A kind of sintered rare-earth permanent magnet material added with vc and preparation method thereof
A rare earth permanent magnet and sintered magnet technology, applied in magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve problems such as grain coarsening, achieve small grain size, improve comprehensive magnetic properties, and eliminate obvious problems. The effect of microporosity
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Embodiment 1
[0046] The sintered rare earth permanent magnet material prepared in this embodiment has the chemical formula of Nd 29.89 Fe 63.62 co 4.93 Ga 0.64 B 0.92 The magnet is composed of vanadium carbide, and the process steps are as follows:
[0047] (1) Ingredients
[0048] Dosing according to the chemical formula of the above-mentioned magnets, and remove the oxides and impurities on the surface of the raw materials;
[0049] (2) Casting
[0050] Put the prepared raw materials in step (1) into a vacuum induction melting furnace and melt them under the condition of high-purity argon gas. Quick-setting alloy cast sheet with a thickness of 0.25mm;
[0051] (3) Preparation of magnetic powder
[0052] Put the alloy cast sheet obtained in step (2) into a rotary hydrogen explosion furnace for hydrogen crushing treatment to obtain coarsely crushed alloy particles with a particle size of 10-300 μm, and carry out jet mill crushing of the obtained alloy coarsely crushed particles und...
Embodiment 2
[0068] The sintered rare earth permanent magnet material prepared in this embodiment has the chemical formula of Nd 32.92 Fe 65.07 co 1.0 B 1.01 The magnet is composed of vanadium carbide, and the process steps are as follows:
[0069] (1) Ingredients
[0070] Dosing according to the chemical formula of the above-mentioned magnets, and remove the oxides and impurities on the surface of the raw materials;
[0071] (2) Casting
[0072] Put the raw materials prepared in step (1) into a vacuum induction melting furnace and melt them under the condition of high-purity argon. After melting, pour the alloy liquid on a water-cooled copper roller with a linear speed of 3.5m / s, and then quickly cool it to obtain Quick-setting alloy cast sheet with an average thickness of 0.22mm;
[0073] (3) Preparation of magnetic powder
[0074] Put the alloy cast sheet obtained in step (2) into a rotary hydrogen explosion furnace for hydrogen crushing treatment to obtain coarsely crushed alloy...
Embodiment 3
[0090] The sintered rare earth permanent magnet material prepared by the present embodiment has the chemical formula of (Nd, Pr) 32.52 Fe 65.08 co 0.79 B 0.71 Ga 0.2 al 0.4 Cu 0.3 The magnet is composed of vanadium carbide, and the process steps are as follows:
[0091] (1) Ingredients
[0092] Dosing according to the chemical formula of the above-mentioned magnets, and remove the oxides and impurities on the surface of the raw materials;
[0093] (2) Casting
[0094] Put the prepared raw materials in step (1) into a vacuum induction melting furnace and melt them under the condition of high-purity argon gas. Quick-setting alloy cast sheet with a thickness of 0.25mm;
[0095] (3) Preparation of magnetic powder
[0096] Put the alloy cast sheet obtained in step (2) into a rotary hydrogen explosion furnace for hydrogen crushing treatment to obtain coarsely crushed alloy particles with a particle size of 10-300 μm, and carry out jet mill crushing of the obtained alloy co...
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