JPS62284027A - Manufacture of rare-earth magnet - Google Patents
Manufacture of rare-earth magnetInfo
- Publication number
- JPS62284027A JPS62284027A JP9976286A JP9976286A JPS62284027A JP S62284027 A JPS62284027 A JP S62284027A JP 9976286 A JP9976286 A JP 9976286A JP 9976286 A JP9976286 A JP 9976286A JP S62284027 A JPS62284027 A JP S62284027A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- magnetic properties
- r2co17
- temperature
- hot
- 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 6
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000000843 powder Substances 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 4
- 229910052745 lead Inorganic materials 0.000 claims abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 claims abstract 2
- 229910052718 tin Inorganic materials 0.000 claims abstract 2
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 238000007731 hot pressing Methods 0.000 claims description 4
- 229910052727 yttrium Inorganic materials 0.000 claims description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract 2
- 238000005056 compaction Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 13
- 239000011230 binding agent Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910017985 Cu—Zr Inorganic materials 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 229910052789 astatine Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002431 foraging effect Effects 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 229910052726 zirconium 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
- H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
- H01F1/0556—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together pressed
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Powder Metallurgy (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
〔産業上の利用分野〕
本発明はＳｍ２Ｃｏ １７を代表とするＲ２Ｃ０４７系
磁石の製造方法に関するものである。Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method of manufacturing an R2C047-based magnet, typified by Sm2Co 17.
Ｒ（イツトリウムおよび希土類金属の少なくとも一種）
とＣＯとの金属間化合物からなる希土類磁石の製造方法
としては焼結による方法、鋳造による方法、および結合
剤を用いる方法の三つに大別される（特開昭６０−４８
８８４号公報）。R (at least one of yttrium and rare earth metal)
Methods for producing rare earth magnets made of intermetallic compounds of CO and CO are roughly divided into three types: sintering, casting, and using a binder (Japanese Patent Laid-Open No. 60-48
Publication No. 884).
ところで、結合剤を用いる方法には、結合剤に高分子樹
脂を用いるもの（高分子複合磁石と呼ぶ）と金属を用い
るものとがあるが、前者は強固でありながら複雑な形状
のものも成形によって得やすい利点がある反面、焼結法
や鋳造法による磁石に比して磁石特性が低いという欠点
がある。また後者の方法は、量産効率が低くかつ得られ
た磁石は磁石特性が低いばかりでなく、耐熱性も低い欠
点がある（特開昭６０−２１４５０５号公報）。By the way, there are two methods that use a binder: one that uses a polymer resin as the binder (called a polymer composite magnet) and the other that uses metal.The former is strong but also allows for molding of complex shapes. Although it has the advantage of being easy to obtain, it has the disadvantage of having poor magnetic properties compared to magnets made by sintering or casting. Furthermore, the latter method has the drawbacks of low mass production efficiency and the resulting magnet not only has poor magnetic properties but also low heat resistance (Japanese Patent Application Laid-Open No. 60-214505).
一方、焼結法による磁石は、加圧成形時に割れ。On the other hand, magnets made using the sintering method crack during pressure forming.
かけ、スリップが発生し易い。しかも焼結による収縮変
形があるので、成形時に製品の最終形状を得ることがで
きず、そのため焼結体の加工を必要とし、製品の歩留が
良くない。It is easy to run and slip. Moreover, since there is shrinkage deformation due to sintering, the final shape of the product cannot be obtained during molding, and therefore processing of the sintered body is required, resulting in poor product yield.
従って２本発明の目的は成形時に製品の最終形状が得ら
れるとともに前述の従来の結合剤を用いた高分子複合磁
石よりはるかに高い磁石特性および改善された機械強度
を有するＲ２ ＣＯ１７系磁石を製造する方法を提供す
ることである。Therefore, the object of the present invention is to produce R2 CO17-based magnets that can obtain the final shape of the product during molding and have much higher magnetic properties and improved mechanical strength than the aforementioned conventional polymer composite magnets using binders. The goal is to provide a method to do so.
本発明はｒ Ｒ２Ｃ０１７系磁石合金粉末に、粉末状の
低融点金属Ｍ（ＭはＡｔ 、 Ｐｂ 、 Ｚｎ 、 Ｓ
ｎの一種または二種以上）を体積比で５〜３５％混合し
。In the present invention, a powdery low melting point metal M (M is At, Pb, Zn, S
One or more types of n) are mixed in a volume ratio of 5 to 35%.
