JPH0498802A - Permanent magnet - Google Patents
Permanent magnetInfo
- Publication number
- JPH0498802A JPH0498802A JP2215922A JP21592290A JPH0498802A JP H0498802 A JPH0498802 A JP H0498802A JP 2215922 A JP2215922 A JP 2215922A JP 21592290 A JP21592290 A JP 21592290A JP H0498802 A JPH0498802 A JP H0498802A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- heat treatment
- content
- rare earth
- present
- 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.)
- Granted
Links
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 21
- 229910052796 boron Inorganic materials 0.000 claims description 6
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052735 hafnium Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 229910052715 tantalum Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 description 30
- 238000010438 heat treatment Methods 0.000 description 24
- 150000002910 rare earth metals Chemical class 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 238000010791 quenching Methods 0.000 description 7
- 230000000171 quenching effect Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910017052 cobalt Inorganic materials 0.000 description 4
- 239000010941 cobalt Substances 0.000 description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052772 Samarium Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 229910052692 Dysprosium Inorganic materials 0.000 description 2
- 229910052777 Praseodymium Inorganic materials 0.000 description 2
- 229910000828 alnico Inorganic materials 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910001047 Hard ferrite Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910004168 TaNb 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
- 238000005275 alloying 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
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052727 yttrium Inorganic materials 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
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は希土類−鉄−ホウ素系（以下、ｒＲ−Ｆｅ−Ｂ
系」という）永久磁石に関し、特に希土類含有量の少な
くかつホウ素含有量の多い領域で遷移金属Ｔ（ＴはＷ、
Ｔａ、Ｎｂ、Ｍｏ、Ｔｉ。Detailed Description of the Invention (Field of Industrial Application) The present invention is directed to rare earth-iron-boron (hereinafter referred to as rR-Fe-B)
With regard to permanent magnets (referred to as "systems"), transition metals T (T is W,
Ta, Nb, Mo, Ti.
Ｚｒ、Ｈｆ、Ｖ、Ｃｒ、Ｍｎの１種または２種以上）を
含有するＲ−Ｆｅ−Ｂ系永久磁石に関するものである。The present invention relates to an R-Fe-B permanent magnet containing one or more of Zr, Hf, V, Cr, and Mn.
（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５０〜６５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か代表
的なものとして知られている。(Prior Art) Conventional permanent magnets include alnico magnets containing 20 to 30% by weight of CO, hard ferrite magnets containing Fe oxide as a main component, and magnets containing 50 to 65% by weight of CO and rare earth elements (R ) is known as a typical rare earth cobalt magnet containing Sm.
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 the Sm used in rare earth cobalt magnets has a low content in rare earth minerals and is extremely expensive. Magnets are the mainstream of permanent magnets.
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.
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。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.
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。Due to these circumstances, the development of rare earth magnets has progressed, and recently,
Does not contain Co or Sm, contains Nd, Pr, and Dy.
Ｈｏ、Ｔｂの希土類元素のうちの少なくとも一種８〜３
０ａｔ％と、８２〜２８ａｔ％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、並びにＮ
ｄ、Ｐｒ、Ｄｙ、Ｈｏ、Ｔｂの希土類元素のうちの少な
くとも一種と、Ｌａ、Ｃｅ。At least one of the rare earth elements Ho, Tb 8-3
A rare earth permanent magnet of a magnetically anisotropic sintered body consisting of 0 at%, 82 to 28 at%, and the balance substantially Fe, and N
at least one of the rare earth elements d, Pr, Dy, Ho, and Tb, and La and Ce.
Ｐｍ、Ｓｍ、Ｅｕ、Ｇｄ、Ｅｒ、Ｔｍ、Ｙｂ。Pm, Sm, Eu, Gd, 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、８２〜２８ａｔ％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が提案
された（特公昭８１−３４２４２号）。A total of 8 of at least one rare earth element of Lu and Y
~30at%, 82~28at%, and the remainder is substantially F
A magnetically anisotropic sintered rare earth permanent magnet consisting of e was proposed (Japanese Patent Publication No. 81-34242).
