JP2007007714A - Method and apparatus for producing iron-based amorphous thin steel excellent in magnetic characteristic - Google Patents

Method and apparatus for producing iron-based amorphous thin steel excellent in magnetic characteristic Download PDF

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JP2007007714A
JP2007007714A JP2005194778A JP2005194778A JP2007007714A JP 2007007714 A JP2007007714 A JP 2007007714A JP 2005194778 A JP2005194778 A JP 2005194778A JP 2005194778 A JP2005194778 A JP 2005194778A JP 2007007714 A JP2007007714 A JP 2007007714A
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cooling
iron
cooling roll
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amorphous ribbon
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JP4969808B2 (en
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Shigekatsu Ozaki
茂克 尾崎
Takeshi Imai
武 今井
Yuji Hiramoto
祐二 平本
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Nippon Steel Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To produce an iron-based amorphous thin strip excellent in magnetic characteristic with which a secondary cooling means is not used, but a cooling roll having the necessary thermal conductivity and wall thickness is used, and the suitable cooling pattern and the cooling velocity are secured by keeping the contacting length of the amorphous thin strip after quickly cooling and solidifying with the cooling roll within the suitable range. <P>SOLUTION: In a method and apparatus for producing the amorphous thin strip by quickly cooling and solidifying the iron-based molten metal with the surface of the cooling roll during rotating at high speed; (a) the cooling roll having the water cooling structure in the inner part whose thermal conductivity λ is 80 W/(m×K)≤λ≤260 W/(m×K) and wall thickness d is 5 mm≤d≤25 mm (desirably, this roll diameter is 800 mm to 1,500 mm), is used, and (b) the contacting length Lz of the thin strip with the cooling roll in the interval from the solidification starting point, in which the iron-based molten metal is solidified and the amorphous thin strip is formed, till the thin strip separates from the cooling roll, is controlled to be R/4≤Lz (R: the diameter of the cooling roll). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、鉄系溶融金属を高速回転中の冷却ロールの表面で急冷凝固させて、磁気特性に優れた鉄系非晶質薄帯を製造する方法と装置に関するものである。   The present invention relates to a method and apparatus for producing an iron-based amorphous ribbon having excellent magnetic properties by rapidly solidifying an iron-based molten metal on the surface of a cooling roll rotating at high speed.

鉄系溶融金属を高速回転中の冷却ロールの表面で急冷凝固させて非晶質薄帯を製造する方法として、遠心急冷法、単ロール法、双ロール法等が知られているが、これらの方法により製造される非晶質合金薄帯の磁気特性や機械特性は、成分組成に依存することは勿論のこと、非晶質薄帯自身の冷却速度にも大きく依存する。   As a method for producing an amorphous ribbon by rapidly solidifying iron-based molten metal on the surface of a cooling roll that is rotating at high speed, a centrifugal quenching method, a single roll method, a twin roll method, etc. are known. The magnetic properties and mechanical properties of the amorphous alloy ribbon produced by the method depend not only on the component composition but also on the cooling rate of the amorphous ribbon itself.

それ故、従来、冷却速度向上のために、冷却ロールによる冷却途中、又は、薄帯が冷却ロールから離れた後の薄帯搬送途中で、非晶質薄帯又は冷却ロールを、二次的手段を用いて冷却する方法が幾つか提案された(特許文献１〜４、参照)。   Therefore, conventionally, in order to improve the cooling rate, the amorphous ribbon or the cooling roll is a secondary means in the middle of cooling by the cooling roll or in the middle of the ribbon feeding after the ribbon is separated from the cooling roll. Several methods have been proposed for cooling by using (see Patent Documents 1 to 4).

しかし、これらの方法は、冷却設備の制御が難しい、冷却設備コストが高い、又は、冷却能力が低い等の課題を抱えていた。   However, these methods have problems such as difficulty in controlling the cooling equipment, high cooling equipment costs, and low cooling capacity.

そこで、本出願人は、これらの課題を解決する二次冷却方法として、巻き取る前の薄板の温度をオンラインで測定し、薄帯温度が２００℃超である場合に、気化温度２００℃以下で、平均粒径５００μm以下の微小粒液体(水、アルコール類、これらの混合体)を含有したガスを薄帯表面に直接吹付ける方法を、特許文献５で提案した。   Therefore, as a secondary cooling method for solving these problems, the present applicant measures the thin plate temperature before winding up online, and when the ribbon temperature is higher than 200 ° C., the vaporization temperature is 200 ° C. or lower. Patent Document 5 proposed a method of directly spraying a gas containing a fine particle liquid (water, alcohols, or a mixture thereof) having an average particle diameter of 500 μm or less onto the surface of the ribbon.

この方法によれば、非晶質薄帯の冷却速度を、オンラインで適確に制御することができるので、磁気特性及び機械特性に優れた非晶質薄帯を生産性よく製造することができるが、別途、微小粒液体を完全に気化するオンライン制御装置や、微小粒液体を含むガスの飛散を防止するガス飛散防止設備等を必要とするので、冷却設備コストが増加する。   According to this method, the cooling rate of the amorphous ribbon can be accurately controlled online, so that an amorphous ribbon having excellent magnetic properties and mechanical properties can be produced with high productivity. However, separately, an on-line control device that completely vaporizes the fine particle liquid, a gas scattering prevention device that prevents the gas containing the fine particle liquid from scattering, and the like are required, which increases the cost of the cooling facility.

また、本出願人は、単ロール法による非晶質薄帯の製造において、巻き取り後の自己焼鈍による特性劣化(特に、割れや破断)を抑制するため、巻き取り直前の非晶質薄帯を２５０℃以下まで冷却する方法を、特許文献６で提案した。   In addition, in the manufacture of an amorphous ribbon by the single roll method, the applicant of the present invention is to suppress the deterioration of characteristics (particularly, cracking and fracture) due to self-annealing after winding, so that the amorphous ribbon immediately before winding is used. Patent Document 6 proposed a method of cooling to a temperature of 250 ° C. or lower.

非晶質薄帯の温度を２５０℃以下に冷却することで、該薄帯の自己焼鈍による特性劣化を防止することができる。しかしながら、例えば、凝固直後の非晶質薄帯を、冷却速度を大きくし１００℃以下に冷却する場合、自己焼鈍による劣化は生じないが、冷却ロール上における非晶質薄帯の冷却速度が大きくなり過ぎ、該薄帯には、過冷却に起因する歪が生じ、逆に、磁気特性が悪化する。   By cooling the temperature of the amorphous ribbon to 250 ° C. or lower, it is possible to prevent deterioration of characteristics due to self-annealing of the ribbon. However, for example, when the amorphous ribbon immediately after solidification is cooled to 100 ° C. or less by increasing the cooling rate, deterioration due to self-annealing does not occur, but the cooling rate of the amorphous ribbon on the cooling roll is large. As a result, the ribbon is distorted due to overcooling, and the magnetic properties are deteriorated.

