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Preparation method of samarium-cobalt magnet

A samarium-cobalt magnet, samarium-cobalt technology, applied in the direction of magnetic objects, inductors/transformers/magnets, magnetic materials, etc., can solve the problems of not easy to industrialize manufacturing, increase manufacturing cost, increase manufacturing difficulty, etc., and achieve easy industrialization The effects of manufacturing, improving economic efficiency, and reducing manufacturing difficulty

Active Publication Date: 2020-10-09
赣州科瑞精密磁材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additional rare earth metals increase manufacturing costs
In addition, the B powder mentioned in the technical proposal needs to be manufactured into nano-powder, which increases the difficulty of manufacturing and is not easy for industrialized manufacturing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] A preparation method of a samarium cobalt magnet, comprising the steps of:

[0032] (1) Preparation of base powder BA

[0033] Prepare samarium-cobalt alloy base powder BA according to the following weight percentage: Sm: 23.7-26.3%, Fe: 10-20%, Zr: 3-4%, Cu: 3-5%, and the balance is Co;

[0034] The above prepared samarium-cobalt alloy basic powder BA is melted and casted by electromagnetic induction under the protection of argon gas to obtain an alloy ingot, and then crushed mechanically to prepare alloy particles with a size of 0.5-1mm; the process is carried out under the protection of argon gas. Melting and casting effectively prevent the volatilization of Sm;

[0035] Then use the jet milling technology to make the alloy particles fully mixed with the lubricant into 2.5-5μm alloy powder; during the jet milling process, add 100-3000ppm oxygen to the jet mill gas circuit;

[0036] (2) Preparation of auxiliary powder SA

[0037] Prepare samarium-cobalt alloy auxil...

Embodiment 1

[0052] (1) Preparation of base powder BA

[0053] Prepare samarium-cobalt alloy base powder BA according to the following weight percentage: Sm: 23.7%, Fe: 19.7%, Zr: 3%, Cu: 5%, Co: balance;

[0054] Melting and casting the prepared samarium-cobalt alloy basic powder BA above to obtain an alloy ingot, and then crushing it mechanically to prepare alloy particles with a size of 0.5-1 mm;

[0055] The jet milling technology is used to make the alloy particles fully mixed with the lubricant into 2.5-5μm alloy powder; during the jet milling process, 100% oxygen is added to the jet mill gas circuit;

[0056] (2) Preparation of auxiliary powder SA

[0057] Prepare samarium-cobalt alloy auxiliary powder SA according to the following weight percentage: Sm: 26.3%, Fe: 19.7%, Zr: 3%, Cu: 5%, Co: balance;

[0058] The above prepared samarium-cobalt alloy auxiliary powder SA is melted and casted by electromagnetic induction under the protection of argon to obtain alloy ingots, and then me...

Embodiment 2

[0071] (1) Preparation of base powder BA

[0072] Prepare samarium-cobalt alloy base powder BA according to the following weight percentage: Sm: 25.1%, Fe: 15.4%, Zr: 3%, Cu: 5%, Co: balance;

[0073] The above prepared samarium-cobalt alloy basic powder BA is melted and casted by electromagnetic induction under the protection of argon to obtain an alloy ingot, and then mechanically crushed to prepare alloy particles with a size of 0.5-1 mm;

[0074] The alloy particles fully mixed with the lubricant are made into 2.5-5μm alloy powder by jet milling technology; during the jet milling process, 1000ppm of oxygen is added to the jet mill gas circuit;

[0075] (2) Preparation of auxiliary powder SA

[0076] Prepare samarium-cobalt alloy auxiliary powder SA according to the following weight percentage: Sm: 27.8%, Fe: 15.4%, Zr: 3%, Cu: 5%, Co: balance;

[0077] The above prepared samarium-cobalt alloy auxiliary powder SA is melted and casted by electromagnetic induction under the...

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PUM

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Abstract

The invention relates to a preparation method of a samarium-cobalt magnet, and belongs to the technical field of rare earth permanent magnet materials. Basic powder BA and auxiliary powder SA are evenly mixed according to the ratio of BA to SA being (2-3):1, a green body is obtained through magnetic field forming and isostatic pressing, and the samarium-cobalt magnet is prepared through sinteringsecondary solid solution and aging treatment. The samarium-cobalt magnet prepared by the invention is applied to the field of relays, and has very high stability, and the magnet properties are as follows: Br:9.7-10.5 kGS, Hcb:8.5-9 kOe, Hcj:10.4-11.6 kOe, and (BH)max=203.7-206.5 kJ / m<3>.

Description

technical field [0001] The invention relates to the technical field of rare earth permanent magnet materials, in particular to a preparation method of a samarium cobalt magnet. Background technique [0002] Due to its energy conversion function and various magnetic physical effects, permanent magnet materials are widely used in various fields such as information, communication, aerospace, transportation, etc., and become one of the important material foundations for high-tech, emerging industries and social progress. Among them, the 2:17 type samarium cobalt permanent magnet material, which is the second generation rare earth permanent magnet material, has high magnetic properties, extremely low temperature coefficient and high Curie temperature on the one hand, and good corrosion resistance and high curie temperature on the other hand. Oxidation resistance, so it plays an irreplaceable role in the field of high temperature and high stability, and is widely used in microwave...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/055H01F41/02
CPCH01F1/055H01F1/0556H01F1/0557H01F41/0266
Inventor 杨善平王超石钟山
Owner 赣州科瑞精密磁材有限公司
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