JPS63138706A - Manufacture of permanent magnet - Google Patents
Manufacture of permanent magnetInfo
- Publication number
- JPS63138706A JPS63138706A JP61284406A JP28440686A JPS63138706A JP S63138706 A JPS63138706 A JP S63138706A JP 61284406 A JP61284406 A JP 61284406A JP 28440686 A JP28440686 A JP 28440686A JP S63138706 A JPS63138706 A JP S63138706A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- lubricant
- oleic acid
- iron
- permanent 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 description 9
- 239000000843 powder Substances 0.000 claims abstract description 32
- 239000000314 lubricant Substances 0.000 claims abstract description 21
- 238000000465 moulding Methods 0.000 claims abstract description 20
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims abstract description 14
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims abstract description 14
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims abstract description 14
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000005642 Oleic acid Substances 0.000 claims abstract description 14
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims abstract description 14
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims abstract description 9
- -1 oleic acid compound Chemical class 0.000 claims abstract description 8
- 229910000521 B alloy Inorganic materials 0.000 claims abstract description 7
- 239000003960 organic solvent Substances 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 claims description 5
- 230000032683 aging Effects 0.000 claims description 4
- 150000008282 halocarbons Chemical class 0.000 claims description 2
- 239000011812 mixed powder Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 18
- 239000002904 solvent Substances 0.000 abstract description 12
- 238000004663 powder metallurgy Methods 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract description 5
- 229910045601 alloy Inorganic materials 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 abstract description 4
- 150000002889 oleic acids Chemical class 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- PHYFQTYBJUILEZ-IUPFWZBJSA-N triolein Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(OC(=O)CCCCCCC\C=C/CCCCCCCC)COC(=O)CCCCCCC\C=C/CCCCCCCC PHYFQTYBJUILEZ-IUPFWZBJSA-N 0.000 abstract 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 18
- 229910052796 boron Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000006247 magnetic powder Substances 0.000 description 5
- 229910017052 cobalt Inorganic materials 0.000 description 4
- 239000010941 cobalt Substances 0.000 description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 4
- QYDYPVFESGNLHU-UHFFFAOYSA-N elaidic acid methyl ester Natural products CCCCCCCCC=CCCCCCCCC(=O)OC QYDYPVFESGNLHU-UHFFFAOYSA-N 0.000 description 4
- QYDYPVFESGNLHU-KHPPLWFESA-N methyl oleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC QYDYPVFESGNLHU-KHPPLWFESA-N 0.000 description 4
- 229940073769 methyl oleate Drugs 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 3
- ZDVYABSQRRRIOJ-UHFFFAOYSA-N boron;iron Chemical compound [Fe]#B ZDVYABSQRRRIOJ-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- LVGKNOAMLMIIKO-UHFFFAOYSA-N Elaidinsaeure-aethylester Natural products CCCCCCCCC=CCCCCCCCC(=O)OCC LVGKNOAMLMIIKO-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- ZCZLQYAECBEUBH-UHFFFAOYSA-L calcium;octadec-9-enoate Chemical compound [Ca+2].CCCCCCCCC=CCCCCCCCC([O-])=O.CCCCCCCCC=CCCCCCCCC([O-])=O ZCZLQYAECBEUBH-UHFFFAOYSA-L 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- LVGKNOAMLMIIKO-QXMHVHEDSA-N ethyl oleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC LVGKNOAMLMIIKO-QXMHVHEDSA-N 0.000 description 1
- 229940093471 ethyl oleate Drugs 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- AVOVSJYQRZMDQJ-KVVVOXFISA-M lithium;(z)-octadec-9-enoate Chemical compound [Li+].CCCCCCCC\C=C/CCCCCCCC([O-])=O AVOVSJYQRZMDQJ-KVVVOXFISA-M 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229940049964 oleate Drugs 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000008096 xylene Substances 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
- H01F1/057—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〕
本発明は永久磁石の製造方法に関するものであシ、さら
に詳しく述べるならば、粉末冶金法による希土類−鉄−
ホウ素系永久出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 relates to a method for manufacturing a permanent magnet, and more specifically, it relates to a method for manufacturing a permanent magnet.
The present invention relates to a method for producing boron-based permanent stone.
粉末冶金法で製造された希土類−鉄−ホウ素系永久磁石
は、高性能磁石として知られている従来の希土類−鉄−
コバルトよシも高い磁石特性を有するとともに、高価な
コ／々ルト等を必須成分とせずに、安価な工業材料であ
る鉄を多量に用いることによりて、コスト低減を実現す
る九めに、従来の永久磁石を代替する新材料としての期
待が集っている。これまで、より一層の磁石特性の向上
を図シ、よシ安価な元素を使用し、あるいは加工性を向
上する等の改良の努力がなされてきた。Rare earth iron-boron permanent magnets manufactured using powder metallurgy are different from conventional rare earth iron boron permanent magnets, which are known as high-performance magnets.
Cobalt and cobalt also have high magnetic properties, and by using a large amount of iron, an inexpensive industrial material, without using expensive cobalt or cobalt as an essential component, costs can be reduced. There are high hopes for this material as a new material that can replace permanent magnets. Until now, efforts have been made to further improve magnetic properties, such as by using cheaper elements or improving processability.
粉末冶金法による希土類−鉄−ホウ素系永久磁石はおよ
そ次のような工程によシ製造される。Rare earth-iron-boron permanent magnets are manufactured by powder metallurgy through the following process.
アーク溶解あるいは高周波溶解等で目標組成の希土類−
鉄−ホク累系合金が溶製され、インゴットとして鋳造さ
れる。インプットは粗粉砕および微粉砕され、平均粒径
が数ミクロンの微粉末とされ、その後この微粉末を乾式
＠増成型により用途に合わせた形状に成型しかつ磁性粉
末を磁場の方向に配向し、次に焼結１時効等を行なって
永久磁石とする・
ま九、乾式磁場成型の代わりに湿式磁場成型を行な゛う
ことも知られている（特開昭６１−１１４５０５号）。Rare earths of target composition by arc melting or high frequency melting, etc.
The iron-hoku alloy is melted and cast as an ingot. The input is coarsely ground and finely ground into a fine powder with an average particle size of several microns, and then this fine powder is formed into a shape suitable for the application using dry molding, and the magnetic powder is oriented in the direction of the magnetic field. Next, sintering and aging are performed to form a permanent magnet.It is also known to perform wet magnetic field forming instead of dry magnetic field forming (Japanese Patent Application Laid-Open No. 114505/1983).
この公報では、トルエン、キシレン、アルコール等の有
機溶剤によｊ５Ｎｄの酸化を防止し、ま光ステアリン酸
金属を潤滑剤として微粉末に添加した状態で希土類−鉄
−ホウ素系合金粉末のＷｉ場中成型會行ない、最大で３
６ ＭＧＯｅの（Ｂ）（）ｍａｘが得られている。In this publication, the oxidation of j5Nd is prevented using an organic solvent such as toluene, xylene, or alcohol, and a rare earth-iron-boron alloy powder is prepared in a Wi-Fi process with a luminescent metal stearate added to the fine powder as a lubricant. Molding meeting, maximum 3
(B)()max of 6 MGOe has been obtained.
上記し九乾式磁場中成型法により製造され九希土類−鉄
−ホウ素系永久磁石は、磁場中成型の効果によって、高
い磁石特性を発現するが、成型時に微粉末同士に生じる
摩擦のために所望方向への微粉末の配向度が低い、ま穴
微粉末同士に生じる摩擦のために成型体が発熱し、微粉
末の希土類元素成分の酸化が起るという欠点のために、
最大で４５ ＭＧＯ・−（ＢＨ）ｍａｘ−に達する希土
類−鉄−ホウ素系永久磁石の潜在的磁気特性よシも低い
磁気特性しか得られていない。The nine rare earth-iron-boron permanent magnets produced by the above-mentioned nine-piece magnetic field molding method exhibit high magnetic properties due to the effect of magnetic field molding, but due to the friction generated between the fine powders during molding, the magnets are directed in the desired direction. Due to the disadvantages that the degree of orientation of the fine powder is low, the molded body generates heat due to friction between the fine powder, and oxidation of the rare earth element component of the fine powder occurs.
The magnetic properties obtained are lower than the potential magnetic properties of rare earth-iron-boron permanent magnets, which reach a maximum of 45 MGO·-(BH)max-.
