Production method for low-energy-consumption neodymium-iron-boron magnetic material

A magnetic material, neodymium iron boron technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of low magnetoelectric conversion efficiency, low magnetic induction intensity, poor temperature stability, etc., to improve saturation magnetization and correction The effect of coercive force, high magnetic induction, and good magnetic properties

Active Publication Date: 2015-08-19
佛山市福斯曼医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, due to the poor temperature stability, low magnetic induction and low internal resistance of NdFeB magnetic materials in the application process, there are low magnetoelectric conversion efficiency and high manufacturing costs in various electrical equipment used. High energy consumption defect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The permanent magnet material prepared in this embodiment has the following alloy composition: (Y 0.46 Nd 0.54 ) 25 (Fe 0.77 Ni 0.2 Si 0.03 ) 71.5 B 1.5 Nb 2 .

[0020] After the raw materials such as Y, Nd, Fe, Ni, Si, B, and Nb are prepared according to the above proportion, they are put into the copper crucible (water-cooled) of the electric arc furnace at the same time, and the electric arc furnace cavity is closed and vacuumed to 10 -4 mbar, continuous scrubbing twice, each scrubbing is filled with high-purity Ar gas at a pressure of 500mbar, after the scrubbing is completed, the cavity is filled with high-purity Ar gas 600mbar, and the alloy liquid is continuously stirred with an electric arc during the smelting process to make it fully The melting is uniform. After the current is turned off and the alloy liquid is cooled, the alloy ingot is turned upside down with a manipulator, and the above steps are repeated, and the melting is repeated 5 times. After cooling, the ...

Embodiment 2

[0026] The permanent magnet material prepared in this embodiment has the following alloy composition: (Y 0.53 Nd 0.47 ) 28 (Fe 0.73 Ni 0.22 Si 0.05 ) 65.4 B 1.8 Nb 5 .

[0027] After the raw materials such as Y, Nd, Fe, Ni, Si, B, and Nb are prepared according to the above proportion, they are put into the copper crucible (water-cooled) of the electric arc furnace at the same time, and the electric arc furnace cavity is closed and vacuumed to 10 -5 mbar, continuous scrubbing 3 times, each scrubbing is filled with high-purity Ar gas at a pressure of 600mbar. After the scrubbing is completed, the cavity is filled with high-purity Ar gas 700mbar. During the melting process, the alloy liquid is continuously stirred with an electric arc to make it full The melting is uniform. After the current is turned off and the alloy liquid is cooled, the alloy ingot is turned upside down with a manipulator, and the above steps are repeated for a total of 6 repetitive melting. After cooling, a maste...

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Abstract

The invention discloses a production method for low-energy-consumption neodymium-iron-boron magnetic material. The permanent magnet material comprises an alloy component of (YxNd1-x)a(Fe1-y-zNiySiz)100-a-b-cBbNbc, wherein the x ranges from 0.46 to 0.53, the y ranges from 0.20 to 0.22, the z ranges from 0.03 to 0.05, the a ranges from 25 to 28, the b ranges from 1.5 to 1.8 and the c ranges from 2 to 5. The production method has the advantages that Nd is replaced by Y through doping, and proper raw material proportions are set, so that saturation magnetization and coercivity of the permanent magnet material are improved while production cost is reduced, and the problems of low saturation magnetization and coercivity both caused by excessive rare earth elements Y and non-magnetic contents B in existing magnetic materials are solved; the magnetic energy product of a magnet is improved by a secondary compaction process, a secondary tempering process is adopted during sintering, and accordingly, the coercivity of the material is further improved; silicon high in electrical resistivity is doped in the material to improve internal resistance of the material, and magnetic density is improved effectively through secondary pressurization of the magnetic material, so that the magnetic material has high temperature stability and magnetic induction intensity and has much lower power loss than the prior art.

Description

Technical field [0001] The invention relates to a preparation method of a low energy consumption NdFeB magnetic material. Background technique [0002] Magnetic materials have the function of converting mechanical energy (information) and electromagnetic energy (information), and have been widely used in high-tech fields such as computers, network information, communications, aerospace, transportation, office automation, home appliances, and human health and health care. , and has become one of the important material foundations for high-tech, emerging industries and social progress. In recent years, the application of rare earth permanent magnets has made permanent magnet synchronous motors (PMSM) with simple structure, high power factor and large starting torque gradually replace traditional electric excitation motors in various industrial fields. Demand for materials soared. [0003] NdFeB magnetic material products are typical energy-saving and material-saving products...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F1/08B22F3/16B22F3/24
Inventor 唐海峰
Owner 佛山市福斯曼医疗科技有限公司
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