また、液体急冷法を用いて、低希土類含有量で、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５９−６４７３９号）。Furthermore, a method for producing a permanent magnet with a low rare earth content and high magnetic properties using a liquid quenching method has also been proposed (Japanese Patent Laid-Open No. 59-64739).
（発明が解決しようとする課題）
希土類元素は高価であるため、できるだけ少ないことが
望まれる。(Problems to be Solved by the Invention) Rare earth elements are expensive, so it is desirable to have as few rare earth elements as possible.
しかし、前述した従来の永久磁石は、いずれも、成る程
度は希土類元素含有量の低減目的を達成しているものの
、８ａｔ％以上の含有量は必要とされており、これより
少ないと充分な磁石特性を得ることができない。However, although the above-mentioned conventional permanent magnets have all achieved the purpose of reducing the rare earth element content to a certain extent, a content of 8 at% or more is required, and if it is less than this, the magnet is insufficient. Unable to obtain properties.
従って、この分原料コスト高となっている。Therefore, the raw material cost increases accordingly.
本発明は以上の諸点に鑑みてなされたもので、その目的
とするところは、希土類含有量が８ａｔ％以下において
高保磁力、高エネルギー積を示す永久磁石を提供するこ
とにある。The present invention has been made in view of the above points, and its object is to provide a permanent magnet that exhibits high coercive force and high energy product when the rare earth content is 8 at% or less.
［課題を解決するための手段］
本発明に係る永久磁石は、上記目的と達成するために、
２〜６ａｔ％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）、１０〜３０ａｔ％のＢ、１〜１８
ａｔ％のＴ（ＴはＷ、ＴａＮｂ Ｍｏ、Ｔｉ、Ｚｒ、
Ｈｆ、Ｖ、Ｃｒ、Ｍｎの１種または２種以上）、残部Ｆ
ｅから成ることを特徴とする。[Means for Solving the Problems] In order to achieve the above objects, the permanent magnet according to the present invention has the following features:
2 to 6 at% of R (however, R is 1 of a rare earth element containing Y)
species or two or more species), 10 to 30 at% B, 1 to 18
at% of T (T is W, TaNb Mo, Ti, Zr,
one or more of Hf, V, Cr, Mn), the remainder F
It is characterized by consisting of e.
本発明に係る永久磁石は、上記組成領域の溶融合金を液
体急冷法により急冷し、この後、必要に応じて５００〜
９００℃で熱処理して得ることができる。The permanent magnet according to the present invention is produced by quenching the molten alloy in the above composition range by a liquid quenching method, and then, if necessary,
It can be obtained by heat treatment at 900°C.
この場合、液体急冷法により組織の結晶粒を微細に析出
させることができ、上記の熱処理によりこの結晶粒の粒
径を適切な大きさに調整することができる。In this case, the crystal grains of the structure can be finely precipitated by the liquid quenching method, and the grain size of the crystal grains can be adjusted to an appropriate size by the heat treatment described above.
熱処理温度は５００℃未満では熱処理効果がなく、９０
０℃を超えるとｉＨｃ 、Ｂ ｒ 、（ＢＨ）ｓａｘが
低くなる。If the heat treatment temperature is less than 500℃, there will be no heat treatment effect;
When the temperature exceeds 0°C, iHc, B r and (BH)sax decrease.
なお、上記の液体急冷法における急冷条件を適切にすれ
ば、急冷体の結晶粒が最適となるため、上記の熱処理は
不要となる。Note that if the quenching conditions in the liquid quenching method described above are appropriate, the crystal grains of the quenched body become optimal, so the above heat treatment becomes unnecessary.
（作 用）
本発明に係る永久磁石（Ｒ−Ｆｅ−Ｂ系磁石）において
は、低ＲＩＥＢ領域で保磁力（ｉＨｃ）が発生する。(Function) In the permanent magnet (R-Fe-B magnet) according to the present invention, coercive force (iHc) is generated in the low RIEB region.
このようなＲの作用を確保するためには、少なくとも２
ａｔ％のＲ含有量とする必要がある。但し、Ｒの含有量
が多くなり過ぎると保磁力（ｉＨｃ）、残留磁束密度（
Ｂｒ）、最大エネルギー積（（ＢＨ） ）が低下す
るため、６ａｔ％以下とｓａｘ
することが重要であり、好ましいＲ含有量は２．５〜５
ａｔ％である。In order to ensure such an effect of R, at least 2
It is necessary to set the R content to at%. However, if the R content becomes too large, the coercive force (iHc) and residual magnetic flux density (
Since the maximum energy product ((BH)) decreases, it is important to keep the R content to 6 at% or less, and the preferable R content is 2.5 to 5.
It is at%.
また、Ｂの含有量が少なくなり過ぎると、ｉＨｃ、Ｂｒ
、（ＢＨ） か低下する。一方、Ｂの■ａＸ
含有量が多くなり過ぎても、Ｂｒ、（ＢＨ）ｌ、ｘが減
少してしまうため、Ｂは１０〜３０ａｔ９６とする必要
がある。好ましくは１３〜２５ａ【％である。Also, if the B content becomes too low, iHc, Br
, (BH) decreases. On the other hand, even if the aX content of B becomes too large, Br, (BH)l, and x will decrease, so B needs to be 10 to 30at96. Preferably it is 13-25a[%.
さらに、Ｔは１ａＬ％未満であるとｉＨｃ、Ｂｒ。Furthermore, when T is less than 1aL%, iHc, Br.
（ＢＨ） が小さく、１８ａｔ％を超えるとＢｒ。(BH) is small and exceeds 18 at%, Br.
ａＸ （ＢＨ） が小さくなる。好ましくは２〜１５ａＸ ａｔ％である。aX (BH) becomes smaller. Preferably 2-15aX It is at%.
（実施例）
実施例１
下記の第１工程（前工程）及び第２工程（熱処理）を経
て、Ｎｄを１〜７ａｔ％の範囲内で第１表に示すように
種々変化させ、Ｂ：２０ａｔ％、Ｗ：５ａｔ％、Ｆｅ：
残部の組成を有する本発明に係るＲ−Ｆｅ−Ｂ系永久磁
石を調製した。(Example) Example 1 Through the following first step (pre-step) and second step (heat treatment), Nd was varied in the range of 1 to 7 at% as shown in Table 1, and B: 20 at% %, W: 5at%, Fe:
An R-Fe-B permanent magnet according to the present invention having the remaining composition was prepared.
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３０ ｍ ／ ｓで合金を
急冷した。First Step (Pre-Step) The required 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).
第２工程（熱処理工程）
第１工程で得た急冷体を７００℃で１時間の熱処理を行
った。Second step (heat treatment step) The quenched body obtained in the first step was heat treated at 700° C. for 1 hour.
以上のようにして得られた本発明に係るＲ−Ｆｅ−Ｂ系
永久磁石のｉ ＨＣ，Ｂ ｒ、 （ＢＨ） ｗａｘを
測定し、その結果をＮｄ含有量との対比で第１表に示し
た。The i HC, Br, (BH) wax of the R-Fe-B permanent magnet according to the present invention obtained as described above was measured, and the results are shown in Table 1 in comparison with the Nd content. Ta.
第１表から明らかなように、Ｎｄ含有量が２ａｔ％未満
ではｉＨｃ、Ｂｒ、（ＢＨ） が小さａＸ
く、Ｎｄ含有量が６ａｔ％を超えてもｉＨｃ、Ｂｒ。As is clear from Table 1, iHc, Br, (BH) are small when the Nd content is less than 2 at%, and iHc and Br are small even when the Nd content exceeds 6 at%.
（ＢＨ） は小さくなってしまう。(BH) becomes small.
曙ａＸ
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、Ｂを８〜３２ａｔ％の範囲内で第２表に示すよ
うに種々変化させ、Ｎｄ：４ａｔ％、Ｗ：５ａｔ％、Ｆ
ｅ：残部の組成を有する本発明に係るＲ−Ｆｅ−Ｂ系永
久磁石を調製した。Akebono aX Example 2 The following first step (pre-process) and second step (heat treatment step)
After that, B was varied in the range of 8 to 32 at% as shown in Table 2, Nd: 4 at%, W: 5 at%, F
e: An R-Fe-B permanent magnet according to the present invention having the composition of the remainder was prepared.
第１工程（前工程） 実施例１に同じ。1st process (pre-process) Same as Example 1.
第２工程（熱処理工程） 実施例１に同じ。2nd process (heat treatment process) Same as Example 1.
このようにして得た本発明に係るＲ−Ｆｅ−Ｂ系永久磁
石のｉ Ｈｃ、Ｂ ｒ、（ＢＨ） を測定ａｘ
し、その結果をＢ含有量との対比で第２表に示した。The iHc, Br, (BH) of the R-Fe-B permanent magnet according to the present invention thus obtained was measured, and the results are shown in Table 2 in comparison with the B content.
第 ２ 表
第２表から明らかなように、Ｂ含釘量が１０ａ １９６
未満ではｉＨｃ、Ｂｒ、（ＢＨ） が小さａＸ
くなり、Ｂ含釘量が３０ａｒ％を超えるとＢ「が小さく
なる。Table 2 As is clear from Table 2, the amount of B nails included is 10a 196
If the content of B nails exceeds 30ar%, iHc, Br, (BH) will become small, and if the B nail content exceeds 30ar%, B' will become small.
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、Ｗを０〜１９ａｔ％の範囲内で第３表に示すよ
うに種々変化させ、Ｎｄ：４ａｔ％。Example 3 The following first step (pre-process) and second step (heat treatment step)
After that, W was varied in the range of 0 to 19 at% as shown in Table 3, and Nd: 4 at%.
Ｂ：２０ａｔ％、Ｆｅ：残部の組成を有する本発明に係
るＲ−Ｆｅ−Ｂ系永久磁石を調製した。An R-Fe-B permanent magnet according to the present invention having a composition of B: 20 at% and Fe: the balance was prepared.
第１工程（前工程） 実施例１に同じ。1st process (pre-process) Same as Example 1.
第２工程（熱処理工程） 実施例１に同じ。2nd process (heat treatment process) Same as Example 1.
このようにした得た本発明に係るＲ−Ｆｅ−Ｂ系永久磁
石のｉ Ｈｃ、Ｂ ｒ、（ＢＨ） を測定麿ａｘ
し、その結果をＷ含有量との対比で第３表に示した。The iHc, Br, (BH) of the thus obtained R-Fe-B permanent magnet according to the present invention was measured, and the results are shown in Table 3 in comparison with the W content. .
第３表
第３表から明らかなように、Ｗ含有量がｌａｔ％未満で
はｉＨｃ、Ｂｒ、（ＢＨ） が小さくなａｘ
す、Ｗ含有量が１８ａｔ％を超えると、Ｂｒ。Table 3 As is clear from Table 3, when the W content is less than lat%, iHc, Br, and (BH) are small, and when the W content exceeds 18 at%, Br.
（ＢＨ） が小さくなる。(BH) becomes smaller.
■ａｘ
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、Ｎｄを２〜４ａｔ％の範囲内、Ｃｅを０〜２ａ
ｔ％の範囲内で、それぞれ第４表に示すように種々変化
させ（但し、Ｎｄ＋Ｃｅ−４ａｔ％とした）、Ｂ：２Ｃ
）ａｔ％、Ｗ：５ａｔ％、Ｆｅ：残部の組成を有する本
発明に係るＲ−Ｆｅ−Ｂ系永久磁石を調製した。■ax Example 4 The following first step (pre-process) and second step (heat treatment step)
After that, Nd was added in the range of 2 to 4 at% and Ce was added in the range of 0 to 2 at%.
Within the range of t%, various changes were made as shown in Table 4 (however, Nd+Ce-4at%), B: 2C
) at%, W: 5 at%, and Fe: the balance. An R-Fe-B permanent magnet according to the present invention was prepared.
第１工程（前工程） 実施例１に同じ。1st process (pre-process) Same as Example 1.
第２玉程（熱処理工程） 実施例１に同し。Second ball stage (heat treatment process) Same as Example 1.
このようにした得た本発明に係るＲ−Ｆｅ−Ｂ系永久磁
石のｉＨｃ、Ｂｒ、（ＢＨ） をｓｊ定■ａＸ
し、その結果をＣｅ含有量との対比で第４表に示した（
なお、同表中のＮｄ含有量は、上記の式Ｎｄ＋Ｃｅ−４
ａｔ％を満足する量である）。The iHc, Br, (BH) of the R-Fe-B permanent magnet according to the present invention thus obtained were determined by sj, and the results are shown in Table 4 in comparison with the Ce content (
In addition, the Nd content in the same table is calculated from the above formula Nd+Ce-4
(at%).
第 ４ 表
第４表から明らかなように、ＮｄのＣｅ置換量に応して
磁気特性が変化するか、実用上充分な磁気特性が得られ
る二とが判る。このことは、Ｎｄ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。Table 4 As is clear from Table 4, it can be seen that either the magnetic properties change depending on the amount of Ce substituted for Nd, or that magnetic properties sufficient for practical use can be obtained. This means that R other than Nd (including Y)
This clearly indicates that it is valid even if
実施例５
Ｔとして第５表に示すものを使用し、下記の第１工程（
前工程）及び第２工程（熱処理工程）を経て、Ｎ ｄ
： ４ａｔ９６． Ｂ ： ２０ａｔ％、Ｔ：５ａｔ
％Ｆｅ：残部の組成を資する本発明に係るＲ−Ｆｅ−Ｂ
系永久磁石を調製した。Example 5 Using the T shown in Table 5, the following first step (
After the previous step) and the second step (heat treatment step), N d
: 4at96. B: 20at%, T: 5at%
%Fe: R-Fe-B according to the present invention contributing to the remaining composition
A permanent magnet was prepared.
第１工程（前工程） 実施例１に同し。1st process (pre-process) Same as Example 1.
第２工程（熱処理工程） 実施例１に同し。2nd process (heat treatment process) Same as Example 1.
このようにして得た本発明に係るＲ−Ｆｅ−Ｂ系永久磁
石のｌＨｃ 、Ｂｒ 、（ＢＨ） ｗ ａ ｘをＭ］定
し、その結果をＴの種類との対比で第５表に示した。The lHc, Br, (BH) w ax of the R-Fe-B permanent magnet according to the present invention thus obtained were determined, and the results are shown in Table 5 in comparison with the type of T. Ta.
第５表から明らかなように、Ｔの種類か変わると磁気特
性も変化するか、いずれの種類のＴてあっても実用上充
分な磁気特性が得られることか判る。As is clear from Table 5, it can be seen that the magnetic properties change as the type of T changes, and that practically sufficient magnetic properties can be obtained regardless of the type of T.
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、Ｎｄ：４ａｔ％、Ｂ：２０ａｔ％。Example 6 The following first step (pre-process) and second step (heat treatment step)
Nd: 4 at%, B: 20 at%.
Ｗ：５ａｔ％、Ｆｅ：残部の組成を有する本発明に係る
Ｒ−Ｆｅ−Ｂ系永久磁石を調製した。An R-Fe-B permanent magnet according to the present invention having a composition of W: 5 at% and Fe: the balance was prepared.
第１工程（前工程）
必要とする合金をアーク炉で溶解し、液体急冷装置（片
ロール法）で周速度を１０〜４０ｍ／ｓの範囲内で第６
表に示すように種々変化させて合金を急冷した。First step (pre-process) The required alloy is melted in an arc furnace, and the sixth
The alloy was quenched with various changes as shown in the table.
第２工程（熱処理工程） 実施例１と同し。2nd process (heat treatment process) Same as Example 1.
このようにした得た本発明に係るＲ−Ｆｅ−Ｂ系永久磁
石のｉＨｃ、Ｂ ｒ、（ＢＨ） を測定＋ｍａｘ
し、その結果を急冷時の周速度との対比で第６表に示し
た。The iHc, Br, (BH) of the R-Fe-B permanent magnet according to the present invention thus obtained was measured +max, and the results are shown in Table 6 in comparison with the circumferential speed during rapid cooling. .
弔
表
第６表から明らかなように、周速度の変化に応じて磁気
特性か変化するか、いずれの周速度でも実用上充分な磁
気特性が得られることが判る。As is clear from Table 6, it can be seen that the magnetic properties change as the circumferential speed changes, or that practically sufficient magnetic properties can be obtained at any circumferential speed.
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、Ｎｄ：４ａｔ％、Ｂ：２０ａｔ％。Example 7 The following first step (pre-process) and second step (heat treatment step)
Nd: 4 at%, B: 20 at%.
Ｗ：５ａｔ％、Ｆｅ：残部の組成を有する本発明に係る
Ｒ−Ｆｅ−Ｂ系永久磁石を調製した。An R-Fe-B permanent magnet according to the present invention having a composition of W: 5 at% and Fe: the balance was prepared.
第１工程（前工程） 実施例１に同じ。1st process (pre-process) Same as Example 1.
第２工程（熱処理工程）
第１工程で得た急冷体を４００〜１０００℃の範囲内で
第７表に示すように種々変化させ、１時間の熱処理を行
った。Second step (heat treatment step) The quenched body obtained in the first step was heat-treated for 1 hour at various temperatures within the range of 400 to 1000° C. as shown in Table 7.
このようにした得た本発明に係るＲ−Ｆｅ系永久磁石の
ｉ Ｈｃ、Ｂ ｒ、（ＢＨ） をａ１定■ａｘ
し、その結果を熱処理温度との対比で第７表に示した。The iHc, Br, (BH) of the R-Fe permanent magnet according to the present invention obtained in this manner was determined by a1 constant (ax), and the results are shown in Table 7 in comparison with the heat treatment temperature.
なお、同表には、 あわせて示した。In addition, in the same table, Also shown.
熱処理工程前の磁気特性をも
第７表から明らかなように、熱処理温度が５００℃未満
ては熱処理の効果かなく、熱処理温度か９００℃を超え
るとｔ Ｈｃ、 Ｂ ｒ、 （ＢＨ） ｗａｘか小
さくなる。As is clear from Table 7 regarding the magnetic properties before the heat treatment process, if the heat treatment temperature is less than 500°C, the heat treatment has no effect, and if the heat treatment temperature exceeds 900°C, t Hc, Br, (BH) wax, etc. becomes smaller.
（発明の効果）
以上詳述したように、本発明に係るＲ−Ｆｅ−Ｂ系永久
磁石によれば、Ｒ含有量を前述の先提案のものに比して
大幅に少なくても、ＲとＴの相乗効果により、高ｉＨｃ
を確保することができる。(Effects of the Invention) As detailed above, according to the R-Fe-B permanent magnet according to the present invention, even if the R content is significantly lower than that of the previous proposal, Due to the synergistic effect of T, high iHc
can be ensured.
この結果、Ｒが２〜６ａｔ％という少ない領域でも高ｉ
Ｈｃの永久磁石を得ることができる。As a result, even in a low R range of 2 to 6 at%, high i
A permanent magnet of Hc can be obtained.
そして、Ｒの含有量か前述の先提案のものより少ないた
め、原料コストの大幅な低減を図ることかできる。Furthermore, since the R content is lower than that of the previous proposal, the cost of raw materials can be significantly reduced.
Claims (1)
１種または２種以上）、１０〜３０ａｔ％のＢ、１〜１
８ａｔ％のＴ（ＴはＷ，Ｔａ，Ｎｂ，Ｍｏ，Ｔｉ，Ｚｒ
，Ｈｆ，Ｖ，Ｃｒ．Ｍｎ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永久磁石。2 to 6 at% R (however, R is one or more rare earth elements including Y), 10 to 30 at% B, 1 to 1
8 at% T (T is W, Ta, Nb, Mo, Ti, Zr
, Hf, V, Cr. A permanent magnet characterized by comprising one or more types of Mn), and the balance being Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2215922A JP2598558B2 (en) | 1990-08-17 | 1990-08-17 | permanent magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2215922A JP2598558B2 (en) | 1990-08-17 | 1990-08-17 | permanent magnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0498802A true JPH0498802A (en) | 1992-03-31 |
| JP2598558B2 JP2598558B2 (en) | 1997-04-09 |
Family
ID=16680486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2215922A Expired - Lifetime JP2598558B2 (en) | 1990-08-17 | 1990-08-17 | permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2598558B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0657899A1 (en) * | 1993-12-10 | 1995-06-14 | Sumitomo Special Metals Company Limited | Iron-based permanent magnet alloy powders for resin bonded magnets and magnets made therefrom |
| US6004407A (en) * | 1995-09-22 | 1999-12-21 | Alps Electric Co., Ltd. | Hard magnetic materials and method of producing the same |
| JP2007524986A (en) * | 2003-02-06 | 2007-08-30 | マグネクエンチ，インコーポレーテッド | Highly quenchable Fe-based rare earth material to replace ferrite |
| US7507302B2 (en) | 2001-07-31 | 2009-03-24 | Hitachi Metals, Ltd. | Method for producing nanocomposite magnet using atomizing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6362842A (en) * | 1986-09-04 | 1988-03-19 | Tdk Corp | Permanent magnet material containing rare earth element |
| JPS63111602A (en) * | 1986-10-30 | 1988-05-16 | Tdk Corp | High performance rare earth cast magnet |
| JPS63190138A (en) * | 1986-09-29 | 1988-08-05 | Tdk Corp | Rare-earth permanent magnet material |
| JPS64703A (en) * | 1986-04-15 | 1989-01-05 | Tdk Corp | Permanent magnet and manufacture thereof |
-
1990
- 1990-08-17 JP JP2215922A patent/JP2598558B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS64703A (en) * | 1986-04-15 | 1989-01-05 | Tdk Corp | Permanent magnet and manufacture thereof |
| JPS6362842A (en) * | 1986-09-04 | 1988-03-19 | Tdk Corp | Permanent magnet material containing rare earth element |
| JPS63190138A (en) * | 1986-09-29 | 1988-08-05 | Tdk Corp | Rare-earth permanent magnet material |
| JPS63111602A (en) * | 1986-10-30 | 1988-05-16 | Tdk Corp | High performance rare earth cast magnet |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0657899A1 (en) * | 1993-12-10 | 1995-06-14 | Sumitomo Special Metals Company Limited | Iron-based permanent magnet alloy powders for resin bonded magnets and magnets made therefrom |
| US6004407A (en) * | 1995-09-22 | 1999-12-21 | Alps Electric Co., Ltd. | Hard magnetic materials and method of producing the same |
| US7507302B2 (en) | 2001-07-31 | 2009-03-24 | Hitachi Metals, Ltd. | Method for producing nanocomposite magnet using atomizing method |
| JP2007524986A (en) * | 2003-02-06 | 2007-08-30 | マグネクエンチ，インコーポレーテッド | Highly quenchable Fe-based rare earth material to replace ferrite |
| JP4755080B2 (en) * | 2003-02-06 | 2011-08-24 | マグネクエンチ，インコーポレーテッド | Highly quenchable Fe-based rare earth material to replace ferrite |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2598558B2 (en) | 1997-04-09 |
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