これに対し、公知の湿式磁場成型による粉末冶金法によ
シ得られた希土類−鉄−ホウ素系永久磁石は、乾式法の
ような微粉末同士の摩擦が激減しているので、上記のよ
うな欠点がなく、優れた磁石特性が得られるというもの
の１本発明者の研究によると、使用される潤滑剤（ステ
アリン酸塩）と希土類−鉄−ホウ素系合金との組み合わ
せに問題がありて、未だ潜在的磁気特性よシ低い磁石特
性しか得られていないという欠点があることが分かった
。On the other hand, rare earth-iron-boron permanent magnets obtained by the known powder metallurgy method using wet magnetic field molding have significantly reduced friction between fine powders as in the dry method. According to the research of the present inventor, there is a problem in the combination of the lubricant (stearate) and rare earth-iron-boron alloy, and it is said that there are no defects and excellent magnetic properties are obtained. It was found that the drawback was that the magnetic properties obtained were lower than the potential magnetic properties.
本発明者は、従来の粉末冶金法で製造される永久磁石よ
りも配向度が高く、すなわち残留磁束密度が高い希土類
−鉄−ホウ素系永久磁石を提供すべく、湿式成型におけ
る潤滑剤および溶剤につき鋭意研究した結果、本発明を
完成し次。In order to provide a rare earth-iron-boron-based permanent magnet with a higher degree of orientation, that is, a higher residual magnetic flux density than permanent magnets manufactured by conventional powder metallurgy, the present inventors have investigated the use of lubricants and solvents in wet molding. As a result of intensive research, we completed the present invention.
即ち１本発明は、希土類−鉄一ホ９素系合金の粉末に潤
滑剤および有機溶剤を均一に混合し、混合粉末を磁場中
で成型し、焼結し、時効する永久磁石の製造方法におい
て、前記潤滑剤にオレイン酸およびオレイン酸化合物の
少なくとも一種を用いることを特徴とする。That is, 1. The present invention provides a method for producing a permanent magnet in which a lubricant and an organic solvent are uniformly mixed into powder of a rare earth-iron-pho9-based alloy, the mixed powder is molded in a magnetic field, sintered, and aged. , the lubricant is characterized in that at least one of oleic acid and oleic acid compounds is used.
以下、本発明の構成を詳しく説明する。Hereinafter, the configuration of the present invention will be explained in detail.
本発明において、希土類−鉄−ホウ素系合金の粉末の絹
製方法、ならびに焼結、時効方法は何等制限がなく、ま
九公知の方法と同じである。In the present invention, the method for producing rare earth-iron-boron alloy powder, as well as the sintering and aging methods are not limited in any way and are the same as known methods.
本発明の特徴は、磁場中成型工程で使用されるところの
、主として微粉末の流動性と配向性を高める潤滑剤、お
よび主として潤滑剤を一様に分散させるとともに微粉末
へ作用し易くする溶剤の化合物にある。潤滑剤として使
用されるオレイン酸およびオレイン酸化合物は希土類−
鉄−ホウ素系合金粉末成型時の粉末粒子同士の摩擦を顕
著に低減して、その配向性を高める。オレイン酸化合物
としては、オレイン酸メチル、オレイン酸エチルなどの
オレイン酸アルキル化合物、オレイン酸リチウム、オレ
イン酸カルシウムなどのオレイン酸塩が好ましい。オレ
イン酸およびオレイン酸化合物の添加量は極〈微量でも
効果がＴｏシ、例えば、磁場中成型される微粉末の重量
を１００として０．００１ないし０．５重量−の範囲内
にあることが好ましい。その添加量が０．００１重量−
未満であると潤滑改善効果が少なく、一方０．５重量％
を越えると有機物が残存して磁石に悪影響を及ぼすよう
になるため、上記範囲内の添加量が好ましい。オレイン
酸およびオレイン酸化合物のよシ好ましい添加量は、０
．００２ないし０．２重量％である。溶媒としては、一
般に使用されているトルエンを用いることができるが、
オレイン酸およびオレイン酸化合物が微粉末単粒子の周
シに均一被膜を形成する有機化合物を溶剤として使用す
ることが望ましい。The present invention is characterized by a lubricant used in the magnetic field molding process that mainly improves the fluidity and orientation of fine powder, and a solvent that mainly disperses the lubricant uniformly and makes it easier to act on the fine powder. It is found in the compound of Oleic acid and oleic acid compounds used as lubricants are rare earth-
Significantly reduces friction between powder particles during molding of iron-boron alloy powder and improves its orientation. The oleic acid compound is preferably an alkyl oleate compound such as methyl oleate or ethyl oleate, or an oleate salt such as lithium oleate or calcium oleate. The amount of oleic acid and oleic acid compound added is preferably within the range of 0.001 to 0.5 weight, where even a very small amount is effective; for example, the weight of the fine powder to be molded in a magnetic field is 100. . The amount added is 0.001 weight -
If it is less than 0.5% by weight, the lubrication improvement effect will be small;
If the amount exceeds this range, the organic matter will remain and will have a negative effect on the magnet, so it is preferable to add the amount within the above range. A more preferable addition amount of oleic acid and oleic acid compounds is 0
．． 0.002 to 0.2% by weight. As a solvent, commonly used toluene can be used, but
It is desirable to use an organic compound in which oleic acid and an oleic acid compound form a uniform film around the fine powder single particles as the solvent.
