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Preparation method for samarium-cobalt permanent magnet material

A permanent magnet material, samarium cobalt technology, applied in the direction of magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve the problems of complex preparation process and achieve good oxidation resistance

Inactive Publication Date: 2019-04-09
王群华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process is more complex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The samarium cobalt permanent magnet material main body of the present embodiment is by following composition by general formula: Sm(Co 0.97 Ti 0.03 ) 4.8 Si 0.2 .

[0017] According to the above general formula, each element is weighed for batching; the batching is placed in the melting furnace, and the vacuum in the furnace reaches at least 5×10 -3 Pa; Then, pass helium gas until the pressure in the furnace is 50kPa; heat up to 1300°C to melt, stir, refine and cast into water-cooled copper molds for use.

[0018] The obtained alloy ingot is crushed, put into the quartz tube in the vacuum belt throwing machine, the diameter of the nozzle at the bottom of the quartz tube is 0.5 mm, after the chamber of the vacuum belt throwing machine is evacuated, the cavity is filled with protective gas; Turn on the power supply of the vacuum strip machine to heat and melt the alloy in the quartz tube. At the same time, control the distance between the nozzle at the bottom of the ...

Embodiment 2

[0020] The samarium cobalt permanent magnet material main body of the present embodiment is by following composition by general formula: Sm(Co 0.9 Ti 0.1 ) 4.5 Si 0.5 .

[0021] According to the above general formula, each element is weighed for batching; the batching is placed in the melting furnace, and the vacuum in the furnace reaches at least 5×10 -3 Pa; Then, pass helium gas until the pressure in the furnace is 80kPa; heat up to 1450°C to melt, stir, refine, and then cast it into a water-cooled copper mold for use.

[0022] The obtained alloy ingot is crushed and put into the quartz tube in the vacuum strip machine. The diameter of the nozzle at the bottom of the quartz tube is 0.8mm. After the cavity of the vacuum strip machine is vacuumed, fill the cavity with protective gas; Turn on the power supply of the vacuum strip machine to heat and melt the alloy in the quartz tube. At the same time, control the distance from the nozzle at the bottom end of the quartz tube ...

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Abstract

The invention discloses a preparation method for a samarium-cobalt permanent magnet material. The method has the advantages that components of SmCo5 alloy are adjusted through doping to obtain a largealloy component supercooling degree, and the rapid quenching technique is further adopted, so that aeolotropic SmCo5 with fine grain sizes is obtained; and deposition is carried out on the surface ofthe magnet material through the nanocluster deposition technology to obtain an oxidation-resistant covering layer, so that the prepared magnet material achieves high oxidation resistance.

Description

Technical field [0001] The invention relates to the field of magnetic material manufacture, in particular to a preparation method of a samarium cobalt permanent magnet material. Background technique [0002] Rare earth permanent magnet materials refer to permanent magnet materials made of alloys formed of rare earth metals and transition metals through a certain process. Rare earth permanent magnet material is the permanent magnet material with the highest comprehensive performance known now, which is more than 100 times higher than the magnetic properties of the magnetic steel used in the 90th century, much superior to ferrite and AlNiCo, and more than The magnetic properties of expensive platinum-cobalt alloys are twice as high. Due to the use of rare earth permanent magnet materials, it not only promotes the miniaturization of permanent magnet devices and improves the performance of products, but also promotes the production of some special devices. Therefore, the emerge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/058H01F41/02
CPCH01F1/0557H01F1/058H01F41/0273
Inventor 王群华
Owner 王群华
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