Method for improving consistency of grain boundary diffusion magnetic properties of neodymium-iron-boron magnet

A kind of grain boundary diffusion, NdFeB technology, applied in the direction of magnetic materials, magnetic objects, inductors/transformers/magnets, etc., can solve the problem that the magnetic properties cannot be kept consistent, so as to solve the difference in magnetic properties and avoid sudden rise Dips, the effect of ensuring consistency

Inactive Publication Date: 2020-11-20
GANZHOU FORTUNE ELECTRONICS
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for improving the consistency of the magnetic properties of the NdFeB magnet grain boundary diffusion, which has the advantages of maintaining the consistency of the magnetic properties, and solves the problem that the magnetic properties cannot be kept consistent

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  • Method for improving consistency of grain boundary diffusion magnetic properties of neodymium-iron-boron magnet
  • Method for improving consistency of grain boundary diffusion magnetic properties of neodymium-iron-boron magnet
  • Method for improving consistency of grain boundary diffusion magnetic properties of neodymium-iron-boron magnet

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Embodiment 1

[0039] A method for improving the uniformity of magnetic properties of NdFeB magnet grain boundary diffusion, comprising the following steps:

[0040] S1. Raw material selection

[0041]First of all, the appropriate amount of rare earths is selected. After selecting the rare earths, the amount of small metals is selected according to the ratio according to the number of selected rare earths. After the selection, the rare earths are put into the airflow mill, and the airflow mill is carried out for 20 minutes. After the airflow mill The final rare earth passes through a 20-mesh filter screen to obtain fine rare earth. At the same time, the obtained small metal is put into the jaw crusher, and the jaw crusher runs for 10 minutes to obtain a coarse powder-like small metal powder. Put the small metal powder into the jet mill, and the jet mill runs for 20 minutes to obtain fine small metal powder. The ratio of rare earth and small metal is 3:1, and the rare earth material is Nd-Pr ...

Embodiment 2

[0055] A method for improving the uniformity of magnetic properties of NdFeB magnet grain boundary diffusion, comprising the following steps:

[0056] S1. Raw material selection

[0057] First of all, the appropriate amount of rare earths is selected. After selecting the rare earths, the amount of small metals is selected according to the ratio according to the number of selected rare earths. After the selection, the rare earths are put into the airflow mill, and the airflow mill is carried out for 20 minutes. After the airflow mill The final rare earth passes through a 20-mesh filter screen to obtain fine rare earth. At the same time, the obtained small metal is put into the jaw crusher, and the jaw crusher runs for 10 minutes to obtain a coarse powder-like small metal powder. Put the small metal powder into the jet mill, and run the jet mill for 20 to 30 minutes to obtain fine small metal powder. The ratio of rare earth and small metal is 3:1, and the rare earth materials ar...

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Abstract

The invention discloses a method for improving consistency of grain boundary diffusion magnetic properties of a neodymium-iron-boron magnet. The method comprises the following steps: raw materials are selected, firstly, a proper amount of rare earth is selected; after the rare earth is selected, the quantity of the small metals is selected according to the proportion and the quantity of the selected rare earth; and after selection is completed, the rare earth is put into an airflow mill to be subjected to airflow milling for 20-30 min, the rare earth obtained after airflow milling passes through a 20-50-mesh filter screen, fine rare earth is obtained, meanwhile, the obtained small metal is put into a jaw crusher, the jaw crusher operates for 10-20 min, and small metal powder in a coarse powder state is obtained. According to the method, the raw materials are selected according to the equal proportion in the selecting process, the obtained raw materials are finely ground in advance inthe smelting process, it can be guaranteed that the internal components of the neodymium-iron-boron alloy obtained in the later smelting process are compact, and it is guaranteed that the internal magnetism of the neodymium-iron-boron magnet is kept consistent in the later quenching process.

Description

technical field [0001] The invention relates to the technical field of the uniformity of magnetic properties of NdFeB magnet grain boundary diffusion, in particular to a method for improving the consistency of magnetic properties of NdFeB magnet grain boundary diffusion. Background technique [0002] NdFeB magnets (Nd 2 Fe 14 B) The consistency of magnetic properties of permanent magnet materials directly affects the consistency of devices produced with it, so it is a matter of great concern to users and producers. High-tech fields such as computers, communications, and aerospace have particularly strict requirements on the consistency of permanent magnet materials. Although Nd 2 Fe 14 B permanent magnet materials have been widely used in many fields due to their high magnetic energy product, but the magnetic properties-consistency has not been well resolved. The specific performance is: not only the sintered Nd of different batches of the same grade 2 Fe 14 The magne...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H01F41/02H01F1/057
CPCH01F1/0577H01F41/0266
Inventor庞再升喻玺钟春燕钟长传
OwnerGANZHOU FORTUNE ELECTRONICS