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A wear-resistant Nd-Fe-B permanent magnet material for new energy vehicles and a preparation method thereof

A technology for new energy vehicles and permanent magnet materials, which is applied in the field of wear-resistant NdFeB permanent magnet materials and its preparation, and can solve problems such as high brittleness, impact resistance, and poor heat resistance

Inactive Publication Date: 2019-01-11
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems of high brittleness, poor impact resistance and poor heat resistance of the coating of the existing NdFeB magnetic material for automobiles, the present invention proposes a wear-resistant NdFeB permanent magnet material for new energy vehicles and its preparation method

Method used

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  • A wear-resistant Nd-Fe-B permanent magnet material for new energy vehicles and a preparation method thereof

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Effect test

Embodiment 1

[0027] A method for preparing a wear-resistant NdFeB permanent magnet material for new energy vehicles, comprising the following steps:

[0028] S1. Grind kaolin into powder and pass through a 450-mesh sieve, bake at 75°C for 45 minutes, add pure water, stir at 90°C for 30 minutes, then add tributyl phosphate, cool to 70°C, Stir and mix for 2.5 hours, dry, and regrind to obtain modified kaolin powder; the mass ratio of the kaolin powder, purified water, and tributyl phosphate is 5:10:1;

[0029]S2. Sintering and cleaning the NdFeB magnetic material, placing it in the electrophoresis tank for cathodic electrophoresis coating treatment, the voltage is 70V, and the time is 10min; the bath liquid of the electrophoresis tank is made of polyurethane resin, silicone modified epoxy Resin, color glue, organic solvent and the colloidal solution configuration of the modified kaolin powder prepared in step S1 constitute; the mass ratio of the polyurethane resin, organosilicon modified epo...

Embodiment 2

[0033] A method for preparing a wear-resistant NdFeB permanent magnet material for new energy vehicles, comprising the following steps:

[0034] S1. Grind kaolin into powder and pass through a 420 mesh sieve, bake at 66°C for 30 minutes, add pure water, stir at 85°C for 20 minutes, then add tributyl phosphate, cool to 62°C, Stir and mix for 2 hours, dry, and regrind to obtain modified kaolin powder; the mass ratio of the kaolin powder, purified water, and tributyl phosphate is 5:10:1;

[0035] S2. Sintering and cleaning the NdFeB magnetic material, placing it in the electrophoresis tank for cathodic electrophoresis coating treatment, the voltage is 55V, and the time is 6min; the bath liquid of the electrophoresis tank is made of polyurethane resin, silicone modified epoxy Resin, color glue, organic solvent and the colloidal solution configuration of the modified kaolin powder prepared in step S1 constitute; the mass ratio of the polyurethane resin, organosilicon modified epoxy...

Embodiment 3

[0039] A method for preparing a wear-resistant NdFeB permanent magnet material for new energy vehicles, comprising the following steps:

[0040] S1. Grind kaolin into powder and pass through a 500-mesh sieve, bake at 85°C for 50 minutes, add pure water, stir at 90°C for 35 minutes, then add tributyl phosphate, cool to 75°C, Stir and mix for 2.5 hours, dry, and regrind to obtain modified kaolin powder; the mass ratio of the kaolin powder, purified water, and tributyl phosphate is 5:10:1;

[0041] S2. Sintering and cleaning the NdFeB magnetic material, placing it in the electrophoresis tank for cathodic electrophoresis coating treatment, the voltage is 80V, and the time is 15min; the bath liquid of the electrophoresis tank is made of polyurethane resin, silicone modified epoxy Resin, color glue, organic solvent and the colloidal solution configuration of the modified kaolin powder prepared in step S1 constitute; the mass ratio of the polyurethane resin, organosilicon modified ep...

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Abstract

The invention belongs to the technical field of preparation of permanent magnet materials, in particular to a wear-resistant NdFeB permanent magnet material for new energy vehicles and a preparation method thereof. The invention is composed of composite material mixed with polyurethane resin, organosilicon modified epoxy resin and modified kaolin powder, which is coated on the outer surface of Nd-Fe-B magnetic material. The composite coating can not only have high corrosion resistance and heat resistance, but also can be prepared by supersonic plasma spraying technology. The coating is compact, uniform, good bonding strength between coating and workpiece, and has enough hardness, which can meet the requirements of wear resistance in the environment of new energy vehicles.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet material preparation, and in particular relates to a wear-resistant NdFeB permanent magnet material for new energy vehicles and a preparation method. Background technique [0002] NdFeB permanent magnet materials are key materials in the fields of aerospace equipment, marine engineering equipment, energy-saving and new energy vehicles, advanced rail transit equipment, and electric power equipment. It is predicted that it will be difficult to be replaced by other permanent magnet materials in the next 10-15 years. Improving and regulating the structure of NdFeB permanent magnet materials and improving their magnetic properties are still the direction of people's continuous efforts. The fastest growing application field of NdFeB permanent magnet materials is used in motor preparation. As the core component of new energy vehicles, the drive motor has broad application prospects for high-coe...

Claims

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Application Information

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IPC IPC(8): H01F1/057H01F41/02
CPCH01F1/0572H01F41/026
Inventor 陈庆司文彬
Owner CHENDU NEW KELI CHEM SCI CO LTD
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