JPH0680170B2 - Method for manufacturing semi-processed electrical steel sheet with excellent circumferential magnetic properties - Google Patents
Method for manufacturing semi-processed electrical steel sheet with excellent circumferential magnetic propertiesInfo
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- JPH0680170B2 JPH0680170B2 JP62154289A JP15428987A JPH0680170B2 JP H0680170 B2 JPH0680170 B2 JP H0680170B2 JP 62154289 A JP62154289 A JP 62154289A JP 15428987 A JP15428987 A JP 15428987A JP H0680170 B2 JPH0680170 B2 JP H0680170B2
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- steel sheet
- magnetic properties
- rolling
- electrical steel
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Description
【発明の詳細な説明】 (産業上の利用分野) この発明は、小型モーター等の鉄心材料としての用途に
用いて好適な円周方向の磁気特性に優れたセミプロセス
電磁鋼板の有利な製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is an advantageous method for producing a semi-processed electromagnetic steel sheet having excellent magnetic properties in the circumferential direction, which is suitable for use as an iron core material for small motors and the like. It is about.
(従来の技術) セミプロセス電磁鋼板は、主として、小型のモーター
や、蛍光灯用小型安定器、小型トランス等の鉄心材料と
して用いられるが、近年のエネルギー事情を反映して低
鉄損、高透磁率の要求が高まってきている。(Prior Art) Semi-processed electrical steel sheets are mainly used as iron core materials for small motors, small ballasts for fluorescent lights, small transformers, etc. The demand for magnetic susceptibility is increasing.
上記した電気機器のうち、小型安定器や小型トランスの
ように、磁束が材料の圧延方向に主として流れるような
ものにおいては、異方性が強く、圧延方向に良好な磁気
特性を示すものが好ましい。Among the above-mentioned electric devices, in small ballasts and small transformers in which magnetic flux mainly flows in the rolling direction of the material, those having strong anisotropy and exhibiting good magnetic characteristics in the rolling direction are preferable. .
一方、モーター等の回転機の場合には、磁気特性として
異方性の小さいものが好ましく、円周方向の磁気特性に
優れたものが必要とされる。On the other hand, in the case of a rotating machine such as a motor, those having small anisotropy in magnetic properties are preferable, and those having excellent magnetic properties in the circumferential direction are required.
かような回転機用鉄心材料としては、たとえば特公昭51
-942号公報において、{100}<OVW>集合組織を持つ面
内無方向性磁気鋼板が提案されている。Examples of such iron core materials for rotating machines include Japanese Patent Publication No.
No. 942, an in-plane non-oriented magnetic steel sheet having a {100} <OVW> texture is proposed.
(発明が解決しようとする問題点) しかしながら上記の鋼板においては、その製造に当っ
て、熱延板厚みを2.0mm〜5.0mmとしかつ冷延圧下率を85
%以上と大きくとらねばならないため、冷間圧延性が非
常に悪くなる。またこのような圧下率や、熱延板厚など
の制約から、必然的に製品厚が0.35mm以下に限られてし
まうという欠点があった。(Problems to be solved by the invention) However, in the production of the above steel sheet, the thickness of the hot rolled sheet is set to 2.0 mm to 5.0 mm and the cold rolling reduction is set to 85 mm.
%, The cold rolling property becomes extremely poor. Further, there is a drawback that the product thickness is necessarily limited to 0.35 mm or less due to the restrictions such as the rolling reduction and the thickness of the hot rolled sheet.
この発明は、上記の問題を有利に解決するもので、圧下
率や熱延板厚などの制約なしに容易かつ簡便に円周方向
の磁気特性に優れたセミプロセス電磁鋼板を得ることが
できる有利な製造方法を提案することを目的とする。The present invention advantageously solves the above problems, and can easily and easily obtain a semi-processed electromagnetic steel sheet having excellent magnetic properties in the circumferential direction without restrictions such as reduction rate and hot rolled sheet thickness. The purpose is to propose a new manufacturing method.
なお従来、電磁鋼板の特性評価は主として、28cm×3cm
のエプスタインサイズの試料を圧延方向および圧延方向
と直角方向からそれぞれ半数ずつ採取し、測定・評価を
行っていたが、この方法では圧延方向および圧延方向と
直角方向の磁気特性は評価できるものの、モーター等の
回転機で必要とされる円周方向の磁気特性についての情
報は正確には得られないという欠点があった。Conventionally, the characteristic evaluation of electrical steel sheets is mainly 28 cm x 3 cm.
Although half of the Epstein-sized samples from the rolling direction and the direction perpendicular to the rolling direction were sampled and measured and evaluated, this method can evaluate the magnetic properties in the rolling direction and the direction perpendicular to the rolling direction. However, there is a drawback in that the information about the magnetic properties in the circumferential direction, which is required in the rotating machine such as the above, cannot be obtained accurately.
この発明は、上記の点についても検討を加え、冷延性に
おいて安定して生産でき、種々の製品厚に対応できるこ
とを目指した。またモーター等の回転機用鉄心材料をよ
り正当に評価する方法としてリング試片を用いた円周方
向の磁気特性評価法を採用した。The present invention has made further studies on the above points, and aims to be able to stably produce cold-rolling properties and to cope with various product thicknesses. In addition, we adopted a magnetic property evaluation method in the circumferential direction using a ring sample as a method for more properly evaluating iron core materials for rotating machines such as motors.
(問題点を解決するための手段) まずこの発明の解明経緯について説明する。(Means for Solving Problems) First, the process of clarifying the present invention will be described.
従来、冷間圧延鋼板の鋼板表面に粗度を付与する方法と
しては、ロール表面を研削したり、剛砂、剛球を投射し
てロール表面の粗度を制御し、圧延によって、これを鋼
板に転写する手法であった。従ってここで付与される鋼
板表面の粗度は、必然的に無秩序なものであり、いかな
る規則性もない。Conventionally, as a method of imparting roughness to the steel plate surface of the cold rolled steel plate, grinding the roll surface, or controlling the roughness of the roll surface by projecting hard sand or hard spheres, and rolling this into a steel plate. It was a method of transcription. Therefore, the roughness of the steel sheet surface given here is inevitably disordered and does not have any regularity.
この点につき、発明者らは種々検討を重ねたところ、鋼
板に転写される凹凸の規則性が鋼板の円周方向の磁気特
性に大きな影響を与えることを発見した。With respect to this point, the inventors have made various studies and found that the regularity of the irregularities transferred to the steel sheet greatly affects the magnetic properties in the circumferential direction of the steel sheet.
すなわち、鋼板に転写される凹凸の形状が好ましくは円
または楕円の場合でかつ、ある特定大きさのものが重な
ることなく規則的に配列している場合に、鋼板の円周方
向の磁気特性が良好となることを見出し、かかる知見に
基いてこの発明を完成させたのである。That is, when the shape of the irregularities transferred to the steel sheet is preferably a circle or an ellipse and when those of a certain specific size are regularly arranged without overlapping, the magnetic characteristics in the circumferential direction of the steel sheet are The inventors have found that it is good, and have completed the present invention based on this finding.
すなわちこの発明は、C:0.010wt%(以下単に%で示
す)以下、Si:0.1〜1.0%、Mn:0.5〜1.5%およびAl:0.1
〜0.6%を含む組成になる熱延板を、冷間圧延したの
ち、焼鈍し、ついでスキンパス圧延を施す一連の工程に
よってセミプロセス電磁鋼板を製造するに当り、上記ス
キンパス圧延工程において、圧延ロールとして、ロール
表面に、円換算直径が200μm以下でかつ最凸部と最凹
部との差が5〜40μmの形状になるクレーターを、単位
面積1cm2当りの個数が1000個以上でしかもそれらが互
いに重畳することなく配列させたロールを用いることか
ら成る、円周方向の磁気特性に優れたセミプロセス電磁
鋼板の製造方法である。That is, the present invention is C: 0.010 wt% (hereinafter simply referred to as%) or less, Si: 0.1 to 1.0%, Mn: 0.5 to 1.5% and Al: 0.1
In producing a semi-processed electromagnetic steel sheet by a series of steps of cold rolling a hot rolled sheet having a composition containing ~ 0.6%, annealing, and then skin pass rolling, in the skin pass rolling step, as a rolling roll, , Craters with a circle equivalent diameter of 200 μm or less and a difference between the most convex part and the most concave part of 5 to 40 μm on the roll surface, the number of craters per unit area 1 cm 2 is 1000 or more, and they overlap each other. It is a method for producing a semi-processed electromagnetic steel sheet having excellent magnetic properties in the circumferential direction, which comprises using rolls arranged without doing so.
以下この発明を具体的に説明する。The present invention will be specifically described below.
まずこの発明において素材の主要成分を上記の範囲に限
定した理由について説明する。First, the reason why the main component of the raw material is limited to the above range in the present invention will be described.
C:0.010%以下 Cは、鉄損、透磁率を共に劣化させる元素であるので極
力低減させることが好ましいが、0.010%以下の範囲で
許容できる。C: 0.010% or less C is an element that deteriorates both iron loss and magnetic permeability, so it is preferable to reduce it as much as possible, but it is allowable within the range of 0.010% or less.
Si:0.1〜1.0% Siは、固有抵抗を高めうず電流損を低減させるために0.
1%以上は必要であるが、1.0%を超えると透磁率を劣化
させるので、0.1〜1.0の範囲に限定した。Si: 0.1-1.0% Si is 0.1% to increase specific resistance and reduce eddy current loss.
1% or more is necessary, but if it exceeds 1.0%, the magnetic permeability deteriorates, so the range was limited to 0.1 to 1.0.
Mn:0.5〜1.5% Mnも固有抵抗を高めるために0.5%以上必要であるが、
1.5%を超えると粒成長性が悪くなり、磁気特性が劣化
するので、0.5〜1.5%の範囲に限定した。Mn: 0.5-1.5% Mn also needs 0.5% or more to increase the specific resistance,
If it exceeds 1.5%, the grain growth property deteriorates and the magnetic properties deteriorate, so the range was limited to 0.5 to 1.5%.
Al:0.1〜0.6% AlもSiやMnと同様固有抵抗を高めるために0.1%以上必
要であるが0.6%を超えると透磁率を劣化させるので、
0.1〜0.6%の範囲で含有させるものとした。Al: 0.1-0.6% Al, like Si and Mn, needs 0.1% or more to increase the specific resistance, but if it exceeds 0.6%, the magnetic permeability deteriorates,
It was made to contain in the range of 0.1-0.6%.
以上、必須成分について説明したが、この発明ではその
他、SbやSn等の表面酸窒化防止剤やCu,Ni等の固有抵抗
向上元素などを添加しても差し支えない。Although the essential components have been described above, other surface oxynitriding inhibitors such as Sb and Sn and specific resistance improving elements such as Cu and Ni may be added to the present invention.
さて上記の好適成分組成に調整した熱延板を、そのまま
又は必要に応じて700℃以上程度の温度で焼鈍したの
ち、冷間圧延についで600℃以上程度の温度で焼鈍した
のち、3〜10%程度の圧下率でスキンパス圧延を施して
製品とするわけであるが、この発明では、上記スキンパ
ス圧延工程がとりわけ重要である。Now, the hot-rolled sheet adjusted to the above-mentioned preferred component composition is annealed as it is or at a temperature of about 700 ° C. or more, if necessary, and then cold-rolled, then annealed at a temperature of about 600 ° C. or more, then 3 to 10 The product is obtained by subjecting the product to a skin pass rolling at a rolling reduction of about%. In the present invention, the skin pass rolling step is particularly important.
第1図に、この発明で使用するスキンパスロールの局所
表面の断面を模式で示し、該表面に形成したクレーター
の円換算直径をD(μm)で、また最凸部と最凹部との
差をH(μm)で、そして、ロール表面1cm2当りのク
レーター数をN(個)で表わすものとする。FIG. 1 schematically shows a cross section of the local surface of the skin pass roll used in the present invention, the circle equivalent diameter of the crater formed on the surface is D (μm), and the difference between the most convex part and the most concave part is Let H (μm) and the number of craters per cm 2 of the roll surface be N (pieces).
第2図に、平均値でD=100μm、H=20μmの場合に
おける、クレーター数Nと鋼板円周方向の透磁率μ1.5
との関係を示す。FIG. 2 shows the number of craters N and the magnetic permeability μ 1.5 in the circumferential direction of the steel plate when D = 100 μm and H = 20 μm on average.
Shows the relationship with.
なお上記のクレーターは、レーザー加工により形成した
もので、ロール周方向および軸方向に等間隔に2次元結
晶格子状に規則的に配列されている。The craters are formed by laser processing, and are regularly arranged in a two-dimensional crystal lattice pattern at equal intervals in the roll circumferential direction and the axial direction.
また供試材は、C:0.004%、Si:0.5%、Mn:1.10%および
Al:0.2%を含有し、残部実質的にFeの組成になる熱延板
を、0.53mm厚まで冷間圧延したのち、800℃で焼鈍し、
ついで5%の圧下率でスキンパス圧延したもので、かか
る圧延板を、外径:100mm、内径:50mmのリング試片に打
抜き、N2雰囲気中で750℃、2hの歪取り焼鈍を行ったの
ち、透磁率の測定を行った。The test materials are C: 0.004%, Si: 0.5%, Mn: 1.10% and
A hot-rolled sheet containing Al: 0.2% and the balance of which is substantially Fe is cold-rolled to a thickness of 0.53 mm, and then annealed at 800 ° C.
Then, it was skin-pass rolled at a reduction rate of 5%, and the rolled plate was punched into a ring test piece having an outer diameter of 100 mm and an inner diameter of 50 mm, and then subjected to strain relief annealing at 750 ° C. for 2 hours in an N 2 atmosphere. The magnetic permeability was measured.
第2図より明らかなように、N数が増すに従って円周方
向の透磁率μ1.5は向上し、とくにN≧1000の範囲で優
れた透磁率が得られている。As is clear from FIG. 2, the magnetic permeability μ 1.5 in the circumferential direction increases as the N number increases, and particularly excellent magnetic permeability is obtained in the range of N ≧ 1000.
次に第3図に、クレーター個数Nは1600と一定にし、ク
レーターの円換算直径Dおよび最凸部と最凹部との差H
を種々に変化させたときのμ1.5について調べた結果
を、整理して示す。Next, in FIG. 3, the number of craters N is kept constant at 1600, the crater equivalent diameter D and the difference H between the most convex portion and the most concave portion H.
The results obtained by examining μ 1.5 when various values are changed are summarized and shown.
同図より明らかなように、D≦200μmでかつH=5〜4
0μmの範囲において、とりわけ良好なμ1.5が得られて
いる。As is clear from the figure, D ≦ 200 μm and H = 5-4
Particularly good μ 1.5 is obtained in the range of 0 μm.
従ってこの発明では、スキンパス圧延用ロールの表面に
形成すべきクレーターにつき、D≦200μm、H=5〜4
0μm、N≧1000個の範囲に限定したのである。なお実
際のクレーター形成においては、Dを30μm未満にする
のは非常に難しいので、30μm以上とするのが実際的で
ある。Therefore, according to the present invention, for the crater to be formed on the surface of the skin pass rolling roll, D ≦ 200 μm, H = 5 to 4
The range is 0 μm and N ≧ 1000. In actual crater formation, it is very difficult to make D less than 30 μm, so it is practical to set D to 30 μm or more.
第4図a〜iに、クレーター配列の好適例を模式で示
す。クレーター形状はほぼ同一でかつ配列の周期性はロ
ール周方向および軸方向の間隔が一定であることが好ま
しいけれども、多少であれば周期性が乱れていたり(同
図h)、大きさが不揃い(同図i)であってもよい。A suitable example of the crater sequence is schematically shown in FIGS. Although it is preferable that the crater shapes are almost the same and the periodicity of the arrangement is constant in the circumferential and axial directions of the roll, the periodicity may be disturbed to some extent (h in the same figure), or the sizes are not uniform ( It may be i) in FIG.
なおこの発明に従うダルロールを作成するに当っては、
レーザ光線やプラズマ炎がとりわけ有利に適合する。In making the dull roll according to the present invention,
Laser beams and plasma flames are particularly well suited.
(実施例) 実施例1 C:0.0050%、Si:0.52%、Mn:0.80%、Al:0.28%、Sb:0.
05%、P:0.05%およびS:0.003%を含み、残部は実質的
にFeの組成になる2.3mm厚の熱延板を、冷間圧延して0.5
3mm厚としたのち、N2雰囲気中で770℃、1minの連続焼鈍
を施し、ついでスキンパス圧延により0.50mm厚に仕上げ
た。(Example) Example 1 C: 0.0050%, Si: 0.52%, Mn: 0.80%, Al: 0.28%, Sb: 0.
A hot rolled sheet of 2.3mm thickness containing 05%, P: 0.05% and S: 0.003%, the balance of which is substantially Fe composition, is cold rolled to 0.5
After having a thickness of 3 mm, continuous annealing was performed at 770 ° C. for 1 min in a N 2 atmosphere, and then skin pass rolling was performed to a thickness of 0.50 mm.
このスキンパス圧延において、表1に示したように、ク
レーターの円換算直径D、最凸部と最凹部との差Hおよ
び個数Nを種々に変化させたロールを用いて圧延した。
なおクレーターの配列は第4図aに示した模様とした。In this skin pass rolling, as shown in Table 1, rolling was performed using rolls in which the circle-converted diameter D of the crater, the difference H between the most convex portion and the most concave portion, and the number N were variously changed.
The crater arrangement was the pattern shown in Fig. 4a.
かくして得られた各冷延板から、外径:100mm、内径:50m
mのリング状試料を切り出し、N2雰囲気中で750℃、2hの
歪取り焼鈍を施してから、透磁率および鉄損について調
べた結果を、表1に併記する。From each cold-rolled sheet thus obtained, outer diameter: 100 mm, inner diameter: 50 m
A ring-shaped sample of m is cut out, subjected to strain relief annealing at 750 ° C. for 2 hours in an N 2 atmosphere, and then the results of examining the magnetic permeability and the iron loss are also shown in Table 1.
また表1には、比較のため、通常のブライトロールおよ
び中心線平均粗さがそれぞれRa=2.0,3.0,4.0μmのシ
ョットブラストダルロールを用いた場合についての調査
結果も併せて示した。For comparison, Table 1 also shows the results of investigations in the case of using a normal bright roll and a shot blast dull roll having center line average roughness R a = 2.0, 3.0, and 4.0 μm, respectively.
同表より明らかなように、D,HおよびNがいずれもこの
発明の適正範囲を満足するロールを用いた場合、とりわ
け優れた円周方向の磁気特性が得られている。 As is clear from the table, particularly excellent magnetic properties in the circumferential direction are obtained when a roll having D, H and N satisfying the proper range of the present invention is used.
実施例2 C:0.0040%、Si:0.50%、Mn:1.25%、Al:0.20%、P:0.0
30%、S:0.0040%、Sb:0.05%、Cu:0.3%およびNi:0.4
%を含有し、残部は実質的にFeの組成になる2.3mm厚の
熱延板に、N2雰囲気中で850℃、5hの焼鈍を施し、以降
は実施例1と同様の処理を施して得たリング状試料の磁
気特性について調べた結果を表2に示す。Example 2 C: 0.0040%, Si: 0.50%, Mn: 1.25%, Al: 0.20%, P: 0.0
30%, S: 0.0040%, Sb: 0.05%, Cu: 0.3% and Ni: 0.4
%, With the balance being essentially Fe composition, a 2.3 mm thick hot-rolled sheet was annealed in an N 2 atmosphere at 850 ° C. for 5 h, and then the same treatment as in Example 1 was performed. Table 2 shows the results of examining the magnetic characteristics of the obtained ring-shaped sample.
(発明の効果) かくしてこの発明によれば、磁気特性とくに鋼板の円周
方向における磁気特性に優れたセミプロセス電磁鋼板を
得ることができ、小型モータなどの回転機器用鉄心材料
としての用途に用いて偉効を奏する。 (Effects of the Invention) Thus, according to the present invention, it is possible to obtain a semi-processed electromagnetic steel sheet having excellent magnetic characteristics, particularly in the circumferential direction of the steel sheet, and to be used as an iron core material for rotating equipment such as small motors. Play a great effect.
第1図は、スキンパスロール表面に形成したクレーター
の断面形状を示した図、 第2図は、クレーターの個数Nとリング状試料の透磁率
μ1.5との関係を示したグラフ、 第3図は、クレーターの円換算直径Dおよび最凸部と最
凹部との差Hが透磁率に及ぼす影響を示したグラフ、 第4図a〜iはそれぞれ、好適なクレーター配列を示し
た図である。FIG. 1 is a diagram showing the cross-sectional shape of the craters formed on the surface of the skin pass roll, FIG. 2 is a graph showing the relationship between the number N of craters and the magnetic permeability μ 1.5 of the ring-shaped sample, and FIG. 3 is , A graph showing the effect of the circle-converted diameter D of the crater and the difference H between the most convex portion and the most concave portion on the magnetic permeability, and FIGS. 4 a to i are diagrams showing a suitable crater arrangement.
Claims (1)
し、ついでスキンパス圧延を施す一連の工程によってセ
ミプロセス電磁鋼板を製造するに当り、 上記スキンパス圧延工程において、圧延ロールとして、
ロール表面に、円換算直径が200μm以下でかつ最凸部
と最凹部との差が5〜40μmの形状になるクレーター
を、単位面積1cm2当りの個数が1000個以上でしかもそ
れらが互いに重畳することなく配列させたロールを用い
ることを特徴とする、円周方向の磁気特性に優れたセミ
プロセス電磁鋼板の製造方法。1. A hot-rolled sheet having a composition containing C: 0.010 wt% or less, Si: 0.1 to 1.0 wt%, Mn: 0.5 to 1.5 wt% and Al: 0.1 to 0.6 wt% is cold-rolled. When manufacturing a semi-processed electromagnetic steel sheet by a series of steps of annealing, and then skin pass rolling, in the skin pass rolling step, as a rolling roll,
Craters with a circle equivalent diameter of 200 μm or less and a difference between the most convex part and the most concave part of 5 to 40 μm on the roll surface are 1000 or more per unit area 1 cm 2 and they overlap each other. A method for producing a semi-processed electrical steel sheet having excellent magnetic properties in the circumferential direction, characterized by using rolls arranged without any action.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62154289A JPH0680170B2 (en) | 1987-06-23 | 1987-06-23 | Method for manufacturing semi-processed electrical steel sheet with excellent circumferential magnetic properties |
US07/208,034 US4938806A (en) | 1987-06-23 | 1988-06-17 | Method for producing an electro-magnetic steel sheet |
KR1019880007683A KR910003536B1 (en) | 1987-06-23 | 1988-06-23 | Method for producing an electro-magnetic steel sheet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62154289A JPH0680170B2 (en) | 1987-06-23 | 1987-06-23 | Method for manufacturing semi-processed electrical steel sheet with excellent circumferential magnetic properties |
Publications (3)
Publication Number | Publication Date |
---|---|
JPS64223A JPS64223A (en) | 1989-01-05 |
JPH01223A JPH01223A (en) | 1989-01-05 |
JPH0680170B2 true JPH0680170B2 (en) | 1994-10-12 |
Family
ID=15580888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62154289A Expired - Lifetime JPH0680170B2 (en) | 1987-06-23 | 1987-06-23 | Method for manufacturing semi-processed electrical steel sheet with excellent circumferential magnetic properties |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0680170B2 (en) |
-
1987
- 1987-06-23 JP JP62154289A patent/JPH0680170B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS64223A (en) | 1989-01-05 |
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