JPH0672264B2 - Method for manufacturing low iron loss grain-oriented silicon steel sheet - Google Patents
Method for manufacturing low iron loss grain-oriented silicon steel sheetInfo
- Publication number
- JPH0672264B2 JPH0672264B2 JP60291844A JP29184485A JPH0672264B2 JP H0672264 B2 JPH0672264 B2 JP H0672264B2 JP 60291844 A JP60291844 A JP 60291844A JP 29184485 A JP29184485 A JP 29184485A JP H0672264 B2 JPH0672264 B2 JP H0672264B2
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- iron loss
- oriented silicon
- silicon steel
- grain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1294—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a localised treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は低鉄損方向性けい素鋼板の製造方法に関し、特
に変圧器等に使用される鉄損の低い方向性けい素鋼板を
有利に製造する方法についての提案である。TECHNICAL FIELD The present invention relates to a method for producing a low iron loss grain-oriented silicon steel sheet, and particularly to a grain-oriented silicon steel sheet with low iron loss used for a transformer or the like. This is a proposal for a manufacturing method.
かかる変圧器等の鉄心に使用される方向性けい素鋼板は
近年のエネルギー事情を背景にして、その低減すなわち
該方向性けい素鋼板の鉄損低減に対してより一層の改善
が望まれている。The grain-oriented silicon steel sheet used for the iron core of such a transformer is required to be further improved to reduce the iron loss of the grain-oriented silicon steel sheet in view of the recent energy situation. .
（従来の技術） ところで鉄損を減少させるには、鋼板の結晶方位を（11
0）〈001〉方位に高度に揃えること、Si含有量を上げ鋼
板の電気抵抗を増加させること、不純物を減少させるこ
と、および近年ではさらに鋼板の板厚を薄くすることな
どが種々試みられた。しかしこれらの冶金学的方法によ
る鉄損低減はほぼ限界に達している。(Prior art) By the way, in order to reduce the iron loss, the crystal orientation of the steel sheet should be (11
0) Various attempts have been made, such as highly aligning with the <001> orientation, increasing the Si content to increase the electrical resistance of the steel sheet, reducing impurities, and in recent years further reducing the thickness of the steel sheet. . However, the reduction of iron loss by these metallurgical methods has almost reached the limit.
そこで、従来、冶金学的な方法以外の鉄損低減策が種々
提案されている。Therefore, various iron loss reduction measures other than metallurgical methods have been conventionally proposed.
例えばその１つとして、仕上焼鈍済の鋼板を化学研摩も
しくは電解研摩により鏡面に仕上げることにより低鉄損
を得る方法がある。また特公昭58-14851号公報では、鏡
面仕上げした鋼板表面にボールペン状の小球を押しあて
て微小歪を導入することにより超低鉄損の方向性電磁鋼
板を得る方法を提案している。しかしなかがら、これら
の方法にしたがえば、鉄損低減には効果が認められるも
のの押圧により鋼板にへこみを生じ、占積率の低下を招
くという問題のあることがわかった。For example, as one of them, there is a method of obtaining a low iron loss by finishing a finish-annealed steel plate into a mirror surface by chemical polishing or electrolytic polishing. Further, Japanese Patent Publication No. 58-14851 proposes a method of obtaining a grain-oriented electrical steel sheet with ultra-low iron loss by pressing a ball-point pen-shaped small ball onto the mirror-finished steel sheet surface to introduce a minute strain. However, according to these methods, it was found that although the effect of reducing the iron loss was recognized, there was a problem in that the steel sheet was dented by the pressing and the space factor was lowered.
（発明が解決しようとする問題点） 上記のような問題点がなく、生産性、作業性、安全性、
コスト面でより有利な手段で著しく鉄損を低減させ得る
新たな低鉄損方向性けい素鋼板の製造方法を提供するこ
とが本発明の目的である。(Problems to be Solved by the Invention) There is no problem as described above, and productivity, workability, safety,
It is an object of the present invention to provide a new method for producing a low iron loss grain-oriented silicon steel sheet capable of significantly reducing iron loss by a more cost-effective means.
