Fe-based amorphous or nanocrystalline soft magnetic alloy and preparation method thereof

A nanocrystalline alloy and nanocrystalline soft magnetic technology, which is applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of no obvious improvement in soft magnetic properties, high price, and reduced saturation magnetic induction of Fe-Si-B alloys. , to achieve the effect of improving comprehensive soft magnetic properties, reducing raw material costs, and optimizing comprehensive soft magnetic properties

Inactive Publication Date: 2010-02-17
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price of Nb, and the addition of Nb significantly reduces the saturation magnetic induction B of the Fe-Si-B alloy. s , other refractory transition metals, such as V, Mo, W, Ta, etc., can replace Nb, although the purpose of grain refinement can be achieved, but the soft magnetic properties have not been significantly improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Raw materials such as industrial pure iron, pure copper, pure niobium, pure silicon, ferroboron, and ferrophosphorus with a purity of not less than 99.9% (mass percentage) are classified as Fe 73.5 Si 13.5 B 9 Cu 1 Nb 3-x m x (x = 0.5 ~ 1.5) ingredient distribution is about 60g;

[0018] (2) Put the cleaned raw materials into a WS-4 non-consumable vacuum arc melting furnace, and prepare a master alloy ingot with uniform composition through electric arc furnace melting;

[0019] (3) The ingot is crushed, put into a quartz test tube, and a thin strip of amorphous alloy with a width of about 3 mm and a thickness of about 30 μm is prepared by a single-roller stripping method;

[0020] (4) Using SK2-4-10 tubular annealing furnace, under the protection of Ar gas, the amorphous strip is isothermally annealed at 530°C-560°C for one hour, and then cooled under the protection of Ar gas.

[0021] The Fe prepared by the above method 73.5 Si 13.5 B 9 Cu 1 Nb 3-x m x ...

Embodiment 2

[0023] (1) The raw materials of industrial pure iron, pure copper, pure niobium, pure silicon, ferroboron and ferrophosphorus with a purity of not less than 99.9% (mass percentage) are classified as Fe 73.5 Si 13.5 Cu 1 B 9-x Nb 3-y m x+y (x=0.5~1.5, y=0.5~1.5) The ingredient distribution is about 60g;

[0024] (2) Put the cleaned raw materials into a WS-4 non-consumable vacuum arc melting furnace, and prepare a master alloy ingot with uniform composition through arc melting;

[0025] (3) The ingot is broken, put into a quartz test tube, and a thin strip of amorphous alloy with a width of 3 mm and a thickness of about 30 μm is prepared by a single-roller stripping method;

[0026] (4) Using the SK2-4-10 tubular annealing furnace, under the protection of Ar gas, anneal the amorphous strip at 520°C to 550°C for one hour, and then take it out of the furnace to cool under the protection of Ar gas.

[0027] The Fe prepared by the above method 73.5 Si 13.5 Cu 1 B 9-x Nb 3...

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Abstract

The invention discloses a Fe-based amorphous or nanocrystalline soft magnetic alloy, aiming to favorable performance and low cost. Alloy components can be expressed as FeaSibBcCudNbeMf, wherein M is Al, Ni or P; a, b, c, d, e and f are atom percentages, and the change range is as follows: a is more than or equal to 65 and less than or equal to 85, b is more than or equal to 5 and less than or equal to 20, c is more than or equal to 5 and less than or equal to 25, d is more than or equal to 0 and less than or equal to 5, e is more than or equal to 0 and less than or equal to 5, and f is more than or equal to 0.1 and less than or equal to 10; and a+b+c+d+e+f=100. The preparation method comprises the following steps: placing raw materials of pure ferrum, pure copper, and the like into a vacuum electric arc furnace to smelt to obtain an alloy ingot; crushing, placing into a quartz test tube, and preparing an amorphous alloy ribbon by using a single-rolling ribbon throwing method; placing into a tubular annealing furnace, adjusting the temperature to 510-580 DEG C, isothermally annealing under the protection of Ar gas and getting out of the furnace to cool; and obtaining amorphous alloys with different microstructures or nanocrystalline alloys with nanometer crystal particles evenly arranged on an amorphous matrix through controlling alloy cooling speed and heat treatment temperature as well as time.

Description

technical field [0001] The invention relates to an iron-based amorphous or nanocrystalline soft magnetic alloy material and a preparation method thereof. Background technique [0002] In 1988, Yoshizawa and others from Hitachi Metals, Japan discovered a new type of iron-based soft magnetic alloy "FINEMET", whose typical composition is Fe 73.5 Si 13.5 B 9 Cu 1 Nb 3 (Journal of Applied Physics 1988, 64:6044-6046). The biggest feature of this soft magnetic alloy is that it has low loss, high magnetic permeability and close to zero magnetostriction coefficient comparable to cobalt-based amorphous alloys. At the same time, its saturation magnetic induction intensity B s It surpasses other soft magnetic materials of the same kind, reaching about 1.2T. The soft magnetic alloy is obtained by adding a small amount of Cu and Nb on the basis of the traditional Fe-Si-B amorphous alloy through annealing treatment. In the crystalline matrix, the so-called "nanocrystalline" structur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147C22C45/02C22C38/16C22C33/04B22D11/06C21D1/26C21D1/74
Inventor 闫志杰张罡党淑娥夏兰廷
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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