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Preparation method for high-strength neodymium-iron-boron alloy superfine permanent magnetic powder

A technology of NdFeB and permanent magnetic powder, which is applied in the field of preparation of high-strength NdFeB alloy ultrafine permanent magnetic powder, which can solve problems such as easy to fall off and strength that cannot meet the requirements, so as to increase the added value of products and expand the application field of products , the effect of improving the degree of convenience

Inactive Publication Date: 2018-05-25
诺克斯机电科技海安有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] And the existing products are easy to fall off during friction, the main reason is that the strength cannot meet the requirements, so it is necessary to provide a new device with higher strength and with the ability to avoid the magnetic layer falling off

Method used

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  • Preparation method for high-strength neodymium-iron-boron alloy superfine permanent magnetic powder
  • Preparation method for high-strength neodymium-iron-boron alloy superfine permanent magnetic powder
  • Preparation method for high-strength neodymium-iron-boron alloy superfine permanent magnetic powder

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Embodiment 1

[0021] Embodiment 1, the preparation method of high-strength NdFeB alloy ultrafine permanent magnet powder, is characterized in that, the preparation method of described NdFeB alloy ultrafine permanent magnet powder successively comprises raw material selection, formula, vacuum smelting process, vacuum quick quenching process , Vacuum crystallization heat treatment process, aging process, magnetic property testing process, jet mill processing process, ultrasonic sieving particle size distribution testing process, secondary testing process of magnetic properties of finished product mixture.

[0022] The raw materials preferably selected include praseodymium-neodymium alloy, electrolytic lanthanum-cerium alloy with a purity of 45%, iron with a purity of 99.98%, iron-boron alloy with a purity of 18%, zirconium alloy with a purity of 86%, and cobalt alloy with a purity of 91%. , the weight ratio of praseodymium to neodymium of the praseodymium neodymium alloy is 20:81 or 25:76.

...

Embodiment 2

[0035] Embodiment 2 The preparation method of high-strength NdFeB alloy ultrafine permanent magnet powder, characterized in that, the preparation method of said NdFeB alloy ultrafine permanent magnet powder successively includes raw material selection, formula, vacuum smelting process, vacuum rapid quenching process, Vacuum crystallization heat treatment process, aging process, magnetic property testing process, jet mill processing process, ultrasonic sieving particle size distribution testing process, and secondary testing process of magnetic properties of finished product mixture;

[0036] The raw materials preferably selected include praseodymium-neodymium alloy, electrolytic lanthanum-cerium alloy with a purity of 80%, iron with a purity of 99.98%, iron-boron alloy with a purity of 21%, zirconium alloy with a purity of 86%, and cobalt alloy with a purity of 91%. , the weight ratio of praseodymium and neodymium of the praseodymium neodymium alloy is 20:81 or 25:76;

[0037]...

Embodiment 3

[0047] Embodiment 3, the preparation method of high-strength NdFeB alloy ultrafine permanent magnetic powder, is characterized in that, the preparation method of described NdFeB alloy ultrafine permanent magnetic powder comprises raw material selection, formula, vacuum smelting process, vacuum quick quenching process in sequence , Vacuum crystallization heat treatment process, aging process, magnetic property testing process, jet mill processing process, ultrasonic sieving particle size distribution testing process, finished product mixture magnetic property secondary testing process;

[0048] The raw materials preferably selected include praseodymium-neodymium alloy, electrolytic lanthanum-cerium alloy with a purity of 60%, iron with a purity of 99.98%, iron-boron alloy with a purity of 20%, zirconium alloy with a purity of 86%, and cobalt alloy with a purity of 91%. , the weight ratio of praseodymium and neodymium of the praseodymium neodymium alloy is 20:81 or 25:76;

[0049]...

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Abstract

The invention provides a preparation method for high-strength neodymium-iron-boron alloy superfine permanent magnetic powder. The preparation method for the high-strength neodymium-iron-boron alloy superfine permanent magnetic powder comprises optimal selection of raw materials, formula making, a vacuum melting procedure, a vacuum quick quenching procedure, a vacuum crystallization heat treatmentprocedure, an aging procedure, a magnetic performance detection procedure, an air flow grinding procedure, an ultrasonic wave screening particle size distribution detection procedure and a finished product mixed material magnetic performance secondary detection procedure in sequence. The preparation method for the high-strength neodymium-iron-boron alloy superfine permanent magnetic powder has thebeneficial effects that the magnetic powder prepared by the preparation method for the high-strength neodymium-iron-boron alloy superfine permanent magnetic powder is applied to the field of anti-counterfeiting and can greatly improve the anti-counterfeiting function of electronic anti-counterfeiting products and printed anti-counterfeiting products, and the added value of products is improved; and the magnetic powder adopted by a device has high-strength high wear resistance, and the device can resist long-term wear without dropping the magnetic powder.

Description

technical field [0001] The invention relates to the technical field of magnetic composite materials, in particular to a preparation method of high-strength neodymium-iron-boron alloy superfine permanent magnet powder. Background technique [0002] With the rapid development of high-tech industries, NdFeB permanent magnet powder is widely used in aviation, aerospace, navigation, automobiles and various precision instruments, small and medium-sized, micro high-efficiency motors, computers and IT technology equipment, office automation equipment and many household appliances. and other fields, and continue to expand. However, the electronic information industry for highly anti-counterfeit products and commodities, and the identification barcode printing industry have put forward new requirements for the use of NdFeB permanent magnet powder. [0003] Moreover, existing products tend to fall off during friction, mainly because the strength cannot meet the requirements. Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08H01F1/057
CPCB22F9/082H01F1/0571
Inventor 吴宗昆王雨婷张润张莹吴海峰吴同吴斌罗兰
Owner 诺克斯机电科技海安有限公司
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