| 摘要 |
PROBLEM TO BE SOLVED: To enable an R-Fe-B rare earth permanent magnet material to be more improved in magnet characteristics. SOLUTION: An R-Fe-B rare earth permanent magnet material is composed of 28 to 35 wt.% R (R is one or more elements selected out of Nd, Pr, Dy, Tb and Ho), 0.1 to 3.6 wt.% Co, 0.9 to 1.3 wt.% B, 0.05 to 1.0 wt.% Al, 0.02 to 0.25 wt.% Cu, 0.03 to 0.3 wt.% Ti, 0.03 to 0.1 wt.% C, 0.1 to 0.8 wt.% 0, 0.002 to 0.02 wt.% N, and residual wt.% of Fe and unavoidable impurities. |
