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Preparation process of permanent magnet alloy of composite trace elements

A technology of compounding trace elements and permanent magnetic alloys, which is applied in the field of materials, can solve the problems of limited application and achieve excellent performance

Inactive Publication Date: 2022-06-24
宁波盛事达磁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the market's demand for permanent magnet material performance increases, various R&D institutions and enterprises are conducting research on it. The most widely used solution is to add strategic metals such as Co to the formula. The application is limited and needs to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The first step, the preparation of coated alloy powder

[0024] Mix Nd-Fe-B rare earth permanent magnetic alloy powder with polyamide-imide resin solution containing fluorinated graphene, supplemented by ultrasonic dispersion for 1h, wherein fluorinated graphene accounts for 2% of the rare earth permanent magnetic alloy powder , the polyamide-imide resin accounts for 1% of the rare earth permanent magnet alloy powder.

[0025] Microwave heating at 0.6Kw for 40min, and dry the solvent to obtain coated alloy powder.

[0026] Among them, in terms of mass%, Nd-Fe-B rare earth permanent magnet alloy powder: Nd20.0, Ho1.5, B0.8, Al0.1, HF0.1, P0.1, Zn0.1, Dy0.15, The balance is Fe and unavoidable impurities.

[0027] The second step, injection molding

[0028] Put the film-coated alloy powder, polyamide resin binder, and additives in a mixer for mixing, wherein the additives account for 0.5% of the rare earth permanent magnet alloy powder, and the polyamide resin binder ac...

Embodiment 2

[0031] The first step, the preparation of coated alloy powder

[0032] Mix Nd-Fe-B rare earth permanent magnet alloy powder with polyamide-imide resin solution containing fluorinated graphene, supplemented by ultrasonic dispersion for 1h, wherein fluorinated graphene accounts for 4% of the rare earth permanent magnet alloy powder , The polyamide-imide resin accounts for 2% of the rare earth permanent magnet alloy powder.

[0033] Microwave heating at 0.6Kw for 40min, and dry the solvent to obtain coated alloy powder.

[0034] Among them, in terms of mass%, Nd-Fe-B rare earth permanent magnet alloy powder: Nd22.5, Ho2.5, B1.3, Al0.15, HF0.25, P0.25, Zn0.15, Dy0.18, The balance is Fe and unavoidable impurities;

[0035] The second step, injection molding

[0036] Put the film-coated alloy powder, polyamide resin binder, and additives in a mixer for mixing, wherein the additives account for 0.8% of the rare earth permanent magnet alloy powder, and the polyamide resin binder ac...

Embodiment 3

[0039] The first step, the preparation of coated alloy powder

[0040] Mix Nd-Fe-B rare earth permanent magnet alloy powder with polyamide-imide resin solution containing fluorinated graphene, supplemented by ultrasonic dispersion for 1h, wherein fluorinated graphene accounts for 3% of the rare earth permanent magnet alloy powder , the polyamide-imide resin accounts for 1.5% of the rare earth permanent magnet alloy powder.

[0041] Microwave heating at 0.6Kw for 40min, and dry the solvent to obtain coated alloy powder.

[0042] Among them, in terms of mass%, Nd-Fe-B rare earth permanent magnet alloy powder: Nd21.0, Ho2.0, B1.0, Al0.12, HF0.2, P0.2, Zn0.12, Dy0.16, The balance is Fe and unavoidable impurities;

[0043] The second step, injection molding

[0044] Put the film-coated alloy powder, polyamide resin binder, and additives in a mixer for mixing, wherein the additives account for 0.7% of the rare earth permanent magnet alloy powder, and the polyamide resin binder ac...

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Abstract

According to the scheme, rare earth permanent magnet alloy powder is coated with a polyamide-imide resin film layer containing fluorinated graphene, then the rare earth permanent magnet alloy powder and a resin binder are mixed and subjected to injection molding, and the whole process is simple, easy to operate and low in energy consumption; the resin film is beneficial to combination of fluorinated graphene and powder and mixing with a resin binder, and addition of fluorinated graphene is beneficial to improvement of coercivity, corrosion resistance, toughness and the like. The components of the rare earth permanent magnet alloy are further improved, the residual magnetism, coercive force and the like are improved through HF, P and the like, the coercive force, corrosion resistance and the like are improved through cooperation of Al, Zn and the like, the coercive force is improved through Dy, the content of Nd, B and the like is correspondingly improved, and the prepared permanent magnet alloy is excellent in performance.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a preparation process of a permanent magnetic alloy compounded with trace elements. Background technique [0002] At present, the widely used permanent magnet materials include AlNiCo system, ferrite system, rare earth permanent magnet system, etc. For AlNiCo system, it contains more strategic metals Co and Ni, and has a small market share. Although ferrite is rich in raw material resources, it has the disadvantage of low magnetic properties. Nd-Fe-B series permanent magnet materials have the advantages of high magnetic properties and are widely used. The molding of the permanent magnet materials includes sintering, bonding and other processes. As the market demand for permanent magnet materials increases, various R&D institutions and enterprises are conducting research on them. The most widely used solution is to add strategic metals such as Co to the formula. The application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/057
CPCH01F41/026H01F1/0572H01F1/0578
Inventor 陈义张秋明陆国远李文军
Owner 宁波盛事达磁业有限公司
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