JPS6128018B2 - - Google Patents
Info
- Publication number
- JPS6128018B2 JPS6128018B2 JP57161590A JP16159082A JPS6128018B2 JP S6128018 B2 JPS6128018 B2 JP S6128018B2 JP 57161590 A JP57161590 A JP 57161590A JP 16159082 A JP16159082 A JP 16159082A JP S6128018 B2 JPS6128018 B2 JP S6128018B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- tape
- alloy
- acid
- wear
- 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 11
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 230000035699 permeability Effects 0.000 claims description 10
- 229910052790 beryllium Inorganic materials 0.000 claims description 8
- 229910052732 germanium Inorganic materials 0.000 claims description 7
- 229910052741 iridium Inorganic materials 0.000 claims description 7
- 229910052697 platinum Inorganic materials 0.000 claims description 7
- 229910052707 ruthenium Inorganic materials 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 239000002253 acid Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 4
- 229910002796 Si–Al Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Soft Magnetic Materials (AREA)
Description
本発明は、耐摩耗性の優れた磁気ヘツド用高透
磁率合金に関するものである。これ迄、磁気ヘツ
ド用材料としてはフエライトが主流をなしている
が、近年磁気テープとして金属テープが用いられ
るようになり、高透磁率、高飽和磁束密度でかつ
耐摩耗性の良いFe−Si−Al系合金磁性材料が磁
気ヘツド材として注目されている。
６〜12wt％Si、３〜8wt％Al、残Feの組成を有
するFe−Si−Al合金磁性材料は、透磁率、固有
抵抗、飽和磁束密度が高く耐摩耗性も良好である
ので、磁気ヘツド材として適している。
ところで、磁気ヘツドに摺接する磁気録音テー
プは、テープの種類により、塩酸、硝酸、硫酸等
の遊離酸を含んでいる。従つて、コア材は磁気テ
ープとの摺接により常に酸性雰囲気にさらされ、
酸腐蝕を受け、これにより耐摩耗性が劣化する。
本発明は、このような点に鑑み、Fe−Si−Al
合金磁性材料の耐酸性を向上し、もつて飽和磁束
密度、透磁率が高く、しかも磁気テープによる酸
腐蝕を受けない磁気ヘツドを提供しようとするも
のである。
本発明は、４〜12wt％Si、３〜8wt％Al、残Fe
の組成に、Ru、IrおよびPtの少なくとも一種で
合計0.01〜2wt％と、01〜3wt％Tiと、0.005〜
2wt％Beと、0.1〜2.5wt％Geとを共同添加したこ
とを特徴とする耐摩耗性高透磁率合金である。
ここで、Ti、BeおよびGeは、磁気特性および
硬度を高めるために添加するものであり、
Ti0.1wt％未満、Be0.05wt％未満、Ge0.1wt％未
満では硬度を高める効果がなく、また、Tiが3wt
％、Beが2wt％、Geが2.5wt％をそれぞれ越える
と、合金の脆性が増し、もろくなつて加工が困難
になり、また実効透磁率が劣化する。従つて、
Tiは0.1〜3wt％、Beは0.005〜2wt％、Geは0.1〜
2.5wt％に、それぞれ限定される。
また、Ru、Ir、Ptは耐酸性を高めるために添
加するもので、これらは単独で添加されても、複
合して添加されても良いが、合計が0.01wt％に満
たないときは耐酸性の極だつた効果が認められ
ず、2wt％を越えると、合金の実効透磁率が劣化
する。従つて、Ru、Ir、Ptの合計添加量は0.01〜
2wt％に限定される。
以下、本発明を実施例について説明する。
第１表にNo.1〜No.4で示す組成を有する各合
金を、真空溶解によつて製造した。鋳造したイ
The present invention relates to a high magnetic permeability alloy for magnetic heads that has excellent wear resistance. Until now, ferrite has been the mainstream material for magnetic heads, but in recent years metal tapes have come into use as magnetic tapes. Al-based alloy magnetic materials are attracting attention as magnetic head materials. Fe-Si-Al alloy magnetic materials with a composition of 6 to 12 wt% Si, 3 to 8 wt% Al, and the remainder Fe have high magnetic permeability, resistivity, saturation magnetic flux density, and good wear resistance, so they are suitable for magnetic heads. Suitable as a material. By the way, magnetic recording tapes that come into sliding contact with magnetic heads contain free acids such as hydrochloric acid, nitric acid, and sulfuric acid, depending on the type of tape. Therefore, the core material is constantly exposed to an acidic atmosphere due to sliding contact with the magnetic tape.
Subject to acid corrosion, which deteriorates wear resistance. In view of these points, the present invention has developed Fe-Si-Al
The object of the present invention is to provide a magnetic head that improves the acid resistance of the alloy magnetic material, has high saturation magnetic flux density and magnetic permeability, and is not susceptible to acid corrosion caused by magnetic tape. The present invention consists of 4 to 12 wt% Si, 3 to 8 wt% Al, and the remainder Fe.
In the composition, a total of 0.01~2 wt% of at least one of Ru, Ir and Pt, 01~3 wt% Ti, and 0.005~
This is a wear-resistant high magnetic permeability alloy characterized by the joint addition of 2wt% Be and 0.1 to 2.5wt% Ge. Here, Ti, Be and Ge are added to improve magnetic properties and hardness,
Less than 0.1wt% of Ti, less than 0.05wt% of Be, and less than 0.1wt% of Ge have no effect on increasing hardness;
%, Be exceeds 2wt%, and Ge exceeds 2.5wt%, respectively, the brittleness of the alloy increases, making it brittle and difficult to process, and the effective magnetic permeability deteriorates. Therefore,
Ti is 0.1-3wt%, Be is 0.005-2wt%, Ge is 0.1-3wt%
Each is limited to 2.5wt%. Additionally, Ru, Ir, and Pt are added to increase acid resistance, and they may be added alone or in combination, but if the total is less than 0.01wt%, acid resistance No significant effect was observed, and when the amount exceeds 2wt%, the effective magnetic permeability of the alloy deteriorates. Therefore, the total amount of Ru, Ir, and Pt added is 0.01~
Limited to 2wt%. Hereinafter, the present invention will be explained with reference to examples. Each alloy having the composition shown in Table 1 as No. 1 to No. 4 was manufactured by vacuum melting. The cast iron
【表】
ンゴツトの巣のない部分から、厚さ10mm、直径30
mmの円盤を切り出し、＃3000の砥粒のバフを用い
表面を研磨して耐酸試験のための試料とした。
耐酸試験に用いる腐蝕液を決めるため、磁気テ
ープの遊離酸を調査したところ、磁気テープの種
類により、塩酸性、硝酸性、硫酸性等、種種認め
られたが、一応容量比１％の硫酸液を用いた。
耐酸試験は、腐蝕液500c.c.中に試料を入れ室温
に100時間保持することによつて行ない、耐酸性
は腐蝕液に溶け出したFe量によつて評価した。
溶出したFe分は湿式定量分析によつて測定し
た。その測定結果は第１表に示すとおりである。
第１表において、No.1とNo.2〜４の試料の比
較、および、No.5とNo.6〜14の試料の比較から
Ru、Ir、Ptの添加によつて、Fe溶出量が減少す
ること、即ち耐酸性が向上することがわかる。
また、各試料の硬度（ビツカース硬度）Hvお
よび、実効透磁率を測定し、第１表に示した。な
お、実効透磁率は、板厚0.2mm、外径８mm、内径
４mmのリング試料について、1MHzにおいて測定
した。
次に、第１表No.1〜14の各合金材料を用い、
0.2mm厚の板を切り出し、磁気ヘツドを試作し、
カセツトテープレコーダに実装し、テープ走行接
触面の実動作摩耗試験を行なつた。条件は、用い
る磁気テープはγ−Fe2O3テープで、テープ速度
4.75cm／秒、走行時間1000時間とした。試験は、
オートリバース型カセツトデツキを用い、連続
100時間走行毎にテープを交換する方法で行なわ
れた。1000時間経過後、触針型タリサーフを用
い、ヘツド面の摩耗量を測定した。測定値は、第
１表に示す通りである。この結果から明らかなよ
うに、Ti、Be、Geの添加により摩耗量が少なく
なるが、一方、Ti、Be、Geと、Ru、Ir、Ptとの
相乗効果が認められる。
以上の様に、本発明によれば、Fe−Si−Al合
金磁性材料に、Ti、Be、GeとRu、Ir、Ptを前述
した範囲の量添加することにより実効透磁率の特
性をそこなうことなくテープ走行時のヘツド摺動
部の摩耗量を著しく減少させ、ヘツドの長寿命化
に寄与するものである。[Table] Thickness 10mm, diameter 30mm from the part where there is no nest of Ngotsuto
A disk of mm diameter was cut out, and the surface was polished using a buff with #3000 abrasive grains to prepare a sample for the acid resistance test. In order to determine the corrosive liquid to be used in the acid resistance test, we investigated the free acid content of the magnetic tape, and found that it varied depending on the type of magnetic tape, such as hydrochloric acid, nitric acid, and sulfuric acid. was used. The acid resistance test was conducted by placing the sample in 500 c.c. of corrosive liquid and keeping it at room temperature for 100 hours, and acid resistance was evaluated by the amount of Fe dissolved into the corrosive liquid.
