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A kind of tin-containing soft magnetic iron-based nanocrystalline-amorphous alloy and preparation method thereof

A technology of iron-based nanocrystalline and amorphous alloys, which is applied in the manufacture of inductors/transformers/magnets, magnetic objects, magnetic materials, etc., can solve the problems of low efficiency, unsuitability for mass production, and high cost, and achieve a simple and efficient preparation method. Easy application and promotion, low cost of raw materials

Active Publication Date: 2019-11-12
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are costly and inefficient, and are not suitable for mass production

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0024] The preparation method of the above-mentioned tin-containing soft magnetic iron-based nanocrystalline-amorphous alloy comprises the following steps:

[0025] (1) Prepare the raw materials according to the formula quantity, and then mix them;

[0026] (2) Repeatedly smelt the prepared raw materials in the smelting furnace. When smelting, first vacuumize and then fill in inert gas for protection, that is, first vacuumize the smelting furnace to 10 -3 Below Pa, fill in inert gas to more than 0.02MPa for melting until a master alloy with uniform composition is obtained;

[0027] (3) Remelt the master alloy, and then melt the master alloy in an electric arc furnace or an induction furnace by casting, and then inhale or spray it into a cooling mold to solidify into a bulk amorphous alloy, or quench the master alloy Sealed in a vacuum tube, heat the vacuum tube and the master alloy together until the master alloy melts, then quench into the cooling liquid and solidify into a ...

Embodiment 1

[0030] According to Fe 72 Mo 3 sn 1 P 8.7 C 7.0 B 5 Si 3.3 For the alloy composition, the atomic percentage of each element is converted into mass percentage before batching. The raw materials include pure elemental substances and their intermediate alloys, the purity of the raw materials can be within the general industrial purity requirements, and the total atomic percentage of impurities in the alloys does not exceed 2%.

[0031] The above raw materials are mixed and placed in a quartz tube, and put into an induction coil in a vacuum induction furnace for smelting. Vacuum the furnace to 10 -3 Pa below, and then filled with 0.04MPa high-purity argon for heating. The smelting was repeated 6 times to obtain a master alloy with uniform composition, and the surface of the alloy was clean and metallic.

[0032]The amorphous alloy block is prepared by casting, and the control of the atmosphere in the furnace is consistent with that during smelting. Put the master alloy i...

Embodiment 2

[0035] According to Fe 75.0 sn 1.0 C 7.0 Si 3.3 B 5.0 P 8.7 For the alloy composition, the atomic percentage of each element is converted into mass percentage before batching. The raw materials include pure elemental substances and their intermediate alloys, the purity of the raw materials can be within the general industrial purity requirements, and the total atomic percentage of impurities in the alloys does not exceed 2%.

[0036] The above raw materials are mixed and placed in a quartz tube, and put into an induction coil in a vacuum induction furnace for smelting. Vacuum the furnace to 10 -3 Pa below, and then filled with 0.05MPa high-purity argon and then heated. The smelting was repeated 5 times to obtain a master alloy with a uniform composition, and the surface of the alloy was clean and metallic.

[0037] A thin strip of amorphous alloy is prepared by stripping method: the alloy ingot is placed in a quartz tube with a small hole at the bottom. The diameter of...

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Abstract

The invention belongs to the technical field of magnetic metal materials, and in particular relates to a tin-containing soft magnetic iron-based nanocrystalline-amorphous alloy and a preparation method thereof. The alloy is made of Fe-(Mo, Nb, Cr)-(P, C, B, Si) series amorphous alloys are prepared by adding a small amount of Sn, and the preparation method includes the following steps: (1) melting; (2) rapid solidification; (3) annealing. The iron-tin binary alloy has a wide phase separation interval in composition. Adding tin element to the iron-based amorphous alloy can easily form a phase separation structure, and form iron-rich and iron-poor regions in the microstructure. The uneven distribution of iron element can increase the nucleation rate of α-Fe phase during the annealing process, and limit the growth of α-Fe grains, so that the amorphous alloy forms nanocrystalline-amorphous alloy after annealing, and obtains high saturation magnetization while maintaining a low coercive force.

Description

technical field [0001] The invention belongs to the technical field of magnetic metal materials, and in particular relates to a soft magnetic iron-based nanocrystalline-amorphous alloy containing tin and a preparation method thereof. Background technique [0002] Iron-based amorphous alloy is a new type of magnetic metal material developed in recent decades. It has typical soft magnetic characteristics, including high saturation magnetization and low coercive force. It has considerable use value and broad application prospects. . The magnetic properties of iron-based amorphous alloys are related to their composition. By changing the types and contents of alloying elements, the magnetic properties of iron-based amorphous alloys can be adjusted. Finding a more appropriate alloy ratio is one of the ways to obtain iron-based amorphous alloys with high magnetic properties. However, the composition of iron-based amorphous alloys is diverse, and it is difficult to have a universa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/02C22C38/12C22C38/32C22C38/02C22C38/22C22C38/26H01F1/153H01F41/02
CPCC22C38/002C22C38/008C22C38/02C22C38/12C22C38/22C22C38/26C22C38/32C22C45/02H01F1/15308H01F1/15333H01F1/15341H01F41/02
Inventor 陈晓阳张扬代巧范振敏
Owner JIANGSU UNIV OF TECH
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