JPH0689805A - Very high magnetic flux density oriented electromagnetic steel plate - Google Patents
Very high magnetic flux density oriented electromagnetic steel plateInfo
- Publication number
- JPH0689805A JPH0689805A JP4240698A JP24069892A JPH0689805A JP H0689805 A JPH0689805 A JP H0689805A JP 4240698 A JP4240698 A JP 4240698A JP 24069892 A JP24069892 A JP 24069892A JP H0689805 A JPH0689805 A JP H0689805A
- Authority
- JP
- Japan
- Prior art keywords
- flux density
- magnetic flux
- cold rolling
- iron loss
- matrix
- 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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- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はトランス等の鉄心に用い
られる、鋼板面に｛１１０｝〈００１〉方位のいわゆる
ゴス方位を高度に発達させた高磁束密度一方向性電磁鋼
板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 magnetic flux density unidirectional electrical steel sheet used for an iron core of a transformer or the like, in which a so-called Goss orientation of {110} <001> orientation is highly developed on the steel sheet surface. .
【０００２】[0002]
【従来の技術】一方向性電磁鋼板は、軟質磁性材料とし
て主にトランスその他の電気機器の鉄心材料に使用され
ているもので、特性としては磁気特性、特に励磁特性と
鉄損特性が良好でなくてはならない。2. Description of the Related Art Unidirectional electrical steel sheets are mainly used as a soft magnetic material for iron core materials of transformers and other electric equipment. They have good magnetic characteristics, especially excitation characteristics and iron loss characteristics. Must-have.
【０００３】この励磁特性を表す指標としては、通常磁
束密度Ｂ8 （磁場の強さ８００A/mにおける磁束密度）
が用いられている。また鉄損特性を表す指標としてはＷ
17/5 0 （５０Hzで１．７Ｔまで磁化させたときの単位重
量あたりの鉄損）等が用いられている。As an index showing this excitation characteristic, a normal magnetic flux density B 8 (magnetic flux density at a magnetic field strength of 800 A / m)
Is used. In addition, as an index showing the iron loss characteristic, W
17/5 0 (iron loss per unit weight when magnetized to 1.7 T at 50 Hz) and the like are used.
【０００４】近年省エネルギー、省資源への社会的要求
は益々厳しくなり、一方向性電磁鋼板の鉄損低減、磁化
特性改善への要求も熾烈になってきている。特に鉄損低
減が強く望まれている。In recent years, social demands for energy saving and resource saving have become more and more strict, and demands for reducing iron loss and improving magnetization characteristics of unidirectional electrical steel sheets have also become strict. In particular, iron loss reduction is strongly desired.
【０００５】鉄損は良く知られているように履歴損と渦
電流損からなり、履歴損は鋼板の結晶方位、純度、内部
歪等により左右され、渦電流損には鋼板の電気抵抗、板
厚、結晶粒度、磁区の大きさ、鋼板被膜張力等が大きく
寄与する。As is well known, iron loss consists of hysteresis loss and eddy current loss. Hysteresis loss depends on the crystal orientation, purity, internal strain, etc. of the steel sheet. The thickness, grain size, magnetic domain size, steel sheet coating tension, etc. make a large contribution.
【０００６】それらの中で純度、内部歪の点では古くか
ら製造技術的に考慮されほぼ限界に達している。電気抵
抗を大きくするためにＳｉ含有量を高めて渦電流損を低
減する試みもなされてはいるが、Ｓｉ含有量を高めると
製造中および製品での加工性が劣化するため限界があ
る。Among them, the purity and the internal strain have been considered from the viewpoint of manufacturing technology for a long time and have reached the limit. Although attempts have been made to increase the Si content to reduce the eddy current loss in order to increase the electric resistance, increasing the Si content has a limit because workability during manufacturing and products deteriorates.
【０００７】板厚を薄くして渦電流損を低減させる試み
も種々なされているが、２次再結晶が基本的に困難にな
る他に変圧器等を加工するに当たり加工手間がかかるの
で同じ鉄損値ならば板厚が厚い方が工業的には優れてい
ると云える。従って板厚の薄手化にも限界がある。Various attempts have been made to reduce the eddy current loss by reducing the plate thickness, but secondary recrystallization is basically difficult, and it takes time and labor to process a transformer or the like. If the loss value is large, it can be said that a thick plate is industrially superior. Therefore, there is a limit in thinning the plate thickness.
【０００８】鋼板に被膜張力を付与して鉄損特性を改善
する方法が特公昭５１−１２４５１号公報、特公昭５３
−２８３７５号公報に記載されているが、これらの張力
効果は方向性に依存し、磁束密度Ｂ8 が高いほど大きい
ことがＪ．Ａｐｐｌ．Ｐｈｙｓ., Vol．４１，No．７，
２９８１−２９８４，Ｊｕｎｅ １９７０に記載されて
いる。従ってＢ8 がいわゆる高磁束密度一方向性電磁鋼
板として市販されている１．９３Ｔ程度では鉄損の向上
にも限界がある。A method for imparting film tension to a steel sheet to improve iron loss characteristics is disclosed in Japanese Examined Patent Publication Nos. 51-12451 and 53.
No. 28375, the tension effect depends on the directionality, and the higher the magnetic flux density B 8 is, the larger the effect is. Appl. Phys., Vol. 41, No. 7,
2981-2984, June 1970. Therefore, if B 8 is about 1.93T, which is commercially available as a so-called high magnetic flux density grain-oriented electrical steel sheet, improvement in iron loss is limited.
【０００９】また磁区の大きさは結晶粒の大きさとも関
係するが最近人工的に磁区を細分化して鉄損を下げる技
術が特公昭５８−５９６８号公報、特公昭５８−２６４
０５号公報等により報告されているが、これらの方法も
鉄損低減効果は磁束密度Ｂ8に依存し、市販品の１．９
３Ｔ程度では鉄損低減も限界がある。The size of the magnetic domain is also related to the size of the crystal grain, but recently, a technique for artificially subdividing the magnetic domain to reduce iron loss is disclosed in Japanese Patent Publication Nos. 58-5968 and 58-264.
As reported in Japanese Patent Publication No. 05, etc., the iron loss reduction effect of these methods also depends on the magnetic flux density B 8 and is 1.9 of the commercially available product.
At about 3T, there is a limit to iron loss reduction.
【００１０】鉄損低減の最も近道の方法に２次再結晶粒
の微細化を図る方法があり、特公昭５７−９４１９号公
報等について報告されているが、一般に２次再結晶粒を
小さくする手段をとると高い磁束密度が得難いと云う現
象があるため結晶粒の微細化も鉄損低減の手段として限
界がある。[0010] The most shortcut method for reducing iron loss is to reduce the size of secondary recrystallized grains, which has been reported in Japanese Patent Publication No. 57-9419, but generally the secondary recrystallized grains are made smaller. Since there is a phenomenon that it is difficult to obtain a high magnetic flux density if a measure is taken, there is a limit to reducing the iron loss by making the crystal grains fine.
【００１１】[0011]
【発明が解決しようとする課題】本発明は上記鉄損低減
の種々の手段に替わる新しい、すなわち残された結晶方
位の改善された超高磁束密度一方向性電磁鋼板を提供す
るものである。DISCLOSURE OF THE INVENTION The present invention provides a new, that is, an ultrahigh magnetic flux density unidirectional electrical steel sheet having an improved residual crystal orientation, which is an alternative to various means for reducing iron loss.
【００１２】[0012]
【課題を解決するための手段】本発明の特徴とするとこ
ろは、次の通りである。 １）重量で、Ｓｉ：２．５〜４．０％、Ｂｉ：０．００
０５〜０．０５％を必須成分として含有し、且つ磁束密
度Ｂ8 が１．９５Ｔ以上の極めて高い値を有する一方向
性電磁鋼板であって、マトリックスの結晶粒径が冷延直
角方向５０mm以下５mm以上、冷延方向３００mm以下１０
mm以上のものが面積率で８０％以上を占めることを特徴
とする超高磁束密度一方向性電磁鋼板。The features of the present invention are as follows. 1) By weight, Si: 2.5 to 4.0%, Bi: 0.00
A grain-oriented electrical steel sheet containing 05 to 0.05% as an essential component and having a very high magnetic flux density B 8 of 1.95 T or more, wherein the matrix grain size is 50 mm or less in the direction perpendicular to cold rolling. 5 mm or more, cold rolling direction 300 mm or less 10
An ultra-high magnetic flux density unidirectional electrical steel sheet characterized by having an area ratio of 80 mm or more in mm or more.
【００１３】２）マトリックス粒内に平均粒径５mm以下
の微細結晶を含むものが５０％以上を占めることを特徴
とする１）記載の超高磁束密度一方向性電磁鋼板。2) The ultrahigh magnetic flux density unidirectional electrical steel sheet according to 1), wherein 50% or more of the matrix grains contain fine crystals having an average grain size of 5 mm or less.
【００１４】３）マトリックス粒の（１１０）〔００
１〕方位の圧延面からの傾き角がＴＤ軸回りおよびＮＤ
軸回りで５°以内の結晶が面積率で９０％以上を占め、
且つマトリックス粒内の微細結晶の（１１０）〔００
１〕方位の圧延面からの傾き角がＴＤ軸回りおよびＮＤ
軸回りで１０°以内の結晶が微細粒の９０％以上を占め
ることを特徴とする２）記載の超高磁束密度一方向性電
磁鋼板。3) Matrix grain of (110) [00
1] The tilt angle of the orientation from the rolling surface is around the TD axis and ND
Crystals within 5 ° around the axis occupy 90% or more in area ratio,
In addition, (110) [00 of fine crystals in matrix grains
1] The tilt angle of the orientation from the rolling surface is around the TD axis and ND
The ultrahigh magnetic flux density unidirectional electrical steel sheet according to 2), characterized in that crystals within 10 ° around the axis occupy 90% or more of the fine grains.
【００１５】以下本発明の詳細について説明する。本発
明者は鉄損低減のための製品の具備すべき条件について
種々の検討を加え、２．５〜４．０％のＳｉを含有する
一方向性電磁鋼板に０．０００５〜０．０５％のＢｉを
含有させ、且つ２次再結晶粒のマトリックスならびにマ
トリックス粒内に存在する微細粒を規制することにより
極めて磁束密度の高く、鉄損低減効果の著しい超高磁束
密度一方向性電磁鋼板の開発に成功した。The details of the present invention will be described below. The present inventor has conducted various studies on the conditions that the product should have for reducing iron loss, and has added 0.0005-0.05% to the grain-oriented electrical steel sheet containing 2.5-4.0% Si. Of Bi, and by controlling the matrix of the secondary recrystallized grains and the fine grains existing in the matrix grains, the magnetic flux density is extremely high, and the iron loss reducing effect is extremely high. Successful development.
【００１６】先ず成分条件について限定理由を説明す
る。Ｓｉ含有量は製品の電気抵抗を通して鉄損特性を大
きく左右するが、２．５％未満では電気抵抗が小さく渦
電流損が増大するので好ましくない。一方４．０％超で
は加工性が劣化するので製造、製品加工が困難になり好
ましくない。First, the reasons for limiting the component conditions will be described. The Si content largely affects the iron loss characteristics through the electrical resistance of the product, but if it is less than 2.5%, the electrical resistance is small and the eddy current loss increases, which is not preferable. On the other hand, if it exceeds 4.0%, the workability is deteriorated, which makes manufacturing and product processing difficult, which is not preferable.
【００１７】次にＢｉであるがこれは２次再結晶粒の形
状を左右するのみならず製品の磁束密度を１．９５Ｔ以
上にするための必須元素であり、０．０００５％未満で
は２次再結晶粒が冷延直角方向５mm以下、冷延方向１０
mm以下のものを２０％超含むようになり、磁束密度が
１．９５Ｔ未満になる。０．０５％超ではその効果が飽
和するのでコスト上好ましくない。Next, Bi is an essential element that not only influences the shape of the secondary recrystallized grains but also makes the magnetic flux density of the product 1.95 T or more. If it is less than 0.0005%, it is secondary. Recrystallized grains are 5 mm or less in the direction perpendicular to cold rolling, and 10 in cold rolling.
The content of less than mm exceeds 20%, and the magnetic flux density becomes less than 1.95T. If it exceeds 0.05%, the effect is saturated, which is not preferable in terms of cost.
【００１８】Ｂｉが２次再結晶に何故影響をおよぼし磁
束密度を極めて高くするかは良く判らないが、本発明者
はＢｉの粒界偏析によるインヒビター作用かあるいは主
インヒビターである窒化物、硫化物を変化させているも
のと推定している。Although it is not clear why Bi affects secondary recrystallization and makes the magnetic flux density extremely high, the present inventors have found that Bi has an inhibitory action due to grain boundary segregation or a main inhibitor such as nitride or sulfide. Is estimated to be changing.
【００１９】次に磁束密度の限定理由について説明す
る。図１に３％Ｓｉ含有鋼板の板厚０．３０mmの製品を
マクロ後レーザー照射を行い、張力１．５kg／mm2 で磁
気測定したものの磁束密度と鉄損の関係を示す。鉄損Ｗ
17/50 が０．３０mm製品でも特に優れたと云える０．９
０W/kgを切るようになるのは１．９５Ｔ以上の場合に限
られるので本発明では磁束密度を１．９５Ｔ以上に限定
した。Next, the reason for limiting the magnetic flux density will be described. FIG. 1 shows the relationship between the magnetic flux density and the iron loss of a product of a steel plate containing 3% Si having a plate thickness of 0.30 mm, which was subjected to laser irradiation after macro irradiation and magnetically measured at a tension of 1.5 kg / mm 2 . Iron loss W
17/50 is said to be particularly excellent even for 0.30 mm products 0.9
The magnetic flux density is limited to 1.95 T or more in the present invention, so the magnetic flux density is limited to 1.95 T or more in the present invention.
【００２０】次に２次再結晶粒の粒径の限定理由につい
て説明する。先述したように一般に２次再結晶粒径が減
少すると磁束密度が低下するが、本発明者は種々の製造
法で製造した製品の結晶粒径と磁束密度の関係を詳細に
検討し、図２，３に示すような結果を得た。Next, the reason for limiting the grain size of the secondary recrystallized grains will be described. As described above, the magnetic flux density generally decreases as the secondary recrystallized grain size decreases. However, the present inventor has studied in detail the relationship between the crystal grain size and the magnetic flux density of products manufactured by various manufacturing methods, and FIG. , 3 were obtained.
【００２１】結晶粒径は２次再結晶粒のうち冷延方向５
mm以上のマトリックスについて平均した。図２は冷延方
向の結晶粒径と磁束密度の関係で、磁束密度のバラツキ
は大きいが磁束密度が１．９５Ｔ以上になるのは１０mm
以上の場合で１０mm未満では１．９５Ｔを超える製品は
得られなかった。The crystal grain size is 5 in the cold rolling direction among the secondary recrystallized grains.
Averaged for matrices above mm. Fig. 2 shows the relationship between the crystal grain size in the cold rolling direction and the magnetic flux density. The variation in the magnetic flux density is large, but the magnetic flux density above 1.95T is 10 mm.
In the above cases, when the length was less than 10 mm, a product exceeding 1.95T could not be obtained.
【００２２】１０mm以上の粒径のものでは１．９５Ｔ未
満のものもあるが１．９５Ｔ以上の極めて磁束密度の高
い製品が得られることが判る。同様に図３より冷延直角
方向の結晶粒径が５mm以上の粒径の場合に初めて１．９
５Ｔ以上の製品になることが判る。It can be seen that a product having an extremely high magnetic flux density of 1.95 T or more can be obtained although some particles having a particle size of 10 mm or more are less than 1.95 T. Similarly, as shown in FIG. 3, when the grain size in the direction perpendicular to the cold rolling is 5 mm or more, it is 1.9 for the first time.
It turns out that it will be a product of 5T or more.
【００２３】次にマトリックス粒中の限定サイズ以上の
大きな結晶粒の存在比率であるが、上記のように１０mm
（冷延直角方向では５mm）未満の結晶粒は磁束密度が低
いので、その存在比率が２０％を超えると製品全体の磁
束密度にも影響し、１．９５Ｔを超えることが困難にな
るので８０％以上に限定した。Next, regarding the abundance ratio of large crystal grains having a size larger than the limited size in the matrix grains, it is 10 mm as described above.
Since the crystal grains of less than (5 mm in the direction perpendicular to cold rolling) have a low magnetic flux density, if the abundance ratio exceeds 20%, the magnetic flux density of the entire product will be affected and it will be difficult to exceed 1.95T. Limited to at least%.
【００２４】マトリックス粒内の微細結晶の限定理由に
ついて説明する。図４に３％Ｓｉ含有鋼板の板厚０．３
０mmの製品（張力コーティングつき）の磁束密度と鉄損
の関係を示す。黒丸は粗大２次再結晶粒マトリックス中
に５mm以下の粒径の微細２次再結晶粒を含む率が５０％
以上の場合で、白丸はそれが５０％未満の場合である。The reason for limiting the fine crystals in the matrix grains will be described. Fig. 4 shows the steel plate thickness of 0.3% containing 3% Si.
The relationship between the magnetic flux density and the iron loss of a 0 mm product (with a tension coating) is shown. Black circles contain 50% of fine secondary recrystallized grains with a grain size of 5 mm or less in the coarse secondary recrystallized grain matrix.
In the above cases, white circles are cases where it is less than 50%.
【００２５】図１のレーザー照射材とは異なり磁束密度
と鉄損の間に明瞭な相関はないように見えるが、一部に
はレーザー照射材の鉄損にも匹敵するような優れた製品
が見受けられる。これらの鉄損の優れた製品について本
発明者らが詳細に調査した結果、図中に区別したように
粗大２次再結晶粒マトリックス中に５mm以下の微細２次
再結晶粒を含むものが５０％以上の場合にのみ鉄損が
０．９５W/kg以下の優れた製品が得られていることが判
明した。従って本発明では微細２次再結晶を含む確率を
５０％以上に限定する。Unlike the laser-irradiated material shown in FIG. 1, there seems to be no clear correlation between the magnetic flux density and the iron loss, but there are some excellent products which are comparable to the iron-irradiated material of the laser-irradiated material. Can be seen. As a result of detailed investigations by the present inventors on these products having excellent iron loss, as shown in the figure, 50 coarse fine recrystallized grains contained fine secondary recrystallized grains of 5 mm or less. It was found that an excellent product having an iron loss of 0.95 W / kg or less was obtained only when the content was at least%. Therefore, in the present invention, the probability of including fine secondary recrystallization is limited to 50% or more.
【００２６】この鉄損低減のメカニズムについては必ず
しも明確ではないが、本発明者は磁束密度が極めて高い
本発明対象の超高磁束密度一方向性電磁鋼板において
は、微細２次再結晶粒を含まない場合は磁壁が結晶粒を
突き抜けて連続し、磁区が粗大化するのに対し、微細結
晶粒を含む場合にはその微細結晶から新たな磁区が発生
し、磁区細分化効果を生んでいるものと推定している。Although the mechanism for reducing the iron loss is not always clear, the present inventor has found that the super high magnetic flux density unidirectional electrical steel sheet of the present invention, which has an extremely high magnetic flux density, contains fine secondary recrystallized grains. If there is no magnetic domain, the domain wall penetrates through the crystal grains and continues, and the magnetic domain becomes coarse.On the other hand, if it contains fine crystal grains, a new magnetic domain is generated from the fine crystal, which produces the domain refinement effect. Is estimated.
【００２７】製品の磁束密度と２次再結晶粒の方位に関
係のあることは周知のことであるが、本発明のようにマ
トリックス粗大２次再結晶粒と結晶内に更に微細２次再
結晶粒を含むような場合についての方位分布について明
確にされたものはなかった。特に本発明のように１．９
５Ｔ以上の超高磁束密度一方向性電磁鋼板についての方
位分布の公知例は全くなかった。そこで本発明者は本発
明材について詳細な方位測定を行って以下のような新規
知見を得ることに成功した。It is well known that there is a relation between the magnetic flux density of the product and the orientation of the secondary recrystallized grains, but as in the present invention, the matrix coarse secondary recrystallized grains and finer secondary recrystallized grains within the crystals are used. There was no clarification of the orientation distribution in the case of containing grains. Especially as in the present invention, 1.9
There was no known example of orientation distribution for an ultra-high magnetic flux density grain-oriented electrical steel sheet of 5T or more. Therefore, the present inventor succeeded in obtaining the following new findings by performing detailed azimuth measurement on the present invention material.
【００２８】即ち、マトリックス粒の（１１０）〔００
１〕方位の圧延面からの傾き角がＴＤ軸回りおよびＮＤ
軸回りで５°以内の結晶が面積率で９０％以上を占め、
且つマトリックス粒内の微細結晶の（１１０）〔００
１〕方位の圧延面からの傾き角が、ＴＤ軸回りおよびＮ
Ｄ軸回りで１０°以内の結晶が微細粒の９０％以上を占
めることが必要であることを知見した。That is, (110) [00 of matrix grains
1] The tilt angle of the orientation from the rolling surface is around the TD axis and ND
Crystals within 5 ° around the axis occupy 90% or more in area ratio,
In addition, (110) [00 of fine crystals in matrix grains
1] The tilt angle of the azimuth from the rolling surface is around the TD axis and N
It was found that crystals within 10 ° around the D axis should occupy 90% or more of the fine grains.
【００２９】マトリックス粒の方位分散が理想ゴス方位
から５°を超える結晶が１０％超存在すると、得られた
製品の磁束密度は１．９５Ｔ未満となり、また同じよう
に微細２次再結晶粒の方位分散が理想ゴス方位から１０
°を超えると同様に磁束密度が１．９５Ｔ未満となる。
以上の点から本発明の範囲に限定する。If more than 10% of the crystals in which the orientation dispersion of the matrix grains exceeds 5 ° from the ideal Goth orientation are present, the magnetic flux density of the obtained product will be less than 1.95 T, and similarly, fine secondary recrystallized grains will be produced. Azimuth dispersion is 10 from the ideal Goth azimuth
If it exceeds °, the magnetic flux density becomes less than 1.95T.
From the above points, the scope of the present invention is limited.
【００３０】次に本発明の超高磁束密度一方向性電磁鋼
板の製造方法について述べる。先ず第１の条件は素材成
分であるがＣ：０．０３〜０．１５％、Ｓｉ：２．５〜
４．０％、Ｍｎ：０．０２〜０．８０％、Ｓ：０．０４
０％以下、酸可溶性Ａｌ：０．０１０〜０．０６５％、
Ｎ：０．００３０〜０．０１５０％を基本成分として含
有し、更にＢｉを０．０００５〜０．０５％を含有する
ことを必須要件とする。Next, a method of manufacturing the super high magnetic flux density grain-oriented electrical steel sheet of the present invention will be described. First, the first condition is the material composition, but C: 0.03 to 0.15%, Si: 2.5 to
4.0%, Mn: 0.02-0.80%, S: 0.04
0% or less, acid-soluble Al: 0.010 to 0.065%,
It is essential to contain N: 0.0030 to 0.0150% as a basic component and further contain Bi in an amount of 0.0005 to 0.05%.
【００３１】その他必要に応じてＳｎ：０．０５〜０．
５０％、Ｃｕ：０．０１〜０．１０％含有することは許
される。その他通常の一方向性電磁鋼板製造に用いられ
るインヒビター元素を補助的に用いることも妨げるもの
ではない。In addition, Sn: 0.05 to 0.
50%, Cu: 0.01 to 0.10% is allowed to be contained. It does not hinder the supplementary use of other inhibitor elements that are usually used in the production of grain-oriented electrical steel sheets.
【００３２】本製造法の特徴はＢｉ添加にある。Ｂｉは
０．０００５％未満では製品の磁束密度向上の効果が小
さく、且つ２次再結晶粒径が小さく方向性がよくない。
一方０．０５％超では磁束密度向上の効果が飽和すると
ともに熱延時に端部割れを生ずるので好ましくない。The feature of this manufacturing method lies in the addition of Bi. When Bi is less than 0.0005%, the effect of improving the magnetic flux density of the product is small, the secondary recrystallized grain size is small, and the directionality is not good.
On the other hand, if it exceeds 0.05%, the effect of improving the magnetic flux density is saturated, and end cracking occurs during hot rolling, which is not preferable.
【００３３】溶解、鋳造、熱延は一方向性電磁鋼板製造
に用いられている通常の方法でよい。熱延板は必要に応
じ熱延板焼鈍を施す。この焼鈍は１段冷延法の場合は熱
延板で施し、２段以上の冷延法の場合は最終冷延前の焼
鈍を指す。The melting, casting, and hot rolling may be the usual methods used for producing unidirectional electrical steel sheets. The hot rolled sheet is annealed as necessary. This annealing is performed with a hot-rolled sheet in the case of the one-stage cold rolling method, and refers to annealing before the final cold rolling in the case of the two-stage or more cold rolling method.
【００３４】焼鈍は９５０〜１２００℃で３０秒〜３０
分間の焼鈍を行い、必要に応じ急冷処理を施してもよ
い。冷延は１段もしくは２段以上のステージで行うが、
高磁束密度一方向性電磁鋼板であることから最終冷延の
圧延率は６５〜９５％の強圧下冷延が好ましい。Annealing is performed at 950 to 1200 ° C. for 30 seconds to 30 seconds.
It may be annealed for a minute, and may be rapidly cooled if necessary. Cold rolling is performed in one or more stages,
Since it is a high magnetic flux density grain-oriented electrical steel sheet, it is preferable that the cold rolling of the final cold rolling is 65 to 95%.
【００３５】最終冷延以外のステージの圧延率は特に規
定しなくてもよい。この冷延法であるが必要に応じて特
公昭５４−１３８４６号公報記載の時効冷延を施すこと
は有益である。The rolling ratio of the stages other than the final cold rolling may not be specified. Although it is this cold rolling method, it is useful to perform the aging cold rolling described in Japanese Patent Publication No. 54-13846 as necessary.
【００３６】最終製品板厚に圧延した冷延板を続いて通
常の方法で脱炭焼鈍を行う。脱炭焼鈍の条件は特に規定
しないが、好ましくは７００〜９００℃の温度範囲で３
０秒〜３０分間の湿潤な水素または水素と窒素の混合雰
囲気で行うのがよい。The cold rolled sheet rolled to the final product sheet thickness is subsequently decarburized and annealed by a usual method. The conditions of decarburization annealing are not particularly specified, but preferably 3 in the temperature range of 700 to 900 ° C.
It is preferable to perform the treatment in wet hydrogen or a mixed atmosphere of hydrogen and nitrogen for 0 seconds to 30 minutes.
【００３７】脱炭焼鈍後の鋼板表面には２次再結晶焼鈍
における焼き付き防止およびグラス被膜生成のため、通
常の方法で通常のＭｇＯを主成分とする焼鈍分離剤を塗
布する。引き続く２次再結晶焼鈍は１０００℃以上の温
度で５時間以上、水素または窒素またはそれらの混合雰
囲気で行えばよい。On the surface of the steel sheet after decarburization annealing, an ordinary annealing separating agent containing MgO as a main component is applied by a usual method in order to prevent seizure in secondary recrystallization annealing and to form a glass film. The subsequent secondary recrystallization annealing may be performed at a temperature of 1000 ° C. or higher for 5 hours or more in an atmosphere of hydrogen or nitrogen or a mixed atmosphere thereof.
【００３８】２次再結晶焼鈍後の鋼板は引き続き余分の
焼鈍分離剤を除去後、コイル巻ぐせを矯正するための連
続焼鈍を行い、同時に絶縁被膜（張力付与被膜を兼ね
る）を塗布、焼き付ける。更に必要に応じてレーザー照
射等の磁区細分化処理を施す。磁区細分化の方法は特に
限定する必要はない。After the secondary recrystallization annealing, the excess annealing separator is removed from the steel sheet, followed by continuous annealing for straightening the coil winding. At the same time, an insulating coating (also serving as a tension-imparting coating) is applied and baked. Further, magnetic domain subdivision processing such as laser irradiation is performed if necessary. The method of subdividing the magnetic domains is not particularly limited.
【００３９】以上本発明の超高磁束密度一方向性電磁鋼
板の製造法について述べたが、製造法はこの方法に限ら
れるわけではなく、Ｓｉ，Ｂｉの含有の規制を除けば如
何なるインヒビター元素を用いる方法でも、またプロセ
ス条件も上記方法にこだわるものではない。The manufacturing method of the ultra-high magnetic flux density grain-oriented electrical steel sheet of the present invention has been described above. However, the manufacturing method is not limited to this method, and any inhibitor element other than the regulation of Si and Bi content can be used. The method used and the process conditions are not limited to the above method.
【００４０】[0040]
【実施例】（実施例１）Ｃ：０．０６〜０．０９％、Ｓ
ｉ：３．０〜３．３５％、Ｍｎ：０．０８％、Ｓ：０．
０２５％、酸可溶性Ａｌ：０．０２０〜０．０３５％、
Ｎ：０．００８％、Ｓｎ：０〜０．１５％、Ｃｕ：０．
０５％およびＢｉ：０．０００５〜０．０５％を含有し
その他不可避不純物からなる電磁鋼板用スラブを１３２
０℃に加熱後直ちに熱延し２．３mmの熱延板とした。(Example) C: 0.06 to 0.09%, S
i: 3.0-3.35%, Mn: 0.08%, S: 0.
025%, acid-soluble Al: 0.020 to 0.035%,
N: 0.008%, Sn: 0 to 0.15%, Cu: 0.
A slab for electrical steel sheets containing 0.05% and Bi: 0.0005 to 0.05% and other unavoidable impurities was used.
Immediately after heating to 0 ° C., hot rolling was performed to obtain a hot rolled sheet of 2.3 mm.
【００４１】冷延は０．３０mmおよび０．２３mmまで行
い、０．３０mmは１ステージ冷延、０．２３mmは最終冷
延率を８７．５％とする２ステージの冷延を行った。Cold rolling was performed up to 0.30 mm and 0.23 mm, 0.30 mm was 1 stage cold rolling, and 0.23 mm was 2 stage cold rolling with a final cold rolling rate of 87.5%.
【００４２】一部の物は冷延のパス間に２００℃での時
効処理を５回施した。最終冷延前に１１２０℃×２分の
高温焼鈍を行った。冷延板を引き続き８５０℃で脱炭焼
鈍を行い、ＭｇＯを主成分とする焼鈍分離剤を塗布後、
１２００℃の２次再結晶焼鈍を行った。Some of the products were aged at 200 ° C. five times during the cold rolling pass. Before the final cold rolling, high temperature annealing was performed at 1120 ° C for 2 minutes. The cold-rolled sheet is subsequently subjected to decarburization annealing at 850 ° C., and after applying an annealing separator having MgO as a main component,
Secondary recrystallization annealing at 1200 ° C was performed.
【００４３】焼鈍分離剤の残物を除去後６０×３００mm
の磁気測定試料を剪断し、８５０℃で歪取り焼鈍を行
い、続いて絶縁被膜の塗布、焼き付けを行った。一部の
試料は更に５mm間隔でレーザー照射を行って磁気測定に
供した。磁気測定試料を強酸でマクロ後結晶粒径等を測
定した。結果を表１に示す。After removing the residue of the annealing separator 60 × 300 mm
The magnetic measurement sample of No. 1 was sheared, strain relief annealing was performed at 850 ° C., and subsequently an insulating coating was applied and baked. Some of the samples were further irradiated with laser at 5 mm intervals and subjected to magnetic measurement. The magnetic measurement sample was measured with a strong acid after macro to measure the crystal grain size and the like. The results are shown in Table 1.
【００４４】[0044]
【表１】 [Table 1]
【００４５】試料番号１，６，７，８は何れもＢｉが含
有されていなく、且つ磁束密度も１．９５Ｔ未満で鉄損
特性もレーザー照射の有無にかかわらず０．３０mmおよ
び０．２３mmの従来製品の域を超えていない。Sample Nos. 1, 6, 7 and 8 did not contain Bi, had a magnetic flux density of less than 1.95 T, and had iron loss characteristics of 0.30 mm and 0.23 mm regardless of the presence or absence of laser irradiation. It does not exceed the range of conventional products.
【００４６】試料番号２，３はＢｉを含有し、磁束密度
も１．９５Ｔを超え、且つマトリックスの粗大粒面積率
が８０％を超えているのでレーザー照射後の鉄損が０．
９０W/kgをはるかに切る０．３０mm厚の製品としては素
晴らしい特性と云える。Sample Nos. 2 and 3 contain Bi, the magnetic flux density is higher than 1.95 T, and the coarse grain area ratio of the matrix is higher than 80%.
It can be said that this is an excellent property for a 0.30 mm thick product that cuts far below 90 W / kg.
【００４７】試料番号４，５はＢｉを含有し、磁束密度
が１．９５Ｔ以上でありマトリックスの粗大粒面積率も
８０％を超え、更にマトリックス粗大粒に含まれる微細
２次再結晶粒の存在率も５０％を超えているので磁区制
御なしでの鉄損が０．９５W/kg以下の０．３０mm厚の製
品としては優れた特性が得られている。Sample Nos. 4 and 5 contain Bi, the magnetic flux density is 1.95 T or more, the coarse grain area ratio of the matrix exceeds 80%, and the fine secondary recrystallized grains contained in the coarse matrix grains are present. Since the ratio also exceeds 50%, excellent characteristics are obtained as a product of 0.30 mm thickness with an iron loss of 0.95 W / kg or less without magnetic domain control.
【００４８】試料番号９，１０，１１も板厚０．２３mm
製品であるが０．３０mm製品と同様にＢｉ含有、マトリ
ックス粗大粒面積率とも本発明範囲を満足しているので
０．２３mm厚製品のレーザー照射磁区制御材として極め
て優れた製品である。Sample Nos. 9, 10 and 11 also have a plate thickness of 0.23 mm
Although it is a product, since it contains Bi and has a matrix coarse grain area ratio similar to the 0.30 mm product, it is a very excellent product as a laser irradiation domain control material for a 0.23 mm thick product.
【００４９】（実施例２）実施例１と同様な製造法で製
造した０．３０mm厚の製品を得た。磁気特性を測定後強
酸でマクロ後ラウエ法で各結晶粒の方位を測定した。結
果を表２に示す。Example 2 A 0.30 mm thick product manufactured by the same manufacturing method as in Example 1 was obtained. After measuring the magnetic properties, the orientation of each crystal grain was measured by the Laue method after macro with strong acid. The results are shown in Table 2.
【表２】 [Table 2]
【００５０】表２から明らかなように磁束密度Ｂ8 が
１．９５Ｔ以上の試料では理想ゴス方位すなわち｛１１
０｝〈００１〉からの回転角がマトリックスで５°以
下、微細結晶で１０°以下の面積率が何れも９０％以上
である。[0050] Table ideal Goss orientation i.e. {11 2 As apparent from the magnetic flux density B 8 is at a more samples 1.95T
The area ratio where the rotation angle from 0} <001> is 5 ° or less in the matrix and 10 ° or less in the fine crystals is 90% or more.
【００５１】[0051]
【発明の効果】本発明の超高磁束密度一方向性電磁鋼板
は従来製品に比べて磁束密度が極めて高く、磁区制御後
の鉄損が０．３０mm製品で０．９０W/kg以下のように極
めて優れているのみならず、方位のよい微細２次再結晶
粒を適度に含んだ場合は磁区制御なしでも０．９５W/kg
以下の優れた製品であり、トランス等の電気機器の省エ
ネルギーに寄与するところ極めて大きいと云える。The ultra-high magnetic flux density grain-oriented electrical steel sheet of the present invention has an extremely high magnetic flux density as compared with the conventional product, and the iron loss after controlling the magnetic domain is 0.90 W / kg or less in the 0.30 mm product. Not only extremely excellent, but also 0.95W / kg without magnetic domain control when it contains fine secondary recrystallized grains with good orientation.
It can be said that the following excellent products are extremely large in that they contribute to energy saving of electric devices such as transformers.
【図１】鉄損と磁束密度との関係の図表である。FIG. 1 is a chart showing the relationship between iron loss and magnetic flux density.
【図２】磁束密度と冷延方向結晶粒径との関係の図表で
ある。FIG. 2 is a chart showing the relationship between magnetic flux density and crystal grain size in the cold rolling direction.
【図３】磁束密度と冷延直角方向結晶粒径との関係の図
表である。FIG. 3 is a diagram showing a relationship between magnetic flux density and crystal grain size in the cold rolling right-angle direction.
【図４】鉄損と磁束密度との関係の図表である。FIG. 4 is a chart showing the relationship between iron loss and magnetic flux density.
Claims (3)
Ｔ以上の極めて高い値を有する一方向性電磁鋼板であっ
て、マトリックスの結晶粒径が冷延直角方向５０mm以下
５mm以上、冷延方向３００mm以下１０mm以上のものが面
積率で８０％以上を占めることを特徴とする超高磁束密
度一方向性電磁鋼板。1. By weight, Si: 2.5 to 4.0% and Bi: 0.0005 to 0.05% are contained as essential components, and the magnetic flux density B 8 is 1.95.
A grain-oriented electrical steel sheet having an extremely high value of T or more, in which the crystal grain size of the matrix is 50 mm or less in the direction perpendicular to cold rolling and 5 mm or more in the direction perpendicular to cold rolling, and 10 mm or more in the direction of cold rolling 300 mm or more occupies 80% or more in area ratio An ultra-high magnetic flux density grain-oriented electrical steel sheet characterized by the above.
微細結晶を含むものが５０％以上を占めることを特徴と
する請求項１記載の超高磁束密度一方向性電磁鋼板。2. The super high magnetic flux density unidirectional electrical steel sheet according to claim 1, wherein 50% or more of the matrix grains contain fine crystals having an average grain size of 5 mm or less.
方位の圧延面からの傾き角がＴＤ軸回りおよびＮＤ軸回
りで５°以内の結晶が面積率で９０％以上を占め、且つ
マトリックス粒内の微細結晶の（１１０）〔００１〕方
位の圧延面からの傾き角がＴＤ軸回りおよびＮＤ軸回り
で１０°以内の結晶が微細粒の９０％以上を占めること
を特徴とする請求項２記載の超高磁束密度一方向性電磁
鋼板。3. A matrix grain of (110) [001].
The crystal having an orientation angle of 5 ° or less about the TD axis and the ND axis within 5 ° occupies 90% or more in area ratio, and the rolled surface of the (110) [001] orientation of fine crystals in matrix grains 3. The ultrahigh magnetic flux density unidirectional electrical steel sheet according to claim 2, wherein crystals having an inclination angle of 10 ° or less about the TD axis and about the ND axis occupy 90% or more of the fine grains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24069892A JP3656913B2 (en) | 1992-09-09 | 1992-09-09 | Ultra high magnetic flux density unidirectional electrical steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24069892A JP3656913B2 (en) | 1992-09-09 | 1992-09-09 | Ultra high magnetic flux density unidirectional electrical steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0689805A true JPH0689805A (en) | 1994-03-29 |
| JP3656913B2 JP3656913B2 (en) | 2005-06-08 |
Family
ID=17063374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24069892A Expired - Lifetime JP3656913B2 (en) | 1992-09-09 | 1992-09-09 | Ultra high magnetic flux density unidirectional electrical steel sheet |
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| Country | Link |
|---|---|
| JP (1) | JP3656913B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0837148A2 (en) * | 1996-10-21 | 1998-04-22 | Kawasaki Steel Corporation | Grain-oriented electromagnetic steel sheet |
| EP0892072A1 (en) * | 1997-07-17 | 1999-01-20 | Kawasaki Steel Corporation | Grain-oriented electrical steel sheet excellent in magnetic characteristics and production process for same |
| EP0959142A2 (en) * | 1998-05-21 | 1999-11-24 | Kawasaki Steel Corporation | Grain oriented electromagnetic steel sheet and manufacturing method thereof |
| US7981223B2 (en) | 2001-07-16 | 2011-07-19 | Nippon Steel Corporation | Ultra-high magnetic flux density grain-oriented electrical steel sheet excellent in iron loss at a high magnetic flux density and film properties and method for producing the same |
| WO2019245044A1 (en) * | 2018-06-21 | 2019-12-26 | 日本製鉄株式会社 | Grain-oriented electrical steel sheet with excellent magnetic characteristics |
| WO2022092120A1 (en) | 2020-10-26 | 2022-05-05 | 日本製鉄株式会社 | Wound core |
| WO2022092114A1 (en) | 2020-10-26 | 2022-05-05 | 日本製鉄株式会社 | Wound core |
| CN115053000A (en) * | 2020-02-05 | 2022-09-13 | 日本制铁株式会社 | Grain-oriented electromagnetic steel sheet |
-
1992
- 1992-09-09 JP JP24069892A patent/JP3656913B2/en not_active Expired - Lifetime
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| US6929704B2 (en) | 1996-10-21 | 2005-08-16 | Jfe Steel Corporation | Grain-oriented electromagnetic steel sheet |
| US6444050B1 (en) | 1996-10-21 | 2002-09-03 | Kawasaki Steel Corporation | Grain-oriented electromagnetic steel sheet |
| EP0837148A2 (en) * | 1996-10-21 | 1998-04-22 | Kawasaki Steel Corporation | Grain-oriented electromagnetic steel sheet |
| EP0837148A3 (en) * | 1996-10-21 | 1998-07-15 | Kawasaki Steel Corporation | Grain-oriented electromagnetic steel sheet |
| US6083326A (en) * | 1996-10-21 | 2000-07-04 | Kawasaki Steel Corporation | Grain-oriented electromagnetic steel sheet |
| EP0892072A1 (en) * | 1997-07-17 | 1999-01-20 | Kawasaki Steel Corporation | Grain-oriented electrical steel sheet excellent in magnetic characteristics and production process for same |
| US6110298A (en) * | 1997-07-17 | 2000-08-29 | Kawasaki Steel Corporation | Grain-oriented electrical steel sheet excellent in magnetic characteristics and production process for same |
| EP0959142A3 (en) * | 1998-05-21 | 2003-09-17 | Kawasaki Steel Corporation | Grain oriented electromagnetic steel sheet and manufacturing method thereof |
| EP0959142A2 (en) * | 1998-05-21 | 1999-11-24 | Kawasaki Steel Corporation | Grain oriented electromagnetic steel sheet and manufacturing method thereof |
| US7981223B2 (en) | 2001-07-16 | 2011-07-19 | Nippon Steel Corporation | Ultra-high magnetic flux density grain-oriented electrical steel sheet excellent in iron loss at a high magnetic flux density and film properties and method for producing the same |
| WO2019245044A1 (en) * | 2018-06-21 | 2019-12-26 | 日本製鉄株式会社 | Grain-oriented electrical steel sheet with excellent magnetic characteristics |
| JPWO2019245044A1 (en) * | 2018-06-21 | 2021-06-17 | 日本製鉄株式会社 | Directional electrical steel sheet with excellent magnetic properties |
| CN115053000B (en) * | 2020-02-05 | 2024-04-02 | 日本制铁株式会社 | Grain oriented electromagnetic steel sheet |
| CN115053000A (en) * | 2020-02-05 | 2022-09-13 | 日本制铁株式会社 | Grain-oriented electromagnetic steel sheet |
| WO2022092120A1 (en) | 2020-10-26 | 2022-05-05 | 日本製鉄株式会社 | Wound core |
| WO2022092114A1 (en) | 2020-10-26 | 2022-05-05 | 日本製鉄株式会社 | Wound core |
| KR20230070021A (en) | 2020-10-26 | 2023-05-19 | 닛폰세이테츠 가부시키가이샤 | Cheol Shim Kwon |
| KR20230069990A (en) | 2020-10-26 | 2023-05-19 | 닛폰세이테츠 가부시키가이샤 | Cheol Shim Kwon |
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