Preparation method of high temperature resistance radiation orientation or multi-pole orientation neodymium iron boron annular magnet

A radiation orientation, NdFeB technology, used in the manufacture of permanent magnets, magnetic objects, inductors/transformers/magnets, etc., can solve problems such as demagnetization and parts failure

Inactive Publication Date: 2018-06-08
GANZHOU NEW RADIAL MAGNETICS CO LTD GANZHOU CITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors found that the existing NdFeB ring magnets are limited by the performance of the NdFeB permanent magnet material itself, and it

Method used

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  • Preparation method of high temperature resistance radiation orientation or multi-pole orientation neodymium iron boron annular magnet
  • Preparation method of high temperature resistance radiation orientation or multi-pole orientation neodymium iron boron annular magnet

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] In order to improve the high temperature resistance performance of the radiation-oriented or multi-pole-oriented neodymium iron boron toroidal magnet, the embodiment of the present invention provides a method for preparing the high-temperature radiation-oriented or multi-pole-oriented neodymium iron boron toroidal magnet, which specifically includes:

[0030] When preparing the high-temperature radiation-resistant or multi-pole-oriented neodymium-iron-boron toroidal magnet of the embodiment of the present invention, the prepared radiation-oriented or multi-pole-oriented neodymium-iron-boron toroidal magnet can be selected, and then in the radiation orientation or multi-pole orientation The surface of the neodymium iron boron toroidal magnet is coated with a coating material containing heavy rare earth elements, and the radiation-oriented or multi-pole-oriented neodymium iron boron toroidal magnet is infiltrated with heavy rare earth elements, that is, the grain boundary Dif...

Example Embodiment

[0041] Example 1

[0042] Take 9 mechanically processed NdFeB ring magnets of 38SH with radiation orientation and divide them into three groups, three in each group. The first group: vacuum sputtering on the surface of the radiation oriented NdFeB ring magnet A layer of terbium metal coating, the coating weight is 0.5% of the ring weight, the second group: vacuum sputtering a layer of dysprosium metal coating on the surface of the radiation-oriented neodymium iron boron ring magnet, the coating weight is the ring weight The third group: coating a layer of terbium fluoride powder coating on the surface of the radiation-oriented neodymium iron boron ring magnet, and the coating weight is 0.5% of the ring weight. Put the three sets of coated radiation-oriented neodymium iron boron ring magnets into a vacuum infiltration furnace for heavy rare earth element infiltration treatment. The infiltration temperature is 900℃, the infiltration time is 4 hours, and then the aging treatment is ...

Example Embodiment

[0045] Example 2

[0046] Take 9 mechanically processed NdFeB ring magnets of 38SH radiation orientation, and use the same grouping method, the same coating and the same coating method as in Example 1 to process three groups of radiation-oriented NdFeB magnets Boron ring magnet. Put the three sets of coated NdFeB ring magnets into a vacuum infiltration furnace for heavy rare earth element infiltration treatment, with an infiltration temperature of 600°C, an infiltration time of 20 hours, and then an aging treatment, a treatment temperature of 400°C, and a holding time of 20 hours; The radiation-oriented neodymium-iron-boron ring magnet after the aging treatment is gas-quenched, and the surface is coated with epoxy resin to prepare the high-temperature radiation-oriented neodymium-iron-boron ring magnet.

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Abstract

The embodiment of the invention discloses a preparation method for a high temperature resistance radiation orientation or multi-pole orientation neodymium iron boron annular magnet. The method comprises the following steps that the surface of the radiation orientation or multi-pole orientation neodymium iron boron annular magnet is coated with a coating material containing heavy rare earth elements, and heavy rare earth element treatment is performed on the coated neodymium iron boron annular magnet; then, aging treatment is performed; gas quenching treatment is performed on the neodymium ironboron annular magnet obtained after aging treatment; then anti-oxidation treatment is performed on the surface, and the high temperature resistance radiation orientation or multi-pole orientation neodymium iron boron annular magnet is obtained. According to the method, the surface of the neodymium iron boron annular magnet is coated with heavy rare earth elements, permeation treatment is performed, the heavy rare earth elements can permeate the crystal boundary of the neodymium iron boron annular magnet, the intrinsic coercive force of the radiation orientation or multi-pole orientation neodymium iron boron annular magnet is improved, the neodymium iron boron annular magnet is not likely to be demagnetized under the high temperature, and the high temperature resistance of the radiation orientation or multi-pole orientation neodymium iron boron annular magnet is improved.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a method for preparing a high-temperature-resistant radiation-oriented or multi-pole-oriented NdFeB ring magnet. Background technique [0002] A permanent magnet is a magnet that can maintain its magnetism for a long time. It is not easy to lose its magnetism and is widely used in industrial production. NdFeB permanent magnets are based on the intermetallic compound Re 2 Fe 14 B-based permanent magnet material. The main components are rare earth (Re), iron (Fe), boron (B). Among them, the rare earth element neodymium (Nd) can be replaced by other rare earth metals such as dysprosium (Dy) and praseodymium (Pr) in order to obtain different properties, and iron can also be replaced by other metals such as cobalt (Co), aluminum (Al), and copper (Cu). . [0003] NdFeB ring magnet is a ring-shaped NdFeB permanent magnet with multi-level orientation or radial orientation...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F1/057
CPCH01F1/0577H01F41/026H01F41/0293
Inventor 孟佳宏赵帅李伟华
Owner GANZHOU NEW RADIAL MAGNETICS CO LTD GANZHOU CITY
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