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Nanocrystal magnetically soft alloy with high processing property and high saturation magnetic induction strength, and preparation method therefor

A nanocrystalline soft magnetic and magnetic induction technology, applied in magnetic materials, magnetic objects, electrical components, etc., can solve the problems of low heating rate of nanocrystalline alloys, increase melting cost, etc., and achieve low coercivity, high practicability, good reliability

Inactive Publication Date: 2017-02-01
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the patent does not disclose that the nanocrystalline alloy can be obtained by heat treatment at a low heating rate, and the P element contained in the alloy also increases the melting cost

Method used

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  • Nanocrystal magnetically soft alloy with high processing property and high saturation magnetic induction strength, and preparation method therefor
  • Nanocrystal magnetically soft alloy with high processing property and high saturation magnetic induction strength, and preparation method therefor
  • Nanocrystal magnetically soft alloy with high processing property and high saturation magnetic induction strength, and preparation method therefor

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Experimental program
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Embodiment 1

[0029] Example 1Fe 81.3 B 13 Si 4 Cu 1.7

[0030] Step 1, using Fe, B, Si and Cu raw materials with a mass percentage greater than 99% to carry out weighing and batching according to the designed alloy composition;

[0031] Step 2. Prepare the master alloy ingot in a non-consumable electric arc furnace under an Ar gas atmosphere, and the alloy is repeatedly smelted 4 times to ensure that the composition of the master alloy ingot is uniform;

[0032] Step 3: crush the master alloy ingot and put it into a quartz tube, and use a single-roll strip stripping process at a speed of 30m / s to produce an amorphous alloy strip with a width of 2-3mm and a thickness of 20-25μm ;

[0033] Step 4: Heat treatment of multiple batches of amorphous alloy strips in a vacuum heat treatment furnace with different processes: in the temperature range of 365-425 ° C, every 15 ° C is used as a holding temperature, and the temperature is raised to 20 ° C / min. After each holding temperature, it w...

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Abstract

The invention discloses a nanocrystal magnetically soft alloy with high processing property and high saturation magnetic induction strength, and a preparation method therefor, and belongs to the technical field of a new material. The chemical formula of the nanocrystal magnetically soft alloy is FeBSi<c>Cu<d>C<e>M<f>Z<g>, wherein M is at least one kind of elements Co or Ni; Z is at least one kind of elements Al, Cr, Mn, Ti, Nb, Ta or Mo; a, b, c, d, e, f and g are atomic percentage contents of corresponding elements, and satisfy the formula as follows: a+f is greater than or equal to 80 and less than or equal to 84; b is greater than or equal to 10 and less than or equal to 15; c is greater than or equal to 0 and less than or equal to 6; d is greater than or equal to 1.6 and less than or equal to 2.2; e is greater than or equal to 0 and less than or equal to 2; f is greater than or equal to 0 and less than or equal to 5; and g is greater than or equal to 0 and less than or equal to 2. The alloy is formed by uniformly dispersing an <alpha>-Fe phase, which is obtained by heat treatment of amorphous stripes and has the crystal grain sizes of less than 50nm, into residual amorphous phase tissues, wherein the saturation magnetic induction strength is greater than 1.7T, and the coercivity is less than 15A / m. The alloy has no volatile phosphorus element; in addition, the heat treatment process is simple, and high temperature-rise rate is not required; the heat treatment temperature range and the thermal insulation time range are wide; industrial production can be realized easily; and the nanocrystal magnetically soft alloy and the preparation method therefor are convenient to popularize and use.

Description

technical field [0001] The invention relates to a nanocrystalline soft magnetic alloy with good process performance and high saturation magnetic induction and a preparation method thereof, belonging to the technical field of new materials. Background technique [0002] With the development of modern power and electronic equipment in the direction of energy saving, miniaturization, light weight and high efficiency, people put forward higher requirements for the soft magnetic properties of magnetic core / iron core materials in electromagnetic conversion devices such as transformers and motors. Since the last century, electrical steel (silicon steel) due to its saturation magnetic induction (B s ) up to 2.0T, has always been the first choice for the core material. But the coercive force of silicon steel (H c ) is high, the iron loss is large, and the energy consumption is high. In order to overcome the high H of silicon steel c And iron loss, people have developed Fe-based a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147C22C33/06B22D11/06C21D6/00
CPCH01F1/14791B22D11/0611C21D6/001C21D6/002C21D6/005C21D6/008C22C33/06
Inventor 张伟李艳辉贾行杰许永强
Owner DALIAN UNIV OF TECH
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