JPS62290107A - Magnet - Google Patents
MagnetInfo
- Publication number
- JPS62290107A JPS62290107A JP13349886A JP13349886A JPS62290107A JP S62290107 A JPS62290107 A JP S62290107A JP 13349886 A JP13349886 A JP 13349886A JP 13349886 A JP13349886 A JP 13349886A JP S62290107 A JPS62290107 A JP S62290107A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- plating
- crystal grains
- magnet
- surface layer
- 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
- 238000007747 plating Methods 0.000 claims abstract description 16
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 15
- 239000000956 alloy Substances 0.000 claims abstract description 15
- 239000002344 surface layer Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 238000005245 sintering Methods 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 239000013078 crystal Substances 0.000 abstract description 11
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 239000000843 powder Substances 0.000 abstract description 7
- 230000032683 aging Effects 0.000 abstract description 4
- 239000002023 wood Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- 229910001261 rose's metal Inorganic materials 0.000 abstract description 2
- 229910000743 fusible alloy Inorganic materials 0.000 abstract 3
- 239000011800 void material Substances 0.000 abstract 3
- 239000000155 melt Substances 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 238000002203 pretreatment Methods 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)
Abstract
Description
【発明の詳細な説明】 ３、発明の詳細な説明 （産業上の利用分野） この発明は、磁石に関する。[Detailed description of the invention] 3. Detailed description of the invention (Industrial application field) TECHNICAL FIELD This invention relates to magnets.
（従来の技術）
従来、Ｓｍ−Ｃｏ系磁石、Ｎｄ−Ｆｅ−Ｂ系に代表され
る高エネルギー積磁石は、微粉末原料をプレス成形した
後、熱処理により焼結、時効したものが公知である。(Prior art) Conventionally, high-energy stacked magnets such as Sm-Co-based magnets and Nd-Fe-B-based magnets are known to be obtained by press-forming fine powder raw materials, followed by sintering and aging through heat treatment. .
（発明が解決しようとする問題点）
しかし従来の磁石は、粉末焼結法で作製するため、結晶
粒間に空隙を生じるため、脆くて外周コーナ一部が欠け
たり、非常に錆やすいという欠点があった。また耐食性
改善の例と１ノで電気めっき法やＰＶＤ法が開示されて
いるが、密着性を得るためには、酸、アルカリ笠による
前処理が必要となるが、処理中に磁石の結晶粒間空隙に
処理液が侵入してしまうため、結晶粒間が侵され磁石特
性の低下、閤械的強度の低下、さらにはめつき被膜下の
磁石が詰るという欠点があった。(Problems to be solved by the invention) However, since conventional magnets are manufactured using a powder sintering method, voids are created between the crystal grains, making them brittle, chipping a part of the outer circumferential corner, and being extremely susceptible to rust. was there. In addition, electroplating and PVD methods are disclosed in No. 1 and Example of Corrosion Resistance Improvement, but in order to obtain adhesion, pretreatment with acid or alkali is required, but during the treatment, the crystal grains of the magnet Since the processing liquid invades the interstices, the spaces between the crystal grains are attacked, resulting in a decrease in magnetic properties, a decrease in mechanical strength, and furthermore, the magnet under the plating film becomes clogged.
そこでこの発明は従来のこのような欠点を解決するため
、表層部の結晶粒間空隙部を封孔し、更に金属めっきを
施すことにより、耐食性の向−ヒと外周コーナ一部のカ
ケを防ぐことを目的としている。Therefore, in order to solve these conventional drawbacks, this invention seals the intergrain voids in the surface layer and further applies metal plating to improve corrosion resistance and prevent chipping at some of the outer corners. The purpose is to
（問題点を解決するための手段）
上記問題点を解決するためにこの発明は、粉末焼結法に
て作製された磁わの表層部の結晶粒間の空隙を、アナト
ミカル合金、ウッド合金、ニュートン合金、ローズ合金
箸に代表されるいわゆる低融点合金で封孔したあと、め
っき法にて所望の金属を被覆した。(Means for Solving the Problems) In order to solve the above problems, the present invention aims to eliminate the voids between the crystal grains in the surface layer of the magnetic material produced by the powder sintering method using anatomical alloy, wood alloy, etc. After sealing with a so-called low melting point alloy such as Newton's alloy and rose alloy chopsticks, a desired metal was coated by plating.
（作用）
上記のように粉末焼結磁石の結晶粒間の空隙を低融点合
金で封孔することにより、めっき前処理における処理液
の侵入を防止することによりめっき処理を容易にならし
めると同時に表層部の結晶粒間の結合性を高めカケを防
止することがでる。(Function) As described above, by sealing the voids between the crystal grains of the powder sintered magnet with a low melting point alloy, the plating process is facilitated by preventing the intrusion of the processing liquid during the plating pre-treatment. It can improve the bond between crystal grains in the surface layer and prevent chipping.
まためっき処理を容易にすることにより、耐食性の向上
、機械的強度の低下防止、磁気特性の低下防止を防ぐこ
とができるのである。Furthermore, by making the plating process easier, corrosion resistance can be improved, mechanical strength can be prevented from decreasing, and magnetic properties can be prevented from decreasing.
（実施例） 以下にこの発明の実施例を図面にもとづいて説明する。(Example) Embodiments of the present invention will be described below based on the drawings.
図において、１は焼結磁石であり、Ｎｂ−Ｆｅ−３を主
成分とする微粉末原料を、ボールミルにて混合したあと
、磁場プレスを用いて所望の形状に成形した。このあと
熱処理装置を用い、焼結。In the figure, 1 is a sintered magnet, which was formed into a desired shape using a magnetic field press after mixing fine powder raw materials containing Nb-Fe-3 as a main component in a ball mill. After that, it is sintered using heat treatment equipment.
時効処理を行った。次に（３１−Ｐｂ −Ｓｎ −Ｃｄ
系低融点合金であるウッド合金の溶融中に５分間浸漬し
、１の焼結磁石の表層部に、２の低融点合金層を形成し
結晶粒間空隙部の封孔と表層被覆を行った。Aging treatment was performed. Then (31-Pb-Sn-Cd
The magnet was immersed for 5 minutes in the melting of Wood alloy, which is a low melting point alloy, to form a low melting point alloy layer (2) on the surface layer of the sintered magnet (1) to seal the intergrain voids and cover the surface layer. .
次にめっき前処理を施したあと阻めっきを行い、３の金
属めっき層を完成させた。Next, after performing plating pretreatment, barrier plating was performed to complete the metal plating layer 3.
次に上記実施例で得られた磁石と従来の方法で湿式めっ
きを施した磁石との比較試験を行った。Next, a comparison test was conducted between the magnet obtained in the above example and a magnet wet-plated using a conventional method.
恒温高湿（４０℃、９５％、１００Ｈ）試験後の各特性
を表−１に示す。Table 1 shows each characteristic after the constant temperature and high humidity (40°C, 95%, 100H) test.
耐食性は°本発明品が何ら変化しなかったのに対し、従
来品は局部的に赤錆が生じた。The corrosion resistance of the product of the present invention did not change at all, whereas the conventional product developed red rust locally.
磁気特性はＢｄ値で比較したが、本発明量１１時効後着
磁した値と同値が得られたのに対し従来品は１２％ダウ
ンした。機械的強度は曲げ試験にて比較したが、本発明
品が初期の強度と同値が得られたのに対し、従来品は１
４％ダウンした。このように本発明品は高エネルギー積
磁石として必要な各特性を充分満足したのに対し、従来
品はいづれの特性も低下してしまった。The magnetic properties were compared in terms of Bd value, and the same value as the value obtained by magnetizing after aging of the present invention amount of 11 was obtained, whereas the value of the conventional product was 12% lower. The mechanical strength was compared in a bending test, and the product of the present invention had the same value as the initial strength, whereas the conventional product had a strength of 1.
It was down 4%. As described above, the product of the present invention satisfactorily satisfies each characteristic necessary for a high-energy product magnet, whereas the conventional product has deteriorated in all characteristics.
更に恒温高湿試験を１０００Ｈまで継続して行った結果
でも、本発明品は発錆しなかったのに対し、従来品は結
晶粒間の腐食が進行し、風化状態となり磁石としての性
能をまったく消失してしまった。Furthermore, even after constant temperature and high humidity tests continued for up to 1000 hours, the product of the present invention did not develop rust, whereas the conventional product developed corrosion between crystal grains, became weathered, and completely lost its performance as a magnet. It has disappeared.
（発明の効果）
この発明は以上説明したように、結晶粒間の空隙を低融
点合金で封孔したあとめっきするという 。(Effects of the Invention) As explained above, in this invention, the voids between crystal grains are sealed with a low melting point alloy and then plated.
簡単な構成で焼結法で作製された磁石の耐食性を高める
ことにより、電子部品をはじめとする軽薄短小化の切望
を満たす高エネルギー積磁石を供給する効果がある。By increasing the corrosion resistance of a magnet manufactured by a sintering method with a simple structure, it is possible to provide a high-energy product magnet that satisfies the desire for lighter, thinner, and smaller electronic components.
図面はこの発明にかかわる磁石の１例の断面図。 １・・・焼結磁石 ２・・・低融点合金層 ３・・・金属めっき層 The drawing is a cross-sectional view of an example of a magnet according to the present invention. 1...Sintered magnet 2...Low melting point alloy layer 3...Metal plating layer
Claims (1)
、その上に更に金属めつき層を設けたことを特徴とする
磁石。A magnet produced by a sintering method, the surface layer of which is coated with a low melting point alloy, and a metal plating layer further provided on the surface layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13349886A JPS62290107A (en) | 1986-06-09 | 1986-06-09 | Magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13349886A JPS62290107A (en) | 1986-06-09 | 1986-06-09 | Magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62290107A true JPS62290107A (en) | 1987-12-17 |
Family
ID=15106175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13349886A Pending JPS62290107A (en) | 1986-06-09 | 1986-06-09 | Magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62290107A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999023675A1 (en) * | 1997-10-30 | 1999-05-14 | Sumitomo Special Metals Co., Ltd. | HIGH CORROSION-RESISTANT R-Fe-B-BASE BONDED MAGNET AND METHOD OF MANUFACTURING THE SAME |
-
1986
- 1986-06-09 JP JP13349886A patent/JPS62290107A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999023675A1 (en) * | 1997-10-30 | 1999-05-14 | Sumitomo Special Metals Co., Ltd. | HIGH CORROSION-RESISTANT R-Fe-B-BASE BONDED MAGNET AND METHOD OF MANUFACTURING THE SAME |
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