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首页> 外文期刊>IEEE Transactions on Magnetics >Anisotropic Consolidation Behavior of Isotropic Nd–Fe–B HDDR Powders During Hot-Deformation
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Anisotropic Consolidation Behavior of Isotropic Nd–Fe–B HDDR Powders During Hot-Deformation

机译：各向同性Nd–Fe–B HDDR粉末在热变形过程中的各向异性固结行为

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摘要

In this paper, the anisotropic consolidation behavior of isotropic Nd-Fe-B HDDR powders has been studied as a function of the strain, strain rate, and processing temperature. The compacts, produced by hot-pressing at 700 °C under 400 MPa in vacuum, were subjected to die-upsetting at 700 °C and 800 °C with different deformation conditions of strain rate 0.01-0.001 s-1 and strain 0.5-1.5. After die-upset, the coercivity and remanence decreased and increased with increasing strain, respectively, with the change of grain morphology from the sphere to platelet. And the high deformation temperature and slow deformation rate reduce the coercivity further. The coercivity of die-upset magnet, produced at 700 °C with a strain of 1.4 and a strain rate of 0.001 s-1, was largely increased about 2 kOe after post-annealing at 800 °C. The maximum coercivity, remanence, and (BH)max were 10.4 kOe, 12.4 kG, and 35.6 MGOe, respectively.
机译：在本文中，研究了各向同性的Nd-Fe-B HDDR粉末的各向异性固结行为与应变，应变速率和加工温度的关系。在700℃，400 MPa的真空条件下热压生产的压块，在700℃和800℃的应变速率为0.01-0.001 s -1的不同变形条件下进行模锻。 sup>和应变0.5-1.5。模锻后，矫顽力和剩磁分别随着应变的增加而降低和增加，随晶粒形态从球体到血小板的变化而变化。高变形温度和低变形速率进一步降低了矫顽力。在700°C的温度下进行退火后，于700°C产生的应变为1.4，应变速率为0.001 s -1 的矫顽磁体的矫顽力大大提高了。最大矫顽力，剩磁和（BH）max分别为10.4 kOe，12.4 kG和35.6 MGOe。

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