JPH0673326B2 - Anisotropic manganese-aluminum-carbon alloy magnet - Google Patents
Anisotropic manganese-aluminum-carbon alloy magnetInfo
- Publication number
- JPH0673326B2 JPH0673326B2 JP60007354A JP735485A JPH0673326B2 JP H0673326 B2 JPH0673326 B2 JP H0673326B2 JP 60007354 A JP60007354 A JP 60007354A JP 735485 A JP735485 A JP 735485A JP H0673326 B2 JPH0673326 B2 JP H0673326B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- manganese
- aluminum
- anisotropic
- deformation resistance
- 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.)
- Expired - Lifetime
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- Hard Magnetic Materials (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は永久磁石に係り、特に異方性マンガン−アルミ
ニウム−炭素（Mn−Al−Ｃ）系合金磁石に関する。The present invention relates to a permanent magnet, and more particularly to an anisotropic manganese-aluminum-carbon (Mn-Al-C) alloy magnet.
（従来の技術） マンガン68.0ないし73.0重量％、炭素（1/10Mn−6.6）
ないし（1/3Mn−22.2）重量％（ただし数式内のMnはマ
ンガン成分重量％を表わす）、残部をアルミニウムの組
成からなる異方性Mn−Al−Ｃ系合金磁石はすぐれた磁気
特性をもつ永久磁石として、例えば、特公昭54-31448号
公報などにより知られている。(Prior art) Manganese 68.0 to 73.0% by weight, carbon (1 / 10Mn-6.6)
Or (1 / 3Mn-22.2)% by weight (where Mn represents the% by weight of manganese component), and the balance is an anisotropic Mn-Al-C alloy magnet having excellent magnetic characteristics. A permanent magnet is known, for example, from Japanese Patent Publication No. 54-31448.
（発明が解決しようとする問題点） 異方性Mn−Al−Ｃ系合金磁石は、前記組成範囲内にある
合金を、530ないし830℃の温度領域で押出加工などの湿
間塑性加工を施すことによって製造されるが、この合金
は鉄合金や銅合金と違って可塑性に乏しいため、塑性加
工に必要な加工圧力が高くなり、加工設備が複雑になっ
たり工具寿命が十分でないなどの問題を有する。(Problems to be Solved by the Invention) An anisotropic Mn-Al-C alloy magnet is obtained by subjecting an alloy within the above composition range to wet plastic working such as extrusion in a temperature range of 530 to 830 ° C. However, unlike iron alloys and copper alloys, this alloy is poor in plasticity, so the processing pressure required for plastic working is high, which causes problems such as complicated processing equipment and insufficient tool life. Have.
したがって、この合金の可塑性を良くして加工圧力を軽
減すること、言い換えれば、この合金の変形抵抗を小さ
くすることが工業的生産における重要な課題である。Therefore, improving the plasticity of this alloy to reduce the working pressure, in other words, reducing the deformation resistance of this alloy is an important issue in industrial production.
（問題点を解決するための手段） 本発明は、前記組成範囲のMn−Al−Ｃ系合金に適量のテ
ルル（以下、Teと記す）を添加することによって、湿間
塑性加工時の加工温度領域における変形抵抗を著しく改
善するものである。(Means for Solving Problems) The present invention is to add an appropriate amount of tellurium (hereinafter, referred to as Te) to an Mn-Al-C alloy having the above composition range to obtain a processing temperature during wet plastic working. It significantly improves the deformation resistance in the region.
（作用） 以下に代表的な実験データを示して本発明を詳細に説明
する。(Operation) The present invention will be described in detail below by showing typical experimental data.
図はマンガン68.0ないし73.0重量％、炭素（1/10Mn−6.
6）ないし（1/3Mn−22.2）重量％、残部をアルミニウム
の組成範囲内のMn−Al−Ｃ系合金にTeを添加した合金を
530ないし830℃の温度領域で湿間塑性加工を施したとき
の、Teの添加量と変形抵抗との関係を示した図で、添加
量（横軸）は上記Teを添加しないMn−Al−Ｃ系合金100
に対する重量比で、また変形抵抗値比（縦軸）は同じく
Teを添加する前の上記Mn−Al−Ｃ系合金の変形抵抗値に
対する比で表わしてある。The figure shows manganese 68.0 to 73.0% by weight, carbon (1 / 10Mn-6.
6) to (1 / 3Mn-22.2)% by weight, the balance being an alloy containing Te added to an Mn-Al-C alloy within the composition range of aluminum.
FIG. 3 is a diagram showing the relationship between the amount of Te added and the deformation resistance when wet plastic working is performed in the temperature range of 530 to 830 ° C. The amount of addition (horizontal axis) is Mn-Al- C-based alloy 100
And the ratio of deformation resistance (vertical axis) is the same.
It is represented by the ratio to the deformation resistance value of the Mn-Al-C alloy before adding Te.
この図から明らかなように、Teの添加量を増加させてい
くと、0.5の添加量（ただし、添加前の合金を100とした
重量比、添加量について以下同じ）で顕著な変形抵抗の
減少効果が現われ始め、添加量が0.5ないし5.0の領域で
はTeを添加しない合金と比べて変形抵抗値は18ないし25
％も小さくなる。さらに5.0を越えて添加すると変形抵
抗値はより小さくなり、Teの添加は変形抵抗を小さくす
る上で極めて有効に作用する。しかしながら、Teの添加
量が5.0を越えると変形抵抗値は大幅に減少するものの
磁気特性が著しく低下する問題があり、実用上望ましく
ない。すなわち、Teの添加量が0.5ないし5.0の領域にお
いては、その磁気特性の低下は１割以内であって実用磁
石としての性能は十分で何ら問題はないが、添加量が5.
0を越えると、例えば7.0のTeを添加した合金の押出加工
後の(BH)max値は3.0MG・Oeで添加しない合金の場合の(B
H)max値6.0MG・Oeと比べると半分になり実用的価値が著
しく低下する。したがって実用的には0.5ないし5.0の添
加量領域が有効である。As is clear from this figure, when the addition amount of Te is increased, the deformation resistance remarkably decreases with the addition amount of 0.5 (however, the weight ratio with the alloy before addition as 100, the same applies below). The effect begins to appear, and the deformation resistance value is 18 to 25 in the addition amount range of 0.5 to 5.0 compared with the alloy without Te addition.
% Also becomes smaller. Further, when the addition amount exceeds 5.0, the deformation resistance value becomes smaller, and the addition of Te acts extremely effectively in reducing the deformation resistance. However, when the addition amount of Te exceeds 5.0, the deformation resistance value is greatly reduced, but there is a problem that the magnetic properties are significantly deteriorated, which is not practically desirable. That is, when the amount of Te added is in the range of 0.5 to 5.0, the deterioration of the magnetic properties is within 10%, and the performance as a practical magnet is sufficient and there is no problem.
If it exceeds 0, for example, the (BH) max value after extrusion of an alloy with 7.0 Te is 3.0 MG
Compared to H) max value of 6.0MG Oe, it becomes half and the practical value is remarkably reduced. Therefore, practically, the addition amount range of 0.5 to 5.0 is effective.
Teを添加することによって変形抵抗が小さくなる効果を
もたらす原因はまだ解明されていないが、顕微鏡観察で
は0.5ないし5.0の添加量領域では結晶粒界に少量の析出
物が存在していることが認められ、この析出物の存在が
塑性加工時の変形抵抗の減少に関与しているものと推察
される。さらに添加量が5.0を越えると上記の析出物以
外にβ−Mn相およびAlMn（ｒ）相と呼ばれる非磁性相が
結晶粒界のみならず結晶粒内にも存在することが確認さ
れ、これが変形抵抗の減少効果を伴うものの磁気特性の
著しい低下を招いていると考えられる。The cause of the effect of reducing the deformation resistance by adding Te has not been clarified yet, but it is confirmed by microscopic observation that a small amount of precipitates exist in the grain boundaries in the addition amount range of 0.5 to 5.0. It is speculated that the existence of these precipitates contributes to the reduction of deformation resistance during plastic working. Furthermore, when the amount added exceeds 5.0, it was confirmed that in addition to the above precipitates, non-magnetic phases called β-Mn phase and AlMn (r) phase exist not only in the crystal grain boundaries but also in the crystal grains. It is considered that the magnetic properties are remarkably deteriorated although the resistance is reduced.
以下に代表的な実施例を示す。Typical examples are shown below.
（実施例） マンガン70.2重量％，アルミニウム29.3重量％、炭素0.
5重量％の組成からなるMn−Al−Ｃ合金ビレットおよび
この組成100に対する重量比で0.5、2.0、5.0のTeをそれ
ぞれ添加した合金ビレットを溶解鋳造により作成し、こ
れらの合金ビレットを1100℃から冷却する熱処理を施し
た後、700℃の温度で押出加工（押出比＝５）した。そ
れぞれの合金について押出加工時の変形抵抗値および押
出加工後の磁気特性(BH)max値を測定したところ次表に
示す結果が得られ、Teを0.5、2.0、5.0添加した合金
は、Teを添加しない合金と比較して磁気特性はほとんど
変らずに変形抵抗値が18〜25％も小さくなった。(Example) Manganese 70.2% by weight, aluminum 29.3% by weight, carbon 0.
An Mn-Al-C alloy billet having a composition of 5% by weight and an alloy billet containing Te at a weight ratio of 0.5, 2.0, and 5.0 with respect to 100 of this composition were prepared by melting casting, and these alloy billets were prepared from 1100 ° C. After heat treatment for cooling, extrusion processing (extrusion ratio = 5) was performed at a temperature of 700 ° C. The results shown in the following table were obtained by measuring the deformation resistance value during extrusion and the magnetic property (BH) max value after extrusion for each alloy, and the alloys added with Te 0.5, 2.0, and 5.0 are Te The magnetic properties were almost unchanged and the deformation resistance was 18 to 25% smaller than that of the alloy without addition.
（発明の効果） 以上詳細に説明して明らかなように本発明は、Mn−Al−
Ｃ系合金磁石にTeを添加することによって、その合金の
温間塑性加工時の可塑性を著しく改善することが可能で
ある。そのために生ずる加工圧力の軽減により加工金型
の寿命が従来と比べて８倍以上に延びることや加工金型
の小型簡易化が図れるなどの顕著な効果があるから、本
発明をMn−Al−Ｃ系合金磁石の工業的生産に用いて有効
な効果が得られる。 (Effects of the Invention) As will be apparent from the detailed description above, the present invention provides Mn-Al-
By adding Te to the C-based alloy magnet, it is possible to significantly improve the plasticity of the alloy during warm plastic working. Due to the reduction of the processing pressure caused thereby, the service life of the processing die can be extended eight times or more as compared with the conventional one, and the processing die can be miniaturized and simplified. Effective effects can be obtained when used for industrial production of C-based alloy magnets.
図はMn−Al−Ｃ系合金磁石にTeを添加したとき添加量と
変形抵抗との関係図である。The figure is a graph showing the relationship between the amount of addition and the deformation resistance when Te is added to the Mn-Al-C alloy magnet.
Claims (1)
10Mn−6.6）ないし（1/3Mn−22.2）重量％、残部をアル
ミニウムの組成からなる合金100に対して、テルルを重
量比で0.5ないし5.0の割合で添加した組成からなること
を特徴とする異方性マンガン−アルミニウム−炭素系合
金磁石。1. Manganese 68.0 to 73.0% by weight, carbon (1 /
10Mn-6.6) to (1 / 3Mn-22.2)% by weight, the balance being 100% alloy 100, and tellurium being added at a weight ratio of 0.5 to 5.0. An isotropic manganese-aluminum-carbon based magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60007354A JPH0673326B2 (en) | 1985-01-21 | 1985-01-21 | Anisotropic manganese-aluminum-carbon alloy magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60007354A JPH0673326B2 (en) | 1985-01-21 | 1985-01-21 | Anisotropic manganese-aluminum-carbon alloy magnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61168207A JPS61168207A (en) | 1986-07-29 |
| JPH0673326B2 true JPH0673326B2 (en) | 1994-09-14 |
Family
ID=11663619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60007354A Expired - Lifetime JPH0673326B2 (en) | 1985-01-21 | 1985-01-21 | Anisotropic manganese-aluminum-carbon alloy magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0673326B2 (en) |
-
1985
- 1985-01-21 JP JP60007354A patent/JPH0673326B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61168207A (en) | 1986-07-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |