Method for preparing radiation oriental magnetic ring and radiation multipolar magnetic ring

A radiation orientation and multi-pole magnetic ring technology, which is applied in the manufacture of inductors/transformers/magnets, magnetic objects, and the magnetism of inorganic materials, can solve problems such as sintering cracking and uneven shrinkage of magnetic rings, so as to improve the yield and avoid shrinkage Non-uniformity, effect of improving orientation degree

Active Publication Date: 2010-07-07
BEIJING ZHONG KE SAN HUAN HI TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of a radiation orientation magnetic ring and a radiation multipole magnetic ring, which can further improve the orientation degree of the magnetic ring under the existing radiation orientation magnetic field strength, thereby achieving the purpose of improving the magnetic performance of the magnetic ring. At the same time, it can effectively solve the problem of sintering cracking caused by uneven shrinkage of the magnetic ring due to internal stress during the sintering process, and significantly improve the sintering yield of the magnetic ring

Method used

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  • Method for preparing radiation oriental magnetic ring and radiation multipolar magnetic ring

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Embodiment 1

[0039] The raw material alloy is prepared by strip stripping method, and its composition is 5.0Pr-22.0Nd-4.8Dy-0.2Al-0.1Cu-0.5Co-0.2Ga-0.1Zr-1.0B-balance Fe. Then carry out hydrogen crushing treatment, make the raw material alloy hydrogen absorption at room temperature, in Ar 2 Dehydrogenation was performed at 500° C. for 1 hour in an atmosphere. Add 0.1wt.% aluminum stearate and paraffin wax and mix for 1 hour. After jet milling, powder particles with an average particle size of 4 μm are obtained, and then passed through 60 and 300 mesh sieves to obtain powder 1 with uniform particle size distribution.

[0040] Put powder 1 in Ar 2 After annealing at 500° C. for 2 hours in atmosphere, 0.5 wt. % carbonyl iron powder and cyclohexane were added thereto and mixed for 3 hours to obtain powder 2 . Put the powder 2 into a closed rubber container, put it in the magnetic field of the magnetizer to pre-orientate it in one direction, the pre-orientation magnetic field is 0.8T; then sh...

Embodiment 2

[0042] The raw material alloy is prepared by strip stripping method, and its composition is 5.0Pr-22.0Nd-4.8Dy-0.2Al-0.1Cu-0.5Co-0.2Ga-0.1Zr-1.0B-balance Fe. Then carry out hydrogen crushing treatment, make the raw material alloy hydrogen absorption at room temperature, in Ar 2 Dehydrogenation was performed at 500° C. for 1 hour in an atmosphere. Add 0.1wt.% zinc stearate and triglycerides and mix for 1 hour, jet mill to obtain powder particles with an average particle size of 4 μm, and then pass through 60 and 300 mesh sieves to obtain powder 1 with uniform particle size distribution.

[0043] The powder 1 was annealed at 600° C. for 3 hours in a vacuum atmosphere, 1.0 wt. % carbonyl iron powder and cyclohexane were added thereto and mixed for 3 hours to obtain the powder 2 . Put the powder 2 into a closed plastic container, put it in the magnetic field of the press to pre-orientate it in one direction, the pre-orientation magnetic field is 1.5T; then shape the powder 2 on t...

Embodiment 3

[0045] The raw material alloy is prepared by strip stripping method, and its composition is 5.0Pr-22.0Nd-4.8Dy-0.2Al-0.1Cu-0.5Co-0.2Ga-0.1Zr-1.0B-balance Fe. Then carry out hydrogen crushing treatment, make the raw material alloy hydrogen absorption at room temperature, in Ar 2 Dehydrogenation was performed at 500° C. for 1 hour in an atmosphere. Add 0.01wt.% aluminum stearate and paraffin wax and mix for 1 hour, and the average particle diameter obtained after jet milling is 1 μm (the specific surface area is 1.5m 2 / g) powder particles, and then through 60 and 300 mesh sieves to obtain powder 1 with uniform particle size distribution.

[0046] Put powder 1 in Ar 2 After annealing at 500° C. for 2 hours under atmosphere, 0.05 wt. % carbonyl iron powder and cyclohexane were added thereto and mixed for 3 hours to obtain powder 2 . Put the powder 2 into an airtight container made of non-magnetic stainless steel, and put it in the magnetic field of the magnetizer to pre-orient...

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Abstract

The invention provides a method for preparing a radiation oriental magnetic ring and a radiation multipolar magnetic ring. The method comprises the following steps of: melting and casting raw material of alloy in a vacuum furnace; carrying out coarse / hydrogen decrepitation on the ingots in the inert atmosphere; adding matters into the powder subject to coarse / hydrogen decrepitation to mix; carrying out micro crushing on the alloy coarse powder by an airflow mill in the nitrogen atmosphere; annealing the alloy powder in the inert gas, vacuum or reduction atmospheres; adding carbonyl iron powder and at least one type of alicyclic hydrocarbon into the annealed alloy powder to mix; carrying out preorientation operation on the mixing powder; enabling the mixing powder to form a circular former in the magnetic field; carrying out integral grinding treatment on the inner wall of the circular former; and sintering the circular former in the vacuum or inert gas atmosphere. The invention has the advantages of effectively decreasing the oriental field required in forming, enhancing the oriental degree of the magnetic rings and improving the property of the magnetic rings.

Description

technical field [0001] The present invention relates to a preparation method of a radiation magnetic ring, especially a preparation method of a radiation orientation magnetic ring and a radiation multipole magnetic ring, especially a radiation orientation rare earth permanent magnet ring and a radiation multipole rare earth permanent magnet ring method of preparation. Background technique [0002] At present, the requirements for the high performance of magnets are increasing day by day, so the requirements for the preparation of rare earth alloy powders for radiation-oriented rare earth permanent magnet rings and radiation multi-pole rare earth permanent magnet rings are also getting higher and higher, such as high fluidity, excellent compression molding properties, etc. The solution is to add organic solvents such as n-butene and ethylene glycol to the rare earth alloy powder and mix it into a slurry for granulation. The granulation powder effectively improves the fluidit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/08H01F13/00B22F3/12
Inventor 王浩颉陈国安王湛钮萼李正饶晓雷胡伯平
Owner BEIJING ZHONG KE SAN HUAN HI TECH
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