JPH08930B2 - Non-oriented electrical steel sheet manufacturing method - Google Patents
Non-oriented electrical steel sheet manufacturing methodInfo
- Publication number
- JPH08930B2 JPH08930B2 JP61169685A JP16968586A JPH08930B2 JP H08930 B2 JPH08930 B2 JP H08930B2 JP 61169685 A JP61169685 A JP 61169685A JP 16968586 A JP16968586 A JP 16968586A JP H08930 B2 JPH08930 B2 JP H08930B2
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- steel sheet
- electrical steel
- oriented electrical
- dull
- 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
Landscapes
- 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、電磁特性の良好な無方向性電磁鋼板の製造
方法に関するものである。The present invention relates to a method for producing a non-oriented electrical steel sheet having good electromagnetic characteristics.
一般に、需要家での作業性を考慮した鋼板としてダル
となっている電磁鋼板が重要視されている。Generally, a magnetic steel sheet having a dull shape is regarded as important as a steel sheet in consideration of workability at customers.
また、電磁鋼板は打抜後、積層して使用するが、積層
後、端面を溶接する作業を行うために、打抜性、溶接性
のいずれも優れたものが要求される。Further, the electromagnetic steel sheets are used after being punched and laminated, but since the work of welding the end faces after the lamination is performed, it is required to have excellent punchability and weldability.
そこで従来、特公昭49-6744号公報に示されるように
ダルロール圧延を行い、さらに、半有機質を含むコーテ
ィングを塗布し、製品板面粗度Ra≧0.5μｍ以上とする
打抜性と溶接性の優れた電磁鋼板が提案された。Therefore, conventionally, as shown in Japanese Patent Publication No. Sho 49-6744, dull roll rolling is performed, and a coating containing a semi-organic material is further applied to achieve punching property and weldability of the product plate surface roughness Ra ≧ 0.5 μm or more. Excellent electrical steel sheets have been proposed.
また、需要家で打抜後、焼鈍時に密着することを防止
するために、コーティングなしで板面ダルのみとしてい
る電磁鋼板も製造されている。In addition, in order to prevent sticking at the time of annealing after punching by a consumer, there is also manufactured an electromagnetic steel sheet having only a plate surface dull without coating.
しかし、最近では作業性だけでなく、電磁特性も良好
な電磁鋼板が要求されており、１回目の冷間圧延後に中
間焼鈍を行い、さらに、２回目の冷間圧延を行う方法が
採用されている。However, recently, a magnetic steel sheet having not only good workability but also good electromagnetic characteristics is required, and a method of performing intermediate annealing after the first cold rolling and further performing the second cold rolling is adopted. There is.
この方法では２回目の冷間圧下率が電磁特性に大きく
影響を与えるが、２回目の冷間圧延時におけるダルロー
ル圧延とブライトロール圧延の間に大幅な電磁特性差が
ある。In this method, the second cold rolling greatly affects the electromagnetic characteristics, but there is a large electromagnetic characteristic difference between the dull roll rolling and the bright roll rolling during the second cold rolling.
すなわち、ダル目をつけるためには必ずダルロール圧
延が必要であるが、２回目の冷間圧延時に全圧下をダル
ロール圧延した場合に、全圧下をブライトロール圧延し
た場合より、大幅に電磁特性が劣化するという問題点が
あった。That is, in order to make dullness, dull roll rolling is always necessary, but when the total reduction is dull roll rolled during the second cold rolling, the electromagnetic characteristics are significantly deteriorated as compared with the case of bright roll rolling. There was a problem to do.
本発明は上述の問題点を解決するために提案されたも
ので、２回目の冷間圧延時にダルロール圧延した場合に
も電磁特性が劣化しない無方向性電磁鋼板の製造方法を
提供することを目的とする。The present invention has been proposed to solve the above problems, and an object of the present invention is to provide a method for manufacturing a non-oriented electrical steel sheet in which electromagnetic characteristics do not deteriorate even when dull roll rolling is performed during the second cold rolling. And
本発明は、中間焼鈍工程の上流および下流で２回の冷
間圧延を行うことにより仕上厚みを形成する無方向性電
磁鋼板の製造方法を改良するもので、 該中間焼鈍工程の下流での２回目の冷間圧延を２パス
以上の圧延となし、その前半でブライトロール圧延を行
い、後半で圧下率１％以上５％以下のダルロール圧延を
行うことを特徴とする無方向性電磁鋼板の製造方法であ
る。The present invention improves a method for producing a non-oriented electrical steel sheet in which a finished thickness is formed by performing cold rolling twice at the upstream side and the downstream side of the intermediate annealing step. Manufacture of non-oriented electrical steel sheet characterized in that the cold rolling of the second time is performed in two or more passes, bright roll rolling is performed in the first half, and dull roll rolling with a reduction rate of 1% or more and 5% or less is performed in the latter half. Is the way.
本発明によると、ダルロール圧延の圧下率を１％以上
５％以下に限定することにより集合組織の悪化を防止し
て、板面表面に凹凸を形成する。According to the present invention, the reduction rate of dull roll rolling is limited to 1% or more and 5% or less to prevent the deterioration of the texture and form the unevenness on the plate surface.
すなわち、中間焼鈍工程の下流での２回目の冷間圧延
を２パス以上の圧延とし、その前半でブライトロール圧
延を行うことにより冷間圧下率を取り、後半で圧下率１
％以上５％以下のダルロール圧延を行う。That is, the second cold rolling downstream of the intermediate annealing step is a rolling of two passes or more, and the bright rolling is performed in the first half to obtain the cold rolling reduction, and in the latter half, the rolling reduction is 1
% Or more and 5% or less by dull roll rolling.
このため、粗度を確保し、かつ、電磁特性を劣化させ
ることなしにダル目を持つ電磁鋼板を得ることができ
る。For this reason, it is possible to obtain a magnetic steel sheet having dullness, while ensuring the roughness and without deteriorating the electromagnetic characteristics.
以下、本発明を図面を参照してその実施例に基づいて
説明する。Hereinafter, the present invention will be described based on its embodiments with reference to the drawings.
第１図は、Siを0.1％を含む無方向性電磁鋼板を１回
目の冷間圧延、中間焼鈍後、２回目の冷間圧延後にブラ
イトロール（ロール粗度Ra≒0.3μｍ）とダルロール
（ロール粗度≒３μｍ）による圧下率の組合せを変えて
0.50mmに仕上圧延した材料を750℃で２時間で窒素中で
焼鈍した後の電磁特性を示す。Fig. 1 shows a non-oriented electrical steel sheet containing 0.1% Si after cold rolling and intermediate annealing for the first time, and after the second cold rolling, bright rolls (roll roughness Ra ≒ 0.3μm) and dull rolls (rolls). Change the combination of rolling reductions according to roughness ≈ 3 μm)
The electromagnetic characteristics are shown after the material finish-rolled to 0.50 mm is annealed in nitrogen at 750 ° C. for 2 hours.
これによると、２回目の冷間圧延時、ダルロールでの
圧下率が小さくなるほど電磁特性が良いことが分り、ダ
ルロール圧延による冷間圧下率が５％以下であれば効果
が十分出ることが分る。According to this, it can be seen that at the time of the second cold rolling, the smaller the rolling reduction on the dull roll, the better the electromagnetic characteristics, and that the effect is sufficiently obtained if the cold rolling reduction by the dull roll rolling is 5% or less. .
ただし、板の粗度を確保するには、圧下率３％以下の
ダルロール圧延でも十分可能であり、粗度が確保できる
範囲でダルロール圧延による圧下率は極力少なくする方
法が好ましい。However, in order to secure the roughness of the plate, dull roll rolling with a rolling reduction of 3% or less is sufficient, and it is preferable to reduce the rolling reduction by dull roll rolling as much as possible within the range in which the roughness can be secured.
