Iron-based nanocrystalline alloy and preparation method thereof

An iron-based nanocrystalline and amorphous alloy technology, which is applied in the field of nanocrystalline alloys, can solve the problems of low Nb content, refined grains, and difficulty in winding and forming of thin strips. The effect of improving implementability

Inactive Publication Date: 2012-11-14
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the atomic percentage content of P element ≥ 3% increases the brittleness of the amorphous strip, m

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An iron-based nanocrystalline alloy and a preparation method thereof. The chemical composition and content of the alloy are: Fe is 83.5~84.5wt%; Si is 7~8wt%; B is 1.6~2.0wt%; Cu is 1.2~1.4wt%; P is 0.1~

[0027] 0.3wt%; Nb is 2.5~3wt%; V is 1~2wt%.

[0028] The preparation method of the alloy is as follows: according to the above chemical composition and its content, it is melted in an induction heating furnace, and then the molten alloy is sprayed onto a high-speed rotating copper roller to make an amorphous alloy strip; The thin strip of amorphous alloy was placed in a vacuum furnace for crystallization and annealing to obtain an iron-based nanocrystalline alloy.

[0029] The iron-based nanocrystalline alloy prepared in this embodiment is detected and analyzed by an inductance measuring instrument: when the operating frequency is 1KHz, the effective magnetic permeability μ e >1.26×10 4 Gs / Oe; when the working frequency is 1KHz~100KHz, μ e 100KHz / μ e 1KHz >50%....

Embodiment 2

[0031] An iron-based nanocrystalline alloy and a preparation method thereof. The chemical composition and content of the alloy are: Fe is 83.5~84.5wt%; Si is 7.5~9wt%; B is 1.9~2.1wt%; Cu is 1.3~1.5wt%; P is 0.4~0.7wt%; V is 2.7~4wt%; V is 1~2wt%.

[0032] The preparation method of this embodiment is the same as that of Example 1.

[0033] The iron-based nanocrystalline alloy prepared in this embodiment is detected and analyzed by an inductance measuring instrument: when the operating frequency is 1KHz, the effective magnetic permeability μ e >3.83×10 4 Gs / Oe; when the working frequency is 1KHz~100KHz, μ e 100KHz / μ e 1KHz ﹥16.7%.

Embodiment 3

[0035] An iron-based nanocrystalline alloy and a preparation method thereof. The chemical composition and content of the alloy are: Fe is 84~85.5wt%; Si is 8~9wt%; B is 1.4~1.6wt%; Cu is 1.3~1.5wt%; P is 0.1~0.4wt%; V is 2.5~3wt%; V is 1~2wt%.

[0036] The preparation method of this embodiment is the same as that of Example 1.

[0037] The iron-based nanocrystalline alloy prepared in this embodiment is detected and analyzed by an inductance measuring instrument: when the operating frequency is 1KHz, the effective magnetic permeability μ e >2.01×10 4 Gs / Oe; when the working frequency is 1KHz~100KHz, μ e 100KHz / μ e 1KHz >60%.

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Abstract

The invention relates to an iron-based nanocrystalline alloy and a preparation method thereof. The alloy comprises the following chemical compositions as well as contents of the compositions: 83.5-85.5wt% of Fe, 7-9wt% of Si, 1.4-2.1wt% of B, 1.2-1.5wt% of Cu, 0.1-0.7wt% of P, 2.5-4wt% of Nb and 1-2wt% of V. Preparation is carried out according to the chemical compositions and contents of the compositions, an induction heating furnace is adopted for smelting, molten alloy is then sprayed on to a copper roller which rotates at a high speed, so that an amorphous alloy strip is produced; and then, the produced amorphous alloy strip is put in a vacuum furnace to be subjected to crystallization annealing, so that the iron-based nanocrystalline alloy is produced. The crystallization annealing technology comprises the following steps of: pre-annealing at 450-480 DEG C for 40-60 minutes, crystallization annealing at 520-570 DEG C for 40-60 minutes, discharging from the furnace, and naturally cooling to be at the room temperature. The iron-based nanocrystalline alloy has the characteristics of low alloy cost, good molten steel liquidity and strong industrial implementation performance, and the produced an iron-based nanocrystalline alloy strip has good glossiness, good amorphous alloy strip tenacity, relatively fine and dispersed nano crystal grains and relatively small effective magnetic permeability variation caused by frequency change.

Description

Technical field [0001] The present invention belongs to the field of nanocrystalline alloy technology, which is specifically an iron -based nano -crystal alloy and its preparation method. Background technique [0002] In 1988, Japan Yoshizawa et al. Reported a new type of iron-based amorphous alloy "FINEMET" in J. Appl. PHYS, 1988, 64: 6044-6046. 73.5 SI 13.5 B 9 CU 1 NB 3 EssenceThe amorphous alloy is a small amount of CU and NB on the basis of the traditional FE-SI-B amorphous alloy. It obtains an amorphous / nanocrystalline dual-phase coupling structure by crystallizing annealing.The size is 10 ~ 15nm, and the volume score is about 70%. [0003] Hono et al. 73.5 SI 13.5 B 9 CU 1 NB 3 Nanocrystalline Soft Magnetic Material [J]. Acta Mater, 1992, 40 (9): 2137 ~ 2147.), during the process of crystallization, due to the small solution of CU in the Fe, it is with the FEAfter the separation, the rich CU cluster is formed. The surrounding FE and SI components of the rich Cu cluster inc...

Claims

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Application Information

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IPC IPC(8): C22C38/16C21D1/26C21D1/773
Inventor 甘章华王贞刘静徐黎明陈汉杰
Owner WUHAN UNIV OF SCI & TECH
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