A kind of rare earth permanent magnet material and its preparation method and application
A rare-earth permanent magnet and rare-earth element technology, applied in the direction of magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve the problems of magnet performance deterioration, achieve uniform magnetic performance, good temperature stability, and good magnetic performance Effect
Active Publication Date: 2021-08-27
FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to overcome the defect of magnet performance deterioration caused by the low B system (B<5.88at%) in the prior art, and provide a rare earth permanent magnet material and its preparation method and application
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1～19 and comparative example 1～6
[0275] The raw materials used for preparing rare earth permanent magnet materials in Examples 1-19 and Comparative Examples 1-6 are as shown in Table 1, and the technology for its preparation is as follows:
[0276] (1) Melting process: according to the formula shown in Table 1, take the prepared raw materials and put them into a crucible made of alumina, and put them in a high-frequency vacuum induction melting furnace at 5×10 -2 Vacuum smelting at a temperature below 1500°C in a vacuum of Pa to obtain a melt.
[0277] (2) Casting process: Ar gas is introduced into the smelting furnace after vacuum smelting to make the air pressure reach 55,000 Pa, and then the casting is carried out, and the molten liquid is passed through a copper roller with a speed of 29 rpm to obtain a speed of 0.12-0.35mm thickness. Condensed gold sheet, during the casting process, the copper roller needs to be fed with chilled water, and the temperature of the water inlet is ≤25°C.
[0278] (3) Hydrog...
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Abstract
The invention discloses a rare earth permanent magnet material, a preparation method and application thereof. The raw material composition of the rare earth permanent magnet material includes the following components in mass content: R: 28.5-33.0%; Ga: 0.5-1.8% but not 0.5wt%; B: 0.84-0.94%; Al: 0.05-0.07% ; Co: ≤2.5% but not 0; Fe: 62-69%; N: one or more of Ti, Zr and Nb; when N contains Ti, the content of Ti is 0.15-0.25%; when N When Zr is included, the content of Zr is 0.2-0.35%; when N includes Nb, the content of Nb is 0.2-0.5%; the percentage is the mass percentage of the mass of each component in the total mass of the raw material composition. The magnetic properties (remanence, coercive force, squareness, temperature stability) of the rare earth permanent magnet material of the present invention are better, and the magnetic properties of the same batch of products are uniform.
Description
technical field [0001] The invention relates to a rare earth permanent magnet material and a preparation method and application thereof. Background technique [0002] R-T-B series sintered magnets (R refers to rare earth elements, T refers to transition metal elements and the third main group metal elements, B refers to boron elements) are widely used in electronic products, automobiles, wind power, home appliances, elevators and Industrial robots and other fields, such as hard disks, mobile phones, earphones, and permanent magnet motors such as elevator traction machines and generators, are used as energy sources. , temperature stability, magnet squareness and other requirements are gradually increasing. [0003] In order to increase the remanence of R-T-B sintered magnets, it is usually necessary to reduce the B content. But when the content of B is at a lower level, R will be formed 2 T 17 Mutually. while R 2 T 17 There is no uniaxial anisotropy at room temperature...
Claims
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IPC IPC(8): H01F1/057H01F41/02
CPCH01F1/0577H01F41/0253
Inventor 付刚许德钦黄佳莹陈大崑黄清芳
Owner FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD