论文部分内容阅读
本文研究了廉价高性能富Nd混合稀土MR-Fe-B永磁合金的成分及其工艺因素对磁性能的影响。确定了这种铁基稀土永磁合金的最佳成分及最佳工艺制度。该永磁合金磁性能达到:B_r=1.15—1.28T(11.5—12.8 kGs),i~Hc=573—796kA/m(7.2-10.0kOe);(BH)_(max)=247—270kJ/m~3(31—34MGOe),在20—100℃范围内开路磁通可逆温度系数为-0.098%/℃,居里温度T_c=310℃,维氏硬度HV≥520。对其高矫顽力的机制进行了探讨,认为烧结态磁体的矫顽力主要来源于富 MR相的作用,而后烧态磁体的矫顽力的提高主要是反磁化校数目减少的缘故。
In this paper, the effects of the composition of low-cost and high-performance Nd-rich rare earth MR-Fe-B permanent magnet alloys and their processing factors on the magnetic properties were investigated. Determine the best composition of iron-based rare earth permanent magnet alloy and the best process system. The permanent magnet alloy has the following magnetic properties: B_r = 1.15-1.28T (11.5-12.8 kGs), i ~ Hc = 573-796 kA / m (7.2-10.0 kOe); (BH) max = 247-270 kJ / m ~ 3 (31-34MGOe). The reversible temperature coefficient of open flux in the range of 20-100 ℃ is -0.098% / ℃, Curie temperature T_c = 310 ℃ and Vickers hardness HV≥520. The mechanism of high coercivity is discussed. It is considered that the coercive force of the sintered magnet mainly comes from the effect of MR-rich phase. The increase of the coercive force of the sintered magnet is mainly due to the decrease of the number of diamagnetic calibration.