CN105679482A - NdFeB permanent magnet material and preparation method thereof - Google Patents

NdFeB permanent magnet material and preparation method thereof Download PDF

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Publication number
CN105679482A
CN105679482A CN201610236136.1A CN201610236136A CN105679482A CN 105679482 A CN105679482 A CN 105679482A CN 201610236136 A CN201610236136 A CN 201610236136A CN 105679482 A CN105679482 A CN 105679482A
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China
Prior art keywords
permanent magnet
magnet material
preparation
weight
surplus
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CN201610236136.1A
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Chinese (zh)
Inventor
邓飞
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GANZHOU CHENGBO TECHNOLOGY SERVICE Co Ltd
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GANZHOU CHENGBO TECHNOLOGY SERVICE Co Ltd
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Priority to CN201610236136.1A priority Critical patent/CN105679482A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together

Abstract

The invention provides an NdFeB permanent magnet material and a preparation method thereof.The NdFeB permanent magnet material is prepared from, by weight, 29.5-32.75% of Pr-Nd, 0.98-1.48% of B, 0.5-2.5% of Ga, 0.4-0.6% of Dy, 0.2-0.8% of Al, 0.6-0.8% of Co and the balance Fe.Pr-Nd, B, Ga, Dy, Al, Co and Fe are smelted, cast into ingots and then smashed and ground into powder, and then die pressing, sintering, tempering, machining and surface treatment are conducted.The NdFeB permanent magnet material is high in Curie temperature point, temperature characteristics are effectively improved, pulverization corrosion is remarkably improved, the application range is wider, and the service life is longer.

Description

Nd-Fe-B permanent magnet material and preparation method thereof
Technical field:
The present invention relates to a kind of Nd-Fe-B permanent magnet material and preparation method thereof, belong to rare-earth permanent-magnet material technical field.
Background technology:
Nd-Fe-B permanent magnet is the one of neodymium-iron-boron magnetic material, is also called the latest result for rare earth permanent-magnetic material development, is referred to as " magnetic king " due to the magnetic property of its excellence. This is the product that National 863 high-tech plan is researched and developed. Nd-Fe-B permanent magnet has high magnetic energy product and strong power, the advantage of high-energy-density makes Nd-Fe-B permanent magnet material at modern industry simultaneously, it is applied widely in electronic technology and in medical industry, so that instrument and meter, electroacoustic motor, magnetic separation magnetization, medical apparatus and instruments, the miniaturization of equipment, lightweight, the slimming such as armarium are possibly realized. The advantage of Nd-Fe-B permanent magnet is that cost performance is high, has good mechanical property; Being disadvantageous in that Curie point is low, temperature characterisitic is poor, and is prone to dusting corrosion, it is necessary to by adjusting its chemical composition and taking surface treatment method so as to improved, can be only achieved the requirement of practical application.
Summary of the invention:
It is an object of the invention to provide a kind of Nd-Fe-B permanent magnet material and preparation method thereof for above-mentioned Problems existing, Nd-Fe-B permanent magnet material Curie point prepared by the present invention is high, temperature characterisitic effectively improves, dusting corrosion be improved significantly, make its range of application wider, longer service life.
Above-mentioned purpose is achieved through the following technical solutions:
A kind of Nd-Fe-B permanent magnet material, includes Pr-Nd:29.5%～32.75%, B:0.98%～1.48%, Ga:0.5-2.5%, Dy:0.4%～0.6%, Al:0.2%～0.8%, Co:0.6%～0.8% by weight, and surplus is Fe.
Described Nd-Fe-B permanent magnet material, includes Pr-Nd:30%～32%, B:1.01%～1.45%, Ga:0.6-2.4%, Dy:0.45%～0.55%, Al:0.3%～0.7%, Co:0.65%～0.75% by weight, and surplus is Fe.
Described Nd-Fe-B permanent magnet material, includes Pr-Nd:30%～32%, B:1.10%～1.30%, Ga:0.9-2.0%, Dy:0.50%～0.54%, Al:0.4%～0.6%, Co:0.68%～0.72% by weight, and surplus is Fe.
Described Nd-Fe-B permanent magnet material, includes Pr-Nd:31%, B:1.20%, Ga:1.50%, Dy:0.52%, Al:0.5%, Co:0.70% by weight, and surplus is Fe.
The preparation method of Nd-Fe-B permanent magnet material: the method is: by weight by Pr-Nd, B, Ga, Dy, Al, Co, Fe melting, ingot casting, being then passed through broken and powder process, mould die mould, sintering, tempering, machining and surface treatment.
The preparation method of described Nd-Fe-B permanent magnet material, described melting adopts vacuum induction melting, and vacuum reaches 10.2～more than 10.6Pa
The preparation method of described Nd-Fe-B permanent magnet material, it is 3～4 μm that described powder process adopts hydrogen to be crushed to granularity.
The preparation method of described Nd-Fe-B permanent magnet material, described sintering temperature is for being not less than 1100 DEG C.
The preparation method of described Nd-Fe-B permanent magnet material, described surface treatment refers to and carries out plating zinc on surface or Nickel Plating Treatment.
Beneficial effect:
1. the Nd-Fe-B permanent magnet material Curie point that prepared by the present invention is high, and temperature characterisitic effectively improves, dusting corrosion be improved significantly so that it is range of application is wider, longer service life.
2. the neodymium iron boron magnetic body of the present invention plates the metals such as last layer nickel or zinc or chemical substance just can come into operation after processing again; Make material corrosion resistance be improved significantly.
Detailed description of the invention:
Embodiment 1:
A kind of Nd-Fe-B permanent magnet material, includes Pr-Nd:29.5%, B:0.98%, Ga:0.5%, Dy:0.6%, Al:0.8%, Co:0.8% by weight, and surplus is Fe.
Embodiment 2:
A kind of Nd-Fe-B permanent magnet material, includes Pr-Nd:32.75%, B:1.48%, Ga:2.5%, Dy:0.4%, Al:0.2%, Co:0.6% by weight, and surplus is Fe.
Embodiment 3:
A kind of Nd-Fe-B permanent magnet material, includes Pr-Nd:32%, B:1.01%, Ga:2.4%, Dy:0.45%, Al:0.3%, Co:0.75% by weight, and surplus is Fe.
Embodiment 4:
A kind of Nd-Fe-B permanent magnet material, includes Pr-Nd:30%, B:1.45%, Ga:0.6%, Dy:0.55%, Al:0.7%, Co:0.65% by weight, and surplus is Fe.
Embodiment 5:
A kind of Nd-Fe-B permanent magnet material, includes Pr-Nd:32%, B:1.10%, Ga:2.0%, Dy:0.50%, Al:0.6%, Co:0.72% by weight, and surplus is Fe.
Embodiment 6:
A kind of Nd-Fe-B permanent magnet material, includes Pr-Nd:30%, B:1.30%, Ga:0.9%, Dy:0.54%, Al:0.4%, Co:0.68% by weight, and surplus is Fe.
Embodiment 7:
Described Nd-Fe-B permanent magnet material, includes Pr-Nd:31%, B:1.20%, Ga:1.50%, Dy:0.52%, Al:0.5%, Co:0.70% by weight, and surplus is Fe.
The preparation method of above-mentioned Nd-Fe-B permanent magnet material: the method is: by weight by Pr-Nd, B, Ga, Dy, Al, Co, Fe melting, ingot casting, being then passed through broken and powder process, mould die mould, sintering, tempering, machining and surface treatment.
The preparation method of described Nd-Fe-B permanent magnet material, described melting adopts vacuum induction melting, and vacuum reaches 10.2～more than 10.6Pa
The preparation method of described Nd-Fe-B permanent magnet material, it is 3～4 μm that described powder process adopts hydrogen to be crushed to granularity.
The preparation method of described Nd-Fe-B permanent magnet material, described sintering temperature is for being not less than 1100 DEG C.
The preparation method of described Nd-Fe-B permanent magnet material, described surface treatment refers to and carries out plating zinc on surface or Nickel Plating Treatment.
Below being only highly preferred embodiment of the present invention, the method for the present invention includes but not limited to above-described embodiment, the unaccomplished matter of the present invention, belongs to the known general knowledge of those skilled in the art.

