JPS63117406A - Amorphous alloy dust core - Google Patents
Amorphous alloy dust coreInfo
- Publication number
- JPS63117406A JPS63117406A JP61264268A JP26426886A JPS63117406A JP S63117406 A JPS63117406 A JP S63117406A JP 61264268 A JP61264268 A JP 61264268A JP 26426886 A JP26426886 A JP 26426886A JP S63117406 A JPS63117406 A JP S63117406A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- amorphous alloy
- alloy
- heat treatment
- molded
- 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.)
- Granted
Links
- 229910000808 amorphous metal alloy Inorganic materials 0.000 title claims abstract description 32
- 239000000428 dust Substances 0.000 title abstract description 4
- 239000000843 powder Substances 0.000 claims abstract description 69
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 21
- 239000000956 alloy Substances 0.000 abstract description 21
- 238000000465 moulding Methods 0.000 abstract description 11
- 238000010438 heat treatment Methods 0.000 abstract description 8
- 230000015556 catabolic process Effects 0.000 abstract description 6
- 238000002425 crystallisation Methods 0.000 abstract description 4
- 230000008025 crystallization Effects 0.000 abstract description 4
- 239000011810 insulating material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 230000035699 permeability Effects 0.000 description 10
- 238000009692 water atomization Methods 0.000 description 8
- 238000005056 compaction Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 229910000889 permalloy Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 238000005280 amorphization Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009689 gas atomisation Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、アモルファス合金圧粉磁心、特に電子機器内
のノイズフィルター、チョークコイル等の磁心に使用さ
れるアモルファス合金圧粉磁心に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an amorphous alloy powder magnetic core, particularly an amorphous alloy powder magnetic core used as a magnetic core for noise filters, choke coils, etc. in electronic devices. .
従来より電子機器の電源内のノイズフィルター。 Traditionally used as a noise filter in the power supply of electronic equipment.
チョークコイル等の磁心には、フェライト、Ｍ。Ferrite, M is used for the magnetic core of choke coils, etc.
パーマロイ圧粉磁心、Ｆｅ−５Ｌ−Ａ１合金圧粉磁心な
どが使用されている。特に、近年電源がスイッチング電
源化され、さらにその駆動周波数の上昇と電流容量の増
加の傾向が強まっており、良好な周波数特性を有すると
ともに、大電流によって飽和しにくい高磁束密度の合金
圧粉磁心が注目を浴びつつある。Permalloy powder magnetic cores, Fe-5L-A1 alloy powder magnetic cores, etc. are used. In particular, in recent years, power supplies have become switching power supplies, and there has been a growing trend toward higher drive frequencies and increased current capacities.Alloy powder magnetic cores have good frequency characteristics and high magnetic flux density, which is difficult to saturate with large currents. is attracting attention.
一方、結晶磁気異方性をもたないアモルファス合金は、
高透磁率、低保磁力等の優れた軟磁性をもちながら、通
常の結晶質磁性合金の２〜３倍も高い固有抵抗の故に高
周波損失が少なく、特にＦｅ基アモルファス合金は磁束
密度が高いのでノイズフィルター、チョークコイル等の
磁心には最適の素材ということができる。□
アモルファス合金をノイズフィルター、チョークコイル
等の磁心に用いた例は、たとえば東芝レビュー３９巻８
号、 １９８４ Ｐ７３５などに見られる。これらは単
ロール法と呼ばれる溶湯急冷法によって製造された厚さ
数１０μｍのアモルファス合金薄帯を素材として、これ
をトロイダル状に巻き回した巻鉄心として用いられてい
る。On the other hand, amorphous alloys that do not have magnetocrystalline anisotropy
Although it has excellent soft magnetic properties such as high permeability and low coercive force, it has a resistivity that is 2 to 3 times higher than ordinary crystalline magnetic alloys, so it has low high frequency loss, and Fe-based amorphous alloys have particularly high magnetic flux density. It can be said to be the best material for magnetic cores in noise filters, choke coils, etc. □ Examples of using amorphous alloys in the magnetic cores of noise filters, choke coils, etc. are given in Toshiba Review Vol. 39, 8.
No., 1984 P735, etc. These are made of an amorphous alloy ribbon several tens of micrometers thick produced by a molten metal quenching method called the single roll method, and are used as a wound core made by winding this into a toroidal shape.
しかしながら、巻磁心は巻き回し、含浸硬化、ギャップ
の加工等加工工数が大きく、勢い高価格となるという問
題があった。また、巻線工数を低減する意味では、Ｅ形
、Ｕ形等の異形コアの採用が有利であるが、アモルファ
ス合金薄帯から製造するには、アモルファス合金が高硬
度なため打抜きに使用する金型の寿命が短いという困難
があるため実用には至っていない。However, the wound magnetic core requires a large number of man-hours for winding, impregnation hardening, gap machining, etc., and has the problem of being extremely expensive. In addition, in terms of reducing the number of winding steps, it is advantageous to use irregularly shaped cores such as E-shape and U-shape. It has not been put into practical use due to the difficulty of the short life of the mold.
