JPH05195169A - Plural layer high silicon soft magnetic steel sheet having excellent cold-rollability and magnetic characteristic and its manufacture - Google Patents
Plural layer high silicon soft magnetic steel sheet having excellent cold-rollability and magnetic characteristic and its manufactureInfo
- Publication number
- JPH05195169A JPH05195169A JP524092A JP524092A JPH05195169A JP H05195169 A JPH05195169 A JP H05195169A JP 524092 A JP524092 A JP 524092A JP 524092 A JP524092 A JP 524092A JP H05195169 A JPH05195169 A JP H05195169A
- Authority
- JP
- Japan
- Prior art keywords
- high silicon
- steel sheet
- steel
- soft magnetic
- rolling
- 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.)
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- Heat Treatment Of Steel (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、軟磁性材料として電気
機器の鉄心などに用いられる磁気特性の優れた高硅素軟
磁性鋼板及びその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-silicon soft magnetic steel sheet having excellent magnetic properties, which is used as a soft magnetic material for iron cores of electric appliances and the like, and a method for producing the same.
【0002】[0002]
【従来の技術】Siの添加は鉄損特性を向上させ、6.
5%近傍で磁歪がゼロに近づくことから、透磁率も一段
と向上し、優れた磁気特性を示すことが知られている。
しかし、Siの添加量が4.5%以上になると冷間圧延
性が著しく劣化し、実用化されなかった。2. Description of the Related Art Addition of Si improves iron loss characteristics, and 6.
It is known that since the magnetostriction approaches zero near 5%, the magnetic permeability is further improved and excellent magnetic properties are exhibited.
However, when the amount of Si added was 4.5% or more, the cold rolling property was significantly deteriorated and it was not put into practical use.
【0003】冷間圧延性を向上させる手段として、熱延
板の組織を制御する方法が開示されている(特開昭61
−166923号、特開昭62−103321号公
報)。しかし、提示されている熱延条件の制約は生産性
の妨げになるだけでなく、製品板の集合組織の制御の点
では必ずしも良策とはいえない。As a means for improving the cold rolling property, a method of controlling the structure of a hot rolled sheet has been disclosed (Japanese Patent Laid-Open No. 61-61)
No. 166923, JP-A No. 62-103321). However, the restrictions on the hot rolling conditions presented not only hinder the productivity, but are not necessarily good measures in terms of controlling the texture of the product sheet.
【0004】また、他の方法として、冷延の圧延温度を
350℃〜450℃にすることにより冷延性を向上する
方法が開示されているが(特開平1−200702号公
報)、作業性、表面性状等の点で多くの問題を抱えてい
る。また、これらの対策を行なってもSiの添加量が
4.5%以上になると、変形抵抗の高く薄手材の圧延が
困難になる。As another method, a method of improving cold rolling property by setting the rolling temperature of cold rolling to 350 ° C. to 450 ° C. (Japanese Patent Laid-Open No. 1-200702), workability, There are many problems in terms of surface texture. Even if these measures are taken, if the amount of Si added is 4.5% or more, it is difficult to roll a thin material having high deformation resistance.
【0005】一方、磁気特性の面では、高Si材は高周
波域で特に優れた磁気特性を示すことが知られており、
この場合、板厚を薄くしないとその効果が十分現われな
い。また、高周波数域では磁束は表面近傍に集中的に走
ることが知られている。On the other hand, in terms of magnetic characteristics, it is known that the high Si material exhibits particularly excellent magnetic characteristics in a high frequency range.
In this case, the effect is not sufficiently exhibited unless the plate thickness is reduced. Further, it is known that in the high frequency range, the magnetic flux concentrates near the surface.
【0006】[0006]
【発明が解決しようとする課題】本発明は高硅素軟磁性
鋼板の難冷延の問題を回避し、高周波数領域で低鉄損特
性を示す鋼板及びその製造方法を提供するものである。SUMMARY OF THE INVENTION The present invention provides a steel sheet having a low iron loss characteristic in a high frequency region and a method for producing the same, while avoiding the problem of the cold rolling of the high silicon soft magnetic steel sheet.