第２図はSiを0.5％を含む無方向性電磁鋼板を、１回
目の冷間圧延、中間焼鈍後、２回目の冷間圧延時にブラ
イトロール（ロール粗度Ra≒0.3μｍ）とダルロール
（ロール粗度Ra＝4.5μｍ）による圧下率の組合せを変
えて0.50mmに仕上圧延し、鋼板表面にクロム酸系と有機
樹脂の混合皮膜を片面2g/m2付着させた材料を750℃で２
時間窒素中で歪取焼鈍を行った後の電磁特性を示したも
のである。Fig. 2 shows a non-oriented electrical steel sheet containing 0.5% Si, which was bright rolled (roll roughness Ra ≒ 0.3μm) and dull roll (roll) after the first cold rolling and intermediate annealing. Roughness Ra = 4.5μm) The finish rolling was changed to 0.50mm by changing the combination of the reduction ratios, and the mixed coating of chromic acid type and organic resin was applied to the surface of the steel sheet at 2g / m 2 on one side.
It shows the electromagnetic characteristics after performing stress relief annealing in nitrogen for a period of time.
ダルロールでの圧下率が低い方が電磁特性の良好であ
るが、ダルロール圧下率１％未満では製品粗度がRa≒0.
5μｍより小さく打抜後の溶接性に問題が生じる。The lower the rolling rate of dull roll is, the better the electromagnetic characteristics are. However, if the rolling rate of dull roll is less than 1%, the product roughness is Ra≈0.
If it is smaller than 5 μm, a problem occurs in weldability after punching.
すなわちダルロール圧下率には下限値が存在し、この
材料ではダルロール圧下率を１％以上とする必要があ
る。That is, there is a lower limit value for the dull roll reduction ratio, and it is necessary to set the dull roll reduction ratio to 1% or more for this material.
本発明は以上説明したように、ダルロール圧延による
電磁特性の劣化を最少限にすることができるので、需要
家での作業性を確保しながら、良好な電磁特性をもつ電
磁鋼板の製造が可能となるという効果を奏する。INDUSTRIAL APPLICABILITY As described above, the present invention can minimize the deterioration of the electromagnetic characteristics due to the dull roll rolling, so that it is possible to manufacture the electromagnetic steel sheet having good electromagnetic characteristics while ensuring the workability in the customer. Has the effect of becoming.
第１図は本発明の一実施例方法による電磁特性図、第２
図は本発明の他の実施例方法による電磁特性図である。FIG. 1 is an electromagnetic characteristic diagram according to an embodiment method of the present invention, and FIG.
The figure is an electromagnetic characteristic diagram according to another embodiment of the present invention.
Claims (1)
間圧延を行うことにより仕上厚みを形成する無方向性電
磁鋼板の製造方法において、 該中間焼鈍工程の下流での２回目の冷間圧延を２パス以
上の圧延となし、その前半でブライトロール圧延を行
い、後半で圧下率１％以上５％以下のダルロール圧延を
行うことを特徴とする無方向性電磁鋼板の製造方法。1. A method of manufacturing a non-oriented electrical steel sheet, wherein a finished thickness is formed by performing cold rolling twice upstream and downstream of an intermediate annealing step, wherein a second cold cooling is performed downstream of the intermediate annealing step. A method for producing a non-oriented electrical steel sheet, characterized in that hot rolling is performed in two or more passes, bright roll rolling is performed in the first half, and dull roll rolling with a reduction rate of 1% or more and 5% or less is performed in the latter half.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61169685A JPH08930B2 (en) | 1986-07-21 | 1986-07-21 | Non-oriented electrical steel sheet manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61169685A JPH08930B2 (en) | 1986-07-21 | 1986-07-21 | Non-oriented electrical steel sheet manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6326313A JPS6326313A (en) | 1988-02-03 |
| JPH08930B2 true JPH08930B2 (en) | 1996-01-10 |
Family
ID=15891003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61169685A Expired - Fee Related JPH08930B2 (en) | 1986-07-21 | 1986-07-21 | Non-oriented electrical steel sheet manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08930B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996001191A1 (en) * | 1994-07-05 | 1996-01-18 | Asc Incorporated | Sunshade for an automotive vehicle roof |
-
1986
- 1986-07-21 JP JP61169685A patent/JPH08930B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6326313A (en) | 1988-02-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |