JPS646267B2 - - Google Patents
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- Publication number
- JPS646267B2 JPS646267B2 JP55104793A JP10479380A JPS646267B2 JP S646267 B2 JPS646267 B2 JP S646267B2 JP 55104793 A JP55104793 A JP 55104793A JP 10479380 A JP10479380 A JP 10479380A JP S646267 B2 JPS646267 B2 JP S646267B2
- Authority
- JP
- Japan
- Prior art keywords
- aging treatment
- magnetized
- treatment
- alloy
- sample
- 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.)
- Expired
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- 230000032683 aging Effects 0.000 claims description 29
- 229910045601 alloy Inorganic materials 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 12
- 230000005415 magnetization Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- 229910052693 Europium Inorganic materials 0.000 claims description 2
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 2
- 229910052779 Neodymium Inorganic materials 0.000 claims description 2
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 2
- 229910052772 Samarium Inorganic materials 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052735 hafnium Inorganic materials 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 229910052715 tantalum Inorganic materials 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 229910052727 yttrium Inorganic materials 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 229910052692 Dysprosium Inorganic materials 0.000 claims 1
- 238000000748 compression moulding Methods 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- 229910052719 titanium Inorganic materials 0.000 claims 1
- 229910052721 tungsten Inorganic materials 0.000 claims 1
- 230000005347 demagnetization Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910052723 transition metal Inorganic materials 0.000 description 3
- 150000003624 transition metals Chemical group 0.000 description 3
- -1 T 17 compound Chemical class 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000003679 aging effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
Landscapes
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Description
【発明の詳細な説明】
本発明はＲ−Co系永久磁石合金において、
R2T17（Ｔは遷移金属）化合物を主体とする永久
磁石合金の新規な熱処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an R-Co permanent magnet alloy,
The present invention relates to a novel heat treatment method for a permanent magnetic alloy mainly composed of R 2 T 17 (T is a transition metal) compound.
本発明は一般式でＲ（Co1−ｘ−yFexMy）ｚ
（ＲはＹ、Ce、Nd、Pr、Sm、Eu、Gd、Dy、ミ
ツシユメタルの１種または２種以上、ＭはTi、
Cr、Ｖ、Mn、Ni、Cu、Zn、Zr、Nb、Hf、Ta、
Ｗの１種または２種以上から成る）の合金でｘ、
ｙ、ｚがそれぞれ0.02ｘ0.5、0.01ｙ0.3、
８ｚ９の範囲内の組成合金を微粉砕し、圧縮
成形し、焼結した後に時効処理を施す熱処理工程
において、該処理前に焼結体を着磁し、磁化され
た状態にした後、時効処理を実施することから構
成する。これによつてR2T17化合物を主体とする
合金から10KOe以上の固有保磁力（ JHc）を有
する高性能磁石を得ることができた。 The present invention has the general formula R(Co 1 −x−yFexMy)z
(R is one or more of Y, Ce, Nd, Pr, Sm, Eu, Gd, Dy, Mitsushi metal, M is Ti,
Cr, V, Mn, Ni, Cu, Zn, Zr, Nb, Hf, Ta,
an alloy consisting of one or more types of W) x,
y and z are respectively 0.02x0.5 and 0.01y0.3,
In a heat treatment process in which an alloy with a composition within the range of 8z9 is finely pulverized, compressed, molded, sintered, and then subjected to aging treatment, the sintered body is magnetized before the treatment, brought into a magnetized state, and then subjected to aging treatment. It consists of implementing the following. As a result, we were able to obtain a high-performance magnet with an intrinsic coercive force ( J Hc) of 10 KOe or more from an alloy mainly composed of R 2 T 17 compounds.
希土類元素Ｒと、CoまたはCo、Fe及びその他
の遷移金属による金属間化合物を主体とした永久
磁石は、高性能な磁気特性を有する材料とし注目
されてきた。とくにそれらの化合物のうちRT5お
よびRT7系材料は既に工業化されている。しか
し、当初から有望視されていたR2T17化合物は高
い飽和磁化（4πJs）を保持しているにもかかわら
ず、実用上満足される JHcが得られず、その工
業化が遅れていた。 Permanent magnets mainly composed of intermetallic compounds of rare earth element R and Co or Co, Fe, and other transition metals have attracted attention as materials with high-performance magnetic properties. In particular, among these compounds, RT 5 and RT 7 materials have already been industrialized. However, although the R 2 T 17 compound, which had been viewed as promising from the beginning, has a high saturation magnetization (4πJs), it has not been possible to obtain a practically satisfactory J Hc, and its industrialization has been delayed.
本発明者は先願の特願昭54―48333号において
前述のR2T17化合物を主体とした組成合金におい
て700〜800℃の温度で0.5〜200時間の加熱時効処
理をすることにより高保磁力を実現することがで
きた。しかし、その後の調査により上記温度領域
における長時間時効処理が保磁力増大化には寄与
するが、一方において材料の配向性を乱す作用を
有し、合金の飽和磁化減少を引き起こすことか
ら、磁石特性を減ずる効果を伴なうことがわかつ
た。この現象はR2T17化合物において700〜800℃
の温度領域内が化合物の共晶温度にあたり、長時
間の時効処理中に結晶の再形成が促進される。こ
のとき相互の結晶が保有する磁気モーメントを互
いに打ち消し合う方向に成長するために4πJsの劣
化を引き起こすと考えられる。 In the earlier patent application No. 1983-48333, the present inventor developed a high coercive force by subjecting the composition alloy mainly composed of the above-mentioned R 2 T 17 compound to heat aging treatment at a temperature of 700 to 800°C for 0.5 to 200 hours. We were able to realize this. However, subsequent research revealed that while long-term aging treatment in the above temperature range contributes to increasing coercive force, it also has the effect of disturbing the orientation of the material, causing a decrease in the saturation magnetization of the alloy, which has shown that the magnetic properties It was found that this has the effect of reducing This phenomenon occurs at 700-800℃ for R 2 T 17 compounds.
The temperature range corresponds to the eutectic temperature of the compound, and crystal reformation is promoted during long-term aging treatment. At this time, it is thought that 4πJs deterioration is caused because the crystals grow in a direction in which their magnetic moments cancel each other out.
本発明は上述の時効処理中における4πJs劣化を
防止するとともに、本来の時効処理の目的である
保磁力増大化を実現する方法を提示するものであ
る。 The present invention proposes a method for preventing the 4πJs deterioration during the above-mentioned aging treatment and for realizing an increase in coercive force, which is the original purpose of the aging treatment.
本発明は時効処理中の磁化低下を防止するた
め、焼結後、または焼結後温度750〜850℃．時間
0.1〜10hの時効処理（予備時効処理）後に、焼結
体を着磁し、磁化された状態を維持できる800以
下の温度で時効処理を実施することから成る。予
備時効処理は、この処理をしない場合に比較して
第１図１，２に示されるように保磁力が４倍強大
きいために、その後の時効処理による熱減磁作用
の影響が少ないため効果的である。なお時効処理
すべき合金自体を着磁しないで外部から磁界を印
加することによつて本発明の目的とする時効処理
中における4πJs降下を防止することも可能である
が、大量生産を考慮したとき、磁界を発生させる
ための磁具等が大規模な装置となり、実用上、製
造上の有効性が少ない。一方、本発明による方法
は、時効処理前に着磁するだけで同様な効果が得
られるので熱処理炉も従来通りでよく、特別な設
備を必要としない利点もある。 In the present invention, in order to prevent a decrease in magnetization during aging treatment, the temperature after sintering or after sintering is 750 to 850°C. time
After 0.1 to 10 hours of aging treatment (preliminary aging treatment), the sintered body is magnetized, and the aging treatment is performed at a temperature of 800° C. or less at which the magnetized state can be maintained. Pre-aging treatment is effective because the coercive force is more than four times larger than that without this treatment, as shown in Figures 1 and 2, and the influence of thermal demagnetization caused by the subsequent aging treatment is small. It is true. Note that it is possible to prevent the 4πJs drop during the aging treatment, which is the object of the present invention, by applying a magnetic field from outside without magnetizing the alloy itself to be aged, but when considering mass production. , magnetic tools and the like for generating a magnetic field are large-scale devices, and are less effective in terms of practical use and manufacturing. On the other hand, the method according to the present invention has the advantage that the same effect can be obtained simply by magnetizing before the aging treatment, so the heat treatment furnace can be used as usual, and no special equipment is required.
本発明の効果が得られる組成領域は、化学量論
R2T17組成近傍において特に顕著であり、RTzの
形式でｚ＝８〜９内の合金組成に存在する。Ｔ成
分はCo、Fe、を中心に、その他若干のCo、Fe以
外の遷移金属から構成するとき、最大限に発明の
効果が得られ、それぞれの有効領域は前記のとお
りである。次に実施例に沿つて詳述する。 The compositional range in which the effects of the present invention can be obtained is stoichiometric
It is particularly noticeable in the vicinity of the R 2 T 17 composition, and exists in the alloy compositions in the range of z=8 to 9 in the form of RTz. When the T component is mainly composed of Co, Fe, and some other transition metals other than Co and Fe, the maximum effect of the invention can be obtained, and the effective areas of each are as described above. Next, a detailed description will be given along with examples.
実施例
一般式でY0.2Sm0.8（Co0.695 Fe0.20 Cu0.075
Zr0.03）8.5の組成になるように成分元素を秤量し、
アーク溶解によつてインゴツトを作成した。次に
インゴツトを粗粉砕後、振動ミルによつて平均粒
径4μmになるまで粉砕した。微粒子は次に約
10KOeの磁界中で配向し、約４／cm2の圧力で圧
縮成形し、生材とした。焼結は生材を真空排気
（10-3Torr程度）した後に1190℃、２時間の加熱
によつて実施し、室温まで炉冷した。試料の一部
は780℃、８時間の予備時効処理をした。次に未
着磁試料・同着磁（約20KOe）試料・焼結・予
備時効処理着磁（約20KOe）試料・以上３種類
の試料を同時に750℃で12時間時効処理を実施し、
磁気特性を測定したところ、第１図の減磁曲線を
得た。図中１は焼結のみの試料の特性、２は着磁
しない試料の時効処理後の特性、３は着磁試料の
時効処理後の特性（予備時効処理なし）、４は予
備時効処理後着磁し、時効処理を実施した試料の
特性である。この図より明らかに着磁時効効果が
みられ、その効果はBr降下を防止するとともに、
JHcの増加にも寄与することがわかつた。Example General formula: Y 0.2 Sm 0.8 (Co 0.695 Fe 0.20 Cu 0.075
Weigh the component elements so that the composition is Zr 0.03 ) 8.5 ,
Ingots were made by arc melting. Next, the ingot was coarsely ground and then ground using a vibration mill until the average particle size was 4 μm. The fine particles are then approximately
It was oriented in a magnetic field of 10 KOe and compression molded at a pressure of about 4/cm 2 to obtain a green material. Sintering was performed by evacuation of the green material (approximately 10 -3 Torr), heating at 1190° C. for 2 hours, and cooling in the furnace to room temperature. Some of the samples were pre-aged at 780°C for 8 hours. Next, the unmagnetized sample, the same magnetized (approximately 20 KOe) sample, the sintered/pre-aged magnetized (approximately 20 KOe) sample, and the above three types of samples were aged at 750°C for 12 hours at the same time.
When the magnetic properties were measured, the demagnetization curve shown in FIG. 1 was obtained. In the figure, 1 is the characteristic of the sample with only sintering, 2 is the characteristic after aging treatment of the non-magnetized sample, 3 is the characteristic after aging treatment of the magnetized sample (without pre-aging treatment), and 4 is the characteristic after pre-aging treatment. These are the characteristics of a sample that has been magnetized and subjected to aging treatment. This figure clearly shows the magnetization aging effect, which not only prevents Br drop, but also
It was found that it also contributed to an increase in J Hc.
以上から本発明による着磁時効処理は前記範囲
内の２―17相主体組成合金が高性能永久磁石材料
としての大きな効果を有することが判明した。 From the above, it has been found that the magnetization aging treatment according to the present invention has a great effect on a 2-17 phase mainly composed alloy within the above range as a high-performance permanent magnet material.
第１図は焼結のみ、および着磁時効処理との減
磁曲線の比較を示したものである。
１：焼結のみの試料の減磁曲線。２：未着磁試
料の時効処理後の減磁曲線。３：本発明の着磁試
料の時効処理後の減磁曲線。４：本発明の予備時
効後の着磁試料の時効処理後の減磁曲線。
FIG. 1 shows a comparison of demagnetization curves between sintering only and magnetization aging treatment. 1: Demagnetization curve of sintered only sample. 2: Demagnetization curve after aging treatment of unmagnetized sample. 3: Demagnetization curve after aging treatment of the magnetized sample of the present invention. 4: Demagnetization curve after aging treatment of the magnetized sample after preliminary aging of the present invention.
Claims (1)
Ｙ、Ce、Nd、Pr、Sm、Eu、Gd、Dy.ミツシユ
メタルの１種または２種以上、ＭはTi、Cr、Ｖ、
Mn、Ni、Cu、Zn、Zr、Nb、Hf、Ta、Ｗの１
種または２種以上から成る）の合金でｘ、ｙ、ｚ
がそれぞれ0.02ｘ0.5、0.01ｙ0.3、８
ｚ９の範囲内の組成合金を微粉砕し、圧縮成形
し、その成形体を焼結し、時効処理を施す熱処理
工程において、該処理前に焼結体を着磁し、磁化
された状態にした後、時効処理を実施することを
特徴とする永久磁石合金の製造方法。 ２ 時効処理前に、予備時効処理を行なつた後着
磁することを特徴とする特許請求の範囲第１項記
載の永久磁石合金の製造方法。[Claims] 1 In the general formula, R(Co 1 -x-yFexMy)z (R is one or more of Y, Ce, Nd, Pr, Sm, Eu, Gd, Dy. Mitsushi metal, M is Ti, Cr, V,
1 of Mn, Ni, Cu, Zn, Zr, Nb, Hf, Ta, W
x, y, z
are respectively 0.02x0.5, 0.01y0.3, 8
In the heat treatment process of finely pulverizing a composition alloy within the range of Z9, compression molding, sintering the molded body, and subjecting it to aging treatment, the sintered body was magnetized and made into a magnetized state before the treatment. A method for producing a permanent magnet alloy, the method comprising: thereafter carrying out an aging treatment. 2. The method for producing a permanent magnet alloy according to claim 1, characterized in that, before the aging treatment, magnetization is carried out after performing a preliminary aging treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10479380A JPS5729565A (en) | 1980-07-30 | 1980-07-30 | Preparation of permanent magnet alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10479380A JPS5729565A (en) | 1980-07-30 | 1980-07-30 | Preparation of permanent magnet alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5729565A JPS5729565A (en) | 1982-02-17 |
| JPS646267B2 true JPS646267B2 (en) | 1989-02-02 |
Family
ID=14390325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10479380A Granted JPS5729565A (en) | 1980-07-30 | 1980-07-30 | Preparation of permanent magnet alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5729565A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58219704A (en) * | 1982-06-16 | 1983-12-21 | Mitsubishi Metal Corp | Manufacture of permanent magnet having high coercive force and high maximum energy product |
| JPS59169108A (en) * | 1983-03-16 | 1984-09-25 | Toshiba Corp | Permanent magnet |
| CN101882494A (en) * | 2010-05-17 | 2010-11-10 | 中国科学院宁波材料技术与工程研究所 | Samarium-cobalt sintered magnet material and preparation method thereof |
| CN102071339A (en) * | 2011-01-24 | 2011-05-25 | 宁波科星材料科技有限公司 | Samarium-cobalt permanent magnet material and preparation method thereof |
| JP6970942B2 (en) * | 2018-03-05 | 2021-11-24 | 住友電工焼結合金株式会社 | Heat treatment method for iron-based molded products |
-
1980
- 1980-07-30 JP JP10479380A patent/JPS5729565A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5729565A (en) | 1982-02-17 |
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