JPH04323804A - Rare-earth magnet - Google Patents
Rare-earth magnetInfo
- Publication number
- JPH04323804A JPH04323804A JP3092383A JP9238391A JPH04323804A JP H04323804 A JPH04323804 A JP H04323804A JP 3092383 A JP3092383 A JP 3092383A JP 9238391 A JP9238391 A JP 9238391A JP H04323804 A JPH04323804 A JP H04323804A
- Authority
- JP
- Japan
- Prior art keywords
- rare earth
- earth magnet
- magnets
- ihc
- rare
- 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 44
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 36
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 5
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 5
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 5
- 229910052735 hafnium Inorganic materials 0.000 claims abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 4
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 4
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 4
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 3
- 229910017052 cobalt Inorganic materials 0.000 abstract description 9
- 239000010941 cobalt Substances 0.000 abstract description 9
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052742 iron Inorganic materials 0.000 abstract description 8
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 229910052759 nickel Inorganic materials 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 15
- 239000000203 mixture Substances 0.000 description 13
- 238000005096 rolling process Methods 0.000 description 12
- 239000007788 liquid Substances 0.000 description 10
- 238000010791 quenching Methods 0.000 description 10
- 230000000171 quenching effect Effects 0.000 description 10
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 238000005275 alloying Methods 0.000 description 7
- 229910052772 Samarium Inorganic materials 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000006467 substitution reaction Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 229910052692 Dysprosium Inorganic materials 0.000 description 2
- 229910001047 Hard ferrite Inorganic materials 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 2
- 229910052777 Praseodymium Inorganic materials 0.000 description 2
- 229910000828 alnico Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- -1 M o 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
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Hard Magnetic Materials (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は新規な希土類磁石に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel rare earth magnet.
【０００２】0002
【従来の技術】永久磁石としては、従来、Ｃｏを２０〜
３０重量％含むアルニコ磁石、Ｆｅの酸化物を主成分と
するハードフェライト磁石、Ｃｏを５０〜６０重量％含
み、かつ希土類元素（Ｒ）としてＳｍを含む希土類コバ
ルト磁石が代表的なものとして知られている。[Prior Art] Conventionally, permanent magnets have been made of Co.
Representative examples include alnico magnets containing 30% by weight, hard ferrite magnets containing Fe oxide as a main component, and rare earth cobalt magnets containing 50 to 60% by weight Co and Sm as the rare earth element (R). ing.
【０００３】但し、アルニコ磁石や希土類コバルト磁石
に使用されるＣｏの原料事情が不安定化し、また希土類
コバルト磁石に使用されるＳｍは希土類鉱物中の含有量
が少なく極めて高価である等の理由により、ハードフェ
ライト磁石が永久磁石の主流を占めている。However, the raw material situation for Co used in alnico magnets and rare earth cobalt magnets has become unstable, and Sm used in rare earth cobalt magnets has a low content in rare earth minerals and is extremely expensive. , hard ferrite magnets are the mainstream of permanent magnets.
【０００４】ところが、希土類コバルト磁石は、他の磁
石に比べ、磁気特性が格段に高く、主として小型で、付
加価値の高い磁気回路に必須の磁石とされている。However, rare earth cobalt magnets have much higher magnetic properties than other magnets, and are considered to be essential magnets mainly for small, high-value-added magnetic circuits.
【０００５】そこで、ＣｏやＳｍを含まない希土類磁石
の開発が急務となり、これまで各種の希土類磁石の研究
がなされている。[0005] Therefore, there is an urgent need to develop rare earth magnets that do not contain Co or Sm, and research has been carried out on various rare earth magnets.
【０００６】このような事情から、希土類磁石の開発が
進み、最近、ＣｏやＳｍを含まず、Ｎｄ，Ｐｒ，Ｄｙ，
Ｈｏ，Ｔｂの希土類元素のうちの少なくとも一種８〜３
０ａｔ％と、Ｂ ２〜２８ａｔ％と、残部実質的にＦ
ｅとから成る磁気異方性焼結体の希土類永久磁石、並び
にＮｄ，Ｐｒ，Ｄｙ，Ｈｏ，Ｔｂの希土類元素のうちの
少なくとも一種と、Ｌａ，Ｃｅ，Ｐｍ，Ｓｍ，Ｅｕ，Ｇ
ｄ，Ｅｒ，Ｔｍ，Ｙｂ，Ｌｕ，Ｙの希土類元素のうちの
少なくとも一種の合計８〜３０ａｔ％と、Ｂ ２〜２
８ａｔ％と、残部実質的にＦｅとから成る磁気異方性焼
結体の希土類永久磁石が提案された（特公昭６１−３４
２４２号）。[0006] Under these circumstances, the development of rare earth magnets has progressed, and recently, rare earth magnets that do not contain Co or Sm, such as Nd, Pr, Dy,
At least one of the rare earth elements Ho, Tb 8-3
0 at%, B 2 to 28 at%, and the remainder substantially F
and at least one of the rare earth elements Nd, Pr, Dy, Ho, and Tb, and La, Ce, Pm, Sm, Eu, and G.
A total of 8 to 30 at% of at least one of the rare earth elements d, Er, Tm, Yb, Lu, and Y, and B 2 to 2
A rare earth permanent magnet of a magnetically anisotropic sintered body consisting of 8 at% and the remainder substantially Fe was proposed (Japanese Patent Publication No. 61-34
No. 242).
【０００７】また、液体急冷法を用いて、高磁石特性を
有する永久磁石の製造方法も提案されている（特開昭５
９−６４７３９号）。[0007] Furthermore, a method for manufacturing permanent magnets with high magnetic properties using a liquid quenching method has been proposed (Japanese Patent Application Laid-Open No.
No. 9-64739).
【０００８】[0008]
【発明が解決しようとする課題】前述したＲ−Ｆｅ−Ｂ
系磁石は室温では磁気特性が高い。しかしキュリー温度
が約３００℃であるため温度特性が悪い。[Problem to be solved by the invention] The above-mentioned R-Fe-B
The system magnet has high magnetic properties at room temperature. However, since the Curie temperature is approximately 300° C., the temperature characteristics are poor.
【０００９】本発明の目的はＣｏを全く含有しないで、
またはＣｏを少量しか含有しないでキュリー温度の高い
かつ高磁気特性を有する希土類磁石を提供することにあ
る。[0009] The object of the present invention is to contain no Co at all.
Another object of the present invention is to provide a rare earth magnet that contains only a small amount of Co, has a high Curie temperature, and has high magnetic properties.
【００１０】0010
【課題を解決するための手段】本発明に係る希土類磁石
は、上記目的を達成するために、７〜３０ａｔ％のＲ（
但しＲはＹを含む希土類元素の１種または２種以上）、
２〜２５ａｔ％のα（但しαはＢｅ，Ｓｉ，Ｐ，Ｓのう
ちの１種または２種以上）、０．１〜１８ａｔ％のＴ（
但しＴはＴｉ，Ｚｒ，Ｈｆ，Ｖ，Ｎｂ，Ｔａ，Ｃｒ，Ｍ
ｏ，Ｗ，Ｍｎ，Ｎｉ，Ｃｕのうちの１種または２種以上
）、残部Ｆｅから成るものであり、本発明ではまた前記
Ｆｅを０＜Ｃｏ／Ｆｅ≦１の範囲でＣｏと置換するもの
も提供される。[Means for Solving the Problems] In order to achieve the above object, the rare earth magnet according to the present invention has an R(
However, R is one or more rare earth elements including Y),
2 to 25 at% α (however, α is one or more of Be, Si, P, and S), 0.1 to 18 at% T (
However, T is Ti, Zr, Hf, V, Nb, Ta, Cr, M
o, W, Mn, Ni, Cu), and the balance is Fe, and in the present invention, the Fe is also replaced with Co in the range of 0<Co/Fe≦1. is also provided.
【００１１】本発明に係る希土類磁石（Ｒ−Ｆｅ−α系
磁石）においては、上述した組成領域で高磁気特性が発
生する。In the rare earth magnet (R-Fe-α magnet) according to the present invention, high magnetic properties occur in the above-mentioned composition range.
【００１２】このような作用を確保するためには、各成
分を上記の量含有させることが必要であり、順にその理
由を述べれば、まずイットリウムＹを含む希土類元素の
１種又は２種以上であるＲにおいては、少なくとも７ａ
ｔ％の含有量とする必要がある。但しＲ含有量が多くな
り過ぎると残留磁束密度（Ｂｒ）、最大エネルギー積（
（ＢＨ）ｍａｘ ）が低下するため、３０ａｔ％以下と
することが重要であり、従ってＲは７〜３０ａｔ％の範
囲の量含有させるが、好ましいＲ含有量は９〜２５ａｔ
％である。[0012] In order to ensure such an effect, it is necessary to contain each component in the above-mentioned amounts. To explain the reasons in order, first, one or more rare earth elements including yttrium Y must be contained. In some R, at least 7a
It is necessary to set the content to t%. However, if the R content becomes too large, the residual magnetic flux density (Br) and the maximum energy product (
(BH)max) decreases, it is important to keep the R content at 30 at% or less. Therefore, R is contained in an amount in the range of 7 to 30 at%, but the preferable R content is 9 to 25 at%.
%.
【００１３】また、α即ちＢｅ，Ｓｉ，Ｐ，Ｓのうちの
１種または２種以上の含有量が少なくなり過ぎると保磁
力（ｉＨｃ），Ｂｒ，（ＢＨ）ｍａｘ が低下する。一
方αの含有量が多くなり過ぎてもｉＨｃが減少してしま
うため、αは２〜２５ａｔ％とする必要がある。好まし
くは５〜２０ａｔ％である。[0013] Furthermore, if the content of one or more of Be, Si, P, and S becomes too low, the coercive force (iHc), Br, and (BH)max decrease. On the other hand, if the content of α becomes too large, iHc decreases, so α needs to be 2 to 25 at%. Preferably it is 5 to 20 at%.
【００１４】さらに、Ｔ即ちＴｉ，Ｚｒ，Ｈｆ，Ｖ，Ｎ
ｂ，Ｔａ，Ｃｒ，Ｍｏ，Ｗ，Ｍｎ，Ｎｉ，Ｃｕのうちの
１種または２種以上の遷移元素を添加することによって
磁気特性が向上する。Ｔの添加量が０．１ａｔ％未満で
はｉＨｃが小さくＴ添加量が１８ａｔ％を超えるとＢｒ
，（ＢＨ）ｍａｘ が小さくなってしまうためＴは０．
１〜１８ａｔ％とする必要がある。好ましくは１〜１５
ａｔ％である。Furthermore, T, that is, Ti, Zr, Hf, V, N
The magnetic properties are improved by adding one or more transition elements selected from the group consisting of B, Ta, Cr, Mo, W, Mn, Ni, and Cu. When the added amount of T is less than 0.1 at%, iHc is small and when the added amount of T exceeds 18 at%, Br
, (BH)max becomes small, so T becomes 0.
It is necessary to set it to 1-18at%. Preferably 1-15
It is at%.
【００１５】本発明の希土類磁石は原則として原料事情
の不安定なコバルトを含有しないものであるが、コバル
トの含有により高い磁気特性が得られるため、Ｆｅの一
部をＣｏで置換することにより少量のコバルトを含有さ
せることもできる。その場合、Ｃｏ置換量が多くなるほ
どキュリー温度は上昇するが、Ｃｏ置換量が多くなり過
ぎるとｉＨｃが減少してしまう。そのため一部コバルト
で置換するときはＦｅを０＜Ｃｏ／Ｆｅ≦１の範囲内で
Ｃｏと置換する必要がある。In principle, the rare earth magnet of the present invention does not contain cobalt, which is unstable as a raw material, but since high magnetic properties can be obtained by containing cobalt, a small amount can be added by replacing a part of Fe with Co. It is also possible to contain cobalt. In that case, as the amount of Co substitution increases, the Curie temperature increases, but if the amount of Co substitution increases too much, iHc decreases. Therefore, when partially replacing Fe with cobalt, it is necessary to replace Fe with Co within the range of 0<Co/Fe≦1.
