequency vacuum induction furnace for vacuum melting, the conditions of vacuum melting are melting temperature 1400-1600 ℃, melting time 2 hours, vacuum degree 1-0.2Pa, forming alloy solution, Pour the alloy solution into a rotating pouring pan with a cooling device to form an alloy ingot. The cooling device must ensure that the circulating water pressure is at 0.1-0.2Mpa;

[0034] ⑵Put the alloy ingot in step ⑴ into the intermediate frequency ind...

Embodiment 3

[0037] A low magnetic permeability nanocrystalline soft magnetic alloy, its composition and parts by weight are as follows:

[0038] 70 parts of iron; 5 parts of nickel; 10 parts of silicon; 10 parts of boron; 10 parts of niobium; 1.3 parts of copper; 2 parts of aluminum; 1.7 parts of cobalt.

[0039] The preparation method of the above-mentioned low magnetic permeability nanocrystalline soft magnetic alloy, the steps are as follows:

[0040] ⑴Accurate ingredients according to the formula, put the prepared materials into the intermediate frequency vacuum induction furnace for vacuum melting, the conditions of vacuum melting are that the melting temperature reaches 1600°C, the melting time is 4 hours, and the vacuum degree is 1-0.2Pa to form an alloy solution. The solution is poured into a rotating pouring pan with a cooling device to form an alloy ingot. The cooling device must ensure that the circulating water pressure is at 0.1-0.2Mpa;

[0041] ⑵Put the alloy ingot in step ...

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Abstract

The invention relates to a nanocrystal magnetically-soft alloy with low magnetic conductivity and a preparation method of the nanocrystal magnetically-soft alloy. The nanocrystal magnetically-soft alloy comprises the following components in parts by weight: 60-70 parts of iron, 1-5 parts of nickel, 5-10 parts of silicon, 5-10 parts of boron, 5-10 parts of niobium, 0.7-1.3 parts of copper, 1-2 parts of aluminum and 0.1-1.7 parts of cobalt. The magnetic conductivity of the nanocrystal magnetically-soft alloy disclosed by the invention is lower than 2000, the linearity of the magnetic conductivity is good, and the magnetic conductivity change rate within a linear section of the magnetic conductivity is smaller than 10%, so that the direct-current resistance and stability of the material are improved; the product percent of pass is increased, the original product percent of pass can be only up to about 30%, the existing product percent of pass can be up to more than 85%, and therefore, the product percent of pass is greatly increased; and due to the adoption of the alloy, the application range of an iron core is widened, and the structural designs of some products are better optimized.

Description

technical field [0001] The invention belongs to the technical field of functional materials and relates to magnetic materials, in particular to a low magnetic permeability nanocrystalline soft magnetic alloy and a preparation method thereof. Background technique [0002] Nanocrystalline soft magnetic materials have the characteristics of high saturation magnetic induction, high magnetic permeability, low loss and good temperature stability, which make them widely used. However, some special applications (such as DC superposition, or working in a large range of excitation magnetic field) require low magnetic permeability, otherwise the high magnetic permeability will cause the iron core to saturate and fail. The usual method is to suppress the magnetic permeability through an annealing process under a strong magnetic field, but its disadvantage is that the linearity of the magnetic permeability is poor and it is quite difficult to reduce the magnetic permeability to below 200...

Claims

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Application Information

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IPC IPC(8): C22C38/16H01F1/147
Inventor 安海路
Owner 曼特(广州)磁性器件有限公司
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