JP2952718B2 - Heat treatment method of magnetic core - Google Patents
Heat treatment method of magnetic coreInfo
- Publication number
- JP2952718B2 JP2952718B2 JP3037645A JP3764591A JP2952718B2 JP 2952718 B2 JP2952718 B2 JP 2952718B2 JP 3037645 A JP3037645 A JP 3037645A JP 3764591 A JP3764591 A JP 3764591A JP 2952718 B2 JP2952718 B2 JP 2952718B2
- Authority
- JP
- Japan
- Prior art keywords
- heat treatment
- temperature
- magnetic
- peak temperature
- crystallization peak
- 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 - Lifetime
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、直流上の重複リップル
の平滑やノーマルモード用ノイズフィルターのコア、高
周波トランス及びアクティブフィルター用コア等に用い
られる恒透磁性の優れた磁心の製造方法に適用して有効
な技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a method of manufacturing a magnetic core having excellent magnetic permeability, which is used for a core of a noise filter for normal mode, a high frequency transformer, an active filter, etc. And effective technology.
【０００２】[0002]
【従来の技術】従来技術では、非晶質合金からなる金属
薄帯（磁性リボン）をスリット状に加工してこれを所定
回数だけ巻回し、これを熱処理（焼鈍）した後、エポキ
シ樹脂等の接着剤を含浸、固化させ、次に磁路の一部を
切断するギャップ（空隙）を設けて前記恒透磁性を実現
していた。また、その他にギャップを設けずに熱処理の
みにより目標とする恒透磁性を得る手法が以前より知ら
れていた。2. Description of the Related Art In the prior art, a thin metal ribbon (magnetic ribbon) made of an amorphous alloy is processed into a slit shape, wound a predetermined number of times, and heat-treated (annealed). An adhesive is impregnated and solidified, and then a gap (void) for cutting a part of a magnetic path is provided to realize the above-mentioned permeability. In addition, a method of obtaining a target constant magnetic permeability only by heat treatment without providing a gap has been known.
【０００３】前記恒透磁性は、磁心の製造工程における
焼鈍、すなわち熱処理温度条件に大きく依存しており、
安定した恒透磁性を得るためには熱処理温度条件を厳密
に制御する必要があった。[0003] The permanent magnetic permeability greatly depends on the annealing in the manufacturing process of the magnetic core, that is, the heat treatment temperature condition.
In order to obtain stable magnetic permeability, it was necessary to strictly control the heat treatment temperature conditions.
【０００４】[0004]
【発明が解決しようとする課題】しかし、前記熱処理条
件を厳格に制御したとしても、必ずしも目標の恒透磁性
を有する磁心が得られないことが知られていた。However, it has been known that even if the heat treatment conditions are strictly controlled, it is not always possible to obtain a magnetic core having the desired constant magnetic permeability.
【０００５】本発明者は、この原因が材料として提供さ
れる磁性リボンの特性のばらつき、すなわち組成のばら
つきに起因していることを見い出した。The present inventor has found that this is caused by variations in the characteristics of the magnetic ribbon provided as a material, ie, variations in the composition.
【０００６】図１は、磁性リボンの各素材ロットから任
意に抽出した１４本（Ｒ１〜Ｒ１４）のサンプルについ
て熱処理温度と透磁率との関係を示したものである。な
お同図における熱処理条件は大気中で、その熱処理時間
は２時間である。FIG. 1 shows the relationship between the heat treatment temperature and the magnetic permeability for 14 samples (R1 to R14) arbitrarily extracted from each material lot of the magnetic ribbon. The heat treatment conditions in the figure are in the air, and the heat treatment time is 2 hours.
【０００７】この透磁率はヒューレットパッカード株式
会社製、プレシジョンＬＣＲメータＨＰ４２８４Ａおよ
び４２８４１Ａを用いて交流磁界１００ｋHz、５ｍOe、
直流磁界０Oeの条件で測定を行ったものである。The magnetic permeability was measured using a precision LCR meter HP4284A and 42841A, manufactured by Hewlett-Packard Co., Ltd., with an alternating magnetic field of 100 kHz and 5 mOe.
The measurement was performed under the condition of a DC magnetic field of 0 Oe.
【０００８】この透磁率と恒透磁性との間には、図２で
示す様な関係があり、直流磁界０Oeにおける透磁率を測
定するだけで、直流磁界を重畳した場合の透磁率、すな
わち恒透磁性を推測することができる。The relationship between the magnetic permeability and the constant magnetic permeability has a relationship as shown in FIG. 2. By measuring the magnetic permeability at a DC magnetic field of 0 Oe, the magnetic permeability when a DC magnetic field is superimposed, ie, the constant magnetic permeability, is measured. The permeability can be inferred.
【０００９】したがって、必然的に、磁界を印加しない
状態（０Oe）における透磁率を下げることによって恒透
磁性を得ることができる。Therefore, it is necessary to lower the magnetic permeability in a state where no magnetic field is applied (0 Oe) to obtain a constant permeability.
【００１０】ところで、図１によれば、たとえば４４５
℃の温度条件で２時間の加熱処理を行った場合、透磁率
は２５０を中心に１８０〜３８０の範囲のものが同時に
生じてしまう。すなわち、温度条件を厳密に制御したと
しても、得られた磁心は、透磁率において最大２００の
差が生じてしまう可能性があり、歩留まりが極めて悪く
なる可能性があった。By the way, according to FIG.
When the heat treatment is performed at a temperature of 2 ° C. for 2 hours, a magnetic permeability in the range of 180 to 380 around 250 occurs simultaneously. That is, even if the temperature conditions are strictly controlled, the obtained magnetic core may have a difference of at most 200 in the magnetic permeability, and the yield may be extremely deteriorated.
【００１１】本発明は前記課題に鑑みてなされたもので
あり、その目的は素材ロットで提供される磁性リボン中
に特性のばらつきのあることに着目して、このようなば
らつきが生じていても定常的に製品特性の安定した磁心
を得ることにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to focus on the fact that magnetic ribbons provided in a material lot have variations in characteristics. An object is to constantly obtain a magnetic core having stable product characteristics.
【００１２】[0012]
【課題を解決するための手段】本発明は、磁心の熱処理
において、素材ロット中から任意にサンプリングした磁
性リボンの結晶化ピーク温度を測定し、この測定した結
晶化ピーク温度を、あらかじめ作成した目標透磁率にお
ける結晶化ピーク温度値と熱処理温度との関係に適用し
て熱処理温度の補正値、すなわち最適値を決定すること
を要旨とする。Means for Solving the Problems The present invention, in the heat treatment of the magnetic core is examined for crystallization peak temperature of the magnetic ribbon is optionally sampled from Filling lot was the measurement results
Apply the crystallization peak temperature to the relationship between the crystallization peak temperature value and the heat treatment temperature at the target permeability previously created.
In this case, the correction value of the heat treatment temperature , that is, the optimum value is determined.
【００１３】この結晶化ピーク温度（結晶化温度）と
は、日本工業規格（ＪＩＳ−Ｈ７１５１）に記載されて
いるアモルファス金属の結晶化温度測定方法を用いて得
ることができる。この他にも電気抵抗の温度変化による
測定方法、熱膨張による温度変化、Ｘ線回析の温度変化
等による結晶化温度測定方法を挙げることができる。こ
れらの中でＤＳＣ（Differential Scanning Calorimetr
y:示差走査熱量測定）装置を用いて結晶化ピーク温度を
求める方法が簡便で精度良く、且つ再現性良く結晶化温
度を求めることができる。The crystallization peak temperature (crystallization temperature) can be obtained by a method for measuring the crystallization temperature of an amorphous metal described in Japanese Industrial Standards (JIS-H7151). Other examples include a method of measuring the electric resistance by a temperature change, a method of measuring a crystallization temperature by a temperature change by thermal expansion, and a temperature change by X-ray diffraction. Among them, DSC (Differential Scanning Calorimetr)
y: Differential scanning calorimetry) The method of obtaining the crystallization peak temperature using an apparatus is simple, accurate, and reproducible.
【００１４】[0014]
【作用】前記手段において、熱処理を行う磁心本体とし
ては、たとえばアモルファス金属性の磁性リボンをスリ
ット状に加工してこれを巻回したものを用いることがで
きる。In the above means, the magnetic core body to be subjected to the heat treatment may be, for example, a magnetic ribbon made of an amorphous metal processed into a slit shape and wound.
【００１５】本発明で使用するアモルファス金属として
は、合金中のＦｅの含有量が５０原子％以上のＦｅ基ア
モルファス合金（金属）であり、これらのＦｅ基アモル
ファス合金としては、Ｆｅ−Ｂ，Ｆｅ−Ｂ−Ｃ，Ｆｅ−
Ｂ−Ｓｉ，Ｆｅ−Ｂ−Ｓｉ−Ｃ，Ｆｅ−Ｂ−Ｓｉ−Ｃ
ｒ，Ｆｅ−Ｃｏ−Ｂ−Ｓｉ，Ｆｅ−Ｎｉ−Ｍｏ−Ｂ等の
Ｆｅ系のものを例示できる。この中で特に好ましいＦｅ
基アモルファス金属としては、ＦｅXＳｉYＢZＭWが例示
できる。ここで、Ｘ＝５０〜８５、Ｙ＝５〜１５、Ｚ＝
５〜２５（Ｘ，Ｙ，Ｚはいずれも原子％を表す）、Ｍは
Ｃｏ，Ｎｉ，Ｎｂ，Ｔａ，Ｍｏ，Ｗ，Ｚｒ，Ｃｕ，Ｃ
ｒ，Ｍｎ，Ａｌ，Ｐ等１種または２種以上の組み合わせ
からなる金属で、W＝０〜５原子％のものである。The amorphous metal used in the present invention is an Fe-based amorphous alloy (metal) having an Fe content of 50 atomic% or more in the alloy. -BC, Fe-
B-Si, Fe-B-Si-C, Fe-B-Si-C
Fe-based materials such as r, Fe-Co-B-Si and Fe-Ni-Mo-B can be exemplified. Among them, Fe is particularly preferable.
The base amorphous metal, Fe X Si Y B Z M W can be exemplified. Here, X = 50-85, Y = 5-15, Z =
5 to 25 (X, Y, and Z each represent atomic%), M is Co, Ni, Nb, Ta, Mo, W, Zr, Cu, C
A metal composed of one or a combination of two or more of r, Mn, Al, P, etc., wherein W = 0 to 5 atomic%.
【００１６】なお、熱処理雰囲気としては、大気と同条
件であってもよいが、好ましくは窒素雰囲気等の不活性
雰囲気を用いることにより、アモルファスリボンの端部
止めに用いたカプトンテープの剥離等を防止することも
できる。The atmosphere of the heat treatment may be the same as that of the air. Preferably, an inert atmosphere such as a nitrogen atmosphere is used to remove the Kapton tape used for stopping the end of the amorphous ribbon. It can also be prevented.
【００１７】また、熱処理に際して処理条件として湿潤
雰囲気としてもよい。この場合、磁心本体を２５℃換算
における単位水蒸気量が３〜６００g/m3、特に好ましく
は２０〜２００g/m3の湿潤雰囲気中で熱処理することに
より、比較的低温領域で磁心の透磁率を抑制し、広い温
度範囲で安定的な恒透磁性を得ることができる。In the heat treatment, a wet atmosphere may be used as a treatment condition. In this case, the magnetic core body is heat-treated in a humid atmosphere having a unit water vapor content of 3 to 600 g / m 3 , particularly preferably 20 to 200 g / m 3 in terms of 25 ° C., so as to reduce the magnetic permeability of the core in a relatively low temperature region. It is possible to obtain a stable constant magnetic permeability over a wide temperature range.
【００１８】本発明では、まず熱処理前の素材ロットか
ら磁性リボンを任意に抽出し、この磁性リボンの一部を
切り取り、これを試料としてＤＳＣ装置を用いて結晶化
ピーク温度を測定する。In the present invention, first, a magnetic ribbon is arbitrarily extracted from a material lot before heat treatment, a part of the magnetic ribbon is cut out, and a sample is used as a sample to measure a crystallization peak temperature using a DSC device.
【００１９】図３は、磁性リボンを２０mg試料として秤
量し、ＤＳＣ装置を用いて測定した差動熱量の変化を示
しており、同図より結晶化ピーク温度（Ｔｘ）が判明す
る。FIG. 3 shows the change in the differential calorie measured by weighing a magnetic ribbon as a 20 mg sample and using a DSC device. The figure shows the crystallization peak temperature (Tx).
【００２０】次に、あらかじめ測定された目標透磁率に
おける熱処理温度と結晶化ピーク温度（Ｔｘ）との関係
式に前記ＤＳＣ装置からの測定温度値を代入し、熱処理
温度を決定する。Next, the heat treatment temperature is determined by substituting the measured temperature value from the DSC apparatus into the relational expression between the heat treatment temperature and the crystallization peak temperature (Tx) at the previously measured target magnetic permeability.
【００２１】前記関係式は、たとえば以下のように導く
ことができる。このような関係式は、たとえば目標透磁
率における熱処理温度と結晶化ピーク温度との関係をあ
らかじめ複数のロット素材でサンプリングしておくこと
により得られる。The above relational expression can be derived, for example, as follows. Such a relational expression can be obtained, for example, by sampling the relationship between the heat treatment temperature and the crystallization peak temperature at the target magnetic permeability with a plurality of lot materials in advance.
【００２２】図４は、透磁率２５０における結晶化ピー
ク温度に対する熱処理温度の変化を示しており、図５は
透磁率３００における結晶化ピーク温度に対する熱処理
温度の変化を示している。FIG. 4 shows the change of the heat treatment temperature with respect to the crystallization peak temperature at the magnetic permeability of 250, and FIG. 5 shows the change of the heat treatment temperature with respect to the crystallization peak temperature at the magnetic permeability of 300.
【００２３】両図に示すように、結晶化ピーク温度と熱
処理温度との間には正の強い相関関係があることが見い
出され、これから最小自乗法により下記の数１さらに好
ましくは数２が導き出される。As shown in both figures, it has been found that there is a strong positive correlation between the crystallization peak temperature and the heat treatment temperature, from which the following equation (1), more preferably, the following equation (2) is derived by the least square method. It is.
【００２４】[0024]
【数１】 Ｔ（℃）＝０．９２８Ｔｘ１−３１．８６## EQU1 ## T (° C.) = 0.928Tx1−31.86
【００２５】[0025]
【数２】 Ｔ（℃）＝０．７６６Ｔｘ１＋４９．０６ 前記数１および数２において、Ｔは目標透磁率が得られ
る熱処理制御温度であり、Ｔｘ１は図３における第１結
晶化ピーク温度である。いずれも相関係数は０．９８以
上である。T (° C.) = 0.766 Tx1 + 49.06 In the above equations (1) and (2), T is a heat treatment control temperature at which a target magnetic permeability is obtained, and Tx1 is a first crystallization peak temperature in FIG. In each case, the correlation coefficient is 0.98 or more.
【００２６】電気炉における熱処理温度は、この熱処理
制御温度（Ｔ）に基づきこの電気炉を１℃ずつ制御す
る。The heat treatment temperature in the electric furnace is controlled by 1 ° C. at a time based on the heat treatment control temperature (T).
【００２７】このように、数１および数２より決定した
熱処理制御温度により電気炉を制御して熱処理を行う。As described above, the electric furnace is controlled by the heat treatment control temperature determined from the equations (1) and (2) to perform the heat treatment.
【００２８】[0028]
【実施例１】以下、本発明の実施例を説明する。Embodiment 1 An embodiment of the present invention will be described below.
【００２９】アライド社のアモルファスリボン（製品
名：Ｍｅｔｇｌａｓ２６０５Ｓ−２：Ｆｅ78Ｂ13Ｓｉ9
（原子％），厚さ２１μｍ，幅１０mm）を巻回して、外
径２５mm，内径１５mmのトロイダル状の磁心本体を得
た。Allied amorphous ribbon (product name: Metglas 2605S-2: Fe 78 B 13 Si 9)
(Atomic%), a thickness of 21 μm, and a width of 10 mm) to obtain a toroidal magnetic core body having an outer diameter of 25 mm and an inner diameter of 15 mm.
【００３０】一方、前記アモルファスリボンの各製品ロ
ットより任意に抽出した試料についてＤＳＣ装置を用い
て結晶化ピーク温度（Ｔｘ）を測定した。On the other hand, the crystallization peak temperature (Tx) of a sample arbitrarily extracted from each product lot of the amorphous ribbon was measured using a DSC device.
【００３１】次に、この測定値を前述の数１または数２
に代入して熱処理温度（Ｔ）を決定し、これに基づいて
電気炉を制御した。Next, this measured value is calculated by using the above equation (1) or (2).
And the heat treatment temperature (T) was determined, and the electric furnace was controlled based on the temperature.
【００３２】このとき本実施例では、第１結晶化ピーク
温度（Ｔｘ１）が５１２．５℃についてその熱処理温度
（Ｔ）を４４４℃に制御した。その結果、目標透磁率２
５０に対して２４５〜２５５の範囲のものが歩留り９２
％で得られた。At this time, in this embodiment, the heat treatment temperature (T) was controlled to 444 ° C. when the first crystallization peak temperature (Tx1) was 512.5 ° C. As a result, the target permeability 2
A yield of 92 is in the range of 245 to 255 with respect to 50.
%.
【００３３】前記熱処理の完了後、この磁心本体にギャ
ップを設けることなく合成樹脂からなるケースに収容
し、磁心とした。After the completion of the heat treatment, the magnetic core body was housed in a case made of synthetic resin without providing a gap to form a magnetic core.
【００３４】[0034]
【実施例２】前記実施例１と同様の、アライド社のアモ
ルファスリボン（製品名：Ｍｅｔｇｌａｓ２６０５Ｓ−
２：Ｆｅ78Ｂ13Ｓｉ9（原子％），厚さ２１μｍ，幅１
０mm）を巻回して、外径２５mm，内径１５mmのトロイダ
ル状の磁心本体を得た。Example 2 An amorphous ribbon manufactured by Allied (product name: Metglas 2605S-
2: Fe 78 B 13 Si 9 (atomic%), thickness 21 μm, width 1
0 mm) to obtain a toroidal magnetic core body having an outer diameter of 25 mm and an inner diameter of 15 mm.
【００３５】一方、前記アモルファスリボンの各製品ロ
ットより任意に抽出した試料についてＤＳＣ装置を用い
て結晶化ピーク温度（Ｔｘ）を測定した。On the other hand, the crystallization peak temperature (Tx) of a sample arbitrarily extracted from each product lot of the amorphous ribbon was measured using a DSC device.
【００３６】次に、この測定値を前述の数１または数２
に代入して熱処理温度（Ｔ）を決定し、これに基づいて
電気炉を制御した。Next, this measured value is calculated by using the above equation (1) or (2).
And the heat treatment temperature (T) was determined, and the electric furnace was controlled based on the temperature.
【００３７】このとき本実施例では、第１結晶化ピーク
温度（Ｔｘ１）が５１６．５℃についてその熱処理温度
（Ｔ）を４４５℃に制御した。その結果、目標透磁率３
００に対して２９０〜３００の範囲のものが歩留り９０
％で得られた。At this time, in this embodiment, the heat treatment temperature (T) was controlled to 445 ° C. when the first crystallization peak temperature (Tx1) was 516.5 ° C. As a result, the target permeability 3
The yield of 90 ranges from 290 to 300
%.
【００３８】[0038]
【発明の効果】本発明によれば、素材として提供される
熱処理前の磁性リボンにばらつきが生じている場合であ
っても、定常的に製品特性の安定した磁心を得ることが
できる。According to the present invention, a magnetic core having stable product characteristics can be constantly obtained even when the magnetic ribbon provided as a raw material before the heat treatment has a variation.
【図１】磁性リボンのロット毎の熱処理温度と透磁率と
のばらつきを示すグラフ図FIG. 1 is a graph showing a variation between a heat treatment temperature and a magnetic permeability for each lot of a magnetic ribbon.
【図２】磁性リボンにおける直流重畳磁界に対する透磁
率の変化を示すグラフ図FIG. 2 is a graph showing a change in magnetic permeability of a magnetic ribbon with respect to a DC superimposed magnetic field.
【図３】実施例において、ＤＳＣ装置を用いて測定され
た作動熱量の変化を示すグラフ図FIG. 3 is a graph showing a change in working calorie measured using a DSC device in the example.
【図４】透磁率２５０における結晶化ピーク温度に対す
る熱処理温度の変化を示すグラフ図FIG. 4 is a graph showing a change in heat treatment temperature with respect to a crystallization peak temperature at a magnetic permeability of 250.
【図５】透磁率３００における結晶化ピーク温度に対す
る熱処理温度の変化を示すグラフ図FIG. 5 is a graph showing a change in heat treatment temperature with respect to a crystallization peak temperature at a magnetic permeability of 300.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 吉村 勝 千葉県君津郡袖ヶ浦町長浦字拓二号580 番32三井石油化学工業株式会社内 (58)調査した分野(Int.Cl.6，ＤＢ名) H01F 1/153,41/02 C21D 6/00,8/12 C22F 1/00,1/10 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaru Yoshimura 580-32 Takuji, Nagaura, Sodegaura-cho, Kimitsu-gun, Chiba Pref. Mitsui Petrochemical Industries Co., Ltd. (58) Field surveyed (Int.Cl. 6 , DB name) ) H01F 1 / 153,41 / 02 C21D 6 / 00,8 / 12 C22F 1 / 00,1 / 10
Claims (2)
に、素材ロット中から任意にサンプリングした磁性リボ
ンの結晶化ピーク温度を測定し、前記結晶化ピーク温度 を、あらかじめ作成した目標透磁
率における結晶化ピーク温度値と熱処理温度との関係に
適用して最適な熱処理温度を決定することを特徴とする
磁心の熱処理方法。When a heat treatment is performed after winding a magnetic ribbon, a crystallization peak temperature of a magnetic ribbon arbitrarily sampled from a raw material lot is measured, and the crystallization peak temperature is determined based on a target magnetic permeability previously prepared. Relationship between crystallization peak temperature and heat treatment temperature
A heat treatment method for a magnetic core, wherein an optimum heat treatment temperature is determined by applying the heat treatment.
定法を用いて求められる結晶化発熱ピーク温度とするこ
とを特徴とする請求項１記載の磁心の熱処理方法。2. The method according to claim 1, wherein the crystallization peak temperature is a crystallization exothermic peak temperature determined by a differential scanning calorimetry.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3037645A JP2952718B2 (en) | 1991-03-04 | 1991-03-04 | Heat treatment method of magnetic core |
| CN92102499A CN1048576C (en) | 1991-03-04 | 1992-03-04 | Method of manufacturing and appolying heat treatment to magnetic core |
| AT92905956T ATE154158T1 (en) | 1991-03-04 | 1992-03-04 | METHOD FOR PRODUCING A MAGNETIC CORE BY HEAT TREATING THE SAME |
| US07/941,113 US5439534A (en) | 1991-03-04 | 1992-03-04 | Method of manufacturing and applying heat treatment to a magnetic core |
| KR1019920702742A KR970007511B1 (en) | 1991-03-04 | 1992-03-04 | Method of manufacturing & applying heat treatment to a agnetic core |
| PCT/JP1992/000256 WO1992015997A1 (en) | 1991-03-04 | 1992-03-04 | Method of manufacturing magnetic core and of heat-treating the same |
| EP92905956A EP0527233B1 (en) | 1991-03-04 | 1992-03-04 | Method of manufacturing magnetic core by heat-treating the same |
| DE69220150T DE69220150T2 (en) | 1991-03-04 | 1992-03-04 | METHOD FOR PRODUCING A MAGNETIC CORE BY HEAT TREATMENT THEREOF |
| CA002082061A CA2082061C (en) | 1991-03-04 | 1992-03-04 | Method of manufacturing and applying heat treatment to a magnetic core |
| TW081101775A TW201844B (en) | 1991-03-04 | 1992-03-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3037645A JP2952718B2 (en) | 1991-03-04 | 1991-03-04 | Heat treatment method of magnetic core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04275411A JPH04275411A (en) | 1992-10-01 |
| JP2952718B2 true JP2952718B2 (en) | 1999-09-27 |
Family
ID=12503389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3037645A Expired - Lifetime JP2952718B2 (en) | 1991-03-04 | 1991-03-04 | Heat treatment method of magnetic core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2952718B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2755292B1 (en) * | 1996-10-25 | 1998-11-20 | Mecagis | PROCESS FOR MANUFACTURING A MAGNETIC CORE IN NANOCRYSTALLINE SOFT MAGNETIC MATERIAL |
| EP3050977B1 (en) * | 2013-09-27 | 2018-11-21 | Hitachi Metals, Ltd. | Method for producing fe-based nano-crystal alloy, and method for producing fe-based nano-crystal alloy magnetic core |
-
1991
- 1991-03-04 JP JP3037645A patent/JP2952718B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04275411A (en) | 1992-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7028290B2 (en) | Manufacturing method of nanocrystal alloy magnetic core | |
| US4187128A (en) | Magnetic devices including amorphous alloys | |
| CA1056180A (en) | Magnetic devices including amorphous alloys | |
| CN1134034C (en) | Process for mfg. magnetic component made of iron-based soft magnetic alloy having nanocrys talline structure | |
| EP0038957B1 (en) | Rolled core | |
| JPS6218620B2 (en) | ||
| Luborsky | Kinetics of reorientation of magnetically induced anisotropy in amorphous Ni40Fe40P14B6 | |
| WO1993009549A1 (en) | Heat treatment process and soft magnetic alloys produced thereby | |
| JPS5934781B2 (en) | Method for reducing magnetic hysteresis loss of soft magnetic amorphous alloy ribbon material | |
| KR850000596B1 (en) | Iron-boron-silicon ternary armorphous alloys | |
| EP0527233B1 (en) | Method of manufacturing magnetic core by heat-treating the same | |
| EP3157021B1 (en) | Method for producing fe-based nanocrystalline alloy core | |
| EP3050977B1 (en) | Method for producing fe-based nano-crystal alloy, and method for producing fe-based nano-crystal alloy magnetic core | |
| SK144597A3 (en) | Method of producing a magnetic core made of nanocrystalline soft magnetic material | |
| JP2952718B2 (en) | Heat treatment method of magnetic core | |
| JP2952716B2 (en) | Heat treatment method of magnetic core | |
| EP0035037A1 (en) | Microcrystalline thin strip for magnetic material having high magnetic permeability | |
| JP2952717B2 (en) | Heat treatment method of magnetic core | |
| EP2320436A1 (en) | Amorphous magnetic alloys, associated articles and methods | |
| Arnold | Nickel-chromium-aluminium-copper resistance wire | |
| Fujimori et al. | On the magnetically induced anisotropy in amorphous ferromagnetic alloys | |
| JP2588450B2 (en) | Amorphous alloy ribbon with improved crystallization resistance of surface layer and method for producing the same | |
| JPH0219442A (en) | High saturated magnetic flux density ferrous alloy having superfine crystalline structure | |
| EP3588518A1 (en) | Magnetic core unit, current transformer, and method for manufacturing same | |
| JPH0351081B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080716 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080716 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090716 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090716 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100716 Year of fee payment: 11 |