A kind of processing method of neodymium magnet adding yttrium element

A processing method and technology of neodymium magnets, applied in the direction of inductance/transformer/magnet manufacturing, magnetic objects, magnetic materials, etc., can solve the problems of magnet remanence and magnetic energy product decline, etc., achieve reduction of preparation costs, reasonable selection, and simplification of preparation steps Effect

Active Publication Date: 2022-03-11
惠州市德创磁业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems that the addition of metal yttrium to a single alloy will lead to a substantial decrease in the remanence and energy product of the magnet, the invention provides a compound addition of low-cost metals, which has low requirements for production and processing technology, and reduces the cost of permanent magnet material preparation as a whole. And the scheme that does not affect the overall performance of the permanent magnet material is as follows:

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The processing of the neodymium magnet of embodiment 1 adding yttrium element:

[0040] (1) Get the alloy raw material according to the alloy formula, and vacuum smelt;

[0041] (2) Gained alloy carries out quick-setting cast sheet;

[0042] (3) Gained cast sheet obtains alloy powder through mixed hydrogen crushing and jet milling;

[0043] (4) The alloy powder after milling is prepared into a green compact in a magnetic field press;

[0044] (5) The obtained green body is sintered and heat-treated to obtain a neodymium magnet added with yttrium element;

[0045] The alloy formulation in step (1) includes the following elements: Pr, Nd, Y, B, Fe.

[0046] The alloy raw materials include rare earth metals PrNd, Y, B, Fe.

[0047] The ratio of the alloy material to be taken is, in parts by mass, 23 parts of rare earth metal PrNd, 5 parts of Y, 0.9 parts of B, and 63 parts of Fe.

[0048] Step (1) described vacuum smelting, vacuum tightness is 1.5 * 10 -1 Pa.

[0049]...

Embodiment 2

[0073] The processing of the neodymium magnet of embodiment 2 adding yttrium element:

[0074] (1) Get the alloy raw material according to the alloy formula, and vacuum smelt;

[0075] (2) Gained alloy carries out quick-setting cast sheet;

[0076] (3) Gained cast sheet obtains alloy powder through mixed hydrogen crushing and jet milling;

[0077] (4) The alloy powder after milling is prepared into a green compact in a magnetic field press;

[0078] (5) The obtained green body is sintered and heat-treated to obtain a neodymium magnet added with yttrium element;

[0079] The alloy formulation in step (1) includes the following elements: Pr, Nd, Y, B, Fe.

[0080] The alloy raw materials include rare earth metals PrNd, Y, B, Fe.

[0081] The ratio of the alloy material to be taken is, in terms of parts by mass, 26 parts of rare earth metal PrNd, 10 parts of Y, 0.95 parts of B, and 68 parts of Fe.

[0082] Step (1) described vacuum smelting, vacuum tightness is 8.5 * 10 -1 ...

Embodiment 3

[0090] The processing of the neodymium magnet of embodiment 3 adding yttrium element:

[0091] (1) Get the alloy raw material according to the alloy formula, and vacuum smelt;

[0092] (2) Gained alloy carries out quick-setting cast sheet;

[0093] (3) Gained cast sheet obtains alloy powder through mixed hydrogen crushing and jet milling;

[0094] (4) The alloy powder after milling is prepared into a green compact in a magnetic field press;

[0095] (5) The obtained green body is sintered and heat-treated to obtain a neodymium magnet added with yttrium element;

[0096] The alloy formulation in step (1) includes the following elements: Pr, Nd, Y, B, Fe, Ga, Zr, Cu, Co, Al.

[0097] The alloy raw materials include rare earth metals PrNd, Y, B, Fe, Nd, Ga, Zr, Cu, Co, Al.

[0098] The ratio of the alloy material to be taken is, in parts by mass, 28 parts of rare earth metal PrNd, 5 parts of Y, 0.9 part of B, 63 parts of Fe, 0.1 part of Nb, 0.1 part of Ga, 0.1 part of Zr, and...

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Abstract

The invention discloses a method for processing neodymium magnets added with yttrium element, and relates to the field of multi-alloy permanent magnet preparation methods. The method comprises the following steps: taking alloy raw materials according to the alloy formula, and vacuum smelting; performing quick solidification casting of the obtained alloy; and casting the obtained casting The alloy powder is obtained by mixing hydrogen crushing and jet milling; the alloy powder is prepared into a green body in a magnetic field press; the green body is sintered and heat-treated to obtain a neodymium magnet added with yttrium; the alloy formula includes the following elements: Pr, Nd, Y, B, Fe. According to the processing method of neodymium magnets added with yttrium element provided by the present invention, the magnetic properties of the obtained products can reach the original medium and high performance indicators, and the magnets have lower oxygen content and better corrosion resistance, and can save about 5-10% of praseodymium, neodymium, dysprosium and terbium and other metals, reducing costs by 5‑10%. And make better comprehensive utilization of rare earth resources.

Description

technical field [0001] The invention relates to the field of preparation methods of multi-alloy permanent magnets, in particular to a method for processing neodymium magnets added with yttrium element. Background technique [0002] A permanent magnet is a magnet that can retain a high remanence for a long time in an open circuit state. NdFeB permanent magnet material is based on the intermetallic compound Nd 2 Fe 14 B-based permanent magnet material. Compared with cast Al-Ni-Co permanent magnet materials and ferrite permanent magnet materials, NdFeB has extremely high magnetic energy product and coercive force, and can absorb heavy objects equivalent to 640 times its own weight. The advantages of high energy density make NdFeB permanent magnet materials widely used in modern industry and electronic technology. With the rapid growth of new rare earth materials such as neodymium iron permanent magnet materials, the rapid development of the rare earth industry has been stim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/057
CPCH01F41/0266H01F1/0577
Inventor 赖德全雷激
Owner 惠州市德创磁业科技有限公司
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