Components and manufacturing process of rare earth permanent magnet material

A rare earth permanent magnet, manufacturing process technology, applied in magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve the problems of large investment, rising, low profit of low-end products, etc.

Inactive Publication Date: 2010-09-08
TIANHE ADVANCED TECH MAGNET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] After the invention of NdFeB in 1983, the level of industrial production has developed by leaps and bounds, and the performance of products has also been greatly improved; however, there are still many companies that cannot produce high-performance products. With the continuous increase in raw material prices, low The profits of high-end products are getting lower and lower. Many manufacturers want to improve the performance of their products and enter the high-end market. However, the investment in high-performance NdFeB production lines is very large, and the process requirements are quite strict. How to use low-cost investment to achieve mass production of high-end products , is a problem facing many manufacturers. At present, the price of rare earth raw materials, especially heavy rare earth raw materials, is rising steadily. How to save material costs? We have done a lot of work in this area, and this invention is a part of our achievements

Method used

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  • Components and manufacturing process of rare earth permanent magnet material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0038] According to the following atomic percentage

[0039] (Pr, Nd) 13.35 Dy 0.1 B 5.85 Nb 0.15 al 0.1 Fe 其余

[0040] (Pr, Nd) 13.2 Dy 0.25 B 5.85 al 0.1 Fe 其余

[0041] Preparation of raw materials, in which Pr and Nd are added in the form of alloys, the content of Pr is about 20%, the average particle size of jet mill powder is 3.0um, and it is oriented in a 1.9T magnetic field, and the rough density is 4.2g / cm 3 , and then sintered in a vacuum sintering furnace at a temperature of 1055°C and a holding time of 4hrs, and then carry out secondary aging: the first aging temperature is 900°C and holding time is 2 hours; the secondary temperature is 470°C and holding time is 3 hours. Released for performance testing.

[0042]

[0043] The oxygen content of the two samples is 800-1000PPM. From the comparison, it can be seen that the Hcj is basically the same, but because the Nb-added formula uses less Dy, the formula cost is low; and the Nb-added product ha...

Embodiment example 2

[0045] According to the following atomic percentage

[0046] (Pr, Nd) 10.65 Dy 2.85 B 6 Nb0.3 al 0.5 co 2 Cu 0.2 Fe 其余

[0047] (Pr, Nd) 10.4 Dy 3.1 B 6 al 0.5 co 2 Cu 0.2 Fe 其余

[0048] Preparation of raw materials, in which Pr and Nd are added in the form of alloys, the content of Pr is about 20%, the average particle size of jet mill powder is 3.0um, and it is oriented in a 1.9T magnetic field, and the rough density is 4.2g / cm 3 , and then sintered in a vacuum sintering furnace at a temperature of 1075°C and a holding time of 4hrs, and then carry out secondary aging: the first aging temperature is 910°C, holding for 2 hours, the secondary temperature is 500°C, holding for 3 hours, and cooling after the holding Released for performance testing.

[0049]

[0050] The oxygen content of the two samples is 1000-1500PPM. From the comparison, it can be seen that the Hcj is almost the same. The dosage of Dy in the formula with Nb added is much less and the...

Embodiment example 3

[0052] According to the following atomic percentage

[0053] (Pr, Nd) 12.6 Dy 0.7 Tb 0.1 B 6 Nb 0.2 al 0.3 co 0.5 Fe 其余

[0054] (Pr, Nd) 12.5 Dy 0.6 Tb 0.3 B 6 al 0.3 co 0.5 Fe 其余

[0055] Preparation of raw materials, in which Pr and Nd have been added in the form of alloys, the content of Pr is about 20%, the average particle size of jet mill powder is 3.0um, and it is oriented in a 1.9T magnetic field, and the rough density is 4.2g / cm 3 , and then sintered in a vacuum sintering furnace at a temperature of 1070°C and a holding time of 4hrs, and then carry out secondary aging: the first aging temperature is 900°C, holding for 2 hours, the secondary temperature is 480°C, holding for 3 hours, and cooling after the holding Released for performance testing.

[0056]

molecular formula

Br / kg

the s

Hcj / kOe

Hk / kO

e

(BM)max

1

(Pr, Nd) 12.6 Dy 0.7 Tb 0.1 B 6 Nb 0.2 al 0.3

co 0.5 Fe ...

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Abstract

The invention relates to components and a manufacturing process of a rare earth permanent magnet material. The material comprises the following components by atomic percentage ratio: Re (x) Fe (100-x-z-a-b-c) B (z) Nb (a) Al (b) M (c), wherein x is equal to 12-16, and z is equal to 5.5-6.5; a is equal to 0.05-1, and b is equal to0-0.8; and c is equal to 0-3, and Re represents all rare earth elements comprising one or more of Nd, Pr, Gd, Ho, Dy and Tb. By adding the Nd, Hcj can be improved, the rectangle degree of a J-H demagnetization curve can be improved, the temperature stability of products can be improved, the amount of heavy rare earth Dy, Tb and the like can be reduced, and the material cost can be reduced.

Description

technical field [0001] The invention belongs to a composition and a manufacturing method of a permanent magnet material, in particular to a composition and a manufacturing process of a rare earth permanent magnet material. Background technique [0002] After the invention of NdFeB in 1983, the level of industrial production has developed by leaps and bounds, and the performance of products has also been greatly improved; however, there are still many companies that cannot produce high-performance products. With the continuous increase in raw material prices, low The profits of high-end products are getting lower and lower. Many manufacturers want to improve the performance of their products and enter the high-end market. However, the investment in high-performance NdFeB production lines is very large, and the process requirements are quite strict. How to use low-cost investment to achieve mass production of high-end products , is a difficult problem facing many manufacturers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/053B22D11/06B22F1/00C22C33/02
CPCC22C38/06C22C38/002C22C38/005H01F41/0273C22C38/12C22C2202/02C22C38/10H01F1/0573C22C38/16H01F1/0577
Inventor 袁文杰董义范耀林陈雅
Owner TIANHE ADVANCED TECH MAGNET
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