论文部分内容阅读
测量和分析了热压热变形各向异性纳米晶Nd-Fe-B磁体磁取向度I、整个磁体的易磁化轴与热变形压力方向的夹角α,磁体密度ρ,主相体积百分数1-β,磁化强度的关系,拟合出2和5 T充磁磁场时具有不同磁取向度热变形磁体的磁化强度分别为M S2=(1-β)M ST0ρ/ρ0(1-0.35108/I2+0.18622/I4)和M S5=(1-β)M ST0ρ/ρ0(1-0.19326/I2+0.09545/I4),并与已有相关文献的实验数据的测量值进行了计算比对,发现2和5 T充磁场时的计算值与实测值的误差分别在9.05%和0.89%。在1123~1163 K范围热变形,钕铁硼磁体的磁取向度、2和5 T时磁化强度均是先增加后减小,在1148 K时达到最大值1.894,1.337和1.386 T。消除热变形粗晶粒带和晶粒混乱区,将提高热变形磁体的磁取向度和磁化强度。
The magnetic orientation I of anisotropic nanocrystalline Nd-Fe-B magnet in hot-pressing and thermal deformation was measured and analyzed. The angle α between the easy-magnetization axis of the entire magnet and the direction of the hot deformation pressure, the density of the magnet ρ, β, and magnetization. The magnetization intensities of the magnets with different magnetic orientations after fitting the magnetic field of 2 and 5 T are M S2 = (1-β) M ST0ρ / ρ0 (1-0.35108 / I2 + 0.18622 / I4) and M S5 = (1-β) M ST0ρ / ρ0 (1-0.19326 / I2 + 0.09545 / I4), and compared with the measured data of the existing literature, we found that 2 and The errors of the calculated value and the measured value of 5 T charge field are 9.05% and 0.89% respectively. In the range of 1123 ~ 1163 K, the magnetic orientation of NdFeB magnets increases first and then decreases at 2 and 5 T, reaching the maximum values of 1.894, 1.377 and 1.386 at 1148K. Eliminating the hot-deformed coarse grain zone and the grain confusion zone will increase the degree of magnetic orientation and the magnetization of the hot deformed magnet.