JP2001254124A - Method of producing high silicon steel excellent in surface property and workability - Google Patents
Method of producing high silicon steel excellent in surface property and workabilityInfo
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- JP2001254124A JP2001254124A JP2000064264A JP2000064264A JP2001254124A JP 2001254124 A JP2001254124 A JP 2001254124A JP 2000064264 A JP2000064264 A JP 2000064264A JP 2000064264 A JP2000064264 A JP 2000064264A JP 2001254124 A JP2001254124 A JP 2001254124A
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- silicon steel
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、浸珪処理法による
高けい素鋼板の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a high silicon steel sheet by a siliconizing treatment method.
【０００２】[0002]
【従来の技術】トランスやモ−タ等の電気機器用鉄心材
料として広く用いられるけい素鋼板には、通常、集合組
織制御および固有抵抗増大のためにSiが添加される。こ
のけい素鋼板の軟磁気特性はSiの添加量と共に向上し、
特に6.5％付近で最高の透磁率を示すことが知られてい
る。また、高けい素鋼板と呼ばれるSi含有量が約4％超
のけい素鋼板は、電気抵抗が高いため特に高周波領域で
の磁気特性が優れる。2. Description of the Related Art Silicon steel sheets, which are widely used as core materials for electrical equipment such as transformers and motors, are usually added with Si for controlling texture and increasing specific resistance. The soft magnetic properties of this silicon steel sheet improve with the addition amount of Si,
In particular, it is known to exhibit the highest magnetic permeability around 6.5%. A silicon steel sheet having a Si content of more than about 4%, which is called a high silicon steel sheet, has high electric resistance and thus has excellent magnetic properties particularly in a high frequency range.
【０００３】高けい素鋼板を工業的に製造する方法とし
て浸珪処理法が知られている。この製造方法（例えば、
特公平5-49745号公報等に示される製造技術）は、工業
的プロセスで圧延が可能なSi:4％以下の薄鋼板と四塩化
けい素とを高温で反応させることによりSiを浸透させ、
浸透したSiを板厚方向に拡散させることにより高けい素
鋼板を得る方法であり、例えば特公平5-49745号公報で
は、鋼板を四塩化けい素が5〜35vol％含まれる無酸化性
ガス雰囲気中において1023〜1200℃の温度で連続的に浸
珪処理し、コイル状の高けい素鋼板を得ている。通常、
この浸珪処理ではSi供給用の原料ガスとして四塩化けい
素が使用され、この四塩化けい素は以下に示す浸珪反応
式により鋼板と反応してSi富化層が鋼板表層に生成す
る。 SiCl4 + 5Fe → Fe3Si + 2FeCl2 [0003] As a method for industrially producing high silicon steel sheets, a siliconizing treatment method is known. This manufacturing method (for example,
The manufacturing technology disclosed in Japanese Patent Publication No. H5-49745) is a technology that allows a steel sheet that is rollable by an industrial process: Si: 4% or less to react with silicon tetrachloride at a high temperature to infiltrate Si,
This is a method of obtaining a high silicon steel sheet by diffusing infiltrated Si in the thickness direction. For example, in Japanese Patent Publication No. Hei 5-49745, a steel sheet is formed in a non-oxidizing gas atmosphere containing 5 to 35 vol% of silicon tetrachloride. The inside is continuously siliconized at a temperature of 1023 to 1200 ° C. to obtain a coiled high silicon steel sheet. Normal,
In this siliconizing treatment, silicon tetrachloride is used as a raw material gas for supplying Si, and this silicon tetrachloride reacts with the steel sheet by the following siliconizing reaction formula to form a Si-enriched layer on the surface layer of the steel sheet. SiCl 4 + 5Fe → Fe 3 Si + 2FeCl 2
【０００４】このようにして鋼板表層に生成したSi富化
層中のSiは、四塩化けい素を含まない無酸化性雰囲気中
で鋼板を均熱処理することにより板厚方向に拡散され
る。[0004] The Si in the Si-enriched layer formed on the surface of the steel sheet in this manner is diffused in the thickness direction by soaking the steel sheet in a non-oxidizing atmosphere containing no silicon tetrachloride.
