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A samarium cobalt 1:5 type permanent magnet material and its preparation method

A permanent magnet material, samarium cobalt technology, applied in magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve the problem that mass-produced products are difficult to break through, and achieve the effect of inhibiting the formation of high-temperature cobalt-rich impurity phases

Active Publication Date: 2020-10-16
福建省长汀卓尔科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another SmCo 5 The theoretical value of the coercive force of the alloy Hcj=400kOe, most of the SmCo on the market 5 The coercive force of magnetic steel products is basically maintained between 15 and 30kOe, and it is difficult for mass-produced products to break through this range

Method used

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  • A samarium cobalt 1:5 type permanent magnet material and its preparation method
  • A samarium cobalt 1:5 type permanent magnet material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Ingredients: 34% by weight of samarium metal with a purity of 99.95%, and 66% by weight of electrolytic cobalt with a purity of 99.98%;

[0028] (2) Smelting: The prepared raw materials containing samarium and cobalt are smelted in a vacuum quick-setting throwing belt furnace. The smelting temperature is controlled at 1630°C, and heat preservation and refining are carried out. The refining time is 4 minutes. Casting is carried out after refining, and the rotation speed of the copper roller is adjusted. It is 28 turns / min, and then the alloy liquid is cast onto the copper roller and quenched to obtain a samarium-cobalt quick-setting strip sheet with a thickness of 0.8mm;

[0029] (3) Homogenization treatment of cast slabs: Homogenize the samarium-cobalt quick-setting strip sheet, heat it to a homogenization treatment temperature of 950°C at a heating rate of 5°C / min, and keep it warm for 6 hours. Rapid cooling treatment, the cooling time from the highest temperature ...

Embodiment 2

[0034] (1) Ingredients: 35% by weight of samarium metal with a purity of 99.95%, and 65% by weight of electrolytic cobalt with a purity of 99.98%;

[0035] (2) Smelting: The prepared raw materials containing samarium and cobalt are smelted in a vacuum quick-setting throwing belt furnace. The smelting temperature is controlled at 1600°C, and heat preservation and refining are carried out. The refining time is 3 minutes. Casting is carried out after refining, and the rotation speed of the copper roller is adjusted. It is 36 turns / min, and then the alloy liquid is casted onto the copper roller for rapid cooling to obtain a samarium-cobalt quick-setting strip sheet with a thickness of 0.4mm;

[0036] (3) Homogenization treatment of cast slabs: Homogenize the samarium-cobalt quick-setting strip sheet, heat it to the homogenization treatment temperature 900°C at a heating rate of 5°C / min, and keep it warm for 8 hours. Rapid cooling treatment, the cooling time from the highest temper...

Embodiment 3

[0041] (1) Ingredients: 36% by weight of samarium metal with a purity of 99.95%, and 64% by weight of electrolytic cobalt with a purity of 99.98%;

[0042] (2) Smelting: The prepared raw materials containing samarium and cobalt are smelted in a vacuum quick-setting throwing belt furnace. The smelting temperature is controlled at 1650°C, and heat preservation and refining are carried out. The refining time is 5 minutes. Casting is carried out after refining, and the rotation speed of the copper roller is adjusted. It is 32 turns / min, and then the alloy liquid is cast on the copper roller and quenched to obtain a samarium-cobalt quick-setting strip sheet with a thickness of 0.6mm;

[0043] (3) Homogenization treatment of cast slabs: Homogenize the samarium-cobalt quick-setting strip sheet, heat it to the homogenization treatment temperature of 920°C at a heating rate of 5°C / min, and keep it warm for 4 hours. Rapid cooling treatment, the cooling time from the highest temperature ...

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Abstract

The invention relates to the technical field of permanent magnet materials, in particular to a samarium-cobalt 1:5 type permanent magnet material and a preparation method thereof. The samarium-cobalt1:5 type permanent magnet material is prepared from by weight fraction: 34%-36% of metal samarium and 64%-66% of metal cobalt. The preparation method of the samarium-cobalt 1:5 type permanent magnet material comprises the following steps: burdening, smelting of a cast sheet, homogenizing of the cast sheet, jet milling to obtain powder, molding, sintering and aging. According to the samarium-cobalt1:5 type permanent magnet material, the residual magnetism and coercive force performance of a 1:5 samarium-cobalt permanent magnet are improved by homogenizing the 1:5 samarium-cobalt quick-settingmelt-spinning sheet and matching with an appropriate jet milling process, the residual magnetism can reach 9.8 kGs or above, the coercive force can reach 35 kOe or above, the process can achieve stable mass production, and the percent of pass reaches 95% or above.

Description

technical field [0001] The invention relates to the technical field of permanent magnet materials, in particular to a samarium cobalt 1:5 permanent magnet material and a preparation method thereof. Background technique [0002] SmCo 5 The characteristics of permanent magnet alloys are: high magnetocrystalline anisotropy (K 1 =(15~19)*10 3 kJ / m 3 , K 1 is the magnetocrystalline anisotropy constant), the anisotropy field height (H A =31840kA / m), low temperature coefficient (compared with rare earth iron-based permanent magnet alloy), high Curie point (T c =720°C, T c Curie point or Curie temperature, SmCo 5 the T c It is more than twice as high as that of NdFeB). [0003] SmCo 5 Permanent magnetic alloys are generally used in watch cores, sensors, components with high dimensional accuracy requirements, small motors and other fields. With the advancement of technology, the requirements for magnetic steel in various fields are getting higher and higher, mainly for magn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/055H01F41/02
CPCH01F1/0556H01F1/0557H01F41/0253H01F41/0266
Inventor 陈李泽方傅忠伟王国雄范荣辉
Owner 福建省长汀卓尔科技股份有限公司
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