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A kind of manufacturing method of high-performance re-tm-b permanent magnet material

A technology of permanent magnet material and manufacturing method, which is applied in the direction of magnetic material, inorganic material magnetism, magnetic object, etc., can solve the problems of low efficiency, diffusing product thickness requirements, and can not process products with large thickness, etc. Coercive force, the effect of temperature increase

Active Publication Date: 2017-06-16
ANHUI HANHAI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the limitation of diffusion speed and other conditions, the process of surface diffusion technology has low efficiency and requires the thickness of the diffused product, so it cannot process thicker products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0018] 1. Ingredients: The weight percentage of ingredients is PrNd 30%, Fe67%, Co 1.5%, Al 0.2%, Cu 0.1%, Nb 0.2%, B1%;

[0019] 2. Melting: The melting temperature is 1450°C, and the thickness of the smelting cast piece is 0.3-0.5mm;

[0020] 3. Cover the surface of the casting sheet with a Dy metal film layer of about 3 μm by plasma spraying, and age at a temperature of 900 ° C for 5 hours;

[0021] 4. Prepare powder with an average particle size of 3.2 μm by hydrogen crushing and jet milling. The whole preparation process is protected by inert gas. In order to prevent the powder from oxidation, 0.2% antioxidant is added;

[0022] 5. Press the blank under a 1.6T magnetic field, and the molding density of the blank is 4.2g / cm 3 ;

[0023] 6. Put the pressed billet into a vacuum sintering furnace, extract a vacuum of 3Pa, raise the temperature at a rate of 2°C / min, and keep it warm at 500-800°C, so that the gas absorbed in the billet, anti-oxidant, etc. Fully volatilize, a...

specific Embodiment approach 2

[0026] 1. Ingredients: The weight percentage of ingredients is PrNd 30%, Fe67%, Co 1.5%, Al 0.2%, Cu 0.1%, Nb 0.2%, B1%;

[0027] 2. Melting: The melting temperature is 1450°C, and the thickness of the smelting cast piece is 0.3-0.5mm;

[0028] 3. Cover the surface of the cast sheet with a Dy metal film layer of about 6 μm by plasma spraying, and age at a temperature of 900 ° C for 5 hours;

[0029] 4. Prepare powder with an average particle size of 3.2 μm by hydrogen crushing and jet milling techniques. The whole preparation process is protected by inert gas, and 0.2% antioxidant is added to prevent powder oxidation;

[0030] 5. Press the blank under a 1.6T magnetic field, and the molding density of the blank is 4.2g / cm 3 ;

[0031] 6. Put the pressed billet into a vacuum sintering furnace, extract a vacuum of 3Pa, raise the temperature at a rate of 2°C / min, and keep it warm at 500-800°C, so that the gas absorbed in the billet, anti-oxidant, etc. Fully evaporate. Keep th...

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PUM

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Abstract

The invention discloses a high-performance Re-TM-B permanent magnetic material manufacturing method which includes the steps of ingredient preparation, vacuum smelting, rapid-hardening cast piece film covering, covered cast piece aging, powder manufacturing, magnetic field forming and sintering. An over-performance Re-TM-B material is manufactured, limitations of a surface diffusion technology are broken through, the thickness limitation of a machined product is broken through, efficiency is greatly improved, coercivity of a permanent magnetic material is greatly improved, under the situation that remanence is similar, the coercivity of the permanent magnetic material is much higher than that of a rare earth permanent magnetic material manufactured through common technologies, and the use temperature of the material is increased over 20 DEG C.

Description

technical field [0001] The invention relates to the technical field of manufacturing permanent magnet materials, in particular to a method for manufacturing high-performance Re-TM-B permanent magnet materials. Background technique [0002] Rare earth permanent magnet materials, as a permanent magnet material with high magnetic energy product, have made great progress since their automatic birth. field has been widely used. In Nd-Fe-B series rare earth permanent magnet materials, the use of Nd or PrNd elements accounts for about 1 / 3 of the weight of the entire material, resulting in the price of Nd and PrNd elements relative to other rare earth elements. With the advancement of technology and the improvement of the production and processing level of Nd-Fe-B series rare earth permanent magnet materials. A series of other rare earth elements such as Tb, Dy, Gd, Ho, La, Ce gradually replace elements such as Nd and Pr, and the amount of some elements used even exceeds the total...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F1/08B22F3/16
Inventor 王文慧李翠平张有章张震
Owner ANHUI HANHAI NEW MATERIAL