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Y-containing rare-earth permanent magnet alloy stripe-casting flake

A technology of rare earth permanent magnets and quick-setting sheets, which is applied in the fields of magnetic materials, magnetic objects, inductors/transformers/magnets, etc., can solve the problems of high-abundance rare earth Y backlog, high price, consumption, etc., achieve high performance, improve The effect of microstructure

Active Publication Date: 2017-07-28
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, due to the high price of light rare earth elements Nd, Pr and heavy rare earth elements Dy, Tb, etc., the price of NdFeB magnets remains high; on the other hand, the content of rare earth elements in the earth's crust is arranged in order of Ce, Y , La, Nd, Pr, Sm, Gd, Dy, Tb..., and the extensive use of rare earth permanent magnets leads to rapid consumption of Pr, Nd, Dy, Tb, resulting in a large backlog of high-abundance rare earth Y, etc. Lead to uneven utilization of rare earth resources

Method used

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  • Y-containing rare-earth permanent magnet alloy stripe-casting flake
  • Y-containing rare-earth permanent magnet alloy stripe-casting flake
  • Y-containing rare-earth permanent magnet alloy stripe-casting flake

Examples

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Effect test

Embodiment 1

[0029] In the present embodiment, the high-abundance rare earth permanent magnet alloy is expressed in mass percent, and its nominal composition is: (Nd 0.75 Y 0.25 ) 30.5 Al 0.1 Cu 0.1 Fe 68.3 B 1 .

[0030] The preparation method of the high-abundance rare earth permanent magnet alloy quick-setting sheet is as follows:

[0031] 1) Raw material preparation: smelt 2.5kg of alloy, mix the required raw materials according to the nominal composition, and polish the surface of the raw materials with an electric brush to remove oxide impurities;

[0032] 2) Rapid solidification: Clean the cavity of the vacuum induction melting furnace with high-purity argon for three times, and then vacuumize the cavity to (1~5)×10 -2 Pa, filled with high-purity argon to 0.05-0.1MPa; under the protection of argon, the alloy raw material is heated and melted and refined into a molten alloy. When the temperature of the molten alloy reaches 1300-1400°C, the molten alloy is poured through the t...

Embodiment 2

[0035] In this embodiment, the high-abundance rare earth permanent magnet alloy is expressed in mass percent, and its nominal composition is: [Nd 0.5 (Ce 0.4 Y 0.1 )] 30.5 Al 0.1 Cu 0.1 Fe 68.3 B 1 .

[0036] The preparation method of the high-abundance rare earth permanent magnet alloy quick-setting sheet is as follows:

[0037] 1) Raw material preparation: smelt 2.5kg of alloy, mix the required raw materials according to the nominal composition, and polish the surface of the raw materials with an electric brush to remove oxide impurities;

[0038] 2) Rapid solidification: Clean the cavity of the vacuum induction melting furnace with high-purity argon for three times, and then vacuumize the cavity to (1~5)×10 -2 Pa, filled with high-purity argon to 0.05-0.1MPa; under the protection of argon, the alloy raw material is heated and melted and refined into a molten alloy. When the temperature of the molten alloy reaches 1300-1400°C, the molten alloy is poured through the ...

Embodiment 3

[0042] In this embodiment, the high-abundance rare earth permanent magnet alloy is expressed in mass percent, and its nominal composition is: [Nd 0.5 (Ce 0.35 Y 0.15 )] 30.5 Al 0.1 Cu 0.1 Fe 68.3 B 1 .

[0043] The preparation method of the high-abundance rare earth permanent magnet alloy quick-setting sheet is as follows:

[0044] 1) Raw material preparation: smelt 2.5kg of alloy, mix the required raw materials according to the nominal composition, and polish the surface of the raw materials with an electric brush to remove oxide impurities;

[0045] 2) Rapid solidification: Clean the cavity of the vacuum induction melting furnace with high-purity argon for three times, and then vacuumize the cavity to (1~5)×10 -2Pa, filled with high-purity argon to 0.05-0.1MPa; under the protection of argon, the alloy raw material is heated and melted and refined into a molten alloy. When the temperature of the molten alloy reaches 1300-1400°C, the molten alloy is poured through the...

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Abstract

The invention provides a Y-containing rear-earth permanent magnet alloy stripe-casting flake. A Y element is added in rare earth alloy Re-Fe-B, an alloy quick-setting and throwing technology is adopted, and a texture composed of a main phase columnar crystal and an intergranular phase is obtained, wherein Y mainly enters a main phase to form a crystal structure of 2:14:1, and a poor Y area is formed in a rare earth-rich phase. According to alloy stripe-casting flake, by regulating the Y content, distribution of the rare earth element in the main phase columnar crystal and the intergranular phase in the stripe-casting flake can be effectively adjusted, a foundation is laid for a rear-earth permanent magnet good in subsequent preparation performance, and the cost of preparing the magnet subsequently can be lowered.

Description

technical field [0001] The invention belongs to the field of preparation of rare earth permanent magnet materials, in particular to a Y-containing rare earth permanent magnet alloy quick-setting sheet. Background technique [0002] The rare earth NdFeB permanent magnet material was developed in the early 1980s. It is called the "Magnetic King" because of its extremely high coercive force and the largest magnetic energy product. Various industries of the national economy such as automobiles are widely used. [0003] Up to now, light rare earth elements Nd, Pr and heavy rare earth elements Dy, Tb, etc. are still widely used in the preparation of NdFeB permanent magnets. On the one hand, due to the high price of light rare earth elements Nd, Pr and heavy rare earth elements Dy, Tb, etc., the price of NdFeB magnets remains high; on the other hand, the content of rare earth elements in the earth's crust is arranged in order of Ce, Y , La, Nd, Pr, Sm, Gd, Dy, Tb..., and the exte...

Claims

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Application Information

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IPC IPC(8): H01F1/057H01F41/02C22C38/06C22C38/16
CPCC22C38/005C22C38/06C22C38/16H01F1/057H01F41/0253H01F41/0293
Inventor 范晓东郭帅陈侃丁广飞陈仁杰闫阿儒李东
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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