Iron-based amorphous and nano-crystalline soft magnetic alloy and preparation method thereof

A nanocrystalline soft magnetic, iron-based amorphous technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of low saturation magnetic induction, unfavorable development, and increased material costs, etc., to achieve high saturation magnetic induction, Excellent soft magnetic properties and low coercive force

Active Publication Date: 2017-05-31
GUANGDONG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the development and requirements of downstream applications, due to its low saturation magnetic induction (only about 1.25T), compared with silicon steel with high saturation magnetic induction, the application requires a larger volume under the same conditions and cannot adapt to lightweight , Miniaturization development requirements seriously limit its application; and compared with silicon steel, because it contains noble metal Nb, it also increases the cost of materials, which is not conducive to the development of society

Method used

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  • Iron-based amorphous and nano-crystalline soft magnetic alloy and preparation method thereof
  • Iron-based amorphous and nano-crystalline soft magnetic alloy and preparation method thereof
  • Iron-based amorphous and nano-crystalline soft magnetic alloy and preparation method thereof

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preparation example Construction

[0056] The present invention also provides a method for preparing an iron-based amorphous nanocrystalline soft magnetic alloy, comprising the following steps:

[0057] A) After smelting iron, silicon, boron source, phosphorus iron, copper and carbon iron, an alloy ingot is obtained;

[0058] The boron source includes boron and / or ferroboron;

[0059] B) stripping the alloy ingot obtained in the above steps after being broken to obtain an amorphous alloy strip;

[0060] C) Under the conditions of vacuum or protective atmosphere, heat-treat the amorphous alloy ribbon obtained in the above steps to obtain an iron-based amorphous nanocrystalline soft magnetic alloy.

[0061] In the present invention, an alloy ingot is obtained by first smelting iron, silicon, boron source, ferrophosphorus, copper and carbon iron; the boron source includes boron and / or ferroboron.

[0062] The present invention has no special limitation on the name and purity of the above-mentioned raw materials,...

Embodiment 1

[0081] Fe 84.7 Si 1.5 B 9 P 4 Cu 0.5 C 0.3

[0082] Iron-based amorphous nanocrystalline alloy, the chemical composition of the alloy is Fe 84.7 Si 1.5 B 9 P 4 Cu 0.5 C 0.3 .

[0083] see figure 1 , figure 1 It is a schematic flow chart of the process for preparing iron-based amorphous nanocrystalline soft magnetic alloy in the present invention.

[0084] Preparation steps:

[0085] (1) Master alloy raw material preparation: according to Fe 84.7 Si 1.5 B 9 P 4 Cu 0.5 C 0.3 The chemical formula converts atomic percentage to mass percentage, and weighs Fe (99.9%), FeB (17.6%) alloy, FeP (17%) alloy, FeC (2.25%) alloy, Si (99.9%) block and Cu block in proportion .

[0086] (2) Master alloy smelting: Put the prepared raw materials into the vacuum arc melting furnace, and evacuate the furnace body to 5×10 -3 Then fill it with argon / nitrogen atmosphere for protection, and close the filling valve when the pressure in the furnace is 0.01Mpa higher than the atmos...

Embodiment 2

[0096] Fe 84.2 Si 2 B 9 P 4 Cu 0.5 C 0.3

[0097] Iron-based amorphous nanocrystalline alloy, the chemical composition of the alloy is Fe 84.2 Si 2 B 9 P 4 Cu 0.5 C 0.3 .

[0098] Preparation steps:

[0099] (1) Master alloy raw material preparation: according to Fe 84.2 Si 2 B 9 P 4 Cu 0.5 C 0.3 The chemical formula converts atomic percentage to mass percentage, and weighs Fe (99.9%), FeB (17.6%) alloy, FeP (17%) alloy, FeC (2.25%) alloy, Si (99.9%) block and Cu block in proportion .

[0100] (2) Master alloy smelting: Put the prepared raw materials into the vacuum arc melting furnace, and evacuate the furnace body to 5×10 -3 Then fill it with argon / nitrogen atmosphere for protection, and close the filling valve when the pressure in the furnace is 0.01Mpa higher than the atmospheric pressure. Heat and smelt the raw material. After the raw material is completely melted, continue to smelt for 3 minutes, then cool to solidify, quickly turn it over and repeat...

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Abstract

The invention provides an iron-based amorphous and nano-crystalline soft magnetic alloy which has a general formula as shown in formula I, FexSiyBzPnCumCw, wherein x is greater than or equal to 84.0 and smaller than or equal to 85.0, y is greater than or equal to 0 and smaller than or equal to 2, z is greater than or equal to 8.5 and smaller than or equal to 10.5, n is greater than or equal to 3 and smaller than or equal to 4, m is greater than or equal to 0.3 and smaller than or equal to 1, w is greater than or equal to 0 and smaller than or equal to 1, and x+y+z+n+m+w is equal to 100. By adding special elements and supplementing with a corresponding proportion, the invention discloses the novel iron-based amorphous and nano-crystalline soft magnetic alloy with has high statured magnetic induction intensity. The alloy has excellent soft magnetic performances such as high magnetic induction intensity and low coercive force, does not contain a dear metal element B and greatly reduces cost of the material.

Description

technical field [0001] The invention belongs to the technical field of soft magnetic alloy functional materials, and in particular relates to an iron-based amorphous nanocrystalline soft magnetic alloy and a preparation method thereof. Background technique [0002] With the continuous progress of society, due to the development and needs of computer networks, high-density recording technology, power systems and high-frequency micro-magnetic devices, it is increasingly required that various components used have high performance, high quality, small size, Lightweight, which requires the continuous improvement of performance of metal functional materials such as soft magnetic alloys for the preparation of these devices. Among them, amorphous soft magnetic alloys are composed of their respective base metals and nonmetals. The former are ferromagnetic elements (iron, cobalt, nickel or their combinations), which are used to generate magnetism; the latter are vitrified elements, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02H01F1/153
CPCC22C33/003C22C45/02H01F1/15308
Inventor 徐佳杨元政李美瑶杨会军
Owner GUANGDONG UNIV OF TECH
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