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Iron-based nano-crystalline soft magnetic alloy and method for manufacturing same

A technology of iron-based nanocrystals and soft magnetic alloys, which is applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of poor soft magnetic properties, large saturation hysteresis coefficient, etc., and achieve high saturation magnetic induction intensity and annealing temperature Guaranteed interval range and reduced technical requirements

Inactive Publication Date: 2014-01-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the soft magnetic properties of iron-based nanocrystalline thin strips are worse than those of cobalt-based amorphous alloy thin strips, especially the saturation hysteresis coefficient is large (>10 -6 )

Method used

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  • Iron-based nano-crystalline soft magnetic alloy and method for manufacturing same
  • Iron-based nano-crystalline soft magnetic alloy and method for manufacturing same

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Experimental program
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Embodiment 1

[0018] In this embodiment, the chemical formula of the iron-based nanocrystalline soft magnetic alloy is Fe 79.5 Si 12 B 4 Cu 1 V 2 Ce 1.5 ;

[0019] 1) Weigh Fe, B-Fe, Si-Fe, Cu, V, Ce with a purity greater than 99.9% according to the composition ratio requirements of each alloy;

[0020] 2) Put the raw materials prepared in step 1 into the electric arc furnace and vacuumize to 5×10 -3 Below Pa, first melt the oxygen-absorbing Ti block to exhaust the oxygen in the residual cavity, then repeatedly smelt each sample 4 to 5 times, and apply electromagnetic stirring during the smelting process to ensure that the components are evenly distributed. Then, break the smelted master alloy, clean it with distilled water and alcohol, then put it into a quartz glass tube, fix the quartz glass tube with the master alloy on the roller, and evacuate to 6×10 -3 Below Pa, fill with argon. The master alloy is heated to a high-temperature molten state by induction, and is sprayed onto a ...

Embodiment 2

[0023] In this embodiment, the chemical formula of the iron-based nanocrystalline soft magnetic alloy is Fe 77.5 Si 16 B 4 Cu 0.5 mn 1 Gd 1 ;

[0024] 1) Weigh Fe, B-Fe, Si-Fe, Cu, Mn, Gd with a purity greater than 99.9% according to the alloy composition ratio requirements;

[0025] 2) Same as step 2 of embodiment 1;

[0026] 3) Preparation of nanocrystalline soft magnetic alloy by amorphous crystallization annealing method: conduct crystallization annealing on the amorphous strip obtained by rapid quenching under the protection of Ar gas in a vacuum annealing furnace. The annealing temperature is 450°C, and the holding time is 50 minutes. Then cool to room temperature with the furnace.

Embodiment 3

[0028]In this embodiment, the chemical formula of the iron-based nanocrystalline soft magnetic alloy is Fe 76 Si 13 B 7 Cu 0.5 Cr 1.5 Tb 2 ;

[0029] 1) Weigh Fe, B-Fe, Si-Fe, Cu, Cr, Tb with a purity greater than 99.9% according to the alloy composition ratio requirements;

[0030] 2) Same as step 2 of embodiment 1;

[0031] 3) Preparation of nanocrystalline soft magnetic alloy by amorphous crystallization annealing method: conduct crystallization annealing on the amorphous strip obtained by rapid quenching under the protection of Ar gas in a vacuum annealing furnace. Then cool to room temperature with the furnace.

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Abstract

The invention provides iron-based nano-crystalline soft magnetic alloy, and belongs to the technical field of soft magnetic alloy. The iron-based nano-crystalline soft magnetic alloy is characterized in that a chemical formula of the iron-based nano-crystalline soft magnetic alloy is FeSiB<c>Cu<d>T<e>RE<f>, and the T represents at least one of Ti, V, Mn, Cr, Mo, Nb, Zr and W, and the RE represents one or two of La, Y, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho and Er; the a, the b, the c, the d, the e and the f represent atomic percentages of corresponding components, the b ranges from 12 to 16, the c ranges from 4 to 7, the d ranges from 0.5 to 1, the e ranges from 1 to 4, the f ranges from 0.5 to 2, and the a meets an equation of (100-b-c-d-e-f-g). The iron-based nano-crystalline soft magnetic alloy has the advantages that a saturated magnetostriction coefficient of the iron-based nano-crystalline soft magnetic alloy is close to zero, and the iron-based nano-crystalline soft magnetic alloy is high in magnetic permeability and saturated magnetic induction intensity, and can replace cobalt-based amorphous alloy to be applied to the field of manufacture for magnetic cores of precision electronic components.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic alloys, and in particular relates to an iron-based nanocrystalline soft magnetic alloy and a preparation method thereof. Background technique [0002] Scientific and technological progress has continuously increased the requirements for miniaturization, intelligence and system stability of power electronic equipment. In high-tech fields, especially aerospace, radar, and military power supplies, higher requirements are placed on the quality of precision electronic components, such as anti-electromagnetic interference, stress sensitivity, and service life. As the technological commanding heights of the electronic components industry - the precision electronic components industry, its production technology level represents the technological height of a country in the electronic components manufacturing industry. As the core component of some electronic components - magnetic core, its quality l...

Claims

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Application Information

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IPC IPC(8): H01F1/147C22C38/16C22C38/32C22C38/34C21D1/26C21D6/00
Inventor 王寅岗陈夫刚刘万里
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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