上記のアモルファス合金薄帯よりなる磁心の欠点を解消
するため、アモルファス合金の粉末を製造し、これを圧
粉成形する方法も試行されている。In order to eliminate the drawbacks of the magnetic core made of the amorphous alloy ribbon described above, a method of producing amorphous alloy powder and compacting it has also been tried.
しかしながら、有機物あるいは無機物を絶縁層かつバイ
ンダーとして用いた場合、アモルファス合金は硬くて圧
縮性に乏しいため、これら絶縁物質の量を大量に加えな
いと成形できず、成形できても絶縁物の量が多いために
透磁率が小さくなってしまうという問題があった。一方
、量産性に優れろ水アトマイズ法による不規則形状のア
モルファス合金粉末は、比較的圧縮性に富み１．バイン
ダー兼＃！Ｉ縁物質を加えずども成形は可能であるが。However, when organic or inorganic substances are used as the insulating layer and binder, the amorphous alloy is hard and has poor compressibility, so it cannot be formed unless a large amount of these insulating substances is added, and even if it can be formed, the amount of insulator is There was a problem in that the magnetic permeability decreased because there was a large amount. On the other hand, irregularly shaped amorphous alloy powder produced by the filtered water atomization method, which is easy to mass produce, has relatively good compressibility. Binder cum #! Although molding is possible without adding an I-edge material.
Ｆｅ、。Ｐｉ４Ｃ６等多くのアモルファス合金において
は、圧粉の際に粉末粒子相互が接触する頻度が高く、絶
縁が破壊される傾向が強いため、透磁率の周波数特性が
劣化するという問題があった。Fe,. Many amorphous alloys such as Pi4C6 have a problem in that the frequency characteristics of magnetic permeability deteriorate because the powder particles frequently come into contact with each other during compaction, and there is a strong tendency for insulation to break down.
本発明の目的は、圧粉、成形が容易で、圧粉の際に絶縁
破壊しにくく、かつ安価なアモルファス合金粉末から製
造されるアモルファス合金粉末圧粉磁心を提供すること
にある。An object of the present invention is to provide an amorphous alloy powder dust core manufactured from an inexpensive amorphous alloy powder that is easy to compact and mold, is difficult to cause dielectric breakdown during compaction, and is inexpensive.
本発明者は、上記のアモルファス合金に関する問題点を
解決するために検討を重ねた結果、 Ｆｅ、Ｃｒ、Ｐお
よびＣまたはＢの１種または２種よりなり、原子百分率
で表わした式、
Ｆ ｅ１００−ａ−ｂ−ｃ ＠ Ｃｒａ−Ｐ ｂ （Ｃ
ｅ Ｂ ）ｃ（１≦ａ≦８，５≦ｂ、１５≦ｂ＋ｃ≦３
０）で示される組成を有するアモルファス合金粉末を原
料粉末として用い、これを圧粉成形し、然る後結晶化温
度以下で熱処理することで圧粉成形が容易で優れた磁気
特性を有する圧粉磁心が製造できることを見い出し、本
発明をなすに至った。As a result of repeated studies in order to solve the problems regarding the amorphous alloy described above, the present inventor has found that the following formula is obtained: -a-b-c @Cra-P b (C
e B ) c (1≦a≦8, 5≦b, 15≦b+c≦3
By using an amorphous alloy powder having the composition shown in 0) as a raw material powder, compacting it, and then heat-treating it below the crystallization temperature, a compacted powder that is easy to compact and has excellent magnetic properties. It was discovered that a magnetic core can be manufactured, and the present invention was accomplished.
以下、本発明について詳述する。The present invention will be explained in detail below.
本発明者は、上記アモルファス合金に関する問題点を解
決すべく、組成面から種々検討を行なった。The present inventor conducted various studies from the viewpoint of composition in order to solve the problems regarding the above-mentioned amorphous alloy.
成形性、圧縮性が最も良好な粒子形態である不規則形状
のアモルファス合金粉末の成形体は、後述するようにバ
インダーを用いなくとも成形可能であるが、多くのアモ
ルファス合金では、圧粉の際、粉末粒子相互が接触する
頻度が高く、透磁率の周波数特性が乏しく、実用には耐
えない。例えば、Ｆｅ、、Ｐ、、ＣＧアモルファス合金
の見掛密度３．０ｇ／ａｎ？の粉末を２０ｔｏｎ／ａｌ
でリング状にプレス成形し、Ａｒ雰囲気下４００”Ｃに
て２Ｈｒ保持した場合の１０ＫＩＩＺにおける透磁率は
２３０であるが、透磁率が半減する周波数（以下限界周
波数と呼称する）は０．３ＭＨ２であり、Ｆｅ−３ｉ−
Ａ１合金圧粉磁心やＭｏパーマロイ圧粉磁心のＩＯＭＩ
（Ｚ以上より大幅に劣る。Irregularly shaped amorphous alloy powder compacts, which have the best particle shape for formability and compressibility, can be formed without the use of a binder, as described below, but many amorphous alloys are difficult to form during compaction. , powder particles often come into contact with each other, and the frequency characteristics of magnetic permeability are poor, making it unsuitable for practical use. For example, the apparent density of Fe, P, CG amorphous alloy is 3.0 g/an? 20 tons/al of powder
The magnetic permeability at 10KIIZ when press-formed into a ring shape and held at 400"C for 2 hours in an Ar atmosphere is 230, but the frequency at which the magnetic permeability is halved (hereinafter referred to as the limit frequency) is 0.3MH2. Yes, Fe-3i-
IOMI of A1 alloy powder magnetic core and Mo permalloy powder magnetic core
(Significantly inferior to Z or higher.
本発明者らは、種々検討の結果、アモルファス形成元素
としてＰ、および（Ｃ，Ｂ）を含むＦｅ基アモルファス
合金にＣｒを含む合金（特開昭５０−１０１２１５号）
が、それ自体強固な絶縁性皮膜を有し、圧粉成形時に絶
縁破壊しに＜＜、良好な周波数特性を有することを見い
出した。As a result of various studies, the present inventors discovered an alloy containing Cr in a Fe-based amorphous alloy containing P and (C, B) as amorphous forming elements (Japanese Patent Application Laid-open No. 101215/1983).
However, it was found that the material itself has a strong insulating film, does not cause dielectric breakdown during powder compaction, and has good frequency characteristics.
すなわち、Ｆａ、Ｃ，ＰおよびＣまたはＢの１種または
２種よりなり、原子百分率で表わした式、Ｆ ｅｌｏｔ
ｌ−ａ−ｂ−Ｃ＠ Ｃｒａ−Ｐ ｂ（Ｃｇ Ｂ ）ｃ（
１≦ａ≦８，５≦ｂ、１５≦ｂ十ｃ≦３０）で示される
組成を有する合金が強固な絶縁性皮膜を有し、圧粉成形
時に絶縁破壊しにくいことを見い出した。以下１組成限
定の理由を述べる。That is, it is composed of one or two of Fa, C, P, and C or B, and has the formula expressed in atomic percentage, F elot
l-a-b-C@Cra-P b(Cg B )c(
It has been found that an alloy having a composition represented by the formulas 1≦a≦8, 5≦b, 15≦b and c≦30) has a strong insulating film and is difficult to cause dielectric breakdown during compaction. The reason for limiting the composition to one will be described below.
ＣｒとＰは共存することによって強固な絶縁性皮膜を生
成する効果を有する。この効果を発現させるための必要
最小限のＣｒとＰの量は、Ｃｒ１％。When Cr and P coexist, they have the effect of forming a strong insulating film. The minimum amount of Cr and P required to produce this effect is 1% Cr.
２５％である。一方、Ｃｒの添加はＦｅ−Ｐ−（Ｃ，Ｂ
）アモルファス合金の磁歪を低減し、透磁率を高める効
果をもつ、ただし、飽和磁束密度Ｂｓは、添態量が多い
ほど低下する。８％以上添加すると素材粉末のＢｓが１
００ＯＯＧを下回るので好ましくない。It is 25%. On the other hand, the addition of Cr is Fe-P-(C,B
) It has the effect of reducing the magnetostriction and increasing the magnetic permeability of the amorphous alloy. However, the saturation magnetic flux density Bs decreases as the additive amount increases. If 8% or more is added, the Bs of the material powder will be 1
Since it is less than 00OOG, it is not preferable.
Ｐおよび（Ｃ，Ｂ）はアモルファス形成に必要な元素で
あって合計１５％以上３０％以下であり、これより低い
か高くてもアモルファス形成能が困難となる。ＢはＰと
の組み合わせ上、Ｃと同等以上にアモルファス化を促進
させるが、比較的高価な元素であるので添加量を少なく
するか、全く無添加であっても圧粉磁心としての特性を
引き出す上での支障はない。P and (C, B) are elements necessary for amorphous formation, and their total content is 15% or more and 30% or less, and if the content is lower or higher than this, it becomes difficult to form an amorphous layer. B, in combination with P, promotes amorphization to the same or higher degree than C, but since it is a relatively expensive element, the amount added should be reduced, or even if no additive is added at all, the properties of the powder magnetic core can be brought out. There are no problems above.
このようなＦａ−Ｃｒ−Ｐ−（Ｃ，Ｂ）合金に添加元素
として、Ｔｉ、 Ｚｒ、 Ｈｆｅ Ｖ、 Ｎｂ、 Ｔａ
、 Ｍｏ。Additive elements to such Fa-Cr-P-(C,B) alloy include Ti, Zr, Hfe, V, Nb, and Ta.
, Mo.
Ｗ、Ｍｎ、Ｇｏ、Ｎｉ、Ｃｕ、ＳＬ、Ｇｅ、Ｂｉ、Ｂｅ
。W, Mn, Go, Ni, Cu, SL, Ge, Bi, Be
.
Ｍｇ、Ｙ、Ｌａのうち１種類以上を加えることも有効で
ある。このうちＴｉよりＭｇまでの元素は磁歪を低減し
、透磁率を高めるのに効果がある６また、Ｔｉ、Ｚｒ、
Ｈｆ、Ｖ、Ｎｂ、Ｔａ、Ｍｏ、Ｗ、Ｎｉ。It is also effective to add one or more of Mg, Y, and La. Among these elements, elements from Ti to Mg are effective in reducing magnetostriction and increasing magnetic permeability6.Also, Ti, Zr,
Hf, V, Nb, Ta, Mo, W, Ni.
Ｓｉ、Ｇｅ、Ｂｉ、Ｙ、Ｌａは、アモルファス形成能を
高める。しかしながら、これらの元素は、添加量の増加
とともに磁束密度を下げるので、素材粉末のＢｓを１０
０ＯＯＧ以上とするには、添加量の上限があり、８以下
とする必要がある。Si, Ge, Bi, Y, and La enhance the amorphous formation ability. However, these elements lower the magnetic flux density as the amount added increases, so if the Bs of the material powder is reduced to 10
In order to make it 0OOG or more, there is an upper limit to the amount added, and it needs to be 8 or less.
このような組成範囲のアモルファス合金粉末は、それ自
体が強固な絶縁性皮膜を有するために、そのまま成形し
ても周波数特性が高いが、少量の絶縁性物質を混合した
後、成形するかもしくは粉末表面に絶縁性皮膜を被覆す
ることによってさらに周波数特性が改良され、限界周波
数が高まる。絶縁物質は、成形後の熱処理が不可避なの
で熱処理温度に耐える耐熱性を持つことが望ましい。Amorphous alloy powder in this composition range has a strong insulating film, so it has high frequency characteristics even if it is molded as it is, but it must be molded after mixing a small amount of insulating material or powder By coating the surface with an insulating film, the frequency characteristics are further improved and the limit frequency is increased. Since heat treatment is unavoidable after molding, the insulating material preferably has heat resistance that can withstand the heat treatment temperature.
熱処理は、アモルファス合金の結晶化温度以下で粉末製
造時および成形時に生じた応力を除去し。Heat treatment is performed below the crystallization temperature of the amorphous alloy to remove stress generated during powder manufacturing and molding.
軟磁性を向上させるために施される。通常キュリー点以
上の無磁場処理がなされるが、磁場中熱処理を行なうと
さらに特性の向上が図られる場合がある。Applied to improve soft magnetism. Normally, non-magnetic field treatment above the Curie point is performed, but properties may be further improved by heat treatment in a magnetic field.
なお１本発明アモルファス合金圧粉磁心を製造するにあ
たっては１以上の組成を有する合金粉末であって見掛密
度３．５ ｇ ／ａｄ以下の不規則形状の粉末を用いる
のが良い、以下その理由を説明する。1. In manufacturing the amorphous alloy powder magnetic core of the present invention, it is preferable to use an alloy powder having one or more compositions and an irregularly shaped powder with an apparent density of 3.5 g/ad or less.The reason is as follows. Explain.
アモルファス合金は、たとえばＦｅ−Ｐ−Ｃ系で、
はビッカース硬ざ７００以上と高い硬さを有し、かつ塑
性変形しにくいのでガスアトマイズ粉末のような球状粉
末では成形が困難であり、またフレーク状では粉末粒子
相互の絡み合いが少なく、密度を高めるのが困難である
。成形性、圧縮性が最も良好な粒子形態は特公昭５４−
７６４６９号で開示された水アトマイズ法による不規則
形状の粉末である。The amorphous alloy is, for example, Fe-P-C based,
has a high hardness of more than 700 on the Vickers hardness scale, and is difficult to deform plastically, making it difficult to mold with spherical powders such as gas atomized powders.In addition, in flake form, there is less entanglement of powder particles with each other, making it difficult to increase density. is difficult. The particle form with the best moldability and compressibility is
It is an irregularly shaped powder produced by the water atomization method disclosed in No. 76469.
本発明者の検討では不規則度が高くなるにつれて、成形
体の強度が高くなり、成形性は向上する。According to studies conducted by the present inventors, as the degree of irregularity increases, the strength of the molded article increases and the moldability improves.
第１図にＦｅ７．Ｃｒ、Ｐ１４ＣＧアモルファス合金の
平均粒度が約６０μｍでほぼ等しく見掛密度の異なる不
規則形状粉末に成形潤滑剤としてステアリン酸亜鉛を０
．５重量％添加して超硬合金製金型を用い、２０ｔｏｎ
／ ｃｘｌの高圧力でプレス成形して長さ３０ｍｎ＋。Fig. 1 shows Fe7. Zinc stearate was added as a molding lubricant to irregularly shaped powder of Cr, P14CG amorphous alloy with an average particle size of approximately 60 μm and approximately equal apparent densities.
