JPS6181605A - Preparation of rare earth magnet - Google Patents
Preparation of rare earth magnetInfo
- Publication number
- JPS6181605A JPS6181605A JP59183759A JP18375984A JPS6181605A JP S6181605 A JPS6181605 A JP S6181605A JP 59183759 A JP59183759 A JP 59183759A JP 18375984 A JP18375984 A JP 18375984A JP S6181605 A JPS6181605 A JP S6181605A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- alloy
- rare earth
- magnetic
- sintering
- 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
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
- H01F1/0575—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 pressed, sintered or bonded together
- H01F1/0577—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 pressed, sintered or bonded together sintered
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Powder Metallurgy (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Ｎｄ２Ｆｅ１４Ｂ系合金磁石で代表される希土
類金属（Ｒ）と遷移金属（Ｔ）とからなるＲ２Ｔ、４Ｂ
系金属間化合物磁石の製造方法、特にＮｄ、Ｆｅ、Ｂを
主成分とする永久磁石の粉末冶金法よる製造方法に関す
る。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to R2T and 4B made of rare earth metals (R) and transition metals (T) represented by Nd2Fe14B alloy magnets.
The present invention relates to a method for manufacturing intermetallic compound magnets, particularly a method for manufacturing permanent magnets containing Nd, Fe, and B as main components by powder metallurgy.
一般にＲ，Ｆｅ、Ｂ 系磁石の製造方法については２つ
の方法に大別される。ひとつば１容解しているＲ、Ｆｅ
、Ｂ系合金を急冷した後９時効して粉砕した磁石粉末を
磁場中で配向して製造する方法であシ。In general, methods for producing R, Fe, and B magnets can be roughly divided into two methods. R, Fe that understands one word
, a method of manufacturing by quenching a B-based alloy, aging it for 9 hours, and then pulverizing the magnetic powder and orienting it in a magnetic field.
これによって所謂高分子複合型磁石が得られる。In this way, a so-called polymer composite magnet is obtained.
一方はＲ，Ｆｅ、Ｂ系磁石合金を溶解してインコ゛７ト
を作シ、このインゴットを微粉砕した後、磁場中で成形
し、焼結して製造する方法であシ、これによって焼結型
磁石が得られる。なお、粉末冶金法によって製造される
Ｒ、Ｆｅ、Ｂ系の焼結磁石に関しては特開昭５９−４６
００８に記載されている。One method involves melting R, Fe, and B-based magnetic alloys to produce ingots, pulverizing the ingots, shaping them in a magnetic field, and sintering them. A type magnet is obtained. Regarding R, Fe, and B-based sintered magnets manufactured by powder metallurgy, Japanese Patent Application Laid-Open No. 59-46
008.
Ｒ，Ｆｅ、Ｂ系磁石の粉末冶金法による製造工程は溶解
、粉砕、磁場中配向、圧縮成形、焼結２時効の順に進め
られる。Ｒ，Ｆｅ、Ｂ系磁石合金の溶解は真空あるいは
不活性雰囲気中で、アーク又は高周波加熱によって行わ
れる。粉砕は粗粉砕と微粉砕に分けられ、粗粉砕はソヨ
ークラ、／ヤー、鉄乳鉢やロールミル等で行われる。微
粉砕はボールミル。The manufacturing process of R, Fe, and B magnets using powder metallurgy is performed in the following order: melting, pulverization, orientation in a magnetic field, compression molding, sintering, and aging. The R, Fe, B based magnetic alloy is melted in vacuum or in an inert atmosphere by arc or high frequency heating. Grinding is divided into coarse grinding and fine grinding, and coarse grinding is carried out in a Soyokura, /Year, iron mortar, roll mill, etc. Fine grinding is done using a ball mill.
振動ミル、ノエ、トミル等で行われる。磁場中配向及び
圧縮成形は金型を用いて磁場中で同時に行われる。焼結
は不活性雰囲気中で、温度１０００〜１１５０℃の範囲
で行われる。また時効は必要に応じて温度３００〜９０
０℃程度の温度で行われる。This is done using a vibrating mill, Noe, Tomil, etc. Orientation in a magnetic field and compression molding are performed simultaneously in a magnetic field using a mold. Sintering is carried out in an inert atmosphere at a temperature in the range of 1000-1150°C. In addition, aging is performed at a temperature of 300 to 90°C as necessary.
It is carried out at a temperature of about 0°C.
