METHOD FOR MANUFACTURING RARE EARTH SINTERED MAGNET

[Solution] R 1 2 T14X composition (R 1 is at least one type of rare earth element and Pr and / or nd is mandatory, T is at least one type of Fe, Co, Al, Ga, Cu and Fe is mandatory, X is boron and / or carbon) The process of obtaining R1 -T-X based sintering in which the main gravity, alloys containing R2, M and B (R 2is at least one type of rare earth element and Dy and / or Tb are mandatory, M comprises the process of obtaining a powder of at least 1 type of Fe, Cu, Al, Co, Mn, Ni, Sn, Si, B is boron), the process of presenting the alloy powder on the surface of the sintering body, the process of heating the alloy powder and the sintering agent, and the alloy comprises R2 of 5 to 60at%, 5 to 70at% M, 20at% and less than 70at% B. [Effect] It is possible to increase the coercivity while inhibiting the decrease in the residual flux density by the granular diffusion treatment, and the rare earth sintering magnet compatible with the high residual flux density and the high coercivity can be manufactured productively.