Neodymium-iron-boron particle continuous composite coating device and neodymium-iron-boron grain boundary depth regulation and control method
A composite coating and NdFeB technology, applied in the application of magnetic film to substrate, inductance/transformer/magnet manufacturing, magnetic materials, etc., to improve the performance of magnets, improve corrosion resistance, and improve the comprehensive utilization efficiency of rare earths.
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Embodiment 1
[0073] 1. Preparation of substrate flakes. Formulate PrNd29.5, Co1, Cu0.1, Al0.2, Ga0.5, Nb0.05, B0.97, Fe67.68 according to the mass ratio of the substrate, and put the ingredients into the crucible of the vacuum quick-setting furnace, and evacuate to 5 *10 -2 Pa, and then filled with argon, when the pressure reaches 35KPa, start high-power heating; set the melting temperature to 1465±5°C, reduce the heating power after refining for 3 minutes, start casting the alloy liquid at the casting temperature of 1460°C, and throw the belt roller The line speed was set at 1.25m / s, and the average thickness of the prepared flakes was 0.21mm, cooled to 40°C and released from the furnace.
[0074] 2. Shake the slices and crush them. The flakes are introduced into the secondary crusher, mechanically pulverized under the protection of nitrogen, the gas pressure and the size of the separator are adjusted, and the average particle size of the particles is controlled at 0.21 mm.
[0075] 3....
Embodiment 2
[0091] 1. Preparation of substrate flakes. Formulate PrNd29, Ho0.3, Dy1, Tb0.5, Co1, Cu0.1, Al0.2, Ga0.5, B0.95, Fe66.45 ingredients according to the mass ratio of the substrate and put them into the crucible of the vacuum quick-setting furnace, pump Vacuum to 5*10 -2 Pa, and then filled with argon, when the pressure reaches 35KPa, start high-power heating; set the melting temperature to 1445±5°C, reduce the heating power after refining for 3 minutes, start casting the alloy liquid at the casting temperature of 1440°C, and throw the belt roller The line speed was set at 1.45m / s, and the average thickness of the prepared flakes was 0.19mm, cooled to 40°C and released from the furnace.
[0092] 2. Shake the slices and crush them. The flakes were introduced into the secondary crusher, mechanically crushed under the protection of nitrogen, the gas pressure and the size of the separator were adjusted, and the average particle size of the particles was controlled at 0.19 mm.
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Embodiment 3
[0109] 1. Preparation of substrate flakes. Formula PrNd29.5, Co1, Cu0.1, Al0.5, Sn0.05, Ga0.5, B0.95, Fe67.4 according to the mass ratio of the base material and put it into the crucible of the vacuum quick-setting furnace, and evacuate to 5* 10 -2 Pa, then filled with argon, when the pressure reaches 35KPa, start high-power heating; set the melting temperature to 1455±5°C, reduce the heating power after refining for 3 minutes, start casting the alloy liquid at the casting temperature of 1450°C, and throw the belt roller The line speed was set at 1.25m / s, and the average thickness of the prepared flakes was 0.22mm, cooled to 40°C and released from the furnace.
[0110] 2. Shake the slices and crush them. The flakes are introduced into the secondary crusher, mechanically crushed under the protection of nitrogen, the gas pressure and the size of the separator are adjusted, and the average particle size of the particles is controlled at 0.22mm.
[0111] 3. Determine the coatin...
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