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

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 low coercive force, difficult control of alloy composition, high alloy processing costs, etc., and achieve high saturation magnetic induction intensity, The effect of reducing processing costs and facilitating popularization and application

Active Publication Date: 2012-01-04
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 a high saturation magnetic induction low-cost iron-based nanocrystalline soft magnetic alloy, the method comprising the following steps:

[0044] (1) The Fe, B, C, M and Cu elements in the alloy composition are calculated according to the alloy composition relationship Fe a B b C c m d Cu e For batching, in the formula, M is one or more of Si, Al, Cr, and Mn, and the subscripts a, b, c, d, and e respectively represent the atomic percentages of the corresponding alloy elements, and satisfy 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) placing the alloy raw material in a smelting device for smelting, thereby obtaining an alloy ingot;

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

[0047] (4) Pack the broken alloy ingot into a quartz tube with a nozzle at the bottom, and prepare a continuous amorphous alloy by a s...

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: raw materials Fe, B, C and Cu with a purity greater than 99% are composed according to the iron-based nanocrystalline alloy composition relational formula Fe of the present invention 83 B 10 C 6 Cu 1 The batching is carried out, wherein 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 melting furnace, and evacuate to 5.0×10 -3 Pa, and then filled with argon to a pressure of 600mbar for smelting, and then continued smelting for 2 minutes after melting, then let the alloy cool with the copper crucible until it solidified, then quickly turned it over, repeated smelting 5 times, and obtained an alloy ingot with uniform composition;

[0063] Step 3: Break the alloy...

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: raw materials Fe, B, C and Cu with a purity greater than 99% are composed according to the iron-based nanocrystalline alloy composition relational formula Fe of the present invention 82.7 B 10 C 6 Cu 1.3 Carry out batching, wherein C is added in the form of iron-carbon alloy, and the mass percentage of C in this iron-carbon alloy is 4.26%;

[0072] Step 2: Put the well-proportioned raw materials into the water-cooled copper crucible of the arc melting furnace, and evacuate to 5.0×10 -3 Pa, and then filled with argon to a pressure of 600mbar for smelting, and then continued smelting for 2 minutes after melting, then let the alloy cool with the copper crucible until it solidified, then quickly turned it over, repeated smelting 5 times, and obtained an alloy ingot with uniform composition;

[0073] Step 3: Break the alloy in...

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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 converting, transferring, storing or changing the state of energy and information, and are important functional materials. They are widely used in the fields of machinery, electronics, electric power, communication and instrumentation. Among them, the magnetic material with low coercive force and high magnetic permeability is called soft magnetic material, which is a kind of magnetic material widely used in industries such as electric power, motor and electronics. Considering that most of the equipment made of soft magnetic materials work under the condition of alternating magnetic field, it is usually required to be small in size, high in p...

Claims

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Application Information

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