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Neodymium iron boron permanent magnet material and preparation method thereof

A permanent magnet material, neodymium iron boron technology, applied in the direction of magnetic materials, inductors/transformers/magnet manufacturing, magnetic objects, etc., can solve problems such as demagnetization, and achieve the goal of improving coercive force, temperature stability, and squareness Effect

Inactive Publication Date: 2019-11-26
宁波可可磁业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of new energy vehicles and high-end equipment, the performance requirements of NdFeB materials are getting higher and higher, especially the equipment or devices made of permanent magnet materials are generally impossible to work at a constant temperature, the traditional pure NdFeB Boron magnetic materials demagnetize with the increase of temperature. Therefore, in order to meet the application requirements of high-end equipment, it is necessary to improve the high temperature resistance and magnetic properties of NdFeB permanent magnet materials. Low point, high coercive force products

Method used

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  • Neodymium iron boron permanent magnet material and preparation method thereof
  • Neodymium iron boron permanent magnet material and preparation method thereof
  • Neodymium iron boron permanent magnet material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: A kind of NdFeB permanent magnet material, the permanent magnet material comprises the following components by weight percentage: neodymium 30%, niobium 2%, cobalt 2.5%, zinc 0.15%, gallium 0.2%, boron 2.5%, tungsten 0.1% %, thulium oxide superfine powder 2.5%, and the balance is iron.

[0038] Its preparation method, such as figure 1 shown, including the following steps:

[0039] Step 1, weighing and batching: Weigh the following raw materials respectively, 30kg of neodymium, 2kg of niobium, 2.5kg of cobalt, 0.15kg of zinc, 0.2kg of gallium, 2.5kg of boron, 0.1kg of tungsten, 2.5kg of ultrafine powder of thulium oxide, iron 60.05 kg.

[0040]Step 2. Smelting: first put all the components in step 1 into the smelting furnace, then evacuate to below 1Pa, start heating, continue to evacuate (air) while heating, as the temperature rises, the gas in the adsorption state, The water is gradually desorbed and drawn out until the charge is generally dark red. Cl...

Embodiment 2

[0048] Embodiment 2: a kind of neodymium-iron-boron permanent magnet material, permanent magnet material comprises the following components by weight percentage: neodymium 36%, niobium 2.2%, cobalt 3%, zinc 0.18%, gallium 0.3%, boron 3%, tungsten 0.2% %, thulium oxide superfine powder 3%, and the balance is iron.

[0049] Step 1. Weighing and batching: Weigh the following raw materials respectively, 36kg of neodymium, 2.2kg of niobium, 3kg of cobalt, 0.18kg of zinc, 0.3kg of gallium, 3kg of boron, 0.2kg of tungsten, 3kg of ultrafine powder of thulium oxide, and 52.12kg of iron .

[0050] Step 2. Smelting: first put all the components in step 1 into the smelting furnace, then evacuate to below 1Pa, start heating, continue to evacuate (air) while heating, as the temperature rises, the gas in the adsorption state, The water is gradually desorbed and drawn out until the charge is generally dark red. Close the valve and fill with argon gas, increase the power to heat up to the com...

Embodiment 3

[0058] Embodiment 3: a kind of neodymium-iron-boron permanent magnet material, permanent magnet material comprises the following components by weight percentage: neodymium 45%, niobium 2.5%, cobalt 4.2%, zinc 0.2%, gallium 0.5%, boron 4.8%, tungsten 0.5% %, thulium oxide superfine powder 4%, and the balance is iron.

[0059] Step 1, weighing and batching: Weigh the following raw materials respectively, 45kg of neodymium, 2.5kg of niobium, 4.2kg of cobalt, 0.2kg of zinc, 0.5kg of gallium, 4.8kg of boron, 0.5kg of tungsten, 4kg of ultrafine powder of thulium oxide, iron 38.3 kg.

[0060] Step 2. Smelting: first put all the components in step 1 into the smelting furnace, then evacuate to below 1Pa, start heating, continue to evacuate (air) while heating, as the temperature rises, the gas in the adsorption state, The water is gradually desorbed and drawn out until the charge is generally dark red. Close the valve and fill with argon gas, increase the power to heat up to the compl...

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Abstract

The invention discloses a neodymium iron boron permanent magnet material and a preparation method thereof, and belongs to the technical field of permanent magnet materials. The neodymium iron boron permanent magnet material is technically characterized by comprising the following components in percentage by weight: 30-45% of neodymium, 2-2.5% of niobium, 2.5-4.2% of cobalt, 0.15-0.2% of zinc, 0.2-0.5% of gallium, 2.5-4.8% of boron, 0.1-0.5% of tungsten, 2.5-4% of thulium oxide and the balance of iron. The preparation method of the neodymium iron boron permanent magnet material comprises the following steps: weighing and dosing, smelting, pulverizing, magnetic field magnetizing, briquetting, high-temperature sintering, high-temperature tempering, low-temperature tempering, inspection, packaging and warehousing. The coercive force of the neodymium iron boron permanent magnet material is effectively improved, so that the neodymium iron boron permanent magnet material has excellent performances of improving the square degree and improving the temperature stability.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet materials, and more specifically relates to an NdFeB permanent magnet material and a preparation method thereof. Background technique [0002] High-grade sintered NdFeB usually refers to materials with high remanence. The remanence of the material directly determines the performance of the final product after the material is processed into a finished product. With the continuous expansion of the application field of the material, the requirements for the remanence of the material Higher and higher. [0003] Due to its excellent performance (high remanence, high coercive force, high magnetic energy product), NdFeB permanent magnet materials have become an indispensable and important material basis in the field of modern science and technology, and the demand for NdFeB has been greatly increased. . With the development of new energy vehicles and high-end equipment, the performance require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F41/02C22C38/12C22C38/10C22C33/04C22C33/02C21D6/00
CPCC21D6/007C22C33/006C22C33/0278C22C33/04C22C38/002C22C38/005C22C38/10C22C38/12H01F1/0577H01F41/0253H01F41/0266
Inventor 冯立峰
Owner 宁波可可磁业股份有限公司
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