NEODYMIUM-IRON-BORON MAGNET MATERIAL, RAW MATERIAL COMPOSITION, PREPARATION METHOD, AND APPLICATION

摘要

Disclosed in the present invention are a neodymium-iron-boron magnet material, a raw material composition, a preparation method, and an application. The raw material composition of a neodymium-iron-boron magnet material I contains: R: 29.5-32.5 wt%, R being a rare-earth element and comprising rare-earth metal R1 for smelting and rare-earth metal R2 for grain boundary diffusion, the content of R2 being 0.2-1 wt%, R1 comprising Nd, Ho, and Gd and not comprising Dy and/or Tb, and R2 comprising Dy and/or Tb; Co: 0-0.5 wt%; B: 0.9-1.05 wt%; Cu: 0-0.35 wt%, not covering 0; Ga: 0-0.35 wt%, not covering 0; AI: 0-0.5 wt%; X: 0.05-0.45 wt%, X comprising one or more of Ti, Nb, Zr, Hf, V, Mo, W, Ta, and Cr; and Fe: 66-70 wt%. The magnet material has high grain boundary continuity and good magnetic properties.