Industrial cryogenic production method for neodymium, iron and boron nano-crystalline quick-quenched permanent-magnetic powder
A production method and NdFeB technology are applied in the industrial cryogenic production field of NdFeB nanocrystalline fast quenching permanent magnet powder, which can solve the problems of slow linear speed of rollers and achieve the effect of performance improvement.
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[0015] An industrial cryogenic production method of NdFeB nanocrystalline quick-quenching permanent magnet powder, comprising a production process of batch smelting, ingot crushing, vacuum quick-quenching, magnetic crushing, crystallization heat treatment, fine crushing, and magnetic property testing.
[0016] The vacuum quick quenching furnace used in the present invention is the advanced equipment of the same kind in China. The quick quenching method is the arc remelting overflow type. The quick quenching metal liquid passes through the molybdenum belt pulley at a linear speed of 21.5 meters per second. The barrel is cooled with normal temperature water and the material is recycled. The cooling water of the molybdenum pulley at the key part is changed from normal temperature water to low temperature water. The water temperature is around 0°C and recycled to maintain a constant temperature. The specific method is to use a 5kw refrigerator to connect a 5 cubic meter water tank ...
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