Claims (9)

1. a Nd-Fe-B permanent magnet material, is characterized in that: including Pr-Nd:29.5%～32.75%, B:0.98%～1.48%, Ga:0.5-2.5%, Dy:0.4%～0.6%, Al:0.2%～0.8%, Co:0.6%～0.8% by weight, surplus is Fe.
2. Nd-Fe-B permanent magnet material according to claim 1, is characterized in that: include Pr-Nd:30%～32%, B:1.01%～1.45% by weight, Ga:0.6-2.4%, Dy:0.45%～0.55%, Al:0.3%～0.7%, Co:0.65%～0.75%, surplus is Fe.
3. Nd-Fe-B permanent magnet material according to claim 1, is characterized in that: include Pr-Nd:30%～32%, B:1.10%～1.30% by weight, Ga:0.9-2.0%, Dy:0.50%～0.54%, Al:0.4%～0.6%, Co:0.68%～0.72%, surplus is Fe.
4. Nd-Fe-B permanent magnet material according to claim 1, is characterized in that: including Pr-Nd:31%, B:1.20%, Ga:1.50%, Dy:0.52%, Al:0.5%, Co:0.70% by weight, surplus is Fe.
5. the preparation method of Nd-Fe-B permanent magnet material: it is characterized in that: the method is: by weight by Pr-Nd, B, Ga, Dy, Al, Co, Fe melting, an ingot casting, being then passed through broken and powder process, mould die mould, sintering, tempering, machining and surface treatment.
6. the preparation method of Nd-Fe-B permanent magnet material according to claim 5, is characterized in that: described melting adopts vacuum induction melting, and vacuum reaches 10.2～more than 10.6Pa
7. the preparation method of the Nd-Fe-B permanent magnet material according to claim 5 or 6, is characterized in that: it is 3～4 μm that described powder process adopts hydrogen to be crushed to granularity.
8. the preparation method of the Nd-Fe-B permanent magnet material according to claim 5 or 6, is characterized in that: described sintering temperature is for being not less than 1100 DEG C.
9. the preparation method of the Nd-Fe-B permanent magnet material according to claim 5 or 6, is characterized in that: described surface treatment refers to and carries out plating zinc on surface or Nickel Plating Treatment.
CN201610236136.1A 2016-04-18 2016-04-18 NdFeB permanent magnet material and preparation method thereof Pending CN105679482A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105849828A (en) * 2013-12-26 2016-08-10 丰田自动车株式会社 Method of manufacturing rare earth magnet
US10347418B2 (en) 2013-12-19 2019-07-09 Toyota Jidosha Kabushiki Kaisha Method of manufacturing rare earth magnet

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1251464A (en) * 1998-10-14 2000-04-26 日立金属株式会社 R-T-B series sintered permanent magnet
CN101589445A (en) * 2007-05-30 2009-11-25 信越化学工业株式会社 Process for producing highly anticorrosive rare earth permanent magnet and method of using the same
CN104064301A (en) * 2014-07-10 2014-09-24 北京京磁电工科技有限公司 NdFeB magnet and preparation method thereof
CN105355353A (en) * 2015-12-18 2016-02-24 江西金力永磁科技股份有限公司 Neodymium iron boron magnet and preparation method
CN105469973A (en) * 2014-12-19 2016-04-06 北京中科三环高技术股份有限公司 Preparation method of R-T-B permanent magnet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1251464A (en) * 1998-10-14 2000-04-26 日立金属株式会社 R-T-B series sintered permanent magnet
CN101589445A (en) * 2007-05-30 2009-11-25 信越化学工业株式会社 Process for producing highly anticorrosive rare earth permanent magnet and method of using the same
CN104064301A (en) * 2014-07-10 2014-09-24 北京京磁电工科技有限公司 NdFeB magnet and preparation method thereof
CN105469973A (en) * 2014-12-19 2016-04-06 北京中科三环高技术股份有限公司 Preparation method of R-T-B permanent magnet
CN105355353A (en) * 2015-12-18 2016-02-24 江西金力永磁科技股份有限公司 Neodymium iron boron magnet and preparation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10347418B2 (en) 2013-12-19 2019-07-09 Toyota Jidosha Kabushiki Kaisha Method of manufacturing rare earth magnet
CN105849828A (en) * 2013-12-26 2016-08-10 丰田自动车株式会社 Method of manufacturing rare earth magnet
US10242795B2 (en) 2013-12-26 2019-03-26 Toyota Jidosha Kabushiki Kaisha Method of manufacturing rare earth magnet

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Application publication date: 20160615

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