４００℃以上の温度にて熱間加圧成形することを特徴と
する。It is characterized by hot press forming at a temperature of 400°C or higher.
ここで、低融点金属Ｍの混合量が５％未満であると粉末
間の空隙を満すのに不充分であり、成形後の機械的強度
が低くなり、また３５％を越えると非磁性相が多くなｐ
すぎ、磁石特性の改善が得られなくなる。従って１Ｍの
混合量は５〜３５％とする。Here, if the mixing amount of the low melting point metal M is less than 5%, it will be insufficient to fill the voids between the powders, resulting in low mechanical strength after molding, and if it exceeds 35%, non-magnetic phase will occur. There are many p
If the temperature is too high, it will not be possible to improve the magnetic properties. Therefore, the mixing amount of 1M is 5 to 35%.
また、熱間加圧における温度が４００℃未満では、成形
体のち密化かはフかれないので、４００℃以上を必要と
する。成形温度に上限は無いが。Further, if the temperature during hot pressing is less than 400°C, the molded product will not be densified or not, so a temperature of 400°C or higher is required. There is no upper limit to the molding temperature.
８５０℃以上では、密度向上効果が飽和してしまうので
、８５０℃を超えた高温で成形することはエネルギー消
費の点から好ましくない。If the temperature is 850°C or higher, the density improvement effect will be saturated, so molding at a high temperature exceeding 850°C is not preferable from the viewpoint of energy consumption.
なお加圧は通常の熱間ゾレスだけでなく熱間静水圧プレ
スで行なっても良く、成形体の緻密化のためには、少な
くとも５ｋｆＩｙ／Ｃｒｎ２の加圧力が好ましい。Note that pressing may be carried out not only by ordinary hot Soles but also by hot isostatic pressing, and in order to make the compact compact, a pressing force of at least 5 kfIy/Crn2 is preferable.
以下２本発明の詳細な説明する。Two aspects of the present invention will be described in detail below.
実施例 Ｉ
Ｓｍが２６． Ｏｗｔ％、 Ｆｅが１４．８ｗｔ％、
Ｃｕが４，８ｗｔ％、 Ｚｒが２．３ｗｔ％、 Ｔｉが
０．２ ｗｔ％、残部Ｃｏとなるように、アルゴン雰囲
気中で高周波加熱により溶解し、インコ゛ットを作製し
た。Example I Sm is 26. Owt%, Fe is 14.8wt%,
An incoat was prepared by melting Cu by high-frequency heating in an argon atmosphere so that Cu was 4.8 wt%, Zr was 2.3 wt%, Ti was 0.2 wt%, and the balance was Co.
このインゴットを１１９０℃で２時間保持し急冷した後
、８００℃で８時間保持した後１℃／分で冷却し時効し
た。以上の熱処理を行なったインゴットを、平均粒子径
が１０μｍになるようにボールミルにて粉砕した。This ingot was held at 1190°C for 2 hours and rapidly cooled, then held at 800°C for 8 hours, and then cooled at 1°C/min for aging. The ingot subjected to the above heat treatment was ground in a ball mill so that the average particle size was 10 μm.
この磁石粉末に、５〜３５ ｖｏ１％の粉末状のＺｎを
混合し、成形用粉末とした。この成形用粉末を成形金型
につめ、 ２０ ｋｏｅの磁場をかけながら。Powdered Zn of 5 to 35 vol% was mixed with this magnet powder to obtain a molding powder. This molding powder was packed into a mold and a magnetic field of 20 koe was applied.
真空下で６００℃の温度、 １０００ ｋｆ／１ｙｎ２
（Ｄ 圧力で１５分間圧力成形した。Temperature of 600℃ under vacuum, 1000 kf/1yn2
(Pressure molded at D pressure for 15 minutes.
上記の方法で成形した成形体の抗折力を第１図に示す。FIG. 1 shows the transverse rupture strength of the molded product molded by the above method.
５〜２０ ｖｏｌ ％混合量では混合量と抗折力が比例
しているがｐ ２０ ｖｏ１％を越える量を混合しても
、抗折力にそれほど大きな変化はなく。At a mixing amount of 5 to 20 vol %, the transverse rupture strength is proportional to the mixing amount, but even if an amount exceeding 1% p 20 vol is mixed, there is no significant change in the transverse rupture strength.
