JPS609856A - Alloy for magnetic head - Google Patents
Alloy for magnetic headInfo
- Publication number
- JPS609856A JPS609856A JP58116861A JP11686183A JPS609856A JP S609856 A JPS609856 A JP S609856A JP 58116861 A JP58116861 A JP 58116861A JP 11686183 A JP11686183 A JP 11686183A JP S609856 A JPS609856 A JP S609856A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- magnetic
- flux density
- magnetic flux
- head
- 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
- 239000000956 alloy Substances 0.000 title claims abstract description 29
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 24
- 230000004907 flux Effects 0.000 claims abstract description 22
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 17
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 12
- 238000005260 corrosion Methods 0.000 claims abstract description 11
- 230000007797 corrosion Effects 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 10
- 239000011733 molybdenum Substances 0.000 claims description 10
- 229910001004 magnetic alloy Inorganic materials 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 229910001017 Alperm Inorganic materials 0.000 description 17
- 239000000203 mixture Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 description 2
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 229910000889 permalloy Inorganic materials 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 229910000702 sendust Inorganic materials 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Soft Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は耐蝕性、耐摩耗性および磁気特性に優れた磁
気ヘッドに使用されるアルパーム合金の改良に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an alperm alloy used in a magnetic head, which has excellent corrosion resistance, wear resistance, and magnetic properties.
従来、磁気ヘッドの磁心（磁気コア）材料として知られ
ているものは多いが、その代表的なものとして、マンガ
ン−亜鉛系のフェライトとパーマロイとセンダストおよ
びアルパーム等の磁性合金があげられる。Conventionally, there are many materials known as magnetic core materials for magnetic heads, typical examples of which include manganese-zinc ferrite, permalloy, and magnetic alloys such as sendust and alperm.
しかしながら、マンガン−亜鉛系のフェライトは磁気特
性、特に飽和磁束密度が低い欠点があり、またパーマロ
イは耐摩耗性に難点があり、さらにセンダストについて
は磁気特性、耐ｗ：、耗性において優れているが、加工
性がきわめて悪く、高周波領域での損失が大きい欠点が
あった。またアルパームはアルミニウム約１６％、以下
残部鉄よりなる合金であり、磁気特性および耐摩耗性の
いずれにも優れた性質を有しているが耐蝕性に劣る欠点
があった。However, manganese-zinc ferrite has the drawback of low magnetic properties, especially low saturation magnetic flux density, permalloy has poor wear resistance, and sendust has excellent magnetic properties, wear resistance, and abrasion resistance. However, it had the drawbacks of extremely poor workability and large loss in the high frequency range. Alperm is an alloy consisting of approximately 16% aluminum and the balance iron, and although it has excellent magnetic properties and wear resistance, it has the disadvantage of poor corrosion resistance.
このように従来の磁性合金材料はそれぞれ一長一短の性
質を有するが、磁気ヘッドに用いられる磁性材料につい
ては、耐蝕性、耐摩耗および磁気特性の３点において優
れたものが要求される。As described above, conventional magnetic alloy materials each have advantages and disadvantages, but magnetic materials used in magnetic heads are required to be excellent in three respects: corrosion resistance, abrasion resistance, and magnetic properties.
そこで、先に本出願人はアルパームについて種々その研
究をなし、アルパームにモリブデンを添加して合金表面
を不動態化し、耐蝕性を改善する磁気ヘッド用合金を提
案しているが、この磁気ペンＦ粗合金で得られる磁気特
性は７０００〜８０００Ｇの磁束密度を有する。Therefore, the applicant has previously conducted various studies on Alperm and proposed an alloy for magnetic heads that improves corrosion resistance by adding molybdenum to Alperm to passivate the alloy surface. The magnetic properties obtained with the crude alloy have a magnetic flux density of 7000-8000G.
一方、近年磁気テープ材料の急速な開発にあって、たと
えばメタルテープに代表されるように抗磁力１００００
ｅ以上の高抗磁力の磁気テープが出現したため、これに
伴って磁束密度９０００Ｇ以上の磁気特性を有する磁気
ヘッドの磁性材料が必要にせがまれている。On the other hand, with the rapid development of magnetic tape materials in recent years, for example, metal tapes with a coercive force of 10,000
With the emergence of magnetic tapes with high coercive force of e or more, there is a need for magnetic materials for magnetic heads having magnetic properties with a magnetic flux density of 9000 G or more.
そこで、この発明は上述した点に鑑みてなされたもので
、その目的とするところは従来のアルパームを改良し、
アルパームの利点を損なうことなく、さらに飽和磁束密
度の高い磁性合金を提供するにある。Therefore, this invention was made in view of the above points, and its purpose is to improve the conventional Alperm,
The objective is to provide a magnetic alloy with even higher saturation magnetic flux density without sacrificing the advantages of Alperm.
すなわち、本発明は、耐蝕性を下げることなくアルミニ
ウムの組成比率を下げ、鉄成分を増加することにより磁
束密度を高くすると共に、加工性を向上し冷間圧延で５
０ミクロン程度の薄板を得られるように改良し、高周波
領域での過電流損失を低減し、且つ熱処理条件を最適に
選ぶことにより抗磁力Ｈｃを小さくし磁気ヘッド用に適
した磁性合金を供するものである。That is, the present invention lowers the composition ratio of aluminum and increases the iron component without lowering the corrosion resistance, thereby increasing the magnetic flux density and improving workability.
A magnetic alloy that is improved to obtain a thin plate of about 0 microns, reduces overcurrent loss in the high frequency range, and reduces the coercive force Hc by optimally selecting heat treatment conditions, thereby providing a magnetic alloy suitable for magnetic heads. It is.
アルパームの組成において、アルミニウムの比率に対す
る磁束密度Ｂおよび抗磁力Ｈｃの関係は第１図（ａｌ
、 （ｂｌに示されるように変化する。この第１図（ａ
） 、 （ｂｌにおいて、抗磁力Ｈｃはアルミニウム１
２．５％付近から急激に減少し、０．１０ｅｌ以下とな
り、また磁束密度Ｂは鉄の比率に比例し、磁束密度９０
００Ｇを得る限界はアルミニウム１４．０％付近にある
ことが理解される。。In the composition of alperm, the relationship between the magnetic flux density B and coercive force Hc with respect to the aluminum ratio is shown in Figure 1 (al
, (changes as shown in bl. This figure 1 (a
), (in bl, the coercive force Hc is aluminum 1
It rapidly decreases from around 2.5% to less than 0.10el, and the magnetic flux density B is proportional to the iron ratio, and the magnetic flux density B is 90%.
It is understood that the limit for obtaining 00G is around 14.0% aluminum. .
印加硼界１００ｅでの磁束密度Ｂｏｏだけを考えると、
第２図に示すようにアルパーム合金の熱処理はアニール
で行った方が高いが、後述する如く、規則格子が生成す
るため抗磁力）１ｃも高くなる。Considering only the magnetic flux density Boo at an applied field of 100e,
As shown in FIG. 2, the heat treatment of the Alperm alloy by annealing is more expensive, but as will be described later, the coercive force (1c) is also higher because a regular lattice is generated.
磁気ヘッド用材料としては抗磁力）（ｃが０．１５以下
であることが必要であり、そのためには焼入れをするこ
とが必要である。熱処理を焼入れによって行なう場合、
磁束密度Ｂｏｏは第１図（ａｌのようになり、９０００
Ｇ以上の磁束密度Ｂｏｏを有する組成はアルミニウム１
４％以下、モリブデン３．５％以下である。また抗磁力
Ｈｃが０．１５以下となるのは、アルミニウム１２．５
％以上である。なおモリブデン添加量による抗磁力１−
Ｉ Ｃの差はこの組成範囲では確認されなかった。As a material for a magnetic head, it is necessary that the coercive force (c) is 0.15 or less, and for that purpose, it is necessary to harden it. When heat treatment is performed by hardening,
The magnetic flux density Boo is as shown in Figure 1 (al), 9000
The composition having a magnetic flux density Boo greater than G is aluminum 1
4% or less, and molybdenum 3.5% or less. Also, aluminum has a coercive force Hc of 0.15 or less.
% or more. In addition, the coercive force 1- depending on the amount of molybdenum added
No difference in IC was observed in this composition range.
一方、鉄−アルミニウム合金は、合金組成Ｆｅ３＾１の
規則格子を生成することが知られており、この相変態点
以上の温度から急冷熱処理することが必要である。本発
明の組成の場合、第２図に示すように、５７０°Ｃ以上
の温度で磁束は密度が９０００Ｇを上廻り、６４０℃以
下の温度で抗磁力０゜１０ｅが実現される。On the other hand, iron-aluminum alloys are known to produce a regular lattice with an alloy composition of Fe3^1, and it is necessary to perform rapid cooling heat treatment from a temperature equal to or higher than this phase transformation point. In the case of the composition of the present invention, as shown in FIG. 2, the magnetic flux density exceeds 9000 G at a temperature of 570° C. or higher, and a coercive force of 0°10e is achieved at a temperature of 640° C. or lower.
また、モリブデンの添加量は、１．０％以上あれば実際
上差支えのない耐蝕性が得られ、且つ磁束密度９０００
Ｇ以上を実現するには３．５％以下であることが必要で
ある。In addition, if the amount of molybdenum added is 1.0% or more, corrosion resistance with practically no problem can be obtained, and the magnetic flux density is 9000.
In order to achieve G or more, it is necessary that it be 3.5% or less.
以上のことから、アルパーム合金において、モリブデン
１．０〜３．５％、アルミニウム１２．５〜１４．０％
の組成範囲で、磁束密度９０００Ｇ以上、抗磁力０．１
０ｅ以下の磁性合金材料を得ることができ、また急冷温
度を５７０〜６４０℃の範囲に選択することにより、よ
り優れた磁気特性を有するアルパーム合金を得ることが
できる。From the above, in Alperm alloy, molybdenum is 1.0 to 3.5% and aluminum is 12.5 to 14.0%.
composition range, magnetic flux density 9000G or more, coercive force 0.1
A magnetic alloy material with a temperature of 0e or less can be obtained, and by selecting the quenching temperature in the range of 570 to 640°C, an alperm alloy with better magnetic properties can be obtained.
鉄−アルミニウム合金は、アルミニウムの比率が１６％
まで冷間圧延が可能であるから、アルミニウムの比率が
１２．５〜１４．０％のこの発明の磁性合金では５０ミ
クロンの厚さまで冷間圧延が可能となり、渦電流損を小
さくすることができる。Iron-aluminum alloy has an aluminum ratio of 16%
Since the magnetic alloy of this invention with an aluminum ratio of 12.5 to 14.0% can be cold rolled to a thickness of 50 microns, it is possible to reduce eddy current loss. .
この発明の磁性合金は、磁歪が比較的大きいため、透磁
率を余り必要としない飽和磁束密度を要求される消去ヘ
ッド、録音ヘッドなどの磁気ヘッド材料として最適であ
る。Since the magnetic alloy of the present invention has a relatively large magnetostriction, it is ideal as a material for magnetic heads such as erasing heads and recording heads that require saturation magnetic flux density without requiring much magnetic permeability.
第４図にこの発明の磁性合金材料と磁束密度７５００Ｇ
のアルパーム合金とを消去ヘッドに用いて、消去電流に
対する消去率の比較特性図を示す。Figure 4 shows the magnetic alloy material of this invention and the magnetic flux density of 7500G.
A comparison characteristic diagram of erasing rate versus erasing current is shown using Alperm alloy as an erasing head.
この比較実験の消去ヘッドは、ギャップ長４０μｍ・ギ
ャップ間隔０．４１１１のセミダブル構成とし、板厚０
．１１１の薄板を２１重積層した磁気回路で行なわれた
ものである。The erasing head used in this comparative experiment had a semi-double configuration with a gap length of 40 μm and a gap distance of 0.4111, and a plate thickness of 0.
．． This was done using a magnetic circuit made up of 21 stacked layers of 111 thin plates.
その結果、この発明の磁性合金材料が用いられた消去ヘ
ッドでは消去率の改善が行なわれ、特に消去電流の大き
い部分（磁気コアが飽和に近い部分）での消去効果の改
善が著しく、第４図において、従来のアルパーム合金を
用いた消去ヘッドよりこの発明の組成を有する磁性合金
材料を用いた消去ヘッドが、消去電流１５ＡＴで約６ｄ
Ｂの消去率の向上が確認された。また、同時に塩水噴霧
試験、浸水試験を行った結果、錆び等の発生は検出され
ず、耐蝕性にも優れていることが確認された。As a result, the erasing head using the magnetic alloy material of the present invention has an improved erasing rate, and the erasing effect is particularly markedly improved in the area where the erasing current is large (the area where the magnetic core is close to saturation). In the figure, the erase head using the magnetic alloy material having the composition of the present invention is superior to the erase head using the conventional Alperm alloy by about 6 d at an erase current of 15 AT.
An improvement in the erasure rate of B was confirmed. Furthermore, as a result of simultaneously conducting salt spray tests and water immersion tests, no occurrence of rust or the like was detected, and it was confirmed that the product had excellent corrosion resistance.
以上の説明から明らかなように、この発明はモリブデン
１．０〜３．５％、アルミニウム１２．５〜１４．０％
、以下残部鉄より構成された鉄合金であって、耐蝕性、
耐摩耗性および磁気特性に優れたものであるから、磁気
ヘッド用に最適な磁性合金である。As is clear from the above explanation, this invention has a structure in which molybdenum is 1.0 to 3.5% and aluminum is 12.5 to 14.0%.
, an iron alloy consisting of the remainder iron, with corrosion resistance,
It is an optimal magnetic alloy for magnetic heads because it has excellent wear resistance and magnetic properties.
第１図（ａ）はモリブデン２％、３％、４％で残部鉄よ
りなるアルパーム合金のアルミニウムの比率に対する磁
束密度の関係を示す図、第１図（ｂｌはモリブデン３％
、残部鉄よりなるアルパーム合金のアルミニウムの比率
に対する抗磁力と熱処理との関係を示す図、第２図はモ
リブデン３％、残部鉄よりなるアルパーム合金のアルミ
ニウムの比率に対する磁束密度と熱処理との関係を示す
図、第３図はモリブデン２％、アルミニウム１３．５％
、残部鉄よりなるアルパーム合金の急冷温度と磁気特性
を示す出、第４図は、この発明の磁性合金と磁束密度７
５００Ｇのアルパーム合金を消去へ・ノドに用いた消去
率を比較した特性図である。
特許出願人 パイニオア株式会社
−一÷４４（ｗｔ％）
（ｂ）
→Ａｔ （ｗ↑％）
揶２図
７アユ−、し Ｍｏ３％
８ −一一一″’＜−ヘー〜−−−
の
↑ 芦職
→患神Ａ幻先Figure 1 (a) is a diagram showing the relationship between the magnetic flux density and the aluminum ratio of Alperm alloys consisting of 2%, 3%, and 4% molybdenum and the balance iron.
Figure 2 shows the relationship between coercive force and heat treatment with respect to the aluminum ratio of an alperm alloy consisting of 3% molybdenum and balance iron. The figure shown in Figure 3 is 2% molybdenum and 13.5% aluminum.
Figure 4 shows the quenching temperature and magnetic properties of the Alperm alloy, the balance of which is iron.
It is a characteristic diagram comparing erasing rates using 500G Alperm alloy for erasing and throat. Patent applicant Painioa Co., Ltd. - 1 ÷ 44 (wt%) (b) →At (w↑%) 涶2Fig7Ayu-,shi Mo3% 8-111'''<-Heh~--- ↑ Ashi job → patient god A phantom destination
Claims (1)
１４．０％、以下残部鉄より構成される耐蝕性、耐摩耗
性に優れ、かつ磁束密度の高い磁気ヘッド用合金。Molybdenum 1.0~3.5%, Aluminum 12.5~
An alloy for magnetic heads that has excellent corrosion resistance, wear resistance, and high magnetic flux density and is composed of 14.0% iron and the remainder iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58116861A JPS609856A (en) | 1983-06-30 | 1983-06-30 | Alloy for magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58116861A JPS609856A (en) | 1983-06-30 | 1983-06-30 | Alloy for magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS609856A true JPS609856A (en) | 1985-01-18 |
Family
ID=14697440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58116861A Pending JPS609856A (en) | 1983-06-30 | 1983-06-30 | Alloy for magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS609856A (en) |
-
1983
- 1983-06-30 JP JP58116861A patent/JPS609856A/en active Pending
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