JPS63234503A - Manufacture of permanent magnet - Google Patents
Manufacture of permanent magnetInfo
- Publication number
- JPS63234503A JPS63234503A JP62069665A JP6966587A JPS63234503A JP S63234503 A JPS63234503 A JP S63234503A JP 62069665 A JP62069665 A JP 62069665A JP 6966587 A JP6966587 A JP 6966587A JP S63234503 A JPS63234503 A JP S63234503A
- Authority
- JP
- Japan
- Prior art keywords
- atomic
- magnet
- permanent magnet
- magnetizing
- magnetization
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000005415 magnetization Effects 0.000 claims abstract description 13
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 8
- 229910052796 boron Inorganic materials 0.000 claims abstract description 6
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 3
- 229910052777 Praseodymium Inorganic materials 0.000 claims abstract description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 36
- 230000004907 flux Effects 0.000 abstract description 12
- 239000000203 mixture Substances 0.000 abstract description 6
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 abstract description 2
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 abstract description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 229910052772 Samarium Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910000722 Didymium Inorganic materials 0.000 description 1
- 241000224487 Didymium Species 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- 229910052773 Promethium Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical compound [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- VQMWBBYLQSCNPO-UHFFFAOYSA-N promethium atom Chemical compound [Pm] VQMWBBYLQSCNPO-UHFFFAOYSA-N 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、Ｒ−Ｂ−Ｆｅ系永久磁石に係り、とくに磁石
の着磁方法を改善する製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an R-B-Fe permanent magnet, and particularly to a manufacturing method for improving the method of magnetizing the magnet.
近年、Ｎｄ−Ｂ−Ｆｅ系永久磁石（特開昭５９−４６０
０８号公報参照）が発明され、一部は実用化され、その
使用量は増加しつつある。In recent years, Nd-B-Fe permanent magnets (JP-A-59-460
(see Publication No. 08) have been invented, some of which have been put into practical use, and their usage is increasing.
Ｎｄ−Ｂ−Ｆｅ系永久磁石は、核生成タイプで高保磁力
を発生すると言われており、機構的には、従来のＳｍ１
Ｃｏ、型と同類である。しかしながら、従来のＳｍ、Ｃ
ｏ、型磁石においては、着磁磁界強度が、１５〜２０Ｋ
Ｏｅで十分てあるのに対し、Ｎ ｄ −Ｂ −Ｆ ｅ系
永久磁石においては、２０〜２５ＫＯｅの磁界が必要で
あり着磁において、多大な電気エネルギーを必要とする
。Nd-B-Fe permanent magnets are said to be nucleation type and generate high coercive force, and are mechanically comparable to conventional Sm1
Similar to Co, type. However, the conventional Sm, C
o. For type magnets, the magnetizing magnetic field strength is 15 to 20K.
While Oe is sufficient, Nd-B-Fe based permanent magnets require a magnetic field of 20 to 25 KOe, which requires a large amount of electrical energy for magnetization.
〔発明が解決しようとする問題点３
以上の如く、Ｎｄ−Ｂ−Ｆｅ系磁石は、高保磁力（ｊＨ
ｃ、 ）を有する一方、着磁に大きな着磁磁界強度を必
要とするため、従って、従来の永久磁石に使われてきた
着磁機ではその着磁磁界強度が低いことおよび特に異方
性磁石の多極着磁の場合には、その磁石の極間が狭いた
め発生着磁磁界強度を十分に大きくできないなどの理由
により、着磁量が十分でないなどの問題があった。[Problem 3 to be solved by the invention As described above, Nd-B-Fe magnets have a high coercive force (jH
c,) However, since magnetization requires a large magnetizing magnetic field strength, the magnetizing machine used for conventional permanent magnets has a low magnetizing magnetic field strength, and is particularly suitable for anisotropic magnets. In the case of multi-pole magnetization, there was a problem that the amount of magnetization was insufficient because the strength of the generated magnetizing magnetic field could not be sufficiently increased due to the narrow distance between the poles of the magnet.
この解決を図るには、磁石の有する固有保磁力ｉ Ｈｃ
値以上の、着磁磁界強度が、必要である。In order to solve this problem, the intrinsic coercive force i Hc of the magnet is
A magnetizing magnetic field strength greater than or equal to the value is required.
そこで、本発明の目的は、Ｒ−Ｂ−Ｆｅ系永久磁石の着
磁方法において、十分に着磁量が得られる新規な永久磁
石の製造方法を提供することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a novel method for manufacturing a permanent magnet that can obtain a sufficient amount of magnetization in a method for magnetizing an R-B-Fe-based permanent magnet.
上記問題点を解決を図るため、発明者は磁石の保磁力（
ｉ Ｈｃ ）が、磁石の加熱に伴い低下することを応用
し、本発明を見出すに至ったのである。すなわち、Ｒ−
Ｂ −Ｆ ｅ系磁石をＴ１＝３０℃から Ｔ２＝ （Ｔ
ｃ−４０） ℃の温度領域（Ｔｃはキュリー温度）にて
着磁することを特徴とするものである。例えば、Ｒ−Ｂ
−Ｆｅ系異方性焼結磁石のｉ Ｈｃの温度係数は、概略
−〇、６％／℃（２０〜１４０℃） にあり、キュリー
温度（Ｔ ｃ）にて、磁気が消失する。−例として、常
温磁気属性として、Ｂｒ＝１２ＫＧ、１Ｈｃ＝１７．８
ＫＯｅ の特性を有すＲ−Ｂ−Ｆｅ系異方性焼結磁石
の測定温度（Ｔ）と、ｉ Ｈｃの関係を表わすと表−１
となる。In order to solve the above problems, the inventor developed the coercive force (
The present invention was discovered by applying the fact that i Hc ) decreases as the magnet is heated. That is, R-
B -Fe magnet from T1 = 30℃ to T2 = (T
c-40) It is characterized by being magnetized in the temperature range of °C (Tc is the Curie temperature). For example, R-B
The temperature coefficient of i Hc of the -Fe-based anisotropic sintered magnet is approximately -0.6%/°C (20 to 140°C), and magnetism disappears at the Curie temperature (Tc). - As an example, as normal temperature magnetic attributes, Br=12KG, 1Hc=17.8
Table 1 shows the relationship between the measured temperature (T) of an R-B-Fe-based anisotropic sintered magnet with characteristics of KOe and iHc.
becomes.
以下余白
第１表
第１表から２０℃を越えＴｃ未滴の温度領域で、測定し
たｉ Ｈｃは２０℃でのｉ Ｈｃに比較し、小さいこと
が分かる。すなわち、Ｒ−Ｂ−Ｆｅ系磁石を例えば２０
０℃に加熱すれば、約２〜４ＫＯｅの着磁磁界強度で十
分であることが分かる。From Table 1 below, it can be seen that the measured i Hc is smaller than the i Hc at 20° C. in the temperature range exceeding 20° C. and no Tc drops. That is, for example, 20
It can be seen that when heated to 0° C., a magnetizing magnetic field strength of about 2 to 4 KOe is sufficient.
本発明は、Ｒ−Ｂ−Ｆｅ系永久磁石の着磁方法において
、Ｔ□＝３０℃からＴ２＝ （Ｔｃ−４０）℃の温度領
域にて着磁することを特徴とするものである。The present invention is a method for magnetizing an R-B-Fe permanent magnet, and is characterized by magnetizing in a temperature range from T□=30°C to T2=(Tc-40)°C.
Ｔ□未満およびＴ２を越える温度では本発明の効果が少
ない。At temperatures below T□ and above T2, the effect of the present invention is small.
なお、本発明の製造方法は、焼結法による等方性および
異方性磁石、さらに、プラスチックとＲ−Ｂ−Ｆｅ系系
合金粉の複合磁石いわゆるプラスチック磁石などの組成
的にＦｅを必須とするＲ−Ｂ−Ｆｅ系の永久磁石に適用
可能である。また、加熱に際し非酸化性雰囲気ガスを使
用することは磁石の酸化による磁気特性の低下を防止す
る意味で有効である。The manufacturing method of the present invention is applicable to isotropic and anisotropic magnets produced by sintering, as well as composite magnets made of plastic and R-B-Fe alloy powder, so-called plastic magnets, in which Fe is essential in the composition. It is applicable to R-B-Fe-based permanent magnets. Furthermore, using a non-oxidizing atmospheric gas during heating is effective in preventing deterioration of magnetic properties due to oxidation of the magnet.
次に本発明を適用する希土類・ポロン・鉄系磁石の成分
限定理由について説明すると１本発明の磁石は希土類元
素Ｒ（但しＲはＹを含む希土類元素の少なくとも１種）
、ポロンおよび鉄を必須元素とする。さらに詳述すると
、Ｒとしてはネオジム（Ｎｄ）、プラセオジム（Ｐ ｒ
）またはそれらの混合物（ジジム）が好ましく、他にラ
ンタン（Ｌａ）、セリウム（Ｃｅ）、テルビウム（Ｔｂ
）、ジスプロシウム（Ｄｙ）。Next, the reasons for limiting the components of the rare earth/poron/iron magnet to which the present invention is applied will be explained: 1. The magnet of the present invention contains the rare earth element R (however, R is at least one rare earth element including Y).
, poron and iron as essential elements. To explain in more detail, R is neodymium (Nd), praseodymium (P r
) or a mixture thereof (didymium) is preferred; other examples include lanthanum (La), cerium (Ce), and terbium (Tb).
), dysprosium (Dy).
ホルミウム（Ｈｏ）、エルビウム（Ｅｒ）、ユウロピウ
ム（Ｅｕ）、サマリウム（Ｓｍ）、ガ１−リニウム（Ｇ
ｄ）、プロメチウム（Ｐｍ）。Holmium (Ho), erbium (Er), europium (Eu), samarium (Sm), gallium (G)
d), promethium (Pm).
ツリウム（Ｔｍ）、イッテルビウム（ｙｂ）。Thulium (Tm), Ytterbium (yb).
ルテチウム（Ｌｕ）及びイツトリウム（Ｙ）などの希土
類元素を含んで良く、総量で８〜３０原子％とされる。It may contain rare earth elements such as lutetium (Lu) and yttrium (Y), and the total amount is 8 to 30 at%.
８原子％未満では十分な保磁力が得られず、３０原子％
を越えると、残留磁束密度が低下するためである。ポロ
ンＢは２〜２８Ｍ子％とされる。２原子％未満では十分
な保磁力が得られず、２８原子％を越えると残留磁束密
度が低下し優れた磁気特性が得られないためである。上
記ＲおよびＢ以外の元素としてＦｅは必須であり４．０
−９０ Ｈ子％含有される。If it is less than 8 at%, sufficient coercive force cannot be obtained, and if it is less than 30 at%
This is because the residual magnetic flux density decreases when the value exceeds . Poron B has a concentration of 2 to 28 M%. This is because if it is less than 2 atomic %, a sufficient coercive force cannot be obtained, and if it exceeds 28 atomic %, the residual magnetic flux density decreases and excellent magnetic properties cannot be obtained. Fe is essential as an element other than R and B mentioned above, and 4.0
Contains -90 H%.
４０原子％未満では残留磁束密度（Ｂｒ）が低下し、９
０原子％を越えると高い保磁力（ｉＨｃ）が得られない
ためである。If it is less than 40 at%, the residual magnetic flux density (Br) decreases, and 9
This is because if it exceeds 0 atomic %, a high coercive force (iHc) cannot be obtained.
上記Ｒ−ＢおよびＦｅを必須元素とし、希土類・ポロン
・鉄系磁石は作成されるが下記の如く、鉄の一部を他の
元素で置換することや、不純物を含んでも本発明の効果
は失われない。Rare earth/poron/iron magnets can be created using the above R-B and Fe as essential elements, but as described below, the effects of the present invention will not be achieved even if some of the iron is replaced with other elements or if impurities are included. not lost.
すなわち、Ｆｅの代りに、５０原子％以下のＣｏ、８ｇ
子％以下のＮｉで代替しても良い。That is, in place of Fe, 50 atomic % or less of Co, 8 g
It may be replaced with Ni of less than %.
Ｃ，ｏは５０原子％を越えると高いｊＨｃが得られず、
Ｎｉは８％を越えると高いＢｒが得られないためである
。また上記以外の元素として下記所定原子％以外のへ元
素の１種以上（ただし、２種以上含む場合のへ元素の重
量は当該含有へ元素の内最大値を有するものの値以下）
をＦｅ元素と置換しても本発明の効果は失われない。If C, o exceeds 50 atomic %, high jHc cannot be obtained,
This is because if Ni exceeds 8%, high Br cannot be obtained. In addition, as elements other than the above, one or more of the elements other than the specified atomic percent below (however, if two or more types are included, the weight of the element is less than the value of the element with the maximum value among the contained elements)
The effect of the present invention is not lost even if the element is replaced with Fe element.
Ａ元素を下記する。Element A is shown below.
Ｃ実施例〕 以下、本発明を実施例によって説明する。C Example] Hereinafter, the present invention will be explained by examples.
実施例１
特開昭５９−２ ］、 ７３０５号公報に記載の公知の
方法にてＮｄ−Ｂ−Ｆｅ系異方性焼結磁石を作製した。Example 1 An anisotropic sintered Nd-B-Fe magnet was produced by a known method described in Japanese Patent Application Laid-Open No. 59-2] and No. 7305.
すなわち組成（重量％）３３Ｎｄ−ＩＢ−残Ｆｅを有し
、形状１０Ｘ１０Ｘ１２（単位器）の磁石である。溶解
後インゴットを粉砕し、平均粒径３．３μｍの微粉を公
知の配向技術にて一軸異方性化した成形体を１０９０℃
Ｘ２Ｈｒで焼結後、炉中で徐冷しさらに、６００℃Ｘ
Ｉ Ｈｒの時効処理を行う方法にて作成した。得られた
焼結体はＢ ｒ＝１２．２ＫＧ。That is, the magnet has a composition (weight %) of 33Nd-IB-remaining Fe and has a shape of 10x10x12 (unit size). After melting, the ingot was crushed, and the fine powder with an average particle size of 3.3 μm was made uniaxially anisotropic using a known orientation technique.
After sintering at X2Hr, it is slowly cooled in a furnace and further heated to 600℃X
It was created using a method that performs IHr aging treatment. The obtained sintered body had a weight of Br=12.2KG.
Ｉ Ｈｃ ＝ １５ 、２ Ｋ Ｏｅ の磁気特性（
２０℃。Magnetic properties of I Hc = 15, 2 K Oe (
20℃.
２０ＫＯｅ着磁）を有するものであり、これを、第２表
に示す着磁温度（大気中）にて、着磁磁界強度７ＫＯｅ
で着磁後、冷却し、２０℃にて測定したフラックス値の
変化を第２表に示す。It has a magnetization field strength of 7KOe at the magnetization temperature (in the atmosphere) shown in Table 2.
Table 2 shows changes in flux values measured at 20° C. after magnetization.
以下余白
第２表
第２表から２０℃より、高温度にて着磁することにより
２０℃で得られる値に比較し、高磁束量が得られること
が分かる。From Table 2 in Table 2 below, it can be seen that a higher amount of magnetic flux can be obtained by magnetizing at a higher temperature than the value obtained at 20°C.
実施例２
特開昭５９−２１７３０５号公報および特開昭６０−１
５３１．０９号公報に記載の公知の方法にて、Ｎｄ−Ｂ
−Ｆｅ系ラジアル異方性永久磁石を作製した。すなわち
、組成（重量％）３３．５Ｎｄ−１，１Ｂ−残Ｆｅを有
し、形状４２０ｘ４１３ｘ１８Ｑ（単位ｎｔ１１）のリ
ング状磁石である。溶解材を粉砕し平均粒径３．５μｍ
の微粉を公知の配向技術にてラジアル配向したリンク状
の成形体を、１０８０℃Ｘ ２ Ｈｒで焼結後、炉中で
徐冷し、さらに、６００℃ＸＩＨｒの時効処理を行うい
わゆる粉末冶金法による製造方法である。Example 2 JP-A-59-217305 and JP-A-60-1
Nd-B by the known method described in No. 531.09.
-Fe-based radially anisotropic permanent magnets were produced. That is, it is a ring-shaped magnet having a composition (weight %) of 33.5Nd-1,1B-remaining Fe and a shape of 420x413x18Q (unit: nt11). The melted material is crushed to an average particle size of 3.5 μm.
The so-called powder metallurgy method involves sintering a link-shaped compact made by radially orienting fine powder of This is the manufacturing method.
得られた焼結体を各温度にて２４極に着磁し。The obtained sintered body was magnetized into 24 poles at each temperature.
冷却後、２０℃にて表面磁束密度を測定した結果を第３
表に示す。After cooling, the surface magnetic flux density was measured at 20°C.
Shown in the table.
通常、本合金の着磁に必要な着磁磁界強度は２０〜２５
ＫＯｅを要するが、前記リング磁石の着磁には７ＫＯｅ
で、着磁を行った。なお、第３表には、大気中およびＡ
ｒガス気流中で加熱した結果を併記した。Normally, the magnetizing magnetic field strength required for magnetizing this alloy is 20 to 25
KOe is required, but 7KOe is required for magnetizing the ring magnet.
So I did magnetization. In addition, Table 3 shows atmospheric and A
The results of heating in an r gas stream are also shown.
以下余白
第３表
第３表から分かるように、通常着磁に必要な２０〜２５
ＫＯｅより、少ない７ＫＯｅの着磁磁界強度においても
永久磁石を２０℃より高い温度に加熱し、着磁すること
により、２０℃着磁で得られる表面磁束密度に比較し、
高い表面磁束密度が得られることが、分かる。また、非
酸化性雰囲気ガスを使用することも効果的であると分か
る。As you can see from Table 3 in the margin below, the 20 to 25 required for magnetization is normally
Compared to the surface magnetic flux density obtained by magnetizing at 20°C, by heating the permanent magnet to a temperature higher than 20°C and magnetizing it, even with a magnetizing magnetic field strength of 7KOe, which is less than KOe,
It can be seen that a high surface magnetic flux density can be obtained. It has also been found that it is effective to use a non-oxidizing atmospheric gas.
実施例３
公知の方法にて、実施例２と同様に、４２０×４１３×
１８Ｑ （単位ｍｎ＋）の外周２４極異方性磁石を作成
した。形状的には（１）式を満たすサイズである。Example 3 In the same manner as in Example 2, 420×413×
An anisotropic magnet with a diameter of 18Q (unit: mn+) and a 24-pole outer circumference was prepared. In terms of shape, the size satisfies equation (1).
式中、Ｔはリング磁石の厚み、πは円周率（３，１４）
、Ｄは外径、Ｐは極数であり、寸法の単位はｍである６
には０．８〜２．６の範囲で、回転する界磁磁石として
、有効である。In the formula, T is the thickness of the ring magnet, and π is pi (3, 14).
, D is the outer diameter, P is the number of poles, and the unit of dimension is m6
It is effective as a rotating field magnet in the range of 0.8 to 2.6.
（１）式は内周面を多極異方性化したリング磁石にも適
用でき、その場合には（１）式のＤは内径であり、Ｋは
０．８〜４．０の範囲で、有効である。Equation (1) can also be applied to a ring magnet whose inner peripheral surface is made multipolar anisotropic; in that case, D in equation (1) is the inner diameter, and K is in the range of 0.8 to 4.0. ,It is valid.
得られた焼結体を外周面に２４極の多極着磁（７ＫＯｅ
）を第４表に示す温度（大気中）にて行い、冷却後２０
℃にて測定した表面磁束密度の結果を、第４表に示す。The obtained sintered body was multipolarized with 24 poles (7KOe
) at the temperature shown in Table 4 (in the atmosphere), and after cooling
Table 4 shows the results of surface magnetic flux density measured at °C.
以下余白
第４表
実施例１および２と同様に、第４表からも、２０℃以上
に加熱し着磁を行う本発明方法において、高い磁気特性
が得られることが分かる。Margin Table 4 Below Table 4 As with Examples 1 and 2, it can be seen from Table 4 that high magnetic properties can be obtained in the method of the present invention in which magnetization is carried out by heating to 20° C. or higher.
実施例４
特開昭５９−６４７３９号公報および特開昭５９−２１
１５４９号公報などの公知例に基づき、液体急冷法によ
り、組成（Ｈ子％）：１４Ｎｄ−６Ｂ−残Ｆｅのアモル
ファスリボンを作成した。得られたリボンを粉砕し１０
０〜２００μｍの粉砕粉を、加圧力６ｔｏｎ／ｃｉにて
成形後、エポキシ樹脂（５ｗｔ％）を充てんし、１５０
℃Ｘ Ｉ Ｈｒにて、加熱硬化した。得られたプラスチ
ック磁石の形状は、外径１０＋＋ｎ＋、高さ１２ｍｍの
円柱状磁石である。Example 4 JP-A-59-64739 and JP-A-59-21
An amorphous ribbon having a composition (H%) of 14Nd-6B-remaining Fe was prepared by a liquid quenching method based on a known example such as Japanese Patent No. 1549. Crush the obtained ribbon and
After molding the pulverized powder of 0 to 200 μm at a pressure of 6 ton/ci, it was filled with epoxy resin (5 wt%) and
It was cured by heating at ℃X I Hr. The shape of the obtained plastic magnet was a cylindrical magnet with an outer diameter of 10++n+ and a height of 12 mm.
