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Method for preparing cerium-added neodymium-iron-boron magnet by 3D printing technology

A 3D printing, NdFeB technology, applied in the direction of magnetic objects, magnetic materials, additive processing, etc., to achieve the effect of reducing costs, reducing costs, and shortening production cycles

Inactive Publication Date: 2016-03-16
LONGYAN ZIJIN INNOVATION RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing technology to prepare bonded magnets requires corresponding molds, and it takes a certain amount of time to make the molds. After the product is demoulded, subsequent processing is required, and there is a certain processing cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In step (1), metal neodymium, cerium, ferroboron, iron, zinc, and nickel are smelted into alloys, and the mass fractions of each raw material are 21.2%, 10%, 4.7%, 62.8%, 0.8%, and 0.5%, respectively.

[0018] Irregular-shaped magnetic powders are made after stripping and jet milling. The strip speed is 15m / s. A counter-jet jet mill is adopted, the air pressure of the nozzle is 1MPa, and the rotating speed of the classifying wheel is 3000rpm.

[0019] In step (2), the irregular-shaped magnetic powder is passed through plasma gas atomization powder making equipment to obtain spherical magnetic powder. The average particle size of the obtained spherical magnetic powder is 20 μm. The spherical magnetic powder has good fluidity and can be used in 3D printing.

[0020] In step (3), the spherical magnetic powder is uniformly mixed with a binder and a processing aid, the binder is epoxy resin, and the processing aid includes a lubricant and a plasticizer. Among them, the sp...

Embodiment 2

[0024] In step (1), metal neodymium, cerium, ferroboron, iron, zinc, and nickel are smelted into alloys, and the mass fractions of each raw material are 24.7%, 5%, 4.7%, 64.3%, 0.8%, and 0.5%, respectively.

[0025] Irregular-shaped magnetic powders are made after stripping and jet milling. The strip speed is 15m / s. A counter-jet jet mill is adopted, the air pressure of the nozzle is 0.7MPa, and the speed of the classifying wheel is 3000rpm.

[0026] In step (2), the irregular-shaped magnetic powder is passed through plasma gas atomization powder making equipment to obtain spherical magnetic powder. The average particle size of the obtained spherical magnetic powder is 35 μm. The spherical magnetic powder has good fluidity and can be used in 3D printing.

[0027] In step (3), the spherical magnetic powder is uniformly mixed with a binder and a processing aid, the binder is epoxy resin, and the processing aid includes a lubricant and a plasticizer. Among them, the spherical ...

Embodiment 3

[0031] In step (1), metal neodymium, cerium, ferroboron, iron, zinc, and nickel are smelted into alloys, and the mass fractions of each raw material are 24.7%, 5%, 4.7%, 64.3%, 0.8%, and 0.5%, respectively.

[0032] Irregular-shaped magnetic powders are made after stripping and jet milling. The belt throwing speed is 15m / s. A counter-jet jet mill is adopted, the air pressure of the nozzle is 0.3MPa, and the speed of the classifying wheel is 3000rpm.

[0033] In step (2), the irregular-shaped magnetic powder is passed through the plasma gas atomization powder making equipment to obtain spherical magnetic powder. The average particle size of the obtained spherical magnetic powder is 60 μm. The spherical magnetic powder has good fluidity and can be used in 3D printing.

[0034] In step (3), the spherical magnetic powder is uniformly mixed with a binder and a processing aid, the binder is phenolic resin, and the processing aid includes a lubricant and a plasticizer. Among them,...

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Abstract

The invention discloses a method for preparing a cerium-added neodymium-iron-boron magnet by a 3D printing technology. The method comprises the steps of smelting metal neodymium, cerium, ferroboron, iron, zinc, and nickel into an alloy; preparing into irregular magnetic powder after performing melt-spinning and air flow milling; performing plasmas gas atomization on the irregular magnetic powder to prepare spherical magnetic powder body; uniformly mixing the spherical magnetic powder body with a binder and a processing aid; feeding the mixed powder into 3D printing equipment, performing three-dimensional modeling according to sizes and shapes of a product based on computer software, and performing a hierarchical slicing treatment on the product models; leading the three-dimensional models into the 3D printing equipment, spraying the mixed powder to a heating model workbench, enabling the binder and the processing aid in the mixed powder to be dissolved, and enabling the cerium neodymium-iron-boron powder to be glued together, and performing magnetizing in the printing process until the product is printed completely. The product is good in cost performance and high in processing property, and the production period and cost of the bonded magnets are reduced.

Description

technical field [0001] The invention relates to a rare earth permanent magnet alloy, in particular to a bonded magnet for 3D printing, in particular to a method for preparing a cerium-added NdFeB magnet using 3D printing technology. Background technique [0002] One of the key technologies of 3D printing lies in the morphology and properties of the materials used. The printing material is generally a spherical powder (bonded magnet), and the spheroidization rate of the powder is generally required to be greater than 98%. Only a high spheroidization rate can ensure that the printing powder is evenly and smoothly transported to the printing bath, so as to obtain a printed product with a dense structure and a low defect rate. At present, it is difficult to prepare high-end fine-grained spherical metal powder in China, and this powder depends on imports. [0003] Spherical powders can be prepared by the plasma spheroidization technique. Using this technology, the irregularly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/057H01F1/08B22F1/00B22F9/08C22C38/08B33Y10/00B33Y70/00
CPCH01F1/0571H01F41/0253C22C38/002C22C38/005C22C38/08B22F9/08B22F1/10
Inventor 解伟肖震韩珩钟炳文
Owner LONGYAN ZIJIN INNOVATION RES INST
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