JPH03198306A - Manufacture of rare earth cobalt magnet - Google Patents
Manufacture of rare earth cobalt magnetInfo
- Publication number
- JPH03198306A JPH03198306A JP1339161A JP33916189A JPH03198306A JP H03198306 A JPH03198306 A JP H03198306A JP 1339161 A JP1339161 A JP 1339161A JP 33916189 A JP33916189 A JP 33916189A JP H03198306 A JPH03198306 A JP H03198306A
- Authority
- JP
- Japan
- Prior art keywords
- cooling rate
- solution treatment
- magnetic
- rare earth
- magnet
- 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 abstract description 15
- 229910052761 rare earth metal Inorganic materials 0.000 title claims description 6
- 150000002910 rare earth metals Chemical class 0.000 title claims description 6
- 229910017052 cobalt Inorganic materials 0.000 title claims description 4
- 239000010941 cobalt Substances 0.000 title claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 title claims description 4
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 229910052772 Samarium Inorganic materials 0.000 claims abstract 2
- 229910045601 alloy Inorganic materials 0.000 claims abstract 2
- 239000000956 alloy Substances 0.000 claims abstract 2
- 238000010438 heat treatment Methods 0.000 claims abstract 2
- 239000000843 powder Substances 0.000 claims abstract 2
- 238000005245 sintering Methods 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 229910001004 magnetic alloy Inorganic materials 0.000 abstract 1
- 230000032683 aging Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 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
- H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
- H01F1/0557—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together sintered
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はＳｍとＧｏを主体とし、Ｃｏ部をＣｕ、 Ｆｅ
＋ Ｚｒで置換した５ＩＩＩＣＯ＋？系の希土類コバル
ト磁石の製造方法に関するものである。[Detailed description of the invention] [Industrial application field] The present invention mainly consists of Sm and Go, and the Co part is Cu, Fe.
+5IIICO+ substituted with Zr? The present invention relates to a method for manufacturing rare earth cobalt magnets.
ＳｍｚＣｏ、７の組成に関しては特許公報昭５５４８０
９４で公知である。その組成範囲は重量百分比で２４〜
２８％のＲ（だだし希土類金属の少なくとも一種）、５
〜１２％のＣｕ、０．２〜５％のＺｒ、５５〜７０．８
％のＣｏ、前記Ｃｏを１５％以下で置換したものである
。その製造方法はアーク溶解または高周波溶解でインゴ
ットを作成し、それを微粉砕して磁場中プレス後１１７
０〜１２５０″Ｃの温度で２時間焼結。その後１１７０
−１２３０°Ｃにし各組成に対応した溶体化処理を施し
、冷却後真空又は不活性ガス雰囲気で７５０〜９００″
Ｃの温度より４００°Ｃまで多段時効処理を行なって製
造している。Regarding the composition of SmzCo, 7, see patent publication No. 55480.
It is known as 94. Its composition range is from 24 to 24% by weight.
28% R (at least one rare earth metal), 5
~12% Cu, 0.2-5% Zr, 55-70.8
% Co, the above-mentioned Co is replaced by 15% or less. The manufacturing method is to create an ingot by arc melting or high frequency melting, then pulverize it, press it in a magnetic field, and then press it into 117mm ingots.
Sinter for 2 hours at a temperature of 0-1250″C. Then 1170″C.
-1230°C and subjected to solution treatment corresponding to each composition, and after cooling in vacuum or inert gas atmosphere 750~900''
It is manufactured by performing multi-stage aging treatment from a temperature of 400°C to 400°C.
前記の組成と製法において、溶体化処理後の冷却速度と
Ｉｎｃについて検討した結果、Ｓｎ＋２６．５ｗｔ％、
Ｃｕ１２ｗｔ％、 Ｆｅ５ｅｖｔ％、Ｚｒ１．０ｗｔ％
、 Ｃ。In the above composition and manufacturing method, as a result of examining the cooling rate and Inc after solution treatment, Sn+26.5wt%,
Cu12wt%, Fe5evt%, Zr1.0wt%
,C.
ｂａｌにおいては第１図のＡに示すような結果で冷却速
度４．５℃／ｓｅｃ以上の速い速度で冷却しないと目的
のＩＨＣが得られないことが明らかとなった。このＡ組
成において冷却速度が速い場合大型製品はクラックが発
生してしまう。また遅い場合はＩＨＣが低下してしまう
。In the case of bal, the results shown in A in FIG. 1 indicate that the desired IHC cannot be obtained unless cooling is performed at a cooling rate of 4.5° C./sec or higher. If the cooling rate is fast in this A composition, cracks will occur in large products. Moreover, if it is slow, IHC will decrease.
またＳ＋＋＋２５．５ｗｔ％、Ｃｕ４．５ｗｔ％、Ｆｅ
１４ｗｔ％。Also, S+++25.5wt%, Cu4.5wt%, Fe
14wt%.
Ｚｒ２．８ｗｔ％、残Ｃｏの組成では、図中のＢに示す
ように冷却速度０．７℃／ｓｅｃで最大値を示す結果で
あ°る。With a composition of 2.8 wt % Zr and residual Co, the maximum value was obtained at a cooling rate of 0.7° C./sec, as shown in B in the figure.
Ｂに示す組成において、冷却速度が速い場合Ａの組成と
同様な問題が発生する。In the composition shown in B, when the cooling rate is fast, the same problem as in the composition A occurs.
遅い場合は、肌がピークを示す速度が現われＩＨｃバラ
ツキが大となる。If it is slow, the skin will reach a peak speed and the IHc variation will become large.
このＡ、Ｂタイプの組成で製品を製造する場合、ｌＨｃ
特性の目標を得るのと安定した。Ｈゎを得るには冷却速
度を４．５°（／ｓｅｃと速くする必要があった。When manufacturing products with these A and B type compositions, lHc
Stable with getting the characteristic goals. In order to obtain H, it was necessary to increase the cooling rate to 4.5°/sec.
最近の希土類磁石の製造設備は生産効率向上のため大型
化し、−度に多量に処理するようになって来ている。そ
のため溶体化処理後の冷却速度は０．４〜７．５℃／ｓ
ｅｃに炉内でバラツキを生じている。このために冷却速
度に依存せずｌＨｃが安定する条件が必要となり、従っ
て、本発明の目的は冷却速度０．４℃／ｓｅｃ以上の速
度に依存せずＩＨＣ±１００００ｅを得る製造方法を提
供することである。Recently, rare earth magnet manufacturing equipment has become larger in order to improve production efficiency, and it has become possible to process large quantities at a time. Therefore, the cooling rate after solution treatment is 0.4-7.5℃/s
There are variations in ec within the furnace. For this reason, a condition is required in which IHc is stable regardless of the cooling rate.Therefore, the object of the present invention is to provide a manufacturing method that obtains IHC±10,000e without depending on the cooling rate of 0.4°C/sec or more. That's true.
本発明は８１１１２４〜２６ｗｔ％、 Ｃｕ５．Ｏ〜５
．３ｗｔ％。The present invention contains 811124 to 26 wt%, Cu5. O~5
．． 3wt%.
Ｚｒ２．９〜３．０ｗｔ％、 Ｆｅｌ ３〜１４ｗｔ％
、残Ｃｏよりなる磁石材の溶体化処理後の冷却速度０．
４〜７．５’Ｃ／ｓｅｃでＩＨＣのバラツキ範囲が±１
００００ｅが得られることを特徴とする希土類コバルト
磁石の製造方法である。第２図に溶体化処理後の冷却速
度とＣｕ量におけるＥＨｃの変化を示した。Zr2.9~3.0wt%, Fel 3~14wt%
, the cooling rate after solution treatment of the magnet material made of residual Co is 0.
IHC variation range is ±1 at 4 to 7.5'C/sec
This is a method for producing a rare earth cobalt magnet characterized by obtaining 0000e. FIG. 2 shows the change in EHc depending on the cooling rate and Cu content after solution treatment.
組成において高Ｃｕ量５．６ｉｖｔ％以上では高いＩＨ
ｃを得、かつ、■。は溶体化処理後の冷却速度に対して
も安定化方向に行く、しかしＢｒ （残留磁束密度）が
低下してしまう。低いＣｕ量５ｗｔ％未満ではＢｒは高
いが、ｌＨｃが溶体化処理後の冷却速度０、７℃／ｓｅ
ｃ近傍でＩ）ｌｃのピークが発生し、冷却速度でＩＨｃ
のバラツキが生じるため製造上問題となる。本発明の組
成Ｃｕ量５〜５．３ｗｔ％で溶体化処理後の冷却速度０
．４℃／ｓｅｃ以上の速度に依存せずＩＬ±１００００
ｅに制御できることを見出した。次に実施例をあげて本
発明を説明する。If the composition has a high Cu content of 5.6 ivt% or more, high IH
Obtain c, and ■. The cooling rate after solution treatment tends to stabilize, but Br (residual magnetic flux density) decreases. When the Cu amount is low, less than 5 wt%, Br is high, but the cooling rate after solution treatment is 0.7℃/se.
A peak of I)lc occurs near c, and IHc occurs at the cooling rate.
This causes a problem in manufacturing. The composition of the present invention has a Cu content of 5 to 5.3 wt% and a cooling rate of 0 after solution treatment.
．． IL±10000 independent of speeds over 4℃/sec
We found that it is possible to control e. Next, the present invention will be explained with reference to Examples.
５ｍ２５．２ｗｔ％、Ｃｕ５．１ｉｖｔ％、Ｐｅ１３．
８ｉ１ｔ％、 Ｚｒ２．９５ｗｔ％、残Ｃｏからなる組
成インゴットを作成し、粗粉砕、振動式ミルで微粉砕し
た。その時の粒度４．５μ、０！は２８００ｐｐｍ＋で
あった。これを磁場中プレスし、成形体を１２１０℃、
２時間Ｈ２中で焼結した。その後１１８０℃で４時間溶
体化処理を施し、冷却速度を０．４〜７．５℃／ｓｅｃ
と変化させ冷却した。その試料を一段目８００°Ｃで２
時間、二段目７９０°Ｃで６時間の２段時効を施した。5m25.2wt%, Cu5.1ivt%, Pe13.
An ingot having a composition of 8i1t%, Zr2.95wt%, and residual Co was prepared, and was coarsely ground and then finely ground with a vibrating mill. The particle size at that time was 4.5μ, 0! was 2800 ppm+. This was pressed in a magnetic field to form a molded body at 1210°C.
Sintered in H2 for 2 hours. After that, solution treatment was performed at 1180℃ for 4 hours, and the cooling rate was set at 0.4 to 7.5℃/sec.
and cooled. The sample was heated to 800°C in the first stage for 2
Two-stage aging was performed at 790°C for 6 hours in the second stage.
磁気特性の評価結果を第１図中のＣのカーブで示した。The evaluation results of the magnetic properties are shown by curve C in FIG.
ＩＨＣバラツキが１１０００±１００００ｅが得られた
。An IHC variation of 11000±10000e was obtained.
本発明によれば溶体化処理後の冷却速度０．４℃／ｓｅ
ｃ以上の速度に依存せず、ＩＩ（ｃが±１００００８の
バラツキに入り、生産製造中の磁気特性の安定化が達成
できる。According to the present invention, the cooling rate after solution treatment is 0.4°C/se.
It does not depend on speeds higher than c, and II (c has a variation of ±100008), and stabilization of magnetic properties during production can be achieved.
第１図は溶体化処理後の冷却速度と磁気特性の関係を示
す（Ａは公知組成と製法、ＢはＣｕ量を４．４ｗｔ％の
場合、Ｃは本発明の組成範囲の場合）図、
第２図は溶体化処理後の冷却速度とＣｕ量変化と１■。
について示す図である。Figure 1 shows the relationship between the cooling rate and magnetic properties after solution treatment (A is a known composition and manufacturing method, B is a case where the Cu amount is 4.4 wt%, and C is a case where the composition range of the present invention is used). Figure 2 shows the cooling rate and change in Cu amount after solution treatment. FIG.
Claims (1)
．８〜３．０％Ｚｒ，１３〜１５％Ｆｅ，Ｏ＿２２００
０〜３０００ｐｐｍ，残Ｃｏの組成範囲を有する磁石合
金粉を磁場中成形、焼結後熱処理工程の溶体化処理完了
後の冷却速度０．４℃／ｓｅｃ以上の冷却速度に依存せ
ず、磁気特性＿ＩＨ＿ｃバラツキ範囲±１００００ｅで
製造することを特徴とする希土類コバルト磁石の製造方
法。Weight percentage: 24-26% Sm, 5-5.3% Cu, 2
．． 8-3.0% Zr, 13-15% Fe, O_2200
Magnet alloy powder having a composition range of 0 to 3000 ppm and residual Co is formed in a magnetic field, and the cooling rate after completion of the solution treatment in the post-sintering heat treatment process is 0.4°C/sec or more, and the magnetic properties are independent of the cooling rate. A method for producing a rare earth cobalt magnet, characterized in that it is produced within a _IH_c variation range of ±10,000e.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1339161A JPH03198306A (en) | 1989-12-27 | 1989-12-27 | Manufacture of rare earth cobalt magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1339161A JPH03198306A (en) | 1989-12-27 | 1989-12-27 | Manufacture of rare earth cobalt magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03198306A true JPH03198306A (en) | 1991-08-29 |
Family
ID=18324820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1339161A Pending JPH03198306A (en) | 1989-12-27 | 1989-12-27 | Manufacture of rare earth cobalt magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03198306A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5482573A (en) * | 1991-10-16 | 1996-01-09 | Kabushiki Kaisha Toshiba | Magnetic material |
| EP1187147A3 (en) * | 2000-09-08 | 2003-10-01 | Shin-Etsu Chemical Co., Ltd. | Rare-earth alloy, rare-earth sintered magnet, and methods of manufacturing |
| WO2015037037A1 (en) * | 2013-09-13 | 2015-03-19 | 株式会社 東芝 | Permanent magnet,as well as motor and electrical power generator using same |
-
1989
- 1989-12-27 JP JP1339161A patent/JPH03198306A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5482573A (en) * | 1991-10-16 | 1996-01-09 | Kabushiki Kaisha Toshiba | Magnetic material |
| EP1187147A3 (en) * | 2000-09-08 | 2003-10-01 | Shin-Etsu Chemical Co., Ltd. | Rare-earth alloy, rare-earth sintered magnet, and methods of manufacturing |
| EP1626418A3 (en) * | 2000-09-08 | 2007-11-07 | Shin-Etsu Chemical Co., Ltd. | Rare-earth alloy, rare-earth sintered magnet, and methods of manufacturing |
| WO2015037037A1 (en) * | 2013-09-13 | 2015-03-19 | 株式会社 東芝 | Permanent magnet,as well as motor and electrical power generator using same |
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