CN102447315B - Neodymium-iron-boron magnet used by high speed electric machine - Google Patents
Neodymium-iron-boron magnet used by high speed electric machine Download PDFInfo
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- CN102447315B CN102447315B CN201110347368.1A CN201110347368A CN102447315B CN 102447315 B CN102447315 B CN 102447315B CN 201110347368 A CN201110347368 A CN 201110347368A CN 102447315 B CN102447315 B CN 102447315B
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Abstract
The invention discloses a neodymium-iron-boron magnet used by high speed electric machine. The neodymium-iron-boron magnet comprises components in accordance with atomic percentage: Nd: 6.7-10.2%, Dy: 5.5-8.0%, B: 3.5-5.0%, Co: 7.0-8.5%, Cu: 1.8-2.3%, Ti: 0.01-0.1%, Si: 0.5-2.0% and rest being Fe and unavoidable impurities.
Description
Technical field
The present invention relates to motor permanent magnetic material field, particularly a kind of neodymium-iron-boron magnet used by high speed.
Background technology
Sintered NdFeB permanent magnets belongs to third generation rare earth permanent-magnetic material, compared with other types permanent magnetic material, has magnetic property high, and price is low waits outstanding advantages, makes its development and application obtain unconventional development.Its comprehensive magnetic can reach higher level at present, and application has related to the every field of national economy, is particularly widely used on motor.
Sintered NdFeB is as a kind of functional material, and the research emphasis of scientific and technical personnel is placed on always and how improves on its magnetic property, through the development of 24 years, has achieved breakthrough progress.Commercial product maximum magnetic energy product reaches 414-438kJ/m
3(52-55MGOe), along with improving constantly of Sintered NdFeB rare earth permanent magnet magnetic property, the shortcoming of its mechanical property has become its deadly defect, greatly limit the further expansion of application.Tension, the bending strength of rare earth permanent-magnetic material are all lower, and compression strength is higher; And its fracture toughness K
iC1 ~ 2 order of magnitude lower than ordinary metallic material is suitable with the fracture toughness of ceramic material.Obdurability official post rare-earth permanent magnet easily ftractures, falls slag in the course of processing, and this greatly reduces rate of finished products and the machining accuracy of magnet, improves the processing cost of magnet, limits the application of magnet on high-precision motor.Meanwhile, because the obdurability of rare earth permanent-magnetic material is poor, antidetonation, impact resistance are corresponding also poor, material are also being restricted, the fields such as such as high-speed electric expreess locomotive to the application of the higher occasion of antidetonation, anti-impact force requirement.In recent years, the mechanical characteristic of NdFeB rare-earth permanent magnet more and more receives publicity, and the obdurability how improving Sintered NdFeB rare-earth permanent magnet has become extremely urgent important topic.
Summary of the invention
For the deficiencies in the prior art, an object of the present invention is to provide a kind of neodymium-iron-boron magnet used by high speed, and this material, under the prerequisite keeping neodymium iron boron magnetic body magnetic property, improves its obdurability, makes it be suitable for the user demand of high-speed electric expreess locomotive.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of neodymium-iron-boron magnet used by high speed, this ndfeb magnet consists of Nd:6.7% ~ 10.2%, Dy:5.5% ~ 8.0%, B:3.5% ~ 5.0%, Co:7.0% ~ 8.5%, Cu:1.8% ~ 2.3%, Ti:0.01% ~ 0.1%, Si:0.5% ~ 2.0% by atomic percent, and surplus is Fe and inevitable impurity.
Preferably, this ndfeb magnet consists of Nd:7.5% ~ 9.5%, Dy:6.5% ~ 7.5%, B:4% ~ 4.5%, Co:7.5% ~ 8.0%, Cu:2.0% ~ 2.2%, Ti:0.04% ~ 0.06%, Si:0.9% ~ 1.6% by atomic percent, and surplus is Fe and inevitable impurity.
Most preferably, this ndfeb magnet consists of Nd:8.5%, Dy:7.0%, B:4.3%, Co:7.8%, Cu:2.1%, Ti:0.05%, Si:1.3% by atomic percent, and surplus is Fe and inevitable impurity.
The present invention, by adding Co, Cu, Ti, Si in neodymium iron boron, makes grain refinement or crystal boundary Strengthening and Toughening, thus reaches the object improving magnet obdurability.The alloying element added is organized between crystal boundary in NbFeB sintered base principal phase and is formed new phase constitution, effectively improves the coercive force of magnet and the domain structure intensity of crystal boundary, significantly improves the heat-resisting quantity of neodymium iron boron magnetic body and the corrosion resistance of material.The elements such as Dy, Co, Cu, Ti improve the interatomic interaction of magnet, improve each diversity field of magnet, form disperse phase in the alloy, thus improve the obdurability of ndfeb magnet.
Nd-Fe-B permanent magnet of the present invention can adopt conventional melting, fragmentation, compacting, sintering, ageing stage to be prepared.
Beneficial effect of the present invention is:
The bending strength of NdFeB material of the present invention can reach 400 ~ 460MPa, fracture toughness K
iC4.0 ~ 5.5MPam can be reached
1/2, therefore can meet the demand of high-speed electric expreess locomotive to neodymium iron boron magnetic body obdurability.
