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Neodymium iron boron magnetic material with excellent magnetic performance

A magnetic material, neodymium iron boron technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems affecting the number of main phases of ingots, insufficient performance of neodymium iron boron magnets, and adverse effects of processing technology. Achieve the effects of magnet performance and coercive force performance improvement, low final oxygen content, and avoid performance damage

Inactive Publication Date: 2014-03-05
NINGBO STAR MATERIALS HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still many deficiencies in the sintering of NdFeB magnets at this stage. Specifically, in the process of smelting NdFeB ingots, a large amount of α-Fe phase is precipitated due to insufficient technology, which will not only affect the main phase in the ingot Quantity, and will have adverse effects on the subsequent processing technology, and at the same time, the requirements for the performance of NdFeB magnets in various fields are different, making the performance of some NdFeB magnets insufficient to meet the related work

Method used

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  • Neodymium iron boron magnetic material with excellent magnetic performance
  • Neodymium iron boron magnetic material with excellent magnetic performance
  • Neodymium iron boron magnetic material with excellent magnetic performance

Examples

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Embodiment 1

[0069] A neodymium-iron-boron magnetic material with excellent magnet performance, which is formed by mixing a main phase alloy and an auxiliary phase alloy; the main phase alloy is configured by weight percentage of the following raw materials: 64.5% iron, 1.2% boron, Neodymium 34.1%, niobium 0.1%, aluminum 0.1%; auxiliary phase alloy is prepared from the following raw materials by weight percentage: iron 53.8%, boron 1.2%, neodymium 19.5%, praseodymium 14.3%, dysprosium 10.2%, copper 1.0%.

[0070] In the above scheme, the niobium in the main phase alloy can make the crystal grains of the magnet uniform and increase the density of the magnet, so a small amount of niobium added can obviously refine the grains of the alloy, thereby increasing the remanence and magnetic energy product of the magnet; and Aluminum can improve the wettability of the liquid phase and the main phase during the sintering process, make the grain surface smoother, and refine the grains of the main phase...

Embodiment 2

[0128] A neodymium-iron-boron magnetic material with excellent magnet properties, which is formed by mixing a main phase alloy and an auxiliary phase alloy; the main phase alloy is configured by weight percentage of the following raw materials: 68.2% iron, 1.2% boron, Neodymium 30.2%, niobium 0.2%, aluminum 0.2%; auxiliary phase alloy is prepared by the following raw materials by weight percentage: iron 54.2%, boron 0.8%, neodymium 20.2%, praseodymium 13.4%, dysprosium 10.6%, copper 0.8%.

[0129]In the above scheme, the niobium in the main phase alloy can make the crystal grains of the magnet uniform and increase the density of the magnet, so a small amount of niobium added can obviously refine the grains of the alloy, thereby increasing the remanence and magnetic energy product of the magnet; and Aluminum can improve the wettability of the liquid phase and the main phase during the sintering process, make the grain surface smoother, and refine the grains of the main phase, th...

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Abstract

The invention discloses a neodymium iron boron magnetic material with the excellent magnetic performance. The neodymium iron boron magnetic material with the excellent magnetic performance is formed by a main-phase alloy and a secondary-phase alloy through mixing. The main-phase alloy comprises, by weight, 64.5-68.5% of iron, 1.0-1.2% of boron, 30.2-34.3% of neodymium, 0.05-0.4% of niobium and 0.1-0.4% of aluminum. The secondary-phase alloy comprises, by weight, 50.8-54.2% of iron, 0.8-1.2% of boron, 18.9-21.1% of neodymium, 12.8-16.3% of praseodymium, 8.9-11.1% of dysprosium and 0.8-1.2% of copper. The neodymium iron boron magnetic material prepared with the method has the excellent magnetic performance and high intrinsic coercivity.

Description

technical field [0001] The invention relates to a magnetic material and a production process thereof, in particular to a neodymium-iron-boron magnetic material with excellent magnet properties and a production process thereof. Background technique [0002] NdFeB magnetic materials, as the latest result of the development of rare earth permanent magnet materials, are widely used due to their excellent magnetic properties. However, there are still many deficiencies in the sintering of NdFeB magnets at this stage. Specifically, in the process of smelting NdFeB ingots, a large amount of α-Fe phase is precipitated due to insufficient technology, which will not only affect the main phase in the ingot Quantity, and will have adverse effects on the subsequent processing technology, and at the same time, the performance requirements of NdFeB magnets in various fields are different, making the performance of some NdFeB magnets insufficient to meet related work. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F1/08C22C38/12C22C38/16C22C33/04C22C33/02C21D1/26C21D6/00B22F9/04
Inventor 苏广春关井和陈益明
Owner NINGBO STAR MATERIALS HI TECH
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