【００１６】このような成分の希土類磁石を製造するに
あたっては粉末冶金法、プラズマ焼結法、或は普通の焼
結法を用いることができるが、液体急冷法を用いるのが
好ましい。比較的保磁力を出しやすいからである。Although a powder metallurgy method, a plasma sintering method, or an ordinary sintering method can be used to produce a rare earth magnet having such components, it is preferable to use a liquid quenching method. This is because it is relatively easy to generate coercive force.
【００１７】従ってまず一定比率の各成分の粉末の混合
物をつくり、これをアーク溶解炉で溶解したのち液体急
冷装置で急冷する。これには片ロール法と双ロール法と
があり、一般に片ロール法が用いられる。片ロール法は
高周波溶解炉の底部から千数百度で出てくる合金溶解物
をその下で一定周速度で回転する常温の一つのロールで
受けて急冷させるのである。双ロール法の場合は炉の下
で互に接触しつつ反対方向に回転する二つの常温のロー
ル間に流して急冷させるのであるがあまり一般的ではな
い。このようにして急冷した後熱処理を行なうのである
。[0017] Therefore, first, a mixture of powders of each component in a fixed ratio is prepared, melted in an arc melting furnace, and then quenched in a liquid quenching device. There are a single roll method and a double roll method, and the single roll method is generally used. In the single-roll method, the melted alloy that comes out of the bottom of the high-frequency melting furnace at a temperature of over 1,000 degrees Celsius is quenched by being received by a single roll at room temperature that rotates at a constant circumferential speed underneath. In the case of the twin roll method, the material is rapidly cooled by flowing it between two rolls at room temperature that rotate in opposite directions while contacting each other under a furnace, but this is not very common. After rapid cooling in this manner, heat treatment is performed.
【００１８】[0018]
【実施例】以下に本発明の希土類磁石の実施例を示す。
しかし本発明はこの実施例に限定されると解さるべきで
はない。ここには各磁石の製法も示されており、また各
成分の量或は種類を変えたとき、Ｃｏ／Ｆｅの比を変え
たときの各磁石の磁気特性を測定して示した。これによ
り夫々規定範囲外では良好な磁気特性がえられないこと
が明らかである。[Examples] Examples of rare earth magnets of the present invention are shown below. However, the invention should not be construed as limited to this example. The manufacturing method for each magnet is also shown here, and the magnetic properties of each magnet are measured and shown when the amount or type of each component is changed and when the Co/Fe ratio is changed. It is clear from this that good magnetic properties cannot be obtained outside the respective specified ranges.
【００１９】〔実施例１〕下記の第１工程（前工程）及
び第２工程（熱処理工程）を経て、Ｐｒを６〜３１ａｔ
％の範囲内で表１に示すように種々変化させた、Ｓｉ：
８ａｔ％，Ｃｒ：５ａｔ％，Ｃｏ：１５ａｔ％，Ｆｅ：
残部の組成を有する本発明に係るＲ−Ｆｅ−α系希土類
磁石を調製した。[Example 1] Through the following first step (pre-step) and second step (heat treatment step), Pr was reduced to 6 to 31 at.
Si was varied within the range of % as shown in Table 1:
8 at%, Cr: 5 at%, Co: 15 at%, Fe:
An R-Fe-α rare earth magnet according to the present invention having the remaining composition was prepared.
【００２０】第１工程（前工程）
必要とする合金元素をアーク溶解炉で溶解し液体急冷装
置（片ロール法）で周速度３０ｍ／ｓ で合金を急冷し
た。First Step (Pre-Step) Necessary alloying elements were melted in an arc melting furnace, and the alloy was rapidly cooled in a liquid quenching device (single roll method) at a circumferential speed of 30 m/s.
【００２１】第２工程（熱処理工程）
第１工程で得た急冷薄帯を６００℃で２時間の熱処理を
行った。Second step (heat treatment step) The quenched ribbon obtained in the first step was heat treated at 600° C. for 2 hours.
