JP2683071B2 - Annealing method for grain-oriented silicon steel sheet - Google Patents
Annealing method for grain-oriented silicon steel sheetInfo
- Publication number
- JP2683071B2 JP2683071B2 JP31499688A JP31499688A JP2683071B2 JP 2683071 B2 JP2683071 B2 JP 2683071B2 JP 31499688 A JP31499688 A JP 31499688A JP 31499688 A JP31499688 A JP 31499688A JP 2683071 B2 JP2683071 B2 JP 2683071B2
- Authority
- JP
- Japan
- Prior art keywords
- annealing
- steel sheet
- grain
- silicon steel
- oriented silicon
- 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
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 by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
- C21D8/1283—Application of a separating or insulating coating
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)
- Chemical Treatment Of Metals (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ この本発明は方向性珪素鋼板の焼鈍方法に係わり、特
に最終仕上焼鈍前の焼鈍分離剤の塗布方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a method for annealing grain-oriented silicon steel sheets, and more particularly to a method for applying an annealing separator before final finish annealing.
＜従来の技術＞ 方向性珪素鋼板はその製造課程において、1200℃程度
の高温の最終仕上焼鈍を施されるが、その際板どおしの
固着を防ぐためおよび絶縁被膜を形成させるために、か
ならず焼鈍分離剤が塗布される。<Prior art> In the manufacturing process, grain oriented silicon steel sheet is subjected to final finishing annealing at a high temperature of about 1200 ° C, in order to prevent sticking between sheets and to form an insulating coating, An annealing separator is always applied.
焼鈍分離剤の塗布方法としては、一般に両面に均しく
塗布されるが、特開昭61−48580号公報に開示されてい
るように上面のみに塗布する場合もある。As a method for applying the annealing separator, it is generally applied evenly on both surfaces, but it may be applied only on the upper surface as disclosed in JP-A-61-48580.
しかし、両面に均しく塗布する方法は、焼鈍分離剤の
塗布量が過大となり無駄になりやすい。一方上面のみに
塗布する方法は、下片面の被膜形成が不十分となり被膜
特性が劣化する場合が多かった。However, the method of uniformly coating both surfaces tends to be wasteful because the amount of the annealing separator applied is too large. On the other hand, in the method of applying only on the upper surface, the film formation on the lower one surface was insufficient and the film characteristics were often deteriorated.
＜発明が解決しようとする課題＞ 本発明の目的は、最終仕上焼鈍時に形成される珪素鋼
表面の被膜特性の劣化を防止すると共に磁気特性の向上
をはかり、しかも焼鈍分離剤の原単位を削減することで
ある。<Problems to be Solved by the Invention> An object of the present invention is to prevent deterioration of coating properties on the surface of silicon steel formed during final finish annealing, improve magnetic properties, and reduce the basic unit of annealing separator. It is to be.
＜課題を解決するための手段＞ 本発明は、方向性珪素鋼板製造時の脱炭焼鈍後、焼鈍
分離剤を塗布する際に、片面の塗布量を他面の20〜80％
として塗布し、次いで乾燥した後、コイル状に巻き取
り、そのままの状態で最終仕上焼鈍を施すことを特徴と
する方向性珪素鋼板の焼鈍方法である。<Means for Solving the Problems> The present invention, after decarburization annealing during the production of grain-oriented silicon steel sheet, when applying an annealing separating agent, the coating amount of one surface is 20 to 80% of the other surface.
Is applied, then dried, wound into a coil, and subjected to final finishing annealing in that state, which is a method for annealing a grain-oriented silicon steel sheet.
＜作 用＞ 焼鈍分離剤を塗布後、鋼板はコイル状にされ、上下面
が密着した状態で仕上焼鈍されるため、上片面のみの焼
鈍分離剤塗布でも、ある程度のフォルステライト被膜は
形成される。しかし被膜の形成状態は不安定であった。<Operation> After the annealing separator is applied, the steel sheet is coiled and finish-annealed with the upper and lower surfaces in close contact, so even if the annealing separator is applied on only one side, a certain degree of forsterite film is formed. . However, the state of film formation was unstable.
本発明者は上片面の塗布量よりは少ない量の焼鈍分離
剤をあらかじめ下片面に塗布することにより、フォルス
テライト被膜形成の不安定化が解消され、上下面とも同
等の被膜形成が可能になることを見出した。The present inventor applies an annealing separator in an amount smaller than the coating amount on the upper one surface to the lower one surface in advance, thereby eliminating the destabilization of the forsterite film formation and enabling the same film formation on the upper and lower surfaces. I found that.
従来の焼鈍分離剤の塗布量は、両面で８〜20g/m2、す
なわち片面当たり４〜10g/m2であった。この片面塗布量
は、上下両面のフォルステライト形成には十分な量であ
る。The coating amount of a conventional annealing separator is, 8 to 20 g / m 2 on both sides, namely on one surface was per 4~10g / m 2. This one-side coating amount is a sufficient amount for forming forsterite on both upper and lower surfaces.
本発明では下片面には、上片面より少ない量の20〜80
％の焼鈍分離剤を塗布することにより、下面のフォルス
テライト被膜形成を補助し、上面に塗布した焼鈍分離剤
により完全な被膜が形成される。In the present invention, the lower side has a smaller amount of 20-80 than the upper side.
% Of the annealing separator aids the formation of a forsterite coating on the lower surface and the annealing separator applied on the upper surface forms a complete coating.
また焼鈍分離剤塗布量を減少させることにより、フォ
ルステライト膜厚が薄くなり、よって占積率が向上し磁
気特性が向上する。Further, by reducing the coating amount of the annealing separator, the film thickness of the forsterite is reduced, so that the space factor is improved and the magnetic characteristics are improved.
次に片面の塗布量を他面の20〜80％に限定した理由を
述べる。Next, the reason why the coating amount on one surface is limited to 20 to 80% of the other surface will be described.
第３図は上面に6.0g/m2、下面に上面の塗布量の０〜1
00％に水準を変えてMgOを主成分とする焼鈍分離剤を塗
布し、最終仕上焼鈍を施した後の被膜の剥離試験を行い
30φ以上の合格率を示したものである。なお、剥離試験
は次のように行い、合否の判定をした。Fig. 3 shows 6.0 g / m 2 on the upper surface and 0 to 1 of the coating amount on the lower surface.
After changing the level to 00%, an annealing separator containing MgO as the main component was applied, and after the final finish annealing, a film peeling test was performed.
It shows the pass rate of 30φ or more. The peeling test was performed as follows, and the pass / fail judgment was made.
鋼板を30φの丸棒に巻きつけ、巻きつけた部分の被膜
が剥離していなければ合格、剥離すれば不合格とした。The steel plate was wrapped around a 30φ round bar, and passed if the coating on the wound portion did not peel off, and rejected if peeled off.
これによると、20％未満では剥離が多く、また80％超
では剥離に対する効果は飽和し、また原単位削減効果も
小さくなる。従って本発明では片面の塗布量を他面の20
〜80％と限定する。According to this, if it is less than 20%, there is a large amount of peeling, and if it exceeds 80%, the effect on peeling is saturated and the effect of reducing the basic unit becomes small. Therefore, in the present invention, the coating amount on one side is set to 20 on the other side.
Limited to ~ 80%.
なお、前述の例では、塗布ラインが水平である場合、
下面塗布は上向きで重力に逆らう構成にあるため、下片
面の塗布量を上片面の塗布量より少ない例を挙げたが、
これを逆にしても同じ効果が得られることはもちろんで
ある。In the above example, if the coating line is horizontal,
Since the bottom surface coating is upward and is against gravity, an example in which the coating amount on the lower one surface is smaller than the coating amount on the upper one surface was given.
Of course, the same effect can be obtained by reversing this.
＜実施例＞ 鋼板上片面に6.0g/m2,下片面に2.0g/m2の焼鈍分離剤
を塗布し、仕上焼鈍を行った。比較材としては上下両面
にそれぞれ6.0g/m2の焼鈍分離剤を塗布したものを用い
た。板厚は0.23mmである。<Examples> 6.0 g / m 2 was applied to the upper surface of the steel sheet and 2.0 g / m 2 was applied to the lower surface of the steel sheet, and finish annealing was performed. As a comparative material, a material having 6.0 g / m 2 of an annealing separator applied on both upper and lower surfaces was used. The plate thickness is 0.23 mm.
第１図に被膜特性として剥離試験結果を示した。本発
明の下片面の塗布量を減少させた材料は、従来の上下両
面にそれぞれ6.0g/m2塗布した材料と変わらず同等であ
った。FIG. 1 shows the results of the peeling test as film characteristics. The material of which the coating amount on the lower one surface of the present invention was reduced was the same as the conventional material coated on both upper and lower surfaces at 6.0 g / m 2 .
第２図には磁気特性を比較して示した。本発明の下片
面の塗布量を減少させた材料の方が鉄損が低い。これは
フォルステライト被膜が薄くなり、占積率向上の効果と
考えられる。FIG. 2 shows the magnetic characteristics for comparison. The core loss of the material of the present invention whose coating amount on one lower surface is reduced is lower. This is considered to be an effect of improving the space factor by thinning the forsterite coating.
＜発明の効果＞ 本発明によれば、仕上焼鈍前に鋼板表面に塗布する焼
鈍分離剤の量を片面を他面より減少させることにより、
被膜特性は従来と同等で、磁気特性の優れた材料を製造
することができ、かつ焼鈍分離剤原単位を削減できる効
果がある。<Effect of the Invention> According to the present invention, by reducing the amount of the annealing separator applied to the surface of the steel sheet before finish annealing from one surface to the other surface,
The coating properties are the same as those of conventional ones, and it is possible to manufacture a material having excellent magnetic properties and to reduce the annealing separator basic unit.
第１図は被膜の剥離試験結果を示すグラフ、第２図は下
片面塗布量減少材と比較材との磁気特性の比較を示すグ
ラフ、第３図は下片面塗布量の上片面塗布量に対する割
合と30φ剥離試験合格率との関係を示すグラフである。FIG. 1 is a graph showing the results of the peeling test of the coating, FIG. 2 is a graph showing the comparison of the magnetic properties of the lower one-sided coating amount reducing material and the comparative material, and FIG. 3 is the lower one-sided coating amount versus the upper one-side coating amount. It is a graph which shows the relationship between a ratio and a 30φ peeling test passing rate.
Claims (1)
分離剤を塗布する際に、片面の塗布量を他面の20〜80％
として塗布し、次いで乾燥した後、コイル状に巻き取
り、そのままの状態で最終仕上焼鈍を施すことを特徴と
する方向性珪素鋼板の焼鈍方法。1. When applying an annealing separating agent after decarburization annealing in the production of grain-oriented silicon steel sheet, the coating amount on one surface is 20 to 80% of that on the other surface.
The method for annealing a grain-oriented silicon steel sheet is characterized in that after being applied as above, it is then dried, wound into a coil, and subjected to final finishing annealing as it is.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31499688A JP2683071B2 (en) | 1988-12-15 | 1988-12-15 | Annealing method for grain-oriented silicon steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31499688A JP2683071B2 (en) | 1988-12-15 | 1988-12-15 | Annealing method for grain-oriented silicon steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02163381A JPH02163381A (en) | 1990-06-22 |
| JP2683071B2 true JP2683071B2 (en) | 1997-11-26 |
Family
ID=18060155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31499688A Expired - Fee Related JP2683071B2 (en) | 1988-12-15 | 1988-12-15 | Annealing method for grain-oriented silicon steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2683071B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101253857B1 (en) * | 2010-12-27 | 2013-04-12 | 주식회사 포스코 | Insulation coating method of electrical steel sheet |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR112013001358B1 (en) * | 2010-08-06 | 2019-07-02 | Jfe Steel Corporation | ORIENTED GRAIN ELECTRIC STEEL SHEET AND METHOD FOR MANUFACTURING THEM |
| JP5593942B2 (en) * | 2010-08-06 | 2014-09-24 | Ｊｆｅスチール株式会社 | Oriented electrical steel sheet and manufacturing method thereof |
-
1988
- 1988-12-15 JP JP31499688A patent/JP2683071B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101253857B1 (en) * | 2010-12-27 | 2013-04-12 | 주식회사 포스코 | Insulation coating method of electrical steel sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02163381A (en) | 1990-06-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |