JPS61276303A - Manufacture of rare earths permanent magnet - Google Patents
Manufacture of rare earths permanent magnetInfo
- Publication number
- JPS61276303A JPS61276303A JP60118515A JP11851585A JPS61276303A JP S61276303 A JPS61276303 A JP S61276303A JP 60118515 A JP60118515 A JP 60118515A JP 11851585 A JP11851585 A JP 11851585A JP S61276303 A JPS61276303 A JP S61276303A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- magnetic
- alloy
- compound
- rare earth
- 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
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
- H01F1/0578—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 bonded together
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は希土類永久磁石の製造方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for manufacturing rare earth permanent magnets.
本発明は、希土類永久磁石の製造方法において、特に焼
結希土類磁石の改良であり、希土類磁石合金粉末と結合
剤からなる混合物を磁場押出成形法により成形後焼結し
てつくられることにより、焼結磁石の寸法精度を高め、
２次加工を極めて少くできる上、磁気特性の劣化を防止
できるようにしたものである。The present invention relates to a method for producing rare earth permanent magnets, in particular an improvement to sintered rare earth magnets, and is produced by molding and sintering a mixture of rare earth magnet alloy powder and a binder using a magnetic field extrusion method. Improving the dimensional accuracy of the compacted magnet,
This makes it possible to minimize secondary processing and prevent deterioration of magnetic properties.
従来の焼結希土類磁石の製造方法は、例えば、特公昭５
Ｂ−９８０４号の様に、希土類磁石合金粉末を高い圧力
（数トン／、、ＴＩ）で圧縮成形するためのものであっ
た。Conventional methods for producing sintered rare earth magnets include, for example,
Like No. B-9804, it was for compression molding rare earth magnet alloy powder at high pressure (several tons/, TI).
〔本発明が解決しようとする問題点及び目的〕しかし、
前述の従来技術では次のような問題点を有する。[Problems and objectives to be solved by the present invention] However,
The above-mentioned conventional technology has the following problems.
（１） 比較的形状の単純な物品しか成形できない。(1) Only articles with relatively simple shapes can be molded.
例えば円柱、角柱１円板などの形状で、焼結後２次加工
によって製品形状に加工することを原則としている。For example, the shape is a cylinder, a prismatic disk, etc., and as a general rule, it is processed into a product shape by secondary processing after sintering.
（２） 乾式加圧成形のため、金型表面と磁石混合粉
末の間には摩擦を生じ、圧粉成形物は不均一加圧される
ため、焼結時に収縮率に差違を生じる。(2) Due to dry pressure molding, friction occurs between the mold surface and the magnetic mixed powder, and the compacted product is pressed unevenly, resulting in a difference in shrinkage rate during sintering.
このため物品は、変形量が大きくなり、必然的に加工量
が大きくなる。このことは、加工歪の発生が大となり、
且つ、加工時間が遅くなるので、磁気性能、コスト（生
産性）低下の原因になる。Therefore, the amount of deformation of the article becomes large, and the amount of processing inevitably becomes large. This increases the occurrence of machining distortion,
In addition, processing time is delayed, which causes a decrease in magnetic performance and cost (productivity).
本発明は以上の問題点を解決するもので、その目的とす
るところは、希土類焼結磁石の寸法、形状精度を高め複
雑異形状まで焼結法で製造できる上、加工変質層を極力
少く出来るので、磁気性能の劣化を防止することにある
。The present invention is intended to solve the above-mentioned problems, and its purpose is to improve the dimensional and shape accuracy of rare earth sintered magnets, to enable production of complex irregular shapes by the sintering method, and to minimize the number of damaged layers due to processing. Therefore, the purpose is to prevent deterioration of magnetic performance.
本発明は希土類磁石に係り特に、Ｙ、ａｍ。 The present invention relates to rare earth magnets, particularly Y, am.
０・、Ｈａ、Ｇｄ、Ｔｂ、Ｄｙ、などの希土類金属と遷
移金属、半金属等から構成された合金組成物である。具
体的には、８ｍ０ｏ１１．Ｏ’ｅＯｏｌ 、 ！Ｉｍａ
ｌｌｐｒｏ、５ｏｏｓ 、などの１：５系希土類金属間
化合物磁石ｅ ５ｌｎ（００ｂａｘｏｕ（ＬＯ８ｙ＠ａ
ｔｓ Ｚｒαｏｓｓ）ｙ、ａ８ ｍ （Ｏｏ ’ｈａ１
ａ ｕ （Ｌ Ｏ８’１！Ｌｍ ａ五ＩＩ ’ｌ
’１（Ｌ６！ ）ｙ、８ ８ｍａｓ ＹＩＬＩ”
’ｂａｌ ０ｕｌｌ ｙ＠ａｘｓ） チーＢ
＠ ｓｍ（ｃｏｂｓＬｌ ０ｕ（ＬＸ １／＠Ｉ
ＬＸｍＮｉｃＬｏｚ）ｙ、ａ 、などの２：１７系希土
類金属間化合物磁石、および、ＨＡＭ ７ｅｌａＢ 、
ＭｄＰａ Ｃｏ Ｂなどの正方晶系希土類金属化合物
が対象となる。これら組成物は、目的とする成分で溶解
され合金をつくり、次に微粉末となす。あるいは、合金
塊は溶体化処理、時効処理などを行って、磁気的硬化処
理を終了してから微粉末となす場合がある。前記磁石粉
末は、その粒度は概ね２μｍ〜１００μ溝の範囲が好ま
しい。１００μ溝をこえてくると磁場押出成形で寸法精
度が悪くなり、又外観が荒れてくるからである。２μ鴇
以下になると粉末が酸化し易くなり工業的に製造するこ
とがむずかしくなるからである。次に結合材は、主に有
機物樹脂、油脂、ワックスなどを用いる。有機物樹脂は
、熱可履性樹脂を用い、例えばナイロン、塩化ビニール
、ゴム、ｍｖａ、ｐｖＡ、などである。これらは５０℃
〜５００℃に加熱すると、可塑性を呈し、流動状となる
。磁石粉末と結合剤の配合比率は次のようになる。磁石
粉末は、５０ ’Ｖｏｔ％〜７０ ＶｏＡ外が好ましい
。これ以下では、流動性は良いが、焼結時の収縮率が大
となり、またそのため寸法。It is an alloy composition composed of rare earth metals such as 0.0, Ha, Gd, Tb, and Dy, and transition metals, semimetals, and the like. Specifically, 8m0o11. O'eOol,! Ima
1:5 rare earth intermetallic compound magnets such as llpro, 5oos, etc.
ts Zrαoss)y, a8 m (Oo 'ha1
a u (L O8'1! Lm a5 II 'l
'1 (L6!)y, 8 8mas YILI'
'bal 0ull y@axs) Chi B
@sm(cobsLl 0u(LX 1/@I
2:17 rare earth intermetallic compound magnets such as LXmNicLoz)y, a, and HAM 7elaB,
Tetragonal rare earth metal compounds such as MdPa Co B are targeted. These compositions are melted with the desired components to form an alloy, and then made into a fine powder. Alternatively, the alloy ingot may be subjected to solution treatment, aging treatment, etc., and then turned into fine powder after completing the magnetic hardening treatment. The particle size of the magnetic powder is preferably in the range of approximately 2 μm to 100 μm. This is because when the groove exceeds 100μ, the dimensional accuracy deteriorates due to magnetic field extrusion molding, and the appearance becomes rough. This is because if the particle size is less than 2μ, the powder becomes easily oxidized, making it difficult to produce it industrially. Next, as the binding material, organic resin, oil, wax, etc. are mainly used. The organic resin used is a thermoplastic resin such as nylon, vinyl chloride, rubber, mva, pvA, etc. These are 50℃
When heated to ~500°C, it becomes plastic and fluid. The blending ratio of magnet powder and binder is as follows. The magnet powder preferably has an outside of 50' Vot% to 70 VoA. Below this, the fluidity is good, but the shrinkage rate during sintering becomes large, and the dimensions are affected accordingly.
形状精度が低下するので５０ ＶｏＬ％が好ましい。Since the shape accuracy decreases, 50 VoL% is preferable.
また７０ＶｏＬ％ をこえると、押出成形しにくくなり
、所望の形状を製造しにくくなるのでこれまでとした。Moreover, if it exceeds 70 VoL%, it becomes difficult to extrude and manufacture a desired shape, so this is the limit.
また磁場配向度が悪くなり磁気性能低下の因でもあるの
でｙ ｏ ｖｏｔ％までが好ましい。Further, since the degree of magnetic field orientation deteriorates and is a cause of deterioration of magnetic performance, it is preferable that the amount is up to yo vot%.
こうしてつくられた磁石混合物は、第１図に示す磁場押
出成形法により、グリ−ボディ（仮成形体）をつくる。The magnetic mixture thus produced is used to form a green body (temporary molded body) by the magnetic field extrusion method shown in FIG.
４つ６石原料フンパウンドは、２のバレル内に装入され
、ヒーター３により外部から加熱し、１のプランジャー
にて４の流動状コンパウンドは前方に押され５の電磁石
コイルにはさまれたギャップ部６に８ＫＯ６以上の磁場
を発生させた領域を通過させ、且つそのエアーで空冷固
化させて成形体をつくることを特徴とする。この仮成形
体８は、電気炉に装入し、５０℃〜５００℃に除熱結合
材を蒸発揮散させ次に１０００℃〜１２５０℃に加熱焼
結させたことを特徴とする。The 4 and 6 raw material powder compounds are charged into the barrel 2 and heated from the outside by the heater 3, and the fluid compound 4 is pushed forward by the plunger 1 and sandwiched between the electromagnetic coils 5. The molded body is produced by passing through a region in which a magnetic field of 8KO6 or more is generated through the gap 6, and cooling and solidifying with the air. This temporary molded body 8 is characterized in that it is charged into an electric furnace, the heat removal binding material is evaporated and diffused to 50°C to 500°C, and then heated and sintered to 1000°C to 1250°C.
組成が原子比で（ＯＯａ！ Ｎ＋ｔｏ、ｌｌ Ｐｒａり
１８７９ｇ７００１６Ｂ８ の希土類磁石合金１０９
を高周波溶解炉で溶製した。溶解合金は、ボールミルに
て粒度２μ溝〜５μ溝の微粉とし第１表に示す条件で結
合剤を混合し原料コンパウンドをつくった。Rare earth magnet alloy 109 with a composition in atomic ratio (OOa! N+to, 1879g70016B8)
was melted in a high-frequency melting furnace. The molten alloy was milled into fine powder with a grain size of 2 to 5 microns using a ball mill, and a binder was mixed under the conditions shown in Table 1 to prepare a raw material compound.
第 １ 表
なお磁石粉末は微粉末のため空気中における酸化発生熱
を防止するため、混線は、窒素ガス中で行った。次に混
練したコンパウンドは、本発明法は第１図に示す磁場押
出成形法で成形し同様従来法は第２図に示した磁場圧縮
成形法でつくった。Table 1 Note that since the magnet powder is a fine powder, crosstalk was performed in nitrogen gas to prevent heat generated by oxidation in the air. Next, the kneaded compound was molded by the magnetic field extrusion molding method shown in FIG. 1 in the method of the present invention, and similarly by the magnetic field compression molding method shown in FIG. 2 in the conventional method.
本発明方法は、原料コンパウンド４は、２のバレル内で
ヒーター５により加熱されなから１のピストンラムによ
り常に加圧（約５００〜５ｏａｒ、／−）されている。In the method of the present invention, the raw material compound 4 is not heated by a heater 5 in two barrels, but is constantly pressurized (approximately 500 to 5 oar, /-) by one piston ram.
バレル内は、所望の温度に加熱され磁石と結合材のコン
パウンドは、流動状となリ、６の空間で、コイル５によ
り約ａｘｏ ｅ〜１５ＫＯｅに磁場印加され配向処理を
終え、次に７のノズルより空気又は、Ｎ２．ムｒガスあ
るいは、００．ガスなどを吹き付けながら冷却固化する
のである。結合材は、熱可履性有機物樹脂を用いれば良
い。理由は混合物をシャプシャプ（流動状）とできるの
で、磁場配向し易いこと並びに複雑形状、薄肉形状に極
めて有利になるからである。−方比較例は、第２図に圧
縮成形装置の一断面図を示す。磁石粉末１５は、磁場中
におかれ、上パンチ１４．下パンチ１３．を介して磁場
を加えながら１ｍ／ｄ〜５ ｔａ ／−で成形される。The inside of the barrel is heated to a desired temperature, and the magnet and binder compound are in a fluid state.In the space of 6, a magnetic field of about axo e to 15 KOe is applied by a coil 5 to complete the orientation process, and then in the space of 7. Air or N2 from the nozzle. Murgas or 00. It is cooled and solidified while being blown with gas. As the binding material, a thermoplastic organic resin may be used. The reason is that since the mixture can be made sharp (fluid), it is easy to orient in a magnetic field, and it is extremely advantageous for complex shapes and thin shapes. FIG. 2 shows a sectional view of a compression molding apparatus for the comparative example. The magnet powder 15 is placed in a magnetic field and the upper punch 14. Lower punch 13. The molding is performed at 1 m/d to 5 ta/- while applying a magnetic field through the .
圧力発生手段は、はとんど油圧により行われる。The pressure generating means is mostly hydraulic.
本実施例で得られた素成形品の寸法形状は、４１０％で
、長さ１．０００％に切断した。生産スピードは、５＝
ｏｏｏ■／時間という速さでありた。The dimensions and shape of the raw molded product obtained in this example were 410%, and the length was cut to 1.000%. The production speed is 5=
It was as fast as ooo■/hour.
、なお比較例は、φ１０Ｘ１５ｔ％を、６０秒で成形で
きた。従ってその生産スピードは、９００” ／ 時間
（６０）７時間）で、本発、明方法に比べ極めて遅いも
のであった。次に試料は、φ１０××１０ｔ％に切断し
、第２表に示す条件で脱バインダー処理を、続いて焼結
を行った。各々の熱処理パターンを第３図−α、ｂに示
す。第２表に製造条件を示す。In addition, in the comparative example, φ10×15t% could be molded in 60 seconds. Therefore, the production speed was 900"/hour (60) 7 hours), which was extremely slow compared to the method of the present invention and the invention. Next, the sample was cut into φ10×10t%, and the results are shown in Table 2. Binder removal treatment and subsequent sintering were performed under the conditions shown.The respective heat treatment patterns are shown in Figure 3-α and b.Table 2 shows the manufacturing conditions.
第 ２ 表
なお脱バインダーは、真空炉中減圧下で行い、焼結はＡ
ｒガス雰囲気下で行りた。次に各試料の緒特性を第５表
に示した。Table 2 The binder removal was carried out under reduced pressure in a vacuum furnace, and the sintering was carried out in A.
The test was carried out under an r gas atmosphere. Next, Table 5 shows the properties of each sample.
第 ３ 表
寸法変化については、第４ｗＪに示す外観形状を焼結上
りのままについて、”ｌｓ”！外径をマイクロメーター
にて測定した。それによれば、本発明法は、極めて寸法
形状歪のないことがわかりた。理由は、流動状となりた
コンパウンドを加圧押出ながら成形するので均等加圧（
アイソスタティック成形）による、内部歪の発生が極め
て少いことが考えられる。一方比較例は一軸加圧成形の
ため、また固体状分散混合粉末の成形であるからどうし
でも内部歪の発生がある。このため収縮率に差異を生じ
、変形するのである。また磁気特性についても収縮率が
一定なので配向度を乱すことが少くなるためＢｒ（残留
磁束密度）を高められた〔実施例２〕
実施例１で用いたのと同じ磁石合金を用いて、結合材に
ナイロン１２を約ｓ ｓ ｖｏｔ（容量）％加え予備混
練した試料を第５図に示す装置で円筒−状磁石をつくっ
た。原料コンパウンド２０はバレル１９内でヒーター２
１により約２００〜２６０℃に加熱され、スフ！ｊ ＆
−１８で前方へ押出される。ここで加熱により可塑化さ
れたコンパウンドは、磁場コイル２３に５０Ａ〜１００
入電流を加工磁場を２５の目−りにて導き２５の外型と
、コア２６間のギャップに約８〜１５ＫＯｅのラジアル
配向磁場を発生させる。可塑化され流動状となったコン
パウンド２１は、ラジアル配向された加工物２７は捜２
５から外へ出ると、即２８のノズルより空冷され固化さ
れる。成形された円筒状磁石の寸法形状は、φ２０×φ
１ａｘ２ｏｔ％であった。円筒状磁石は真空炉中に投入
し次の条件で脱バインダー処理を行った。α５℃／分で
４００℃まで加熱 約５時間キープして結合バインダー
を除去してから、１０℃／分で常温まで急冷した。焼結
はＡｒガス雰囲気炉中で行りた。Regarding the dimensional changes in Table 3, regarding the external shape shown in No. 4 wJ as it is after sintering, "ls"! The outer diameter was measured with a micrometer. According to the results, it was found that the method of the present invention is extremely free from dimensional and shape distortion. The reason is that the fluidized compound is molded while being extruded under pressure, so even pressure is applied (
It is thought that the occurrence of internal strain is extremely small due to isostatic molding. On the other hand, since the comparative example is uniaxially pressed and molded from a solid dispersed mixed powder, internal strain occurs in both cases. This causes a difference in shrinkage rate and deformation. Regarding magnetic properties, since the contraction rate is constant, the degree of orientation is less disturbed, so Br (residual magnetic flux density) can be increased. [Example 2] Using the same magnetic alloy as used in Example 1, About ss vot (volume) % of nylon 12 was added to the material and a sample was pre-kneaded to make a cylindrical magnet using the apparatus shown in FIG. The raw material compound 20 is heated to the heater 2 in the barrel 19.
1, it is heated to about 200-260°C and it's hot! j&
Pushed forward at -18. Here, the compound plasticized by heating is applied to the magnetic field coil 23 at 50A to 100A.
The input current is applied to a machining magnetic field at 25 points to generate a radial orientation magnetic field of about 8 to 15 KOe in the gap between the outer mold 25 and the core 26. The plasticized and fluidized compound 21 is transferred to the radially oriented workpiece 27.
When it comes out from the nozzle 5, it is immediately air-cooled and solidified by the nozzle 28. The dimensions and shape of the molded cylindrical magnet are φ20×φ
It was 1ax2ot%. The cylindrical magnet was placed in a vacuum furnace and subjected to binder removal treatment under the following conditions. α Heated to 400°C at 5°C/min and held for about 5 hours to remove the binding binder, then rapidly cooled to room temperature at 10°C/min. Sintering was performed in an Ar gas atmosphere furnace.
焼結した円筒状磁石は、第６図に示すように、外径部測
定を行った。Ｄａは端部で、Ｄｂは長さの１／２部を測
ったものである。値は５＝１０コの平均値およびＲ（Ｍ
ａｘ −Ｍｉｎ ）を示す。The outer diameter of the sintered cylindrical magnet was measured as shown in FIG. Da is the end and Db is the measurement of 1/2 part of the length. The value is the average value of 5=10 and R(M
ax-Min).
一方従来法についても同様合金粉末を用いバインダーに
パラフィンを使用して圧縮成形法でφ２０×φ１ Ｂ×
４ｔ％の円筒状試料を成形した。なおｔが４％というの
は、圧縮成形法では、ラジアル磁場配向できないからで
ある。次に本発明法と同一ノ条件で脱バインダー処理お
よび焼結を行った。その結果変形と割れｉ生じ、大変歩
留りが悪く実用上問題の多いことがわかった。On the other hand, regarding the conventional method, using the same alloy powder and using paraffin as a binder, compression molding was performed to form φ20×φ1 B×
A 4t% cylindrical sample was molded. Note that t is 4% because radial magnetic field orientation cannot be achieved in the compression molding method. Next, binder removal treatment and sintering were performed under the same conditions as in the method of the present invention. As a result, deformation and cracking occurred, resulting in a very poor yield and many practical problems.
寸法の、ｓ：：１０個のデータは次の通りであった。The data for s::10 dimensions were as follows.
Ｄａ・・・・・・’Ｅ’１＆５％ Ｂ＝（１，５％Ｄ
ｂ ・−・−ｘ Ｉ ＥＬ Ｏｙ Ｒ＝ ｌ ５５
＃このようにバラツキが大きく、所望寸法に仕上げる
ためには、加工時間が大となり、コストアップ、生産性
も低下するなどの欠点がある。Da...'E'1&5% B=(1,5%D
b ・−・−x I EL Oy R= l 55
#There are such large variations, and there are disadvantages such as a long processing time, increased cost, and decreased productivity in order to finish to the desired dimensions.
以上述べたように本発明によれば希土類磁石粉末と結合
剤からなる原料コンパウンドを磁場中押出成形法により
成形し、次に脱バインダー処理、続いて焼結してつくら
れる永久磁石の製造法に関し次のような効果を得られる
ことを特長とする。As described above, the present invention relates to a method for manufacturing a permanent magnet in which a raw material compound consisting of rare earth magnet powder and a binder is molded by extrusion molding in a magnetic field, then subjected to binder removal treatment, and then sintered. It is characterized by the following effects.
内部歪のない均質加圧成形物品ができるので、焼結に−
して変形９割れの発生を防止する効果は極めて大である
。従って２次加工は、いらないか、又は、若干の加工が
最終製品とすることができる利点がある。もちろんコス
ト低減、生産性の向上も達成できる。また、今まで長さ
の制限がありた、ものが全くなくなるので形状の自由度
を高められる。特にラジアル異方性希土類焼結磁石は、
薄肉のｔ ： １．５％以下０．２％程度の寸法が要求
されるが従来は、圧縮成形法で製造できなかりたが、本
願では量産対応出来るようになった。このため、ＰＭス
テップモーターの高性能化、マグロールの小型化、磁気
センサー、磁気カップリングなどの高パワー化などに特
徴を発揮できる。A homogeneous press-formed article with no internal distortion can be produced, making it suitable for sintering.
This is extremely effective in preventing the occurrence of deformation cracks. Therefore, there is an advantage that secondary processing is not required or only a slight amount of processing is required to produce the final product. Of course, cost reduction and productivity improvement can also be achieved. Additionally, there are no longer any restrictions on length, which increases the degree of freedom in shape. In particular, radial anisotropic rare earth sintered magnets
Thin wall t: 1.5% or less, about 0.2%, is required, but conventionally this could not be manufactured by compression molding, but with the present application, it has become possible to mass produce. Therefore, it can be used to improve the performance of PM step motors, miniaturize mag rolls, and increase the power of magnetic sensors, magnetic couplings, etc.
