Preparation method of anisotropic rare earth permanent magnet alloy material and magnetic powder

An anisotropic, rare earth permanent magnet technology, applied in magnetic materials, magnetic objects, electrical components, etc., can solve the problems of complex process, low magnetic performance and high cost

Active Publication Date: 2012-04-04
SHENYANG GENERAL MAGNETIC
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems, the present invention provides a microcrystalline-based Sm-Fe-N anisotropic magnetic powder and a preparation method thereof, which solve the problems in the prior art of complex processes, expensive equipment, low magnetic properties and uniform magnetic properties. Poor performance and high cost

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  • Preparation method of anisotropic rare earth permanent magnet alloy material and magnetic powder
  • Preparation method of anisotropic rare earth permanent magnet alloy material and magnetic powder

Examples

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Embodiment 1

[0022] Example 1: Press Sm 2+X (Fe 1-y m y ) 17 Composition formulation of the original Sm-Fe alloy, considering the volatilization of Sm and the inhibition of the formation of α-Fe phase, more Sm must be added. In this example, X=0.7, M is Cu, y=0.1, and only Cu element is added. Its function: refine the grain, increase the contact resistance and improve the coercive force Hcj; at the same time, it is also beneficial to the processing deformation, reduces the deformation resistance, and improves the anisotropy field of the alloy; the ingredients in this example are: Sm 2.7 (Fe 0.9 Cu 0.1 ) 17 Sm-Fe alloy raw materials. In the device 1 for preparing anisotropic alloy magnetic powder, Sm 2.7 (Fe 0.9 Cu 0.1 ) 17 Alloy raw materials are put into the crucible of medium frequency induction melting furnace 2, and the vacuum is ≤5×10 -2 Pa, fill with argon Ar to 0.04MPa, medium frequency induction heating to melting, temperature control within 1390-1430°C, adopt strip cast...

Embodiment 2

[0025] Embodiment 2: In this example, press Sm 2.8 (Fe 0.84 Ga 0.01 Nb 0.15 ) 17 Composition preparation of the original Sm-Fe alloy, in the device 1 for preparing anisotropic alloy magnetic powder, the Sm-Fe alloy raw material is put into the crucible of the medium frequency induction melting furnace 2, and the vacuum is ≤5×10 -2 Pa, filled with argon Ar to 0.04MPa, medium frequency induction heating to melting, the temperature is controlled within the range of 1390-1430°C, using quick-setting process, water-cooled copper wheel 5 speed V 铜轮速 =2.5m / s, through the outlet of the tundish 3 close to the upper right of the water-cooled copper wheel 4, the molten Sm 2.8 (Fe 0.84 Ga 0.01 Nb 0.15 ) 17 The original ingredient alloy melt is 10 2 -10 4 ℃ / S speed cooling into 0.1-0.45mm thick, isotropic soft magnetic Sm 2.8 (Fe 0.84 Ga 0.01 Nb 0.15 ) 17 Quick-setting alloy flakes9. Then by the conveying roller table 8, the Sm under the state of 600-900°C 2.8 (Fe 0.9 Cu ...

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Abstract

A preparation method of anisotropic rare earth permanent magnet alloy material and magnetic powder belongs to the technical field of rare earth iron-based permanent magnet material, wherein the material includes the content of Sm2+X(Fe1-yMy) 17NZ, wherein M is at least one of the Cu, Al, Zn, Sn, Ga, Ni, Zr, Cr, Ti and Nb, y=0-4, z=2.5-3.0. The preparation includes the steps of: preparing a certain content of Sm-Fe alloy raw materials, in the anisotropic rare earth permanent magnet alloy magnetic powder preparing device, under the protective atmosphere of vacuum and Ar, preparing the soft magnetic Sm2+X(Fe1-yMy) 17 rapid-solidified alloy slices mainly containing microcrystallines with obvious processing structure and anisotropism, crushing the slices into fine powders, and thermally penetrating and diffusing the N to obtain the Sm2+X(Fe1-yMy) 17NZ permanent magnet alloy magnetic powder with obvious processing structure and anisotropism. The invention solves the problems of complex process, low magnetic performance and bad anisotropism.

Description

Technical field: [0001] The invention belongs to the technical field of rare earth iron-based permanent magnet materials, and in particular relates to an anisotropic rare earth permanent magnet alloy magnetic powder and a preparation method thereof. technical background: [0002] In 1990, Irish researcher Coey discovered Sm 2 Fe 17 N z interstitial intermetallic compound [1] , with Nd 2 Fe 14 Compared with intermetallic compound B, it has a higher Curie temperature Tc=470°C and a higher anisotropy field H A =15.6T, magnetic energy product (BH)m=407KJ / m 3 , thermal stability and contact resistance are better than Nd 2 Fe 14 B, Immediately aroused the great attention of magnetic workers in the world, thinking that this material has the potential to become a new generation of rare earth permanent magnet materials. [0003] Sm-Fe-N compounds are prone to irreversible decomposition reactions at temperatures higher than 550°C. The methods currently being developed and ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/053C22C1/02B22D11/06B22F9/04
Inventor 徐孝荣裴文利杨永泽孙宝玉
Owner SHENYANG GENERAL MAGNETIC
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