Radiation magnetic field sintered rare-earth permanent magnetic tile and its magnetic processing method

A technology of rare earth permanent magnet and magnetization method, which is applied in the field of permanent magnet tiles and its magnetic treatment, can solve the problems of permanent magnet material magnetic energy not being utilized, and achieve the effect of high yield and high density

Inactive Publication Date: 2005-03-02
HEYE SPECIAL STEEL +1
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Problems solved by technology

Therefore, its disadvantage is that although the shape is tile-shaped, the magnetic domain arrangement is still parallel, and the magnetic field direction is still parallel after magnetization.
The radiator normal N and the magnetic field H often have an included angle θ (θ = 0 ~ 90°, cosθ = 1 ~ 0), so that the magnetic energy of the permanent magnet material can not get a higher utilization rate

Method used

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  • Radiation magnetic field sintered rare-earth permanent magnetic tile and its magnetic processing method
  • Radiation magnetic field sintered rare-earth permanent magnetic tile and its magnetic processing method
  • Radiation magnetic field sintered rare-earth permanent magnetic tile and its magnetic processing method

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Embodiment Construction

[0033] Please refer to Figure 4 Magnetic field distribution and Figure 5 The outline drawing of the radiation magnetic field sintered rare earth permanent magnet tile. The section shape of the radiation magnetic field sintered rare earth permanent magnet tile is fan-shaped, and the inner and outer arcs are concentric circles. The direction of the magnetic field is radial radial, H represents the direction of the magnetic field, and N represents the normal direction of the radiator, and the two coincide.

[0034] The radiated magnetic field sintered rare earth permanent magnet tile is made by anisotropic rare earth permanent magnet powder formed in a magnetic field and then sintered and magnetized.

[0035] The forming and magnetizing methods of the radiation magnetic field sintered rare earth permanent magnet tile in the magnetic field are as follows:

[0036] 1 The material is anisotropic rare earth permanent magnet powder, and the particle size is ground to 2-6 μm;

[0...

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Abstract

The present invention relates to one kind of radiative magnetic field sintered RE permanent magnetic tile and its magnetic treating process. The tile has sector cross section and concentric inner and outer arc, and radial magnetic field. The magnetic treating process of formation and magnetization inside magnetic field includes the following steps: adopting anisotropic permanent magnet powder of granularity of 2-6 microns; filling the powder into forming cavity; applying parallel magnetic field of magnetic induction 1.0-2.0 T to form radial magnetic field in the forming mold; applying pressure of 20-100 MPa in the direction perpendicular to the magnetic field and maintaining for 2-60 sec; forming the blank tile; and magnetizing the blank tile in radial magnetic field or parallel magnetic field to produce the RE permanent magnetic tile. The magnetically treated RE permanent magnetic tile has obviously higher magnetic energy utilization rate.

Description

technical field [0001] The invention relates to a permanent magnet tile and a magnetic treatment method thereof, in particular to a radiation magnetic field sintered rare earth permanent magnet tile and a magnetic treatment method thereof. Background technique [0002] At present, rare earth permanent magnet materials such as sintered NdFeB have high magnetic properties, and their permanent magnet materials are used in many fields. The tile-shaped permanent magnet material is mainly used in permanent magnet rotors or stators with rotating bodies such as motors and generators. The existing manufacturing method of sintered NdFeB rare earth permanent magnet tile is to first make a cuboid permanent magnet with parallel magnetic field by powder metallurgy, and then process it into a "magnetic tile" with a fan-shaped cross section by wire cutting and other methods, and then Magnetized under parallel magnetic field. Therefore, its disadvantage is that although the shape is tile-s...

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Application Information

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IPC IPC(8): C04B35/50C04B35/64
Inventor 于旭光张荣斌田藏韬杨文义
Owner HEYE SPECIAL STEEL
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