METHOD FOR MANUFACTURING AN R-Fe-B RARE EARTH SINTERED MAGNET CAPABLE OF REDUCING THE CONTENT OF RARE EARTH ELEMENTS IN THE SINTERED MAGNET

摘要

PURPOSE: A method for manufacturing an R-Fe-B rare earth sintered magnet is provided to improve coercive force of the sintered magnet by improving a thermal treatment process for the sintered magnet and a hydrogen treatment process for R-Fe-B magnet powder.;CONSTITUTION: An alloy strip is manufactured(S110). A hydrogen treatment process is performed at a hydrogen treatment temperature within 350 to 450°C for the alloy strip(S120). A dehydrogenation treatment process is performed for the alloy strip(S130). Magnet powder is formed by shattering the alloy strip(S140). The magnet powder is sintered(S200). A thermal treatment process is performed for the sintered magnet(S300).;COPYRIGHT KIPO 2013;[Reference numerals] (S110) Manufacturing an alloy strip; (S120) Performing a hydrogen treatment at a hydrogen treatment temperature within 350 to 450°C for the alloy strip; (S130) Performing a dehydrogenation treatment process for the alloy strip; (S140) Grinding the alloy strip; (S200) Sintering the magnet powder; (S300) Thermally processing a sintering magnet