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A kind of nd-fe-b thin strip magnet and preparation method thereof

A nd-fe-b, thin strip technology, applied in the direction of magnetic objects, inductance/transformer/magnet manufacturing, magnetic materials, etc., can solve the problems of performance degradation, research inconvenience, and far difference in performance theoretical values, etc., to achieve good hard The effect of magnetic properties

Inactive Publication Date: 2019-02-19
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a Nd-Fe-B thin strip magnet and its preparation method, the elemental composition of the Nd-Fe-B thin strip magnet has the general formula Nd a Fe b B c Al d Ni e co f Cu g Ti h Si i Nb j , by adding different amounts of Alnico alloys to the Nd-Fe-B alloy composition, it is equivalent to adding elements of the Alnico alloy to the Nd-Fe-B alloy regularly, and the general formula of the element composition is Nd a Fe b B c Al d Ni e co f Cu g Ti h Si i Nb j The Nd-Fe-B thin strip magnet overcomes the existing technology that after adding a single element, while improving one or a limited number of properties of the magnet material, it often leads to the reduction or change of other properties, so that the performance is relatively low. Theoretical values ​​are far apart, and when adding multiple elements at the same time, there are no rules to follow, which brings inconvenience to subsequent research.

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  • A kind of nd-fe-b thin strip magnet and preparation method thereof
  • A kind of nd-fe-b thin strip magnet and preparation method thereof
  • A kind of nd-fe-b thin strip magnet and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0037] The first step, raw material preparation:

[0038] According to the content of each element after adding Alnico alloy to Nd-Fe-B alloy, calculate the atomic percentage content of each element in the alloy, use Nd 11.36 Fe 81.17 B 5.67 al 0.54 Ni 0.40 co 0.74 Cu 0.09 Ti 0.01 Si 0.01 Nb 0.01 Express, and then calculate Nd according to the atomic percentage 11.36 Fe 81.17 B 5.67 al 0.54 Ni 0.40 co 0.74 Cu 0.09 Ti 0.01 Si 0.01 Nb 0.01 The mass percentage of the constituent elements in the composition is taken by weighing the component raw materials pure Nd, pure Fe, pure Al, pure Ni, pure Co, pure Cu, pure Ti, pure Si, Fe-B alloy and Fe-Nb alloy by mass percentage. This completes the preparation of raw materials. In the raw materials of the above-mentioned composition, B uses Fe-B alloy as raw material, wherein the content of B is 18~21% (mass percentage), and Nb uses Fe-Nb alloy as raw material, wherein the content of Nb is 50~ 80% (mass percentage);

...

Embodiment 2

[0048] The first step, raw material preparation:

[0049] With embodiment 1;

[0050] The second step is to melt the raw materials to prepare master alloy ingots:

[0051] With embodiment 1;

[0052] The third step, the preparation of Nd-Fe-B thin strip magnet products:

[0053] The Nd obtained in the second step 11.36 Fe 81.17 B 5.67 al 0.54 Ni 0.40 co 0.74 Cu 0.09 Ti 0.01 Si 0.01 Nb 0.01 The master alloy ingot is loaded into the melt quenching furnace, and after remelting, the melt is quenched on the cooling molybdenum roller rotating at a peripheral speed of 5m / s, and the element composition is Nd 11.36 Fe 81.1.7 B 5.67 al 0.54 Ni 0.40 co 0.74 Cu 0.09 Ti 0.01 Si 0.01 Nb 0.01 Nd-Fe-B thin strip magnet products; the magnetic properties of the thin strip magnet products are: intrinsic coercivity: 52.1kA / m, remanence: 0.21T, magnetic energy product: 10.2kJ / m 3 , the thickness of the thin strip magnet product is 78 μm, and the average grain size of the main...

Embodiment 3

[0055] The first step, raw material preparation:

[0056] With embodiment 1;

[0057] The second step is to melt the raw materials to prepare master alloy ingots:

[0058] With embodiment 1;

[0059] The third step, preparation of Nd-Fe-B thin strip magnet:

[0060] The Nd obtained in the second step 11.36 Fe 81.17 B 5.67 al 0.54 Ni 0.40 co 0.74 Cu 0.09 Ti 0.01 Si 0.01 Nb 0.01 The master alloy ingot is loaded into the melt quenching furnace, and after remelting, the melt is quenched on the cooling molybdenum roller rotating at a peripheral speed of 20m / s, and the element composition is Nd 11.36 Fe 81.17 B 5.67 al 0.54 Ni 0.40 co 0.74 Cu 0.09 Ti 0.01 Si 0.01 Nb 0.01 Nd-Fe-B thin strip magnet products; the magnetic properties of the thin strip magnet products are: intrinsic coercivity: 296.6kA / m, remanence: 0.42T, magnetic energy product: 26.0kJ / m 3 , the thickness of the thin strip magnet product is 52 μm, and the average grain size of the main crystal pha...

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Abstract

The invention provides an Nd-Fe-B ribbon magnet and a preparation method for the same and relates to rare-earth-iron-based permanent magnet alloy. A general formula of composition elements of the Nd-Fe-B ribbon magnet is NdaFebBcAldNieCofCugTihSiiNbj; Alnico alloy of various amounts is added to the Nd-Fe-B alloy, which is equal to add multi-component Alnico alloy to the Nd-Fe-B alloy in a regular way; and an Nd-Fe-B ribbon magnet with the general formula of component element of NdaFebBcAldNieCofCugTihSiiNbj can be prepared by the method. A deficiency in the prior art can be overcome that after a single element is added, other performance is reduced or changed and further performance is way lower than a theoretical value when one or a limited number of performance of the magnet material is improved; and also, a deficiency of inconvenient post-research due to the lack of rules when various elements are added can be overcome.

Description

technical field [0001] The technical scheme of the invention relates to a rare earth iron-based permanent magnet alloy, specifically a Nd-Fe-B thin-strip magnet and a preparation method thereof. Background technique [0002] Nd-Fe-B series alloy is a rare earth iron-based series permanent magnet material, which has the characteristics of low price and high magnetic performance. In recent years, the application fields of NdFeB have been continuously expanded, especially with the development of the knowledge economy represented by the information industry, in addition to being widely used in computers, printers, mobile phones, household appliances, medical equipment, etc., the engine in the car , motors and sound systems are also particularly widely used. [0003] In order to further improve the magnetic properties of NdFeB permanent magnet materials, researchers currently use the method of rationally adding one or multiple other elements in NdFeB permanent magnet magnetic ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F41/02C22C38/32C22C38/30C22C38/02C22C38/22C22C38/28
CPCC22C38/005C22C38/02C22C38/22C22C38/28C22C38/30C22C38/32H01F1/0571H01F1/0577
Inventor 孙继兵刘帅步绍静殷福星朱安
Owner HEBEI UNIV OF TECH
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