JPS62194605A - Manufacture of magnetic core - Google Patents
Manufacture of magnetic coreInfo
- Publication number
- JPS62194605A JPS62194605A JP3505086A JP3505086A JPS62194605A JP S62194605 A JPS62194605 A JP S62194605A JP 3505086 A JP3505086 A JP 3505086A JP 3505086 A JP3505086 A JP 3505086A JP S62194605 A JPS62194605 A JP S62194605A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic core
- alloy thin
- bodies
- magnetic alloy
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 229910001004 magnetic alloy Inorganic materials 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims abstract description 4
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims description 11
- 230000035699 permeability Effects 0.000 abstract description 12
- 238000010791 quenching Methods 0.000 abstract description 8
- 230000000171 quenching effect Effects 0.000 abstract description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000395 magnesium oxide Substances 0.000 abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 230000001050 lubricating effect Effects 0.000 abstract description 2
- 238000000137 annealing Methods 0.000 abstract 2
- 238000001816 cooling Methods 0.000 description 14
- 230000008602 contraction Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010583 slow cooling Methods 0.000 description 3
- 239000000110 cooling liquid Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】 〔発明の技術分野〕 本発明は磁心の製造方法に関する。[Detailed description of the invention] [Technical field of invention] The present invention relates to a method for manufacturing a magnetic core.
磁性合金薄体よりなる磁心を、例えばノイズフィルター
・トランス用磁心として用いる場合は高い透磁率を有す
る磁心が要求される。そのため磁気特性の良好である非
晶質合金薄帯の使用が実用化されている。When a magnetic core made of a thin magnetic alloy is used, for example, as a magnetic core for a noise filter or transformer, a magnetic core having high magnetic permeability is required. Therefore, the use of amorphous alloy ribbons with good magnetic properties has been put into practical use.
従来、非晶質合金薄帯を高い透磁率を有する磁心として
用いる場合は、非晶質合金薄帯を巻回して円環状に成形
後、キューリー点以上結晶化編度以下で一定時闇の熱処
理を行い、その後この熱処理温度からの急冷工程を設は
所望の磁気特性を得ている。この急冷工程においてキュ
ーリー点を通過する際の冷却速度が大きいほど磁気特性
は良好になる。特にコバルト系非晶質合金薄帯を用いる
場合はこの効果が大きい。Conventionally, when an amorphous alloy ribbon is used as a magnetic core with high magnetic permeability, the amorphous alloy ribbon is wound and formed into an annular shape, and then heat-treated in the dark for a certain period of time at a temperature above the Curie point and below the crystallization degree. After that, a quenching process from this heat treatment temperature is performed to obtain the desired magnetic properties. In this quenching step, the faster the cooling rate when passing through the Curie point, the better the magnetic properties will be. This effect is particularly significant when a cobalt-based amorphous alloy ribbon is used.
しかし、前記磁心の急冷工程により得られる磁気特性は
バラツキが生じやすく、所望の磁気特性を安定して得る
ことができない場合があった。However, the magnetic properties obtained by the quenching step of the magnetic core tend to vary, and it may not be possible to stably obtain the desired magnetic properties.
本発明は、上記問題を解消し、十分な磁気特性、特に高
透磁率を有する磁心を安定して得ることができる￥ｌ造
方法を提供するものである。The present invention solves the above problems and provides a manufacturing method capable of stably obtaining a magnetic core having sufficient magnetic properties, particularly high magnetic permeability.
本発明者は、上記目的を達成すべく鋭意研究を重ねた結
果数のような現象を見出し本発明を完成した。すなわち
、磁心はキューリー点以上結晶化温度以下の熱処理温度
からの急冷工程の際に熱収縮を生じ、隣接する外側と内
側の磁性合金薄体の熱収縮状態の差により、あるいは磁
性合金薄体相互の摩擦による歪または変形を発生し、そ
のために磁気特性が劣下するのである。In order to achieve the above object, the inventor of the present invention has conducted extensive research, and as a result, has discovered a number of phenomena and has completed the present invention. In other words, the magnetic core undergoes thermal contraction during the rapid cooling process from a heat treatment temperature above the Curie point and below the crystallization temperature, and due to the difference in the thermal contraction state of the adjacent outer and inner magnetic alloy thin bodies, or due to the mutual contraction of the magnetic alloy thin bodies. This causes distortion or deformation due to friction, which deteriorates the magnetic properties.
特にこれらの現象は高温度域での急冷状態において顕著
である。したがって本発明者は、熱収縮による歪を低減
するためには急冷の際の温度差を小さくすればよいとい
う見地より、熱処理温度からキューリー点直上までは除
冷を行い、その後急冷することにより十分な磁気特性、
特に高透磁率を有づる磁心を得るしのである。キューリ
ー点は磁性変態点でありキューリー点以上から磁心を急
冷することにより良好な磁気特性を得ることができる。In particular, these phenomena are remarkable in rapid cooling in a high temperature range. Therefore, from the viewpoint that in order to reduce the distortion caused by thermal contraction, it is sufficient to reduce the temperature difference during rapid cooling, the inventors believe that slow cooling from the heat treatment temperature to just above the Curie point, and then rapid cooling is sufficient. magnetic properties,
In particular, it is possible to obtain a magnetic core with high magnetic permeability. The Curie point is a magnetic transformation point, and good magnetic properties can be obtained by rapidly cooling the magnetic core from the Curie point or above.
すなわら、急冷過程による通過が必要とさねるキューリ
ー点の直上までのＩｓ渇領領域は歪が発生しにくい徐冷
を行い、その後急冷して所定の磁気特性を得るものであ
る。ここで急冷とは磁心を室温以下の冷却液（例えば水
等）に浸すかあるいは磁心に冷却液を吹きかける等によ
り急激に冷却するものである。また除冷とは、例えば炉
冷等のように磁心に冷却の際の影響が出ない冷却速度で
の冷却をさす。In other words, the Is depletion region up to just above the Curie point, which must be passed through the rapid cooling process, is subjected to slow cooling where distortion is less likely to occur, and then rapidly cooled to obtain predetermined magnetic properties. Here, quenching refers to rapidly cooling the magnetic core by immersing it in a cooling liquid (for example, water, etc.) below room temperature or by spraying the magnetic core with a cooling liquid. Further, slow cooling refers to cooling at a cooling rate that does not affect the magnetic core during cooling, such as furnace cooling.
また、熱収縮の際の磁性合金薄体相互間の摩擦力を低減
し、熱収縮による歪を減少するために磁性合金薄体相互
間に潤滑媒体を存在させると本発明の効果がより大きく
なる。例えば磁性合金薄体を巻回する前工程で磁性合金
薄体表面に耐熱性を有し非磁性であるセラミック粉（例
えばアルミナ、マグネシア等）をコーティングする。本
発明の熱処理方法は急冷による磁気特性の影響が大きな
ＣＯＯ非晶質合金薄帯よりくする磁心の製造方法に対し
て特に有効である。更に本発明は急冷の際に熱収縮の影
響を太き（受ける大型の磁心、または肉厚の磁心に対し
て有効である。Furthermore, the effect of the present invention will be even greater if a lubricating medium is present between the magnetic alloy thin bodies in order to reduce the frictional force between the magnetic alloy thin bodies during thermal contraction and reduce the distortion caused by thermal contraction. . For example, in the process before winding the magnetic alloy thin body, the surface of the magnetic alloy thin body is coated with heat-resistant and non-magnetic ceramic powder (eg, alumina, magnesia, etc.). The heat treatment method of the present invention is particularly effective for manufacturing a magnetic core made of COO amorphous alloy ribbon, whose magnetic properties are greatly affected by rapid cooling. Furthermore, the present invention is effective for large magnetic cores or thick magnetic cores that are subject to the effects of thermal contraction during rapid cooling.
ＣＯ系系非晶質合金布帯用いて可飽和コア用磁心を製造
する場合の実施例を説明する。An example will be described in which a magnetic core for a saturable core is manufactured using a CO-based amorphous alloy cloth strip.
実施例１
巾１０１１厚さ１８μ履のＣＯＯ非晶質合金薄帯を巻回
し、外径３０ｎ＋ｍ、内径１５ＩＩＩＩ１１高ざ１０ｍ
５の巻磁心を得た。Example 1 A COO amorphous alloy ribbon with a width of 1011 and a thickness of 18 μm is wound, with an outer diameter of 30n+m, an inner diameter of 15III11, and a height of 10m.
A winding core of 5 was obtained.
この磁心に約４５０℃で１時間の熱９ａ理を施しその侵
約３００℃のキューリー点直上まで除冷（放冷）し、キ
ューリー点直上から水中急冷を行った。得られた磁心（
試料１）の透磁率の周波数に対する変化を第１図に示す
。また、比較とし、て熱処理温度から直ちに水中に投入
する急冷によりＩＦＩられた磁心（試料３）の透磁率の
周波数に対する変化を第１図に示す。This magnetic core was subjected to a heat treatment at about 450° C. for 1 hour, slowly cooled (cooled) to just above the Curie point of 300° C., and then rapidly cooled in water from just above the Curie point. The obtained magnetic core (
Figure 1 shows the change in magnetic permeability of sample 1) with respect to frequency. For comparison, FIG. 1 shows the change in magnetic permeability versus frequency of a magnetic core (sample 3) subjected to IFI by quenching immediately after the heat treatment temperature in water.
