COMPOSITE R-Fe-B SERIES RARE EARTH SINTERED MAGNET CONTAINING Pr AND W

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Disclosed in the present invention is a composite R-Fe-B based rare-earth sintered magnet comprising Pr and W, wherein the rare-earth sintered magnet comprises an R2Fe14B type main phase, and R is a rare-earth element comprising at least Pr, wherein the raw material components therein comprise more than or equal to 2 wt% of Pr and 0.0005 wt%-0.03 wt% of W; and the rare-earth sintered magnet is made through a process comprising the following steps : preparing molten liquid of the raw material components into a rapidly quenched alloy; grinding the rapidly quenched alloy into fine powder; obtaining a shaped body from the fine powder by using a magnetic field; and sintering the shaped body. By adding a trace amount of W into the rare-earth sintered magnet, the heat resistance and thermal demagnetization performance of the Pr-containing magnet are improved.