一般に焼結型磁石では焼結温度を低下させる方結注の低
下、磁気特性の低下及びバラツキを生ずる原因となる。In general, in sintered magnets, lowering the sintering temperature causes a decrease in sintering strength, a decrease in magnetic properties, and variations in magnetic properties.
従来、焼結型磁石の特性向上のだめ前述のように、焼結
はヘリウム、アルゴンなどの不活性雰囲気中で行われ、
さらに不純ガスの影響を軽減するために、粉末成形体の
外部にケ゛ツタ−を設置して焼結する場合もあるが、
Ｒ，Ｆｅ、Ｂ系合金においては磁石特性上の顕著な効果
をもたらすに至っていない。Conventionally, in order to improve the characteristics of sintered magnets, sintering is performed in an inert atmosphere such as helium or argon, as mentioned above.
Furthermore, in order to reduce the influence of impure gases, sintering is sometimes carried out with a starter installed outside the powder compact.
R, Fe, and B-based alloys have not brought about significant effects on magnetic properties.
本発明の目的はＲ，Ｆｅ、Ｂ系磁石合金を用いて、磁石
特性上の顕著な効果をもたらす希土類磁石を製造するこ
とのできる希土類磁石の製造方法を提供することである
。An object of the present invention is to provide a method for manufacturing a rare earth magnet that can produce a rare earth magnet that provides remarkable effects on magnetic properties using an R, Fe, and B-based magnet alloy.
作用の大きいＬａ、ＦｅｒＢ系合金の微粉末を混合して
成形した後この成形体を焼結する。After mixing and molding fine powders of La and FerB alloys, which have a large effect, this molded body is sintered.
な
化学的に活性で低融点ｇ Ｌａ 、Ｆｅ 、 Ｂ系合金
微粉末がＮｄ、Ｆｅ、Ｂ系合金微粉末中に分散された成
形体中磁石特性の高い焼結体となる。The chemically active, low melting point g La, Fe, B based alloy fine powder is dispersed in the Nd, Fe, B based alloy fine powder, resulting in a sintered body with high magnetic properties.
（ｉ）実施例１
高純度のＮｄ ＋ Ｌａ 、Ｆ ｅ ｔ Ｂを使用して
、アルコ″／雰囲気中において高周波加熱によってｌＮ
ｄ １５．５Ｆ８７８Ｂ６．５及合金及びＬａ合金をそ
れぞれ粗粉砕して、 Ｌａ合金粉末をＮｄ合金粉末に対
して ５重量パーセント混合した後、ピールミルを用い
て平均粒径３μｍに湿式粉砕した。次にこの微粉末を１
０ＫＯｅの磁界中において１ ｔｏｎ／ｃｒｎＺの圧力
で成形した。さらにとの圧粉体を温度１０６０℃で１時
間真空中で加熱し１次に同じ温度で１時間アルコゞンガ
ス雰囲気中に保持した。その後ｌＯＯ℃／時間以下の冷
却速度で除冷した。(i) Example 1 Using high-purity Nd + La and F et B, 1N
The d15.5F878B6.5 alloy and the La alloy were each coarsely ground, the La alloy powder was mixed with 5 weight percent of the Nd alloy powder, and then wet ground to an average particle size of 3 μm using a peel mill. Next, add 1 of this fine powder
Molding was performed at a pressure of 1 ton/crnZ in a magnetic field of 0 KOe. Further, the green compact was heated in vacuum at a temperature of 1060° C. for 1 hour, and then held in an alco gas atmosphere at the same temperature for 1 hour. Thereafter, it was slowly cooled at a cooling rate of 100° C./hour or less.
石の特性を表に示す。The properties of the stone are shown in the table.
表
以下宗日
上記の表から明らかな通シ、 Ｌａ合金粉末を５重量・
セーセント混合することによって焼結温度が低下し、さ
らに上述のようにして製造された希土類磁石は高い磁石
特性を示している。From the table below, it is clear that from the table above, 5 weights of La alloy powder
By mixing sescent, the sintering temperature is lowered, and the rare earth magnet produced as described above exhibits high magnetic properties.
（１１）実施例２
実施例１において製造したＮｄ 、５゜５Ｆｅ７８ Ｂ
６．５及びＬａ１５．５Ｆ８７８Ｂ６．５の組成比を有
するＲ２Ｆｅ １４Ｂを主生成相とするインゴットをそ
れぞれ粗粉砕して、 Ｎｄ合金粉末及びＬａ合金粉末を
得た。Ｎｄ合金粉末に対してＬａ合金粉末を０−１１重
量パーセントまで混合して、ボールミルを用いて平均粒
径的３μｍに粉砕した。これら混合粉末を１０ ＫＯｅ
の磁界中においてｌ ｔｏｎ／ｍ”の圧力で成形し、こ
れら圧粉体を温度１０８０℃で１時間真空中で加熱し、
さらに同じ温度で３時間アルゴンガス雰囲気中に保持し
た。(11) Example 2 Nd produced in Example 1, 5°5Fe78 B
Ingots containing R2Fe14B as the main phase with composition ratios of 6.5 and La15.5F878B6.5 were respectively coarsely ground to obtain Nd alloy powder and La alloy powder. La alloy powder was mixed with Nd alloy powder to a concentration of 0 to 11% by weight, and the mixture was ground to an average particle diameter of 3 μm using a ball mill. 10 KOe of these mixed powders
The powder compacts were heated in a vacuum at a temperature of 1080°C for 1 hour, and
Further, it was kept in an argon gas atmosphere at the same temperature for 3 hours.
その後１００℃／時間以下の冷却速度で除冷した。Thereafter, it was gradually cooled at a cooling rate of 100° C./hour or less.
このようにして得られた試料を温度５５０℃に１時間保
持した後、急冷した。上述のようにして得られたＬａ合
金粉末を０〜→重量・ぞ−セント含む希土類磁石の特性
を調べたところ第１図（ａ）〜（ｃ）に示す結果が得ら
れた。第１図（ａン〜（ｃ）に示すようにＬａ ｊｓ、
ｓＦｅ ７８Ｂ６．５の混合分が０−１０重ｉｆｌ’％
（Ｏを含まず）の間で希土類磁石の特性の向上が認めら
れる。The sample thus obtained was held at a temperature of 550° C. for 1 hour and then rapidly cooled. The characteristics of rare earth magnets containing 0 to 100% of the La alloy powder obtained as described above were investigated, and the results shown in FIGS. 1(a) to 1(c) were obtained. As shown in FIG. 1 (a to (c)),
Mixed content of sFe 78B6.5 is 0-10% ifl'%
(not including O), improvement in the characteristics of rare earth magnets is observed.
このように、Ｎｄ２Ｆ６１４Ｂ系磁石の粉末冶金法によ
る製造において、 Ｎｄ・Ｆｅ−Ｂ系合金粉末にＬａ−
Ｆｅ−Ｂ系合金粉末を混合分散させた成形体を焼結する
ことは著しい磁石特性の増加を実現させることができる
。In this way, in the production of Nd2F614B magnets using the powder metallurgy method, La-
By sintering a molded body in which Fe-B alloy powder is mixed and dispersed, it is possible to realize a remarkable increase in magnetic properties.
本発明を以上詳しく説明したが、 Ｎｄ−Ｆｅ−Ｂを主
成分とするＮｄ２Ｆｅ ＋ ４Ｂ系磁石合金を粉末冶金
法によって製造する方法において、 ＮｃｌＦｅ−Ｂ系
合金粉末に対し＋ Ｌａ２Ｆｅ１４Ｂを主生成相とする
Ｌａ−ＦｅＢ系磁石合金粉末をＯ〜１０’ｆｆｉ量％（
０を含まず）混合した成形体を焼結する方法によシ著し
く使れた磁石材料が得られる。The present invention has been described in detail above, but in a method for producing a Nd2Fe + 4B magnetic alloy containing Nd-Fe-B as a main component by a powder metallurgy method, +La2Fe14B is used as the main production phase for the NclFe-B alloy powder. The amount of La-FeB magnet alloy powder is O~10'ffi (
By the method of sintering a mixed molded body (not containing 0), a highly usable magnetic material can be obtained.
Ｎ、（
第１図（ａ）乃至（ｃ）はそれぞれ−１５，５Ｆ ８７
８ Ｂ ６．５の組成をＬａ１５．５Ｆ８７８Ｂ６．５
の組成合金粉末の混合比と最大エネルギー積、残留磁束
密度及び保磁力との関係で示した図である。N, (Figures 1(a) to (c) are -15 and 5F respectively 87
8 B 6.5 composition La15.5F878B6.5
FIG. 2 is a diagram showing the relationship between the mixing ratio of the alloy powder and the maximum energy product, residual magnetic flux density, and coercive force.
