| 简介 |
An R-T-B series permanent magnet material, a raw material composition, a preparation method, and an application. The R-T-B series permanent magnet material comprises the following components : R : 29-31.0 wt.%, RH is greater than 1 wt.%, B : 0.905-0.945 wt.%, C : 0.04-0.15 wt.%, N : 0.1-0.4 wt.%, and Fe : 67-69 wt.%, wherein R comprises RL and RH, RL is a light rare earth element, RL comprises Nd, RH is a heavy rare earth element, a (RL1-yRHy)2T17Cx phase is present at the grain boundary of the R-T-B series permanent magnet material, x : 2-3, y : 0.15-0.35, and T must comprise Fe, and also comprises one or more among Co, Ti and N. The permanent magnet material retains relative high Br and Hcj under different heat treatment temperatures. |
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