上記方法の一態様においては、非晶質薄帯の剥離位置を調整し、非晶質薄帯を２５０℃以下まで冷却するが、非晶質帯の剥離位置が異なると、非晶質薄帯の巻取位置を変更する必要があり、製造した非晶質薄帯の巻き取りが難しくなる。   In one embodiment of the above method, the peeling position of the amorphous ribbon is adjusted and the amorphous ribbon is cooled to 250 ° C. or lower. Therefore, it is difficult to wind the manufactured amorphous ribbon.

また、非晶質帯の剥離位置を一定とするために、二次的冷却手段（例えば、二次冷却ロール、冷却ガス噴きつけ装置等)を配置すれば、設備コストが上昇するだけでなく、非晶質薄帯の通板制御も困難となる。   Further, if a secondary cooling means (for example, a secondary cooling roll, a cooling gas spraying device, etc.) is arranged to make the separation position of the amorphous band constant, not only the equipment cost increases, It is also difficult to control the passage of the amorphous ribbon.

また、本出願人は、特許文献７にて、非晶質薄帯の磁気特性の改善を図る方法として、溶融金属の融点から１５０℃以上３２０℃以下の温度範囲までは、少なくとも１０3℃／sec以上の平均冷却速度で冷却し、非晶質薄帯の温度が１５０℃以上３２０℃以下、好ましくは２００℃以上２５０℃以下の範囲になった時に、冷却ロールから非晶質薄帯を剥離して巻き取る方法を提案した。 In addition, as a method for improving the magnetic properties of an amorphous ribbon in Japanese Patent Application Laid-Open No. 2005-228620, the applicant of the present invention is at least 10 3 ° C / temperature from the melting point of the molten metal to a temperature range of 150 ° C to 320 ° C. When cooling at an average cooling rate of sec or more and the temperature of the amorphous ribbon is in the range of 150 ° C. to 320 ° C., preferably 200 ° C. to 250 ° C., the amorphous ribbon is peeled off from the cooling roll. And proposed a method of winding.

しかし、上記方法は、冷却速度が大きすぎる場合には、非晶質薄帯に、過冷却に起因する歪を与え、磁気特性を悪化させる。   However, when the cooling rate is too high, the above method imparts distortion due to supercooling to the amorphous ribbon and deteriorates the magnetic properties.

特開昭５５−３３８１６号公報JP 55-33816 A 特開昭５６−１２６０５２号公報Japanese Patent Laid-Open No. 56-126052 特開昭５６−１６０８５９号公報Japanese Patent Laid-Open No. 56-160859 特開昭５８−１７６０６１号公報Japanese Patent Laid-Open No. 58-176061 特開平８−２１５８１７号公報JP-A-8-215817 特開２００２−３６１３７５号公報JP 2002-361375 A 特開平１０−２７７７１０号公報JP-A-10-277710

本発明は、上記課題の解決を図るため、二次的冷却手段を用いずに、所要の熱伝導率及び肉厚を有する冷却ロールを用い、急冷凝固後の非晶質薄帯の冷却において、非晶質薄帯と冷却ロールとの接触長さを適正化することにより、適正な冷却パターン及び冷却速度を確保し、磁気特性に優れた鉄系非晶質薄帯を製造する方法と装置を提供することを目的とする。   In order to solve the above problems, the present invention uses a cooling roll having a required thermal conductivity and thickness without using a secondary cooling means, and in cooling an amorphous ribbon after rapid solidification, By optimizing the contact length between the amorphous ribbon and the cooling roll, a method and an apparatus for producing an iron-based amorphous ribbon excellent in magnetic properties while ensuring an appropriate cooling pattern and cooling rate The purpose is to provide.

本発明者は、二次的冷却手段による薄帯冷却制御や、薄帯を巻き取る直前の薄帯温度制御が、優れた磁気特性の確保の点で必ずしも奏効しないことに鑑み、二次的冷却手段を用いずに、磁気特性の劣化を生じさせることなく非晶質薄帯を冷却する方法及び装置について鋭意研究した。   In view of the fact that the ribbon cooling control by the secondary cooling means and the ribbon temperature control just before winding the ribbon are not always effective in securing excellent magnetic properties, We have intensively studied a method and an apparatus for cooling an amorphous ribbon without using any means and without causing deterioration of magnetic properties.

その結果、本発明者は、特定の熱伝導率で、かつ、所要のロール肉厚を有する冷却ロールを用い、非晶質薄帯と冷却ロールとの接触長さを所定の長さ以上に制御すれば、（ｉ）鉄系非晶質薄帯の磁気特性が良好となる冷却パターンを形成することができ、その結果、（ii）磁気特性に優れた鉄系非晶質薄帯を製造することができることを見出した。   As a result, the present inventor uses a cooling roll having a specific heat conductivity and a required roll thickness, and controls the contact length between the amorphous ribbon and the cooling roll to a predetermined length or more. Then, (i) it is possible to form a cooling pattern in which the magnetic properties of the iron-based amorphous ribbon are good, and as a result, (ii) producing an iron-based amorphous ribbon with excellent magnetic properties. I found that I can do it.

本発明は、上記知見に基づいてなされたもので、その要旨は以下のとおりである。   This invention was made | formed based on the said knowledge, and the summary is as follows.

（１） 鉄系溶融金属を高速回転中の冷却ロールの表面で急冷凝固させて非晶質薄帯を製造する方法において
(a)熱伝導率λが８０Ｗ／（ｍ・Ｋ）≦λ≦２６０Ｗ／（ｍ・Ｋ）で、かつ、ロール肉 厚ｄが５ｍｍ≦ｄ≦２５ｍｍの冷却ロールを用い、
(b)鉄系溶融金属が凝固し非晶質薄帯が形成される凝固開始点から、該薄帯が冷却ロー ルから剥離するまでの間の、上記薄帯と冷却ロールとの接触長さＬzを、
Ｒ／４≦Ｌz（Ｒは冷却ロールの直径）
に制御する
ことを特徴とする鉄系非晶質薄帯の製造方法。 (1) In a method for producing an amorphous ribbon by rapidly solidifying an iron-based molten metal on the surface of a cooling roll rotating at high speed
(a) Using a cooling roll having a thermal conductivity λ of 80 W / (m · K) ≦ λ ≦ 260 W / (m · K) and a roll thickness d of 5 mm ≦ d ≦ 25 mm,
(b) Contact length between the ribbon and the cooling roll from the solidification start point at which the iron-based molten metal solidifies to form an amorphous ribbon until the ribbon strips from the cooling roll. Lz
R / 4 ≦ Lz (R is the diameter of the cooling roll)
A method for producing an iron-based amorphous ribbon, characterized by being controlled.

（２） 前記冷却ロールが、直径８００ｍｍ以上、１５００ｍｍ以下の冷却ロールであることを特徴とする前記（１）に記載の磁気特性に優れた鉄系非晶質薄帯の製造方法。   (2) The method for producing an iron-based amorphous ribbon having excellent magnetic properties according to (1), wherein the cooling roll is a cooling roll having a diameter of 800 mm or more and 1500 mm or less.

