Shock-resistant and corrosion-resistant bonded neodymium-iron-boron magnet and preparation method thereof

A NdFeB, corrosion-type technology, applied in the direction of magnetic objects, inductance/transformer/magnet manufacturing, magnetic materials, etc., can solve the problems that the magnet has no protective layer, the magnet is easy to be corroded, and affects the performance of the magnet, so as to achieve the ratio of raw materials Scientific and reasonable, improve the anti-fall and anti-seismic performance, and improve the effect of mechanical strength

Pending Publication Date: 2021-09-17
安徽恒磁磁电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing magnets have no protective layer outside and are often exposed in a humid environment. The magnets are easily corroded and rust spots often appear, which affects the performance of the magnets

Method used

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  • Shock-resistant and corrosion-resistant bonded neodymium-iron-boron magnet and preparation method thereof
  • Shock-resistant and corrosion-resistant bonded neodymium-iron-boron magnet and preparation method thereof
  • Shock-resistant and corrosion-resistant bonded neodymium-iron-boron magnet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] An anti-shock and corrosion-resistant bonded NdFeB magnet. The main body 2a of the magnet is made of the following raw materials in parts by weight: 95.5 parts of NdFeB magnetic powder, 1.8 parts of thermosetting adhesive, 0.5 part of coupling agent, and lubricant 0.4 parts, 0.4 parts of curing agent, 0.8 parts of accelerator, and 0.6 parts of reinforcing agent; the corrosion-resistant coating 2c is made of the following raw materials in parts by weight: 75-85 parts of aluminum, 8-20 parts of copper, rare earth 1 to 2 parts, 0.1 to 0.5 parts of bismuth.

[0039] In this embodiment, a method for preparing an anti-seismic and corrosion-resistant bonded NdFeB magnet, the steps are as follows:

[0040] Step 1: Take a certain amount of NdFeB magnetic powder and thermosetting binder respectively, under the protection of an inert gas such as nitrogen or argon, use a planetary mixer or other mixing equipment to stir and mix, mix evenly for 15-60 minutes, and obtain the pre- Mi...

Embodiment 2

[0049] An anti-shock and corrosion-resistant bonded NdFeB magnet, the magnet main body 2a is made of the following component raw materials in parts by weight: 95 parts of NdFeB magnetic powder, 1.9 parts of thermosetting binder, 0.6 part of coupling agent, lubricant 0.5 parts, 0.5 parts of curing agent, 0.9 parts of accelerator, and 0.6 parts of reinforcing agent; the corrosion-resistant coating 2c is made of the following components by weight: 75-85 parts of aluminum, 8-20 parts of copper, rare earth 1 to 2 parts, 0.1 to 0.5 parts of bismuth.

[0050] In this embodiment, a method for preparing an anti-seismic and corrosion-resistant bonded NdFeB magnet, the steps are as follows:

[0051] Step 1: Take a certain amount of NdFeB magnetic powder and thermosetting binder respectively, under the protection of an inert gas such as nitrogen or argon, use a planetary mixer or other mixing equipment to stir and mix, mix evenly for 15-60 minutes, and obtain the pre- Mixture;

[0052] ...

Embodiment 3

[0060] An anti-seismic and corrosion-resistant bonded NdFeB magnet. The main body 2a of the magnet is made of the following raw materials in parts by weight: 95 parts of NdFeB magnetic powder, 1.8 parts of thermosetting adhesive, 0.6 part of coupling agent, lubricant 0.5 parts, 0.5 parts of curing agent, 0.8 parts of accelerator, and 0.7 parts of reinforcing agent; the corrosion-resistant coating 2c is made of the following components by weight: 75-85 parts of aluminum, 8-20 parts of copper, rare earth 1 to 2 parts, 0.1 to 0.5 parts of bismuth.

[0061] In this embodiment, a method for preparing an anti-seismic and corrosion-resistant bonded NdFeB magnet, the steps are as follows:

[0062] Step 1: Take a certain amount of NdFeB magnetic powder and thermosetting binder respectively, under the protection of an inert gas such as nitrogen or argon, use a planetary mixer or other mixing equipment to stir and mix, mix evenly for 15-60 minutes, and obtain the pre- Mixture;

[0063]...

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Abstract

The invention provides a shock-resistant and corrosion-resistant bonded neodymium-iron-boron magnet and a preparation method thereof, belongs to the technical field of bonded neodymium-iron-boron magnets, and is used for solving the problems that an existing bonded neodymium-iron-boron magnet is low in production efficiency and poor in corrosion-resistant, shock-resistant and drop-resistant effects. The shock-resistant and corrosion-resistant bonded neodymium-iron-boron magnet comprises a base shell and an upper cover plate; a placement area is arranged in the base shell; a magnet is arranged in the placement area; an outer edge groove and an inner edge groove are formed in the inner side and the outer side of the placement area; clamping annular areas are formed between the magnet and the outer edge groove and between the magnet and the inner edge groove respectively; the lower end of the upper cover plate is provided with an outer insertion ring and an inner insertion ring; the outer insertion ring and the inner insertion ring are inserted into the corresponding clamping annular areas; the magnet comprises a magnet body; and the surface of the magnet body is sequentially provided with an electroplated phosphorus layer, a corrosion-resistant coating and a vapor deposition film layer from inside to outside. The raw materials are scientific and reasonable in proportion, the strength is high, and the magnetism is good; the electroplated phosphorus layer, the corrosion-resistant coating and the vapor deposition film layer wrap the surface of the magnet body, and thus corrosion resistance is achieved; and the base shell and the upper cover plate are matched to wrap the magnet, and falling and vibration are resisted.

Description

technical field [0001] The invention belongs to the technical field of bonded NdFeB magnets, and relates to an anti-seismic and corrosion-resistant bonded NdFeB magnet and a preparation method thereof. Background technique [0002] Bonded magnets appeared around the 1970s, when SmCo had reached commercialization. The market situation of sintered permanent magnets is very good, but it is difficult to precisely process them into special shapes, and problems such as cracking, damage, edge drop, and corner drop are prone to occur during processing, and they are not easy to assemble, which limits their application. To solve this problem, the permanent magnet is crushed, mixed with plastic, and pressed in a magnetic field. This is probably the most primitive manufacturing method of bonded magnets. Bonded NdFeB magnets have been widely used due to the advantages of low cost, high dimensional accuracy, large degree of shape freedom, good mechanical strength, and light specific grav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F41/02
CPCH01F1/0571H01F1/0576H01F41/02
Inventor 关传海杨友文潘勤关世昊张恩华陈雪奇李如福高洁韩谋智
Owner 安徽恒磁磁电有限公司
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