Claims (1)
４Ｂ系磁石合金を粉末冶金法によって製造する方法にお
いて、Ｎｄ、Ｆｅ、Ｂ系磁石合金粉末に対してＬａ＿２
Ｆｅ＿１＿４Ｂを主生成相とするＬａ、Ｆｅ、Ｂ系磁石
合金粉末を０乃至１０重量パーセント（０を含まず）混
合した成形体を焼結することを特徴とする希土類磁石の
製造方法。1 Nd_2Fe_1_ whose main components are Nd, Fe, and B
In a method for manufacturing a 4B magnet alloy by powder metallurgy, La_2 is added to Nd, Fe, and B magnet alloy powder.
A method for producing a rare earth magnet, which comprises sintering a molded body in which 0 to 10 weight percent (excluding 0) of La, Fe, and B-based magnet alloy powder containing Fe_1_4B as the main phase is sintered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59183759A JPS6181605A (en) | 1984-09-04 | 1984-09-04 | Preparation of rare earth magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59183759A JPS6181605A (en) | 1984-09-04 | 1984-09-04 | Preparation of rare earth magnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6181605A true JPS6181605A (en) | 1986-04-25 |
| JPH0345884B2 JPH0345884B2 (en) | 1991-07-12 |
Family
ID=16141476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59183759A Granted JPS6181605A (en) | 1984-09-04 | 1984-09-04 | Preparation of rare earth magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6181605A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6187825A (en) * | 1984-10-05 | 1986-05-06 | Hitachi Metals Ltd | Manufacture of permanent magnet material |
| JPS6231102A (en) * | 1985-08-01 | 1987-02-10 | Hitachi Metals Ltd | Sintered permanent magnet |
| US4981513A (en) * | 1987-05-11 | 1991-01-01 | Union Oil Company Of California | Mixed particulate composition for preparing rare earth-iron-boron sintered magnets |
| US5015304A (en) * | 1987-05-11 | 1991-05-14 | Union Oil Company Of California | Rare earth-iron-boron sintered magnets |
| US5015306A (en) * | 1987-05-11 | 1991-05-14 | Union Oil Company Of California | Method for preparing rare earth-iron-boron sintered magnets |
| US5443617A (en) * | 1993-10-06 | 1995-08-22 | Kawasaki Teitoku Co., Ltd. | Powdery raw material composition for a permanent magnet |
| CN103714939A (en) * | 2013-12-13 | 2014-04-09 | 钢铁研究总院 | La-Fe-based magnet with double hard-magnetic main phases and preparation method for same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59132104A (en) * | 1983-01-19 | 1984-07-30 | Sumitomo Special Metals Co Ltd | Permanent magnet |
-
1984
- 1984-09-04 JP JP59183759A patent/JPS6181605A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59132104A (en) * | 1983-01-19 | 1984-07-30 | Sumitomo Special Metals Co Ltd | Permanent magnet |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6187825A (en) * | 1984-10-05 | 1986-05-06 | Hitachi Metals Ltd | Manufacture of permanent magnet material |
| JPH0216368B2 (en) * | 1984-10-05 | 1990-04-17 | Hitachi Metals Ltd | |
| JPS6231102A (en) * | 1985-08-01 | 1987-02-10 | Hitachi Metals Ltd | Sintered permanent magnet |
| JPH0453083B2 (en) * | 1985-08-01 | 1992-08-25 | Hitachi Metals Ltd | |
| US4981513A (en) * | 1987-05-11 | 1991-01-01 | Union Oil Company Of California | Mixed particulate composition for preparing rare earth-iron-boron sintered magnets |
| US5015304A (en) * | 1987-05-11 | 1991-05-14 | Union Oil Company Of California | Rare earth-iron-boron sintered magnets |
| US5015306A (en) * | 1987-05-11 | 1991-05-14 | Union Oil Company Of California | Method for preparing rare earth-iron-boron sintered magnets |
| US5443617A (en) * | 1993-10-06 | 1995-08-22 | Kawasaki Teitoku Co., Ltd. | Powdery raw material composition for a permanent magnet |
| US5562782A (en) * | 1993-10-06 | 1996-10-08 | Kawasaki Teitoku Co., Ltd. | Method for producing magnetically anisotropic permanent magnet |
| US5580400A (en) * | 1993-10-06 | 1996-12-03 | Kawasaki Teitoku Co., Ltd. | Magnetically anisotropic permanent magnet |
| CN103714939A (en) * | 2013-12-13 | 2014-04-09 | 钢铁研究总院 | La-Fe-based magnet with double hard-magnetic main phases and preparation method for same |
| CN103714939B (en) * | 2013-12-13 | 2016-05-25 | 钢铁研究总院 | Two Hard Magnetic principal phase magnets of La-Fe base and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0345884B2 (en) | 1991-07-12 |
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