（３） 前記冷却ロールが、内部水冷構造の冷却ロールであることを特徴とする前記（１）又は（２）に記載の磁気特性に優れた鉄系非晶質薄帯の製造方法。   (3) The method for producing an iron-based amorphous ribbon according to (1) or (2), wherein the cooling roll is a cooling roll having an internal water cooling structure.

（４） 前記急冷凝固の後、凝固点温度から２５０℃までを、平均冷却速度３．０×１０3〜６．０×１０4℃／secで冷却することを特徴とする前記（１）〜（３）のいずれかに記載の磁気特性に優れた鉄系非晶質薄帯の製造方法。 (4) After the rapid solidification, cooling from the freezing point temperature to 250 ° C. is performed at an average cooling rate of 3.0 × 10 3 to 6.0 × 10 4 ° C./sec. 3) A method for producing an iron-based amorphous ribbon having excellent magnetic properties according to any one of 3).

（５） 前記剥離直後の鉄系非晶質薄帯の温度が、１００℃以上、２５０℃以下であることを特徴とする前記（１）〜（４）のいずれかに記載の磁気特性に優れた鉄系非晶質薄帯の製造方法。   (5) The temperature of the iron-based amorphous ribbon immediately after the peeling is 100 ° C. or higher and 250 ° C. or lower, and is excellent in magnetic properties according to any one of (1) to (4) A method for producing an iron-based amorphous ribbon.

（６） 鉄系溶融金属を高速回転中の冷却ロールの表面で急冷凝固させて非晶質薄帯を製造する装置において、
(a)熱伝導率λが８０Ｗ／（ｍ・Ｋ）≦λ≦２６０Ｗ／（ｍ・Ｋ）で、かつ、ロール肉 厚ｄが５ｍｍ≦ｄ≦２５ｍｍの冷却ロール、及び、
(b)鉄系溶融金属が凝固し非晶質薄帯が形成される凝固開始点から、該薄帯が冷却ロー ルから剥離するまでの間の、上記薄帯と冷却ロールとの接触長さＬzを
Ｒ／４≦Ｌz（Ｒは冷却ロールの直径）
に制御する制御装置
を備えることを特徴とする磁気特性に優れた鉄系非晶質薄帯の製造装置。 (6) In an apparatus for producing an amorphous ribbon by rapidly solidifying an iron-based molten metal on the surface of a cooling roll rotating at high speed,
(a) a cooling roll having a thermal conductivity λ of 80 W / (m · K) ≦ λ ≦ 260 W / (m · K) and a roll thickness d of 5 mm ≦ d ≦ 25 mm; and
(b) Contact length between the ribbon and the cooling roll from the solidification start point at which the iron-based molten metal solidifies to form an amorphous ribbon until the ribbon strips from the cooling roll. Lz R / 4 ≦ Lz (R is the diameter of the cooling roll)
An apparatus for producing an iron-based amorphous ribbon having excellent magnetic properties, characterized in that a control device for controlling the iron-based material is provided.

（７） 前記冷却ロールが、直径８００ｍｍ以上、１５００ｍｍ以下の冷却ロールであることを特徴とする前記（６）に記載の磁気特性に優れた鉄系非晶質薄帯の製造装置。   (7) The apparatus for producing an iron-based amorphous ribbon according to (6), wherein the cooling roll is a cooling roll having a diameter of 800 mm or more and 1500 mm or less.

（８） 前記冷却ロールが、内部水冷構造の冷却ロールであることを特徴とする前記（６）又は（７）に記載の磁気特性に優れた鉄系非晶質薄帯の製造装置。   (8) The apparatus for producing an iron-based amorphous ribbon according to (6) or (7), wherein the cooling roll is a cooling roll having an internal water cooling structure.

本発明によれば、特定の熱伝導率で、かつ、所要のロール肉厚を有する冷却ロールを用い、鉄系非晶質薄帯と冷却ロールとの接触長さを所定の長さ以上に制御すれば、二次的冷却手段を必要とせずに、磁気特性に優れた非晶質薄帯を製造することができる。したがって、本発明は、設備コストの低減、製造歩留まりの向上、生産性の向上等を達成し、前記課題を解決するものである。   According to the present invention, a cooling roll having a specific heat conductivity and a required roll thickness is used, and the contact length between the iron-based amorphous ribbon and the cooling roll is controlled to a predetermined length or more. In this case, an amorphous ribbon having excellent magnetic properties can be produced without requiring a secondary cooling means. Therefore, the present invention achieves the reduction of the equipment cost, the improvement of the manufacturing yield, the improvement of the productivity, and the like, and solves the above problems.

本発明について、図面に基づいて説明する。図１に、単ロール法による本発明の一態様を示す。   The present invention will be described with reference to the drawings. FIG. 1 shows one embodiment of the present invention by a single roll method.

図１に示す単ロール法では、冷却ロール２の円周面に近接して、鉄系溶融金属を収容するタンディッシュ３に接合されたノズル４を配置し、ノズル４から、鉄系溶融金属を、高速回転している冷却ロール２の周面に噴出して、急冷凝固させ、所定厚さの鉄系非晶質薄帯１を連続的に製造する。   In the single roll method shown in FIG. 1, a nozzle 4 joined to a tundish 3 containing iron-based molten metal is disposed in the vicinity of the circumferential surface of the cooling roll 2, and the iron-based molten metal is removed from the nozzle 4. The iron-based amorphous ribbon 1 having a predetermined thickness is continuously produced by jetting it onto the peripheral surface of the cooling roll 2 rotating at high speed and rapidly solidifying it.

鉄系非晶質薄帯１は、巻取装置５で連続的に巻き取られるが、この時、鉄系非晶質薄帯を、冷却ロール２の円周面の剥離点Ｚ、即ち、急冷凝固後の鉄系非晶質薄帯１と冷却ロール２との接触長さＬz（ノズル４の位置から剥離点Ｚまでの冷却ロール円弧長さ）を、下記式を満たすように制御する。
Ｒ／４≦Ｌz（Ｒは冷却ロールの直径） The iron-based amorphous ribbon 1 is continuously wound up by the winding device 5. At this time, the iron-based amorphous ribbon is separated from the peeling point Z of the circumferential surface of the cooling roll 2, that is, rapidly cooled. The contact length Lz between the iron-based amorphous ribbon 1 and the cooling roll 2 after solidification (the cooling roll arc length from the position of the nozzle 4 to the peeling point Z) is controlled to satisfy the following formula.
R / 4 ≦ Lz (R is the diameter of the cooling roll)

本発明においては、（ｉ）熱伝導率λが８０Ｗ／（ｍ・Ｋ）≦λ≦２６０Ｗ／（ｍ・Ｋ）で、かつ、ロール肉厚ｄが５ｍｍ≦ｄ≦２５ｍｍの冷却ロールを用いる点、及び、該冷却ロールの採用と関連して、（ii）非晶質薄帯と冷却ロールとの接触長さＬzを、上記式に従って設定する点が特徴である。   In the present invention, (i) a cooling roll having a thermal conductivity λ of 80 W / (m · K) ≦ λ ≦ 260 W / (m · K) and a roll thickness d of 5 mm ≦ d ≦ 25 mm is used. In connection with the use of the cooling roll, (ii) the contact length Lz between the amorphous ribbon and the cooling roll is set according to the above formula.