３５％で飽和する。Saturation occurs at 35%.
また、Ｚｎ混合量に対する磁気特性の変化を第２図に示
す。Ｚｎ添加量とともに磁気特性が劣化し。Further, FIG. 2 shows the change in magnetic properties with respect to the amount of Zn mixed. Magnetic properties deteriorate with increasing amount of Zn added.
４０襲添加のとき、従来の高分子複合磁石の特性とほぼ
同一となる。従ってＺｎ添加量は４０％以下とすること
が必要である。When 40% is added, the properties are almost the same as those of conventional polymer composite magnets. Therefore, it is necessary that the amount of Zn added be 40% or less.
実施例 ２
実施例１と同様に、 （Ｓｍ−Ｃｏ−Ｆｅ−Ｃｕ−Ｚｒ
−Ｔｉ）の磁石粉末に５〜３５ ｖｏ１％Ｚｎ粉末を混
合した成形用粉末を４００℃〜８００℃の温度範囲で、
１０００ｋｆｌ／ｃｐｎ２の加圧力にて熱間加圧成形
した。一定の成形温度に於て、理論密度の成形体を得る
ためには。Example 2 Similarly to Example 1, (Sm-Co-Fe-Cu-Zr
-Ti) magnet powder mixed with 5 to 35 vol% Zn powder in a temperature range of 400°C to 800°C,
Hot pressure molding was performed at a pressure of 1000 kfl/cpn2. To obtain a molded product with the theoretical density at a constant molding temperature.
成形温度が低い程、多くの結合相を必要とする。Lower molding temperatures require more binder phase.
そこで第３図には、成形温度と理論密度を得るために必
要な最少Ｚｎ混合量の関係を示す。成形温度が高くなる
に従い、 Ｚｎ混合量を減少させることができる。Therefore, FIG. 3 shows the relationship between the molding temperature and the minimum mixing amount of Zn required to obtain the theoretical density. As the molding temperature increases, the amount of Zn mixed can be reduced.
実施例では、結合剤としてＺｎのみで述べたが。In the examples, only Zn was used as the binder.
他の低融点金属である、ｋＡ ｐ Ｐｂ ｇ Ｓｎ ＊
の純金属及び合金を一種または二種以上を用いても、同
様の効果が得られる。Other low melting point metals, kA p Pb g Sn *
Similar effects can be obtained by using one or more pure metals and alloys.
〔発明の効果〕
本発明について以上詳しく説明したが、 Ｒ２Ｃｏ１７
系磁石合金粉末と、低融点金属（Ａｚｙｐｂｙｚｎｙｓ
ｎ）を混合し、熱間加圧成形することで、高分子複合磁
石と同等の強い靭性をもちながら２歩留を著しく向上さ
せ、かつ、高分子複合磁石に比較し、はるかに高い磁石
特性が得られ、工業的に非常に有益である。[Effects of the Invention] Although the present invention has been explained in detail above, R2Co17
based magnet alloy powder and low melting point metal (Azypbyznys
By mixing n) and hot-pressing, it has the same strong toughness as a polymer composite magnet, while significantly improving the 2 yield, and has much higher magnetic properties than a polymer composite magnet. is obtained and is industrially very useful.
