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Rare earth magnet

A rare earth magnet and metal alloy technology, applied in the direction of magnetic materials, magnetic objects, inorganic material magnetism, etc., can solve the problems affecting the normal development of related industries, increasing production costs, affecting the profits and development of production enterprises, and improving quality stability. The uniformity of the magnetic field, the magnetic field strength, the strong corrosion resistance, and the effect of reducing the probability of product defects

Inactive Publication Date: 2014-05-28
NINGBO HONGLEI MAGNETICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current rare earth magnets are affected by the rising price of rare earths, and the production cost has been greatly increased, which not only affects the profits and development of production enterprises, but also affects the normal development of related industries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0016] The rare earth magnet disclosed in the present invention is mainly composed of the following elements, R: 26%, B: 0.90%, Al: 0.05%, Cu: 0.05%, Zr: 0.05%, Co: 1.5%, O: 0.05%, C: 0.05%, the balance is iron and unavoidable trace impurities, of which R is Y1.5%, Nd14%, Dy10.5%. The rare earth magnet is prepared by powder metallurgy technology, and the metal alloy powder is pulverized by an ultra-high-speed inert gas flow to an average particle size of 4 microns. Sample sampling standard column 1*1*1 In the experiment, when the deformation amount is 2%, the average coercive force is 56A / m; the average impact strength of the sample is 480MPa, and the average tensile elongation is 40%.

specific Embodiment 2

[0017] The rare earth magnet disclosed in the present invention is mainly composed of the following elements, R: 27.5%, B: 0.925%, Al: 0.125%, Cu: 0.75%, Zr: 0.125%, Co: 2.0%, O: 0.075%, C: 0.085%, the balance is iron and unavoidable trace impurities, of which R is Nd16%, Dy10%, Ga0.5%. The rare earth magnet is prepared by powder metallurgy technology, and the metal alloy powder is pulverized by an ultra-high-speed inert gas flow to an average particle size of 5 microns. Sample sampling standard column 1*1*1 In the experiment, when the deformation amount is 3%, the average coercive force is 52A / m; the average impact strength of the sample is 460MPa, and the average tensile elongation is 37%.

specific Embodiment 3

[0018] The rare earth magnet disclosed in the present invention is mainly composed of the following elements, R: 29%, B: 0.95%, Al: 0.20%, Cu: 0.10%, Zr: 0.20%, Co: 2.5%, O: 0.10%, C: 0.12%, the balance is iron and unavoidable trace impurities, of which R is Y1.3%, Nd16%, Dy11%, Ga0.7%. The rare earth magnet is prepared by powder metallurgy technology, and the metal alloy powder is pulverized by an ultra-high-speed inert gas flow to an average particle size of 6 microns. Sample sampling standard column 1*1*1 In the experiment, the average coercive force is 56A / m when the deformation amount is 2.5%; the average impact strength of the sample is 470MPa, and the average tensile elongation is 42%.

[0019] The rare earth magnet disclosed by the invention has good stability, high magnetic field strength, stable magnetism, long service life, strong corrosion resistance, and good weather resistance, which is beneficial to reduce the production cost of the magnet, and relatively increa...

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Abstract

The invention discloses a rare earth magnet which mainly comprises, by weight percentage, 26-29% of R, 0.90-0.95% of B, 0.05-0.20% of Al, 0.05-0.10% of Cu, 0.05-0.20% of Zr, 1.5-2.5% of Co, 0.05-0.10% of O, 0.05-0.12% of C, and the balance of iron and inevitable trace impurities, wherein R is one or more of Y, Nd, Dy and Ga. The rare earth magnet is good in magnetic stability, high in magnetic field strength, stable in magnetism, long in service life, high in corrosion resistance, good in weather resistance, and magnet production cost can be lowered favorably.

Description

[0001] technical field [0002] The invention relates to a magnet, especially a rare earth magnet. Background technique [0003] A magnet can generate a magnetic field to attract ferromagnetic substances such as iron, nickel, cobalt and other metals. Suspend the midpoint of the bar magnet with a thin wire. When it is at rest, its two ends will point to the south and north of the earth. The end pointing to the north is called the north pole or N pole, and the end pointing to the south is called the index pole or S pole. pole. If the earth is thought of as a large magnet, the current magnetic north pole of the earth is the compass pole, and the magnetic south pole of the earth refers to the north pole. Between magnets, like poles repel each other and opposite poles attract each other. Therefore, the guide pole and the guide pole repel each other, the reference pole and the reference pole repel each other, and the guide pole and the reference pole attract each other. Pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/053H01F1/08C22C38/16
Inventor 张孙云张宏芳
Owner NINGBO HONGLEI MAGNETICS
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