ALLOY FOR R-T-B-BASED RARE EARTH SINTERED MAGNET, PROCESS FOR PRODUCING ALLOY FOR R-T-B-BASED RARE EARTH SINTERED MAGNET, ALLOY MATERIAL FOR R-T-B-BASED RARE EARTH SINTERED MAGNET, R-T-B-BASED RARE EARTH SINTERED MAGNET, PROCESS FOR PRODUCING R-T-B-B

摘要

Provided is an alloy for an R-T-B-based rare earth sintered magnet. The alloy makes it possible without enhancing the Dy content of the alloy to produce an R-T-B-based rare earth sintered magnet having a high coercive force. The alloy is characterized by: consisting of one or more rare earth elements (R), a transition metal component (T) comprising Fe as the essential element, a metal element component (M) comprising one or more metals selected from among Al, Ga and Cu, B and unavoidable impurities; having an R content of 13 to 15 at%, a B content of 4.5 to 6.2 at% and an M content of 0.1 to 2.4 at%, with the balance being T; having a content of Dy in the rare earth elements of 0 to 65 at%; and satisfying the relationship (1) 0.0049Dy + 0.34 = B/TRE = 0.0049Dy + 0.36 [wherein Dy is the concentration of Dy element (in at%), B is the concentration of boron element (in at%), and TRE is the total concentration of rare earth elements (in at%)].