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High performance radial hot pressing magnet ring and preparation method thereof

A high-performance, magnetic ring technology, applied in the manufacture of inductors/transformers/magnets, magnetic materials, magnetic objects, etc., can solve the problems of increasing oxygen content and reducing the performance of anisotropic magnets, achieving low oxygen content, inhibiting cracking, The effect of reducing drag

Active Publication Date: 2008-06-18
CENT IRON & STEEL RES INST +1
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  • Abstract
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  • Claims
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Problems solved by technology

However, this method fails to completely isolate the alloy material from the air, and it is easy to increase the oxygen content in the magnet during the hot pressing process at a higher temperature (700 ° C ~ 900 ° C), thereby reducing the performance of the anisotropic magnet , its maximum energy product is about 20-30MGOe

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  • High performance radial hot pressing magnet ring and preparation method thereof
  • High performance radial hot pressing magnet ring and preparation method thereof
  • High performance radial hot pressing magnet ring and preparation method thereof

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Embodiment Construction

[0053] Table 1 is the specific chemical composition of the high-performance hot-pressed ring of the present invention; Table 2 is the preparation process of the high-performance hot-pressed ring of the present invention; Table 3 is the magnetic properties and oxygen content of the hot-pressed ring of the embodiment of the present invention measured by VSM And the performance comparison of the existing technology.

[0054] Table 1: Chemical composition (at%) of the high-performance hot-pressed ring of the embodiment of the present invention

[0055]

[0056] Table 2: Hot pressing / thermal deformation process of the high-performance hot pressing ring according to the embodiment of the present invention

[0057]

[0058] Table 3: Magnetic properties of the high-performance hot-pressed ring of the embodiment of the present invention

[0059]

[0060] Note: In the embodiment, 1(1)+2(2) refers to the combination of the component (1) in Table 1 and the process (2) in Table 2...

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Abstract

The invention relates to a radial heat-pressing magnetic ring with high performance and the manufacturing method thereof. After a thin belt manufactured by quick quenching is broken, the thin belt is pressed under a high temperature between 600 DEG C and 800 DEG C into an overall density isotropy magnet, and the magnet is extruded into a ring shape by a floating double-direction pressing process at the temperature of 700 DEG C to 900 DEG C. The direction selection of the heat pressing ring is a radial direction selection, and a crystal granule size can be 500nm to a max extent; wherein, the two-step heat pressing processes are all carried out in a high vacuum condition or a condition that argon gas is filled for protection after the high vacuum is realized. The magnetic ring obtained through the invention has low oxygen content, thus the magnetic ring has relatively high magnetic property. And the floating double-direction pressing can reduce plastic rheological resistance so as to lead the magnetic ring to be provided with a higher magnetism and consistency and a crack of the magnetic ring can be effectively restrained.

Description

technical field [0001] The invention belongs to the field of manufacture of rare earth permanent magnet materials, and is particularly suitable for a high-performance radial thermocompression magnetic ring and a preparation method thereof. technical background [0002] At present, there are many ways to use permanent magnets to prepare radial rings. For example, permanent magnets are spliced ​​and bonded to form permanent magnet rings. The radial rings prepared by this method have uneven magnetic field at the splicing point; there are also isotropic magnetic powders. Bonded into a radial ring, this magnetic ring is isotropic and has a low density, so the magnetic performance is low, and the magnetic energy product ranges from 6 to 10 MGOe. Chinese patent ZL88103837 (application date: 1988.07.16) discloses a "radially oriented neodymium-iron-boron permanent magnet ring and its manufacturing method", which adopts powder metallurgy technology to prepare rare earth permanent mag...

Claims

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Application Information

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IPC IPC(8): H01F7/02H01F1/057H01F1/08H01F41/02
Inventor 李卫王会杰林旻闫阿儒陈仁杰刘兴民李安华潘伟
Owner CENT IRON & STEEL RES INST
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