．． Add 5% by weight and use a cemented carbide mold to produce 20 tons.
/ CXL high pressure press molding to length 30mm+.
幅５Ｉｍ、高さ５ｍの成形体を作成し、その抗折力を測
定した結果を示す。見掛密度が３．５ｇ／ｃｉ以下であ
れば、成形体として通常必要とされる抗折力が０ 、５
ｋｇ ｆ ／ ｍｍ ”以上となることが明らかであ
る。したがって、見掛密度は３．５ ｇ ／（！！？以
下が望ましい。なお、見掛密度は平均粒度によっても変
動するが、適正な水アトマイズ法によってほぼ一５０ｍ
ｅｓｈでアモルファス化が可能であり、上記の３．５
ｇ ／ａｄもこの範囲での値で考える。見掛密度が３．
５ ｇ ／ａ１以下のアモルファス合金粉末は、上記の
ように水アトマイズ法により製造するのが最も好ましい
が、水アトマイズままで見掛密度が低く、したがって流
動性が低い場合は、振動ミル、アトリッター等による機
械的粉砕によって不規則を低減し、見掛密度を増加させ
ることも可能である。A molded body having a width of 5 Im and a height of 5 m was prepared, and the transverse rupture strength thereof was measured.The results are shown below. If the apparent density is 3.5 g/ci or less, the transverse rupture strength normally required as a molded product is 0.5 g/ci.
It is clear that the apparent density is 3.5 g/(!!?) or more.Although the apparent density varies depending on the average particle size, Approximately 150m by atomization method
Amorphousization is possible with esh, and 3.5 above
g/ad is also considered as a value within this range. The apparent density is 3.
It is most preferable to produce amorphous alloy powder of 5 g/a1 or less by the water atomization method as described above, but if it is water atomized and has a low apparent density and therefore low fluidity, it may be produced using a vibrating mill or an attritor. It is also possible to reduce irregularities and increase the apparent density by mechanical comminution, such as by mechanical grinding.
以上のように特定された組成（見掛密度）を有するアモ
ルファス合金粉末は、圧縮性、成形性に優れているとと
もに高い透磁率を有し、かつ圧粉の際に絶縁破壊しに＜
＜、これを用いて製造された圧粉磁心は優れた性質を有
する。また、原料として高価なりの添加を抑制するビと
が可能であること、最も量産的な粉末製造手法である水
アトマイズ法の利用にふされしい粉末であることから極
めて安価に製造することができる。The amorphous alloy powder having the composition (apparent density) specified above has excellent compressibility and formability, high magnetic permeability, and is resistant to dielectric breakdown during compaction.
<The powder magnetic core manufactured using this has excellent properties. In addition, it is possible to suppress the addition of expensive raw materials, and the powder is suitable for use in the water atomization method, which is the most mass-produced powder manufacturing method, so it can be manufactured at an extremely low cost. .
なお、本発明に用いられる組成のアモルファス合金粉末
は、水アトマイズ後の乾燥工程中の酸化が少なく、取扱
い性に優れており、この面からも生産的なものである。The amorphous alloy powder having the composition used in the present invention is less likely to be oxidized during the drying process after water atomization, and is easy to handle, making it productive from this point of view as well.
以下、本発明の具体的内容を実施例により詳述する。 Hereinafter, the specific content of the present invention will be explained in detail with reference to Examples.
実施例１
水アトマイズ法により、各種のアモルファス合金粉末を
製造し、−５０ｍｅｓｈで篩下した。見掛密度は、いず
れも１．５〜３．０ ｇ ／ｄであった。粉末に成形潤
滑剤としてステアリン酸亜鉛を０．５重量％添加し、外
径２０ｍφ、内径１０ｎｍφ、高さ５ｍのリング状にプ
レス成形した。成形圧力は２０ｔｏｎ／ ａｌで行なっ
た。Example 1 Various amorphous alloy powders were produced by a water atomization method and sieved through -50 mesh. The apparent density was 1.5 to 3.0 g/d in all cases. 0.5% by weight of zinc stearate was added to the powder as a molding lubricant, and the powder was press-molded into a ring shape with an outer diameter of 20 mφ, an inner diameter of 10 nmφ, and a height of 5 m. The molding pressure was 20 tons/al.
成形密度は真密度の約８０％であった。The compacted density was approximately 80% of the true density.
この成形体をキュリー点以上結晶化温度以下の各組成の
最適条件で加熱後水中へ急冷し測定に供した。結果を第
１表に示す。This molded body was heated under the optimum conditions for each composition above the Curie point and below the crystallization temperature, and then rapidly cooled in water and subjected to measurements. The results are shown in Table 1.
