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High-performance permanent magnet material and production method thereof

A technology of permanent magnetic material and manufacturing method, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of increased difficulty of columnar crystal structure, increased difficulty of high magnetic energy product, increased brittleness, etc.

Active Publication Date: 2015-03-25
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase of Al content will lead to the increase of the brittleness of the material, and the increase of Ti will refine the grain of the material. With the increase of Ti content, the difficulty of obtaining columnar grain structure will also increase, and the difficulty of obtaining high magnetic energy product will increase relatively. Especially when the Ti content is greater than 8% (mass fraction), castings with better columnar crystals cannot be obtained under current industrial production conditions.

Method used

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  • High-performance permanent magnet material and production method thereof
  • High-performance permanent magnet material and production method thereof
  • High-performance permanent magnet material and production method thereof

Examples

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preparation example Construction

[0131] Preparation of AlNiCo Permanent Magnet

[0132] The present invention also provides a method for preparing the above-mentioned materials, and the method includes the steps:

[0133] (1) Melting the mixture of each component to obtain a smelting mixture;

[0134] (2) Pouring with the smelting mixture to obtain a crystal-oriented alloy, and performing solution treatment;

[0135] (3) Place the molten alloy after solution treatment in a magnetic field to cool;

[0136] (4) Perform a magnetic field isothermal heat treatment on the cooled molten alloy to obtain the material.

[0137] In another preferred embodiment, in the pouring step, the temperature of the smelting mixture is controlled at 1600-1700°C, preferably 1630-1670°C.

[0138] In order to obtain materials with better performance, the smelting mixture needs to be cooled in a magnetic field. Preferably, in the cooling step, the orientation direction of the smelting mixture is parallel to the direction of the magnetic field.

[...

Embodiment 1

[0174] A high-coercivity high-performance Al-Ni-Co permanent magnet alloy is as follows: Al: 8.6%; Ni: 14.5%; Co: 44.0%; Cu: 4.0%; Ti: 8.4%; C: 0.08%; FeS: 1.1%; Si: 0.25%; Fe is the remaining design component, which is prepared after raw materials are prepared.

[0175] The preparation process of a high-coercivity and high-performance Al-Ni-Co permanent magnet alloy is carried out according to the following steps:

[0176] (1) Modeling: Use bauxite of different particle sizes to mix, add bentonite and appropriate amount of water as a binder, mix well and let stand for 24 hours before modeling. The sand mold includes a honeycomb mold with eight parts and a pouring riser.

[0177] (2) Melting and pouring: use an intermediate frequency induction melting furnace to melt the four high-melting elements of Co, Ni, Fe, and Cu during smelting, and then add C powder with a particle size of about tens of μm to spread it evenly on the molten steel On the surface, react for about 30 seconds, a...

Embodiment 2

[0186] A high-coercivity high-performance Al-Ni-Co permanent magnet alloy according to Al: 8.4%; Ni: 14%; Co: 40.0%; Cu: 3.0%; Ti: 8.2%; C: 0.08%; FeS: 1.1%; Si: 0.25%; Fe is the remaining design component, which is prepared after raw materials are prepared.

[0187] A preparation method of high-coercivity and high-performance Al-Ni-Co permanent magnet alloy is carried out according to the following steps:

[0188] (1) Modeling: Mix bauxite with different particle diameters, add bentonite and an appropriate amount of water as a binder, mix well and let stand for 24 hours before modeling. The sand mold includes a honeycomb mold with eight parts and a pouring riser.

[0189] (2) Melting and pouring: use an intermediate frequency induction melting furnace to melt the four high-melting elements of Co, Ni, Fe, and Cu during smelting, and then add C powder with a particle size of about tens of μm to spread it evenly on the molten steel On the surface, react for about 30 seconds, add Si, ...

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Abstract

The invention provides a high-performance permanent magnet material and a production method thereof, and particularly provides a permanent magnet material. The permanent magnet material comprises, by total weight, 30-50% of cobalt, 6-10% of titanium, 12-16% of nickel and 6-10% of aluminum. The permanent magnet material has excellent physical and magnetic performance.

Description

Technical field [0001] The present invention relates to the field of permanent magnetic material preparation. Specifically, the present invention provides an alnico permanent magnet material and a preparation method thereof. Background technique [0002] As the first-generation permanent magnet, AlNiCo permanent magnet material has lower magnetic properties than NdFeB and SmCo permanent magnet materials, but due to its excellent temperature stability and time stability, the use temperature can reach 600℃ or more, and its chemical Good stability, corrosion resistance and not easy to oxidize, making it irreplaceable in the military industry. It is especially suitable for use in torpedoes, missiles, aircraft and other weapons and satellites with high precision and stability requirements. [0003] Compared with the second and third generation permanent magnetic materials, AlNiCo permanent magnetic materials have comparable remanence, but the coercivity and magnetic energy product are l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/047C22C30/00C22C1/02C22F1/00C22F3/00
Inventor 孙颖莉罗仪铭冯孝超李东闫阿儒刘涛
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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