JPS636611B2 - - Google Patents
Info
- Publication number
- JPS636611B2 JPS636611B2 JP60226953A JP22695385A JPS636611B2 JP S636611 B2 JPS636611 B2 JP S636611B2 JP 60226953 A JP60226953 A JP 60226953A JP 22695385 A JP22695385 A JP 22695385A JP S636611 B2 JPS636611 B2 JP S636611B2
- Authority
- JP
- Japan
- Prior art keywords
- etching
- acid solution
- electrical steel
- steel strip
- pickling
- 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
- 238000000034 method Methods 0.000 claims description 42
- 238000005530 etching Methods 0.000 claims description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 34
- 239000007921 spray Substances 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 17
- 229910052742 iron Inorganic materials 0.000 claims description 16
- 239000002253 acid Substances 0.000 claims description 11
- 229910001224 Grain-oriented electrical steel Inorganic materials 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 6
- 238000004090 dissolution Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- 238000005554 pickling Methods 0.000 description 16
- 229910000976 Electrical steel Inorganic materials 0.000 description 14
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 12
- 229910017604 nitric acid Inorganic materials 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 238000000137 annealing Methods 0.000 description 10
- 239000010953 base metal Substances 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 238000007654 immersion Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Heat Treatment Of Sheet Steel (AREA)
- ing And Chemical Polishing (AREA)
- Chemical Treatment Of Metals (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、歪取り焼鈍を行つても鉄損特性が
低下しない方向性電磁鋼板の製造分野に属するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention belongs to the field of manufacturing grain-oriented electrical steel sheets whose core loss characteristics do not deteriorate even after strain relief annealing.
方向性電磁鋼板においてエネルギー節約の観点
から鉄損を低減することが重要である。鉄損を低
減する方法としてはレーザー照射等の手段により
磁区を細分化する方法が既に特開昭58−26405号
公報に開示されているが、該方法による鉄損の低
減はレーザー照射により導入された歪みに起因し
ている。したがつて歪取り焼鈍を必要としない積
鉄心トランス用として使用出来るが、歪取り焼鈍
を必要とする巻き鉄心トランス用としては使用出
来ない。本出願人はこの問題を解決し、歪取り焼
鈍を行つても鉄損特性が低下しない低鉄損一方向
性電磁鋼板の製造方法を既に提案済みである（特
願昭59−236973号）。上記提案の方法の要旨は、
(1)仕上焼鈍済の一方向性電磁鋼板又は仕上焼鈍
後、絶縁皮膜処理を施こした一方向性電磁鋼板の
地鉄の一部を除去し、次いで該鋼板にリン酸系張
力付加皮膜処理を施すこと(2)鋼板表面の皮膜の一
部を剥離した後、酸洗する(1)項の方法等である。
In grain-oriented electrical steel sheets, it is important to reduce iron loss from the viewpoint of energy conservation. As a method for reducing iron loss, a method of subdividing magnetic domains by means such as laser irradiation has already been disclosed in Japanese Patent Application Laid-Open No. 58-26405. This is caused by distortion. Therefore, it can be used for laminated core transformers that do not require strain relief annealing, but cannot be used for wound core transformers that require strain relief annealing. The present applicant has already proposed a method for manufacturing a unidirectional electrical steel sheet with low core loss in which the core loss characteristics do not deteriorate even after strain relief annealing to solve this problem (Japanese Patent Application No. 59-236973). The gist of the above proposed method is:
(1) A part of the base iron of a finish annealed unidirectional electrical steel sheet or a unidirectional electrical steel sheet that has been subjected to an insulation coating treatment after finish annealing is removed, and then the steel plate is treated with a phosphoric acid-based tension coating. (2) After peeling off a part of the film on the surface of the steel plate, it is pickled using the method described in (1).