【００２２】表１は、上記の組成を有する本発明に係る
Ｒ−Ｆｅ−α系希土類磁石のＰｒ含有量に対するｉＨｃ
，Ｂｒ，（ＢＨ）ｍａｘ の測定結果を示したものであ
る。Table 1 shows the iHc with respect to the Pr content of the R-Fe-α rare earth magnet according to the present invention having the above composition.
, Br, (BH)max.
【００２３】
表１から明らかなようにＰｒ含有量が７ａｔ％未満
ではｉＨｃが小さく、Ｐｒ含有量が３０ａｔ％を超える
とＢｒ，（ＢＨ）ｍａｘ が小さくなってしまう。[0023]As is clear from Table 1, when the Pr content is less than 7 at%, iHc is small, and when the Pr content exceeds 30 at%, Br, (BH)max becomes small.
【００２４】〔実施例２〕下記の第１工程（前工程）及
び第２工程（熱処理工程）を経て、Ｐを１〜２７ａｔ％
の範囲内で表２に示すように種々変化させた、Ｐｒ：１
４ａｔ％，Ｚｒ：５ａｔ％，Ｆｅ：残部の組成を有する
本発明に係るＲ−Ｆｅ−α系希土類磁石を調製した。[Example 2] Through the following first step (pre-process) and second step (heat treatment step), P was reduced to 1 to 27 at%.
Pr:1 was varied as shown in Table 2 within the range of
An R-Fe-α rare earth magnet according to the present invention having a composition of 4 at%, Zr: 5 at%, and Fe: the balance was prepared.
【００２５】第１工程（前工程）
必要とする合金元素をアーク溶解炉で溶解し、液体急冷
装置（片ロール法）で周速度３０ｍ／ｓ で合金を急冷
した。First Step (Pre-Step) Necessary alloying elements were melted in an arc melting furnace, and the alloy was rapidly cooled in a liquid quenching device (single roll method) at a circumferential speed of 30 m/s.
【００２６】第２工程（熱処理工程）
第１工程で得た急冷薄帯を６００℃で２時間の熱処理を
行った。Second step (heat treatment step) The quenched ribbon obtained in the first step was heat treated at 600° C. for 2 hours.
【００２７】表２は、上記の組成を有する本発明に係る
Ｒ−Ｆｅ−α系希土類磁石のＰ含有量に対するｉＨｃ，
Ｂｒ，（ＢＨ）ｍａｘ の測定結果を示したものである
。Table 2 shows iHc,
It shows the measurement results of Br, (BH)max.
【００２８】
表２から明らかなように、Ｐ含有量が２ａｔ％未満
ではｉＨｃ，Ｂｒ，（ＢＨ）ｍａｘ が小さくＰ含有量
が２５ａｔ％を超えるとｉＨｃは小さくなってしまう。As is clear from Table 2, when the P content is less than 2 at %, iHc, Br, (BH) max is small, and when the P content exceeds 25 at %, iHc is small.
【００２９】〔実施例３〕下記の第１工程（前工程）及
び第２工程（熱処理工程）を経て、Ｎｂを０〜１９ａｔ
％の範囲内で表３に示すように種々変化させた、Ｐｒ：
１１ａｔ％，Ｂｅ：７ａｔ％，Ｃｏ：１０ａｔ％，Ｆｅ
：残部の組成を有する本発明に係るＲ−Ｆｅ−α系希土
類磁石を調製した。[Example 3] Through the following first step (pre-process) and second step (heat treatment step), Nb was reduced to 0 to 19 at.
Pr was varied within the range of % as shown in Table 3:
11at%, Be: 7at%, Co: 10at%, Fe
: An R-Fe-α-based rare earth magnet according to the present invention having the composition of the remainder was prepared.
【００３０】第１工程（前工程）
必要とする合金元素をアーク溶解炉で溶解し、液体急冷
装置（片ロール法）で周速度３０ｍ／ｓ で合金を急冷
した。First Step (Pre-Step) Necessary alloying elements were melted in an arc melting furnace, and the alloy was rapidly cooled in a liquid quenching device (single roll method) at a peripheral speed of 30 m/s.
