JPS644575B2 - - Google Patents
Info
- Publication number
- JPS644575B2 JPS644575B2 JP58201093A JP20109383A JPS644575B2 JP S644575 B2 JPS644575 B2 JP S644575B2 JP 58201093 A JP58201093 A JP 58201093A JP 20109383 A JP20109383 A JP 20109383A JP S644575 B2 JPS644575 B2 JP S644575B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- alloy
- alperm
- aluminum
- flux density
- 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
Links
- 239000000956 alloy Substances 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 21
- 230000004907 flux Effects 0.000 claims description 18
- 229910045601 alloy Inorganic materials 0.000 claims description 17
- 229910052782 aluminium Inorganic materials 0.000 claims description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 16
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims description 10
- 239000011733 molybdenum Substances 0.000 claims description 10
- 238000005260 corrosion Methods 0.000 claims description 9
- 230000007797 corrosion Effects 0.000 claims description 9
- 229910001017 Alperm Inorganic materials 0.000 description 18
- 229910001004 magnetic alloy Inorganic materials 0.000 description 12
- 239000000203 mixture Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 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
- 230000000052 comparative effect Effects 0.000 description 2
- 239000011162 core material Substances 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
- 238000005097 cold rolling Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect 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
- 230000035699 permeability Effects 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
- Magnetic Heads (AREA)
- Hard Magnetic Materials (AREA)
- Soft Magnetic Materials (AREA)
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
優れた磁気ヘツ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 improvements in alperm alloys used in magnetic heads, which have excellent corrosion resistance, wear resistance, and magnetic properties.
従来、磁気ヘツドの磁心（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―亜鉛系のフエライトとパーマ
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, and typical examples include manganese-zinc ferrite, permalloy, and magnetic alloys such as sendust and alperm.
しかしながら、マンガン―亜鉛系のフエライト
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、耐摩耗性に
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つた。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
点があつた。 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 and wear resistance, but it cannot be processed easily. It had the disadvantage of extremely poor performance 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、磁気ヘツドに用いられる
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, each of the conventional magnetic alloy materials has advantages and disadvantages, but the magnetic material used in the magnetic head is 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
る磁気ヘツド用合金を提案しているが、この磁気
ヘツド用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 alloy are 7000~8000G
It has a magnetic flux density of
一方、近年磁気テープ材料の急速な開発にあつ
て、たとえばメタルテープに代表されるように抗
磁力1000Oe以上の高抗磁力の磁気テープが出現
したため、これに伴つて磁速密度9000G以上の磁
気特性を有する磁気ヘツドの磁性材料が必要にせ
がまれている。 On the other hand, in recent years, with the rapid development of magnetic tape materials, magnetic tapes with high coercive force of 1000 Oe or more, as typified by metal tapes, have appeared. There is a need for magnetic materials for magnetic heads with
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, the present invention was made in view of the above-mentioned points, and its purpose is to improve the conventional Alperm and provide a magnetic alloy with a 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
ることにより磁速密度を高くすると共に、加工性
を向上し冷間圧延で50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を小さくし磁気ヘツド用に適した磁性
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 reducing corrosion resistance, thereby increasing the magnetic velocity density, improving workability, and obtaining a thin plate of about 50 microns by cold rolling. The purpose of the present invention is to provide a magnetic alloy suitable for magnetic heads by improving the magnetic head to reduce overcurrent loss in the high frequency region and by optimally selecting heat treatment conditions to reduce the coercive force Hc.
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ａ，ｂに示されるように変化する。この第
１図ａ，ｂにおいて、抗磁力Hcはアルミニウム
12.5％付近から急激に減少し、0.1Oe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
9000G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 as follows:
It changes as shown in FIGS. 1a and 1b. In Figure 1 a and b, the coercive force Hc is aluminum
It rapidly decreased from around 12.5% to less than 0.1 Oe,
Also, the magnetic flux density B is proportional to the iron ratio, and the magnetic flux density
It is understood that the limit for obtaining 9000G is around 14.0% aluminum.
印加磁界10Oeでの磁束密度B10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
はアニールで行つた方が高いが、後述する如く、
規則格子が生成するため抗磁力Hcも高くなる。
磁気ヘツド用材料としては抗磁力Hc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つて
行なう場合、磁束密度B10は第１図ａのようにな
り、9000G以上の磁束密度B10を有する組成はア
ルミニウム14％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Hcの差はこの組成範囲では確認
されなかつた。 Considering only the magnetic flux density B 10 at an applied magnetic field of 10 Oe, it is higher to heat treat Alperm alloy by annealing as shown in Figure 2, but as will be explained later,
Since a regular lattice is generated, the coercive force Hc also increases.
As a material for a magnetic head, it is necessary that the coercive force Hc is 0.15 or less, and for this purpose it is necessary to harden it. When the heat treatment is performed by hardening, the magnetic flux density B 10 becomes as shown in FIG. Furthermore, the coercive force Hc is 0.15 or less when aluminum is 12.5% or more. Note that no difference in coercive force Hc depending on the amount of molybdenum added was observed in this composition range.
一方、鉄―アルミニウム合金は、合金組成
Fe3Al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℃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0.1Oe
が実現される。 On the other hand, iron-aluminum alloy has an alloy composition of
It is known that a regular lattice of Fe 3 Al is generated, and it is necessary to perform rapid cooling heat treatment from a temperature above this phase transformation point. In the case of the composition of the present invention, as shown in Figure 2, the density of magnetic flux decreases at a temperature of 570°C or higher.
Over 9000G, coercive force 0.1Oe at temperatures below 640℃
is realized.
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9000G以上を実現するには3.5％以下である
ことが必要である。 Furthermore, if the amount of molybdenum added is 1.0% or more, practically acceptable corrosion resistance can be obtained, and in order to achieve a magnetic flux density of 9000G or more, it must 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
0.1Oe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
A magnetic alloy material of 0.1 Oe 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 alloys can be cold rolled up to a 16% aluminum content, so the magnetic alloy of this invention with an aluminum content of 12.5 to 14.0% can be cold rolled to a thickness of 50 microns. Current loss can be reduced.
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
求される消去ヘツド、録音ヘツドなどの磁気ヘツ
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 most suitable as a magnetic head material for erasing heads, recording heads, etc., which require saturation magnetic flux density without requiring much magnetic permeability.
第４図は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ツドに用い
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 and magnetic flux density of this invention.
A comparative characteristic diagram of erasing rate versus erasing current is shown using 7500G Alperm alloy as the erasing head.
この比較実験の消去ヘツドは、ギヤツプ長
40μm、ギヤツプ間隔0.4mmのセミダブル構成と
し、板厚0.1mmの薄板を21枚積層した磁気回路で
行なわれたものである。 The cancellation head for this comparative experiment was determined by the gap length
It has a semi-double configuration with a gap distance of 40 μm and a gap of 0.4 mm, and is implemented using a magnetic circuit made of 21 laminated thin plates with a thickness of 0.1 mm.
その結果、この発明の磁性合金材料が用いられ
た消去ヘツ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ツドよ
りこの発明の組成を有する磁性合金材料を用いた
消去ヘツドが、消去電流15ATで約6dBの消去率
の向上が確認された。また、同時に塩水噴霧試
験、浸水試験を行つた結果、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, it was confirmed that the erasing head using the magnetic alloy material having the composition of the present invention has an erasing rate improved by about 6 dB at an erasing current of 15 AT compared to the erasing head using the conventional Alperm alloy. Furthermore, as a result of simultaneously conducting a salt spray test and a water immersion test, 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つて、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、磁気ヘツド用に最適な磁性合金である。 As is clear from the above description, this invention has molybdenum of 1.0 to 3.5%, aluminum of 12.5 to 14.0%,
It is an iron alloy with the remainder being iron and has excellent corrosion resistance, abrasion resistance, and magnetic properties, making it an optimal magnetic alloy for magnetic heads.
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ｂ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7500Gのアルパーム合金を消去ヘツドに用い
た消去率を比較した特性図である。
Figure 1a shows the relationship between magnetic flux density and aluminum ratio for Alperm alloys containing 2%, 3%, and 4% molybdenum with the balance being iron, and Figure 1b shows the relationship between the magnetic flux density and the aluminum ratio for Alperm alloys containing 3% molybdenum and balance iron. Figure 2 shows the relationship between coercive force and heat treatment with respect to the aluminum ratio. Figure 2 is a diagram showing the relationship between magnetic flux density and heat treatment with respect to the aluminum ratio of an Alperm alloy consisting of 3% molybdenum and the balance iron.
The figure shows the quenching temperature and magnetic properties of an Alperm alloy consisting of 2% molybdenum, 13.5% aluminum, and the balance iron. Figure 4 shows an eraser using the magnetic alloy of the present invention and an Alperm alloy with a magnetic flux density of 7500G in the erase head. It is a characteristic diagram comparing rates.
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ツド用合
金。1 Molybdenum 1.0~3.5%, Aluminum 12.5~
An alloy for magnetic heads with excellent corrosion resistance, wear resistance, and high magnetic flux density, consisting of 14.0% iron and the remainder iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58201093A JPS6096748A (en) | 1983-10-28 | 1983-10-28 | Alloy for magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58201093A JPS6096748A (en) | 1983-10-28 | 1983-10-28 | Alloy for magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6096748A JPS6096748A (en) | 1985-05-30 |
| JPS644575B2 true JPS644575B2 (en) | 1989-01-26 |
Family
ID=16435277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58201093A Granted JPS6096748A (en) | 1983-10-28 | 1983-10-28 | Alloy for magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6096748A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51146320A (en) * | 1975-06-11 | 1976-12-15 | Canon Inc | High permeability alloys |
| JPS5360815A (en) * | 1976-11-12 | 1978-05-31 | Pioneer Electronic Corp | Iron alloy for magnetic cores |
-
1983
- 1983-10-28 JP JP58201093A patent/JPS6096748A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6096748A (en) | 1985-05-30 |
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