【０００５】この時、浸珪処理する際にピックアップと
いわれる凸状の表面欠陥が発生し、鋼帯の表面性状及び
加工性を著しく劣化させる。従来、このピックアップの
発生要因は浸珪雰囲気中の酸素と四塩化けい素が含まれ
る無酸化性ガスとの反応により生成する「シリカ」と考
えられており、この問題に対し、酸素を低減されるとい
う対策が採られてきた。[0005] At this time, a convex surface defect called a pickup occurs during the siliconizing treatment, and the surface properties and workability of the steel strip are significantly deteriorated. Conventionally, the cause of this pickup has been considered to be "silica" generated by the reaction of oxygen in a silicon dioxide atmosphere with an oxidizing gas containing silicon tetrachloride. Measures have been taken.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記技
術を用いても表面性状、加工性とも不十分である。本発
明は上記問題点に鑑みなされたもので、表面性状及び加
工性の優れた高けい素鋼板の製造方法を提供することを
目的とする。However, even if the above technique is used, both the surface properties and workability are insufficient. The present invention has been made in view of the above problems, and has as its object to provide a method for producing a high silicon steel sheet having excellent surface properties and workability.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、上記課題
を解決すべく研究を重ねた結果、以下の知見を得た。 ・浸珪処理する際に、浸珪処理前の母材の酸化状態によ
っては、母材とけい素化合物とが反応し、鋼板表層にけ
い素酸化物が生成する場合がある。このけい素酸化物は
炉内にて鋼帯に接触する部分、例えば炉内ハースロール
等へ付着し、鋼帯に押し疵を発生させ鋼帯の表面性状を
著しく劣化させる。Means for Solving the Problems The present inventors have conducted various studies to solve the above problems, and have obtained the following findings. -During the siliconizing treatment, depending on the oxidation state of the base material before the siliconizing treatment, the base material and the silicon compound react with each other, and silicon oxide may be generated on the surface layer of the steel sheet. The silicon oxide adheres to a portion of the furnace that comes into contact with the steel strip, for example, a hearth roll in the furnace, and generates a pressing flaw in the steel strip to significantly deteriorate the surface properties of the steel strip.
【０００８】・酸化の激しい母材を浸珪処理した場合
は、母材の有する酸素源により浸珪後、結晶粒界の酸化
が発生し結晶粒界の結合力が低下し、加工性が著しく劣
化させる[0008] When a silicon material is subjected to siliconizing treatment with a highly oxidized material, after siliconizing by an oxygen source contained in the material, oxidation of the crystal grain boundaries occurs, and the bonding force of the crystal grain boundaries is reduced, resulting in remarkable workability. Degrade
【０００９】・浸珪処理時に、鋼板表層にけい素酸化物
を生成させないためには、浸珪処理前の加熱処理で、浸
珪母材の事前酸化を防止することが重要であり、浸珪母
材の事前酸化を防止するためには加熱処理において、加
熱速度及び雰囲気を規定する必要がある以上のことを見
出した。In order to prevent silicon oxide from being formed on the surface of the steel sheet during the siliconizing treatment, it is important to prevent the pre-oxidation of the siliconized base material by a heat treatment before the siliconizing treatment. In order to prevent the pre-oxidation of the base material, it has been found that it is necessary to regulate the heating rate and atmosphere in the heat treatment.
【００１０】本発明はかかる知見に基づきなされたもの
で、以下のような構成を有する。本発明は、Si：4wt％
未満の母材鋼板に対して、加熱処理、浸珪処理、拡散均
熱処理及び冷却処理を順次行い、高けい素鋼板を製造す
る方法において、前記加熱処理を下式を満足する雰囲気
中でかつ500℃以上での昇温速度が50℃／min以上となる
ように加熱することを特徴とする表面性状及び加工性に
優れた高けい素鋼板の製造方法である。 [02]×[H2O]1/4≦70 但し [O2]：酸素濃度（ppm）、[H2O]：水蒸気濃度 (pp
m) なお、本明細書において、鋼の成分を示す％はすべてwt
％である。[0010] The present invention has been made based on such knowledge, and has the following configuration. In the present invention, Si: 4 wt%
Heat treatment, siliconizing treatment, diffusion soaking heat treatment and cooling treatment are sequentially performed on the base material steel sheet of less than, and in a method of manufacturing a high silicon steel sheet, the heat treatment is performed in an atmosphere satisfying the following expression and 500. A method for producing a high silicon steel sheet having excellent surface properties and workability, characterized in that heating is performed so that the rate of temperature rise at 50 ° C. or more is 50 ° C./min or more. [0 2 ] × [H 2 O] 1/4 ≦ 70 where [O 2 ]: oxygen concentration (ppm), [H 2 O]: water vapor concentration (pp
m) In the present specification, all percentages indicating steel components are wt%
%.