第１図より明らかなように、実施例により得られた磁心
は従来の製造方法によるものに比べ高い透磁率を有する
磁心を得ることができる。As is clear from FIG. 1, the magnetic core obtained by the example can have a higher magnetic permeability than that obtained by the conventional manufacturing method.
実施例２
巾１０ＩＩＩｌｌ、厚さ１８μ−のＣＯＯ非晶質合金薄
帯をマグネシアスラリーに浸漬した後、乾燥することに
より薄帯表面にマグネシア（ＭｇＯ）を約１０μｍコー
ティングした。その後この薄帯を巻回し、外径３０ａｕ
＋、中径１５ｍ（高さ１００１１１１の巻磁心を成形し
、その後約４５０℃で１時間の熱処理を行い、続けて約
３００℃のキューリー点直上まで除冷し、キューリー点
直上から水中急冷を行い所望の磁心を得た。得られた磁
心（試料２）の透磁率の周波数に対する変化を第１図に
併せて示す。Example 2 A COO amorphous alloy ribbon having a width of 10IIIll and a thickness of 18 μm was immersed in a magnesia slurry and then dried to coat the surface of the ribbon with magnesia (MgO) to a thickness of approximately 10 μm. After that, this thin strip was wound and the outer diameter was 30au.
+, a wound core with a medium diameter of 15 m (height 1001111 mm) was formed, then heat treated at about 450°C for 1 hour, then gradually cooled to about 300°C, just above the Curie point, and then rapidly cooled in water from just above the Curie point. A desired magnetic core was obtained. Figure 1 also shows the change in magnetic permeability of the obtained magnetic core (Sample 2) with respect to frequency.
その結果、薄帯表面にセラミック粉をコーティングした
ものを用いた本実施例による磁心はさらに高い透磁率を
有する。特に本実施例によるものは高周波領域での改善
効果が大ぎい。As a result, the magnetic core according to this example, in which the surface of the ribbon is coated with ceramic powder, has even higher magnetic permeability. In particular, the improvement effect in the high frequency region is great in this embodiment.
本発明によれば、優れた気持性、特に高透磁率を有する
磁心を安定して得ることができる。According to the present invention, a magnetic core having excellent feelability, particularly high magnetic permeability, can be stably obtained.
第１図は磁心の透磁率の周波数に対する変化を示すグラ
フである。
代理人弁理士 則 近 憲 佑
同 渇 山 幸 夫第１図FIG. 1 is a graph showing changes in permeability of a magnetic core with respect to frequency. Representative Patent Attorney Noriyuki Chika Yudo Yukio Yama Figure 1
Claims (4)
際し、前記熱処理温度からキューリー点直上までは除冷
を行いその後急冷する磁心の製造方法。(1) A method for producing a magnetic core, in which a magnetic core formed by winding a magnetic alloy thin body is heat-treated, and the magnetic core is slowly cooled from the heat treatment temperature to just above the Curie point, and then rapidly cooled.
グしている特許請求の範囲第１項に記載の磁心の製造方
法。(2) The method for manufacturing a magnetic core according to claim 1, wherein the surface of the magnetic alloy thin body is coated with ceramic powder.
範囲第１項または第２項に記載の磁心の製造方法。(3) The method for manufacturing a magnetic core according to claim 1 or 2, wherein the magnetic alloy thin body is an amorphous alloy ribbon.
許請求の範囲第３項に記載の磁心の製造方法。(4) The method for manufacturing a magnetic core according to claim 3, wherein the amorphous alloy ribbon is a Co-based amorphous alloy ribbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3505086A JPS62194605A (en) | 1986-02-21 | 1986-02-21 | Manufacture of magnetic core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3505086A JPS62194605A (en) | 1986-02-21 | 1986-02-21 | Manufacture of magnetic core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62194605A true JPS62194605A (en) | 1987-08-27 |
Family
ID=12431209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3505086A Pending JPS62194605A (en) | 1986-02-21 | 1986-02-21 | Manufacture of magnetic core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62194605A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109994311A (en) * | 2019-04-26 | 2019-07-09 | 通变电器有限公司 | A kind of resistance to shorting amorphous alloy transformer core noise-reduction method |
-
1986
- 1986-02-21 JP JP3505086A patent/JPS62194605A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109994311A (en) * | 2019-04-26 | 2019-07-09 | 通变电器有限公司 | A kind of resistance to shorting amorphous alloy transformer core noise-reduction method |
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