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Neodymium iron boron permanent magnetic material using zirconium to substitute niobium

A permanent magnet material, neodymium iron boron technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., to achieve the effect of reducing the cost of raw materials

Active Publication Date: 2008-09-03
NINGBO KETIAN MAGNET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN1986856A mentions that adding Nb, Zr, Ti and other metals to the NdFeB quick-quenching permanent magnet alloy will change its microstructure, make the crystal fine and uniform in grain size, increase the coercive force of the magnet, and improve the temperature stability , but there is no report on the use of zirconium instead of niobium to manufacture sintered NdFeB permanent magnet alloys

Method used

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  • Neodymium iron boron permanent magnetic material using zirconium to substitute niobium
  • Neodymium iron boron permanent magnetic material using zirconium to substitute niobium
  • Neodymium iron boron permanent magnetic material using zirconium to substitute niobium

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Experimental program
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Effect test

Embodiment 1

[0008] Ingredients: according to the following composition ratio weight ingredients, praseodymium neodymium alloy 30.2% by weight, gadolinium 2.0% by weight, boron element 1.03% by weight, aluminum 0.64% by weight, zirconium 0.3% by weight, copper 0.02% by weight, the balance is iron and other impurities , wherein in the praseodymium neodymium alloy, praseodymium accounts for 25% by weight, neodymium accounts for 75% by weight, boron element is added in the state of BFe alloy, the boron content is 19%, and the iron content is 81%; Gadolinium element is added in the state of GdFe alloy, and the content of gadolinium is 75%, iron content is 25%;

[0009] Take smelting 100 kg NdFeB alloy as an example:

[0010]

[0011] The metal raw materials described in the above table are loaded into the vacuum induction furnace.

[0012] Melting and casting: After loading into the vacuum induction furnace, evacuate the air in the vacuum induction furnace to less than 1Pa, start heating a...

Embodiment 2

[0028] Ingredients: according to the following weight ratio ingredients, praseodymium neodymium alloy 31% by weight, gadolinium 2.5% by weight, boron 1.02% by weight, aluminum 0.64% by weight, zirconium 0.1% by weight, copper 0.02% by weight, and the balance is iron and other impurities , wherein in the praseodymium-neodymium alloy, praseodymium is 25% by weight, and neodymium is 75% by weight; boron element is added in the state of BFe alloy, and the boron content is 19%, and the iron content is 81%; gadolinium element is added in the state of GdFe alloy, and the content of gadolinium is 75%, iron content is 25%;

[0029] Take smelting 100 kg NdFeB alloy as an example:

[0030]

[0031] Put the metal raw materials described in the above table into the vacuum induction furnace;

[0032] Melting and casting: After loading into the vacuum induction furnace, evacuate the air in the vacuum induction furnace to less than 1Pa, start heating and melting, when the ingredients in t...

Embodiment 3

[0048] Ingredients: according to the following composition ratio weight ingredients, praseodymium neodymium alloy 30.5% by weight, gadolinium 2% by weight, boron element 1.02% by weight, aluminum 0.64% by weight, zirconium 0.5% by weight, copper 0.02% by weight, the balance is iron and other impurities , wherein in the praseodymium neodymium alloy, praseodymium is 25% by weight, neodymium is 75% by weight, boron element is added in BFe alloy state, boron content is 19%, iron content is 81%; Gadolinium element is added in GdFe alloy state, gadolinium content is 75% with 25% iron content;

[0049] Take the smelting of 100 kg NdFeB alloy as an example:

[0050]

[0051] Put the metal raw materials described in the above table into the vacuum induction furnace;

[0052] Melting and casting: After loading into the vacuum induction furnace, evacuate the air in the vacuum induction furnace to less than 1Pa, start heating and melting, when the ingredients in the furnace turn red, ...

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Abstract

The invention relates to a NdFeB permanent material whose Nb is replaced by Zr, and constituents are: (28-35)% Pr-Nd alloy, (1-10)% Gd, (0.1-0.5)% Zr, (0.95- 1.3)% B, (0.1-1.5)% Al, (0.01-0.3)% Cu, Fe and inevitable impurities which are the rest, wherein, the percentages below are weight percentages. The metal element Zr is added so as to replace the Nb in the NdFeB alloy by adjusting the constituents of the alloy. The invention uses Zr which is a plentiful resource in our country to replace the rare metal Nb with high melting point, so that the cost of material is reduced under the condition of that the magnetic performance is not reduced, and the addition of Zr is significantly less than that of Nb, but the NdFeB alloy material with the same magnetic performance can also be obtained.

Description

technical field [0001] The invention relates to a neodymium-iron-boron permanent magnet material, in particular to a sintered neodymium-iron-boron permanent magnet material in which niobium is replaced by zirconium. Background technique [0002] Rare earth permanent magnet NdFeB is a new type of magnetic material developed in the 1980s. It has excellent characteristics such as high remanence, high energy product, high coercive force and high cost performance. It is the most magnetic permanent magnet today and is known as The magnet king among permanent magnet materials. However, the magnetic properties of ternary NdFeB alloys are not ideal, and the intrinsic coercive force is low, only about 1 / 10 of the theoretical anisotropy field; due to the sensitivity to sintering temperature, abnormally long grains often occur during the sintering process. big phenomenon. Adding alloying elements can effectively solve the above problems. In NdFeB alloy, the addition of niobium can ef...

Claims

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Application Information

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IPC IPC(8): H01F1/057
Inventor 王育平郑敦敦
Owner NINGBO KETIAN MAGNET
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