（問題点を解決するための手段） さて発明者らは、上記占積率の低下を招くことなく、鉄
損の低減をはかる方法につき鋭意検討した結果、本発明
を完成したものであり、その骨子とする構成は仕上焼鈍
済の方向性けい素鋼板表面を20度鏡面光沢度［GS（20）
°］が30以上となるように鏡面仕上げとなし、次いで鋼
板の圧延方向と交わる方向にプラズマ炎を放射する方法
であり、この方法の実施により著しい鉄損低減を達成で
きるのである。(Means for Solving Problems) Now, the inventors of the present invention have completed the present invention as a result of earnestly studying a method for reducing iron loss without lowering the space factor. The structure of the skeleton is as follows: The surface of grain-oriented silicon steel that has been annealed by finishing is 20 degrees specular gloss [G S (20)
[]] Is 30 or more, and the surface is mirror-finished, and then a plasma flame is radiated in a direction intersecting the rolling direction of the steel sheet. By implementing this method, a significant reduction in iron loss can be achieved.
（作用） 本発明は鏡面仕上げしてからプラズマ炎を放射する方法
に特色があるが、まず鏡面仕上げについて説明する。一
般に、表面状態を評価する方法として、表面粗さ（JIS-
B0601）が用いられているが、本発明者らの研究による
と、方向性けい素鋼板の鏡面化過程における微視的な表
面状況の相違を数値化するには、上記表面あらさでは不
適当であることが判明した。(Operation) The present invention is characterized by the method of radiating the plasma flame after the mirror finish, but the mirror finish will be described first. Generally, the surface roughness (JIS-
B0601) is used, but according to the study by the present inventors, the above surface roughness is unsuitable for quantifying the microscopic difference in the surface condition in the mirroring process of the grain-oriented silicon steel sheet. It turned out to be.
そこで、本発明者らはさらに研究をすすめたところ、JI
S-Z8741に規定されている鏡面光沢度測定方法に準拠し
入射角20°における光沢度（20度鏡面光沢度：GS（20）
°という）で表わしたものが、方向性けい素鋼板の表面
状態を表わす指標として最も適切であることがわかった
（特開昭60-89589号公報）。なおこの発明で必要とする
研摩後の鏡面は、上記20度鏡面光沢度で30以上を示すも
のをいう。以下にかかる数値限定の理由について説明す
る。Therefore, when the present inventors further researched, JI
In accordance with the specular gloss measurement method specified in S-Z8741, the gloss at an incident angle of 20 ° (20 degree specular gloss: G S (20)
It has been found that the value represented by (°) is most suitable as an index indicating the surface state of grain-oriented silicon steel sheet (Japanese Patent Laid-Open No. 60-89589). The mirror surface after polishing, which is required in the present invention, is one having a 20-degree specular gloss of 30 or more. The reason for limiting the numerical values will be described below.
第１図は、鋼板の20度鏡面光沢度と鉄損との関係を示
す。実線はプラズマ炎放射前の20度鏡面光沢度と鉄損の
関係を示し、点線はプラズマ炎放射後の20度鏡面光沢度
と鉄損の関係である。プラズマ炎は、鋼板の圧延方向と
直角に該圧延方向における間隔8mm、ノズル径0.15mm、
ガスはArガスを用いて電圧30V、電流7Aで放射した。ま
たノズルの走査速度は200mm/secである。FIG. 1 shows the relationship between the 20-degree specular gloss of a steel sheet and iron loss. The solid line shows the relationship between the 20 degree specular gloss before the plasma flame irradiation and the iron loss, and the dotted line shows the relationship between the 20 degree specular gloss after the plasma flame irradiation and the iron loss. Plasma flame has a distance of 8 mm in the rolling direction perpendicular to the rolling direction of the steel sheet, a nozzle diameter of 0.15 mm,
The gas was emitted using Ar gas at a voltage of 30 V and a current of 7 A. The scanning speed of the nozzle is 200 mm / sec.
この図より明らかなように、プラズマ炎放射が低鉄損に
対して効果を示すようになるのは20度鏡面光沢度におい
て30以上でなければならない。従って本発明においてプ
ラズマ炎放射に先立って行う鏡面仕上げの程度は20度鏡
面光沢度で30以上は必要である。As is clear from this figure, plasma flame radiation must be effective above 30 for low iron loss at 30 degrees specular gloss. Therefore, in the present invention, it is necessary that the degree of specular finish to be performed prior to the plasma flame radiation is 20 degrees specular gloss and 30 or more.
なお、本発明法を適用する鏡面化前の方向性けい素鋼板
は、通常の製造方法で得られたフオルステライト被膜を
酸洗等で除去してもよく、またグラス状被膜が形成しな
いようAl2O3などの焼鈍分離剤を塗布して仕上焼鈍に供
してもよい。The grain-oriented silicon steel sheet to which the method of the present invention is applied before mirror-finishing may be removed by acid washing or the like of the forsterite coating film obtained by a usual manufacturing method, and Al may be formed so as not to form a glass-like coating film. It is also possible to apply an annealing separator such as 2 O 3 and then subject it to finish annealing.
次に本発明方法のプロセスを具体的に説明する。Next, the process of the method of the present invention will be specifically described.
Si含有方向性けい素鋼熱延板を１回ないし中間焼鈍をは
さむ２回以上の冷間圧延により最終板厚となし、脱炭焼
鈍を行い、MgOを主成分とする焼鈍分離剤を塗布するか
或いはAl2O3を主成分とする焼鈍分離剤を塗布した後、
最終仕上げ焼鈍を行う。なおMgOを主成分とする焼鈍分
離剤を塗布した場合は、最終仕上焼鈍後の鋼板表面はフ
オルステライト被膜で覆われているので、鏡面研摩に先
だって酸洗いによって除去する必要がある。一方Al2O3
を主成分とする焼鈍分離剤を塗布した場合は最終仕上焼
鈍後の鋼板表面はグラス状被膜が形成していないのでそ
のまま鏡面研摩にまわすことができる。The final thickness of the Si-containing grain-oriented silicon steel hot-rolled sheet is cold-rolled once or twice with intermediate annealing to obtain the final thickness, decarburization-annealed, and the annealing separator containing MgO as the main component is applied. Alternatively, after applying an annealing separator containing Al 2 O 3 as a main component,
Perform final finish annealing. When the annealing separating agent containing MgO as a main component is applied, the steel sheet surface after the final finish annealing is covered with the forsterite film, so it is necessary to remove it by pickling prior to mirror polishing. On the other hand, Al 2 O 3
When the annealing separator containing as a main component is applied, since the glassy coating is not formed on the surface of the steel sheet after the final finish annealing, it can be directly subjected to mirror polishing.
上記鏡面研摩法としては、化学研摩、電解研摩等の化学
的研摩法やバフ研摩などの機械的研摩法などの従来の手
法により実施すれば良く、その手段はとくに限定される
ものではない。The above-mentioned mirror polishing method may be carried out by a conventional method such as a chemical polishing method such as chemical polishing or electrolytic polishing, or a mechanical polishing method such as buff polishing, and its means is not particularly limited.
本発明法は絶縁コーティングの有無に無関係に有効であ
るが、鋼板表面を絶縁コーティングにより処理する場合
には、処理液としては、例えば特公昭53-28375号公報に
記載されているようなコロイド状シリカ−りん酸アルミ
ニウム−無水クロム酸系のもの、あるいは特公昭56-346
33号公報に記載されているようなコロイド状シリカ−り
ん酸アルミニウム−リン酸マグネシウム系のもの、特公
昭56-52117号公報に記載されているようなコロイド状シ
リカ−りん酸マグネシウム−無水クロム酸系のもの、さ
らには低融点ガラスフリットなどの張力付与型コーティ
ングやセラミックスコーティング、無機系コーティン
グ、有機系コーティングあるいは半有機系コーティング
などがあるが、これを限定的に用いる必要はなくいずれ
を用いてもよい。The method of the present invention is effective irrespective of the presence or absence of an insulating coating. However, when treating the surface of a steel sheet with an insulating coating, the treatment liquid may be, for example, a colloidal one as described in JP-B-53-28375. Silica-aluminum phosphate-chromic anhydride system or Japanese Patent Publication No. 56-346
Of the colloidal silica-aluminum phosphate-magnesium phosphate system as described in JP-B-33, colloidal silica-magnesium phosphate-chromic anhydride as described in JP-B-56-52117. There are various types such as tension-type coatings such as low-melting glass frit, ceramics coatings, inorganic coatings, organic coatings or semi-organic coatings, but it is not necessary to limit these and use either one. Good.
次に本発明においては、鋼板表面にプラズマ炎を放射す
る。放射する方向は鋼板の圧延方向に対して60°〜90°
の角度で交差することが好適であり、この範囲外では鉄
損低減効果が減少する。また圧延方向との間隔は２〜30
mmが好適であり、その範囲外では鉄損低減効果が減少す
る。プラズマ炎を放射する鋼板面は片面、両者あるいは
表裏面に対して交互に放射してもよい。Next, in the present invention, a plasma flame is radiated on the surface of the steel sheet. The radiating direction is 60 ° to 90 ° with respect to the rolling direction of the steel sheet.
It is preferable to intersect at an angle of, and the effect of reducing iron loss decreases outside this range. The distance from the rolling direction is 2 to 30
mm is preferable, and the iron loss reducing effect is reduced outside the range. The surface of the steel plate that radiates the plasma flame may be radiated on one side, both sides or the back and front sides alternately.
（実施例） 以下に本発明法の実施例につき説明する。(Examples) Examples of the method of the present invention will be described below.
C:0.043wt％（以下は単に「％」で表示する。）、Si:3.
30％、Mn:0.07％、インヒビター形成のためにSe:0.018
％、Sb:0.023％を含有させた方向性けい素鋼熱延板を、
中間焼鈍をはさむ２回の冷間圧延にて、最終板厚0.23mm
の冷延板とした。前記冷延鋼板は次いで脱炭焼鈍し、Al
2O3を主成分とする焼鈍分離剤を塗布し乾燥した後、最
終仕上焼鈍を施した。最終仕上焼鈍後の鋼板表面にはほ
とんどグラス状被膜は形成されていなかった。C: 0.043wt% (The following is simply displayed as "%".), Si: 3.
30%, Mn: 0.07%, Se: 0.018 for inhibitor formation
%, Sb: 0.023% contained grain oriented silicon steel hot rolled sheet,
0.23mm final plate thickness after two cold rolling steps with intermediate annealing
Cold-rolled sheet. The cold rolled steel sheet is then decarburized and annealed
An annealing separator containing 2 O 3 as a main component was applied and dried, followed by final finish annealing. Almost no glassy film was formed on the surface of the steel sheet after the final finish annealing.
次に上記処理鋼板を、化学研摩して異なった20度鏡面光
沢度を有する表面の鋼板を得、その後コロイド状シリカ
−りん酸マグネシウム−無水クロム酸系の処理液を塗
布、焼付けを行い、絶縁コーティングを施した。Next, the treated steel sheet is chemically polished to obtain a steel sheet having a surface with different 20 degree specular gloss, and then a colloidal silica-magnesium phosphate-chromic anhydride treatment liquid is applied and baked to insulate. Coated.
次いで、鋼板の表面に対し、圧延方向と直角に穴径0.15
mmのプラズマトーチにて、アルゴンガスのプラズマ炎を
圧延方向に8mmの間隔で放射した。得られた製品の磁気
特性を表１に示した。Then, with respect to the surface of the steel sheet, the hole diameter was 0.15 at right angles to the rolling direction.
A plasma flame of argon gas was radiated at intervals of 8 mm in the rolling direction with a plasma torch of mm. The magnetic properties of the obtained product are shown in Table 1.
（発明の効果） 以上説明したように本発明によれば、方向性けい素鋼板
の鉄損特性の一層の改善をはかることができ、しかも占
積率の劣化もなくなった。 (Effects of the Invention) As described above, according to the present invention, it is possible to further improve the core loss characteristics of grain-oriented silicon steel sheets, and the space factor is not deteriorated.
第１図は、鋼板の20度鏡面光沢度と鉄損の関係を示す図
である。FIG. 1 is a diagram showing the relationship between the 20 ° specular gloss of a steel sheet and iron loss.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 本田 厚人 千葉県千葉市川崎町１番地 川崎製鉄株式 会社技術研究本部内 (56)参考文献 特開 昭56−105420（ＪＰ，Ａ) 特開 昭60−89523（ＪＰ，Ａ) 特開 昭56−56605（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsuto Honda Atsushi Kawasaki-cho, Chiba-shi, Chiba Inside the Technical Research Division, Kawasaki Steel Co., Ltd. (56) References JP-A-56-105420 (JP, A) JP-A-SHO 60-89523 (JP, A) JP-A-56-56605 (JP, A)
Claims (1)
度鏡面光沢度［GS（20）°］が30以上となるように鏡面
仕上げし、次いで鋼板の圧延方向と交わる方向にプラズ
マ炎を放射することを特徴とする低鉄損方向性けい素鋼
板の製造方法。1. The surface of a grain-oriented silicon steel sheet after finish annealing is
Degree specular gloss [G S (20) °] is mirror-finished to be 30 or more, and then a plasma flame is radiated in a direction intersecting with the rolling direction of the steel plate. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60291844A JPH0672264B2 (en) | 1985-12-26 | 1985-12-26 | Method for manufacturing low iron loss grain-oriented silicon steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60291844A JPH0672264B2 (en) | 1985-12-26 | 1985-12-26 | Method for manufacturing low iron loss grain-oriented silicon steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62151514A JPS62151514A (en) | 1987-07-06 |
| JPH0672264B2 true JPH0672264B2 (en) | 1994-09-14 |
Family
ID=17774147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60291844A Expired - Lifetime JPH0672264B2 (en) | 1985-12-26 | 1985-12-26 | Method for manufacturing low iron loss grain-oriented silicon steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0672264B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002081765A1 (en) * | 2001-04-05 | 2002-10-17 | Kawasaki Steel Corporation | Grain oriented electromagnetic steel sheet exhibiting extremely small watt loss and method for producing the same |
| JP6225759B2 (en) * | 2014-03-10 | 2017-11-08 | Ｊｆｅスチール株式会社 | Method for producing grain-oriented electrical steel sheet |
| RU2771036C1 (en) * | 2019-01-16 | 2022-04-25 | Ниппон Стил Корпорейшн | Isotropic electrical steel sheet |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5656605A (en) * | 1979-10-13 | 1981-05-18 | Inoue Japax Res Inc | Treatment of magnetic material |
| JPS5850297B2 (en) * | 1980-01-25 | 1983-11-09 | 新日本製鐵株式会社 | Electrical steel sheet with excellent magnetic properties |
| GB8324643D0 (en) * | 1983-09-14 | 1983-10-19 | British Steel Corp | Production of grain orientated steel |
-
1985
- 1985-12-26 JP JP60291844A patent/JPH0672264B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62151514A (en) | 1987-07-06 |
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