热变形温度对铸造-热变形(Nd,Pr)13Fe80Nb1B6永磁合金织构形成的影响

摘要

In this paper, the effects of hot deformation temperatures on texture formation of cast-hot deformed (Nd,Pr)13FegoNbiB6 alloy were studied. In the deformation temperature range of 700 to 820 ℃, only the (006) texture of (Nd,Pr)13Fe8oNb1B6 with low rare earth content can be obtained at deformation temperature of 700℃. The boundaries of most of the plate grains are perpendicular to the pressing direction, and most of magnetic domain waits are parallel to the direction. The hot deformation mechanism of rare earth-iron-boron permanent magnets and the effects of RE-rich phase on the deformation are to be researched. And obtaining (006) texture of (Nd,Pr)13Fe8oNb1B6,with less rare earth content, hot-deformed at lower temperature of 700 ℃ is of engineering significance.%采用铸造-热变形方法制备了(Nd,Pr) 13Fe80Nb1B6永磁合金,研究了热变形温度对合金织构形成的影响,在700～820℃的范围内,随着热变形温度的升高,在垂直压力的平面内难以形成以(006)为主峰的衍射谱,而在700℃热变形时,得到(006)织构,磁畴观察表明沿压力方向的平面内片形畴与压力方向平行.钕铁硼热变形机制和富稀土相的作用还有待进一步研究.低稀土含量的钕铁硼铸锭在低的热变形温度下获得磁织构在工程上具有积极的意义.