JPS62247056A - Manufacture of manganese-aluminum-carbon alloy magnet - Google Patents
Manufacture of manganese-aluminum-carbon alloy magnetInfo
- Publication number
- JPS62247056A JPS62247056A JP8855686A JP8855686A JPS62247056A JP S62247056 A JPS62247056 A JP S62247056A JP 8855686 A JP8855686 A JP 8855686A JP 8855686 A JP8855686 A JP 8855686A JP S62247056 A JPS62247056 A JP S62247056A
- Authority
- JP
- Japan
- Prior art keywords
- billet
- magnet
- axial direction
- compressive strain
- processing
- 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
- 229910001339 C alloy Inorganic materials 0.000 title claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- -1 manganese-aluminum-carbon Chemical compound 0.000 title claims 6
- 238000007906 compression Methods 0.000 claims abstract description 62
- 230000006835 compression Effects 0.000 claims abstract description 54
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 15
- 239000000956 alloy Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 34
- 230000005291 magnetic effect Effects 0.000 abstract description 29
- 230000002093 peripheral effect Effects 0.000 abstract description 22
- 230000005415 magnetization Effects 0.000 abstract description 18
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 229910001004 magnetic alloy Inorganic materials 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 22
- 238000005520 cutting process Methods 0.000 description 14
- 239000000203 mixture Substances 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 9
- 239000000314 lubricant Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 230000005405 multipole Effects 0.000 description 3
- 230000000452 restraining effect Effects 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002362 mulch Substances 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、永久磁石の製造法に係り、とくに−結晶マン
ガン−アルミニウム−炭素（Ｍｎ −Ａｇ−Ｃ）系合金
磁石による多極着磁用Ｍｎ−ＡＩＬｃ系合金磁石の製造
法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing permanent magnets, and in particular to a method for producing permanent magnets, particularly Mn- The present invention relates to a method for manufacturing an AILc alloy magnet.
従来の技術
Ｍｎ −４１−Ｃ系磁石用合金は、６８〜７３質量係（
以下単にチで表わす）のＭｎと（１／１ｏＭｎ−ｅ、ｅ
） 〜（１／３Ｍｎ−２２，２）ｔ４ のＣと残部のム
ｅからなり、不純物以外に添加元素を含まない３元系及
び少量の添加元素を含む４元系以上の多元系磁石用合金
が知られており、これらを総称するものである。同様に
、Ｍｎ−ムｌ−Ｃ系合金磁石は、主として強磁性相であ
る面心正方晶（τ相、Ｌ１０型規則格子）の組織で構成
され、Ｃを必須構成元素として含むものであり、不純物
以外に添加元素を含まない３元系及び少量の添加元素を
含む４元系以上の多元系合金磁石が知られており、これ
らを総称するものである。Conventional technology Mn-41-C alloy for magnets has a mass coefficient of 68 to 73 (
Mn (hereinafter simply expressed as CH) and (1/1oMn-e, e
) ~ (1/3Mn-22,2)t4 A multi-component alloy for magnets consisting of C in t4 and the balance e, including ternary systems containing no additional elements other than impurities, and quaternary or higher alloys containing small amounts of additional elements. are known, and these are collectively called. Similarly, the Mn-Ml-C alloy magnet is mainly composed of a face-centered tetragonal (τ phase, L10 type regular lattice) structure, which is a ferromagnetic phase, and contains C as an essential constituent element. Multi-component alloy magnets are known, including ternary alloy magnets that do not contain any additive elements other than impurities, and quaternary or higher alloy magnets that contain a small amount of additive elements.
その製造法としては、鋳造・熱処理によるもの以外に押
出加工等の塑性加工工程を含むものが知られている。特
に後者は、高い磁気特性１機械的強度、耐候性１機械加
工性等の優れた性質を有する異方性磁石の製造法として
知られている。As for the manufacturing method, there are known methods including plastic working steps such as extrusion processing in addition to those using casting and heat treatment. In particular, the latter method is known as a method for producing anisotropic magnets having excellent properties such as high magnetic properties, mechanical strength, weather resistance, and machinability.
また、Ｍｎ−Ａｄ−Ｃ系磁石用合金を用いた多極着磁用
合金磁石の製造法としては、等方性磁石、圧縮加工によ
るもの（特許第１０１１４７３号）、及びＭｎ−人６−
ｃ系磁石用合金からなる中空体状のビレットに特定の圧
縮加工を施すもの（特開昭５８−１９２３０３号公報）
が知られている。In addition, methods for producing multipolar magnetized alloy magnets using Mn-Ad-C based magnet alloys include isotropic magnets, compression processing (Patent No. 1011473), and Mn-Man 6-
A hollow billet made of a C-based magnet alloy subjected to a specific compression process (Japanese Patent Application Laid-Open No. 192303/1983)
It has been known.
発明が解決しようとする問題点
前述したＭｎ−人ｌ−Ｇ系磁石用合金からなる中空体状
のビレットに特定の圧縮加工を施すもの（特に、特開昭
５８−１９２３０３号公報）では、つまり、Ｍｎ−ムｌ
−１系磁石用合金からなる中空体状のビレットに、少な
くともビレットの外周および内周の一部分を自由にした
状態で、ビレットの軸方向に圧縮加工を施す方法では、
得られた磁石は径方向に磁化容易方向を有する。この異
方性構造は外周あるいは内周面に多極着磁して用いるの
に必ずしも望ましい異方性構造ではない。Problems to be Solved by the Invention In the above-mentioned method in which a hollow billet made of an Mn-G magnet alloy is subjected to a specific compression process (in particular, Japanese Patent Laid-Open No. 192303/1983), , Mn-mul
- A method in which a hollow billet made of an alloy for magnets of the -1 series is compressed in the axial direction of the billet with at least a portion of the outer circumference and inner circumference of the billet free.
The resulting magnet has an easy magnetization direction in the radial direction. This anisotropic structure is not necessarily a desirable anisotropic structure for use with multipolar magnetization on the outer or inner circumferential surface.
問題点を解決するための手段
以上述べてきた問題点を解決するために本発明は、Ｍｎ
−ムｌ−Ｃ系磁石用合金からなる中空体状のビレットに
、少なくともビレットの外周および内周の一部分を自由
にした状態で、ビレ・ストの外周部の圧縮ひずみが内周
部の圧縮ひずみより小さくなるようにビレットの軸方向
に圧縮加工を施すものである。Means for Solving the Problems In order to solve the problems described above, the present invention provides Mn
- In a hollow billet made of an alloy for Ml-C magnets, with at least a portion of the outer and inner circumferences of the billet free, the compressive strain on the outer circumference of the billet is equal to the compressive strain on the inner circumference. The billet is compressed in the axial direction to make it smaller.
作用
前述した方法によって、つまシ前述した特定の圧縮加工
において、ビレットの外周部の圧縮ひずみが内周部の圧
縮ひずみより小さくなるようにビレットの軸方向に圧縮
加工を施すことによって、これまでの公知の特定の圧縮
加工を施す方法と異なり、磁石の内周部では径方向に磁
化容易方向を有し、外周部では周方向に磁化容易方向を
有する。Effect: In the above-mentioned specific compression process, the compression process is performed in the axial direction of the billet so that the compression strain on the outer circumference of the billet is smaller than the compression strain on the inner circumference. Unlike known specific compression processing methods, the inner circumferential portion of the magnet has an easy magnetization direction in the radial direction, and the outer circumferential portion has an easy magnetization direction in the circumferential direction.
実施例
本発明は、Ｍｎ−ムｌ−Ｃ系磁石用合金からなる中空体
状のビレットに、８３０〜８３０℃の温度で、少なくと
もビレットの外周および内周の一部分を自由にした状態
で、ビレットの外周部の圧縮ひずみが内周部の圧縮ひず
みより小さくなるようＶ ＋／ ＋７１． にの１市嘴
而ｊ笛畠欠力ＴＩＴル→廂す東部でも入へ本発明の製造
法の大部分は、前記の公知技術（特開昭５８−１９２３
０３号公報）と同様である。EXAMPLE The present invention is a hollow billet made of an Mn-Ml-C alloy for magnets. V +/ +71. so that the compressive strain at the outer circumference is smaller than the compressive strain at the inner circumference. Most of the manufacturing method of the present invention is based on the above-mentioned known technology (Japanese Unexamined Patent Publication No. 58-1923).
This is the same as Publication No. 03).
前記公知技術の圧縮加工は、少なくともビレットの外周
および内周の一部分を自由にした状態で、ビレットの軸
方向に圧縮加工を施すものである。In the compression processing of the known technique, compression processing is performed in the axial direction of the billet with at least a portion of the outer periphery and inner periphery of the billet free.
一方、本発明の圧縮加工は前記の圧縮加工において、さ
らにビレットの外周部の圧縮ひずみが内周部の圧縮ひず
みより小さくなるようにビレットの軸方向に圧縮加工を
施すものである。On the other hand, in the compression processing of the present invention, in addition to the compression processing described above, compression processing is further performed in the axial direction of the billet so that the compression strain at the outer circumference of the billet is smaller than the compression strain at the inner circumference.
この圧縮加工の具体的な例を以下に示す。まず第１の方
法は、円筒ビレットの軸方向に第１図に示したポンチ２
．３よシなる金型を用いて自由圧縮加工を施す方法であ
る。第１図はａに加工前の状態の断面を示す。１はビレ
ット、２，３はポンチである。第１図乙に示すように、
前記公知技術と異なる点は、ポンチ２およびポンチ３の
ビレットと接触する面（ポンチ端面）が平面ではなく傾
斜面であることである。このポンチ２およびポンチ３を
用いて、ビレット１の軸方向に加圧することによって、
ビレット１は軸方向に圧縮加工されて第１図すに示す状
態になる。第１図すに示したように圧縮加工後のビレッ
ト１の外周部の高さは内周部の高さより高い。つまり、
ビレット１の外周部の圧縮ひずみが内周部の圧縮ひずみ
より小さくなるようにビレット１の軸方向に圧縮加工を
施したことになる。圧縮ひずみとは、ビレット１の軸方
向のひずみをいう。A specific example of this compression process is shown below. The first method is to punch the punch 2 shown in Figure 1 in the axial direction of the cylindrical billet.
．． This is a method of performing free compression processing using three different molds. In FIG. 1, a shows a cross section before processing. 1 is billet, 2 and 3 are punch. As shown in Figure 1 B,
The difference from the prior art is that the surfaces of punches 2 and 3 that contact the billet (punch end surfaces) are not flat surfaces but sloped surfaces. By applying pressure to the billet 1 in the axial direction using the punches 2 and 3,
The billet 1 is axially compressed into the state shown in FIG. As shown in FIG. 1, the height of the outer periphery of the billet 1 after compression processing is higher than the height of the inner periphery. In other words,
This means that the billet 1 is compressed in the axial direction so that the compressive strain on the outer circumferential portion of the billet 1 is smaller than the compressive strain on the inner circumferential portion. Compressive strain refers to strain in the axial direction of billet 1.
第１の方法の別の圧縮加工の例をビレット１の断面形状
をリング状として説明すると、第２図ａに第１図と同様
に加工前の状態の断面を示す。第２図ａに示すように第
１図と異なる点は、ポンチ２およびポンチ３のポンチ端
面は平面であり、圧縮加工前のビレット１の外周部の高
さが内周部の高さより小さいことである。第２図すに加
工後の状態を示す。加工後のビレット１はほぼ円筒体状
となり、ビレット１の外周部の高さと内周部の高さはほ
ぼ一致する。この場合も同様に、ビレット１の外周部の
圧縮ひずみが内周部の圧縮ひずみより小さくなるように
ビレット１の軸方向に圧縮加工を施したことになる。Another compression processing example of the first method will be described assuming that the billet 1 has a ring-shaped cross-section. FIG. 2a shows a cross-section of the billet before processing, similar to FIG. 1. As shown in Fig. 2a, the difference from Fig. 1 is that the punch end faces of punches 2 and 3 are flat, and the height of the outer circumference of billet 1 before compression processing is smaller than the height of the inner circumference. It is. Figure 2 shows the state after processing. After processing, the billet 1 has a substantially cylindrical shape, and the height of the outer circumferential portion of the billet 1 and the height of the inner circumferential portion of the billet 1 substantially match. In this case as well, the billet 1 is compressed in the axial direction so that the compressive strain on the outer circumferential portion of the billet 1 is smaller than the compressive strain on the inner circumferential portion.
第２の方法は、第１の方法で得た、圧縮加工を施したビ
レット１の一部分に軸方向に圧縮加工を施す方法であり
、この方法は前記公知技術と同じである。The second method is a method in which a portion of the compressed billet 1 obtained in the first method is subjected to compression processing in the axial direction, and this method is the same as the above-mentioned known technique.
第３の方法は、ビレット１の外周部の圧縮ひずみが内周
部の圧縮ひずみより小さくなるようにビレット１の軸方
向に自由圧縮加工（圧縮加工１）を施した後、ビレット
１の外周を拘束した状態で、しかも内周を自由にした状
態で、ビレット１の軸方向に圧縮加工（圧縮加工２）す
る方法で、この一連の圧縮加工の一例を第３図に示す。The third method is to perform free compression processing (compression processing 1) in the axial direction of the billet 1 so that the compression strain on the outer circumference of the billet 1 is smaller than the compression strain on the inner circumference, and then the outer circumference of the billet 1 is An example of this series of compression processing is shown in FIG. 3, in which the billet 1 is compressed in the axial direction (compression processing 2) in a restrained state but with the inner periphery free.
第３図はａに加工前の状態の断面を示す。１はビレット
、２．３はポンチ、４は外型である。第３図ａに示すよ
うに、前記公知技術と異なる点は、ポンチ２およびポン
チ３のポンチ端面が平面ではなく傾斜面であることであ
る。このポンチ２．３を用いて、ビレット１の軸方向に
加圧することによって、ビ、レット１は軸方向に圧縮加
工されて第１図すに示す状態（圧縮加工１終了）になり
、更に圧縮加工を行なうと第３図Ｃに示したようになる
。圧縮加工後のビレット１の外周部の高さは内周部の高
さより大きい。つまり、この場合もビレット１の外周部
の圧縮ひずみが内周部の圧縮ひずみより小さくなるよう
にビレット１の軸方向に圧縮加工を施したことになる。In FIG. 3, a shows a cross section before processing. 1 is a billet, 2.3 is a punch, and 4 is an outer mold. As shown in FIG. 3a, the difference from the prior art is that the punch end faces of punches 2 and 3 are not flat but sloped. By applying pressure in the axial direction of the billet 1 using this punch 2.3, the billet 1 is compressed in the axial direction to the state shown in Figure 1 (compression processing 1 completed), and then further compressed. After processing, the result will be as shown in FIG. 3C. The height of the outer periphery of the billet 1 after compression processing is greater than the height of the inner periphery. In other words, in this case as well, the billet 1 was compressed in the axial direction so that the compressive strain on the outer circumferential portion of the billet 1 was smaller than the compressive strain on the inner circumferential portion.
第３の方法の別の例をビレット１の断面形状をリング状
として説明すると、第４図ａに第３図と同様に加工前の
状態の断面を示す。第４図乙に示すように第３図と異な
る点は、ポンチ２．３のポンチ端面は平面であり、加工
前のビレット１の外周部の高さが内周部の高さより小さ
いことである。Another example of the third method will be explained assuming that the cross-sectional shape of the billet 1 is ring-shaped. FIG. 4a shows a cross-section of the billet before processing, similar to FIG. 3. As shown in Figure 4 B, the difference from Figure 3 is that the punch end face of punch 2.3 is flat, and the height of the outer periphery of the billet 1 before processing is smaller than the height of the inner periphery. .
第４図すに圧縮加工１の加工後の状態を示す。加工後の
ビレット１はほぼ円筒体状となり、ビレット１の外周部
の高さと内周部の高さはほぼ一致する。この場合も同様
に、ビレット１の外周部の圧縮ひずみが内周部の圧縮ひ
ずみより大きくなるようにビレット１の軸方向に圧縮加
工を施したことになる。さらに、圧縮加工を行なうと第
４図Ｃに示した状態になる。Figure 4 shows the state after compression processing 1. After processing, the billet 1 has a substantially cylindrical shape, and the height of the outer circumferential portion of the billet 1 and the height of the inner circumferential portion of the billet 1 substantially match. In this case as well, the billet 1 is compressed in the axial direction so that the compressive strain on the outer circumferential portion of the billet 1 is greater than the compressive strain on the inner circumferential portion. Further, when compression processing is performed, the state shown in FIG. 4C is obtained.
第４の方法は、第３の方法で得たビレット１を更に、ビ
レット１の一部分に軸方向に圧縮加工を施す方法であり
、この方法は前記公知技術と同じである。The fourth method is a method in which a portion of the billet 1 obtained by the third method is further compressed in the axial direction, and this method is the same as the above-mentioned known technique.
以上述べてきた様に、本発明は前記公知技術（特開昭６
８−１９２３０８号公報）に示された圧縮加工とほとん
ど同じであるがビレット１端面を傾斜面あるいはポンチ
２．３端面を傾斜面にすることによって、この特定の圧
縮加工において、ビレット１の外周部の圧縮ひずみが内
周部の圧縮ひずみより小さくなるようにビレット１の軸
方向に圧縮加工を施すことができ、これによって、磁石
の内周部では径方向に磁化容易方向を有し、外周部では
周方向に磁化容易方向を有する異方性構造となり、内周
多極着磁に適した磁石が得られる。As described above, the present invention is based on the above-mentioned known technology (Japanese Unexamined Patent Publication No. 6
8-192308), but by making the end face of the billet 1 an inclined surface or the end face of the punch 2.3 an inclined surface, in this particular compression processing, the outer peripheral part of the billet 1 is It is possible to perform compression processing in the axial direction of the billet 1 so that the compressive strain of In this case, an anisotropic structure having an easy magnetization direction in the circumferential direction is obtained, and a magnet suitable for internal multi-pole magnetization can be obtained.
前記の二つの例の組み合わせでも、ビレット１の外周部
の圧縮ひずみが内周部の圧縮ひずみより小さくなるよう
にビレット１の軸方向に圧縮加工を施すことができる。Even in a combination of the above two examples, the billet 1 can be compressed in the axial direction so that the compressive strain on the outer circumferential portion of the billet 1 is smaller than the compressive strain on the inner circumferential portion.
つまり、第１図に示した金型（ポンチ端面が傾斜面）を
用いて、第２図に示したビレット（ビレット端面が傾斜
面）を圧縮加エする方法である。That is, this is a method of compressing the billet shown in FIG. 2 (the billet end surface is an inclined surface) using the mold shown in FIG. 1 (the punch end surface is an inclined surface).
前述した例では、ポンチ２．３端面あるいはビレット１
端面が傾斜面であったが他に階段状面椴付き形状）、平
面＋傾斜面あるいは以上の組み合わせなどあり、さらに
凹凸状にするポンチ２．３あるいはビレット１端面は両
面でも片面でもよい。In the above example, the punch 2.3 end face or billet 1
Although the end face is a sloped surface, there are other shapes such as a stepped surface (with a stepped surface), a flat surface + a sloped surface, or a combination of the above.Furthermore, the end surface of the punch 2.3 or the billet 1 that is made into an uneven shape may be on both sides or on one side.
必要なことはビレット１の外周部の圧縮ひずみが内周部
の圧縮ひずみより小さくなるようにビレット１の軸方向
に圧縮加工を施すことである。これによって、磁石の内
周部では径方向に磁化容易方向を有し、外周部では周方
向に磁化容易方向を有する異方性構造となり、内周多極
着磁に適した磁石が得られる。What is necessary is to compress the billet 1 in the axial direction so that the compressive strain on the outer circumferential portion of the billet 1 is smaller than the compressive strain on the inner circumferential portion. This results in an anisotropic structure in which the inner circumference of the magnet has an easy magnetization direction in the radial direction and the outer circumference has an easy magnetization direction in the circumferential direction, and a magnet suitable for inner circumference multipole magnetization can be obtained.
前述したような圧縮加工の可能な温度範囲については、
５３０〜８３０’Ｃの温度領域において、加工が行えた
が、７８０’Ｃを越える温度では、磁気特性がかなり低
下した。より望ましい温度範囲としては５６０〜７６０
’Ｃであった。Regarding the possible temperature range of compression processing as mentioned above,
Processing was possible in the temperature range of 530 to 830'C, but at temperatures above 780'C, the magnetic properties were significantly degraded. A more desirable temperature range is 560-760
'C.
次に本発明の更に具体的な実施例について説明° す
る。Next, more specific embodiments of the present invention will be described.
実施例１（第２図）
配合組成で６９．５ ％のＭｎ、２９．３ ％の人ｅ１
０、５ ％のＣ及び０．７％のＮｉを溶解鋳造し、外径
３０Ｍ１ｌ、内径１６屑り外周部の長さ２ｏ朋、内周部
の長さ２５ｊｒｌの両端面が傾斜面のビレット１を作製
した。このビレット１に１１００’Ｃで２時間保持した
後、６００°Ｃｔで風冷し、６００’Ｃで３０分間保持
した後、室温まで放冷する熱処理を施した。次に、潤滑
剤を介して、第２図に示したようなポンチ２．３よりな
る金型を用いてビレット１の外周および内周を自由な状
態にして、６８０°Ｃの温度で、ビレット１の長さが１
２ｆｆまでの圧縮加工を行った。Example 1 (Figure 2) Mixture composition: 69.5% Mn, 29.3% Man e1
Billet 1 is made by melting and casting 0.5% C and 0.7% Ni, and has an outer diameter of 30M1l, an inner diameter of 16 pieces, a length of the outer circumference of 2omm, a length of the inner circumference of 25jrl, and both end surfaces are inclined surfaces. was created. This billet 1 was heat-treated by being held at 1100'C for 2 hours, air-cooled at 600°C, held at 600'C for 30 minutes, and then allowed to cool to room temperature. Next, the outer and inner peripheries of the billet 1 are made free using a mold consisting of a punch 2.3 as shown in Fig. 2 through a lubricant, and the billet is heated at a temperature of 680°C. The length of 1 is 1
Compression processing up to 2ff was performed.
加工後のビレット１を内径２４ｆｉに切削加工した後、
内周表面に２４極の内周着磁した。着磁は２０００μＦ
のオイルコンデンサーを用い、１６００Ｖでパルス着磁
した。内周表面の表面磁束密度をホール素子で測定した
。After cutting the processed billet 1 to an inner diameter of 24fi,
The inner circumferential surface was magnetized with 24 poles. Magnetization is 2000μF
Pulse magnetization was performed at 1600V using an oil condenser. The surface magnetic flux density on the inner peripheral surface was measured using a Hall element.
比較のために、前記と同じ配合組成のＭｎ 、ムｌ。For comparison, Mn and mulch with the same composition as above.
ＣおよびＮ１を溶解鋳造し、外径３０ｆｆ、内径１θ酊
、長さ２２．５ｆｆの円筒ビレットを作製し、前記と同
じ熱処理を行った。次に、潤滑剤を介して、長さが１２
０までの前記と同じ圧縮加工を行った。C and N1 were melted and cast to produce a cylindrical billet with an outer diameter of 30 ff, an inner diameter of 1θ, and a length of 22.5 ff, and the same heat treatment as above was performed. Next, through the lubricant, length 12
The same compression process as above was performed up to 0.
さらに前記と同様に切削加工した後、着磁し、表面磁束
密度を測定した。Furthermore, after cutting in the same manner as described above, it was magnetized and the surface magnetic flux density was measured.
以上の両者の値を比較すると、本実施例の方法で得た磁
石の表面磁束密度の値は、比較のために作製した磁石の
それの約１．２倍であった。Comparing the above two values, the value of the surface magnetic flux density of the magnet obtained by the method of this example was about 1.2 times that of the magnet produced for comparison.
さらに、本発明のさきほど着磁した磁石を第５図に示す
ような拘束金型６、可動ポンチ、下型７よりなる金型を
用いて、６８０′Ｃの温度で、ビレット１の内周部のみ
を圧縮加工した。第６図ａは加工前の状態を示し、第６
図すは加工後の状態を示す。５は拘束金型、６は可動ポ
ンチ、７は下型である。拘束金型６と下型７によって、
ビレット１を固定及び拘束し、可動ポンチ６でビレット
１を加圧することにより第６図すに示す状態になり、こ
れによってビレット１の内周部のみが圧縮加工される。Furthermore, using a mold consisting of a restraining mold 6, a movable punch, and a lower mold 7 as shown in FIG. Only the material was compressed. Figure 6a shows the state before processing;
The figure shows the state after processing. 5 is a restraining die, 6 is a movable punch, and 7 is a lower die. By the restraint mold 6 and lower mold 7,
By fixing and restraining the billet 1 and pressurizing the billet 1 with the movable punch 6, the state shown in FIG. 6 is obtained, whereby only the inner peripheral portion of the billet 1 is compressed.
なおポンチ６の直径は３０Ｍ１１である。圧縮加工後の
内周部の長さは８ｆｆであった。加工後のビレット１を
内径２４ｆｆに切削加工した後、前記と同様に着磁して
、この圧縮加工の前・後で表面磁束密度の値を比較する
と、加工後の方が０．２ＫＧ高くなった。Note that the diameter of the punch 6 is 30M11. The length of the inner peripheral portion after compression processing was 8ff. After cutting the processed billet 1 to an inner diameter of 24ff, it was magnetized in the same manner as described above, and when comparing the surface magnetic flux density values before and after this compression processing, the value after processing was 0.2 KG higher. Ta.
実施例２（第１図）
配合組成で６９．４％のＭｎ、２９．３％のム４１０．
５％（７）Ｃ，０，７％ノＮｉ及び０．１ ％（７）Ｔ
ｉを溶解鋳造し、外径３０１１１．内径１６ｆｌ、長さ
２５ｆｆの円筒ビレットを作製し、実施例１と同じ熱処
理をした。次に、実施例１と同様に潤滑剤を介して、第
１図に示したような金型を用いて、外周部の長さが１５
ｆｌまでの圧縮加工を行った。なお第１図において、ポ
ンチ端面の傾斜角αは１０°である。Example 2 (Figure 1) The blend composition was 69.4% Mn and 29.3% Mn410.
5%(7)C, 0.7%Ni and 0.1%(7)T
i was melted and cast, and the outer diameter was 30111. A cylindrical billet with an inner diameter of 16 fl and a length of 25 ff was prepared and subjected to the same heat treatment as in Example 1. Next, as in Example 1, using a lubricant and using a mold as shown in FIG.
Compression processing was performed to fl. In FIG. 1, the inclination angle α of the punch end face is 10°.
加工後のビレット１を内径２４ｆｌに切削加工した後、
実施例１と同様に２４極の内周着磁し、表面磁束密度を
測定した。After cutting the processed billet 1 to an inner diameter of 24fl,
As in Example 1, the inner periphery of 24 poles was magnetized, and the surface magnetic flux density was measured.
比較のために、前記と同じ配合組成のＭｎ 、人ｅ。For comparison, Mn and human e with the same composition as above.
Ｇ 、 ）ｉｉおよびＴｉを溶解鋳造し、外径３０ ｕ
、内径１６ｆｉ、長さ２５ｆｆの円筒ビレット１を作製
し、前記と同じ熱処理をした。次に、潤滑剤を介して、
実施例１で用いた金型を用いて、長さが１５３ｆｆまで
の圧縮加工を行った。さらに前記と同様に切削加工した
後、着磁し、表面磁束密度を測定した。G, )ii and Ti are melted and cast, and the outer diameter is 30 u.
A cylindrical billet 1 having an inner diameter of 16fi and a length of 25ff was prepared and subjected to the same heat treatment as described above. Next, through the lubricant,
Using the mold used in Example 1, compression processing was performed up to a length of 153 ff. Furthermore, after cutting in the same manner as described above, it was magnetized and the surface magnetic flux density was measured.
以上の両者の値を比較すると、本実施例の方法で得た磁
石の表面磁束密度の値は、比較のために作製した磁石の
それの約１．２倍であった。Comparing the above two values, the value of the surface magnetic flux density of the magnet obtained by the method of this example was about 1.2 times that of the magnet produced for comparison.
さらに、本発明のさきほど着磁した磁石を実施例１と同
様に、内周部のみを長さが７ｆｆにまでの圧縮加工した
。加工後のビレット１を内径２４１１Ｍに切削し、前記
と同様に着磁して、この圧縮加工の前・後で表面磁束密
度の値を比較すると、加工後の方が０．２ＫＧ高くなっ
た。Furthermore, in the same manner as in Example 1, only the inner circumferential portion of the previously magnetized magnet of the present invention was compressed to a length of 7 ff. The billet 1 after processing was cut to an inner diameter of 2411M, magnetized in the same manner as described above, and when the surface magnetic flux density values were compared before and after this compression processing, the value after processing was 0.2 KG higher.
実施例３
実施例１と同じ配合組成のＭｎ 、ム／、ＣおよびＮｉ
を溶解鋳造し、外径３０ｆｆ、内径１６Ｍ１外周部の長
さ２０１＋１．内周部の長さ２５ｆｆの両端面が階段上
で段付き部の境界の径が２３ｆｆのビレットを作製し、
実施例１と同じ熱処理をした後、実施例１と同じ圧縮加
工をした。加工後のビレット１の長さは１２ｆｆであっ
た。Example 3 Mn, Mu/, C and Ni with the same composition as Example 1
was melted and cast, and the outer diameter was 30ff, the inner diameter was 16M1, and the length of the outer circumference was 201+1. A billet with an inner circumferential length of 25 ff, both end faces on stairs, and a stepped part boundary diameter of 23 ff was produced,
After performing the same heat treatment as in Example 1, the same compression processing as in Example 1 was performed. The length of billet 1 after processing was 12ff.
加工後のビレット１を内径２４ｆｌに切削加工した後、
実施例１と同様に２４極の内周着磁し、表面磁束密度を
測定して、実施例１で比較のために作製した磁石と比較
した。After cutting the processed billet 1 to an inner diameter of 24fl,
The inner periphery of the magnet was magnetized with 24 poles in the same manner as in Example 1, and the surface magnetic flux density was measured and compared with the magnet produced for comparison in Example 1.
以上の両者の値を比較すると、本実施例の方法で得た磁
石の表面磁束密度の値は、比較のために作製した磁石の
それの約１．３倍であった。Comparing the above two values, the value of the surface magnetic flux density of the magnet obtained by the method of this example was about 1.3 times that of the magnet produced for comparison.
さらに、本発明のさきほど着磁した磁石を実施例１と同
様に、内周部のみを圧縮加工した。加工後の内周部の長
さは８ｆｆであった。加工後のビレットを内径２４ｆｌ
に切削した後、前記と同様に着磁して、この圧縮加工の
前・後で表面磁束密度の値を比較すると、加工後の方が
０．２ＫＧ高くなった。Furthermore, in the same manner as in Example 1, only the inner peripheral portion of the magnet of the present invention, which had just been magnetized, was subjected to compression processing. The length of the inner peripheral portion after processing was 8ff. After processing, the billet has an inner diameter of 24 fl.
After cutting, the surface magnetic flux density was magnetized in the same manner as described above, and when the surface magnetic flux density values were compared before and after the compression process, the value after the process was 0.2 KG higher.
実施例４
実施例２と同じ配合組成のＭｎ 、ム／、Ｃ，Ｎｉおよ
びＴ１を溶解鋳造し、外径３ｏＩｎｌ、内径１６ｆｌ、
長さ２５ｆｆの円筒ビレットを作製し、実施例１と同じ
熱処理を行った。次に、潤滑剤を介して、第６図に示し
た様なポンチ２．３よりなる金型を用いてビレット１の
外周および内周を自由な状態にして、６８０°Ｃの温度
で、ビレット１の外周部の長さが１７ｆｆまでの圧縮加
工を行った。なお第６図において、ポンチ端面の段付き
部の径は３０ｆｆ、段差は２．５Ｎである。Example 4 Mn, Mu/, C, Ni and T1 having the same composition as in Example 2 were melted and cast, and an outer diameter of 3 oInl, an inner diameter of 16fl,
A cylindrical billet with a length of 25 ff was produced and subjected to the same heat treatment as in Example 1. Next, the outer and inner peripheries of the billet 1 are made free using a mold consisting of a punch 2.3 as shown in Fig. 6 through a lubricant, and the billet is Compression processing was performed until the length of the outer circumference of No. 1 was 17ff. In FIG. 6, the diameter of the stepped portion on the end face of the punch is 30ff, and the step difference is 2.5N.
加工後のビレット１を内径２４ｆｆに切削加工した後、
実施例１と同様に２４極の内周着磁し、表面磁束密度を
測定して、実施例２で比較のために作製した磁石と比較
した。After cutting the processed billet 1 to an inner diameter of 24ff,
The inner periphery of the magnet was magnetized with 24 poles in the same manner as in Example 1, and the surface magnetic flux density was measured and compared with the magnet produced for comparison in Example 2.
以上の両者の値を比較すると、本発明の方法で得た磁石
の表面磁束密度の値は、比較のために作製した磁石のそ
れの約１．３倍であった。Comparing the above two values, the value of the surface magnetic flux density of the magnet obtained by the method of the present invention was about 1.3 times that of the magnet produced for comparison.
さらに、本発明のさきほど着磁した磁石を実施例１と同
様に、内周部のみを圧縮加工した。加工後の内周部の長
さは８′Ｉｎｌであった。加工後のビレット１を内径２
４ｆｆに切削した後、前記と同様に着磁して、この圧縮
加工の前・後で表面磁束密度の値を比較すると、加工後
の方が０゜２ＫＧ高くなった。Furthermore, in the same manner as in Example 1, only the inner peripheral portion of the magnet of the present invention, which had just been magnetized, was subjected to compression processing. The length of the inner peripheral portion after processing was 8'Inl. After processing, billet 1 has an inner diameter of 2
After cutting to 4ff, it was magnetized in the same manner as described above, and when comparing the surface magnetic flux density values before and after this compression processing, the value after processing was 0°2 KG higher.
実施例５
実施例１と同じ配合組成のＭｎ 、ムｌ、ＣおよびＮ１
を溶解鋳造し、外径３０ｆｆ、内径１６Ｍ１外周部の長
さ２０ｆｌ、内周部の長さ２５３１１の両端面が傾斜面
のビレット１を作製して、実施例１と同じ熱処理を行っ
た。次に、潤滑剤を介して、第４図に示したような金型
を用いてビレット１の外周および内周を自由な状態にし
て、６８０°Ｃの温度で、ビレット１の長さが１５ｆｌ
までの圧縮加工を行った。なお第４図において、外型４
の内径は３４１ｆｆである。Example 5 Mn, Mul, C and N1 with the same composition as Example 1
was melted and cast to produce a billet 1 having an outer diameter of 30 ff, an inner diameter of 16M1, an outer circumferential length of 20 fl, an inner circumferential length of 25311, and both end faces having sloped surfaces, and the same heat treatment as in Example 1 was performed. Next, the outer and inner peripheries of the billet 1 are made free using a mold as shown in Fig. 4 using a lubricant, and the length of the billet 1 is 15fl at a temperature of 680°C.
Compression processing was performed up to. In addition, in Fig. 4, the outer mold 4
The inner diameter of is 341ff.
加工後のビレット１を内径２０ｊＱＩに切削加工した後
、実施例１と同様に２４極の内周着磁し、内周表面の表
面磁束密度を測定した。After cutting the processed billet 1 to an inner diameter of 20jQI, the inner circumference was magnetized with 24 poles in the same manner as in Example 1, and the surface magnetic flux density on the inner circumference surface was measured.
比較のために、前記と同じ配合組成のＭｎ、ムｅ。For comparison, Mn and Mue with the same composition as above.
ＣおよびＮ１を溶解鋳造し、外径３０ｆｆｉｌ、内径１
６謂、長さ２２．５ｆｆの円筒ビレットを作製し、前記
と同じ熱処理を行った。次に、潤滑剤を介して、前記と
同じ圧縮加工を行った。なお加工後のビレット１の長さ
は１５ｆｌであった。さらに前記と同様に切削加工した
後、着磁し、表面磁束密度を測定した。C and N1 were melted and cast, and the outer diameter was 30ffil and the inner diameter was 1.
A cylindrical billet having a length of 22.5 ff was prepared and subjected to the same heat treatment as described above. Next, the same compression process as above was performed using a lubricant. The length of billet 1 after processing was 15 fl. Furthermore, after cutting in the same manner as described above, it was magnetized and the surface magnetic flux density was measured.
以上の両者の値を比較すると、本実施例の方法で得た磁
石の表面磁束密度の値は、比較のために作製した磁石の
それの約１．２倍であった。Comparing the above two values, the value of the surface magnetic flux density of the magnet obtained by the method of this example was about 1.2 times that of the magnet produced for comparison.
さらに、本発明のさきほど着磁した磁石を実施例１と同
様に、内周部のみを圧縮加工した。なお第５図において
ポンチ６の直径は２６１ｆｍｌである。Furthermore, in the same manner as in Example 1, only the inner peripheral portion of the magnet of the present invention, which had just been magnetized, was subjected to compression processing. In addition, in FIG. 5, the diameter of the punch 6 is 261 fml.
加工後の内周部の長さは１０ｊｆｌであった。加工後の
ビレット１を内径２０ｆｌに切削した後、前記と同様に
着磁して、この圧縮加工の前・後で表面磁束密度の値を
比較すると、加工後の方が０．２ＫＧ高くなった。The length of the inner peripheral portion after processing was 10jfl. After cutting billet 1 after processing to an inner diameter of 20fl, it was magnetized in the same manner as above, and when comparing the surface magnetic flux density values before and after this compression processing, the value after processing was 0.2 KG higher. .
実施例６
実施例１と同じ配合組成のＭｎ 、ム／、Ｃ，Ｎｉおよ
びＴｉを溶解鋳造し、外径３０ｆｆ、内径１６ｆｉ。Example 6 Mn, Mu/, C, Ni, and Ti having the same composition as in Example 1 were melted and cast, and the outer diameter was 30ff and the inner diameter was 16fi.
長さ２５ｍＩの円筒ビレットを作製して、実施例１と同
じ熱処理を行った。次に、潤滑剤を介して、第３図に示
したような金型を用いてビレット１のの圧縮加工を行っ
た。なお第３図において１、ポンチ２．３端面の傾斜角
αは１０°、外型４の内径は３４ｊｆｆである。A cylindrical billet with a length of 25 mI was prepared and subjected to the same heat treatment as in Example 1. Next, the billet 1 was compressed using a mold as shown in FIG. 3 using a lubricant. In FIG. 3, the inclination angle α of the punch 2.3 end face is 10°, and the inner diameter of the outer die 4 is 34jff.
加工後のビレット１を内径２ｏｊｒｌＩ＋に切削した後
、実施例１と同様に２４極の内周着磁をし、表面磁束密
度を測定して、実施例５で比較のために作製した磁石と
比較した。After cutting the processed billet 1 to an inner diameter of 2 ojrlI+, the inner circumference was magnetized with 24 poles in the same manner as in Example 1, the surface magnetic flux density was measured, and compared with the magnet produced for comparison in Example 5. did.
以上の両者の値を比較すると、本実施例の方法で得た磁
石の表面磁束密度の値は、比較のために作製した磁石の
それの約１．２倍であった。Comparing the above two values, the value of the surface magnetic flux density of the magnet obtained by the method of this example was about 1.2 times that of the magnet produced for comparison.
さらに、本発明のさきほど着磁した磁石を実施例１と同
様に、内周部のみを圧縮加工した。加工後の内周部の長
さは７ｆｆであった。加工後のビレット１を内径２０Ｗ
ＩＩに切削した後、前記と同様に着磁して、この圧縮加
工の前・後で表面磁束密度の値を比較すると１、加工後
の方が０．２ＫＧ高くなった。Furthermore, in the same manner as in Example 1, only the inner peripheral portion of the magnet of the present invention, which had just been magnetized, was subjected to compression processing. The length of the inner peripheral portion after processing was 7ff. Billet 1 after processing has an inner diameter of 20W
After cutting it to II, it was magnetized in the same manner as described above, and when comparing the surface magnetic flux density values before and after this compression processing, it was 1 kg higher and 0.2 KG higher after processing.
以上、Ｍｎ−ムｇ−ｃ系磁石用合金の組成については、
Ｎｉ添加の４元系とＮｉ 、 Ｔｉ添加の６元系のもの
についてのみ示したが、Ｍｎ−ム１−ｃ系磁石用合金の
基本組成である３元系についても磁石の磁気特性に若干
の差は認められたが、公知の圧縮加工による方法より前
述したような磁気特性の向上が認められた。As mentioned above, regarding the composition of the Mn-Mg-C alloy for magnets,
Although only the four-element system with Ni addition and the six-element system with Ni and Ti additions are shown, the ternary system, which is the basic composition of the Mn-1-C magnet alloy, also has some effects on the magnetic properties of the magnet. Although a difference was observed, the above-mentioned improvement in magnetic properties was observed compared to the known compression processing method.
また、ビレット１の一部分への圧縮加工については、ビ
レット１の内周部のみを圧縮加工する方法だけ示したが
、外周部のみ圧縮加工する場合でもよいが、この場合は
磁石全体を径方向に磁化容易方向を有するようにしたい
場合に有効である。Regarding the compression processing of a portion of the billet 1, only the method of compressing only the inner circumference of the billet 1 has been shown, but it is also possible to compress only the outer circumference, but in this case, the entire magnet may be compressed in the radial direction. This is effective when it is desired to have an easy magnetization direction.
さらに、ビレット１およびポンチ２，３端面の形状につ
いては傾斜面および階段状の段付き形状の例を示したが
、平面＋傾斜面あるいは以上の組み合わせなどでも従来
の圧縮加工に比べて磁気特性の向上が認められた。また
、凹凸状にする端面は両面でも片面でも大きな差は認め
られなかった。Furthermore, regarding the shape of the billet 1 and punches 2 and 3 end faces, we have shown examples of sloped surfaces and stepped shapes, but even flat + sloped surfaces or a combination of the above may have better magnetic properties than conventional compression processing. Improvement was observed. Furthermore, no significant difference was observed between the end surfaces to be made uneven, whether on both sides or on one side.
ゝ 発明の効果
本発明は、実施例によって述べたように、Ｍｎ−ムｌ−
０系磁石用合金からなる中空体状のビレットに、少なく
ともビレットの外周および内周の一部分を自由にした状
態で、ビレットの外周部の圧縮ひずみが内周部の圧縮ひ
ずみより小さくなるようにビレットの軸方向に圧縮加工
を施すことによって内周多極着磁を施した場合に高い磁
気特性を示す磁石を得るものである。Effects of the Invention As described in the examples, the present invention provides Mn-mul-
A hollow body-shaped billet made of an alloy for 0-series magnets is heated so that the compressive strain on the outer circumference of the billet is smaller than the compressive strain on the inner circumference, with at least a portion of the outer circumference and inner circumference of the billet free. By performing compression processing in the axial direction of the magnet, a magnet that exhibits high magnetic properties when subjected to inner circumferential multi-pole magnetization is obtained.
この方法によって、磁石の内周部では径方向に磁化容易
方向を有し、外周部では周方向に磁化容易方向を有する
磁石を得ることができる。By this method, it is possible to obtain a magnet that has an easy magnetization direction in the radial direction at the inner circumference of the magnet, and an easy magnetization direction in the circumferential direction at the outer circumference.
第１図ないし第６図は本発明の圧縮加工の一例を示す断
面図である。
１・・・・・・ビレット、２．３・・・・・・ポンチ、
４・・・・・・外型、６・・・・・・拘束金型、６・・
・・・・可動ポンチ、７・・・・・・下型、α・・・・
・・傾斜角。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第５
図
（の）
（ｂ）
１６ 図
（ＯＬ）
（ｂ）1 to 6 are cross-sectional views showing an example of compression processing according to the present invention. 1... Billet, 2.3... Punch,
4...Outer mold, 6...Restriction mold, 6...
...Movable punch, 7...Lower die, α...
...Inclination angle. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 5
Figure (of) (b) 16 Figure (OL) (b)
Claims (4)
なる中空体状のビレットに、５３０〜８３０℃の温度で
、少なくともビレットの外周および内周の一部分を自由
にした状態で、ビレットの外周部の圧縮ひずみが内周部
の圧縮ひずみより小さくなるようにビレットの軸方向に
圧縮加工を施すマンガン−アルミニウム−炭素系合金磁
石の製造法。(1) A hollow billet made of a manganese-aluminum-carbon alloy for magnets is heated at a temperature of 530 to 830°C, with at least a portion of the outer periphery and inner periphery of the billet free. A method of manufacturing a manganese-aluminum-carbon alloy magnet in which compression processing is performed in the axial direction of a billet so that the compressive strain is smaller than that of the inner circumference.
ずみより小さくなるようにビレットの軸方向に圧縮加工
を施した後、さらにビレットの一部分に圧縮加工を施す
特許請求の範囲第１項に記載のマンガン−アルミニウム
−炭素系合金磁石の製造法。(2) After compressing the billet in the axial direction so that the compressive strain on the outer circumference of the billet is smaller than the compressive strain on the inner circumference, a portion of the billet is further compressed, as claimed in claim 1. A method for producing a manganese-aluminum-carbon alloy magnet as described in .
ずみより小さくなるようにビレットの軸方向に圧縮加工
を施し、さらにビレットの外周を拘束した状態で、しか
も少なくとも内周の一部分を自由にした状態で、ビレッ
トの軸方向に圧縮加工を施す特許請求の範囲第１項に記
載のマンガン−アルミニウム−炭素系合金磁石の製造法
。(3) Compressing the billet in the axial direction so that the compressive strain on the outer periphery of the billet is smaller than the compressive strain on the inner periphery, and further, while the outer periphery of the billet is constrained, at least a portion of the inner periphery is free. 2. The method for manufacturing a manganese-aluminum-carbon alloy magnet according to claim 1, wherein the billet is compressed in the axial direction in a state where the billet is in a state of .
ずみより小さくなるようにビレットの軸方向に圧縮加工
を施し、さらにビレットの外周を拘束した状態で、しか
も少なくとも内周の一部分を自由にした状態で、ビレッ
トの軸方向に圧縮加工を施した後、さらにビレットの一
部分に、ビレットの軸方向に圧縮加工を施す特許請求の
範囲第１項に記載のマンガン−アルミニウム−炭素系合
金磁石の製造法。(4) The billet is compressed in the axial direction so that the compressive strain on the outer circumference of the billet is smaller than the compressive strain on the inner circumference, and while the outer circumference of the billet is constrained, at least a portion of the inner circumference is free. The manganese-aluminum-carbon-based alloy magnet according to claim 1, wherein the billet is compressed in the axial direction, and then a part of the billet is compressed in the axial direction of the billet. manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8855686A JPH0663072B2 (en) | 1986-04-17 | 1986-04-17 | Method for producing manganese-aluminum-carbon alloy magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8855686A JPH0663072B2 (en) | 1986-04-17 | 1986-04-17 | Method for producing manganese-aluminum-carbon alloy magnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62247056A true JPS62247056A (en) | 1987-10-28 |
| JPH0663072B2 JPH0663072B2 (en) | 1994-08-17 |
Family
ID=13946141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8855686A Expired - Lifetime JPH0663072B2 (en) | 1986-04-17 | 1986-04-17 | Method for producing manganese-aluminum-carbon alloy magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0663072B2 (en) |
-
1986
- 1986-04-17 JP JP8855686A patent/JPH0663072B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0663072B2 (en) | 1994-08-17 |
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