JPH03218605A - Manufacture of hot plastic deformation magnet - Google Patents
Manufacture of hot plastic deformation magnetInfo
- Publication number
- JPH03218605A JPH03218605A JP2013962A JP1396290A JPH03218605A JP H03218605 A JPH03218605 A JP H03218605A JP 2013962 A JP2013962 A JP 2013962A JP 1396290 A JP1396290 A JP 1396290A JP H03218605 A JPH03218605 A JP H03218605A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- permanent magnet
- punch
- plastic deformation
- metal mold
- 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 4
- 239000000843 powder Substances 0.000 claims abstract description 12
- 229910000521 B alloy Inorganic materials 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 abstract description 11
- 229910052582 BN Inorganic materials 0.000 abstract description 5
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 239000011521 glass Substances 0.000 abstract description 2
- 239000003960 organic solvent Substances 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract 4
- 238000004299 exfoliation Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000000314 lubricant Substances 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- ZDVYABSQRRRIOJ-UHFFFAOYSA-N boron;iron Chemical compound [Fe]#B ZDVYABSQRRRIOJ-UHFFFAOYSA-N 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000003466 welding 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
- H01F1/057—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
- H01F1/0576—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 pressed, e.g. hot working
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は希土類一鉄−ボロン系の異方性熱間塑性変形磁
石の製造方法におけるａｍ．剥離に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an am. It concerns peeling.
［従来の技術及びその課題］
近年Ｎｄ２Ｅｅ１４Ｂ系金属間化合物に永久磁石として
高磁気特性が得られることが知られ、そのエネルギー積
は５０８ＧＯｅにも達している。この磁石合金の製造方
法は大別して３通りあり、その１つは粉末冶金法による
焼結法、そして超急冷法及び鋳造法がある。超急冷法及
び鋳造法は磁気異方性化する場合、熱間において塑性変
形しなければならない。しかしながらその際永久磁石体
とパンチ及び金型接触面との間において摩擦力が発生す
るため、塑性変形時における流動性が悪く円滑に塑性変
形加工が行えないのが現状であった。そのため磁気的配
向が行ないにくく、亀裂や耳割れ等を起こすこともしば
しばあり、また５００℃以上の熱間加工のために永久磁
石と金型が溶看してしまう欠点があった。[Prior art and its problems] In recent years, it has been known that Nd2Ee14B-based intermetallic compounds can be used as permanent magnets with high magnetic properties, and their energy product has reached as much as 508 GOe. There are three methods for producing this magnetic alloy, one of which is a sintering method using a powder metallurgy method, an ultra-quenching method, and a casting method. In the ultra-quenching method and the casting method, plastic deformation must occur in hot conditions when magnetic anisotropy is to be achieved. However, at this time, frictional force is generated between the permanent magnet body and the contact surface of the punch and mold, so that the fluidity during plastic deformation is poor and smooth plastic deformation cannot be performed. Therefore, it is difficult to achieve magnetic orientation, often causing cracks and edge cracks, and there is also the drawback that the permanent magnet and the mold melt due to hot working at 500° C. or higher.
本発明はこの点を鑑みて、希土類一鉄−ボロン系磁石合
金の塑性変形加工磁石製造における永久磁石体とパンチ
及び金型との潤滑性．剥離性の向上を計ることを目的と
する。In view of this point, the present invention improves the lubricity between the permanent magnet body and the punch and die in the production of plastically deformed magnets of rare earth iron-boron magnet alloys. The purpose is to improve removability.
［課題を解決するための手段］
本発明は希土類一鉄−ボロン系合金を熱間塑性変形によ
り磁気異方性を有する永久磁石に形成する方法において
、永久磁石体とパンチ及び金型接触面間にＢＮ（窒化ボ
ロン）粉末を配するものであり、ＢＮ粉末を永久磁石体
とバンチ及び金型とのＩｌｌＷＩ剤．剥離剤として使用
することである。ＢＮとしては粉末を有機溶剤に溶かし
て塗布したり、スプレー式を採用し、ガラス粉．カーボ
ン粉と混合し使用しても効果的である。粒度は５Ｉｓ以
下であり、好ましくは２膚以下が良い。[Means for Solving the Problems] The present invention provides a method for forming a rare earth iron-boron alloy into a permanent magnet having magnetic anisotropy by hot plastic deformation. BN (boron nitride) powder is applied to the permanent magnet body, the bunch, and the mold as an IllWI agent. It is used as a stripping agent. BN can be applied by dissolving the powder in an organic solvent, or by using a spray method, or by applying glass powder. It is also effective when mixed with carbon powder. The particle size is 5Is or less, preferably 2Is or less.
〔実施例］
Ｎｄ［Ｆｅ Ｂ ］ 合金をアーク溶解に
０．９３ ０．０７ ６．２
より溶融し、このインゴットを石英で作られた噴出管に
入れ、アルゴン雰囲気中で高周波誘導加熱を用い溶解し
、周速度２０■／ｓｅｃの銅ロールに噴出させ薄帯を得
る。この薄帯を約１００虜に粉砕し、カーボン金型によ
り真空中，７２０℃．１．５ｔｏｎ／ｃａｌを加え等方
性ブロックを得た。このブロック１に第１図に示すよう
に粒度０．３ＲのＢＮ粉末２を上下面に塗布したものと
、しないものをそれぞれ超硬上下パンチ３により真空中
７２０℃． ０．５ｔｏｎで押込み熱間塑性変形加工を
施した。その結果、本発明では永久磁石体を取出す際・
に剥がれは皆無であったが、比較例では永久磁石体を取
出す際に超硬バンチと溶看してい塑性変形加工率及び磁
気特性においても本発明は効果的であることがわかる。[Example] Nd[FeB] alloy was melted by arc melting from 0.93 to 0.07 to 6.2, and the ingot was put into a jet tube made of quartz and melted using high-frequency induction heating in an argon atmosphere. Then, it is ejected onto a copper roll at a circumferential speed of 20 cm/sec to obtain a thin ribbon. This thin ribbon was crushed into approximately 100 pieces and heated at 720°C in vacuum using a carbon mold. An isotropic block was obtained by adding 1.5 ton/cal. As shown in FIG. 1, this block 1 was coated with BN powder 2 having a grain size of 0.3R on the top and bottom surfaces, and one without, and the block 1 was heated at 720°C in vacuum using a carbide upper and lower punch 3. Indentation hot plastic deformation was performed using 0.5 ton. As a result, in the present invention, when removing the permanent magnet body,
Although there was no peeling at all, in the comparative example, when the permanent magnet body was taken out, it was seen as a cemented carbide bunch, and it can be seen that the present invention is effective also in terms of plastic deformation processing rate and magnetic properties.
［発明の効果］
本発明によれば希土類一鉄−ボロン系合金の塑性変形加
工磁石製造における潤滑性、作成された磁石体の面粗さ
の向上、永久磁石体と金型との溶着の防止を計ることが
できるため少ない加重で変形ができ、永久磁石の割れ．
欠け，剥離のない高磁気特性を得ることが可能となり、
超偏平の磁石やリング状の磁石において特に有効である
。[Effects of the Invention] According to the present invention, the lubricity in the production of plastically deformed rare earth iron-boron alloy magnets, the improvement of the surface roughness of the produced magnet body, and the prevention of welding between the permanent magnet body and the mold. Since it can measure the deformation with less load, it can prevent cracking of permanent magnets.
It is possible to obtain high magnetic properties without chipping or peeling,
This is particularly effective for ultra-flat magnets and ring-shaped magnets.
第１図は本発明を実施するための概略図。 １：ブロック ２：１３ Ｎ粉末３：パンチ FIG. 1 is a schematic diagram for implementing the present invention. 1: Block 2: 13 N powder 3: Punch
Claims (1)
めの熱間塑性変形時において、永久磁石体とパンチ及び
金型接触面間にＢＮ粉末を配することを特徴とした熱間
塑性変形磁石の製造方法。Hot plastic deformation characterized by disposing BN powder between the permanent magnet body and the punch and mold contact surfaces during hot plastic deformation to make a rare earth-iron-boron alloy into a magnetically anisotropic magnet. How to manufacture magnets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013962A JPH03218605A (en) | 1990-01-24 | 1990-01-24 | Manufacture of hot plastic deformation magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013962A JPH03218605A (en) | 1990-01-24 | 1990-01-24 | Manufacture of hot plastic deformation magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03218605A true JPH03218605A (en) | 1991-09-26 |
Family
ID=11847837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2013962A Pending JPH03218605A (en) | 1990-01-24 | 1990-01-24 | Manufacture of hot plastic deformation magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03218605A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5707640A (en) * | 1993-09-20 | 1998-01-13 | Nihon Bayer Agrochem K.K. | Poisonous baits for controlling soil-inhabiting pests |
| WO2006025430A1 (en) * | 2004-09-01 | 2006-03-09 | Sumitomo Electric Industries, Ltd. | Soft magnetic material, dust core and method for producing dust core |
| CN112661404A (en) * | 2020-11-27 | 2021-04-16 | 宿迁学院 | Preparation method of hot-melt glass with patterns on surface |
-
1990
- 1990-01-24 JP JP2013962A patent/JPH03218605A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5707640A (en) * | 1993-09-20 | 1998-01-13 | Nihon Bayer Agrochem K.K. | Poisonous baits for controlling soil-inhabiting pests |
| WO2006025430A1 (en) * | 2004-09-01 | 2006-03-09 | Sumitomo Electric Industries, Ltd. | Soft magnetic material, dust core and method for producing dust core |
| US7678174B2 (en) | 2004-09-01 | 2010-03-16 | Sumitomo Electric Industries, Ltd. | Soft magnetic material, compressed powder magnetic core and method for producing compressed power magnetic core |
| CN112661404A (en) * | 2020-11-27 | 2021-04-16 | 宿迁学院 | Preparation method of hot-melt glass with patterns on surface |
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