【００１１】[0011]
【発明の実施の形態】以下、本発明の詳細をその限定理
由とともに説明する。本発明による高けい素鋼板の製造
方法は、圧延による製造が容易なSi：4％未満の鋼板を
母材鋼板とし、この母材鋼板に対して加熱処理、浸珪処
理、拡散均熱処理及び冷却処理を順次実施することによ
り高けい素鋼板を製造する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below together with the reasons for limiting the same. The method for producing a high silicon steel sheet according to the present invention is characterized in that a steel sheet having an Si content of less than 4%, which is easy to produce by rolling, is used as a base steel sheet, and the base steel sheet is subjected to heat treatment, siliconizing treatment, diffusion soaking treatment, and cooling. The high silicon steel sheet is manufactured by sequentially performing the treatment.
【００１２】以下、その一実施形態について説明する
と、まず、Si：4％未満の鋼を熱間圧延、冷間圧延し、
薄板（母材鋼板）とする。母材鋼板を無酸化性ガス雰囲
気中で浸珪処理温度またはその近傍まで加熱し、次い
で、四塩化けい素が5〜35vol%含まれる無酸化性ガス雰
囲気中において1023〜1200℃の温度で連続的に母材鋼板
に浸珪処理を施す。In the following, an embodiment will be described. First, steel having a content of Si: less than 4% is hot-rolled and cold-rolled.
It shall be a thin plate (base material steel plate). The base steel sheet is heated to or near the siliconizing temperature in a non-oxidizing gas atmosphere, and then continuously at a temperature of 1023 to 1200 ° C in a non-oxidizing gas atmosphere containing 5 to 35 vol% silicon tetrachloride. The base steel sheet is subjected to siliconizing treatment.
【００１３】次いで、この浸珪処理を施された鋼板に四
塩化けい素を含まない無酸化性ガス雰囲気中で拡散均熱
処理を施し、板表層に生成したSi富化層を板厚方向に拡
散させた後、常温ないし300℃まで冷却し、しかる後巻
き取り、高けい素鋼板を得る。Next, the siliconized steel sheet is subjected to a diffusion soaking treatment in a non-oxidizing gas atmosphere containing no silicon tetrachloride to diffuse the Si-enriched layer formed on the sheet surface in the thickness direction. After cooling, it is cooled to room temperature to 300 ° C., and then wound up to obtain a high silicon steel sheet.
【００１４】得られた高けい素鋼板は、焼鈍を施し、必
要に応じて絶縁を目的とする皮膜が塗布される。対象と
なる絶縁皮膜の種類としては、酸素もしくは酸化物を含
む有機タイプ、有機−無機混合タイプ、無機タイプがあ
げられる。また、必要に応じて絶縁・コア形状成形の目
的でワニスが含浸される。The obtained high silicon steel sheet is annealed and coated with a coating for insulation as required. Examples of the type of the insulating film include an organic type containing oxygen or an oxide, an organic-inorganic mixed type, and an inorganic type. Also, if necessary, a varnish is impregnated for the purpose of molding the insulation and core shape.
【００１５】このようにして製造される高けい素鋼板の
Siは4〜7％とするのが好ましい。Siが4％未満では鉄損
が大きく、一方、7％を超えると脆くなるためである。The high silicon steel sheet thus manufactured
Si is preferably set to 4 to 7%. If Si is less than 4%, iron loss is large, while if it exceeds 7%, it becomes brittle.
【００１６】本発明では、このようにして得られる高け
い素鋼板の製造方法において、加熱処理を500℃以上で
の昇温速度が50℃／min以上となるように行う。これは
本発明において最も重要な要件である。In the present invention, in the method for producing a high silicon steel sheet thus obtained, the heat treatment is performed so that the rate of temperature rise at 500 ° C. or more is 50 ° C./min or more. This is the most important requirement in the present invention.
【００１７】500℃は、鋼板が著しく酸化し、表面性状
と加工性に影響を及ぼす温度の下限値である。また、鋼
板の加熱速度が50℃／min未満ではその雰囲気中の水分
・酸素分に関わらず鋼板表層の酸化反応が十分に進行し
てしまい浸珪処理後鋼板の表面性状や加工性が劣化して
しまうため、鋼板の加熱速度は50℃／min以上とする。
また、より安定した加工性を得るため、好ましくは150
℃／min以上とする。また、一般に、浸珪処理における
加熱温度の上限は1250℃である。500 ° C. is the lower limit of the temperature at which the steel sheet is significantly oxidized and affects the surface properties and workability. If the heating rate of the steel sheet is less than 50 ° C / min, the oxidation reaction of the surface layer of the steel sheet will proceed sufficiently regardless of the moisture and oxygen content in the atmosphere, and the surface properties and workability of the steel sheet after siliconizing treatment will deteriorate. Therefore, the heating rate of the steel sheet is set to 50 ° C./min or more.
In order to obtain more stable workability, preferably 150
℃ / min or more. In general, the upper limit of the heating temperature in the siliconizing treatment is 1250 ° C.
【００１８】上記条件下で、本発明では、さらに、下式
を満足する雰囲気下で加熱処理を行う。これもまた、本
発明において最も重要な要件である。 [02]×[H2O]1/4≦70 但し [O2]：酸素濃度（ppm）、[H2O]：水蒸気濃度 (pp
m) 上式の上限は、酸素濃度および水蒸気濃度の制御が一般
的に実操業上可能な範囲でありかつ加工性および表面性
状に効果が得られる範囲を実験的に選択した。Under the above conditions, according to the present invention, a heat treatment is further performed in an atmosphere satisfying the following formula. This is also the most important requirement in the present invention. [0 2 ] × [H 2 O] 1/4 ≦ 70 where [O 2 ]: oxygen concentration (ppm), [H 2 O]: water vapor concentration (pp
m) The upper limit of the above equation was experimentally selected so that the control of the oxygen concentration and the water vapor concentration was generally in a range where practical operation was possible and the effects on the workability and surface properties were obtained.
【００１９】上式の下限については特に設けないが、酸
素濃度・水蒸気濃度を管理し、可能な限り低減すること
が望ましい。さらに、上式の範囲内にあっても酸素濃度
もしくは水蒸気濃度が単独で高い値を示す場合には効果
が減ずることもある。そのため、酸素濃度は45ppm以
下、露点にて−30℃以下（水蒸気濃度は375ppm以下）で
あることが望ましい。Although the lower limit of the above equation is not particularly set, it is desirable to control the oxygen concentration and the water vapor concentration and reduce them as much as possible. Furthermore, even when the oxygen concentration or the water vapor concentration alone shows a high value even within the range of the above equation, the effect may be reduced. Therefore, it is desirable that the oxygen concentration be 45 ppm or less and the dew point be -30 ° C or less (water vapor concentration be 375 ppm or less).
【００２０】但し、酸素濃度・水蒸気濃度の低減には実
際上は限界があり、[02]×[H2O]1/4の値で18、また酸素
濃度：10ppm及び水蒸気濃度：10ppmが現状、実操業上の
限界となる。そして、このようなレベルまで低減しても
昇温速度を適正化しないと酸化が生じてしまう。よっ
て、本発明は[02]×[H2O]1/4≧18以上の雰囲気で特に有
効である。However, there is a practical limit to the reduction of the oxygen concentration and the water vapor concentration. The value of [0 2 ] × [H 2 O] 1/4 is 18, and the oxygen concentration: 10 ppm and the water vapor concentration: 10 ppm At present, it is the limit in actual operation. Even if the temperature is reduced to such a level, oxidation occurs unless the heating rate is optimized. Therefore, the present invention is particularly effective in an atmosphere of [0 2 ] × [H 2 O] 1/4 ≧ 18 or more.
【００２１】なお、本発明の対象は方向性けい素鋼板で
あるか無方向性けい素鋼板であるかは問わない。また、
通常電磁鋼板の表面には絶縁を目的とした皮膜が形成さ
れたり、ワニスが含浸されたりするが、本発明の効果は
このような皮膜、ワニスの種類に影響されない。The object of the present invention does not matter whether it is a grain-oriented silicon steel sheet or a non-oriented silicon steel sheet. Also,
Usually, a film for the purpose of insulation is formed on the surface of the electromagnetic steel sheet or varnish is impregnated, but the effect of the present invention is not affected by the kind of such a film or varnish.
【００２２】[0022]
【実施例】図1に示すような入側から順に加熱帯1、浸珪
処理帯2、均熱帯3、冷却帯4を備えた連続浸珪処理設備
において、Si：3％の母材鋼板に加熱処理、浸珪処理、
拡散均熱処理及び冷却処理を施し、Si：6.5％の高けい
素鋼板を製造した。加熱処理では鋼板を1200℃に加熱し
た後、1200℃で浸珪処理を行った。[Example] In a continuous siliconizing treatment facility having a heating zone 1, a siliconizing zone 2, a soaking zone 3, and a cooling zone 4 in order from the entrance side as shown in FIG. Heat treatment, siliconizing treatment,
Diffusion soaking heat treatment and cooling treatment were performed to produce a high silicon steel sheet with Si: 6.5%. In the heat treatment, the steel sheet was heated to 1200 ° C., and then siliconized at 1200 ° C.
【００２３】実施例では、加熱帯の雰囲気及び加熱速度
を変化させ、浸珪処理後材料の押し疵の発生頻度及び限
界曲げ半径を測定した。浸珪処理材板厚は0.1mmとし
た。また、浸珪処理、均熱拡散処理、冷却処理は一定の
雰囲気条件下で行った。図2に[02]×[H2O] 1/4と押し疵
発生頻度との関係を示す。ここで、押し疵の発生頻度は
検査員目視にて高さ20μm以上の押し疵発生数を一定コ
イル長さ間で計測した。In the examples, the frequency of occurrence of pressing flaws and the critical bending radius of the material after the siliconizing treatment were measured by changing the atmosphere and the heating rate in the heating zone. The thickness of the siliconized material was 0.1 mm. Further, the siliconizing treatment, the soaking diffusion treatment, and the cooling treatment were performed under certain atmospheric conditions. FIG. 2 shows the relationship between [0 2 ] × [H 2 O] 1/4 and the frequency of occurrence of press flaws. Here, the frequency of occurrence of the press flaw was determined by visually observing the number of press flaws having a height of 20 μm or more between the fixed coil lengths.
【００２４】図2より、加熱速度50℃/min以上で[02]×
[H2O] 1/4が70以下であれば、押し疵は発生しておら
ず、表面性状は良好である。一方、加熱速度50℃/min未
満若しくは [02]×[H2O] 1/4が70超えでは押し疵の発
生を完全に無くすことが出来ず、押し疵が発生してい
る。FIG. 2 shows that at a heating rate of 50 ° C./min or more, [0 2 ] ×
When [H 2 O] 1/4 is 70 or less, no press flaw is generated and the surface properties are good. On the other hand, if the heating rate is less than 50 ° C./min or [0 2 ] × [H 2 O] 1/4 is more than 70, the occurrence of the press flaw cannot be completely eliminated, and the press flaw is generated.
【００２５】また、図3に[02]×[H2O] 1/4と限界曲げ半
径との関係を示す。ここで、限界曲げ半径は、径の異な
ったパイプに試片を巻き付け、試片が破壊せずに 巻き
付くことが出来た最小パイプ半径とした。FIG. 3 shows the relationship between [0 2 ] × [H 2 O] 1/4 and the critical bending radius. Here, the critical bending radius was defined as the minimum pipe radius at which the test piece was wound around pipes having different diameters and could be wound without breaking the test piece.
【００２６】図3より、加熱速度50℃/min以上で[02]×
[H2O] 1/4が70以下であれば限界曲げ半径は5mm以下であ
り加工性が非常に良好である。一方、加熱速度50℃/min
未満若しくは [02]×[H2O] 1/4が70超えでは限界曲げ
半径は5mm超えとなり、加工性が劣っている。FIG. 3 shows that at a heating rate of 50 ° C./min or more, [0 2 ] ×
If [H 2 O] 1/4 is 70 or less, the critical bending radius is 5 mm or less, and workability is very good. On the other hand, heating rate 50 ℃ / min
If it is less than or [0 2 ] × [H 2 O] 1/4 exceeds 70, the critical bending radius exceeds 5 mm, and the workability is poor.
【００２７】[0027]
【発明の効果】本発明によれば、表面性状及び加工性の
優れた高けい素鋼板が得られる。そして、このように本
発明により得られた高けい素鋼板は表面性状及び加工性
に優れているので、トランスやモ−タ等の電気機器用鉄
心材料として好適である。According to the present invention, a high silicon steel sheet having excellent surface properties and workability can be obtained. The high silicon steel sheet thus obtained according to the present invention is excellent in surface properties and workability, and thus is suitable as a core material for electric equipment such as transformers and motors.
【図1】連続Si浸珪処理ラインを示す図である。FIG. 1 is a view showing a continuous Si siliconizing treatment line.
【図2】加熱処理の雰囲気中の[02]×[H2O] 1/4と押し疵
発生頻度との関係を示す図である。FIG. 2 is a diagram showing the relationship between [0 2 ] × [H 2 O] 1/4 in the atmosphere of a heat treatment and the frequency of occurrence of press flaws.
【図3】加熱処理の雰囲気中の[02]×[H2O] 1/4と限界曲
げ半径との関係を示す図である。FIG. 3 is a diagram showing a relationship between [0 2 ] × [H 2 O] 1/4 and a critical bending radius in an atmosphere of a heat treatment.
【符号の説明】 1 加熱帯 2 浸珪処理帯 3 均熱帯 4 冷却帯[Explanation of Signs] 1 Heating zone 2 Silicified zone 3 Uniform tropical zone 4 Cooling zone
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山路 常弘 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 (72)発明者 藤田 耕一郎 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 Ｆターム(参考） 4K033 AA01 AA02 MA02 MA04 NA02 NA04 PA00 SA00 TA00 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tsunehiro Yamaji 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Koichiro Fujita 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Sun F-term in Honko Co., Ltd. (reference) 4K033 AA01 AA02 MA02 MA04 NA02 NA04 PA00 SA00 TA00
Claims (1)
処理、浸珪処理、拡散均熱処理及び冷却処理を順次行
い、高けい素鋼板を製造する方法において、前記加熱処
理を下式を満足する雰囲気中でかつ500℃以上での昇温
速度が50℃／min以上となるように加熱することを特徴
とする表面性状及び加工性に優れた高けい素鋼板の製造
方法。 [02]×[H2O]1/4≦70 但し [O2]：酸素濃度（ppm）、[H2O]：水蒸気濃度 (pp
m)1. In a method for producing a high silicon steel sheet, a heat treatment, a siliconizing treatment, a diffusion soaking treatment and a cooling treatment are sequentially performed on a base steel sheet having a content of less than 4 wt% of Si: A method for producing a high silicon steel sheet having excellent surface properties and workability, characterized by heating in an atmosphere that satisfies the formula and at a temperature rise rate of 500 ° C. or more at a rate of 50 ° C./min or more. [0 2 ] × [H 2 O] 1/4 ≦ 70 where [O 2 ]: oxygen concentration (ppm), [H 2 O]: water vapor concentration (pp
m)
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|---|---|---|---|
| JP2000064264A JP4010090B2 (en) | 2000-03-09 | 2000-03-09 | Method for producing high silicon steel sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000064264A JP4010090B2 (en) | 2000-03-09 | 2000-03-09 | Method for producing high silicon steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001254124A true JP2001254124A (en) | 2001-09-18 |
| JP4010090B2 JP4010090B2 (en) | 2007-11-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008050663A (en) * | 2006-08-25 | 2008-03-06 | Jfe Steel Kk | Method for producing high-silicon steel sheet |
| WO2016089076A1 (en) * | 2014-12-05 | 2016-06-09 | 주식회사 포스코 | High silicon steel plate having excellent magnetic property and manufacturing method thereof |
-
2000
- 2000-03-09 JP JP2000064264A patent/JP4010090B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008050663A (en) * | 2006-08-25 | 2008-03-06 | Jfe Steel Kk | Method for producing high-silicon steel sheet |
| WO2016089076A1 (en) * | 2014-12-05 | 2016-06-09 | 주식회사 포스코 | High silicon steel plate having excellent magnetic property and manufacturing method thereof |
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|---|---|
| JP4010090B2 (en) | 2007-11-21 |
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