JP2662482B2 - Low iron loss grain-oriented electrical steel sheet - Google Patents
Low iron loss grain-oriented electrical steel sheetInfo
- Publication number
- JP2662482B2 JP2662482B2 JP4222850A JP22285092A JP2662482B2 JP 2662482 B2 JP2662482 B2 JP 2662482B2 JP 4222850 A JP4222850 A JP 4222850A JP 22285092 A JP22285092 A JP 22285092A JP 2662482 B2 JP2662482 B2 JP 2662482B2
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- coating
- iron loss
- oriented electrical
- electrical steel
- 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 - Fee Related
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- Chemical Treatment Of Metals (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は鋼板に対して張力を付与
する被膜を表面に有することによって、鉄損が低減され
た方向性電磁鋼板に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain-oriented electrical steel sheet having reduced iron loss by providing a coating for imparting tension to the steel sheet on the surface.
【０００２】[0002]
【従来の技術】方向性電磁鋼板は磁気鉄芯材料として多
用されており、エネルギーロスを少なくするために鉄損
を低減することが要求されている。方向性電磁鋼板の鉄
損を低減する手段としては、仕上焼鈍後の鋼板表面にレ
ーザービームを照射して局部的な歪を与え、それによっ
て磁区を細分化する方法が特開昭５８−２６４０５号公
報に開示されている。2. Description of the Related Art Grain-oriented electrical steel sheets are widely used as magnetic iron core materials, and it is required to reduce iron loss in order to reduce energy loss. As a means for reducing iron loss of grain-oriented electrical steel sheets, Japanese Patent Application Laid-Open No. 58-26405 discloses a method of irradiating a laser beam to a steel sheet surface after finish annealing to give local strain, thereby subdividing magnetic domains. It is disclosed in the gazette.
【０００３】また、仕上焼鈍後の材料表面に存在するグ
ラス被膜を除去し、磁区の動きを阻害する鋼板表面近傍
の内部酸化層を除去する方法、および地鉄表面の凸凹を
取り除いて鏡面仕上げを行い、その表面に金属メッキを
施すことによる鉄損向上方法が特公昭５２−２４４９９
号公報に記載されている。In addition, a method of removing a glass film present on a material surface after finish annealing to remove an internal oxide layer near a steel sheet surface which hinders the movement of a magnetic domain, and a method of removing a surface irregularity of a ground iron surface to obtain a mirror finish. A method of improving iron loss by performing metal plating on the surface is disclosed in JP-B-52-24499.
No., published in Japanese Unexamined Patent Publication No.
【０００４】一方で方向性電磁鋼板は張力を付与するこ
とによっても鉄損が低下することが知られており、特に
低鉄損化が達成されるため、上述のグラス被膜を除去し
鏡面化した鋼板表面に張力被膜を形成しようとする試み
も近年数多くなされている。例えば、特公昭５６−４１
５０号公報、特開昭６１−２０１７３２号公報、特公昭
６３−５４７６７号公報、特開平２−２１３４８３号公
報等には真空蒸着、化学蒸着、スパッタリング、イオン
プレーティング等による被膜形成方法が、また特開平２
−２４３７７０号公報、特開平３−１３０３７６号公報
にはゾル・ゲル法による被膜形成方法が開示されてい
る。[0004] On the other hand, it is known that the iron loss of a grain-oriented electrical steel sheet is also reduced by applying a tension. In particular, since the reduction of the iron loss is achieved, the above-mentioned glass coating is removed to obtain a mirror surface. In recent years, many attempts have been made to form a tension film on the surface of a steel sheet. For example, Japanese Patent Publication No. 56-41
No. 50, JP-A-61-201732, JP-B-63-54767, JP-A-2-213483, and the like, a method of forming a film by vacuum deposition, chemical vapor deposition, sputtering, ion plating, etc. JP 2
JP-A-243770 and JP-A-3-130376 disclose a method of forming a film by a sol-gel method.
【０００５】鋼板に高い張力を付与し、その結果として
鉄損値を低減させるためには、鋼板上に形成せしめる被
膜の材質が特に重要である。従来、工業的には上述のグ
ラス被膜（フォルステライト質被膜）、およびその表面
のコロイダルシリカ−リン酸系被膜の両者によって鉄損
を低減させられることがわかっている。しかしながら、
さらに格段の低鉄損を実現するために、張力付与性のよ
り高い被膜材質へのニーズが高まっている。[0005] In order to impart high tension to the steel sheet and consequently reduce the iron loss value, the material of the coating film formed on the steel sheet is particularly important. Conventionally, it has been industrially known that iron loss can be reduced by both the above-mentioned glass coating (forsterite coating) and the colloidal silica-phosphate coating on the surface thereof. However,
Further, in order to realize a remarkably low iron loss, a need for a coating material having a higher tension imparting property is increasing.
【０００６】[0006]
【発明が解決しようとする課題】本発明はこれらの従来
技術における課題を解決し、仕上焼鈍後の鋼板表面に、
より高い張力を付与できる被膜を有する鉄損の低い方向
性電磁鋼板を提供することを目的とする。SUMMARY OF THE INVENTION The present invention solves these problems in the prior art and provides a steel sheet surface after finish annealing.
It is an object of the present invention to provide a grain-oriented electrical steel sheet having a coating capable of imparting a higher tension and having a low iron loss.
【０００７】[0007]
【課題を解決するための手段】本発明は、酸化アルミニ
ウム−酸化硼素を主成分とする複合被膜が表面に形成さ
れた低鉄損方向性電磁鋼板を要旨とするものである。さ
らに、酸化アルミニウム−酸化硼素を主成分とする複合
被膜が、Ａｌ18Ｂ4 Ｏ33 とＡｌ4 Ｂ2 Ｏ9 なる複合酸化
物のいずれか一方または双方を含有する低鉄損方向性電
磁鋼板を要旨とする。SUMMARY OF THE INVENTION The present invention provides a low iron loss grain-oriented electrical steel sheet having a composite coating mainly composed of aluminum oxide-boron oxide formed on its surface. Furthermore, the composite coating mainly composed of aluminum oxide-boron oxide is a low iron loss grain-oriented electrical steel sheet containing one or both of composite oxides of Al 18 B 4 O 33 and Al 4 B 2 O 9. Make a summary.
【０００８】[0008]
【作用】本発明の低鉄損方向性電磁鋼板は、従来公知の
方法で仕上焼鈍を行って表面にフォルステライト質のグ
ラス被膜が形成された鋼板、またこの表面に生成してい
るグラス被膜および内部酸化層を酸に浸漬して除去した
鋼板、さらにそれを水素中で平坦化焼鈍を施した鋼板、
あるいは化学研磨、電解研磨等の研磨を施した鋼板上に
酸化アルミニウム−酸化硼素系の複合被膜を形成したも
のである。The low iron loss grain-oriented electrical steel sheet of the present invention is a steel sheet having a forsterite glass film formed on the surface by finish annealing by a conventionally known method, and a glass film formed on the surface. A steel sheet whose internal oxide layer has been removed by immersion in acid, and a steel sheet which has been subjected to flattening annealing in hydrogen,
Alternatively, an aluminum oxide-boron oxide-based composite film is formed on a steel plate which has been subjected to polishing such as chemical polishing or electrolytic polishing.
【０００９】また被膜生成に対して不活性なアルミナ粉
末等を塗布してグラス被膜を生成させない条件下で仕上
焼鈍を行って得た鋼板上に、酸化アルミニウム−酸化硼
素系の複合被膜を形成したものである。An aluminum oxide-boron oxide composite coating is formed on a steel sheet obtained by applying finish annealing to a coating which does not form a glass coating by applying an alumina powder or the like which is inert to the formation of the coating. Things.
【００１０】従来より電磁鋼板への張力付与には熱膨張
係数の小さい被膜材質を選択し、鋼板との熱膨張係数差
によって冷却時に生じる応力を利用していた。しかしな
がら、熱膨張係数差だけでなく被膜材質のヤング率等も
鋼板への張力付与に影響を及ぼす因子であることが特開
昭４８−３９３３８号公報に指摘されている。Hitherto, a coating material having a small thermal expansion coefficient has been selected for applying tension to an electromagnetic steel sheet, and a stress generated during cooling due to a difference in thermal expansion coefficient from the steel sheet has been used. However, it is pointed out in Japanese Patent Application Laid-Open No. 48-39338 that not only the difference in thermal expansion coefficient but also the Young's modulus of the coating material is a factor that affects the application of tension to the steel sheet.
【００１１】本発明にいう酸化アルミニウム−酸化硼素
系複合被膜のうち、酸化アルミニウム材質は鋼板との熱
膨張係数差（約４×１０-6Ｋ-1）はそれほど大きくない
が、ヤング率（３〜４×１０4 kgf・mm-2）が大きいた
めに鋼板に大きな張力を付与できる。In the aluminum oxide-boron oxide composite coating film of the present invention, the difference between the thermal expansion coefficient of the aluminum oxide material and the steel plate (about 4 × 10 −6 K −1 ) is not so large, but the Young's modulus (3 ４4 × 10 4 kgf · mm -2 ), so that a large tension can be applied to the steel sheet.
【００１２】被膜のもう一方の材質である酸化硼素につ
いては、鋼板との熱膨張係数差が大きいと考えられるこ
との他に、被膜の焼き付け工程においてその存在が酸化
アルミニウムの焼成温度を低減して焼成を容易にするこ
と、また被膜の鋼板への密着性を助長する働きがあるこ
とを見い出したものである。[0012] Boron oxide, which is the other material of the coating, is considered to have a large difference in thermal expansion coefficient from that of the steel sheet. It has been found that it has the function of facilitating firing and promoting the adhesion of the coating to the steel sheet.
【００１３】ここでいう密着性とは、かかる被膜を表面
に形成した鋼板を、例えば２０mmφのロール棒を用いて
この棒の周りに１８０度の角度ほど曲げる試験を行った
場合に、被膜が全く剥離しない程度の密着性である。[0013] The term "adhesion" as used herein means that when a steel sheet having such a coating formed on its surface is subjected to a test in which a steel rod having a diameter of, for example, 20 mmφ is bent at an angle of 180 degrees around the rod, the coating is completely removed. Adhesiveness that does not peel off.
【００１４】本発明の酸化アルミニウム−酸化硼素系複
合被膜によって鋼板に付与される張力は１．０kgf/mm2
以上であるが、好ましくは１．２kgf/mm2 以上、より好
ましくは１．５kgf/mm2 以上である。The tension applied to the steel sheet by the aluminum oxide-boron oxide composite coating of the present invention is 1.0 kgf / mm 2.
Above in which it is preferably 1.2 kgf / mm 2 or more, more preferably 1.5 kgf / mm 2 or more.
【００１５】本発明の酸化アルミニウム−酸化硼素系複
合被膜は複合酸化物のＡｌ18Ｂ4 Ｏ33および／またはＡ
ｌ4 Ｂ2 Ｏ9 を含有するものであるが、発明者らはこれ
らの複合酸化物が被膜中に存在する場合に鋼板に対し
て、顕著に大きな張力が付与されることを見いだしたも
のである。これらの複合酸化物は、例えば被膜原料を酸
化アルミニウムおよび酸化硼素とした場合、鋼板表面に
塗布したセラミックスを高温で焼き付ける工程で化学反
応により生成されるものであり、焼き付け温度が高いほ
ど顕著に生成され、約１０００℃以上の焼き付け温度で
あれば生成が容易になされる。The aluminum oxide-boron oxide composite coating film of the present invention is a composite oxide of Al 18 B 4 O 33 and / or A
Although those containing l 4 B 2 O 9, intended to have found that these compound oxide relative to steel when present in the coating, high tension significantly is applied is there. For example, when the coating material is aluminum oxide and boron oxide, these composite oxides are generated by a chemical reaction in a step of baking the ceramic applied to the surface of the steel sheet at a high temperature. If the baking temperature is about 1000 ° C. or more, the formation is facilitated.
【００１６】また、塗布する酸化アルミニウムと酸化硼
素の成分比によってどちらの複合酸化物が生成し易いか
の傾向があり、この成分比がモル比で９：２に近いか或
いはこれより酸化アルミニウムが豊富なときはＡｌ18Ｂ
4 Ｏ33が生成し易く、この成分比がモル比で２：１に近
いか或いはこれより酸化硼素が豊富な場合はＡｌ4 Ｂ2
Ｏ9 が生成し易い。また、被膜中にこれらの複合酸化物
が生成されている方が生成されていない場合と比べて、
鋼板に対してより大きな張力が付与できることを発明者
らは見い出している。Further, there is a tendency that which composite oxide is more likely to be produced depending on the component ratio of aluminum oxide and boron oxide to be applied, and this component ratio is close to 9: 2 in molar ratio or aluminum oxide is more than this. Al 18 B when abundant
When 4 O 33 is easily formed and its component ratio is close to 2: 1 in molar ratio or when boron oxide is richer than this, Al 4 B 2
O 9 is easily generated. In addition, compared to the case where these composite oxides are not generated in the coating,
The inventors have found that greater tension can be applied to a steel sheet.
【００１７】本発明の鋼板に形成された被膜の厚さは特
に限定されるものではなく、いかなる厚さをも採用し得
る。しかしながら、被膜が厚すぎる場合には占積率が著
しく低下するため、できるだけ薄いものが良く、５μｍ
以下、好ましくは３μｍ以下、より好ましくは２μｍ以
下である。特に薄手鋼板には薄い被膜が必要不可欠であ
る。The thickness of the coating formed on the steel sheet of the present invention is not particularly limited, and any thickness can be adopted. However, if the coating is too thick, the space factor is significantly reduced.
Or less, preferably 3 μm or less, more preferably 2 μm or less. In particular, a thin coating is indispensable for a thin steel plate.
【００１８】以上本発明の低鉄損方向性電磁鋼板につい
て述べたが、鋼板に高張力を付与し、それによって低鉄
損化が達成されている。特に鏡面化した鋼板に本発明に
従い被膜を形成した場合は、鉄損の低減効果が著しく大
きい。As described above, the low iron loss grain-oriented electrical steel sheet of the present invention has been described, but a high tensile force is applied to the steel sheet to thereby reduce the iron loss. In particular, when a coating is formed on a mirror-finished steel sheet according to the present invention, the effect of reducing iron loss is extremely large.
【００１９】[0019]
実施例１ 市販のアルミナゾル（固型成分１０％を含む）１００重
量部、メタ硼酸１０重量部と分散剤少量からなるものを
蒸留水にてよく混合・希釈してコーティング用ゾルとし
て調製した。鋼板はＳｉを３．３wt％含有する板厚０．
２mmの仕上焼鈍後の高磁束密度一方向性電磁鋼板を硫酸
と弗酸の混合液中に浸漬し、表面のグラス被膜を除去し
て地鉄を露出させた後、弗酸と過酸化水素を含む溶液中
で地鉄界面を平滑にし、鏡面に仕上げて作製した。Example 1 A coating sol was prepared by sufficiently mixing and diluting 100 parts by weight of a commercially available alumina sol (containing 10% of a solid component), 10 parts by weight of metaboric acid, and a small amount of a dispersant with distilled water. The steel sheet contains 3.3 wt% of Si and has a thickness of 0.1 mm.
After immersing the high magnetic flux density grain-oriented electrical steel sheet after the finish annealing of 2 mm in a mixed solution of sulfuric acid and hydrofluoric acid, removing the glass film on the surface and exposing the base iron, hydrofluoric acid and hydrogen peroxide are removed. The ground metal interface was smoothed in a solution containing the solution and the mirror surface was finished.
【００２０】この鋼板にゾルを塗布し、乾燥させてゲル
化した後、８５０℃で５分間、窒素中、露点２０℃の雰
囲気で焼き付けを行った。得られた被膜は化学分析の結
果、酸化アルミニウムと酸化硼素を主成分としているこ
とを確認した。また、Ｘ線回折の結果、この被膜は結晶
質成分を含有していないことがわかった。The steel sheet was coated with a sol, dried and gelled, and baked at 850 ° C. for 5 minutes in a nitrogen atmosphere at a dew point of 20 ° C. As a result of chemical analysis, it was confirmed that the obtained coating mainly contained aluminum oxide and boron oxide. Further, as a result of X-ray diffraction, it was found that this coating did not contain a crystalline component.
【００２１】被膜形成前後の鋼板の磁気特性を表１にま
とめて示した。表１から鋼板には大きな張力が付与さ
れ、鉄損値も大幅に改善されていることがわかる。な
お、表１の被膜密着性で極めて良好とあるのは、被膜形
成後の鋼板を前述の２０mmφロール曲げ試験を行ったと
きに被膜の剥離が全く認められなかったことを意味す
る。Table 1 summarizes the magnetic properties of the steel sheet before and after the film was formed. From Table 1, it can be seen that a large tension is applied to the steel sheet, and the iron loss value is also greatly improved. The term "very good coating adhesion" in Table 1 means that no peeling of the coating was observed when the steel sheet after the formation of the coating was subjected to the above-described 20 mmφ roll bending test.
【００２２】実施例２ アルミニウムｓｅｃブトキシド１重量部を約９０℃に加
熱した１００重量部の蒸留水で加水分解し、沈澱を形成
させた後、この沈澱を０．１重量部の硝酸で解膠してほ
ぼ無色透明で均質なベーマイトゾルを得た。このベーマ
イトゾル１０００重量部とメタ硼酸２．５重量部を若干
量の分散剤と共によく混合してコーティング用ゾルを調
製した。塗布用鋼板としてはＳｉを３．２wt％含有する
板厚０．２mmの電磁鋼板を焼鈍分離剤としてアルミナを
塗布して仕上焼鈍を行うことによって、表面に被膜のな
い高磁束密度一方向性電磁鋼板を作製して用いた。Example 2 1 part by weight of aluminum sec butoxide was hydrolyzed with 100 parts by weight of distilled water heated to about 90 ° C. to form a precipitate, which was then peptized with 0.1 part by weight of nitric acid. As a result, an almost colorless, transparent and homogeneous boehmite sol was obtained. 1000 parts by weight of the boehmite sol and 2.5 parts by weight of metaboric acid were mixed well with a small amount of a dispersant to prepare a coating sol. As a coating steel sheet, a 0.2 mm thick electromagnetic steel sheet containing 3.2 wt% of Si is coated with alumina as an annealing separator, and then subjected to finish annealing, whereby a high magnetic flux density unidirectional electromagnetic coating without a coating on the surface is obtained. A steel plate was prepared and used.
【００２３】この鋼板に作製したゾルを塗布し、乾燥、
ゲル化後、１０００℃で５分間、窒素中で焼き付けを行
った。得られた被膜は化学分析の結果、酸化アルミニウ
ムと酸化硼素を主成分としていることを確認した。ま
た、Ｘ線回折の結果、Ａｌ4 Ｂ2 Ｏ9 が検出された。被
膜の性状および被膜形成前後の鋼板の磁気特性を表１に
まとめて示した。鋼板には大きな張力が付与され、その
結果鉄損値が大幅に改善されていることがわかる。The prepared sol is applied to the steel sheet, dried,
After gelation, baking was performed in nitrogen at 1000 ° C. for 5 minutes. As a result of chemical analysis, it was confirmed that the obtained coating mainly contained aluminum oxide and boron oxide. As a result of X-ray diffraction, Al 4 B 2 O 9 was detected. Table 1 summarizes the properties of the film and the magnetic properties of the steel sheet before and after the film was formed. It can be seen that a large tension was applied to the steel sheet, and as a result, the iron loss value was significantly improved.
【００２４】実施例３ 実施例１と同様の方法で均質なコーティング用ゾルを調
製した。塗布用鋼板としては、Ｓｉを３．３％含有する
板厚０．２mmの仕上焼鈍後のグラス被膜を有する高磁束
密度一方向性電磁鋼板を用いた。この鋼板にゾルを塗布
し、乾燥させてゲル化した後、８３０℃で２分間、水素
を１０％含有する窒素雰囲気で焼き付けを行った。Example 3 A homogeneous coating sol was prepared in the same manner as in Example 1. As the coating steel sheet, a high magnetic flux density unidirectional magnetic steel sheet having a glass coating after finish annealing and having a thickness of 0.2 mm and containing 3.3% of Si was used. The steel sheet was coated with a sol, dried and gelled, and baked at 830 ° C. for 2 minutes in a nitrogen atmosphere containing 10% of hydrogen.
【００２５】化学分析の結果、表面被膜の主成分は酸化
アルミニウムと酸化硼素であった。また、Ｘ線回折の結
果、この被膜は結晶質成分を含有していないことがわか
った。被膜形成前後の鋼板の磁気特性を表１に示した。
表１から鋼板に大きな張力が付与され、鉄損値も大きく
改善されていることがわかる。As a result of the chemical analysis, the main components of the surface film were aluminum oxide and boron oxide. Further, as a result of X-ray diffraction, it was found that this coating did not contain a crystalline component. Table 1 shows the magnetic properties of the steel sheet before and after the film was formed.
From Table 1, it can be seen that a large tension is applied to the steel sheet, and the iron loss value is also greatly improved.
【００２６】実施例４ 市販のアルミナゾル（固型成分１０％を含む）１００重
量部、メタ硼酸２．５重量部と分散剤少量からなるもの
を蒸留水にてよく混合・希釈してコーティング用ゾルと
して調製した。塗布用鋼板として、Ｓｉを３．２wt％含
有する板厚０．２mmの仕上焼鈍後のグラス被膜を有する
高磁束密度一方向性電磁鋼板を用いた。この鋼板にゾル
を塗布し、乾燥させてゲル化した後、１０００℃で５分
間、水素を１０％含有する窒素雰囲気で焼き付けを行っ
た。Example 4 A coating sol obtained by well mixing and diluting 100 parts by weight of a commercially available alumina sol (containing 10% of solid components), 2.5 parts by weight of metaboric acid and a small amount of a dispersant with distilled water. Prepared as As the coating steel sheet, a high magnetic flux density unidirectional magnetic steel sheet containing 3.2 wt% of Si and having a glass coating after finish annealing with a thickness of 0.2 mm was used. The steel sheet was coated with a sol, dried and gelled, and baked at 1000 ° C. for 5 minutes in a nitrogen atmosphere containing 10% of hydrogen.
【００２７】化学分析の結果、表面被膜の主成分は酸化
アルミニウムと酸化硼素であったが、Ｘ線回折の結果、
Ａｌ18Ｂ4 Ｏ33の生成が確認された。被膜の性状、被膜
形成前後の鋼板の磁気特性を表１に示した。表１から鋼
板に大きな張力が付与され、鉄損値も大きく改善されて
いることがわかる。As a result of the chemical analysis, the main components of the surface coating were aluminum oxide and boron oxide.
Formation of Al 18 B 4 O 33 was confirmed. Table 1 shows the properties of the film and the magnetic properties of the steel sheet before and after the film was formed. From Table 1, it can be seen that a large tension is applied to the steel sheet, and the iron loss value is also greatly improved.
【００２８】比較例 従来から工業的に実施されている方法の一例を比較のた
めに行った。塗布用鋼板として、Ｓｉを３．２wt％含有
する板厚０．２mmの仕上焼鈍後のグラス被膜を有する高
磁束密度一方向性電磁鋼板を用いた。この鋼板にコロイ
ダルシリカと燐酸アルミニウムを主成分とする混合液を
塗布・乾燥後、８５０℃で２分間、水素を若干含む窒素
中で焼き付けた。Comparative Example An example of a method conventionally used industrially was performed for comparison. As the coating steel sheet, a high magnetic flux density unidirectional magnetic steel sheet containing 3.2 wt% of Si and having a glass coating after finish annealing with a thickness of 0.2 mm was used. This steel sheet was coated with a mixed solution containing colloidal silica and aluminum phosphate as main components, dried, and baked at 850 ° C. for 2 minutes in nitrogen containing a little hydrogen.
【００２９】このようにして鋼板上に生成せしめた被膜
はＸ線回折の結果、フォルステライトが検出された。こ
の被膜の性状、およびシリカ−燐酸アルミニウム系被膜
形成前後の鋼板の磁気特性を表１の比較例の欄に示し
た。本発明よりなる前記実施例の結果と比較した場合、
鋼板には、さほど大きな張力が付与されておらず、被膜
形成による鉄損値低減もさほど顕著ではない。As a result of X-ray diffraction, forsterite was detected in the coating film thus formed on the steel sheet. The properties of this coating and the magnetic properties of the steel sheet before and after the formation of the silica-aluminum phosphate coating are shown in the column of Comparative Example in Table 1. When compared with the results of the example according to the invention,
No large tension is applied to the steel sheet, and the reduction in iron loss value due to the formation of the coating film is not so remarkable.
【００３０】[0030]
【表１】 [Table 1]
【００３１】[0031]
【発明の効果】本発明は鋼板への高い張力の付与が可能
な被膜を有する鉄損値の低い方向性電磁鋼板を提供する
ものであり、その工業的効果は甚大である。According to the present invention, there is provided a grain-oriented electrical steel sheet having a coating capable of applying a high tension to a steel sheet and having a low iron loss value, and its industrial effect is enormous.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭54−143737（ＪＰ，Ａ) 特開 平５−226134（ＪＰ，Ａ) 特開 昭63−184388（ＪＰ，Ａ) 特開 平２−243770（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-54-143737 (JP, A) JP-A-5-226134 (JP, A) JP-A-63-184388 (JP, A) JP-A-2- 243770 (JP, A)
Claims (2)
する複合被膜が表面に形成されたことを特徴とする低鉄
損方向性電磁鋼板。1. An aluminum oxide-boron oxide as a main component.
A low iron loss grain-oriented electrical steel sheet, characterized in that a complex coating is formed on the surface.
する複合被膜が、Ａｌ18Ｂ4 Ｏ33 とＡｌ4 Ｂ2 Ｏ9 のい
ずれか一方または双方を含有することを特徴とする請求
項１記載の低鉄損方向性電磁鋼板。2. An aluminum oxide-boron oxide main component.
Composite coating which is, Al 18 B 4 O 33 and Al 4 B 2 O 9 Neu
2. The low iron loss grain-oriented electrical steel sheet according to claim 1, which contains one or both of them.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4222850A JP2662482B2 (en) | 1992-08-21 | 1992-08-21 | Low iron loss grain-oriented electrical steel sheet |
| CA002089465A CA2089465C (en) | 1992-02-13 | 1993-02-12 | Oriented electrical steel sheet having low core loss and method of manufacturing same |
| KR1019930001910A KR960015212B1 (en) | 1992-02-13 | 1993-02-12 | Oriented electrical steel sheet having low core loss and method of manufacturing the same |
| EP19930102235 EP0555867B1 (en) | 1992-02-13 | 1993-02-12 | Oriented electrical steel sheet having low core loss and method of manufacturing same |
| DE1993629718 DE69329718T2 (en) | 1992-02-13 | 1993-02-12 | Oriented steel sheet with low core loss and process for its production |
| US08/017,673 US5411808A (en) | 1992-02-13 | 1993-02-12 | Oriented electrical steel sheet having low core loss and method of manufacturing same |
| US08/380,729 US5679177A (en) | 1992-02-13 | 1995-01-30 | Oriented electrical steel sheet having low core loss and method of manufacturing same |
| US08/788,437 US5753051A (en) | 1992-02-13 | 1997-01-28 | Oriented electrical steel sheet having low core loss and method of manufacturing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4222850A JP2662482B2 (en) | 1992-08-21 | 1992-08-21 | Low iron loss grain-oriented electrical steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0665755A JPH0665755A (en) | 1994-03-08 |
| JP2662482B2 true JP2662482B2 (en) | 1997-10-15 |
Family
ID=16788882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4222850A Expired - Fee Related JP2662482B2 (en) | 1992-02-13 | 1992-08-21 | Low iron loss grain-oriented electrical steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2662482B2 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4258202B2 (en) * | 2002-10-24 | 2009-04-30 | Ｊｆｅスチール株式会社 | Oriented electrical steel sheet having no forsterite coating and method for producing the same |
| EP2537958B1 (en) | 2010-02-18 | 2016-08-31 | Nippon Steel & Sumitomo Metal Corporation | Non-oriented electromagnetic steel sheet and process for production thereof |
| US8900688B2 (en) | 2011-05-27 | 2014-12-02 | Nippon Steel & Sumitomo Metal Corporation | Grain oriented electrical steel sheet and method of producing grain oriented electrical steel sheet |
| JP5984540B2 (en) * | 2012-07-12 | 2016-09-06 | Ｃｉｔｒｕｓ株式会社 | Heat shielding material and method for manufacturing the same, and heat shielding film and method |
| RU2604550C1 (en) | 2012-11-26 | 2016-12-10 | Ниппон Стил Энд Сумитомо Метал Корпорейшн | Oriented-grain electric steel sheet and method of producing oriented-grain electrical steel sheet |
| KR101632876B1 (en) | 2013-12-23 | 2016-06-23 | 주식회사 포스코 | Coating composition for electrical steel sheet, method for producing the same, and method for coating the electrical steel sheet using the same |
| KR101762339B1 (en) * | 2015-12-22 | 2017-07-27 | 주식회사 포스코 | Grain oriented electrical steel sheet, and method for manufacturing grain oriented electrical steel sheet |
| KR101919527B1 (en) * | 2016-12-23 | 2018-11-16 | 주식회사 포스코 | Oriented electrical steel sheet and method for manufacturing the same |
| US11499055B2 (en) | 2017-11-13 | 2022-11-15 | Nippon Steel Corporation | Coating solution for forming insulating film for grain-oriented electrical steel sheet, and method for producing grain-oriented electrical steel sheet |
| KR102044319B1 (en) * | 2017-12-26 | 2019-11-13 | 주식회사 포스코 | Grain oriented electrical steel sheet and method for manufacturing the same |
| KR102044327B1 (en) * | 2017-12-26 | 2019-11-13 | 주식회사 포스코 | Grain oriented electrical steel sheet, and method for manufacturing grain oriented electrical steel sheet |
| JP7027925B2 (en) * | 2018-02-06 | 2022-03-02 | 日本製鉄株式会社 | Electrical steel sheet and its manufacturing method |
| US20210002738A1 (en) | 2018-03-28 | 2021-01-07 | Nippon Steel Corporation | Coating liquid for forming insulation coating for grain-oriented electrical steel sheet, method of manufacturing grain-oriented electrical steel sheet, and grain-oriented electrical steel sheet |
| US20210381072A1 (en) | 2018-10-25 | 2021-12-09 | Nippon Steel Corporation | Coating liquid for forming insulation coating for grain-oriented electrical steel sheets, grain-oriented electrical steel sheet, and method for producing grain-oriented electrical steel sheet |
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| JPS54143737A (en) * | 1978-04-28 | 1979-11-09 | Kawasaki Steel Co | Formation of chromiummfree insulating top coating for directional silicon steel plate |
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1992
- 1992-08-21 JP JP4222850A patent/JP2662482B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| JPH0665755A (en) | 1994-03-08 |
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