そのような化合物としては、トリクロロエタンなどのハ
ロゲン化炭化木葉、フレオン、グイフロンなどの商品名
で著名なフルオロ炭化木葉などの１い。溶剤の量が１倍
未満であると、十分に微粉末および潤滑剤が微細分散さ
れず一１７’ｕ２倍を越えると、最終特性に及ぼす効果
が一定になシ、脱溶剤の点から取扱いが面倒となる。Examples of such compounds include halogenated carbonized tree leaves such as trichloroethane, and fluorocarbonized tree leaves, which are well-known under trade names such as freon and guifuron. If the amount of solvent is less than 1 times, the fine powder and lubricant will not be sufficiently finely dispersed, and if it exceeds 1 times the amount, the effect on the final properties will not be constant, and handling will be difficult from the point of view of solvent removal. It becomes troublesome.
上記した潤滑剤および溶剤を用いて磁性微粉末を湿式成
型する際のＶ＆場の強度は７ ｋＧ〜２０ｋＧの範囲が
一般的に使用される。ま次、成型圧力は５００〜４００
０ ｋｃＩ／／ｃｍ”の範囲が一般的に使用される。When wet-molding magnetic fine powder using the above-mentioned lubricant and solvent, the strength of the V& field is generally in the range of 7 kG to 20 kG. Next, the molding pressure is 500-400
A range of 0 kcI//cm'' is commonly used.
上記した潤滑剤、溶剤および磁性微粉末のスラリーを金
型に充填し、成型し、溶剤等の液体を排出した後、成型
体を金型から取り出し、自然乾燥させ、続いて焼結を行
なう。焼結は希土類元轟化を防止するため真空中あるい
は不活性ガス中で行なわれる。この際に成型体内の有機
物は飛散、燃焼され、製品中には痕跡量しか残存しない
。A mold is filled with a slurry of the above-described lubricant, solvent, and magnetic fine powder, molded, and after draining the solvent and other liquids, the molded body is taken out of the mold, air-dried, and then sintered. Sintering is carried out in vacuum or in an inert gas to prevent rare earth elements from decomposing. At this time, the organic matter in the molded body is scattered and burned, leaving only a trace amount in the product.
以下、実施例によシ本発明をさらに詳しく説明する・
〔実施例〕
実施例ｌ
Ｎｄ１５Ｆｅ７７ＢＢなる組成の合金を高周波炉で溶製
し、造塊し得られたインゴットを粗粉砕した後、ジェッ
トミルを用いて平均粒径３．５μｍの磁性粉末に微粉砕
した。この磁性粉末に、粉末重量に対して０．０５ ｖ
ｔＪのオレイン酸メチルを溶解した１、１．１−）リク
ロロエタン（磁性粉末の体積に対し１．５倍のトリクロ
ロエタン）を添加し、全配合物をスターラーにて混合し
、スラリー状の磁性粉末とした。これを、１０ＫＯｅの
磁場中で、１．５ｔｏｎ／ｍ”の圧力で圧粉した後、自
然乾燥し、トリクロロエタンを飛散させた。その後にガ
ス雰囲気中で１１００℃、２時間の焼結を行ない、続い
て、６００℃、１時間の時効処理を行なった。このよう
にして調製し九永久磁石（寸法２０ ｗ Ｘ １８■Ｘ
１４鴎）を試料１とする。Hereinafter, the present invention will be explained in more detail with reference to Examples. [Example] Example 1 An alloy having a composition of Nd15Fe77BB was melted in a high frequency furnace, and the resulting ingot was roughly pulverized, followed by a jet mill. The powder was pulverized into magnetic powder with an average particle size of 3.5 μm. To this magnetic powder, apply 0.05 v to the powder weight.
1,1.1-)lichloroethane in which tJ of methyl oleate was dissolved (trichloroethane 1.5 times the volume of the magnetic powder) was added, and the entire mixture was mixed with a stirrer to form a slurry of magnetic powder. And so. This was pressed into powder at a pressure of 1.5 ton/m" in a magnetic field of 10 KOe, and then air-dried to scatter trichloroethane. Thereafter, sintering was performed at 1100°C for 2 hours in a gas atmosphere. Subsequently, aging treatment was performed at 600°C for 1 hour.Nine permanent magnets (dimensions: 20 w x 18 x
14) is designated as sample 1.
本発明の湿式成凰法を乾式成凰法と比較するために乾式
成製した他は上記試料１と同一条件で永久磁石を調製し
九（試料２）。In order to compare the wet forming method of the present invention with the dry forming method, a permanent magnet was prepared under the same conditions as Sample 1 except that dry forming was performed (Sample 2).
さらに、本発明の湿式成凰法を、従来の潤滑剤と溶剤を
使用した湿式成型法と比較するために、粉末重量に対し
て０．０５ｗｔ％のステアリン酸カルシウムを溶解した
トルエンを添加（粉末の体積に対し体積で１．５倍のト
ルエン）した溶液を使用してスターラーにて混合した他
は試料１と同じ条件で、成形、乾燥を行ない、トルエン
を飛散し、さらに同条件で焼結１時効を行なった永久磁
石を試料３とした。Furthermore, in order to compare the wet molding method of the present invention with the conventional wet molding method using a lubricant and solvent, toluene in which 0.05 wt% calcium stearate was dissolved based on the powder weight was added ( Molding and drying were performed under the same conditions as Sample 1, except that a solution containing 1.5 times the volume of toluene (volume to volume) was used and mixed with a stirrer, and the toluene was scattered. The aged permanent magnet was designated as Sample 3.
次表は得られた永久磁石１０個の磁気特性の測定結果の
平均値を示すものである。The following table shows the average values of the results of measuring the magnetic properties of the ten obtained permanent magnets.
以下余白
表１よシ、オレイン酸メチルを潤滑剤Ｎリクロロエタン
を溶媒として湿式成型して得られた永久磁石の特性は、
従来より知られている湿式成型や乾式成型によりて得ら
れる永久磁石の特性よシも、極めて優れている事がわか
る。特に、０３Ｈ）親で４０ＭＧＯ・を越える極めて優
れた磁石特性が得られたことく注目される。As shown in Table 1 below, the properties of a permanent magnet obtained by wet molding methyl oleate using the lubricant N-lichloroethane as a solvent are as follows:
It can be seen that the properties of permanent magnets obtained by conventional wet molding and dry molding are also extremely superior. In particular, the 03H) parent attracted attention because extremely excellent magnetic properties exceeding 40MGO were obtained.
実施例２
実施例１と同じ組成の磁石粉末と、次表に示すような有
機溶媒および潤滑剤を用い、実施例１と同様な方法によ
シ永久磁石を作製した。Example 2 A permanent magnet was produced in the same manner as in Example 1 using magnet powder having the same composition as in Example 1, and the organic solvent and lubricant shown in the following table.
以下余白
得られた磁石の磁気特性を測定したところ、下表の結果
が得られた。When the magnetic properties of the obtained magnet were measured, the results shown in the table below were obtained.
表 ３
表１よυ、オレイン酸またはオレイン酸化合物と、フレ
オン、ハロゲン化炭化水素との組み合わせは、オレイン
酸メチルとトルエンの組み合わせよりも、磁石特性上好
ましいことがわかる。Table 3 From Table 1, it can be seen that the combination of oleic acid or oleic acid compound, freon, or halogenated hydrocarbon is more preferable in terms of magnetic properties than the combination of methyl oleate and toluene.
以上説明したように、本発明によると、 ４０ＭＧＯｅ
に近い最大エネルギ積密度（ＢＨ）ｍａｗが得られる。As explained above, according to the present invention, 40MGOe
A maximum energy density (BH) maw close to is obtained.
従来このような最大エネルギ積密度（ＢＥ）ｗａｘを得
るための方法は具体的に知られていなか−５たが、本発
明によ〕容易にλ手回能な有機化合物を使用し、しかも
通常の粉末冶金法条件によシ、優れた磁石特性を達成し
たことの工業的意義は極めて大である。Conventionally, a method for obtaining such a maximum energy bulk density (BE) wax was not specifically known. The industrial significance of achieving excellent magnetic properties under the powder metallurgy process conditions is extremely large.
Claims (1)
機溶剤を均一に混合し、混合粉末を磁場中で成型し、焼
結し、時効する永久磁石の製造方法において、前記潤滑
剤にオレイン酸およびオレイン酸化合物の少なくとも一
種を用いることを特徴とする永久磁石の製造方法。 ２、前記有機溶剤にハロゲン化炭化水素およびフルオロ
炭化水素の１種以上を用いることを特徴とする特許請求
の範囲第１項記載の永久磁石の製造方法。[Claims] 1. A method for producing a permanent magnet, which involves uniformly mixing rare earth-iron-boron alloy powder with a lubricant and an organic solvent, molding the mixed powder in a magnetic field, sintering it, and aging it. . A method for producing a permanent magnet, characterized in that the lubricant is at least one of oleic acid and an oleic acid compound. 2. The method for producing a permanent magnet according to claim 1, characterized in that the organic solvent is one or more of halogenated hydrocarbons and fluorohydrocarbons.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61284406A JPS63138706A (en) | 1986-12-01 | 1986-12-01 | Manufacture of permanent magnet |
| KR1019860010840A KR910000386B1 (en) | 1985-12-18 | 1986-12-17 | Semiconductor memory device with reset signal generating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61284406A JPS63138706A (en) | 1986-12-01 | 1986-12-01 | Manufacture of permanent magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63138706A true JPS63138706A (en) | 1988-06-10 |
Family
ID=17678155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61284406A Pending JPS63138706A (en) | 1985-12-18 | 1986-12-01 | Manufacture of permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63138706A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5486224A (en) * | 1993-12-28 | 1996-01-23 | Sumitomo Metal Industries, Ltd. | Powder mixture for use in compaction to produce rare earth iron sintered permanent magnets |
| JP2007533858A (en) * | 2004-04-21 | 2007-11-22 | ホガナス アクチボラゲット | Lubricant-containing molded product manufacturing method and lubricant-containing iron-based powder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58108709A (en) * | 1981-12-23 | 1983-06-28 | Tohoku Metal Ind Ltd | Manufacture of rare earth permanent magnet |
-
1986
- 1986-12-01 JP JP61284406A patent/JPS63138706A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58108709A (en) * | 1981-12-23 | 1983-06-28 | Tohoku Metal Ind Ltd | Manufacture of rare earth permanent magnet |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5486224A (en) * | 1993-12-28 | 1996-01-23 | Sumitomo Metal Industries, Ltd. | Powder mixture for use in compaction to produce rare earth iron sintered permanent magnets |
| US5527504A (en) * | 1993-12-28 | 1996-06-18 | Sumitomo Metal Industries, Ltd. | Powder mixture for use in compaction to produce rare earth iron sintered permanent magnets |
| CN1045680C (en) * | 1993-12-28 | 1999-10-13 | 住友金属工业株式会社 | Production of and material for forming rare earth, iron based sintering permanent magnet |
| JP2007533858A (en) * | 2004-04-21 | 2007-11-22 | ホガナス アクチボラゲット | Lubricant-containing molded product manufacturing method and lubricant-containing iron-based powder |
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