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Fe-based soft magnetic alloy and preparation method of soft magnetic alloy strip

A soft magnetic alloy and alloy technology, applied in magnetic materials, magnetic objects, electrical components, etc., can solve the problems of cutting and winding difficulties, low glass forming ability, high raw material cost, etc., and achieve convenient test operation and excellent soft magnetic properties , good mechanical properties

Inactive Publication Date: 2019-05-24
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there are three main problems in the current Fe-based nanocrystalline ribbons: first, because the glass-forming ability of Fe-based amorphous alloys is generally low, in order to prepare single-phase amorphous ribbons, high-purity raw materials are necessary, The cost of raw materials is high; secondly, nanocrystalline particles are obtained by annealing amorphous strips, that is, the preparation process is divided into two steps, first to obtain single-phase amorphous strips, and then annealing them to precipitate nanocrystals, so the process The process is long, the production efficiency is low, and the annealing process also increases energy consumption; finally, the nanocrystalline strip has poor toughness and is easily broken due to high-temperature annealing, which causes great difficulties for cutting and winding, reducing the Product yield

Method used

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  • Fe-based soft magnetic alloy and preparation method of soft magnetic alloy strip
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  • Fe-based soft magnetic alloy and preparation method of soft magnetic alloy strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of Fe 76 Ni 4 co 4 B 12 Si 4 Amorphous-nanocrystalline soft magnetic alloy strip:

[0039] In the first step, Fe, Ni, Co, Fe-Si alloy and Fe-B alloy of industrial purity are added to the furnace so that the raw materials therein are 76 Ni 4 co 4 B 12 Si 4 The atomic percentages are formulated, and the subscript of each element corresponds to its mole percentage. When batching, first grind to remove the oxide skin on the surface of the metal raw material.

[0040] In the second step, put the proportioned raw materials into the copper crucible of the electric arc furnace, -3 Under the condition of Pa, high-purity argon gas is introduced; under the condition of argon gas protection, the raw materials with good ratio are smelted by electric arc to prepare the master alloy ingot. In order to ensure that the composition of the master alloy is uniform, the master alloy is repeatedly smelted 4 to 6 times.

[0041] The third step is to crush the above-men...

Embodiment 2

[0046] Preparation of Fe 79 Ni 3 co 3 B 10 Si 5 Amorphous-nanocrystalline soft magnetic alloy strip:

[0047] The first step is to add industrial purity Fe, Ni, Co, Fe-Si alloy, Fe-B alloy into the furnace, so that the raw materials in it are 79 Ni 3 co 3 B 10 Si 5 The atomic percentages are formulated, and the subscript of each element corresponds to its mole percentage. When batching, first grind to remove the oxide skin on the surface of the metal raw material.

[0048] In the second step, put the proportioned raw materials into the copper crucible of the electric arc furnace, -3 Under the condition of Pa, high-purity argon gas is introduced; under the condition of argon gas protection, the raw materials with good ratio are smelted by electric arc to prepare the master alloy ingot. In order to ensure that the composition of the master alloy is uniform, the master alloy is repeatedly smelted 4 to 6 times.

[0049] The third step is to crush the above-mentioned ma...

Embodiment 3

[0054] Preparation of Fe 82 Ni 2 co 2 B 8 Si 4 Amorphous-nanocrystalline soft magnetic alloy strip:

[0055] The first step is to add industrial purity Fe, Ni, Co, Fe-Si alloy, Fe-B alloy into the furnace, so that the raw materials in it are 82 Ni 2 co 2 B 8 Si 4 The atomic percentages are formulated, and the subscript of each element corresponds to its mole percentage. When batching, first grind to remove the oxide skin on the surface of the metal raw material.

[0056] In the second step, put the proportioned raw materials into the copper crucible of the electric arc furnace, -3 Under the condition of Pa, high-purity argon gas is introduced; under the condition of argon gas protection, the raw materials with good ratio are smelted by electric arc to prepare the master alloy ingot. In order to ensure that the composition of the master alloy is uniform, the master alloy is repeatedly smelted 4 to 6 times.

[0057] The third step is to crush the above-mentioned mast...

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Abstract

The invention relates to a Fe-based soft magnetic alloy. The Fe-based soft magnetic alloy is prepared from the components: FeNiCo<c>B<d>Si<e>, wherein atomic percentage comprises that a is greater than or equal to 76 and less than or equal to 82, b is greater than or equal to 2 and less than or equal to 4, c is greater than or equal to 2 and less than or equal to 4, d is greater than or equal to 8 and less than or equal to 12, e is greater than or equal to 2 and less than or equal to 8, and a requirement of a+b+c+d+e=100 is met; the Fe-based soft magnetic alloy is an amorphous-nanocrystal biphasic structure, the average grain size d<c> of the amorphous-nanocrystal biphasic structure meets that d<c> is greater than or equal to 26nm and less than or equal to 33nm, the coercive force H<c> meets that H<c> is greater than or equal to 3.9A / m and less than or equal to 4.2 A / m, and the saturation magnetization meets that M<s> is greater than or equal to 166emu / g and less than or equal to171em / g. Compared with the prior art, raw materials used in the Fe-based soft magnetic alloy are common Fe, Ni, Co and immediate alloys Fe-B and Fe-Si, rare metals similar to Nb are not contained, the cost is low, the preparation process is simple, and good toughness is achieved.

Description

technical field [0001] The invention relates to an Fe-based soft magnetic alloy strip, in particular to an Fe-based soft magnetic alloy and a method for preparing the soft magnetic alloy strip. Background technique [0002] The earliest soft magnetic material was industrial pure iron, and later developed electrical silicon steel and permalloy with better performance, as well as ferrite suitable for high frequency range. These soft magnetic materials basically meet most of the needs of industrial applications, but with the continuous advancement of technology, their shortcomings began to appear. For example, since pure iron is a crystalline material with anisotropy, the coercive force H c Generally greater than 50A / m, the hysteresis loss is serious; because silicon steel contains more non-metallic element silicon, it is difficult to cold work, and its resistivity is low, so the eddy current loss is large; because permalloy has a higher content of nickel, so The cost of raw ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/08C22C38/10C22C33/06H01F1/147
Inventor 张梅琳吴懋亮韩清鹏蔄靖宇
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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