Method for producing a high-performance neodymium-iron-boron rare earth permanent magnetic material

摘要

In the method for producing a high-performance neodymium-iron-boron rare earth permanent magnetic material of the present invention, the degree of alignment of the magnet can be improved by preparing the pre-sintered alloy material, the particle size of the powder ground by the jet mill can be refined and the fine powder in the filter of the jet mill can be mixed with the powder collected by the cyclone collector by controlling the oxygen content of the jet mill and adding the nanoscale oxide fine powder. The present invention can significantly improve the utilization ratio of the material and the performance of the magnet, save the use of the rare earth, and especially the heavy rare earth, thereby protecting the scare resources.

主权项

1. A method for producing a high-performance neodymium-iron-boron rare earth permanent magnetic material, characterized by firstly preparing a pre-sintered alloy material by alloy melting, coarsely pulverization, jet mill powder production, magnetic compaction, and sintering process, and then secondarily hydrogen pulverizing the pre-sintered alloy material, evenly mixing the hydrogen pulverized pre-sintered alloy material with one or more fine powders selected from the group consisting of nanoscale lanthanum oxide, yttrium oxide, iron oxide and titanium oxide, and then secondarily powder producing, secondarily magnetic compacting, secondarily sintering, machining and aging for producing the neodymium-iron-boron permanent magnetic material.