Rare earth permanent magnet material and preparation method and application thereof
A rare-earth permanent magnet and rare-earth element technology, which is applied in the fields of magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve problems such as magnet performance deterioration
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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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