第１図は、本発明にかかる磁場押出成形法の断面図、第
２図は従来法の磁場圧縮成形法の断面図第５図（α１（
Ａ）は実施例１の脱バインダーおよび焼結条件の加熱、
保持、冷却パターン図第４図は焼結磁石の概観図、第５
図は、本発明性実施例２に係る円筒状磁石の磁場押出成
形断面図、第６［は、焼結上り円筒状磁石の概観図を示
す。
以上
ｘｈ４．饗ツシ、以モク鳳−曲世ロ４
第１図
）１！、Ｊ、−４ンτ−Ｄｉｇｌ−ン＠
末を番素−一さ夕ひ窺ノ？クー〉ル］′：：τ３
図（久） 第３図（り
辻錦鳳石、水札口FIG. 1 is a cross-sectional view of the magnetic field extrusion molding method according to the present invention, and FIG. 2 is a cross-sectional view of the conventional magnetic field compression molding method.
A) is the debinding and heating of the sintering conditions of Example 1;
Holding and cooling pattern diagram Figure 4 is an overview of the sintered magnet, Figure 5
The figure shows a cross-sectional view of a cylindrical magnet formed by magnetic field extrusion according to Example 2 of the present invention, and the sixth figure shows an overview of a sintered cylindrical magnet. That's all xh4. 1! , J, -4nτ-Digl-n@
End of the story - Is it Yuhikino? Cool]'::τ3
Figure (Kyu) Figure 3 (Ritsuji Nishikihoseki, Mizufudaguchi
Claims (1)
るに当り希土類磁石合金粉末と結合剤からなる混合物を
、常温以上の温度に加熱しながら磁場配向して成形後、
焼結してつくられたことを特徴とする希土類永久磁石の
製造方法。In order to produce rare earth magnets made of rare earth metals and transition metals, a mixture of rare earth magnet alloy powder and a binder is heated to a temperature above room temperature and oriented in a magnetic field, and then shaped.
A method for producing a rare earth permanent magnet characterized by being made by sintering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60118515A JPS61276303A (en) | 1985-05-31 | 1985-05-31 | Manufacture of rare earths permanent magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60118515A JPS61276303A (en) | 1985-05-31 | 1985-05-31 | Manufacture of rare earths permanent magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61276303A true JPS61276303A (en) | 1986-12-06 |
Family
ID=14738535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60118515A Pending JPS61276303A (en) | 1985-05-31 | 1985-05-31 | Manufacture of rare earths permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61276303A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0318252A2 (en) * | 1987-11-27 | 1989-05-31 | Imperial Chemical Industries Plc | Process for the production of a bonded magnet |
| WO1991016717A1 (en) * | 1990-04-23 | 1991-10-31 | Eastman Kodak Company | Method of manufacturing high energy rare earth alloy magnets |
| JP2011135041A (en) * | 2009-11-25 | 2011-07-07 | Tdk Corp | Method for producing rare earth sintered magnet |
| JP2013191609A (en) * | 2012-03-12 | 2013-09-26 | Nitto Denko Corp | Rare earth permanent magnet and method for producing rare earth permanent magnet |
| EP2827347A4 (en) * | 2012-03-12 | 2016-01-20 | Nitto Denko Corp | Rare earth permanent magnet and rare earth permanent magnet production method |
-
1985
- 1985-05-31 JP JP60118515A patent/JPS61276303A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0318252A2 (en) * | 1987-11-27 | 1989-05-31 | Imperial Chemical Industries Plc | Process for the production of a bonded magnet |
| WO1991016717A1 (en) * | 1990-04-23 | 1991-10-31 | Eastman Kodak Company | Method of manufacturing high energy rare earth alloy magnets |
| JP2011135041A (en) * | 2009-11-25 | 2011-07-07 | Tdk Corp | Method for producing rare earth sintered magnet |
| JP2013191609A (en) * | 2012-03-12 | 2013-09-26 | Nitto Denko Corp | Rare earth permanent magnet and method for producing rare earth permanent magnet |
| EP2827347A4 (en) * | 2012-03-12 | 2016-01-20 | Nitto Denko Corp | Rare earth permanent magnet and rare earth permanent magnet production method |
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