【0007】[0007]
【課題を解決するための手段】本発明者らは冷間圧延性
の向上に関して研究を進め、難冷延材がサンドウィッチ
構造の複層鋼板にすることにより冷延性を著しく向上で
きることを確認した。この技術を高硅素軟磁性鋼板に利
用するに当たって検討した結果、冷間圧延性と磁気特性
の両面より優れた複層条件を見いだした。[Means for Solving the Problems] The inventors of the present invention have conducted research on improvement of cold rolling property, and have confirmed that cold rolling property can be remarkably improved by using a double-layer steel sheet having a sandwich structure as the refractory rolling material. As a result of studying the application of this technology to a high silicon soft magnetic steel sheet, a multi-layer condition excellent in both cold rollability and magnetic properties was found.
【0008】その要旨とするところは重量比で、C≦
0.006%、Si:4.0〜7.1%を含有し、残部
Fe及び不可避的不純物からなる材料を表層材とし、C
≦0.006%、Si:0.8〜3.5%を含有し、残
部Fe及び不可避的不純物からなる材料を内層材とする
サンドウィッチ構造の鋳込み複層鋼板で、表層材/内層
材の板厚比が0.1〜0.3である磁気特性の優れた複
層高硅素軟磁性鋼板である。The gist of the matter is the weight ratio, C ≦
A material containing 0.006%, Si: 4.0 to 7.1%, and a balance of Fe and unavoidable impurities as a surface layer material, and C
≤ 0.006%, Si: 0.8-3.5%, a sandwich structure cast multi-layer steel sheet having a material comprising the balance Fe and unavoidable impurities as an inner layer material, and a surface layer material / inner layer material plate. It is a multi-layered high silicon soft magnetic steel sheet having a thickness ratio of 0.1 to 0.3 and excellent magnetic properties.
【0009】更に本発明は鋳込みによって前記成分組成
の複層鋼片を製造し、熱延必要により、中間焼鈍し、冷
延及び最終焼鈍を行う冷延性、磁気特性に優れた複層高
硅素軟磁性鋼板の製造方法である。Further, the present invention produces a multi-layered steel slab having the above-mentioned composition by casting, performs intermediate annealing, cold rolling and final annealing, if necessary, for hot rolling. It is a manufacturing method of a magnetic steel sheet.
【0010】以下、本発明を詳細に説明する。まず、成
分の限定理由について述べる。表層及び内層材のC量を
0.006%以下と限定したのは、これ以上のCが添加
されると製品の磁気特性が大きく劣化するためである。The present invention will be described in detail below. First, the reasons for limiting the components will be described. The reason why the C content of the surface layer and the inner layer material is limited to 0.006% or less is that the magnetic properties of the product are significantly deteriorated when C content higher than this is added.
【0011】表層のSi量を4.0〜7.1%の範囲に
限定したのは、高周波数領域で低鉄損特性を得るのに必
要なSi量は少なくとも4.0%以上であり、また、過
剰なSiの添加は低鉄損特性の向上の効果が少なく、冷
延性が著しく劣化するので7.1%を上限とした。The amount of Si in the surface layer is limited to the range of 4.0 to 7.1% because the amount of Si required to obtain the low iron loss characteristics in the high frequency region is at least 4.0% or more. Further, addition of an excessive amount of Si has little effect of improving the low iron loss property and the cold rolling property is remarkably deteriorated, so 7.1% was made the upper limit.
【0012】一方、内層のSi量を0.8〜3.5%の
範囲に限定したのは、優れた磁気特性を得るのに必要な
Si量は少なくとも0.8%以上であり、冷延性の観点
では内層のSi量が3.5%超になると変形抵抗が高く
なり薄手圧延が困難になるためである。On the other hand, the reason for limiting the Si content of the inner layer to the range of 0.8 to 3.5% is that the Si content necessary for obtaining excellent magnetic properties is at least 0.8% or more, and the cold ductility From this point of view, if the amount of Si in the inner layer exceeds 3.5%, the deformation resistance becomes high and thin rolling becomes difficult.
【0013】上記以外の成分としてAl,Mnなどの電
気抵抗を高め、鉄損を低下させる元素の添加や固溶C,
Nを減じるためのTi,Nbなどの炭窒化物形成元素の
添加は本発明の趣旨を損ずるものではない。As components other than the above, the addition of elements such as Al and Mn which increase the electric resistance and lower the iron loss, and solid solution C,
The addition of carbonitride forming elements such as Ti and Nb for reducing N does not impair the gist of the present invention.
【0014】次に、複層構造の限定理由について述べ
る。表層材/内層材の板厚比を0.1〜0.3の範囲に
限定したのは、板厚比が0.1未満だと高周波数領域で
十分な低鉄損特性を得ることができないためであり、上
限を0.3としたのは、これ以上表層材の比率が大きく
なると冷延性が著しく劣化し、製品の薄手化が困難にな
るためである。ここでの板厚比は両面の表層材の板厚を
足した値を内層材の板厚で割った値である。Next, the reasons for limiting the multilayer structure will be described. The plate thickness ratio of the surface layer material / inner layer material is limited to the range of 0.1 to 0.3 because when the plate thickness ratio is less than 0.1, sufficient low iron loss characteristics cannot be obtained in the high frequency region. This is because the upper limit is set to 0.3 because if the ratio of the surface layer material is further increased, the cold rolling property is significantly deteriorated and it is difficult to make the product thinner. The plate thickness ratio here is a value obtained by adding the plate thicknesses of the surface layer materials on both sides and dividing the value by the plate thickness of the inner layer material.
【0015】また、複層構造の製造方法を鋳込み法に限
定したのは、他の製造方法である圧延圧着法や爆着法で
は冷延中に境界面で破壊が起こり、表層材の剥離などが
生じやすくなるためである。高周波数域では磁束が表面
近傍に集中するため、高Siは表層材だけでよいので、
本発明により合金コストの低減が達成できる。Further, the reason why the manufacturing method of the multi-layer structure is limited to the casting method is that in other manufacturing methods such as the rolling compression bonding method and the explosive bonding method, fracture occurs at the boundary surface during cold rolling, and the surface layer material is peeled off. Is likely to occur. In the high frequency range, magnetic flux concentrates near the surface, so high Si only needs to be the surface layer material.
A reduction in alloy cost can be achieved by the present invention.
【0016】[0016]
【実施例】表1に表層材と内層材に用いた材料の化学成
分を示す。供試材は鋳込みによって複層化され、凝固
後、直接熱延を行ない170mmの鋳片を約950℃で仕
上圧延を行ない、酸洗後、板厚0.23mmに冷延し、9
00℃で2分間の連続焼鈍あるいは800℃で3時間の
箱焼鈍を行なった。また、一部、900℃で2分間熱延
板焼鈍した材料も試験材に入れた。EXAMPLES Table 1 shows the chemical components of the materials used for the surface layer material and the inner layer material. The test material was made into multiple layers by casting, and after solidification, it was directly hot-rolled and 170 mm ingot was finish-rolled at about 950 ° C.
Continuous annealing at 00 ° C for 2 minutes or box annealing at 800 ° C for 3 hours was performed. Further, a part of the material which was annealed at 900 ° C. for 2 minutes was also put into the test material.
【0017】表2に材料の組み合わせ、板厚比、実験条
件、冷延性の良否、磁気特性などを示す。Table 2 shows material combinations, plate thickness ratios, experimental conditions, cold ductility, magnetic properties and the like.
【表1】 [Table 1]
【0018】[0018]
【表2】 [Table 2]
【0019】実験番号1,2,3,7,10,11,1
3,15,16,17は本発明鋼の範囲で、冷延性、磁
気特性ともに優れた特性を示す。実験番号4は内層のC
量が多いため磁性の劣化が見られる。実験番号5は内層
のSi量が0.5%と低いため鉄損が大きい。実験番号
6は内層のSi量が4.0%と高いため冷延時の変形抵
抗が高く、作業性が悪いだけでなく耳割れが発生した。Experiment numbers 1, 2, 3, 7, 10, 11, 1
Nos. 3, 15, 16 and 17 show excellent cold ductility and magnetic properties in the range of the steel of the present invention. Experiment number 4 is C in the inner layer
Since the amount is large, deterioration of magnetism is observed. Experiment number 5 has a large iron loss because the amount of Si in the inner layer is as low as 0.5%. In Experiment No. 6, since the amount of Si in the inner layer was as high as 4.0%, the deformation resistance during cold rolling was high, the workability was poor, and ear cracking occurred.
【0020】実験番号8は表層材のSi量が多く、冷延
時に割れが生じた。実験番号9は表層材のC量が高いた
め優れた磁気特性が得られなかった。実験番号12は表
層材の割合が低いために優れた磁気特性が得られなかっ
た。実験番号14は表層材の割合が高くなり過ぎ、冷延
時の変形抵抗が高くなり作業性が悪いだけでなく割れも
生じた。In Experiment No. 8, the surface layer material contained a large amount of Si and cracked during cold rolling. In Experiment No. 9, excellent magnetic properties could not be obtained because the C content of the surface layer material was high. In Experiment No. 12, excellent magnetic properties could not be obtained because the proportion of the surface layer material was low. In Experiment No. 14, the proportion of the surface layer material was too high, the deformation resistance during cold rolling was high, the workability was poor, and cracking occurred.
【0021】実験番号18は表層材と内層材を真空中で
電子ビーム溶接を行なった後、熱延で圧着して作った複
層鋼板の結果で、冷延時に割れを生じた。割れのない部
分の磁性を調べたところ、鋳込みで作った実験番号3の
複層材料より一様に鉄損が高いことが分かった。圧着材
に比べて鋳込み複層材の方が優れた冷延性及び磁気特性
を示す理由は十分解明されていないが境界層近傍の拡散
現象が影響していることが推測される。Experiment No. 18 is a result of a multi-layer steel sheet produced by electron beam welding of the surface layer material and the inner layer material in a vacuum and then pressure bonding by hot rolling, which caused cracks during cold rolling. When the magnetism of the portion without cracks was examined, it was found that the iron loss was uniformly higher than that of the multilayer material of Experiment No. 3 made by casting. The reason why the cast multi-layer material exhibits superior cold ductility and magnetic properties compared to the pressure-bonded material has not been fully clarified, but it is presumed that the diffusion phenomenon near the boundary layer has an effect.
【0022】また、本発明鋼は高Si鋼の単層材に比べ
ると磁束密度が高い特徴がある。例えば、実験番号3の
材料のB50は1.61、実験番号1のB50は1.60と
6.5%Siの単層材の比較材の1.50に比べると著
しく高い値である。Further, the steel of the present invention is characterized in that it has a higher magnetic flux density than the single layer material of high Si steel. For example, the material of the B 50 in Experiment No. 3 is 1.61, B 50 of Experiment No. 1 is a value significantly higher than the 1.50 of comparative material of a single layer material of 1.60 and 6.5% Si ..
【0023】[0023]
【発明の効果】本発明によれば、通常の冷間圧延で極め
て薄い板厚まで損傷なく圧延でき、高周波数域で優れた
鉄損値を示し、磁束密度も高い薄板を低コストで供給で
きる。EFFECTS OF THE INVENTION According to the present invention, it is possible to supply a thin plate having an excellent iron loss value in a high frequency range and a high magnetic flux density at a low cost, which can be rolled by an ordinary cold rolling to a very thin plate thickness without damage. ..
Claims (2)
し、 C≦0.006%、 Si:0.8〜3.5%、 残部Fe及び不可避的不純物からなる材料を内層材とす
るサンドウィッチ構造の鋳込み複層鋼板で表層材/内層
材の板厚比が0.1〜0.3である冷延性、磁気特性の
優れた複層高硅素軟磁性鋼板。1. By weight%, C ≦ 0.006%, Si: 4.0-7.1%, a material consisting of balance Fe and unavoidable impurities as a surface layer material, C ≦ 0.006%, Si: 0.8-3.5%, a sandwich-type cast multi-layer steel sheet having a material of the balance Fe and unavoidable impurities as an inner layer material, and a plate thickness ratio of surface layer material / inner layer material of 0.1 to 0.3. Multi-layer high-silicon soft magnetic steel sheet with excellent cold ductility and magnetic properties.
延、必要により中間焼鈍し、冷延及び最終焼鈍を行うこ
とを特徴とする請求項1記載の冷延性、磁気特性に優れ
た複層高硅素軟磁性鋼板の製造方法。2. A compound steel sheet having excellent cold ductility and magnetic properties according to claim 1, wherein a multi-layer steel slab is produced by casting, hot rolling, intermediate annealing if necessary, cold rolling and final annealing are performed. Method of producing high-layer soft silicon soft magnetic steel sheet.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP524092A JP2706016B2 (en) | 1992-01-14 | 1992-01-14 | Multi-layer high silicon soft magnetic steel sheet excellent in cold rollability and magnetic properties and method for producing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP524092A JP2706016B2 (en) | 1992-01-14 | 1992-01-14 | Multi-layer high silicon soft magnetic steel sheet excellent in cold rollability and magnetic properties and method for producing the same |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05195169A true JPH05195169A (en) | 1993-08-03 |
JP2706016B2 JP2706016B2 (en) | 1998-01-28 |
Family
ID=11605678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP524092A Expired - Lifetime JP2706016B2 (en) | 1992-01-14 | 1992-01-14 | Multi-layer high silicon soft magnetic steel sheet excellent in cold rollability and magnetic properties and method for producing the same |
Country Status (1)
Country | Link |
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JP (1) | JP2706016B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6519725B1 (en) * | 2017-12-12 | 2019-05-29 | Jfeスチール株式会社 | Multi-layered electromagnetic steel sheet |
WO2019117089A1 (en) * | 2017-12-12 | 2019-06-20 | Jfeスチール株式会社 | Multilayer electromagnetic steel sheet |
WO2019117096A1 (en) * | 2017-12-12 | 2019-06-20 | Jfeスチール株式会社 | Multilayer electromagnetic steel sheet |
-
1992
- 1992-01-14 JP JP524092A patent/JP2706016B2/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6519725B1 (en) * | 2017-12-12 | 2019-05-29 | Jfeスチール株式会社 | Multi-layered electromagnetic steel sheet |
WO2019117089A1 (en) * | 2017-12-12 | 2019-06-20 | Jfeスチール株式会社 | Multilayer electromagnetic steel sheet |
WO2019117096A1 (en) * | 2017-12-12 | 2019-06-20 | Jfeスチール株式会社 | Multilayer electromagnetic steel sheet |
JP6555449B1 (en) * | 2017-12-12 | 2019-08-07 | Jfeスチール株式会社 | Multi-layer electrical steel sheet |
RU2742291C1 (en) * | 2017-12-12 | 2021-02-04 | ДжФЕ СТИЛ КОРПОРЕЙШН | Multilayered sheet of electrical steel |
RU2742292C1 (en) * | 2017-12-12 | 2021-02-04 | ДжФЕ СТИЛ КОРПОРЕЙШН | Multilayered sheet of electrical steel |
US11355271B2 (en) | 2017-12-12 | 2022-06-07 | Jfe Steel Corporation | Multilayer electrical steel sheet |
US11401589B2 (en) | 2017-12-12 | 2022-08-02 | Jfe Steel Corporation | Multilayer electrical steel sheet |
Also Published As
Publication number | Publication date |
---|---|
JP2706016B2 (en) | 1998-01-28 |
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