JPS6346714A - Surface treating method of rare earth permanent magnet - Google Patents
Surface treating method of rare earth permanent magnetInfo
- Publication number
- JPS6346714A JPS6346714A JP19104486A JP19104486A JPS6346714A JP S6346714 A JPS6346714 A JP S6346714A JP 19104486 A JP19104486 A JP 19104486A JP 19104486 A JP19104486 A JP 19104486A JP S6346714 A JPS6346714 A JP S6346714A
- Authority
- JP
- Japan
- Prior art keywords
- rare earth
- permanent magnet
- earth permanent
- iron
- steam
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 31
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 229910052796 boron Inorganic materials 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000004381 surface treatment Methods 0.000 claims description 7
- 150000003624 transition metals Chemical group 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 abstract description 4
- 229910052684 Cerium Inorganic materials 0.000 abstract description 2
- 229910052692 Dysprosium Inorganic materials 0.000 abstract description 2
- 229910052777 Praseodymium Inorganic materials 0.000 abstract description 2
- 229910052771 Terbium Inorganic materials 0.000 abstract description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract 2
- 239000010408 film Substances 0.000 abstract 2
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229910052746 lanthanum Inorganic materials 0.000 abstract 1
- 229910001172 neodymium magnet Inorganic materials 0.000 abstract 1
- 239000010409 thin film Substances 0.000 abstract 1
- 229910052727 yttrium Inorganic materials 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 229910000722 Didymium Inorganic materials 0.000 description 1
- 241000224487 Didymium Species 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/026—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets protecting methods against environmental influences, e.g. oxygen, by surface treatment
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、基本ＦＡ５２１′Ｉ；希土類金属、鉄および
ボロンからなる希土類永久磁石の表面処理方法に関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a surface treatment method for basic FA521'I; a rare earth permanent magnet made of rare earth metals, iron and boron.
従来、基本組成が希土類金属、鉄およびボロンからなる
希土類永久磁石は、非常に活性なｔめ酸化や錆といった
腐食の問題があり、メツキやエポキシ樹脂コーティング
、アルミコート等を施してい九〇
〔発明が解決しようとする問題点〕
しかしながら、このような表面処ぶ方法は１分厚い保護
膜となったり、穆護膜り′−弱かったり、吸水性ｂ″−
ありたり、方法が簡便でなく、コストアップとなる等と
いつ几問題点を有している。Conventionally, rare earth permanent magnets whose basic composition is rare earth metals, iron, and boron have been subject to corrosion problems such as oxidation and rust due to their extremely active properties, so they have been coated with plating, epoxy resin coating, aluminum coating, etc. However, such surface treatment methods result in a thick protective film, a weak protective film, and a poor water absorbency.
However, there are some problems, such as the method is not simple and increases the cost.
本発′明は以上の問題点な解決するもので、その目的と
するところは、希土類永久磁石に強固でかつ薄く、耐侯
性のある保護皮膜を簡便な方法で施すものである。The present invention is intended to solve the above problems, and its purpose is to apply a strong, thin, and weather-resistant protective coating to rare earth permanent magnets by a simple method.
本発明の希土類永久磁石の表面処理方法は、基本組成が
希土類金唄、鉄およびボロンからなる希土類永久磁石に
水蒸気処理を施すことを特徴とする特
この水蒸気処理とけ、希土類永久磁石を４００〜８００
℃に加熱し、これに空気および加熱蒸気を通じ、次いで
還元ガスで還元してＦｅ３”４ を形咬する方法であ
り、得られる皮膜の色は真黒で、膜厚も数μ以下と薄く
、耐候性、耐熱性をも有する。The surface treatment method for a rare earth permanent magnet of the present invention is characterized by subjecting a rare earth permanent magnet whose basic composition is rare earth metal, iron, and boron to a steam treatment.
℃, pass air and heated steam through it, and then reduce it with a reducing gas to mold Fe3"4. The resulting film is jet black, has a thickness of a few microns or less, and is weather resistant. It also has heat resistance and heat resistance.
なお、基本組成が希土類金属、鉄およびポロンからなる
希土類永久磁石としてはＭ −Ｆｅ −Ｂ ＥＢ石が知
られているが、希土類金属としてけ、Ｙ。Incidentally, as a rare earth permanent magnet whose basic composition is a rare earth metal, iron, and poron, M-Fe-B EB stone is known, but Y as a rare earth metal.
ＬＩＺ 、 Ｃｓ 、 Ｐｒ 、 Ｎｄ 、 Ｐｒｎ
、 Ｂｍ 、 Ｋｕ 、 Ｇｄ 、 Ｔｂ、 Ｄｙ 、
Ｈｏ 。LIZ, Cs, Pr, Nd, Prn
, Bm, Ku, Gd, Tb, Dy,
Ho.
Ｅｒ、Ｔｍ、ＹｂおよびＬ１２ の希土類元素のうち
の１種−！九は２種以上であれば良く、ジジム（Ｐｒ
−Ｎｄ）やセリウム・ジジム（Ｏｅ −Ｐｒ−Ｎｄ ）
でも十分な磁気性能が得られ、（＃絵画・価格面から有
利である。さらに、ｐｙ＋Ｔｂ等の重希土類元素の少量
添加により、保磁力ｉｚｃを増大させることｈ；でき、
温度特性の実質的な改善が達成される。One of the rare earth elements Er, Tm, Yb and L12-! Nine should be two or more types, and Jijim (Pr
-Nd) and cerium didymium (Oe -Pr-Nd)
However, sufficient magnetic performance can be obtained, and it is advantageous in terms of painting and price.Furthermore, by adding a small amount of heavy rare earth elements such as py+Tb, the coercive force izc can be increased;
A substantial improvement in temperature properties is achieved.
また、鉄の一部をコバルトで置換することにより千エー
リ一温度の向上が計られ、他の遷移金属群で置換しても
磁気性能や耐食性等が改善される。Furthermore, by substituting a part of iron with cobalt, the temperature can be improved, and even if the iron is replaced with other transition metals, magnetic performance, corrosion resistance, etc. can be improved.
以下、本発明について実施例に基づいて詳細に説明する
。Hereinafter, the present invention will be described in detail based on examples.
実施例−１
第１表の組成になるように高周波溶解炉を用いアルゴン
ガス雰囲気下で溶解、鋳造し、スタンプミル、ボールミ
ルを用いて粉砕して、平均粒度で３〜５μ（フィッシャ
ーナンバー）の磁性粉末とし、１５ ｋｏｅの磁場中で
配向させｊ ５ Ｋｇ／＋ｕ＋ ２の咬形圧で圧縮成形
させ、 １０００−’１２００°Ｃの最適焼結温度で
焼結を施した。Example-1 The composition shown in Table 1 was melted and cast in an argon gas atmosphere using a high-frequency melting furnace, and ground using a stamp mill and a ball mill to obtain a powder with an average particle size of 3 to 5μ (Fisher number). A magnetic powder was prepared, oriented in a magnetic field of 15 koe, compression molded with a bite pressure of j 5 Kg/+u+ 2, and sintered at an optimum sintering temperature of 1000-1200°C.
第１表
第２表に本発明（あ）と比較例（い、う、え）の表面処
理方法を示す。Tables 1 and 2 show the surface treatment methods of the present invention (A) and comparative examples (I, U, E).
第２表 第３表に評価項目をしめす。Table 2 Table 3 shows the evaluation items.
第５表 第４表に耐候性試験の結果を示す。Table 5 Table 4 shows the results of the weather resistance test.
第４表
第４表から明らかな工うに、従来の表面処理方法と比べ
ると、本発明は希土類永久磁石て強固でかつ薄く、耐候
性のある穆護皮膜を、明らかに簡便で安価な方法で施す
ことができることが分かる。Table 4 As is clear from Table 4, compared to conventional surface treatment methods, the present invention can produce a strong, thin, and weather-resistant protective coating on rare earth permanent magnets in an obviously simpler and cheaper manner. It turns out that it can be applied.
以上述べ穴ように、本発明によれば、基本組成が希土類
金Ｎ、鉄およびボロンからなる希土類永久磁石に水蒸気
処理を施すことにより、従来にない程強固でかつ薄く、
耐候性のある保護皮膜を簡便で安価な方法で施すことが
できるので、希土類金属−鉄一ボロン系磁石の大きな欠
点である耐候性の問題をコストアップすることなく解決
することができ、その次めに狭められてＩＡ友用途ヲ先
に戻すだけでなく、さらに拡大させることも可能となり
、祈念なそして非常圧魅力的な自！！ｌｌｌ車などへの
応用が実現するなど、多大の効果を有するものである。As mentioned above, according to the present invention, by subjecting a rare earth permanent magnet whose basic composition is rare earth gold N, iron, and boron to steam treatment, it becomes stronger and thinner than ever before.
Since a weather-resistant protective film can be applied by a simple and inexpensive method, the problem of weather resistance, which is a major drawback of rare earth metal-iron-boron magnets, can be solved without increasing costs. Not only can it be narrowed down to return to its original IA friend use, but it can also be expanded further, creating a prayerful and extremely attractive self! ! It has many effects, such as being able to be applied to automobiles.
以 上that's all
Claims (2)
希土類永久磁石に水蒸気処理を施すことを特徴とする希
土類永久磁石の表面処理方法。(1) A method for surface treatment of a rare earth permanent magnet, which comprises subjecting a rare earth permanent magnet whose basic composition is a rare earth metal, iron, and boron to steam treatment.
属群から選ばれた少なくとも１種以上の遷移金属群で置
換した特許請求の範囲第１項記載の希土類永久磁石の表
面処理方法。(2) A method for surface treatment of a rare earth permanent magnet according to claim 1, wherein a part of the iron is replaced with at least one transition metal group selected from a transition metal group other than iron, such as cobalt. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19104486A JPS6346714A (en) | 1986-08-14 | 1986-08-14 | Surface treating method of rare earth permanent magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19104486A JPS6346714A (en) | 1986-08-14 | 1986-08-14 | Surface treating method of rare earth permanent magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6346714A true JPS6346714A (en) | 1988-02-27 |
Family
ID=16267954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19104486A Pending JPS6346714A (en) | 1986-08-14 | 1986-08-14 | Surface treating method of rare earth permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6346714A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0396880A1 (en) * | 1989-05-12 | 1990-11-14 | Krupp Widia GmbH | NdFeB magnet and surface passivation process of NdFeB magnets |
-
1986
- 1986-08-14 JP JP19104486A patent/JPS6346714A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0396880A1 (en) * | 1989-05-12 | 1990-11-14 | Krupp Widia GmbH | NdFeB magnet and surface passivation process of NdFeB magnets |
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