Embodiment
Embodiment one
A kind of neodymium-iron-boron magnet used by high speed, this NdFeB material consists of Nd:6.7%, Dy:8.0%, B:3.5%, Co:8.5%, Cu:1.8%, Ti:0.1%, Si:0.5% by atomic percent, and surplus is Fe and inevitable impurity.
Embodiment two
A kind of neodymium-iron-boron magnet used by high speed, this NdFeB material consists of Nd:10.2%, Dy:5.5%, B:5.0%, Co:7.0%, Cu:2.3%, Ti:0.01%, Si:2.0% by atomic percent, and surplus is Fe and inevitable impurity.
Embodiment three
A kind of neodymium-iron-boron magnet used by high speed, this NdFeB material consists of Nd:8.3%, Dy:7.0%, B:4.4%, Co:7.8%, Cu:2.1%, Ti:0.05%, Si:1.2% by atomic percent, and surplus is Fe and inevitable impurity.
Embodiment four
A kind of neodymium-iron-boron magnet used by high speed, this ndfeb magnet consists of Nd:7.5%, Dy:7.5%, B:4%, Co:8.0%, Cu:2.0%, Ti:0.06%, Si:0.9% by atomic percent, and surplus is Fe and inevitable impurity.
Embodiment five
A kind of neodymium-iron-boron magnet used by high speed, this ndfeb magnet consists of Nd:9.5%, Dy:6.5%, B:4.5%, Co:7.5%, Cu:2.2%, Ti:0.04%, Si:1.6% by atomic percent, and surplus is Fe and inevitable impurity.
Applicant states, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, namely do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of auxiliary element, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.
Claims (2)
1. a neodymium-iron-boron magnet used by high speed, it is characterized in that, this ndfeb magnet consists of Nd:7.5% ~ 9.5%, Dy:6.5% ~ 7.5%, B:4% ~ 4.5%, Co:7.5% ~ 8.0%, Cu:2.0% ~ 2.2%, Ti:0.04% ~ 0.06%, Si:0.9% ~ 1.6% by atomic percent, and surplus is Fe and inevitable impurity.
2. a kind of neodymium-iron-boron magnet used by high speed as claimed in claim 1, it is characterized in that, this ndfeb magnet consists of Nd:8.5%, Dy:7.0%, B:4.3%, Co:7.8%, Cu:2.1%, Ti:0.05%, Si:1.3% by atomic percent, and surplus is Fe and inevitable impurity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110347368.1A CN102447315B (en) | 2011-11-04 | 2011-11-04 | Neodymium-iron-boron magnet used by high speed electric machine |
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| CN201110347368.1A CN102447315B (en) | 2011-11-04 | 2011-11-04 | Neodymium-iron-boron magnet used by high speed electric machine |
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| CN102447315A CN102447315A (en) | 2012-05-09 |
| CN102447315B true CN102447315B (en) | 2015-02-11 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206371A (en) * | 2015-10-13 | 2015-12-30 | 南通长江电器实业有限公司 | Rare earth permanent magnetic material with low cost and high coercive force |
| CN110428947B (en) * | 2019-07-31 | 2020-09-29 | 厦门钨业股份有限公司 | Rare earth permanent magnetic material and raw material composition, preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1132399A (en) * | 1995-03-27 | 1996-10-02 | 北京科技大学 | Double-phase rare-earth-iron-boron magnetic powder and its prepn. method |
| CN1210344A (en) * | 1997-08-30 | 1999-03-10 | 中国科学院金属研究所 | Nd-Fe-B nano permanent magnetic material |
| CN1279485A (en) * | 1999-06-11 | 2001-01-10 | 精工爱普生株式会社 | Magnetic powder and isotropic magnet |
| CN1326830A (en) * | 2000-04-12 | 2001-12-19 | 精工爱普生株式会社 | Magnet material producing method, thin belt magnet material, powder magnet material and binded magnet |
| CN1961388A (en) * | 2003-12-31 | 2007-05-09 | 代顿大学 | Nanocomposite permanent magnets |
| CN101110289A (en) * | 2005-07-22 | 2008-01-23 | 信越化学工业株式会社 | Rare earth permanent magnet, its manufacturing method, and permanent magnet rotary machine |
-
2011
- 2011-11-04 CN CN201110347368.1A patent/CN102447315B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1132399A (en) * | 1995-03-27 | 1996-10-02 | 北京科技大学 | Double-phase rare-earth-iron-boron magnetic powder and its prepn. method |
| CN1210344A (en) * | 1997-08-30 | 1999-03-10 | 中国科学院金属研究所 | Nd-Fe-B nano permanent magnetic material |
| CN1279485A (en) * | 1999-06-11 | 2001-01-10 | 精工爱普生株式会社 | Magnetic powder and isotropic magnet |
| CN1326830A (en) * | 2000-04-12 | 2001-12-19 | 精工爱普生株式会社 | Magnet material producing method, thin belt magnet material, powder magnet material and binded magnet |
| CN1961388A (en) * | 2003-12-31 | 2007-05-09 | 代顿大学 | Nanocomposite permanent magnets |
| CN101110289A (en) * | 2005-07-22 | 2008-01-23 | 信越化学工业株式会社 | Rare earth permanent magnet, its manufacturing method, and permanent magnet rotary machine |
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| CN102447315A (en) | 2012-05-09 |
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