JP2000087192A - FLAT Fe-BASE ALLOY POWDER FOR MAGNETIC SHIELDING - Google Patents
FLAT Fe-BASE ALLOY POWDER FOR MAGNETIC SHIELDINGInfo
- Publication number
- JP2000087192A JP2000087192A JP10263189A JP26318998A JP2000087192A JP 2000087192 A JP2000087192 A JP 2000087192A JP 10263189 A JP10263189 A JP 10263189A JP 26318998 A JP26318998 A JP 26318998A JP 2000087192 A JP2000087192 A JP 2000087192A
- Authority
- JP
- Japan
- Prior art keywords
- alloy powder
- flat
- based alloy
- total
- balance
- 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
- 239000000843 powder Substances 0.000 title claims abstract description 59
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 42
- 239000000956 alloy Substances 0.000 title claims abstract description 42
- 239000002245 particle Substances 0.000 claims abstract description 21
- 239000012535 impurity Substances 0.000 claims abstract description 15
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 15
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 15
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims 1
- 230000005415 magnetization Effects 0.000 abstract description 17
- 239000000203 mixture Substances 0.000 abstract description 15
- 229910052759 nickel Inorganic materials 0.000 abstract description 4
- 230000001174 ascending effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 39
- 230000000694 effects Effects 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010298 pulverizing process Methods 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000009692 water atomization Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 229910017082 Fe-Si Inorganic materials 0.000 description 1
- 229910017116 Fe—Mo Inorganic materials 0.000 description 1
- 229910017133 Fe—Si Inorganic materials 0.000 description 1
- 229910000756 V alloy Inorganic materials 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Soft Magnetic Materials (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、コンピュータ周
辺の各種磁気記録装置や電子機器などを磁場や電磁波の
悪影響から保護するために、塗料と共に塗布して磁気シ
ールド用層や磁気シールド用シートなどの形成に用いら
れる偏平状Ｆｅ基合金粉末に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic shielding layer and a magnetic shielding sheet which are applied together with a paint to protect various magnetic recording devices and electronic devices around a computer from the adverse effects of magnetic fields and electromagnetic waves. The present invention relates to a flat Fe-based alloy powder used for formation.
【０００２】[0002]
【従来の技術】従来、原子％で（以下、％は原子％を示
す）、Ｓｉ：２〜７％、Ａｌ：３〜８％を含有し、さら
に必要に応じてＮｉ：６％以下を含有し、残りがＦｅと
不可避不純物からなる組成を有する磁気シールド用偏平
状Ｆｅ基合金粉末が知られている（特開平２−４２７９
８号公報参照）。また、上記従来の磁気シールド用偏平
状Ｆｅ基合金粉末は、その他多くのものが、実用に際し
て、 平均厚さ（以下、「ｄ」で示す）：０．０２〜０．６μ
ｍ、 粒度部分布計によって求められた粒径の小さい方から重
量を累計して５０％になったときの粒径（以下、
「Ｄ50」で示す）：３〜６０μｍ、 アスペクト比（Ｄ50／ｄ）：２０〜５００、 の粒度に調整されて使用されることも良く知られるとこ
ろである。2. Description of the Related Art Conventionally, in terms of atomic% (hereinafter,% indicates atomic%), Si: 2 to 7%, Al: 3 to 8%, and Ni: 6% or less as required. A flat Fe-based alloy powder for a magnetic shield having a composition comprising the remainder of Fe and unavoidable impurities is known (JP-A-2-4279).
No. 8). In addition, many of the conventional flat Fe-based alloy powders for magnetic shielding described above have an average thickness (hereinafter referred to as “d”) of 0.02 to 0.6 μm in practical use.
m, the particle size when the weight is accumulated to 50% from the smaller particle size obtained by the particle size distribution analyzer (hereinafter, referred to as
It indicated by "D 50"): 3~60μm, an aspect ratio (D 50 / d): 20~500 , it is where also known to be adjusted to the particle size in use.
【０００３】[0003]
【発明が解決しようとする課題】一方、近年の磁気記録
装置や電子機器の小型化および薄型化はめざましく、こ
れに伴ない、磁気シールド用性能の一段の向上、並びに
磁気シールド用層および磁気シールド用シートなどの薄
肉化が要求されている。このような要請に対して、より
高い飽和磁化およびより低い保磁力を示す磁気シールド
用粉末の開発が望まれている。さらに磁気シールド層お
よび磁気シールドシートは、実用に際して長期間安定な
シールド性能を維持する必要がある。したがって前記磁
気記録装置などが設置されるる環境下で長期間錆の発生
がなく飽和磁化が低下しない磁気シールド用粉末が求め
られている。On the other hand, in recent years, the size and thickness of magnetic recording devices and electronic devices have been remarkably reduced, and accordingly, the magnetic shielding performance has been further improved, and the magnetic shielding layer and the magnetic shielding have been improved. There is a demand for thinner sheets and the like. In response to such demands, development of a magnetic shielding powder exhibiting higher saturation magnetization and lower coercive force has been desired. Furthermore, the magnetic shield layer and the magnetic shield sheet need to maintain stable shield performance for a long time in practical use. Accordingly, there is a need for a magnetic shielding powder that does not generate rust for a long period of time and does not reduce the saturation magnetization in an environment where the magnetic recording apparatus is installed.
【０００４】[0004]
【課題を解決するための手段】そこで、本発明者等は、
上述のような観点から、上記従来の磁気シールド用偏平
状Ｆｅ基合金粉末よりも一層高い飽和磁化および一層低
い保磁力を示すと共に、腐食環境下に置かれても腐食し
て飽和磁化が低下することのない磁気シールド用粉末を
得るべく研究を行なった結果、（イ）Ｖ、ＭｏまたはＷ
は、Ｆｅに対する固溶硬化能が大きく、これら元素を少
量の添加により、粉砕されやすくなって磁気シールド用
偏平状Ｆｅ基合金粉末の粉砕および偏平化のための処理
時間を短縮することができ、このため粉末に蓄積される
歪みが小さくなって低い保磁力を得ることができると共
に高い飽和磁化を合わせて実現できること、（ロ）ま
た、Ｖ、ＭｏまたはＷの少量の添加により耐食性も改善
され、通常の磁気シールド用途で錆や変色の発生がな
く、磁気シールド性能が長期間低下することのない磁気
シールド用粉末が得られること、（ハ）Ｖ、Ｍｏまたは
Ｗのいずれかの含有量は０．５〜１０％の範囲内にある
ことが好ましく、さらにＶ、ＭｏおよびＷの内の２種以
上を合計でを０．５〜１０％の範囲内にあるように含有
せしめてもよく、この時のＳｉおよび／またはＡｌ含有
量は１５〜３０％にすることができること、（ニ）Ｎｉ
をさらに添加すると飽和磁化を低下させずに粉砕および
偏平化時の保磁力の増大を一層押さえることができ、耐
食性もさらに向上させることができるところから必要に
応じて添加するが、その含有量は０．１〜１０％の範囲
内にあるようにすることが好ましいこと、（ホ）かかる
成分組成の磁気シールド用偏平状Ｆｅ基合金粉末におい
て、粉末の粒度は、従来と同じｄ：０．０２〜０．６μ
ｍ、Ｄ50：３〜６０μｍ、Ｄ50／ｄ：２０〜５００の範
囲に調整すればよいこと、などの知見を得たのである。Means for Solving the Problems Accordingly, the present inventors have
From the above-mentioned viewpoint, while exhibiting higher saturation magnetization and lower coercive force than the conventional flat Fe-based alloy powder for magnetic shield, the saturation magnetization decreases due to corrosion even in a corrosive environment. As a result of conducting research to obtain a magnetic shielding powder without any problem, (a) V, Mo or W
Has a large solid solution hardening ability with respect to Fe, and by adding these elements in a small amount, it becomes easy to be pulverized, and the processing time for pulverizing and flattening the flat Fe-based alloy powder for magnetic shield can be reduced, For this reason, the strain accumulated in the powder is reduced, so that a low coercive force can be obtained and a high saturation magnetization can be realized at the same time. (B) The corrosion resistance is also improved by adding a small amount of V, Mo or W, It is possible to obtain a magnetic shielding powder which does not generate rust or discoloration in a normal magnetic shielding application and does not deteriorate magnetic shielding performance for a long period of time. (C) The content of any of V, Mo or W is 0 It is preferably in the range of 0.5 to 10%, and two or more of V, Mo and W may be contained so that the total is in the range of 0.5 to 10%. The Si and / or Al content that can be 15 to 30% (d) Ni
When further added, it is possible to further suppress the increase in coercive force during pulverization and flattening without lowering the saturation magnetization, and to further improve the corrosion resistance. (E) In the flat Fe-based alloy powder for a magnetic shield having such a component composition, the particle size of the powder is the same as that of the conventional d: 0.02. ~ 0.6μ
m, D 50 : 3 to 60 μm, and D 50 / d: 20 to 500 .
【０００５】この発明は、上記の知見にもとづいてなさ
れたものであって、（１）ＳｉおよびＡｌの内の１種ま
たは２種を合計で１５〜３０％、Ｖ：０．５〜５％、を
含有し、残りがＦｅと不可避不純物からなる組成を有す
る磁気シールド用偏平状Ｆｅ基合金粉末、（２）Ｓｉお
よびＡｌの内の１種または２種を合計で１５〜３０％、
Ｍｏ：０．５〜５％、を含有し、残りがＦｅと不可避不
純物からなる組成を有する磁気シールド用偏平状Ｆｅ基
合金粉末、（３）ＳｉおよびＡｌの内の１種または２種
を合計で１５〜３０％、Ｗ：０．５〜５％、を含有し、
残りがＦｅと不可避不純物からなる組成を有する磁気シ
ールド用偏平状Ｆｅ基合金粉末、（４）ＳｉおよびＡｌ
の内の１種または２種を合計で１５〜３０％、Ｖ、Ｍｏ
およびＷの内の２種以上を合計で０．５〜５％、を含有
し、残りがＦｅと不可避不純物からなる組成を有する磁
気シールド用偏平状Ｆｅ基合金粉末、（５）Ｓｉおよび
Ａｌの内の１種または２種を合計で１５〜３０％、Ｖ：
０．５〜５％、Ｎｉ：０．２〜１０％、を含有し、残り
がＦｅと不可避不純物からなる組成を有する磁気シール
ド用偏平状Ｆｅ基合金粉末、（６）ＳｉおよびＡｌの内
の１種または２種を合計で１５〜３０％、Ｍｏ：０．５
〜５％、Ｎｉ：０．２〜１０％、を含有し、残りがＦｅ
と不可避不純物からなる組成を有する磁気シールド用偏
平状Ｆｅ基合金粉末、（７）ＳｉおよびＡｌの内の１種
または２種を合計で１５〜３０％、Ｗ：０．５〜５％、
Ｎｉ：０．２〜１０％、を含有し、残りがＦｅと不可避
不純物からなる組成を有する磁気シールド用偏平状Ｆｅ
基合金粉末、（８）ＳｉおよびＡｌの内の１種または２
種を合計で１５〜３０％、Ｖ、ＭｏおよびＷの内の２種
以上を合計で０．５〜５％、Ｎｉ：０．２〜１０％、を
含有し、残りがＦｅと不可避不純物からなる組成を有す
る磁気シールド用偏平状Ｆｅ基合金粉末、に特徴を有す
るものである。The present invention has been made on the basis of the above findings, and (1) one or two of Si and Al in total of 15 to 30%, and V: 0.5 to 5%. And (2) one or two of Si and Al in a total amount of 15 to 30%, and a flat Fe-based alloy powder for magnetic shield having a composition consisting of Fe and unavoidable impurities.
Mo: 0.5 to 5%, and the balance is a flat Fe-based alloy powder for magnetic shielding having a composition of Fe and inevitable impurities, and (3) one or two of Si and Al in total 15 to 30%, W: 0.5 to 5%,
A flat Fe-based alloy powder for a magnetic shield having a balance of Fe and inevitable impurities, (4) Si and Al
Of 15 or 30% in total, V, Mo
And at least two of W and 0.5 to 5% in total, and the balance is a flat Fe-based alloy powder for magnetic shield having a composition consisting of Fe and inevitable impurities; (5) Si and Al 15 to 30% of one or two of them in total, V:
0.5 to 5%, Ni: 0.2 to 10%, and the balance is a flat Fe-based alloy powder for a magnetic shield having a composition of Fe and unavoidable impurities, (6) Si and Al 15 to 30% of one or two in total, Mo: 0.5
-5%, Ni: 0.2-10%, the balance being Fe
And (7) one or two of Si and Al in a total of 15 to 30%, W: 0.5 to 5%,
Ni: 0.2 to 10%, the balance being flat Fe for magnetic shielding having a composition of Fe and inevitable impurities.
Base alloy powder, (8) one or two of Si and Al
15 to 30% of the total, 0.5 to 5% of the total of two or more of V, Mo and W, and 0.2 to 10% of Ni. A flat Fe-based alloy powder for a magnetic shield having the following composition:
【０００６】さらに、前記（１）〜（８）記載の磁気シ
ールド用偏平状Ｆｅ基合金粉末は、ｄ：０．０２〜０．
６μｍ、Ｄ50：３〜６０μｍ、Ｄ50／ｄ：２０〜５００
の範囲に調整された粒度を有することが一層好ましい。
従って、この発明は、（９）前記（１）、（２）、
（３）、（４）、（５）、（６）、（７）または（８）
記載の組成、並びにｄ：０．０２〜０．６μｍ、Ｄ50：
３〜６０μｍ、Ｄ50／ｄ：２０〜５００の範囲に調整さ
れた粒度を有する磁気シールド用偏平状Ｆｅ基合金粉
末、に特徴を有するものである。Furthermore, the flat Fe-based alloy powder for a magnetic shield according to the above (1) to (8), wherein d: 0.02 to 0.
6μm, D 50: 3~60μm, D 50 / d: 20~500
It is more preferable to have the particle size adjusted in the range of
Therefore, the present invention provides (9) the above (1), (2),
(3), (4), (5), (6), (7) or (8)
The composition described, and d: 0.02-0.6 μm, D 50 :
It is characterized by a flat Fe-based alloy powder for a magnetic shield having a particle size adjusted to a range of 3 to 60 μm and D 50 / d: 20 to 500 .
【０００７】この発明の磁気シールド用偏平状Ｆｅ基合
金粉末は、ＳｉおよびＡｌの内の１種または２種を合計
で１５〜３０％、Ｖ、ＭｏおよびＷの内の１種または２
種以上を合計で０．５〜５％、さらに必要に応じてＮ
ｉ：０．２〜１０％を含有し、残りがＦｅと不可避不純
物からなる組成を有するＦｅ基合金溶湯を水アトマイズ
法により粉末化し、得られた粉末に対して、通常の条件
で分級、偏平化、熱処理、および分級を施すこと、すな
わち前記水アトマイズ粉末を分級により４０μｍ以下の
粒径とし、これをアトライタで偏平化した後、Ａｒ雰囲
気中、３５０〜７５０℃の温度に所定時間保持の熱処理
を施し、引続いて分級を行なって、 ｄ：０．０２〜０．６μｍ、 Ｄ50：３〜６０μｍ、 Ｄ50／ｄ：２０〜５００、 に粒度調整することにより製造することができる。The flat Fe-based alloy powder for a magnetic shield according to the present invention comprises 15 to 30% in total of one or two of Si and Al, and one or two of V, Mo and W.
0.5% to 5% in total of the seeds or more, and if necessary, N
i: A Fe-based alloy melt containing 0.2 to 10% and having a balance of Fe and inevitable impurities is powderized by a water atomizing method, and the obtained powder is classified and flattened under ordinary conditions. , Heat treatment, and classification, that is, the water atomized powder is classified into particles having a particle size of 40 μm or less by classification, flattened with an attritor, and then maintained in an Ar atmosphere at a temperature of 350 to 750 ° C. for a predetermined time. , Followed by classification to adjust the particle size to d: 0.02 to 0.6 μm, D 50 : 3 to 60 μm, and D 50 / d: 20 to 500 .
【０００８】つぎに、この発明の偏平状Ｆｅ基合金粉末
の組成を上記の通りに限定した理由を説明する。 （ａ） ＳｉおよびＡｌ これら成分には、共に保磁力を低減する作用があるが、
その含有量が１５％未満ではその効果が小さく、一方、
その含有量が３０％を越えると飽和磁化を低下させ、い
ずれの場合にも良好な磁気シールド用性能が得られな
い。従って、この発明の偏平状Ｆｅ基合金粉末に含まれ
るＳｉおよびＡｌの内の１種または２種を合計で１５〜
３０％（望ましくは２０〜２５％）含有するように定め
た。Next, the reason why the composition of the flat Fe-based alloy powder of the present invention is limited as described above will be described. (A) Si and Al Both of these components have the effect of reducing the coercive force.
If the content is less than 15%, the effect is small, while
If the content exceeds 30%, the saturation magnetization is lowered, and in any case, good magnetic shielding performance cannot be obtained. Therefore, one or two of Si and Al contained in the flat Fe-based alloy powder of the present invention may be used in a total of 15 to 15%.
The content was determined to be 30% (preferably 20 to 25%).
【０００９】（ｂ） Ｖ、ＭｏおよびＷ これら成分は、耐食性を向上させさらに粉砕しやすい特
性を付与し、もって粉砕および偏平化時の歪みの蓄積に
よる保磁力の増大を押さえる作用があるが、その含有量
が０．５％未満ではその効果が現れず、一方、その含有
量が５％を越えると飽和磁化を著しく低下させ、いずれ
の場合にも十分な磁気シールド用性能が得られない。従
って、この発明の偏平状Ｆｅ基合金粉末に含まれるＶ、
ＭｏおよびＷの内の１種または２種以上を合計で０．５
〜５％（一層望ましくは１〜３％）と定めた。これら
Ｖ、ＭｏおよびＷの内でもＭｏが最も効果がある。(B) V, Mo and W These components have the effect of improving the corrosion resistance and imparting the property of being easily pulverized, thereby suppressing the increase in coercive force due to the accumulation of strain during pulverization and flattening. If the content is less than 0.5%, the effect is not exhibited. On the other hand, if the content exceeds 5%, the saturation magnetization is remarkably reduced, and in any case, sufficient magnetic shielding performance cannot be obtained. Therefore, V contained in the flat Fe-based alloy powder of the present invention,
One or more of Mo and W are used in total of 0.5
-5% (more preferably 1-3%). Of these V, Mo and W, Mo is the most effective.
【００１０】（ｃ） Ｎｉ Ｎｉには、粉砕および偏平化時の保磁力の増大を押さ
え、さらに耐食性を向上させる効果を有するので必要に
応じて添加するが、その含有量が０．２％未満ではその
効果が小さく、一方、Ｎｉを１０％を越えて添加しても
その作用が飽和すると共に飽和磁化が著しく低下するの
で好ましくない。従って、この発明の偏平状Ｆｅ基合金
粉末に含まれるＮｉ含有量は０．２〜１０％（一層望ま
しくは０．５〜５％）と定めた。(C) Ni Ni has an effect of suppressing an increase in coercive force during pulverization and flattening and has an effect of further improving corrosion resistance. Ni is added as necessary, but its content is less than 0.2%. In this case, the effect is small. On the other hand, even if Ni is added in excess of 10%, the effect is saturated and the saturation magnetization is remarkably reduced, which is not preferable. Therefore, the content of Ni contained in the flat Fe-based alloy powder of the present invention is determined to be 0.2 to 10% (more preferably 0.5 to 5%).
【００１１】（ｄ） 粒度 この発明の偏平状Ｆｅ基合金粉末は、従来と同じｄ：
０．０２〜０．６μｍ、Ｄ50：３〜６０μｍ、Ｄ50／
ｄ：２０〜５００の範囲に調整すればよいが、ｄ：０．
０５〜０．３μｍ、Ｄ50：５〜２０μｍ、Ｄ50／ｄ：５
０〜３００の範囲に調整することが一層好ましい。(D) Particle Size The flat Fe-based alloy powder of the present invention has the same d:
0.02 to 0.6 μm, D 50 : 3 to 60 μm, D 50 /
d: 20 to 500 may be adjusted.
05~0.3μm, D 50: 5~20μm, D 50 / d: 5
It is more preferable to adjust the range to 0 to 300.
【００１２】[0012]
【発明の実施の形態】つぎに、この発明の偏平状Ｆｅ基
合金粉末を実施例により具体的に説明する。原料とし
て、Ｆｅ−Ｓｉ合金、Ｆｅ−Ａｌ合金、Ｆｅ−Ｖ合金、
Ｆｅ−Ｍｏ合金およびＦｅ−Ｗ合金、金属Ｎｉおよび電
解鉄を用意し、これら原料を高周波誘導炉にてそれぞれ
表１〜４に示される成分組成をもったＦｅ基合金溶湯を
調製し、この溶湯を水アトマイズ法により粉末化し、分
級して４０μｍ以下の粒径を有する粉末とし、ついでこ
れをアトライタで偏平化した後、Ａｒ雰囲気中、４００
℃で２時間保持の熱処理を施し、さらに分級を行なって
同じく表１〜４に示される粒度に調整することにより本
発明偏平状Ｆｅ基合金粉末（以下、本発明粉末という）
１〜３０、合金成分としてこの発明の範囲から外れて含
有する比較偏平状Ｆｅ基合金粉末（以下、比較粉末とい
う）１〜６および従来偏平状Ｆｅ基合金粉末（以下、従
来粉末という）１〜２をそれぞれ製造した。Next, the flat Fe-based alloy powder of the present invention will be specifically described with reference to examples. As raw materials, Fe-Si alloy, Fe-Al alloy, Fe-V alloy,
An Fe-Mo alloy, an Fe-W alloy, metal Ni, and electrolytic iron are prepared, and a Fe-based alloy melt having the component compositions shown in Tables 1 to 4 is prepared from these raw materials in a high-frequency induction furnace. Was pulverized by a water atomizing method and classified to obtain a powder having a particle size of 40 μm or less. Then, the powder was flattened by an attritor, and then 400 μm in an Ar atmosphere.
A flat Fe-based alloy powder of the present invention (hereinafter, referred to as the present invention powder) by subjecting it to a heat treatment of holding at 2 ° C. for 2 hours, followed by classification and adjustment to the particle sizes shown in Tables 1 to 4 as well.
1 to 30, comparative flat Fe-based alloy powders (hereinafter referred to as comparative powders) 1 to 6 and conventional flat Fe-based alloy powders (hereinafter referred to as conventional powders) 1 to 6 contained as alloy components outside the scope of the present invention. 2 were each manufactured.
【００１３】[0013]
【表１】 [Table 1]
【００１４】[0014]
【表２】 [Table 2]
【００１５】[0015]
【表３】 [Table 3]
【００１６】[0016]
【表４】 [Table 4]
【００１７】得られた本発明粉末１〜３０、比較粉末１
〜６および従来粉末１〜２の保磁力と飽和磁化を測定
し、この結果を表５〜６に示し、さらに、本発明粉末１
〜３０、比較粉末１〜６および従来粉末１〜２を８０
℃、９５％相対湿度の雰囲気に１００時間暴露し、発錆
の有無および１００時間暴露前後の飽和磁化の減少率を
測定し、その結果を表５〜６に示した。The obtained powders 1 to 30 of the present invention and comparative powder 1
6 and the conventional powders 1-2, the coercive force and the saturation magnetization were measured, and the results are shown in Tables 5-6.
-30, comparative powders 1-6 and conventional powders 1-2 are 80
Exposure to an atmosphere at a temperature of 95 ° C. and a relative humidity of 100% for 100 hours, the presence or absence of rusting and the reduction rate of the saturation magnetization before and after the exposure for 100 hours were measured. The results are shown in Tables 5 to 6.
【００１８】[0018]
【表５】 [Table 5]
【００１９】[0019]
【表６】 [Table 6]
【００２０】[0020]
【発明の効果】表１〜６に示される結果から、本発明粉
末１〜３０は、従来粉末１〜２に比して、保磁力が低
く、一段と高い飽和磁化を示し、さらに高温高湿雰囲気
に暴露しても発錆がなく、さらに暴露前後の飽和磁化の
減少率が少ないことが明らかである。また、この発明の
範囲から外れた成分組成を有する比較粉末１〜６は、保
磁力、飽和磁化および耐食性の内の少なくとも１つに好
ましくない特性が現れることが分かる。From the results shown in Tables 1 to 6, the powders 1 to 30 of the present invention have a lower coercive force, a higher saturation magnetization than conventional powders 1 and 2, and a high temperature and high humidity atmosphere. It is clear that there is no rust even when exposed to, and the rate of decrease in saturation magnetization before and after exposure is small. In addition, it can be seen that Comparative Powders 1 to 6 having a component composition outside the range of the present invention exhibit unfavorable characteristics in at least one of coercive force, saturation magnetization, and corrosion resistance.
【００２１】上述のように、この発明の偏平状Ｆｅ基合
金粉末は、保磁力が低く、高い飽和磁化を示し、さらに
腐食することがなく、腐食による飽和磁化の減少率が少
ないところから、これを磁気シールド用に用いた場合、
すぐれた磁気シールド用性能を発揮するものであり、磁
気シールド用性能の一層の向上に寄与するばかりでな
く、磁気シールド用層や磁気シールド用シートなどの薄
肉化を可能にするなどの工業上有用な特性を有するので
ある。As described above, the flat Fe-based alloy powder of the present invention has a low coercive force, exhibits high saturation magnetization, does not corrode, and has a small reduction rate of saturation magnetization due to corrosion. When used for magnetic shielding,
Exhibits excellent magnetic shielding performance and contributes not only to further improvement of magnetic shielding performance, but also to industrial usefulness such as thinning of magnetic shielding layers and magnetic shielding sheets. It has various characteristics.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 飛田 修司 秋田県秋田市茨島５−14−３ 三菱マテリ アルクォーツ株式会社内 (72)発明者 森本 耕一郎 埼玉県大宮市北袋町１−297 三菱マテリ アル株式会社総合研究所内 (72)発明者 石黒 銀矢 東京都新宿区西新宿三丁目19番２号 日本 電信電話株式会社内 (72)発明者 平野 広幸 東京都新宿区市谷加賀町一丁目１番１号 大日本印刷株式会社内 (72)発明者 泉谷 和美 東京都新宿区市谷加賀町一丁目１番１号 大日本印刷株式会社内 Ｆターム(参考） 4K018 BA16 BB01 BB04 BC01 BD01 5E041 AA11 AA19 CA06 HB17 NN01 NN06 NN17 5E321 BB53 GG07 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shuji Tobita 5-14-3 Ibarjima, Akita City, Akita Prefecture Inside Mitsubishi Materia Al Quartz Co., Ltd. (72) Inventor Koichiro Morimoto 1-297 Kitabukurocho, Omiya City, Saitama Prefecture Mitsubishi Materia Al Inside the Research Institute, Inc. No. Within Dai Nippon Printing Co., Ltd. (72) Inventor Kazumi Izumaya 1-1-1, Ichigaya Kagacho, Shinjuku-ku, Tokyo F-term within Dai Nippon Printing Co., Ltd. 4K018 BA16 BB01 BB04 BC01 BD01 5E041 AA11 AA19 CA06 HB17 NN01 NN06 NN17 5E321 BB53 GG07
Claims (6)
０％、 Ｖ：０．５〜５％、 を含有し、残りがＦｅと不可避不純物からなる組成を有
することを特徴とする磁気シールド用偏平状Ｆｅ基合金
粉末。1. The method according to claim 1, wherein one or two of Si and Al are contained in 15 to 3 atomic%.
A flat Fe-based alloy powder for a magnetic shield, comprising 0%, V: 0.5 to 5%, and the balance being Fe and inevitable impurities.
０％、 Ｍｏ：０．５〜５％、 を含有し、残りがＦｅと不可避不純物からなる組成を有
することを特徴とする磁気シールド用偏平状Ｆｅ基合金
粉末。2. The method according to claim 1, wherein one or two of Si and Al are contained in 15 to 3 atomic%.
A flat Fe-based alloy powder for a magnetic shield, comprising: 0%, Mo: 0.5 to 5%, and the balance being Fe and inevitable impurities.
０％、 Ｗ：０．５〜５％、 を含有し、残りがＦｅと不可避不純物からなる組成を有
することを特徴とする磁気シールド用偏平状Ｆｅ基合金
粉末。3. The method according to claim 1, wherein one or two of Si and Al are contained in a total of 15 to 3 atomic%.
A flat Fe-based alloy powder for a magnetic shield, comprising: 0%, W: 0.5 to 5%, and a balance of Fe and unavoidable impurities.
０％、 Ｖ、ＭｏおよびＷの内の２種以上を合計で０．５〜５
％、 を含有し、残りがＦｅと不可避不純物からなる組成を有
することを特徴とする磁気シールド用偏平状Ｆｅ基合金
粉末。4. The method according to claim 1, wherein one or two of Si and Al are contained in a total of 15 to 3 atomic%.
0%, two or more of V, Mo and W in total of 0.5 to 5
%, And the balance being Fe and inevitable impurities, wherein the flat Fe-based alloy powder for a magnetic shield is characterized in that:
ールド用偏平状Ｆｅ基合金粉末に、さらに、 Ｎｉ：０．２〜１０％、 を含有する組成を有することを特徴とする磁気シールド
用偏平状Ｆｅ基合金粉末。5. The magnetic material according to claim 1, wherein the flat Fe-based alloy powder for magnetic shield according to claim 1, further comprises: Ni: 0.2 to 10%. Flat Fe-based alloy powder for shielding.
量を累計して５０％になったときの粒径Ｄ50：３〜６０
μｍ、 アスペクト比（Ｄ50／ｄ）：２０〜５００、 に調整された粒度を有することを特徴とする請求項１、
２、３、４または５記載の磁気シールド用偏平状Ｆｅ基
合金粉末。6. An average thickness d: 0.02 to 0.6 μm, and a particle size D 50 : 3 when the total weight becomes 50% from the smaller particle size determined by a particle size distribution analyzer. ~ 60
The particle size is adjusted to: μm, aspect ratio (D 50 / d): 20 to 500 .
6. The flat Fe-based alloy powder for a magnetic shield according to 2, 3, 4 or 5.
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|---|---|---|---|
| JP10263189A JP2000087192A (en) | 1998-09-17 | 1998-09-17 | FLAT Fe-BASE ALLOY POWDER FOR MAGNETIC SHIELDING |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10263189A JP2000087192A (en) | 1998-09-17 | 1998-09-17 | FLAT Fe-BASE ALLOY POWDER FOR MAGNETIC SHIELDING |
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|---|---|
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Family
ID=17386016
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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| Country | Link |
|---|---|
| JP (1) | JP2000087192A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018143472A1 (en) * | 2017-02-06 | 2018-08-09 | 山陽特殊製鋼株式会社 | Soft magnetic flat powder |
| CN117512474A (en) * | 2023-10-24 | 2024-02-06 | 四川大学 | Fe-based shielding alloy for structure/function integrated nuclear radiation protection and preparation method thereof |
-
1998
- 1998-09-17 JP JP10263189A patent/JP2000087192A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018143472A1 (en) * | 2017-02-06 | 2018-08-09 | 山陽特殊製鋼株式会社 | Soft magnetic flat powder |
| JP2018127647A (en) * | 2017-02-06 | 2018-08-16 | 山陽特殊製鋼株式会社 | Soft magnetism flat powder |
| CN110234449A (en) * | 2017-02-06 | 2019-09-13 | 山阳特殊制钢株式会社 | The flat powder of soft magnetism |
| KR20190116267A (en) * | 2017-02-06 | 2019-10-14 | 산요오도꾸슈세이꼬 가부시키가이샤 | Soft magnetic flat powder |
| KR102393236B1 (en) * | 2017-02-06 | 2022-04-29 | 산요오도꾸슈세이꼬 가부시키가이샤 | soft magnetic flat powder |
| CN117512474A (en) * | 2023-10-24 | 2024-02-06 | 四川大学 | Fe-based shielding alloy for structure/function integrated nuclear radiation protection and preparation method thereof |
| CN117512474B (en) * | 2023-10-24 | 2024-05-07 | 四川大学 | Fe-based shielding alloy for structure/function integrated nuclear radiation protection and preparation method thereof |
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