【００３１】第２工程（熱処理工程）
第１工程で得た急冷薄帯を６００℃で２時間の熱処理を
行った。Second step (heat treatment step) The quenched ribbon obtained in the first step was heat treated at 600° C. for 2 hours.
【００３２】表３は、上記の組成を有する本発明に係る
Ｒ−Ｆｅ−α系希土類磁石のＮｂ含有量に対するｉＨｃ
，Ｂｒ，（ＢＨ）ｍａｘ の測定結果を示したものであ
る。Table 3 shows the iHc relative to the Nb content of the R-Fe-α rare earth magnet according to the present invention having the above composition.
, Br, (BH)max.
【００３３】
表３から明らかなように、Ｎｂ含有量が０．１ａｔ％未
満ではｉＨｃが小さくＮｂ含有量が１８ａｔ％を超える
とＢｒ，（ＢＨ）ｍａｘ が小さくなってしまう。As is clear from Table 3, when the Nb content is less than 0.1 at %, iHc is small, and when the Nb content exceeds 18 at %, Br, (BH) max becomes small.
【００３４】〔実施例４〕下記の第１工程（前工程）及
び第２工程（熱処理工程）を経て、Ｐｒを５〜１１ａｔ
％，Ｃｅを０〜６ａｔ％（但しＰｒ＋Ｃｅ＝１１ａｔ％
）の範囲内で表４に示すように種々変化させ、Ｓ：１１
ａｔ％，Ｗ：５ａｔ％，Ｆｅ：残部の組成を有する本発
明に係るＲ−Ｆｅ−α系希土類磁石を調製した。[Example 4] Through the following first step (pre-step) and second step (heat treatment step), Pr was reduced to 5 to 11 at.
%, Ce from 0 to 6at% (however, Pr+Ce=11at%
) as shown in Table 4, S: 11
An R-Fe-α rare earth magnet according to the present invention having a composition of 5 at%, W: 5 at%, and Fe: the balance was prepared.
【００３５】第１工程（前工程）
必要とする合金元素をアーク溶解炉で溶解し、液体急冷
装置（片ロール法）で周速度３０ｍ／ｓ で合金を急冷
した。First Step (Pre-Step) Necessary alloying elements were melted in an arc melting furnace, and the alloy was rapidly cooled at a circumferential speed of 30 m/s in a liquid quenching device (single roll method).
【００３６】第２工程（熱処理工程）
第１工程で得た急冷薄帯を６００℃で２時間の熱処理を
行った。Second step (heat treatment step) The quenched ribbon obtained in the first step was heat treated at 600° C. for 2 hours.
【００３７】表４は、上記の組成を有する本発明に係る
Ｒ−Ｆｅ−α系希土類磁石のＣｅ含有量に対するｉＨｃ
，Ｂｒ，（ＢＨ）ｍａｘ の測定結果を示したものであ
る。Table 4 shows the iHc relative to the Ce content of the R-Fe-α rare earth magnet according to the present invention having the above composition.
, Br, (BH)max.
【００３８】
表４から明らかなように、ＰｒのＣｅ置換量に応じて磁
気特性が変化するが、実用上充分な磁気特性が得られる
ことが判る。このことはＰｒ以外のＲ（Ｙを含む）であ
っても有効であることを明示するものである。As is clear from Table 4, although the magnetic properties change depending on the amount of Ce substituted for Pr, it can be seen that practically sufficient magnetic properties can be obtained. This clearly shows that R (including Y) other than Pr is also valid.
【００３９】〔実施例５〕下記の第１工程（前工程）及
び第２工程（熱処理工程）を経て、αとして表５に示す
ものを使用し、Ｐｒ：１２ａｔ％，Ｍｎ：５ａｔ％，α
：７ａｔ％，Ｆｅ：残部の組成を有する本発明に係るＲ
−Ｆｅ−α系希土類磁石を調製した。[Example 5] Through the following first step (pre-step) and second step (heat treatment step), α shown in Table 5 was used, Pr: 12 at%, Mn: 5 at%, α
R according to the present invention having a composition of: 7at%, Fe: the balance
A -Fe-α rare earth magnet was prepared.
【００４０】第１工程（前工程）
必要とする合金元素をアーク溶解炉で溶解し、液体急冷
装置（片ロール法）で周速度３０ｍ／ｓ で合金を急冷
した。First Step (Pre-Step) Necessary alloying elements were melted in an arc melting furnace, and the alloy was rapidly cooled in a liquid quenching device (single roll method) at a circumferential speed of 30 m/s.
【００４１】第２工程（熱処理工程）
第１工程で得た急冷薄帯を６００℃で２時間の熱処理を
行った。Second step (heat treatment step) The quenched ribbon obtained in the first step was heat treated at 600° C. for 2 hours.
【００４２】表５は、上記の組成を有する本発明に係る
Ｒ−Ｆｅ−α系希土類磁石のαに対するｉＨｃ，Ｂｒ，
（ＢＨ）ｍａｘ の測定結果を示したものである。Table 5 shows the iHc, Br,
It shows the measurement results of (BH)max.
【００４３】
表５から明らかなように、αの種類が変わると磁気
特性も変化するが、いずれの種類のαであっても実用上
充分な磁気特性が得られることが判る。As is clear from Table 5, the magnetic properties change as the type of α changes, but it can be seen that practically sufficient magnetic properties can be obtained regardless of the type of α.
【００４４】〔実施例６〕下記の第１工程（前工程）及
び第２工程（熱処理工程）を経て、Ｔとして表６に示す
ものを使用しＰｒ：１５ａｔ％，Ｐ：５ａｔ％，Ｔ：５
ａｔ％，Ｃｏ：１０ａｔ％，Ｆｅ：残部の組成を有する
本発明に係るＲ−Ｆｅ−α系希土類磁石を調製した。
第１工程（前工程）
必要とする合金元素をアーク溶解炉で溶解し、液体急冷
装置（片ロール法）で周速度３０ｍ／ｓ で合金を急冷
した。[Example 6] After the following first step (pre-step) and second step (heat treatment step), the T shown in Table 6 was used, Pr: 15 at%, P: 5 at%, T: 5
An R-Fe-α rare earth magnet according to the present invention having a composition of Co: 10 at% and Fe: the balance was prepared.
First Step (Pre-Step) The necessary alloying elements were melted in an arc melting furnace, and the alloy was rapidly cooled at a circumferential speed of 30 m/s in a liquid quenching device (single roll method).
【００４５】第２工程（熱処理工程）
第１工程で得た急冷薄帯を６００℃で２時間の熱処理を
行った。Second step (heat treatment step) The quenched ribbon obtained in the first step was heat treated at 600° C. for 2 hours.
【００４６】表６は、上記の組成を有する本発明に係る
Ｒ−Ｆｅ−α系希土類磁石のＴに対するｉＨｃ，Ｂｒ，
（ＢＨ）ｍａｘ の測定結果を示したものである。Table 6 shows iHc, Br,
It shows the measurement results of (BH)max.
【００４７】
表６から明らかなように、Ｔの種類が変わると磁気
特性も変化するが、いずれの種類のＴであっても実用上
充分な磁気特性が得られることが判る。As is clear from Table 6, when the type of T changes, the magnetic properties also change, but it can be seen that practically sufficient magnetic properties can be obtained with any type of T.
【００４８】〔実施例７〕下記の第１工程（前工程）及
び第２工程（熱処理工程）を経て、Ｃｏ／Ｆｅを０〜１
．１の範囲内で表７に示すように種々置換して、Ｐｒ：
１３ａｔ％，Ｓｉ：５ａｔ％，Ｍｏ：７ａｔ％，残部Ｆ
ｅとＣｏの組成を有する本発明に係るＲ−Ｆｅ−α系希
土類磁石を調製した。[Example 7] Through the following first step (pre-process) and second step (heat treatment step), Co/Fe was reduced to 0 to 1.
．． Within the range of 1, Pr:
13 at%, Si: 5 at%, Mo: 7 at%, balance F
An R-Fe-α rare earth magnet according to the present invention having a composition of e and Co was prepared.