得られた磁石の高さ方向に着磁（１０Ｋ Ｏｅ ）を第
５表に示す温度でＡｒガス気流中にて行い、冷却後、２
０℃にて測定した単体のオープン・フラックス値を第５
表に示す。The obtained magnet was magnetized in the height direction (10 K Oe) in an Ar gas stream at the temperature shown in Table 5, and after cooling,
The open flux value of the single unit measured at 0℃ is the fifth
Shown in the table.
第５表
〔発明の効果〕
以上述べた如く、本発明はＲ−Ｂ−Ｆｅ系磁石の着磁方
法において、磁石を常温からキュリー温度近傍未満の温
度に加熱し、着磁を行うことにより低い着磁磁場強度に
おいても、高い磁気特性が得られる方法を提供するもの
で、その工業的価値は、極めて大きい。Table 5 [Effects of the Invention] As described above, in the method of magnetizing an R-B-Fe magnet, the present invention heats the magnet from room temperature to a temperature below the vicinity of the Curie temperature and magnetizes the magnet. It provides a method that can obtain high magnetic properties even in the magnetizing magnetic field strength, and its industrial value is extremely large.
Claims (6)
のうち少なくとも１種）、ＢおよびＦｅを必須元素とす
るＲ−Ｂ−Ｆｅ系永久磁石をＴ＿１＝３０℃からＴ＿２
＝（Ｔｃ−４０）℃の温度領域（ここでＴｃはキュリー
温度）において着磁することを特徴とする永久磁石の製
造方法。1. An R-B-Fe permanent magnet containing R (where R is at least one rare earth element containing Y such as Nd and Pr), B, and Fe is heated from T_1=30℃ to T_2
A method for producing a permanent magnet, characterized in that magnetization is carried out in a temperature range of = (Tc-40)°C (here, Tc is the Curie temperature).
の範囲第１項記載の永久磁石の製造方法。2. The method for manufacturing a permanent magnet according to claim 1, characterized in that T_1=100°C.
の範囲第１項記載の永久磁石の製造方法。3. The method for manufacturing a permanent magnet according to claim 1, characterized in that T_1=150°C.
の範囲第１項記載の永久磁石の製造方法。4. The method for manufacturing a permanent magnet according to claim 1, characterized in that T_1=200°C.
の範囲第１項記載の永久磁石の製造方法。5. The method for manufacturing a permanent magnet according to claim 1, characterized in that T_1=250°C.
を特徴とする特許請求の範囲第１項から第５項のいずれ
かの項に記載の永久磁石の製造方法。6. 6. The method of manufacturing a permanent magnet according to claim 1, wherein the permanent magnet is heated in a non-oxidizing atmospheric gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62069665A JPS63234503A (en) | 1987-03-24 | 1987-03-24 | Manufacture of permanent magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62069665A JPS63234503A (en) | 1987-03-24 | 1987-03-24 | Manufacture of permanent magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63234503A true JPS63234503A (en) | 1988-09-29 |
Family
ID=13409352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62069665A Pending JPS63234503A (en) | 1987-03-24 | 1987-03-24 | Manufacture of permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63234503A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01297807A (en) * | 1988-05-26 | 1989-11-30 | Daido Steel Co Ltd | Manufacture of permanent magnet |
| JP2013157505A (en) * | 2012-01-31 | 2013-08-15 | Minebea Co Ltd | Method of manufacturing bond magnet |
| JP2017188690A (en) * | 2017-05-12 | 2017-10-12 | ミネベアミツミ株式会社 | Manufacturing method of bond magnet |
| CN113223803A (en) * | 2021-05-22 | 2021-08-06 | 慈溪市兴发磁业科技有限公司 | Low-cost N35 sintered neodymium-iron-boron permanent magnet and preparation method thereof |
-
1987
- 1987-03-24 JP JP62069665A patent/JPS63234503A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01297807A (en) * | 1988-05-26 | 1989-11-30 | Daido Steel Co Ltd | Manufacture of permanent magnet |
| JP2013157505A (en) * | 2012-01-31 | 2013-08-15 | Minebea Co Ltd | Method of manufacturing bond magnet |
| JP2017188690A (en) * | 2017-05-12 | 2017-10-12 | ミネベアミツミ株式会社 | Manufacturing method of bond magnet |
| CN113223803A (en) * | 2021-05-22 | 2021-08-06 | 慈溪市兴发磁业科技有限公司 | Low-cost N35 sintered neodymium-iron-boron permanent magnet and preparation method thereof |
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