本発明においては、上記特徴点が相俟って、鉄系非晶質帯において優れた磁気特性を確保することができる。   In the present invention, the above feature points can be combined to ensure excellent magnetic properties in the iron-based amorphous band.

上記冷却ロールとして、好ましくは、直径８００ｍｍ以上、１５００ｍｍ以下の内部水冷構造の冷却ロール、更に好ましくは、１０００ｍｍ以上、１５００ｍｍ以下の内部水冷構造の冷却ロールを用いると、鉄系非晶質帯の磁気特性がより優れたものとなる。   As the cooling roll, preferably, a cooling roll having an internal water cooling structure with a diameter of 800 mm or more and 1500 mm or less, and more preferably a cooling roll having an internal water cooling structure of 1000 mm or more and 1500 mm or less is used. The characteristics are better.

以下に、上記特徴点が相俟って、鉄系非晶質帯の磁気特性が向上する理由について説明する。   The reason why the magnetic characteristics of the iron-based amorphous band are improved in combination with the above feature points will be described below.

図３に、温度Ｔ2の鉄系溶融金属を冷却ロール上で急冷凝固せしめ、温度Ｔ1まで冷却した時の鉄系非晶質薄帯の冷却曲線Ｃzを模式的に示す。   FIG. 3 schematically shows a cooling curve Cz of the iron-based amorphous ribbon when the iron-based molten metal at the temperature T2 is rapidly solidified on the cooling roll and cooled to the temperature T1.

冷却曲線Ｃzが図中のＡ領域にあれば、冷却速度が速いので、鉄系溶融金属は非晶質化し易いが、一方で、冷却過程で急冷却状態となり、鉄系非晶質薄帯に冷却による残留応力が入り、磁気特性が劣化する。したがって、冷却後の鉄系非晶質薄帯において、優れた磁気特性を確保するためには、冷却曲線Ｃzを上限臨界冷却曲線Ｃaより上に維持する必要がある。   If the cooling curve Cz is in the region A in the figure, since the cooling rate is fast, the iron-based molten metal is likely to become amorphous, but on the other hand, it becomes rapidly cooled during the cooling process, and becomes an iron-based amorphous ribbon. Residual stress due to cooling enters and magnetic properties deteriorate. Therefore, in order to ensure excellent magnetic properties in the iron-based amorphous ribbon after cooling, it is necessary to maintain the cooling curve Cz above the upper critical cooling curve Ca.

また、冷却曲線Ｃzが図中のＢ領域にあれば、緩冷却状態となり、鉄系溶融金属が完全に非晶質とならず、一部結晶質となる。非晶質状態の中に結晶質が混在すると、磁気特性が劣化するばかりでなく、脆性等の機械特性も劣化する。したがって、冷却後の鉄系非晶質薄帯において、優れた磁気特性を確保するには、冷却曲線Ｃzを、下限臨界冷却曲線Ｃbより下に維持する必要がある。   Further, if the cooling curve Cz is in the region B in the figure, the state is a slow cooling state, and the iron-based molten metal is not completely amorphous but partially crystalline. When a crystalline substance is mixed in an amorphous state, not only the magnetic properties are deteriorated but also mechanical properties such as brittleness are deteriorated. Therefore, in order to ensure excellent magnetic properties in the iron-based amorphous ribbon after cooling, it is necessary to maintain the cooling curve Cz below the lower critical cooling curve Cb.

結局、優れた磁気特性を確保するためには、冷却曲線Ｃzを、上限臨界冷却曲線Ｃaと下限臨界冷却曲線Ｃbの間に維持しなければならない。   Eventually, in order to ensure excellent magnetic properties, the cooling curve Cz must be maintained between the upper critical cooling curve Ca and the lower critical cooling curve Cb.

さらに、優れた磁気特性を確保し、その磁気特性劣化を防止するためには、上記冷却曲線を、上限臨界冷却曲線Ｃａと下限臨界冷却曲線Ｃｂの間に維持した上で、冷却ロールから剥離した直後の鉄系非晶質薄帯の温度を、所定の温度範囲とする必要がある。   Furthermore, in order to ensure excellent magnetic properties and prevent deterioration of the magnetic properties, the cooling curve is maintained between the upper critical cooling curve Ca and the lower critical cooling curve Cb, and then peeled from the cooling roll. It is necessary to set the temperature of the iron-based amorphous ribbon immediately after that to a predetermined temperature range.

冷却曲線が適正範囲にあったとしても、剥離直後の鉄系非晶質薄帯の温度が、図３に示す上限臨界温度Ｔ0Hよりも高い温度となった場合は、冷却曲線が領域Ｃ（自己焼鈍領域）の範囲に入り、非晶質薄帯は自己焼鈍により特性が劣化する。 Even if the cooling curve is in an appropriate range, when the temperature of the iron-based amorphous ribbon immediately after peeling becomes higher than the upper critical temperature T 0H shown in FIG. The properties of the amorphous ribbon are deteriorated by self-annealing.

一方、剥離直後の非晶質薄帯の温度が、下限臨界温度Ｔ0Lより低い場合は、図中の領域Ａ（急冷却領域）を通過することになり、残留応力により磁気特性が劣化する。 On the other hand, when the temperature of the amorphous ribbon immediately after peeling is lower than the lower critical temperature T 0L, it passes through the region A (rapid cooling region) in the figure, and the magnetic characteristics deteriorate due to residual stress.

冷却ロールと冷却曲線及び剥離直後の温度の関係は一義的に決まらないので、本発明者は、冷却ロールの熱伝導率、冷却ロールの肉厚、非晶質薄帯の厚さ、冷却ロールの周速、接触長さ、鉄系溶融金属を冷却ロールに噴出する温度等を種々変えた実験を行い、製造条件と鉄系非晶質薄帯の磁気特性との関係を調査、解析した。   Since the relationship between the cooling roll, the cooling curve, and the temperature immediately after peeling is not uniquely determined, the present inventors have determined that the thermal conductivity of the cooling roll, the thickness of the cooling roll, the thickness of the amorphous ribbon, the thickness of the cooling roll, Experiments were performed with various changes in peripheral speed, contact length, temperature at which iron-based molten metal was ejected onto the cooling roll, and the relationship between the manufacturing conditions and the magnetic properties of the iron-based amorphous ribbon was investigated and analyzed.

その結果、本発明者は、熱伝導が８０Ｗ／（ｍ・Ｋ）≦λ≦２６０Ｗ／（ｍ・Ｋ）で、かつ、ロール肉厚ｄが５ｍｍ≦ｄ≦２５ｍｍの冷却ロールを用いた場合、好ましくは、該肉厚で内部水冷構造の冷却ロールを用いた場合、非晶質薄帯の板厚、冷却ロールの速度、鉄系溶融金属を冷却ロールの噴出する温度等にかかわらず、非晶質帯において、良好な磁気特性を確保できることが判明した。   As a result, the inventor used a cooling roll having a heat conduction of 80 W / (m · K) ≦ λ ≦ 260 W / (m · K) and a roll thickness d of 5 mm ≦ d ≦ 25 mm. Preferably, when a cooling roll having the wall thickness and an internal water cooling structure is used, an amorphous ribbon regardless of the thickness of the amorphous ribbon, the speed of the cooling roll, the temperature at which the iron-based molten metal is ejected from the cooling roll, etc. It was found that good magnetic properties can be secured in the zonal zone.

さらに、上記関係を詳細に整理、解析した結果、前述の上限臨界冷却曲線Ｃaと下限臨界冷却曲線Ｃbの範囲は、急冷凝固の後、凝固点温度から２５０℃までの平均冷却速度として、３．０×１０3〜６．０×１０4℃／ｓｅｃの範囲であること、さらに、前記剥離直後の鉄系非晶質薄帯の温度が１００℃以上、２５０℃以下の場合、良好な磁気特性に加え、良好な機械特性を示すことを見出した。 Furthermore, as a result of organizing and analyzing the above relationship in detail, the range of the above-mentioned upper critical cooling curve Ca and lower critical cooling curve Cb is 3.0 as an average cooling rate from the freezing point temperature to 250 ° C. after rapid solidification. When the temperature is in the range of × 10 3 to 6.0 × 10 4 ° C / sec and the temperature of the iron-based amorphous ribbon immediately after peeling is 100 ° C or higher and 250 ° C or lower, good magnetic properties are obtained. In addition, it has been found that it exhibits good mechanical properties.

次に、上記範囲の熱熱伝導率を有する冷却ロールの採用に関連して、鉄系非晶質薄帯と冷却ロールとの接触長さＬzを、Ｒ／４≦Ｌz（Ｒは冷却ロールの直径）とする点について、図３に基づいて説明する。   Next, in connection with the adoption of the cooling roll having the thermal thermal conductivity in the above range, the contact length Lz between the iron-based amorphous ribbon and the cooling roll is set to R / 4 ≦ Lz (R is the cooling roll). The point of (diameter) will be described with reference to FIG.

鉄系非晶質薄帯は、冷却ロールと接触して接触長さＬz分回転して移動する間に、冷却曲線Ｃzに従い温度Ｔ1まで冷却され、その後、冷却ロールの円周面から剥離されて巻き取られる。   The iron-based amorphous ribbon is cooled to the temperature T1 according to the cooling curve Cz while moving in contact with the cooling roll by the contact length Lz, and then peeled off from the circumferential surface of the cooling roll. It is wound up.

前述したように、冷却ロール上で所定の冷却パターンで冷却して形成した磁気特性、機械特性とも良好な非晶質薄帯において、巻き取り後も、これら良好な特性を維持するためには、鉄系非晶質薄帯を冷却ロールの円周面から剥離した後、鉄系非晶質薄帯が、自己焼鈍を起こさないようにすることが必要である。   As described above, in the amorphous ribbon with good magnetic properties and mechanical properties formed by cooling with a predetermined cooling pattern on the cooling roll, in order to maintain these good properties even after winding, After peeling the iron-based amorphous ribbon from the circumferential surface of the cooling roll, it is necessary to prevent the iron-based amorphous ribbon from causing self-annealing.

鉄系非晶質薄帯では、剥離直後の温度が２５０℃超となった場合、巻き取りまでに、二次的冷却等により、２５０℃以下に冷却しなければ、巻き取り後の自己焼鈍により、特性劣化（特には、脆化による割れや破断等）が生じる。   In the case of iron-based amorphous ribbons, if the temperature immediately after peeling exceeds 250 ° C, secondary cooling or the like before winding will result in self-annealing after winding unless cooling to 250 ° C or lower. , Characteristic deterioration (particularly, cracking or fracture due to embrittlement) occurs.

二次的冷却装置を用いるとは、前述したように、設備コストが上昇するだけでなく、非晶質薄帯の通板制御も困難となるため、本発明者は、これに代わる方法や、装置を検討したが、結局、冷却ロールのみで二次的冷却機能も付与するという考えに至った。   As described above, using a secondary cooling device not only increases the equipment cost, but also makes it difficult to control the passage of the amorphous ribbon, the present inventor, Although the device was examined, it eventually came to the idea that a secondary cooling function is also provided only by the cooling roll.

つまり、冷却パターンを適正化するために、熱伝導率λが８０Ｗ／（ｍ・Ｋ）≦λ≦２６０Ｗ／（ｍ・Ｋ）で、かつ、ロール肉厚ｄが５ｍｍ≦ｄ≦２５ｍｍの冷却ロールを用い、好ましくは、該肉厚の内部水冷構造の冷却ロールを用い、さらに、鉄系非晶質薄帯と冷却ロールとの接触長さＬzを、二次的冷却機能が不要となるまでの冷却を確保できる接触長さとすることで、二次的冷却手段を用いることなく、鉄系非晶質薄帯の剥離直後の温度を２５０℃以下とすることができる可能性を見出した。   That is, in order to optimize the cooling pattern, a cooling roll having a thermal conductivity λ of 80 W / (m · K) ≦ λ ≦ 260 W / (m · K) and a roll thickness d of 5 mm ≦ d ≦ 25 mm. Preferably, the thick internal water-cooled cooling roll is used, and further, the contact length Lz between the iron-based amorphous ribbon and the cooling roll is set until the secondary cooling function becomes unnecessary. It has been found that by setting the contact length to ensure cooling, the temperature immediately after peeling of the iron-based amorphous ribbon can be made 250 ° C. or less without using a secondary cooling means.

そこで、本発明者は、前述の実験結果において、鉄系非晶質薄帯と冷却ロールとの接触長さと、剥離直後の温度の観点から整理を行い、接触製造条件と鉄系非晶質薄帯の磁気特性及び機械特性との関係を詳細に解析した。   Therefore, the present inventor made arrangements from the viewpoint of the contact length between the iron-based amorphous ribbon and the cooling roll and the temperature immediately after peeling in the above-described experimental results, and the contact manufacturing conditions and the iron-based amorphous thin film. The relationship between the magnetic properties and mechanical properties of the belt was analyzed in detail.

その結果、鉄系非晶質薄帯と冷却ロールとの接触長さＬzを、Ｒ／４≦Ｌz（Ｒは冷却ロールの直径）とすることで、二次的冷却手段を用いることなく、非晶質薄帯の板厚、冷却ロールの速度、鉄系溶融金属を冷却ロールの噴出する温度等にかかわらず、鉄系非晶質薄帯の剥離直後の温度を２５０℃以下にできることが判明した。   As a result, the contact length Lz between the iron-based amorphous ribbon and the chill roll is set to R / 4 ≦ Lz (R is the diameter of the chill roll). It has been found that the temperature immediately after exfoliation of the iron-based amorphous ribbon can be made 250 ° C. or less regardless of the thickness of the crystalline ribbon, the speed of the cooling roll, the temperature at which the iron-based molten metal is ejected from the cooling roll, etc. .

また、熱伝導率λが８０Ｗ／（ｍ・Ｋ）≦λ≦２６０Ｗ／（ｍ・Ｋ）で、かつ、ロール肉厚ｄが５ｍｍ≦ｄ≦２５ｍｍの冷却ロールを用いることにより、下限臨界冷却速度〜上限臨界冷却速度の範囲が、３．０×１０3〜６．０×１０4℃／secで維持され、かつ、鉄系非晶質薄帯の剥離直後温度が１００℃以上となり、その結果、良好な磁気特性を維持することができることが判明した。 Further, by using a cooling roll having a thermal conductivity λ of 80 W / (m · K) ≦ λ ≦ 260 W / (m · K) and a roll thickness d of 5 mm ≦ d ≦ 25 mm, the lower limit critical cooling rate is obtained. The range of the upper critical cooling rate is maintained at 3.0 × 10 3 to 6.0 × 10 4 ° C./sec, and the temperature immediately after exfoliation of the iron-based amorphous ribbon becomes 100 ° C. or higher. It was found that good magnetic properties can be maintained.

製造時間が長い場合には、非晶質薄帯の製造進行に伴い、冷却ロールが溶融金属により加熱されるので、安定した特性を得るためには、冷却ロールの温度を一定とすることができる内部水冷構造の冷却ロールを用いることが好ましい。   When the production time is long, the cooling roll is heated by the molten metal as the amorphous ribbon is produced. Therefore, in order to obtain stable characteristics, the temperature of the cooling roll can be constant. It is preferable to use a cooling roll having an internal water cooling structure.

冷却ロールの直径が小さいと、物理的に接触長さＬzが短くなり、冷却ロール周速等の条件によっては、冷却速度が小さくなり、冷却曲線を、磁気特性が良好となる温度領域内に制御することが難しくなるので、冷却ロールの直径は、８００ｍｍ以上とすることが好ましく、さらに、１０００ｍｍ以上とすることが好ましい。   When the diameter of the cooling roll is small, the contact length Lz is physically shortened, and depending on conditions such as the cooling roll peripheral speed, the cooling speed is reduced, and the cooling curve is controlled within the temperature range where the magnetic characteristics are good. Therefore, the diameter of the cooling roll is preferably 800 mm or more, and more preferably 1000 mm or more.

また、冷却ロールの直径が大きくなると、冷却速度や、剥離直後温度の制御幅が広がるが、冷却ロールの素材として一般に銅合金を使用しているため、冷却ロールの直径が大きくなればなるほど高価となり、実用的ではない。冷却速度や、剥離直後温度の制御において充分な余裕をもち、かつ、冷却ロールの価格を抑制するためには、１５００ｍｍ以下の冷却ロールが好ましい。   Also, as the diameter of the cooling roll increases, the cooling rate and the control range of the temperature immediately after peeling increase, but since copper alloy is generally used as the material of the cooling roll, it becomes more expensive as the diameter of the cooling roll increases. Not practical. In order to have a sufficient margin in controlling the cooling rate and the temperature immediately after peeling, and to suppress the price of the cooling roll, a cooling roll of 1500 mm or less is preferable.

非晶質薄帯を巻き取る場合、巻取ロールを、例えば、図１のように、冷却ロールを挟んで、ノズル４と対角の位置に設置すると、非晶質薄帯の巻き太りにより接触長さＬzが変動した場合でも、冷却ロールのみで二次的冷却機能を維持することが可能となり、設備上の制約が生じない。   When winding the amorphous ribbon, if the winding roll is placed at a position diagonally opposite the nozzle 4 with the cooling roll sandwiched between them, for example, as shown in FIG. Even when the length Lz fluctuates, it is possible to maintain the secondary cooling function with only the cooling roll, and there is no restriction on the facility.

図２に、タンディッシュ３が冷却ロール２の頂上に配置されている別の態様を示すが、基本的には、図１に示す態様と同じである。なお、Ｌzは、冷却ロールの周長の１／２を超えてもよい。   FIG. 2 shows another mode in which the tundish 3 is arranged on the top of the cooling roll 2, but it is basically the same as the mode shown in FIG. Note that Lz may exceed 1/2 of the circumferential length of the cooling roll.

鉄系溶融金属としては、Ｆｅを主成分とし、他に、Ｓｉ、Ｂ、Ｃ、の少なくとも１種又は２種以上、Ｐ、Ｓ、Ｍｎ、Ｎｉ、Ｃｕ、Ｃｒの少なくとも１種又は２種以上、及び、不可避的不純物を含むものが知られているが、本発明では、熱伝導率λが８０Ｗ／（ｍ・Ｋ）≦λ≦２６０Ｗ／（ｍ・Ｋ）で、かつ、ロール肉厚ｄが５ｍｍ≦ｄ≦２５ｍｍの冷却ロールを用い、非晶質帯と冷却ロールとの接触長さＬzを、Ｒ／４≦Ｌz（Ｒは冷却ロールの直径）に維持する限り、凝固組織を非晶質化できるので、上記組成の鉄系溶融金属であれば特に問題は発生しない。   As the iron-based molten metal, Fe is the main component, and in addition, at least one or more of Si, B, and C, at least one or more of P, S, Mn, Ni, Cu, and Cr In the present invention, the thermal conductivity λ is 80 W / (m · K) ≦ λ ≦ 260 W / (m · K), and the roll thickness d Is used as long as the contact length Lz between the amorphous belt and the cooling roll is maintained at R / 4 ≦ Lz (R is the diameter of the cooling roll). Since it can be refined, there is no particular problem if it is an iron-based molten metal having the above composition.

次に、本発明の実施例について説明するが、本実施例の条件は、本発明の実施可能性及び効果を確認するために採用した一条件例であり、本発明はこの一条件例に限定されるものではない。本発明は、本発明の要旨を逸脱せず、本発明の目的を達成する限りにおいて、種々の条件を採用し得るものである。   Next, an embodiment of the present invention will be described. The conditions of the present embodiment are one example of conditions adopted for confirming the feasibility and effect of the present invention, and the present invention is limited to this one example of conditions. Is not to be done. The present invention can adopt various conditions as long as the object of the present invention is achieved without departing from the gist of the present invention.

（実施例）
図１に示す態様の装置を用い、原子％で、Ｆｅ：８０．５％、Ｓｉ：６．５％、Ｂ：１２％、Ｃ：１％の鉄系溶融金属を、熱伝導率λが１２９Ｗ／（ｍ・Ｋ）、ロール肉厚ｄが１９ｍｍ、ロール直径１１９８ｍｍ、ロール幅２５０ｍｍの冷却ロールの表面に、１７０ｍｍ×０．８５ｍｍの矩形スリット状のノズル開口から噴出し、薄帯接触長さ（Ｌz）を変えて、急冷凝固させて鉄系非晶質薄帯を製造し、その磁気特性を測定した。 (Example)
Using the apparatus of the embodiment shown in FIG. 1, an iron-based molten metal of Fe: 80.5%, Si: 6.5%, B: 12%, and C: 1% in atomic percent is used, and the thermal conductivity λ is 129 W. / (M · K), a roll thickness d of 19 mm, a roll diameter of 1198 mm, a roll width of 250 mm, ejected from a 170 mm × 0.85 mm rectangular slit-shaped nozzle opening, and a ribbon contact length ( Lz) was changed and rapidly solidified to produce an iron-based amorphous ribbon, and its magnetic properties were measured.

測定した結果を表１に示す。他の条件として、表１に示すように、熱伝導率λが３５８Ｗ／（ｍ・Ｋ）、ロール肉厚ｄが１６ｍｍ、ロール直径１１９２ｍｍ、ロール幅２５０ｍｍの冷却ロールを用い、前述のノズルを用い、薄帯接触長さを変えて、急冷凝固させて鉄系非晶質薄帯を製造した。なお、鉄系溶融合金の温度は１３２０℃とした。   The measured results are shown in Table 1. As other conditions, as shown in Table 1, a cooling roll having a thermal conductivity λ of 358 W / (m · K), a roll thickness d of 16 mm, a roll diameter of 1192 mm, and a roll width of 250 mm was used, and the nozzles described above were used. The iron-based amorphous ribbon was manufactured by changing the contact length of the ribbon and rapidly solidifying it. The temperature of the iron-based molten alloy was 1320 ° C.

Figure 2007007714
Figure 2007007714

鉄系非晶質薄帯の剥離直後の温度測定は、図１に示すＹ点にて、低放射率測定型の非接触温度計にて行った。磁気特性の測定は、巻き取り後の鉄系非晶質薄帯を展開し３００ｍ毎にサンプルを採取し、３６０℃×１時間の熱処理後、ＳＳＴ（Single Sheet Tester）装置で鉄損（１.３Ｔ、５０Ｈｚ）を測定した。表１に示す値は、チャージ毎の全サンプルについての平均値である。   The temperature measurement immediately after peeling of the iron-based amorphous ribbon was performed with a non-contact thermometer of low emissivity measurement type at the point Y shown in FIG. The magnetic properties were measured by unrolling the iron-based amorphous ribbon after winding, taking a sample every 300 m, heat-treating at 360 ° C. for 1 hour, and then using an SST (Single Sheet Tester) device to measure iron loss (1. 3T, 50 Hz). The values shown in Table 1 are average values for all samples for each charge.

本発明例のＮｏ.１〜６は、いずれも、冷却ロールから剥離直後の鉄系非晶質合金の温度が１００〜２５０℃の間にあり、鉄損も０．１Ｗ／kg以下となっており、良好な磁気特性を有する鉄系非晶質薄帯が得られていることが解る。   As for No. 1-6 of this invention example, as for all, the temperature of the iron-type amorphous alloy immediately after peeling from a cooling roll is between 100-250 degreeC, and an iron loss also becomes 0.1 W / kg or less. Thus, it can be seen that an iron-based amorphous ribbon having good magnetic properties is obtained.

一方、比較例のＮｏ.７〜１２では、冷却速度が大きく、剥離直後の鉄系非晶質合金の温度がいずれも１００℃を下回り、残留応力が発生したため、鉄損が劣化し、０.１５Ｗ／kgを超えてしまっている。   On the other hand, in Comparative Examples Nos. 7 to 12, the cooling rate was high, the temperature of the iron-based amorphous alloy immediately after peeling was less than 100 ° C., and residual stress was generated. It has exceeded 15W / kg.

表１から、本発明例においては、優れた磁気特性を有する非晶質薄帯が得られていることが解る。   From Table 1, it can be seen that amorphous ribbons having excellent magnetic properties were obtained in the inventive examples.

前述したように、本発明によれば、特定の熱伝導率で、かつ、所要のロール肉厚を有する冷却ロールを用い、鉄系非晶質薄帯と冷却ロールとの接触長さを所定の長さ以上に制御すれば、二次的冷却手段を必要とせず、磁気特性に優れた非晶質薄帯を製造することができる。   As described above, according to the present invention, a cooling roll having a specific thermal conductivity and a required roll thickness is used, and the contact length between the iron-based amorphous ribbon and the cooling roll is set to a predetermined value. If the length is controlled to be longer than that, an amorphous ribbon having excellent magnetic properties can be produced without requiring a secondary cooling means.

したがって、本発明は、設備コストの低減、製造歩留まりの向上、生産性の向上を達成し、前記課題を解決するものである。よって、本発明は、産業上の利用可能性の高いものである。   Therefore, the present invention achieves a reduction in equipment cost, an improvement in manufacturing yield, and an improvement in productivity, and solves the above problems. Therefore, the present invention has high industrial applicability.

本発明の一態様を示す図である。FIG. 10 illustrates one embodiment of the present invention. 本発明の別の態様を示す図である。It is a figure which shows another aspect of this invention. 温度Ｔ2の鉄系溶融金属を冷却ロールで急冷凝固せしめ、温度Ｔ1まで冷却した時の鉄系非晶薄帯の冷却曲線を模式的に示す図である。It is a figure which shows typically the cooling curve of an iron-type amorphous ribbon when the iron-type molten metal of temperature T2 is rapidly solidified by the cooling roll, and it cools to temperature T1.

符号の説明Explanation of symbols

１ 鉄系非晶質薄帯
２ 冷却ロール
３ タンディッシュ
４ ノズル
５ 巻取ロール
Ｒz 接触長さ
Ｙ 剥離直後温度測定点
Ｚ 剥離点 1 Iron-based amorphous ribbon 2 Cooling roll 3 Tundish 4 Nozzle 5 Winding roll Rz Contact length Y Measurement point immediately after peeling Z Stripping point

Claims (8)

鉄系溶融金属を高速回転中の冷却ロールの表面で急冷凝固させて非晶質薄帯を製造する方法において
(a)熱伝導率λが８０Ｗ／（ｍ・Ｋ）≦λ≦２６０Ｗ／（ｍ・Ｋ）で、かつ、ロール肉 厚ｄが５ｍｍ≦ｄ≦２５ｍｍの冷却ロールを用い、
(b)鉄系溶融金属が凝固し非晶質薄帯が形成される凝固開始点から、該薄帯が冷却ロー ルから剥離するまでの間の、上記薄帯と冷却ロールとの接触長さＬzを、
Ｒ／４≦Ｌz（Ｒは冷却ロールの直径）
に制御する
ことを特徴とする磁気特性に優れた鉄系非晶質薄帯の製造方法。 In a method for producing amorphous ribbon by rapidly solidifying iron-based molten metal on the surface of a cooling roll rotating at high speed
(a) Using a cooling roll having a thermal conductivity λ of 80 W / (m · K) ≦ λ ≦ 260 W / (m · K) and a roll thickness d of 5 mm ≦ d ≦ 25 mm,
(b) Contact length between the ribbon and the cooling roll from the solidification start point at which the iron-based molten metal solidifies to form an amorphous ribbon until the ribbon strips from the cooling roll. Lz
R / 4 ≦ Lz (R is the diameter of the cooling roll)
A method for producing an iron-based amorphous ribbon having excellent magnetic properties, characterized in that the control is controlled to a minimum. 前記冷却ロールが、直径８００ｍｍ以上、１５００ｍｍ以下の冷却ロールであることを特徴とする請求項１に記載の磁気特性に優れた鉄系非晶質薄帯の製造方法。   The method for producing an iron-based amorphous ribbon according to claim 1, wherein the cooling roll is a cooling roll having a diameter of 800 mm or more and 1500 mm or less. 前記冷却ロールが、内部水冷構造の冷却ロールであることを特徴とする請求項１又は２に記載の磁気特性に優れた鉄系非晶質薄帯の製造方法。   The method for producing an iron-based amorphous ribbon according to claim 1 or 2, wherein the cooling roll is a cooling roll having an internal water cooling structure. 前記急冷凝固の後、凝固点温度から２５０℃までを、平均冷却速度３．０×１０3〜６．０×１０4℃／secで冷却することを特徴とする請求項項１〜３のいずれかに記載の磁気特性に優れた鉄系非晶質薄帯の製造方法。 The solidification point temperature to 250 ° C. is cooled at an average cooling rate of 3.0 × 10 3 to 6.0 × 10 4 ° C./sec after the rapid solidification. A method for producing an iron-based amorphous ribbon having excellent magnetic properties described in 1. 前記剥離直後の鉄系非晶質薄帯の温度が、１００℃以上、２５０℃以下であることを特徴とする請求項１〜４のいずれかに記載の磁気特性に優れた鉄系非晶質薄帯の製造方法。   The iron-based amorphous ribbon excellent in magnetic properties according to any one of claims 1 to 4, wherein the temperature of the iron-based amorphous ribbon immediately after peeling is 100 ° C or higher and 250 ° C or lower. A method of manufacturing a ribbon. 鉄系溶融金属を、高速回転中の冷却ロールの表面で急冷凝固させて非晶質薄帯を製造する装置において、
(a)熱伝導率λが８０Ｗ／（ｍ・Ｋ）≦λ≦２６０Ｗ／（ｍ・Ｋ）で、かつ、ロール肉 厚ｄが５ｍｍ≦ｄ≦２５ｍｍの冷却ロール、及び、
(b)鉄系溶融金属が凝固し非晶質薄帯が形成される凝固開始点から、該薄帯が冷却ロー ルから剥離するまでの間の、上記薄帯と冷却ロールとの接触長さＬzを
Ｒ／４≦Ｌｚ(Ｒは冷却ロールの直径)
に制御する制御装置
を備えることを特徴とする磁気特性に優れた鉄系非晶質薄帯の製造装置。 In an apparatus for producing an amorphous ribbon by rapidly solidifying an iron-based molten metal on the surface of a cooling roll rotating at high speed,
(a) a cooling roll having a thermal conductivity λ of 80 W / (m · K) ≦ λ ≦ 260 W / (m · K) and a roll thickness d of 5 mm ≦ d ≦ 25 mm; and
(b) Contact length between the ribbon and the cooling roll from the solidification start point at which the iron-based molten metal solidifies to form an amorphous ribbon until the ribbon strips from the cooling roll. Lz R / 4 ≦ Lz (R is the diameter of the cooling roll)
An apparatus for producing an iron-based amorphous ribbon having excellent magnetic properties, characterized in that a control device for controlling the iron-based material is provided. 前記冷却ロールが、直径８００ｍｍ以上、１５００ｍｍ以下の冷却ロールであることを特徴とする請求項６に記載の磁気特性に優れた鉄系非晶質薄帯の製造装置。   The apparatus for producing an iron-based amorphous ribbon having excellent magnetic properties according to claim 6, wherein the cooling roll is a cooling roll having a diameter of 800 mm or more and 1500 mm or less. 前記冷却ロールが、内部水冷構造の冷却ロールであることを特徴とする請求項６又は７に記載の磁気特性に優れた鉄系非晶質薄帯の製造装置。   8. The apparatus for producing an iron-based amorphous ribbon according to claim 6 or 7, wherein the cooling roll is a cooling roll having an internal water cooling structure.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015213920A (en) * 2014-05-08 2015-12-03 Ｎｅｃトーキン株式会社 Quickly-chilled alloy ribbon, production method thereof, and quickly-chilled alloy ribbon production apparatus
CN107127308A (en) * 2017-06-28 2017-09-05 青岛云路先进材料技术有限公司 A kind of amorphous band shaped device
JPWO2020066989A1 (en) * 2018-09-26 2021-09-24 日立金属株式会社 Method for manufacturing Fe-based nanocrystal alloy strip, method for manufacturing magnetic core, Fe-based nanocrystal alloy strip, and magnetic core

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0562813A (en) * 1991-08-29 1993-03-12 Tdk Corp Method of manufacturing permanent magnetic material
JPH0592240A (en) * 1991-06-19 1993-04-16 Kawasaki Steel Corp Method for introducing metallic strip
JPH06320241A (en) * 1993-05-11 1994-11-22 Nippon Steel Corp Production of porous thin strip
JPH08283919A (en) * 1995-04-11 1996-10-29 Nippon Steel Corp Iron-base amorphous alloy foil and its production
JPH0929399A (en) * 1995-07-14 1997-02-04 Takeshi Masumoto Manufacture of amorphous metallic thin wire
JP2002361375A (en) * 2001-03-28 2002-12-17 Nippon Steel Corp Manufacturing method for quick cooling solidification thin strip by single roll method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0592240A (en) * 1991-06-19 1993-04-16 Kawasaki Steel Corp Method for introducing metallic strip
JPH0562813A (en) * 1991-08-29 1993-03-12 Tdk Corp Method of manufacturing permanent magnetic material
JPH06320241A (en) * 1993-05-11 1994-11-22 Nippon Steel Corp Production of porous thin strip
JPH08283919A (en) * 1995-04-11 1996-10-29 Nippon Steel Corp Iron-base amorphous alloy foil and its production
JPH0929399A (en) * 1995-07-14 1997-02-04 Takeshi Masumoto Manufacture of amorphous metallic thin wire
JP2002361375A (en) * 2001-03-28 2002-12-17 Nippon Steel Corp Manufacturing method for quick cooling solidification thin strip by single roll method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015213920A (en) * 2014-05-08 2015-12-03 Ｎｅｃトーキン株式会社 Quickly-chilled alloy ribbon, production method thereof, and quickly-chilled alloy ribbon production apparatus
CN107127308A (en) * 2017-06-28 2017-09-05 青岛云路先进材料技术有限公司 A kind of amorphous band shaped device
JPWO2020066989A1 (en) * 2018-09-26 2021-09-24 日立金属株式会社 Method for manufacturing Fe-based nanocrystal alloy strip, method for manufacturing magnetic core, Fe-based nanocrystal alloy strip, and magnetic core

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