この発明において工業的に実施が容易であり、
且つすぐれた特性が得られる方法の組合せは、(1)
張力絶縁皮膜を施した一方向性電磁鋼帯を用いる
こと、(2)皮膜の一部の剥離除去をレーザー照射に
より行なうこと（照射痕跡の形成）(3)皮膜剥離部
の地鉄の除去を酸洗法により行なうこと、を組合
せて実施する方法である。上記の方法により歪取
り焼鈍を行つても鉄損特性が低下しない一方向性
電磁鋼帯が工業的に容易に且つ安定して得られる
ようになつた。 This invention is easy to implement industrially,
The combination of methods that can obtain excellent properties is (1)
Using a unidirectional electromagnetic steel strip coated with a tension insulation coating, (2) removing a portion of the coating by laser irradiation (formation of irradiation traces), and (3) removing the base metal in the area where the coating has peeled off. This is a method that is carried out in combination with the pickling method. By the above method, it has become possible to industrially easily and stably obtain a unidirectional electrical steel strip whose core loss characteristics do not deteriorate even after strain relief annealing.
所が上記の方法は、実施にさいして、レーザー
照射工程に引続き一般に広く採用されている浸漬
方式の酸洗工程を一連に設けて連続処理した場
合、次記の如き問題点を有するものである。
However, the above method has the following problems when the laser irradiation process is followed by a generally widely used immersion pickling process. .
周知の如く浸漬酸洗を行なうと被酸洗材からの
鉄分が酸洗液に溶解し、その濃度が高くなつて酸
洗液の酸洗能が次第に低下していく。従来から一
般的に採用されている浸漬酸洗方法で酸洗濃低下
対策をとるには、通板速度を遅くして浸漬時間を
増す方法、新液を供給する方法等があるが、上記
本発明が対象とする処理工程に於いて一方向性電
磁鋼帯の通板速度が変動するということは、レー
ザービーム照射条件（照射ピツチ）及び後続の皮
膜焼付条件が変ることを意味し、諸特性にバラツ
キが生じ、安定生産に支障を来たすものである。 As is well known, when immersion pickling is performed, iron from the material to be pickled is dissolved in the pickling solution, its concentration increases, and the pickling ability of the pickling solution gradually decreases. Measures to reduce the concentration of pickling using the conventionally commonly used immersion pickling method include methods such as slowing down the threading speed and increasing the immersion time, and supplying new solution. The fact that the threading speed of the unidirectional electrical steel strip varies in the treatment process covered by the invention means that the laser beam irradiation conditions (irradiation pitch) and the subsequent coating baking conditions change, which may affect various properties. This causes variations in production, which hinders stable production.
かゝる問題を回避するためには、通板速度の変
動に応じてレーザービーム照射条件並びに皮膜焼
付条件を変更することも考えられるが、しかしこ
れは極めて困難なことであり、工業的ではない。 In order to avoid such problems, it may be possible to change the laser beam irradiation conditions and film baking conditions according to fluctuations in the sheet passing speed, but this is extremely difficult and not industrially possible. .
更にレーザービーム照射後の一方向性電磁鋼帯
のエツチングは巾或いは径が0.5mm以下といつた
小痕跡群内の地鉄のエツチングであり、浸漬酸洗
では小痕跡から気泡が発生して、酸液と地鉄面と
の接触がさまたげられ効率よく酸洗ができない。 Furthermore, the etching of the unidirectional electrical steel strip after laser beam irradiation is the etching of the base metal within a group of small traces with a width or diameter of 0.5 mm or less, and bubbles are generated from the small traces during immersion pickling. Contact between the acid solution and the surface of the steel substrate is blocked, making it impossible to pickle efficiently.
したがつて本発明の主目的は、酸液のエツチン
グ能が次第に低下しても、一方向性電磁鋼帯の通
板速度を遅くすることなく、つまり通板速度を常
に一定にして、レーザービーム照射条件及び皮膜
焼付条件等を一定に保ちつゝ、効率よく酸洗処理
を行なうところにある。 Therefore, the main purpose of the present invention is to maintain the threading speed of the unidirectional electrical steel strip at a constant level even if the etching ability of the acid solution gradually decreases, that is, to keep the threading speed constant so that the laser beam The purpose is to efficiently carry out pickling treatment while keeping irradiation conditions, film baking conditions, etc. constant.
本発明の方向性電磁鋼板の処理方法の要旨は次
のとおりである。
The gist of the method for treating grain-oriented electrical steel sheets of the present invention is as follows.
絶縁皮膜を有する方向性電磁鋼帯の表面に多数
の痕跡を形成する処理と、その後の酸液を循環使
用する通板方向に配列された多数本のスプレーノ
ズルによる上記痕跡部の地鉄のエツチング処理と
を行い、上記酸液の循環使用によるエツチング能
の変化を酸液中の鉄分濃度検出により、又は製品
サンプルの溶解深さにより検出する段階を行い、
前記エツチング処理を通板方向のスプレーノズル
の使用本数を前記エツチング能の変化に応じて増
加させることにより、前記痕跡形成処理並びに前
記エツチング処理とその後の絶縁皮膜再塗布処理
の一連の処理を通板速度一定の下で連続的に行う
ことを特徴とする、方向性電磁鋼板の処理方法で
ある。上記痕跡形成はレーザー照射、電子ビー
ム、放電加工等で行ないうるが、以下主としてレ
ーザー照射の場合についてこの発明の内容及び作
用を詳しく説明する。第１図はこの発明方法を実
施するライン構成の一例を示し、図面左から１は
コイル巻戻し装置、Ｓは巻戻された絶縁皮膜を有
する高磁束密度一方向性電磁鋼帯、２はレーザー
ビーム照射装置、３はエツチング装置、４は水洗
及びドライヤー、５は絶縁皮膜再塗布装置、６は
焼付炉、７は巻取り装置である。 A process of forming a large number of marks on the surface of a grain-oriented electrical steel strip having an insulating film, followed by etching of the base metal at the marked parts using a large number of spray nozzles arranged in the threading direction using circulating acid solution. and detecting the change in etching ability due to the circulating use of the acid solution by detecting the iron concentration in the acid solution or by the dissolution depth of the product sample,
By increasing the number of spray nozzles used in the sheet passing direction during the etching process in accordance with the change in the etching ability, a series of processes including the trace forming process, the etching process, and the subsequent insulating film reapplication process can be completed. This is a method for processing grain-oriented electrical steel sheets, which is characterized by continuous processing at a constant speed. The above-mentioned trace formation can be carried out by laser irradiation, electron beam, electric discharge machining, etc., but the content and operation of the present invention will be explained below in detail mainly in the case of laser irradiation. FIG. 1 shows an example of a line configuration for carrying out the method of the present invention, in which 1 from the left of the figure is a coil unwinding device, S is a high magnetic flux density unidirectional electrical steel strip having an unwound insulating film, and 2 is a laser. A beam irradiation device, 3 an etching device, 4 a washing and drying device, 5 an insulating film recoating device, 6 a baking furnace, and 7 a winding device.
レーザービーム照射装置２でのレーザー痕跡の
形成は圧延方向に対して直角方向が良く、又痕跡
は線状でも点状でも良い。痕跡の圧延方向の間隔
は約2.5〜10mm程度が良く、点状の場合には、点
と点の間隔は0.7mm以下が望ましい。痕跡形成面
は片面でも両面でも良く、本例では片面（上面）
の例を示している。 The laser traces are preferably formed in the laser beam irradiation device 2 in a direction perpendicular to the rolling direction, and the traces may be linear or dotted. The spacing of the traces in the rolling direction is preferably about 2.5 to 10 mm, and in the case of dots, the spacing between the dots is preferably 0.7 mm or less. The trace forming surface may be on one side or both sides, and in this example, it is on one side (top side).
An example is shown.
