JPH0371511B2 - - Google Patents
Info
- Publication number
- JPH0371511B2 JPH0371511B2 JP21522587A JP21522587A JPH0371511B2 JP H0371511 B2 JPH0371511 B2 JP H0371511B2 JP 21522587 A JP21522587 A JP 21522587A JP 21522587 A JP21522587 A JP 21522587A JP H0371511 B2 JPH0371511 B2 JP H0371511B2
- Authority
- JP
- Japan
- Prior art keywords
- annealing
- parts
- grain
- weight
- oriented electrical
- 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
Links
- 238000000137 annealing Methods 0.000 claims description 39
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 22
- 229910001224 Grain-oriented electrical steel Inorganic materials 0.000 claims description 17
- 239000000395 magnesium oxide Substances 0.000 claims description 10
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 8
- 239000011521 glass Substances 0.000 description 21
- 239000011248 coating agent Substances 0.000 description 15
- 238000000576 coating method Methods 0.000 description 14
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000004080 punching Methods 0.000 description 7
- 238000005261 decarburization Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000008119 colloidal silica Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Landscapes
- Chemical Treatment Of Metals (AREA)
Description
（産業上の利用分野）
本発明は方向性電磁鋼板の仕上焼鈍の際に用い
られる焼鈍分離剤に係わり、グラス被膜を生成さ
せず打抜き性のすぐれた方向性電磁鋼板を得るこ
とのできる焼鈍分離剤に関するものである。
（従来の技術）
方向性電磁鋼板は一般に次のようにして製造さ
れる。即ち、Siを4.0％以下含有する珪素鋼スラ
ブを熱延し、焼鈍して１回または中間焼鈍を挟ん
で２回以上冷延して最終板厚とし、脱炭焼鈍を行
つて鋼板表面にSiO2を含む酸化膜を生成させ、
次いでMgOを主成分とする焼鈍分離剤を塗布し
て乾燥し、コイルに捲取り、その後、高温の仕上
焼鈍を行い、ゴス方位の２次再結晶粒を発達させ
るとともにグラス被膜を形成させ、次いで必要に
応じて絶縁コーテイング液を塗布して焼付け処理
を行つて絶縁コーテイング被膜を形成させる。
方向性電磁鋼板は発電機、変圧器などの電気機
器の鉄心材として使用されるが、鉄心は通常、金
型による打抜き、あるいは剪断により所定形状と
された鉄心単板を多数積層して製作される。例え
ばタービン発電機の鉄心を製作する場合には、そ
の容量にもよるが所定形状に打抜きされた鉄心単
板を10〜20万枚程度必要とする。またこれらは打
抜き返りが所定値、例えば50μ以下であること
が、タービン発電機などの当該鉄心単板を積層し
た場合の端面短絡による鉄損の異常増加防止等に
対して重要である。
ところで方向性電磁鋼板の表面にはグラス被膜
あるいは該被膜と絶縁コーテイング被膜の２重の
絶縁被膜が形成されている。グラス被膜は硬質で
あるため打抜きを行う場合に金型の摩耗が激し
い。そのため、例えば数1000回打抜くと打抜き返
りが発生し、金型の再研摩あるいは取替を行わな
ければならない。これは、作業性を著しく低下さ
せ、またコスト上昇を招くなどの問題がある。
グラス被膜の形成を抑制する焼鈍分離剤として
は特開昭59−96278号公報に開示のものがある。
これは脱炭焼鈍にて生成した鋼板表面の酸化膜中
のSiO2と反応性が弱いAl2O3と、1300℃以上の高
温で焼成し活性度を低下させたMgOとからなる
焼鈍分離剤である。これによると、それなりの作
用効果があり、フオルステライト被膜（グラス被
膜）の形成が抑制されるということである。
（発明が解決しようとする問題点）
しかしながら、これまでのグラス被膜形成を抑
制する焼鈍分離剤では、脱炭焼鈍の温度、時間、
雰囲気ガスの露点などが実操業で変化があり、酸
化膜の厚さが鋼板の幅方向あるいは長さ方向でム
ラを生じたときには、部分的にとくに酸化膜が厚
い箇所にグラス被膜が形成されることがある。
本発明は、脱炭焼鈍により方向性電磁鋼板に形
成された酸化膜に厚さムラが生じても、グラス被
膜が生成せず、打抜き性がすぐれ、あわせて磁気
特性も良好となる焼鈍分離剤の提供を目的とす
る。
（問題点を解決するための手段）
本発明の要旨とするところは下記のとおりであ
る。
(1) マグネシア100重量部に対して、CaCl2を２
〜40重量部配合してなる方向性電磁鋼板用の焼
鈍分離剤。
(2) マグネシア100重量部に対して、CaCl2に
BaCl2、LiCl2、KClの一種または二種以上を添
加したものを合計で２〜40重量部配合してなる
方向性電磁鋼板用の焼鈍分離剤。
この焼鈍分離剤によると、方向性電磁鋼板の仕
上焼鈍過程で、鋼板表面の酸化膜中のSiO2とマ
グネシア（MgO）との反応により生成されてい
たグラス被覆が、前記焼鈍分離剤中の塩化物の
SiO2へのエツチング作用のために形成されず、
打抜き性のすぐれた方向性電磁鋼板が得られる。
以下に、本発明について詳細に説明する。
方向性電磁鋼板は、一般に、熱延後焼鈍して１
回あるいは中間焼鈍を挟んで２回以上の冷延にて
最終板厚とされ、脱炭焼鈍され、その後、焼鈍分
離剤が塗布され、コイルに捲取られ仕上焼鈍され
る。
そこで、本発明の焼鈍分離剤は、仕上焼鈍での
鋼板の焼付き防止、および鋼中の不純物の除去の
ためにマグネシア（MgO）を配合する。このマ
グネシア100重量部に対して、CaCl2を２〜40重
量部配合するか、あるいはCaCl2にBaCl2、
LiCl2、KClの一種または二種以上を添加したも
のを合計で２〜40重量部配合する。
CaCl2あるいはCaCl2にBaCl2、LiCl2、KClの
一種または二種以上を添加したものをマグネシア
100重量部に対して２重量部以上配合すると、仕
上焼鈍でマグネシアと鋼板表面の酸化膜中の
SiO2の反応が抑制され、グラス被膜が生じない。
この作用は前記塩化物が仕上焼鈍の加熱時に
SiO2を分解しグラス被膜の形成を防止するとこ
ろにある。
該作用を奏するにはマグネシア100重量部に対
して２重量部以上が必要である。これ未満では密
着性のあるグラス被膜が形成されたり、あるいは
部分的にグラス被膜が形成され外観が不均一とな
り打抜性が劣化する。
一方、この配合量が多くなると、仕上焼鈍で焼
付きが生じる。また絶縁コーテイング液を塗布し
熱処理して絶縁被膜を形成する際、その前処理の
ライトピツクル（軽酸洗）での焼鈍分離剤の除去
が困難となる。これらを防止するために40重量部
以下とする。
この焼鈍分離剤を塗布し、仕上焼鈍すると方向
性電磁鋼板には、脱炭焼鈍の際、酸化膜の厚みム
ラがあつても、鋼板の全面、全長にわたつてグラ
ス被膜の形成がなく、打抜き性に優れたものとな
る。
また、本発明の焼鈍分離剤は方向性電磁鋼板に
塗布する手段は任意であり、例えばスラリー状に
して塗布するかあるいは、静電塗布手段などが採
用される。
（実施例）
次に実施例を示す。
実施例 １
Ｃ 0.046％、Si3.12％、Mn0.057％、Ｓ
0.022％を含有し、残部がFeおよび不可避的不純
物よりなる方向性電磁鋼板素材を2.3mm厚に熱延
し、次いで980℃、３分間の中間焼鈍を挟む２回
の冷間圧延を行つて、板厚0.35mmの冷延板とし
た。次いで湿水素雰囲気中で脱炭焼鈍を行つた。
次いでこの鋼板に、表１の組成からなる焼鈍分離
剤を塗布した後、1200℃・20時間の最終焼鈍を行
つた。その後、連続ヒートフラツトニングにおい
て、リン酸塩＋コロイド状シリカ系コーテイング
を、焼付後重量で２ｇ／m2を割合で塗布焼付し
た。
得られた各鋼板の外観、打抜性および磁気特性
について調べた結果も合わせて表１に示す。
(Industrial Application Field) The present invention relates to an annealing separator used during finish annealing of grain-oriented electrical steel sheets, and the present invention relates to an annealing separation agent that is capable of producing grain-oriented electrical steel sheets with excellent punchability without forming a glass film. This is related to drugs. (Prior Art) Grain-oriented electrical steel sheets are generally manufactured as follows. That is, a silicon steel slab containing 4.0% or less of Si is hot-rolled, annealed and cold-rolled once or twice or more with an intermediate annealing to obtain the final thickness, and decarburized annealed to add SiO to the surface of the steel sheet. generates an oxide film containing 2 ,
Next, an annealing separator mainly composed of MgO is applied, dried, and wound into a coil.Final annealing is then performed at a high temperature to develop secondary recrystallized grains with Goss orientation and to form a glass coating. If necessary, an insulating coating liquid is applied and a baking process is performed to form an insulating coating film. Grain-oriented electrical steel sheets are used as iron core materials for electrical equipment such as generators and transformers, but iron cores are usually manufactured by laminating a large number of single iron core sheets that have been cut into a predetermined shape by die-cutting or shearing. Ru. For example, when manufacturing an iron core for a turbine generator, approximately 100,000 to 200,000 to 200,000 core veneers are required, each punched into a predetermined shape, depending on its capacity. In addition, it is important that the punching back is less than a predetermined value, for example, 50μ, in order to prevent an abnormal increase in iron loss due to end short circuit when the iron core single plates are laminated in a turbine generator or the like. By the way, a glass coating or a double insulation coating consisting of the glass coating and an insulating coating coating is formed on the surface of the grain-oriented electrical steel sheet. Since the glass coating is hard, the mold is subject to severe wear when punching. For this reason, for example, after punching several thousand times, punching returns occur and the die must be reground or replaced. This poses problems such as a significant decrease in workability and an increase in costs. An annealing separator that suppresses the formation of a glass film is disclosed in JP-A-59-96278.
This is an annealing separator consisting of Al 2 O 3 , which is weakly reactive with SiO 2 in the oxide film on the surface of the steel sheet generated during decarburization annealing, and MgO, whose activity has been reduced by firing at a high temperature of 1300°C or higher. It is. According to this, there is a certain effect and the formation of a forsterite film (glass film) is suppressed. (Problems to be Solved by the Invention) However, with conventional annealing separators that suppress glass film formation, the decarburization annealing temperature, time,
When the dew point of the atmospheric gas changes during actual operation and the thickness of the oxide film becomes uneven in the width or length direction of the steel plate, a glass film is formed in some areas where the oxide film is particularly thick. Sometimes. The present invention provides an annealing separator that does not form a glass film even if the thickness of the oxide film formed on grain-oriented electrical steel sheets due to decarburization annealing is excellent, has excellent punching properties, and has good magnetic properties. The purpose is to provide. (Means for solving the problems) The gist of the present invention is as follows. (1) Add 2 parts of CaCl 2 to 100 parts by weight of magnesia.
An annealing separator for grain-oriented electrical steel sheets containing ~40 parts by weight. (2) For 100 parts by weight of magnesia, add CaCl 2
An annealing separator for grain-oriented electrical steel sheets, which contains a total of 2 to 40 parts by weight of one or more of BaCl 2 , LiCl 2 , and KCl. According to this annealing separator, during the final annealing process of grain-oriented electrical steel sheets, the glass coating that was generated by the reaction between SiO 2 in the oxide film on the surface of the steel sheet and magnesia (MgO) is removed by the chloride in the annealing separator. of things
Not formed due to etching action on SiO2 ,
A grain-oriented electrical steel sheet with excellent punchability can be obtained. The present invention will be explained in detail below. Grain-oriented electrical steel sheets are generally annealed after hot rolling.
The final plate thickness is obtained by cold rolling twice or more with intermediate annealing in between, and decarburization annealing is performed. After that, an annealing separator is applied, and the material is wound into a coil and final annealed. Therefore, the annealing separator of the present invention contains magnesia (MgO) to prevent seizure of the steel plate during final annealing and to remove impurities in the steel. 2 to 40 parts by weight of CaCl 2 is added to 100 parts by weight of this magnesia, or BaCl 2 or BaCl 2 is added to CaCl 2 .
