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Preparation method of high-performance magnetic ring

A high-performance, magnetic ring technology, applied in the direction of inductance/transformer/magnet manufacturing, magnetic objects, magnetic materials, etc., to improve magnetic performance and avoid cracking due to excessive internal stress

Active Publication Date: 2021-03-02
宁波金鸡强磁股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the present invention provides a novel method for preparing a high-performance magnetic ring. The obtained magnetic ring has excellent magnetic properties and is not easy to crack, which can meet the needs of high-end application fields

Method used

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  • Preparation method of high-performance magnetic ring

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preparation example Construction

[0023] The preparation method of the high-performance magnetic ring of the present invention will be described in detail below. If there is no other definition for the technical or scientific terms used at this time, they are the meanings commonly understood by those skilled in the technical field of the present invention.

[0024] In this paper, the quick-setting sheet is the quick-setting sheet conventionally defined in the field, that is, the quick-setting sheet is obtained by melting the alloy raw material and casting it on a copper roller with a certain rotating speed.

[0025] In this paper, the average thickness of the quick-setting sheet is defined as the average value of the measurement data of any 100 quick-setting sheets, and the measurement tool can be a vernier caliper or a screw micrometer.

[0026] In this paper, the average thickness of the flaky crystals of the quick-setting sheet is defined as the arithmetic mean of the number of flaky crystals passing through...

Embodiment 1

[0045] The magnetic ring of this embodiment is prepared by the following steps:

[0046] 1) Using industrial raw materials PrNd (75wt% Nd) alloy, pure Dy, Fe, Co, Ga, Cu, Al, Zr metal by composition (PrNd) 30 Dy 1.8 Cu 0.15 Al 0.25 Ga 0.20 co 1.5 Zr 0.01 B 0.96 Fe 余 (wt%) batching, smelting the configured raw materials, casting and throwing the quick-setting sheet with an average thickness of 0.3mm, the melting temperature is 1480°C, the casting temperature is 1440°C, and the copper roll speed is 1.5m / s;

[0047] 2) Put the quick-setting sheet into a stainless steel barrel with a lid, and put it into a vacuum heat treatment furnace for heat treatment. The vacuum degree of heat treatment should be kept ≤4*10 -2 Pa, the heat treatment temperature is 900°C, and the time is 25h. The average thickness of the flaky crystals of the quick-setting sheet grows to 5.8 μm (the average thickness of the columnar crystals of the quick-setting sheet is about 3 μm without heat treatmen...

Embodiment 2

[0052] The difference between the manufacturing method of the magnetic ring in Example 2 and Example 1 is that the magnetic field strength used in the orientation molding in Example 2 is 1.2T, and the others are the same as in Example 1, and will not be repeated here.

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Abstract

A preparation method of a high-performance magnetic ring provided by the invention comprises the following steps of: (1) preparing raw materials according to alloy components of the magnetic ring, smelting the prepared raw materials, carrying out casting and melt-spinning on the raw materials to obtain a quick-setting sheet with the average thickness of 0.2-0.4 mm; (2) carrying out high-temperature heat treatment on the quick-setting sheet; (3) carrying out hydrogen decrepitation on the quick-setting sheet subjected to high-temperature heat treatment to obtain coarse crushing powder, carryingout dehydrogenation heat treatment to enable the hydrogen content of the coarse crushing powder to be less than or equal to 600 ppm, and then feeding the coarse crushing powder into a jet mill for milling to obtain jet mill magnetic powder; (4) adding a lubricating agent into the jet mill magnetic powder, stirring the mixture for 2-6 hours, feeding the mixture into a magnetic ring magnetic field pressing machine for orientation forming after stirring, and then carrying out isostatic pressing treatment; and (5) conducting high-temperature sintering, cooling and tempering heat treatment on the product. The prepared magnetic ring has excellent magnetic performance, is not easy to crack, and can meet the requirements of the high-end application field.

Description

technical field [0001] The invention belongs to the field of preparation of rare earth permanent magnet materials, and relates to a high-performance magnetic ring and a preparation method thereof. Background technique [0002] The permanent magnet parts of traditional permanent magnet motors use magnetic tile splicing rings, which are prepared by assembling, the process is relatively complicated, and there are disadvantages such as the geometric center and the magnetic field center do not coincide, and the surface magnetic distribution is jagged. The magnetic ring has the advantages of compact structure, simple assembly, stable output waveform, etc., which can significantly reduce the weight and energy consumption of the motor, and improve the operation stability. For this reason, the permanent magnet components in high-performance permanent magnet motors are gradually changing from traditional magnetic tile splicing rings to integral magnetic rings. Magnetic rings are most...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/057H01F1/055B22F9/02B22F9/04
CPCH01F41/0253H01F41/0266H01F1/057H01F1/0557B22F9/023B22F9/04B22F2009/044
Inventor 徐峰孟龙沈是茂胡元虎
Owner 宁波金鸡强磁股份有限公司
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