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Microwave curing process of bonded NdFeB magnet

A microwave curing and neodymium-iron-boron technology, which is applied to the maintenance of magnetic objects, magnetic materials, and heating chambers, can solve the problems of shortening curing time, curing deformation rate, high energy consumption, and low efficiency of electric heating and curing processes. The effect of curing efficiency and output, reducing energy consumption, and uniform mechanical strength of the product

Inactive Publication Date: 2013-03-20
湖南航天有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the low efficiency and high energy consumption of the existing electric heating curing process, the present invention aims to provide a microwave curing process for bonded NdFeB magnets, which can shorten the curing time, reduce energy consumption, reduce Curing deformation rate, greatly improving the curing strength and yield of bonded NdFeB

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A microwave curing process for bonded NdFeB magnets. First, the binder NdFeB magnet green body is placed on the ceramic substrate, placed in a single layer, and then placed in the microwave kiln body as a whole, and the furnace door is closed. . Set the heating rate to 20°C / min, set the curing temperature to 140°C, and set the curing holding time to 15min. After the setup is complete, turn on the exhaust system, microwave source system and water cooling system. After the heat preservation is over, turn off the microwave source and the water cooling system to cool the sample with the furnace, keep the exhaust system working for 5 minutes and then turn it off, and you can get a bonded NdFeB product with excellent curing effect. The structure of the microwave kiln includes microwave sources arranged on both sides of the furnace body, a cooling interlayer wrapped around the furnace body, the upper end of the furnace body is provided with an exhaust system connected with th...

Embodiment 2

[0023] A microwave curing process for bonded NdFeB magnets. First, the binder NdFeB magnet green body is placed on the ceramic substrate, placed in multiple layers (average 3 layers), and then placed in a microwave kiln body as a whole , close the oven door. Set the heating rate to 15°C / min, set the curing temperature to 145°C, and set the curing holding time to 15min. After the setup is complete, turn on the exhaust system, microwave source system and water cooling system. After the heat preservation is over, turn off the microwave source and the water cooling system to cool the sample with the furnace, keep the exhaust system working for 10 minutes and then turn it off, and you can get a bonded NdFeB product with excellent curing effect.

[0024] The concrete structure of microwave kiln is the same as embodiment 1.

Embodiment 3

[0026] A microwave curing process for bonded NdFeB magnets. First, the binder NdFeB magnet green body is placed on the ceramic substrate, placed in a single layer, and then placed in the microwave kiln body as a whole, and the furnace door is closed. . Set the heating rate to 15°C / min, set the curing temperature to 135°C, and set the curing holding time to 10min. Microwave kiln and all the other operating steps are the same as in Example 1.

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Abstract

The invention discloses a microwave curing process of a bonded NdFeB magnet, aiming at solving the problems of low efficiency and high energy consumption of the traditional electrothermal curing process. The microwave curing process comprises the following steps of: (1) putting a green body of the bonded NdFeB magnet on a ceramic substrate, and putting the ceramic substrate into a microwave kiln; (2) starting an exhaust system of the microwave kiln, heating to 135-145 DEG C at a heating speed of 15 DEG C / min-20 DEG C / min, and maintaining the temperature for 10-15min; and (3) powering off the exhaust system after the temperature preservation is ended, and taking the bonded NdFeB magnet out. The microwave curing process disclosed by the invention is short in curing time, low in energy consumption, small in curing deformation rate, uniform in product quality and greatly improved in curing strength and yield of the bonded NdFeB magnets.

Description

technical field [0001] The invention relates to the field of curing of bonded NdFeB magnets, in particular to a microwave curing process of bonded NdFeB magnets. Background technique [0002] Heating curing is an important production link of bonded NdFeB magnets. The existing technology is mainly to heat and cure the magnets in an electric blast drying oven or a far-infrared drying oven through a specific heating and heat preservation process to obtain the required mechanical properties. Strength, the highest curing temperature is usually above 180 ℃, and the electric furnace heat curing cycle is about 2 hours. The shortcomings of the existing curing process are small output and long cycle time, the mechanical strength of the NdFeB magnet after curing is not high, and the problem of curing deformation is serious, which can no longer meet the needs of large-scale production. Contents of the invention [0003] In order to overcome the low efficiency and high energy consumpt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/04H01F1/057F27B17/00F27D11/00F27D7/06F27D19/00
Inventor 曹二斌周飞彭锦波张刚刘坤孙友元赵彦
Owner 湖南航天有限责任公司
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