The method for preparation of R-Fe-B type rare earth magnet powder for bonded magnet, R-Fe-B type rare earth magnet powder thereby and method for preparation of bonded magnet using the magnet powder, bonded magnet thereby

摘要

This invention relates to a method of producing R-Fe-B rare earth magnetic powders for bonded magnet, thereby producing The method of manufacturing a magnetic powder and a bonded magnet using the magnetic powder, this in detail relates to a bonded magnet manufactured by the steps of grinding the raw material of the rare earth sintered magnet product (step 1); The pulverized product produced through the first step in a vacuum tube (tube furnace) to increase the temperature of the hydrogenation process step in filling the hydrogen was charged to the tube (step 2); Phase to further increase the temperature in the same hydrogen atmosphere and in the second step tube cracking process step (step 3); Discharge of exhaust hydrogen from the hydrogen in the inner tube of the 3 stage process step (step 4); And the hydrogen pressure in the vacuum exhaust recombining process step (5) of the magnetic properties comprising the improved R-Fe-B rare earth magnetic powder manufacturing method, and whereby the tube after performing the step 4 method for producing a bonded magnet manufactured using the magnetic powder and the magnetic powder, thereby providing a bonded magnet is manufactured. Through the present invention, the size is fine and uniform composition can be prepared by preparing a magnetic powder, the magnetic properties are improved, the advantages in the price aspect and environmental point of view of cost by recycling the waste scrap. ;