The eluted Fe content was measured by wet quantitative analysis. The measurement results are shown in Table 1.
In Table 1, from the comparison of samples No. 1 and Nos. 2 to 4, and the comparison of No. 5 and samples No. 6 to 14,
It can be seen that the addition of Ru, Ir, and Pt reduces the amount of Fe elution, that is, improves acid resistance. In addition, the hardness (Vickers hardness) Hv and effective magnetic permeability of each sample were measured and shown in Table 1. Note that the effective magnetic permeability was measured at 1 MHz for a ring sample with a plate thickness of 0.2 mm, an outer diameter of 8 mm, and an inner diameter of 4 mm. Next, using each alloy material No. 1 to 14 in Table 1,
Cut out a 0.2mm thick plate and make a prototype magnetic head.
We installed it in a cassette tape recorder and conducted an actual operational wear test on the tape running contact surface. The conditions are that the magnetic tape used is γ-Fe 2 O 3 tape, and the tape speed is
The running time was 4.75cm/sec and 1000 hours. The exam is
Continuously using an auto-reverse type cassette deck
The tape was replaced every 100 hours. After 1000 hours had passed, the amount of wear on the head surface was measured using a stylus type Talysurf. The measured values are shown in Table 1. As is clear from these results, the amount of wear is reduced by adding Ti, Be, and Ge, but on the other hand, a synergistic effect between Ti, Be, and Ge and Ru, Ir, and Pt is observed. As described above, according to the present invention, by adding Ti, Be, Ge, Ru, Ir, and Pt in the above-mentioned amounts to the Fe-Si-Al alloy magnetic material, the effective magnetic permeability characteristic can be impaired. This significantly reduces the amount of wear on the sliding parts of the head during tape running, contributing to longer life of the head.
Claims (1)
にRu、IrおよびPtの少なくとも一種で合計0.01〜
2wt％と、0.1〜3wt％Tiと、0.05〜2wt％Beと、
0.1〜2.5wt％Geとを共同添加したことを特徴とす
る耐摩耗性高透磁率合金。1 1.4 to 12 wt% Si, 3 to 8 wt% Al, and the remaining Fe contains at least one of Ru, Ir, and Pt with a total of 0.01 to
2wt%, 0.1~3wt%Ti, 0.05~2wt%Be,
A wear-resistant high permeability alloy characterized by co-adding 0.1 to 2.5 wt% Ge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57161590A JPS5953654A (en) | 1982-09-18 | 1982-09-18 | Wear resistant alloy with high magnetic permeability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57161590A JPS5953654A (en) | 1982-09-18 | 1982-09-18 | Wear resistant alloy with high magnetic permeability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5953654A JPS5953654A (en) | 1984-03-28 |
| JPS6128018B2 true JPS6128018B2 (en) | 1986-06-28 |
Family
ID=15738021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57161590A Granted JPS5953654A (en) | 1982-09-18 | 1982-09-18 | Wear resistant alloy with high magnetic permeability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5953654A (en) |
-
1982
- 1982-09-18 JP JP57161590A patent/JPS5953654A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5953654A (en) | 1984-03-28 |
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