CN105405562A - Neodymium-iron-boron magnet - Google Patents

Neodymium-iron-boron magnet Download PDF

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Publication number
CN105405562A
CN105405562A CN201510870246.9A CN201510870246A CN105405562A CN 105405562 A CN105405562 A CN 105405562A CN 201510870246 A CN201510870246 A CN 201510870246A CN 105405562 A CN105405562 A CN 105405562A
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CN
China
Prior art keywords
neodymium
iron
plating layer
boron magnet
iron boron
Prior art date
Application number
CN201510870246.9A
Other languages
Chinese (zh)
Inventor
史磊
孙斌
Original Assignee
中磁科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中磁科技股份有限公司 filed Critical 中磁科技股份有限公司
Priority to CN201510870246.9A priority Critical patent/CN105405562A/en
Publication of CN105405562A publication Critical patent/CN105405562A/en

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Abstract

The invention discloses a neodymium-iron-boron magnet. The neodymium-iron-boron magnet comprises a neodymium-iron-boron base body and an alloy plating layer, wherein the alloy plating layer is electroplated on the surface of the neodymium-iron-boron base body; the alloy plating layer comprises a first plating layer and a second plating layer from inside to outside, wherein the first plating layer is an Ni-Cu-Ni layer, and the second plating layer is an Sn layer. The alloy plating layer of the neodymium-iron-boron magnet is low in porosity, and the salt fog resistance, the oxidative resistance, the corrosion resistance and the durability are all improved; the neodymium-iron-boron magnet is also excellent in the welding function; and the surface of the neodymium-iron-boron magnet is smooth without being contaminated by dust, and is non-reflective, so that the overall texture of the neodymium-iron-boron magnet is enhanced.

Description

Neodymium iron boron magnetic body

Technical field

The present invention relates to a kind of magnetic material, particularly a kind of neodymium iron boron magnetic body.

Background technology

Neodymium-iron-boron magnetic material is as a kind of permanent magnetic material of extrahigh energy density, be widely used in every field, as electric motor car, wind power generation, nulcear magnetic resonance (NMR), industrial magneto, electronic equipment, magnetic machinery etc., the application of neodymium-iron-boron magnetic material in recent years achieves the development of advancing by leaps and bounds.

But existing neodymium-iron-boron magnetic material is easy to be corroded by oxygen in air and acid solution, in order to make it durable in use, or surface treatment method must be taked to make it to be improved, just the requirement of practical application can be reached by its chemical composition of adjustment.At present, neodymium-iron-boron magnetic material manufacturing industry generally adopts plated metal, plating adds the methods such as chemical plating metal, electrophoretic coating and phosphorating treatment and carries out surface treatment to it, even if but after these process, the salt fog resistance performance of neodymium-iron-boron magnetic material is not very strong, make it cannot be applied to extreme corrosion operational environment, such as offshore wind farm, deep submersible pump field etc.

The information being disclosed in this background technology part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.

Summary of the invention

An object of the present invention is to provide a kind of neodymium iron boron magnetic body, thus overcomes the shortcoming of neodymium iron boron magnetic body salt fog resistance poor performance of the prior art.

For achieving the above object, the invention provides a kind of neodymium iron boron magnetic body, it comprises: neodymium iron boron matrix, and alloy layer, and its plating is on the surface of neodymium iron boron matrix, and alloy layer comprises from the inside to the outside: the first coating, and it is Ni-Cu-Ni layer; And second coating, it is Sn layer.

Preferably, in technique scheme, the thickness of the first coating is 8 ~ 15 μm, and the thickness of the second coating is 2 ~ 5 μm.

Compared with prior art, the present invention has following beneficial effect:

1. the alloy layer porosity of neodymium iron boron magnetic body of the present invention is little, and resistance to saltfog, oxidative resistance, corrosion resistance and resistance to wear all increase.

2. neodymium iron boron magnetic body of the present invention also has excellent welding function.

3. the surface of neodymium iron boron magnetic body of the present invention have smoothly, not easily covered with dust and opaque feature, therefore its overall texture strengthens.

Accompanying drawing explanation

Fig. 1 is the structural representation according to neodymium iron boron magnetic body of the present invention.

Main Reference Numerals illustrates:

1-neodymium iron boron magnetic body, 11-neodymium iron boron matrix, 12-alloy layer, 121-first coating, 122-second coating.

Embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of embodiment.

Clearly represent unless otherwise other, otherwise in whole specification and claims, term " comprise " or its conversion as " comprising " or " including " etc. by be understood to include the element of stating or part, and do not get rid of other elements or other parts.

As shown in Figure 1, according to a kind of neodymium iron boron magnetic body 1 of the specific embodiment of the invention, it comprises: neodymium iron boron matrix 11 and alloy layer 12.The surface at neodymium iron boron matrix 11 electroplated by alloy layer 12.Alloy layer comprises from the inside to the outside: the first coating 121 and the second coating 122.Wherein the first coating 121 is Ni-Cu-Ni layer, and the second coating 122 is Sn layer.

Preferably, in above-mentioned execution mode, the thickness of the first coating is 8 ~ 15 μm, and the thickness of the second coating is 2 ~ 5 μm.It is to be understood that those skilled in the art can select the thickness of the first coating and the second coating according to actual needs, and the present invention is not as limit.

The present invention is by alloy-layer on the plated surface of neodymium iron boron matrix, and make the porosity of neodymium iron boron magnetic body little, resistance to saltfog, oxidative resistance, corrosion resistance and resistance to wear all increase.The salt mist test of neodymium-iron-boron external surface of the present invention can reach more than 2000 hours, and has excellent welding function.In addition, alloy layer internal stress of the present invention is little, solution dispersibility and covering power good, current efficiency is high, neodymium iron boron magnetic body of the present invention is had smoothly, not easily covered with dust and opaque feature, therefore, while product decay resistance is largely increased, its texture is also enhanced.

The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.

Claims (3)

1. a neodymium iron boron magnetic body, is characterized in that, described neodymium iron boron magnetic body comprises:
Neodymium iron boron matrix, and
Alloy layer, its plating is on the surface of described neodymium iron boron matrix, and described alloy layer comprises from the inside to the outside:
First coating, it is Ni-Cu-Ni layer; And
Second coating, it is Sn layer.
2. neodymium iron boron magnetic body according to claim 1, is characterized in that, the thickness of described first coating is 8 ~ 15 μm.
3. neodymium iron boron magnetic body according to claim 1, is characterized in that, the thickness of described second coating is 2 ~ 5 μm.
CN201510870246.9A 2015-12-01 2015-12-01 Neodymium-iron-boron magnet CN105405562A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510870246.9A CN105405562A (en) 2015-12-01 2015-12-01 Neodymium-iron-boron magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510870246.9A CN105405562A (en) 2015-12-01 2015-12-01 Neodymium-iron-boron magnet

Publications (1)

Publication Number Publication Date
CN105405562A true CN105405562A (en) 2016-03-16

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Family Applications (1)

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CN201510870246.9A CN105405562A (en) 2015-12-01 2015-12-01 Neodymium-iron-boron magnet

Country Status (1)

Country Link
CN (1) CN105405562A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110004439A (en) * 2019-03-15 2019-07-12 包头稀土研究院 The preparation method of the carbon-free compound protective coating of rare earth metal surface

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001196215A (en) * 2000-01-07 2001-07-19 Tokin Corp Rare earth permanent magnet having good corrosion resistance and method of manufacturing the same
CN102027552A (en) * 2008-05-14 2011-04-20 日立金属株式会社 Rare-earth-based permanent magnet
CN104630852A (en) * 2013-11-12 2015-05-20 天津三环乐喜新材料有限公司 Rare earth permanent magnet with multilayer composite electroplated coating and composite electroplating method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001196215A (en) * 2000-01-07 2001-07-19 Tokin Corp Rare earth permanent magnet having good corrosion resistance and method of manufacturing the same
CN102027552A (en) * 2008-05-14 2011-04-20 日立金属株式会社 Rare-earth-based permanent magnet
CN104630852A (en) * 2013-11-12 2015-05-20 天津三环乐喜新材料有限公司 Rare earth permanent magnet with multilayer composite electroplated coating and composite electroplating method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110004439A (en) * 2019-03-15 2019-07-12 包头稀土研究院 The preparation method of the carbon-free compound protective coating of rare earth metal surface

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Application publication date: 20160316

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