本発明合金は、ｌ０ＫＨ２における実効透磁率μｅが概
略２００以上と高く、しかも限界周波数が高くなってお
り、周波数特性が優れているばかりでなく、従来のセン
ダスト圧粉磁心やＭＯパーマロイ圧粉磁心を上回るＢｓ
を有している。比較例として示した類似組成の粉末より
なる圧粉磁心は、μｅが高いと限界周波数が低く、一部
の合金は結晶質が混在しているためにμｅが極めて低く
、実用できないレベルである。The alloy of the present invention has a high effective magnetic permeability μe at 10KH2 of approximately 200 or more, and has a high limit frequency, and not only has excellent frequency characteristics, but also has superior characteristics to conventional sendust powder magnetic cores and MO permalloy powder magnetic cores. Bs exceeding
have. A powder magnetic core made of powder with a similar composition shown as a comparative example has a low limit frequency when μe is high, and some alloys have extremely low μe due to the presence of crystalline substances, which is at a level that is not practical.
実施例２
実施例１のＮｏ、１合金、Ｎ００８合金を水アトマイズ
法により製造し、−５０ｍｅｓｈで篩下した。見掛密度
は１．５〜１．９ ｇ ／ａｄであった。この粉末にケ
イ酸ソーダを０．６重量％添加し、粉末表面を被覆した
後、成形潤滑剤としてステアリン酸亜鉛０．５重量％を
添加し、外径２０ｎａφ、内径１０１ｍφ、高さ５ｎｗ
＋のリング状にプレス成形した。成形圧力は、２０ｔｏ
ｎ／ｃｉで行なった。成形密度は真密度の約７７〜７９
％であった。この成形体を４００℃で１２０分熱処理し
た結果、Ｎｏ、１合金の圧粉磁心のｌ０ＫＨ２でのμｅ
は２００、限界周波数は２８ＭＨ２であり、Ｎ ｏ 、
８合金の圧粉磁心の１ＯＫＨ２でのμｅは２４０、限
界周波数は２０ＭＨ２となり、実施例１の場合より周波
数特性が向上した。Example 2 The No. 1 alloy and the N008 alloy of Example 1 were produced by a water atomization method and sieved through -50 mesh. The apparent density was 1.5-1.9 g/ad. After adding 0.6% by weight of sodium silicate to this powder and coating the powder surface, 0.5% by weight of zinc stearate was added as a molding lubricant, outer diameter 20 naφ, inner diameter 101 mφ, height 5nw.
Press molded into a + ring shape. Molding pressure is 20to
Performed at n/ci. The molded density is about 77-79 of the true density.
%Met. As a result of heat-treating this compact at 400°C for 120 minutes, the μe of powder magnetic core of No. 1 alloy at l0KH2
is 200, the limit frequency is 28MH2, and N o ,
The powder magnetic core of 8 alloy had a μe of 240 and a limit frequency of 20 MH2 at 1OKH2, and the frequency characteristics were improved compared to the case of Example 1.
実施例３
実施例１のＮ００１合金を■水アトマイズ法、■ガスア
トマイズ直後水冷する方法（Ｓ、Ａ、Ｍｉｌｌｅｒ。Example 3 The N001 alloy of Example 1 was prepared by (1) water atomization method, (2) water cooling method immediately after gas atomization (S, A, Miller).
Ｒ，Ｊ、Ｍｕｒｐｈｙ：５ｃｒｉｐｔａ Ｍｅｔａｌｌ
ｕｒｇｉｃａ、Ｖｏｌ、１３．Ｐ、６７３゜１９７９）
、■単ロール法でリボンを作製後粉砕する方法（特開昭
５８−１９７２０５号）の３通りの方法で製造した。い
ずれも−２００ｍｅｓｈに篩下した。見掛密度および粉
末形状は、それぞれ■１．９ ｇ ／ａｄ−不規則形状
、■５．０ ｇ ／ｃｄ−球状、■２．０ ｇ ／ｃｘ
ｌ−フレーク状であった。いずれの粉末もステアリン酸
亜鉛０．５重量％を添加し、実施例１と同様にリング形
状にプレス成形を試みたが、■の球状粉末は成形体が取
扱い不能なほど強度がなく評価不能であった。R, J, Murphy: 5cripta Metal
Urgica, Vol. 13. P, 673°1979)
It was manufactured using three methods: (1) a method in which a ribbon is prepared by a single roll method and then crushed (Japanese Patent Application Laid-Open No. 197205/1983). All were sieved through -200 mesh. The apparent density and powder shape are: ■1.9 g/ad - irregular shape, ■5.0 g/cd - spherical, and ■2.0 g/cx.
It was in the form of l-flake. 0.5% by weight of zinc stearate was added to each powder, and an attempt was made to press-form it into a ring shape in the same manner as in Example 1, but the spherical powder of (■) had so little strength that the molded product could not be handled and could not be evaluated. there were.
■、■の粉末の成形密度はそれぞれ７８％、７４％であ
った。４００℃で１２０分熱処理した結果、■の粉末の
１０ＫＨ２でのｐｅは１７０．限界周波数は３３ＭＨ２
であり、■の粉末のｌ０ＫＨ２でのｐｅは１００で、限
界周波数は４２Ｍ１ｌＺであった。このように見掛密度
が同様のレベルであってもフレーク状粉末の成形体は密
度が低いためにｐｅが低く、高いｐｅを得るには不規則
形状粉末が適していることが明白である。The compacted densities of the powders (1) and (2) were 78% and 74%, respectively. As a result of heat treatment at 400°C for 120 minutes, the pe of powder (①) at 10KH2 was 170. The limit frequency is 33MH2
The pe of the powder (■) at 10KH2 was 100, and the limit frequency was 42M11Z. As described above, it is clear that even if the apparent density is at a similar level, flaky powder compacts have a low pe due to their low density, and irregularly shaped powders are suitable for obtaining a high pe.
以上、述べたごとく本発明による、アモルファス合金圧
粉磁心は、成形性、圧縮性に優れ、圧粉の際に絶縁破壊
しにくく、かつ安価な製造法を採用し得る粉末を原料と
して得られ、高い透磁率と優れた周波数特性を有し、電
子機器内のノイズフィルター、チョークコイル等の磁心
に最適のものであり、その工業的価値が大である。As described above, the amorphous alloy powder magnetic core according to the present invention is obtained from a powder that has excellent formability and compressibility, is resistant to dielectric breakdown during compaction, and can be produced using an inexpensive manufacturing method. It has high magnetic permeability and excellent frequency characteristics, making it ideal for magnetic cores in noise filters, choke coils, etc. in electronic devices, and has great industrial value.
第１図は不規則形状のアモルファス合金粉末の見掛密度
とそれを用いて製造した圧粉成形体の抗折力との関係を
示す相関図である。FIG. 1 is a correlation diagram showing the relationship between the apparent density of an irregularly shaped amorphous alloy powder and the transverse rupture strength of a compact produced using the same.
Claims (1)
よりなり、原子百分率で表わした式、 Ｆｅ＿１＿０＿０＿−＿ａ＿−＿ｂ＿−＿ｃ・Ｃｒａ・
Ｐｂ（Ｃ、Ｂ）ｃ（１≦ａ≦８、５≦ｂ、１５≦ｂ＋ｃ
≦３０）で示される組成を有することを特徴とするアモ
ルファス合金圧粉磁心。 ２ 原料粉末が見掛密度３．５ｇ／ｃｍ＾３以下の不規
則形状である特許請求の範囲第１項記載のアモルファス
合金圧粉磁心。[Scope of Claims] 1 Consisting of one or two of Fe, Cr, P, and C or B, represented by the formula Fe_1_0_0_-_a_-_b_-_c・Cra・
Pb(C,B)c(1≦a≦8, 5≦b, 15≦b+c
≦30) An amorphous alloy powder magnetic core having a composition represented by the formula: ≦30). 2. The amorphous alloy powder magnetic core according to claim 1, wherein the raw material powder has an irregular shape with an apparent density of 3.5 g/cm^3 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61264268A JPH0793204B2 (en) | 1986-11-06 | 1986-11-06 | Amorphous alloy dust core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61264268A JPH0793204B2 (en) | 1986-11-06 | 1986-11-06 | Amorphous alloy dust core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63117406A true JPS63117406A (en) | 1988-05-21 |
| JPH0793204B2 JPH0793204B2 (en) | 1995-10-09 |
Family
ID=17400808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61264268A Expired - Lifetime JPH0793204B2 (en) | 1986-11-06 | 1986-11-06 | Amorphous alloy dust core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0793204B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08333660A (en) * | 1995-06-02 | 1996-12-17 | Res Dev Corp Of Japan | Iron-base metallic glass alloy |
| JP2002226956A (en) * | 2000-11-29 | 2002-08-14 | Alps Electric Co Ltd | Amorphous soft magnetic alloy |
| JP2004363235A (en) * | 2003-06-03 | 2004-12-24 | Alps Electric Co Ltd | Dust core |
| WO2006054822A1 (en) * | 2004-11-22 | 2006-05-26 | Kyungpook National University Industry-Academic Cooperation Foundation | Fe-based bulk amorphous alloy compositions containing more than 5 elements and composites containing the amorphous phase |
| JP2006237368A (en) * | 2005-02-25 | 2006-09-07 | Hitachi Metals Ltd | Powder magnetic core and its manufacturing method |
| WO2010084900A1 (en) | 2009-01-23 | 2010-07-29 | アルプス電気株式会社 | Iron-based soft magnetic alloy and dust core comprising the iron-based soft magnetic alloy |
| WO2011016275A1 (en) | 2009-08-07 | 2011-02-10 | アルプス・グリーンデバイス株式会社 | Fe-based amorphous alloy, dust core formed using the fe-based amorphous alloy, and dust core with embedded coil |
| JP2011235344A (en) * | 2010-05-13 | 2011-11-24 | Porite Corp | Method for manufacturing glassy metal product, and dissimilar material composite |
| WO2012098817A1 (en) | 2011-01-17 | 2012-07-26 | アルプス・グリーンデバイス株式会社 | Fe-BASED AMORPHOUS ALLOY POWDER, DUST CORE USING THE Fe-BASED AMORPHOUS ALLOY POWDER, AND COIL-EMBEDDED DUST CORE |
| WO2013015361A1 (en) * | 2011-07-28 | 2013-01-31 | アルプス・グリーンデバイス株式会社 | Fe-BASED AMORPHOUS ALLOY, AND DUST CORE OBTAINED USING Fe-BASED AMORPHOUS ALLOY POWDER |
| WO2018143427A1 (en) * | 2017-02-03 | 2018-08-09 | 山陽特殊製鋼株式会社 | Magnetic flat powder and magnetic sheet containing same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5739103A (en) * | 1980-05-29 | 1982-03-04 | Allied Chem | Glassy alloy magnetic product and manufacture |
| JPS63104407A (en) * | 1986-10-22 | 1988-05-09 | Nippon Kinzoku Kk | Dust core of amorphous alloy |
-
1986
- 1986-11-06 JP JP61264268A patent/JPH0793204B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5739103A (en) * | 1980-05-29 | 1982-03-04 | Allied Chem | Glassy alloy magnetic product and manufacture |
| JPS63104407A (en) * | 1986-10-22 | 1988-05-09 | Nippon Kinzoku Kk | Dust core of amorphous alloy |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08333660A (en) * | 1995-06-02 | 1996-12-17 | Res Dev Corp Of Japan | Iron-base metallic glass alloy |
| JP2002226956A (en) * | 2000-11-29 | 2002-08-14 | Alps Electric Co Ltd | Amorphous soft magnetic alloy |
| JP2004363235A (en) * | 2003-06-03 | 2004-12-24 | Alps Electric Co Ltd | Dust core |
| WO2006054822A1 (en) * | 2004-11-22 | 2006-05-26 | Kyungpook National University Industry-Academic Cooperation Foundation | Fe-based bulk amorphous alloy compositions containing more than 5 elements and composites containing the amorphous phase |
| US7815753B2 (en) | 2004-11-22 | 2010-10-19 | Kyungpook National University Industry-Academic Cooperation Foundation | Fe-based bulk amorphous alloy compositions containing more than 5 elements and composites containing the amorphous phase |
| JP2006237368A (en) * | 2005-02-25 | 2006-09-07 | Hitachi Metals Ltd | Powder magnetic core and its manufacturing method |
| US8282745B2 (en) | 2009-01-23 | 2012-10-09 | Alps Green Devices Co., Ltd. | Fe-based soft magnetic alloy and dust core using fe-based soft magnetic alloy |
| WO2010084900A1 (en) | 2009-01-23 | 2010-07-29 | アルプス電気株式会社 | Iron-based soft magnetic alloy and dust core comprising the iron-based soft magnetic alloy |
| US8685179B2 (en) | 2009-08-07 | 2014-04-01 | Alps Green Devices Co., Ltd. | Fe-based amorphous alloy, powder core using the same, and coil encapsulated powder core |
| WO2011016275A1 (en) | 2009-08-07 | 2011-02-10 | アルプス・グリーンデバイス株式会社 | Fe-based amorphous alloy, dust core formed using the fe-based amorphous alloy, and dust core with embedded coil |
| US9422614B2 (en) | 2009-08-07 | 2016-08-23 | Alps Green Devices Co., Ltd. | Fe-based amorphous alloy, powder core using the same, and coil encapsulated powder core |
| JP2011235344A (en) * | 2010-05-13 | 2011-11-24 | Porite Corp | Method for manufacturing glassy metal product, and dissimilar material composite |
| WO2012098817A1 (en) | 2011-01-17 | 2012-07-26 | アルプス・グリーンデバイス株式会社 | Fe-BASED AMORPHOUS ALLOY POWDER, DUST CORE USING THE Fe-BASED AMORPHOUS ALLOY POWDER, AND COIL-EMBEDDED DUST CORE |
| US8854173B2 (en) | 2011-01-17 | 2014-10-07 | Alps Green Devices Co., Ltd. | Fe-based amorphous alloy powder, dust core using the same, and coil-embedded dust core |
| WO2013015361A1 (en) * | 2011-07-28 | 2013-01-31 | アルプス・グリーンデバイス株式会社 | Fe-BASED AMORPHOUS ALLOY, AND DUST CORE OBTAINED USING Fe-BASED AMORPHOUS ALLOY POWDER |
| JP5505563B2 (en) * | 2011-07-28 | 2014-05-28 | アルプス・グリーンデバイス株式会社 | Fe-based amorphous alloy and powder magnetic core using Fe-based amorphous alloy powder |
| US9558871B2 (en) | 2011-07-28 | 2017-01-31 | Alps Electric Co., Ltd. | Fe-based amorphous alloy and dust core made using Fe-based amorphous alloy powder |
| WO2018143427A1 (en) * | 2017-02-03 | 2018-08-09 | 山陽特殊製鋼株式会社 | Magnetic flat powder and magnetic sheet containing same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0793204B2 (en) | 1995-10-09 |
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