A total of 2 to 40 parts by weight of one or more of LiCl 2 and KCl is added. Magnesia is CaCl 2 or CaCl 2 with one or more of BaCl 2 , LiCl 2 , and KCl added.
If 2 parts by weight or more is added to 100 parts by weight, the magnesia and oxide film on the surface of the steel sheet will be removed during final annealing.
The reaction of SiO 2 is suppressed and no glass film is formed.
This effect is caused by the chloride being heated during finish annealing.
Its purpose is to decompose SiO 2 and prevent the formation of a glass film. In order to exhibit this effect, 2 parts by weight or more is required per 100 parts by weight of magnesia. If it is less than this, an adhesive glass film will be formed, or a glass film will be formed partially, resulting in non-uniform appearance and poor punchability. On the other hand, if this amount is increased, seizure will occur during final annealing. Furthermore, when an insulating coating liquid is applied and heat treated to form an insulating film, it becomes difficult to remove the annealing separating agent in the pretreatment light pickling. To prevent these, the amount should be 40 parts by weight or less. When this annealing separator is applied and finish annealed, even if there is uneven thickness of the oxide film during decarburization annealing, a grain-oriented electrical steel sheet will not have a glass film formed over the entire surface and length of the steel sheet, and will not be punched. Becomes excellent in sex. Further, the annealing separator of the present invention can be applied to the grain-oriented electrical steel sheet by any means. For example, it can be applied in the form of a slurry, or electrostatic application can be used. (Example) Next, an example will be shown. Example 1 C 0.046%, Si 3.12%, Mn 0.057%, S
A grain-oriented electrical steel sheet material containing 0.022% Fe and unavoidable impurities is hot-rolled to a thickness of 2.3 mm, and then cold-rolled twice at 980°C with an intermediate annealing period of 3 minutes in between. A cold-rolled plate with a thickness of 0.35 mm was used. Next, decarburization annealing was performed in a wet hydrogen atmosphere.
Next, this steel plate was coated with an annealing separator having the composition shown in Table 1, and then final annealed at 1200°C for 20 hours. Then, in continuous heat flattening, a phosphate + colloidal silica coating was applied and baked at a rate of 2 g/m 2 after baking. Table 1 also shows the results of examining the appearance, punchability, and magnetic properties of each steel sheet obtained.
【表】
する打抜回数
表１から明らかなように、この発明に従う成分
配合割合を満足する焼鈍分離剤（No.１〜７）を用
いた場合はいずれも、従来完全な被膜を作るため
の焼鈍分離剤を用いた比較例（No.１）に対しては
勿論のこと、従来下地被膜をつくらないといわれ
ている比較例（No.２）に比べて、グラス被膜を形
成しない金属光沢を有する鋼板が得られ、打抜性
が良好であつた。
また磁気特性（磁束密度B10および鉄損W17/50
値）も本発明によるものは良好であつた。
このように本発明による材料は、表面にグラス
被膜が全くないため打抜性を向上させるばかりで
なく、磁化過程における磁壁の移動を容易にし、
磁気特性をも改善するものと考えられる。
実施例 ２
実施例１と同様にして得られた板厚0.35mmの脱
炭焼鈍板を供試材とした。この脱炭焼鈍板に表２
に示す配合割合の焼鈍分離剤を鋼板片面当り８
ｇ／m2の割合で塗布後1200℃×20hrの最終焼鈍を
行つた。次いで連続ヒートフラツトニングライン
でリン酸アルミニウム＋コロイド状シリカ＋クロ
ム酸系の無機コーテイング剤を２ｇ／m2の割合で
塗布焼付した。得られた成品板の外観、打抜性、
磁気特性を表２に示す。
なお打抜性の判定は実施例１の場合と同じであ
る。[Table] As is clear from Table 1, when using the annealing separators (Nos. 1 to 7) that satisfy the component blending ratio according to the present invention, the number of punchings required to form a complete film is Of course, compared to the comparative example (No. 1) using an annealing separator, as well as the comparative example (No. 2), which is said to not form a base film, we achieved a metallic luster that does not form a glass film. A steel plate having the following characteristics was obtained, and the punchability was good. Also magnetic properties (magnetic flux density B 10 and iron loss W 17/50
(value) was also good for those according to the present invention. In this way, the material according to the present invention not only improves punchability because it has no glass coating on its surface, but also facilitates the movement of domain walls during the magnetization process.
It is thought that it also improves magnetic properties. Example 2 A decarburized annealed plate with a thickness of 0.35 mm obtained in the same manner as in Example 1 was used as a test material. Table 2 shows this decarburized annealed plate.
8 per side of the steel plate using the annealing separator in the proportion shown in
After coating at a rate of g/m 2 , final annealing was performed at 1200° C. for 20 hours. Next, an inorganic coating agent of aluminum phosphate, colloidal silica, and chromic acid was applied and baked at a rate of 2 g/m 2 on a continuous heat flattening line. The appearance, punchability, and
The magnetic properties are shown in Table 2. Note that the punchability was determined in the same manner as in Example 1.
【表】
CaCl2 ２％添加材ではわずかにグラス被膜の
形成はあつたが、打抜性改善は大きく、CaCl2
５％以上の添加では全くグラス被膜の形成がな
く、均一な金属面が露出しており、外観もよく打
抜性も非常に良い結果が得られた。
（発明の効果）
以上のように本発明によると、グラス被膜の形
成がなく、打抜き性が極めてすぐれた方向性電磁
鋼板が得られる。[Table] Although a glass film was slightly formed with the CaCl 2 2% additive material, the punching performance was greatly improved.
When the addition amount was 5% or more, no glass film was formed at all, and a uniform metal surface was exposed, giving good appearance and very good punchability. (Effects of the Invention) As described above, according to the present invention, a grain-oriented electrical steel sheet without the formation of a glass film and having extremely excellent punchability can be obtained.
Claims (1)
〜40重量部配合してなる方向性電磁鋼板用の焼鈍
分離剤。 ２ マグネシア100重量部に対して、CaCl2に
BaCl2、LiCl2、KClの一種または二種以上を添加
したものを合計で２〜40重量部配合してなる方向
性電磁鋼板用の焼鈍分離剤。[Claims] 1 2 parts of CaCl 2 to 100 parts by weight of magnesia
An annealing separator for grain-oriented electrical steel sheets containing ~40 parts by weight. 2 For 100 parts by weight of magnesia, add CaCl 2
An annealing separator for grain-oriented electrical steel sheets, which contains a total of 2 to 40 parts by weight of one or more of BaCl 2 , LiCl 2 , and KCl.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21522587A JPS6462476A (en) | 1987-08-31 | 1987-08-31 | Separation at annealing agent for grain-oriented magnetic steel sheet |
| DE8888114129T DE3875676T2 (en) | 1987-08-31 | 1988-08-30 | METHOD FOR PRODUCING CORNORIENTED STEEL SHEETS WITH METAL GLOSS AND EXCELLENT PUNCHABILITY. |
| EP88114129A EP0305966B1 (en) | 1987-08-31 | 1988-08-30 | Method for producing grain-oriented electrical steel sheet having metallic luster and excellent punching property |
| US07/239,191 US4875947A (en) | 1987-08-31 | 1988-08-31 | Method for producing grain-oriented electrical steel sheet having metallic luster and excellent punching property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21522587A JPS6462476A (en) | 1987-08-31 | 1987-08-31 | Separation at annealing agent for grain-oriented magnetic steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6462476A JPS6462476A (en) | 1989-03-08 |
| JPH0371511B2 true JPH0371511B2 (en) | 1991-11-13 |
Family
ID=16668779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21522587A Granted JPS6462476A (en) | 1987-08-31 | 1987-08-31 | Separation at annealing agent for grain-oriented magnetic steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6462476A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2691837B2 (en) * | 1992-11-12 | 1997-12-17 | 新日本製鐵株式会社 | Method for manufacturing high magnetic flux density grain-oriented electrical steel sheet with good workability |
| JP7196622B2 (en) * | 2019-01-16 | 2022-12-27 | 日本製鉄株式会社 | Grain-oriented electrical steel sheet and method for producing grain-oriented electrical steel sheet |
| CN113388725B (en) | 2021-06-18 | 2022-12-02 | 协和化学工业株式会社 | Method for producing annealing separator, and grain-oriented electromagnetic steel sheet |
-
1987
- 1987-08-31 JP JP21522587A patent/JPS6462476A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6462476A (en) | 1989-03-08 |
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