第１図は、実施例１におけるＳｍ ２ ＣＯ１７系合金
粉末に対するＺｎ粉末の混合量と抗折力の関係を示す図
、第２図は、実施例１における５ｍ２ｃｏ、７系合金粉
末に対するＺｎ粉末の混合量と磁石特性の関係を示す図
、第３図は、実施例２における熱間加圧成形時の温度と
、理論密度の成形体を得るのに必要な最少のＺｎ量との
関係を示す図である。
伐理人（７７８３）弁理士池田志保
第１図
第３図
熱間加圧成形特温度（℃）Fig. 1 is a diagram showing the relationship between the mixing amount of Zn powder and transverse rupture strength for Sm 2 CO17 alloy powder in Example 1, and Fig. 2 is a diagram showing the relationship between the amount of Zn powder mixed and transverse rupture strength for Sm 2 CO 17 alloy powder in Example 1. Figure 3, a diagram showing the relationship between the mixing amount and magnetic properties, shows the relationship between the temperature during hot press forming in Example 2 and the minimum amount of Zn necessary to obtain a compact with the theoretical density. It is a diagram. Logger (7783) Patent Attorney Shiho Ikeda Figure 1 Figure 3 Special temperature for hot pressing (℃)
Claims (1)
類金属の少なくとも一種）系磁石合金粉末に、粉末状の
低融点金属Ｍ（ＭはＡｌ、Ｐｂ、Ｚｎ、Ｓｎの一種また
は二種以上）を体積比で５〜３５％混合し、４００℃以
上の温度にて熱間加圧成形することを特徴とする希土類
磁石の製造方法。1. Powdered low melting point metal M (M is one or more of Al, Pb, Zn, and Sn) is added to R_2Co_1_7 (R is at least one of yttrium and rare earth metal) based magnet alloy powder at a volume ratio of 5 to 5. A method for producing a rare earth magnet, which comprises mixing 35% and hot pressing at a temperature of 400°C or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9976286A JPS62284027A (en) | 1986-04-30 | 1986-04-30 | Manufacture of rare-earth magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9976286A JPS62284027A (en) | 1986-04-30 | 1986-04-30 | Manufacture of rare-earth magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62284027A true JPS62284027A (en) | 1987-12-09 |
Family
ID=14255987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9976286A Pending JPS62284027A (en) | 1986-04-30 | 1986-04-30 | Manufacture of rare-earth magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62284027A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111091943A (en) * | 2019-12-24 | 2020-05-01 | 中国计量大学 | Low-temperature coefficient Sm2Co17Molded sintered magnet and method for producing same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4866524A (en) * | 1971-12-14 | 1973-09-12 | ||
| JPS5149118A (en) * | 1974-10-25 | 1976-04-28 | Suwa Seikosha Kk |
-
1986
- 1986-04-30 JP JP9976286A patent/JPS62284027A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4866524A (en) * | 1971-12-14 | 1973-09-12 | ||
| JPS5149118A (en) * | 1974-10-25 | 1976-04-28 | Suwa Seikosha Kk |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111091943A (en) * | 2019-12-24 | 2020-05-01 | 中国计量大学 | Low-temperature coefficient Sm2Co17Molded sintered magnet and method for producing same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0239031B1 (en) | Method of manufacturing magnetic powder for a magnetically anisotropic bond magnet | |
| US5085716A (en) | Hot worked rare earth-iron-carbon magnets | |
| JPS6181606A (en) | Preparation of rare earth magnet | |
| JPS6181603A (en) | Preparation of rare earth magnet | |
| JPS62284027A (en) | Manufacture of rare-earth magnet | |
| JPS62206801A (en) | Manufacture of rare earth magnet | |
| JPS6350444A (en) | Manufacture of nd-fe-b sintered alloy magnet | |
| JPS6181607A (en) | Preparation of rare earth magnet | |
| JPS5812331B2 (en) | intermetallic compound magnet | |
| JPH0478699B2 (en) | ||
| JPS61295342A (en) | Manufacture of permanent magnet alloy | |
| JPS62282417A (en) | Manufacture of rare earth magnet | |
| CA2034632C (en) | Hot worked rare earth-iron-carbon magnets | |
| JPS58108711A (en) | Manufacture of rare earth permanent magnet | |
| JPS61208808A (en) | Manufacture of sintered magnet | |
| JPH07110965B2 (en) | Method for producing alloy powder for resin-bonded permanent magnet | |
| JPS61261448A (en) | Production of permanent magnet having high energy product | |
| JPS6350469A (en) | Manufacture of alloy target for sputtering | |
| JPS63137136A (en) | Manufacture of rare earth-iron group sintered permanent magnet material | |
| JPS58108709A (en) | Manufacture of rare earth permanent magnet | |
| JPH07211566A (en) | Manufacture of anisotropic magnet | |
| JPS5819409A (en) | Manufacture of isotropic mn-al-c magnet | |
| JPS63306602A (en) | Rare earth co compound magnet and manufacture thereof | |
| JPS61130436A (en) | Manufacture of rare earth metal magnet | |
| JPS5827321B2 (en) | Permanent magnet manufacturing method |