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A low-cost corrosion-resistant single crystal magnetic powder and its preparation method and application

A corrosion-resistant and low-cost technology, applied in the field of low-cost corrosion-resistant single crystal magnetic powder and its preparation, can solve the problems of tight supply of Sm elements, limited global production, and reduction of magnetic powder coercivity, and achieve the effect of simple operation

Active Publication Date: 2020-08-04
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sm element is a relatively scarce resource, and the global production is limited. If mass production of Sm 2 Fe 17 N 3 Permanent magnet materials will cause tight supply of Sm elements
Direct use of cheap and high-abundance rare earth elements such as La and Ce to directly replace Sm will seriously reduce the coercive force of magnetic powder

Method used

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  • A low-cost corrosion-resistant single crystal magnetic powder and its preparation method and application
  • A low-cost corrosion-resistant single crystal magnetic powder and its preparation method and application
  • A low-cost corrosion-resistant single crystal magnetic powder and its preparation method and application

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preparation example Construction

[0031] The method for preparing the above-mentioned low-cost corrosion-resistant single-crystal magnetic powder may include, for example, the following steps: preparing nitride raw material magnetic powder, and then performing galvanizing treatment.

[0032] Wherein, preparing the nitride raw material magnetic powder may comprise the following steps:

[0033] The master alloy is melted and cast into ingots. Specifically, using metal elements Sm, R1, T, M1 and Cu as raw materials, according to the chemical formula ratio (Sm 1-α R1 α ) a T 100-a-b-c-d-v M1 b Cu c For batching, the master alloy is melted by induction under the protection of argon, and the melt is cast into cast pieces by using a water-cooled copper roller with a speed of 2-20m / s.

[0034] In some embodiments, when the cast sheet is prepared by the quick-setting ingot casting technology, for example, the surface linear velocity range of the copper roller can be controlled at 2-20m / s, and the thickness of the...

Embodiment 1

[0058] With a purity of 99.9% pure Sm, pure Ce, pure Fe, pure Zr and pure Cu metals as raw materials, according to the following chemical formula ingredients: (Sm 0.4 Ce 0.6 ) 11.58 Fe 86.42 Zr 1.00 Cu 1.00 (at%). Since Sm is easy to volatilize, an extra 10% is added on the basis of the theoretical value as compensation.

[0059] The prepared metal raw materials are put into an induction melting furnace and smelted in high-purity Ar. Induction heating is used to heat the alloy until the raw materials are completely melted and uniform. At this time, the temperature of the melt is about 1550°C, and the speed of water-cooled copper rolls is used to prepare quick-setting cast sheets. The surface speed of the copper rolls is 10m / s.

[0060] The cast piece was placed in a corundum crucible, and the first heat treatment was performed for 20-30 minutes under the protection of argon at 800-1000°C (specifically corresponding to the heat treatment conditions of the master alloy in ...

Embodiment 2

[0072] With a purity of 99.9% pure Sm, pure Ce, pure Fe, pure Zr and pure Cu metals as raw materials, according to the following chemical formula ingredients: (Sm 0.6 Ce 0.4 ) 11.58 Fe 86.42 Zr 1.00 Cu 1.00 (at%). Since Sm is easy to volatilize, an extra 10% is added on the basis of the theoretical value as compensation.

[0073]The prepared metal raw materials are put into an induction melting furnace and smelted in high-purity Ar. Induction heating is used to heat the alloy until the raw materials are completely melted and uniform. At this time, the temperature of the melt is about 1550°C, and the speed of water-cooled copper rolls is used to prepare quick-setting cast sheets. The surface speed of the copper rolls is 10m / s.

[0074] The cast piece was placed in a corundum crucible, and the first heat treatment was performed for 20-30 minutes under the protection of argon at 800-1000°C (specifically corresponding to the heat treatment conditions of the master alloy in T...

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Abstract

The invention relates to a low-cost corrosion-resistant single crystal magnetic powder and a preparation method and application thereof, belonging to the technical field of rare earth permanent magnetmaterials. The composition of the magnetic powder is (Sm 1 alfa R 1 alfa) aT 100-A-B -C -D-VM1bCucZndNv. R1 is at least one of La, Ce, Pr, Nd and Y, 0.1 Alpha. (0.6; 5 <=a <=20; T is iron or iron and cobalt; M1 is at least one of Si, Al, Ni, Ti, V, Cr, Zr, Hf, Nb, Ta, Mn, Mo and W, 0.1. Ltoreq. B. Ltoreq. 5; 0.1 <=c <= 5; 0.1 <=d <= 20; 0.5 <= v <=20. The magnetic powder has low cost and high magnetization, coercivity, oxidation resistance and corrosion resistance. The preparation includes preparing nitride raw material magnetic powder, and then performing zinc plating treatment. The methodis simple and the obtained magnetic powder can be used for preparing anisotropic bonded permanent magnetic materials and the like.

Description

technical field [0001] The invention belongs to the technical field of rare earth permanent magnet materials, and in particular relates to a low-cost corrosion-resistant single-crystal magnetic powder and a preparation method and application thereof. Background technique [0002] At present, as an important basic material in modern society, rare earth permanent magnets are widely used in industries such as computers, automobiles, instruments, meters, household appliances, petrochemicals, healthcare, and aerospace. [0003] Among them, Sm 2 Fe 17 N x with Nd(Fe,M) 12 N x It is considered as a candidate for the next generation of rare earth permanent magnets. Sm element is a relatively scarce resource, and the global production is limited. If mass production of Sm 2 Fe 17 N 3 Permanent magnet materials will cause tight supply of Sm elements. The direct use of cheap and high-abundance rare earth elements such as La and Ce to directly replace Sm will seriously reduce th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/09H01F41/00C30B29/38C30B1/10
CPCC30B1/10C30B29/38H01F1/09H01F41/00
Inventor 卢赐福周庆肖方明
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI