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Iron-based nanocrystalline soft magnetic alloy with high saturation magnetic induction and low cost

An iron-based nanocrystal, magnetic induction technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of low coercivity, difficult to control alloy composition, high alloy processing cost, achieve high saturation magnetic induction, reduce Processing cost, the effect of easy promotion and application

Active Publication Date: 2014-02-12
NINGBO INNOVATION CENT FOR APPLIED MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, with the improvement of the accuracy, safety factor and production cost of these magnetic devices, traditional crystalline soft magnetic materials such as ferrite, silicon steel, permalloy, etc. have been unable to meet the requirements
[0012] The development and application of nanocrystalline soft magnetic materials have greatly promoted the development of the electronic power industry. However, judging from the current development of nanocrystalline soft magnetic materials, there are generally some defects such as the saturation magnetic induction intensity is not very high, especially the inability to Simultaneously achieve high saturation magnetic induction, low coercive force and low loss; in addition, the alloy system contains one or more noble metal elements such as Nb, Zr, Hf, Co, or contains volatile element P, the processing cost of the alloy High or alloy composition is difficult to control, thus limiting its industrial application

Method used

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  • Iron-based nanocrystalline soft magnetic alloy with high saturation magnetic induction and low cost
  • Iron-based nanocrystalline soft magnetic alloy with high saturation magnetic induction and low cost
  • Iron-based nanocrystalline soft magnetic alloy with high saturation magnetic induction and low cost

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preparation example Construction

[0043] In another embodiment of the present invention, the present invention provides a method for preparing an iron-based nanocrystalline soft magnetic alloy with high saturation magnetic flux density and low cost. The method includes the following steps:

[0044] (1) The Fe, B, C, M and Cu elements in the alloy composition are based on the alloy composition relationship Fe a B b C c M d Cu e Batching, where M is one or more of Si, Al, Cr, Mn, and the subscripts a, b, c, d, and e represent the atomic percentages of the corresponding alloy elements, and meet the following conditions: 78≤ a≤88; 4≤b≤16; 3≤c≤10; 0≤d≤8; 0.3≤e≤1.5; a+b+c+d+e=100;

[0045] (2) Smelting the alloy raw materials in a smelting device, thereby obtaining an alloy ingot;

[0046] (3) Crush the obtained alloy ingot;

[0047] (4) Put the crushed alloy ingot into a quartz tube with a nozzle at the bottom, and prepare a continuous amorphous alloy by a single-roll quenching method;

[0048] (5) Put the amorphous alloy i...

Embodiment 1

[0059] Preparation of Fe 83 B 10 C 6 Cu 1 Nanocrystalline alloy strips.

[0060] The specific preparation method is as follows:

[0061] Step 1: Combine the raw materials Fe, B, C and Cu with a purity greater than 99% according to the iron-based nanocrystalline alloy composition relation Fe 83 B 10 C 6 Cu 1 The batching is carried out, where C is added in the form of iron-carbon alloy, and the mass percentage of C in the iron-carbon alloy is 4.26%. ;

[0062] Step 2: Put the well-proportioned raw materials into the water-cooled copper crucible of the arc smelting furnace and vacuumize to 5.0×10 -3 Pa, then fill with argon gas to a pressure of 600mbar for smelting, continue smelting for 2 minutes after melting, then let the alloy cool to solidification with the copper crucible, quickly turn it over, repeat smelting 5 times to obtain an alloy ingot with uniform composition;

[0063] Step 3: The alloy ingot obtained in step 2 is crushed and put into a quartz tube with a nozzle at the bot...

Embodiment 2

[0069] Preparation of Fe 82.7 B 10 C 6 Cu 1.3 Nanocrystalline alloy strips.

[0070] The specific preparation method is as follows:

[0071] Step 1: Combine the raw materials Fe, B, C and Cu with a purity greater than 99% according to the iron-based nanocrystalline alloy composition relation Fe 82.7 B 10 C 6 Cu 1.3 Batching, where C is added in the form of iron-carbon alloy, and the mass percentage of C in the iron-carbon alloy is 4.26%;

[0072] Step 2: Put the well-proportioned raw materials into the water-cooled copper crucible of the arc smelting furnace and vacuumize to 5.0×10 -3 Pa, then fill with argon gas to a pressure of 600mbar for smelting, continue smelting for 2 minutes after melting, then let the alloy cool to solidification with the copper crucible, quickly turn it over, repeat smelting 5 times to obtain an alloy ingot with uniform composition;

[0073] Step 3: The alloy ingot obtained in step 2 is crushed and put into a quartz tube with a nozzle at the bottom. The singl...

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Abstract

The invention relates to an iron-based nanocrystalline soft magnetic alloy. The alloy is characterized in that: the alloy meets the following relation in composition: FeaBbCcMdCue, wherein M represents one or more of Si, Al, Cr and Mn, the subscripts a, b, c, d and e represent the atom percents of the corresponding elements of the alloy respectively and meet the following conditions: 78<=a<=88, 4<=b<=16, 3<=c<=10, 0<=d<=8, 0.3<=e<=1.5 and a+b+c+d+e=100. The iron-based nanocrystalline alloy consists of an amorphous matrix phase and a nanocrystalline phase. The alloy is obviously characterized in that: the alloy has excellent soft magnetic performances such as high saturation magnetic induction, low coercivity, low loss and the like; and the alloy does not contain precious metal elements and volatile elements, thereby reducing the processing cost of the raw materials and bringing convenience to popularization and application. The invention also relates to a preparation method of the alloy.

Description

Technical field [0001] The invention relates to an iron-based nanocrystalline soft magnetic alloy with high saturation magnetic induction intensity and low cost. The invention also relates to a preparation method of the iron-based nanocrystalline soft magnetic alloy. Background technique [0002] Magnetic materials have the functions of energy and information conversion, transmission, storage or changing the state of energy and information, and are important functional materials. They are widely used in machinery, electronics, electricity, communications, instrumentation and other fields. Among them, the magnetic material with low coercivity and high permeability is called soft magnetic material, which is a type of magnetic material widely used in electric power, electrical machinery and electronics industries. Considering that most of the equipment made of soft magnetic materials works under alternating magnetic field conditions, it is usually required to be small in size, high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/16C22C1/02H01F1/147
Inventor 沈宝龙范星都
Owner NINGBO INNOVATION CENT FOR APPLIED MAGNETICS CO LTD