【００４９】第１工程（前工程）
必要とする合金元素をアーク溶解炉で溶解し、液体急冷
装置（片ロール法）で周速度３０ｍ／ｓ で合金を急冷
した。First Step (Pre-Step) Necessary alloying elements were melted in an arc melting furnace, and the alloy was rapidly cooled in a liquid quenching device (single roll method) at a peripheral speed of 30 m/s.
【００５０】第２工程（熱処理工程）
第１工程で得た急冷薄帯を６００℃で２時間の熱処理を
行った。Second step (heat treatment step) The quenched ribbon obtained in the first step was heat treated at 600° C. for 2 hours.
【００５１】表７は、上記の組成を有する本発明に係る
Ｒ−Ｆｅ−α系希土類磁石のＣｏ／Ｆｅに対するｉＨｃ
，Ｂｒ，（ＢＨ）ｍａｘ の測定結果を示したものであ
る。キュリー温度の測定結果も示しておく。Table 7 shows the iHc for Co/Fe of the R-Fe-α rare earth magnet according to the present invention having the above composition.
, Br, (BH)max. The results of Curie temperature measurements are also shown.
【００５２】
表７から明らかなように、Ｃｏ置換量が多くなるに
従ってキュリー温度が上昇するが、Ｃｏ置換量がＣｏ／
Ｆｅ＝１を超えるとｉＨｃが小さくなる。As is clear from Table 7, the Curie temperature increases as the Co substitution amount increases, but as the Co substitution amount increases
When Fe=1 is exceeded, iHc becomes small.
【００５３】本発明のＲ−Ｆｅ−α系希土類磁石（Ｃｏ
／Ｆｅ＝０）のキュリー温度は従来のＲ−Ｆｅ−Ｂ系希
土類磁石のキュリー温度より約４０℃高い。[0053] The R-Fe-α rare earth magnet (Co
/Fe=0) is about 40° C. higher than the Curie temperature of the conventional R-Fe-B rare earth magnet.
【００５４】[0054]
【発明の効果】以上詳述したように、本発明に係るＲ−
Ｆｅ−α系希土類磁石によれば、従来のもののようにＣ
ｏを多量に含まなくても、またＢを含まなくても高磁気
特性を確保することができる。また高いキュリー温度を
有する。Effects of the Invention As detailed above, R-
According to Fe-α rare earth magnets, C
High magnetic properties can be ensured even without containing a large amount of o or B. It also has a high Curie temperature.
Claims (2)
土類元素の１種または２種以上）、２〜２５ａｔ％のα
（但しαはＢｅ，Ｓｉ，Ｐ，Ｓのうちの１種または２種
以上）、０．１〜１８ａｔ％のＴ（但しＴはＴｉ，Ｚｒ
，Ｈｆ，Ｖ，Ｎｂ，Ｔａ，Ｃｒ，Ｍｏ，Ｗ，Ｍｎ，Ｎｉ
，Ｃｕのうちの１種または２種以上）、残部Ｆｅから成
ることを特徴とする希土類磁石。Claim 1: 7 to 30 at% R (where R is one or more rare earth elements including Y), 2 to 25 at% α
(However, α is one or more of Be, Si, P, and S), 0.1 to 18 at% T (However, T is Ti, Zr
, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Ni
, Cu), and the balance is Fe.
ｏと置換することを特徴とする請求項１記載の希土類磁
石。2. The Fe is C in the range of 0<Co/Fe≦1.
2. The rare earth magnet according to claim 1, wherein the rare earth magnet is replaced with o.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3092383A JPH04323804A (en) | 1991-04-23 | 1991-04-23 | Rare-earth magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3092383A JPH04323804A (en) | 1991-04-23 | 1991-04-23 | Rare-earth magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04323804A true JPH04323804A (en) | 1992-11-13 |
Family
ID=14052905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3092383A Pending JPH04323804A (en) | 1991-04-23 | 1991-04-23 | Rare-earth magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04323804A (en) |
-
1991
- 1991-04-23 JP JP3092383A patent/JPH04323804A/en active Pending
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