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High stability and high magnetism quenched R-Fe-B base permanent magnetic alloy powder

A permanent magnetic alloy powder, high stability technology, applied in the chemical industry, can solve the problem of narrow parameter window, difficult to grasp, etc., to achieve the effect of improving performance and quality, improving microscopic grain structure, and enhancing temperature stability

Inactive Publication Date: 2007-06-27
DONGFANG MICRON & NANOMETER SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the parameter window for this optimal cooling rate is very narrow and difficult to grasp

Method used

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  • High stability and high magnetism quenched R-Fe-B base permanent magnetic alloy powder
  • High stability and high magnetism quenched R-Fe-B base permanent magnetic alloy powder
  • High stability and high magnetism quenched R-Fe-B base permanent magnetic alloy powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] According to the following ingredient formula, the purity is 99.9% Nd metal, and the atomic percentage is 8.1%; Fe-B alloy (wherein the content of B is 19%), and the atomic percentage of B is 5.9%; Fe-Nb alloy (Nb's The content is 67%), the atomic percentage of Nb is 4.0%; the atomic percentage of iron is 82.0%. According to the alloy process (1) described herein, 40 kilograms of alloy ingots are made, and the composition of the retested alloy is correct. With the quick quenching powder making process (2) described in this article, make quick quenching magnetic powder, keep the temperature of the quartz nozzle cavity at 1375 ° C, the spray speed is 0.5-0.7 kg / min, and the wheel speed is 27 m / s about. The crystallization temperature was kept at 650° C., and the crystallization time was 10 minutes. The prepared magnetic powder is measured with a vibrating sample magnetic phase meter (VSM), and the magnetic properties of the magnetic powder are as follows: Br=0.892T, Hcj...

Embodiment 2

[0071] According to the following ingredient formula, the purity is 99.9% Nd metal, and the atomic percentage is 9.5%; Fe-B alloy (wherein the content of B is 19%), and the atomic percentage of B is 5.9%; Fe-Nb alloy (Nb's The content is 67%), the atomic percentage of Nb is 2.6%; the atomic percentage of iron is 82.0%. According to the alloy process (1) described herein, 40 kilograms of alloy ingots are made, and the composition of the retested alloy is correct. With the quick quenching powder making process (2) described in this article, make quick quenching magnetic powder, keep the temperature of the quartz nozzle cavity at 1375 ° C, the spray speed is 0.5-0.7 kg / min, and the wheel speed is 27 m / s about. The crystallization temperature was kept at 680° C., and the crystallization time was 10 minutes. The prepared magnetic powder is measured with a vibrating sample magnetic phase meter (VSM), and the magnetic properties of the magnetic powder are as follows: Br=0.895T, Hcj...

Embodiment 3

[0073] According to the following ingredient formula, (A) the Nd metal with a purity of 99.9%, the atomic percentage is 12.1%; the Fe-B alloy (wherein the content of B is 19%), the atomic percentage of B is 5.5%; the metal Co, The atomic percentage is 5.5%; the atomic percentage of iron is 76.9%. (B) Nd metal with a purity of 99.9%, 11.1% atomic number; Fe-B alloy (wherein B content is 19%), B 5.5 atomic%; metal Co, 5.5 atomic% ; Fe-Nb alloy (Nb content is 67%), the atomic percentage of Nb is 1.0%; the atomic percentage of iron is 76.9%. According to the alloy process (1) described herein, 40 kilograms of alloy ingots are made, and the composition of the retested alloy is correct. With the quick quenching powder making process (2) described in this article, make quick quenching magnetic powder, keep the temperature of the quartz nozzle cavity at 1375 ° C, the spray speed is 0.5-0.7 kg / min, and the wheel speed is 27 m / s about. The crystallization temperature is controlled at...

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Abstract

The high stability and high magnetism quenched R-Fe-B base permanent magnetic alloy powder has the basic expression of RxFe100-x-y-z-vMzCovBy, where R is light RE element(s) Nd, Pr and La, and M is element(s) of Nb, Zr, Ti, etc; and consists of main R2Fe14B phase and small amount of superfine auxiliary Fe-alpha-M-beta phase. Adding Nb and other transition elements to form small amount of superfine auxiliary Fe-alpha-M-beta phase during fast solidification can inhibit over nucleation and growth of Nd2Fe14B crystal grain, improve the performance of the quenched material, fine the Nd2Fe14B crystal grain and raise the temperature stability and antioxidant process of the material. In addition, the permanent magnetic alloy powder has obviously raised intrinsic coercive force, high saturated magnetization, high residual magnetism and other advantages.

Description

technical field [0001] The invention relates to the composition and phase composition of a high-stability and high-magnetism quick-quenching R-Fe-B-based permanent magnet alloy powder and a bonded permanent magnet. It belongs to the technical field of chemical engineering. Background technique [0002] NdFeB quenching permanent magnet alloy powder and bonded NdFeB permanent magnet are important inventions in the 1980s. Since bonded NdFeB permanent magnets have good magnetic properties and excellent processing accuracy, they are widely used in the fields of computers, consumer electronics and household appliances. [0003] At present, there are two main processes for producing NdFeB quick quenching permanent magnet alloy powder, one is called atomization method, and the other is called roll quenching method (Melt Spinning), referred to as quick quenching method. The NdFeB magnetic powder produced by the quick quenching method is called NdFeB quick quenching permanent magnet...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C38/60C22C38/32
Inventor 李晋平夏芧栗
Owner DONGFANG MICRON & NANOMETER SCI TECH
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