かくして片面にレーザー痕跡が形成された鋼帯
Ｓはエツチング装置３で痕跡部の地鉄の溶解除去
が行われる。こゝで使用するエツチング液として
は、絶縁皮膜を溶解しないものが良く、硝酸溶液
が最適である。硝酸溶液の濃度は20〜70wt％が
好ましい。これは20wt％以下ではエツチング速
度が遅くて工業的に採用し難く、一方70wt％以
上では発煙の問題がある。より好ましいのは30〜
60wt％である。また硝酸溶液の温度は20〜50℃
とすることができる。このエツチング装置３に
は、鋼帯Ｓ上にスプレーノズル８が多数本あり、
硝酸溶液のスプレーによりエツチングが行われ
る。１０はエツチング液の循環タンクで、配管１
１により接続され、ポンプ１３により各スプレー
ノズル８に循環供給される。各スプレーノズル８
の入側配管にはバルブ９が設けられ、エツチング
液中の鉄濃度或いは、所望するエツチング深さに
応じてバルブ９を選択操作して使用するスプレー
の通板方向の本数を選択する。尚、図中１２は加
熱器で液温が一定に維持される。（30〜70℃）以
降は上に述べた順で処理されコイルに巻取られ
る。かくして処理された高磁束密度一方向性電磁
鋼板は、歪取り焼鈍を行つても鉄損が低下しない
という特性を有するものである。 The steel strip S with the laser traces formed on one side thereof is subjected to the etching device 3 to melt and remove the base metal at the traces. The etching solution used here should preferably be one that does not dissolve the insulating film, and a nitric acid solution is most suitable. The concentration of the nitric acid solution is preferably 20 to 70 wt%. If the etching rate is less than 20 wt%, the etching rate is slow and it is difficult to use it industrially, while if it is more than 70 wt%, there is a problem of smoke generation. More preferable is 30~
It is 60wt%. Also, the temperature of the nitric acid solution is 20 to 50℃
It can be done. This etching device 3 has a large number of spray nozzles 8 on the steel strip S.
Etching is carried out by spraying with nitric acid solution. 10 is a circulation tank for etching liquid, and piping 1
1, and is circulated and supplied to each spray nozzle 8 by a pump 13. Each spray nozzle 8
A valve 9 is provided on the inlet pipe of the etching solution, and the number of sprays to be used in the plate passing direction is selected by selectively operating the valve 9 in accordance with the iron concentration in the etching solution or the desired etching depth. In addition, 12 in the figure is a heater to maintain the liquid temperature constant. (30 to 70°C) and thereafter are processed in the order described above and wound into a coil. The high magnetic flux density unidirectional electrical steel sheet treated in this manner has a characteristic that the core loss does not decrease even when strain relief annealing is performed.
本発明の特徴は上記の説明からも明らかな如
く、通板速度を終始一定にして、レーザービーム
照射装置２での痕跡形成条件並びに皮膜焼付条件
等を一定にするところにある。そして例えばエツ
チング装置３でスプレーノズル８群から鋼帯Ｓに
スプレーされた硝酸溶液の循環使用につれて鉄分
が増加してエツチング能が低下して痕跡内の地鉄
の溶解深さが所望値よりも浅くなつてくると、硝
酸溶液中の鉄分濃度の検出により又は製品サンプ
ルの溶解深さの測定値により、バルブ９を操作し
て使用するスプレーノズル８の本数を通板方向に
増加して痕跡内の地鉄の溶解深さを一定に保つも
のである。 As is clear from the above description, the feature of the present invention is that the sheet passing speed is kept constant from beginning to end, so that the conditions for forming marks in the laser beam irradiation device 2, the conditions for burning the film, etc. are kept constant. For example, as the nitric acid solution sprayed onto the steel strip S from the 8 groups of spray nozzles in the etching device 3 is recycled, the iron content increases, the etching ability decreases, and the dissolution depth of the base iron in the trace becomes shallower than the desired value. As the age increases, the number of spray nozzles 8 to be used increases in the direction of passing through the plate by operating the valve 9 based on the detection of the iron concentration in the nitric acid solution or the measured value of the dissolution depth of the product sample. This is to keep the melting depth of the base metal constant.
この様に本発明方法を実施することにより、レ
ーザービーム照射による痕跡形成条件を一定に保
つことができると共に、痕跡内の地鉄の溶解条件
をも一定に保つことができ、磁気特性が高位に安
定した一方向性電磁鋼帯が工業的に容易に得られ
るものである。 By carrying out the method of the present invention in this way, it is possible to keep the conditions for forming traces by laser beam irradiation constant, and also to keep the conditions for dissolving the base metal within the traces constant, resulting in high magnetic properties. A stable unidirectional electrical steel strip can be easily obtained industrially.
しかも、本発明の如き特殊なエツチングに対し
ては、スプレー法では浸漬方式と異なりエツチン
グ時痕跡からの気泡が洗い流され、又痕跡に絶え
ず新鮮な酸液の供給が可能となり、第２図に示す
如く酸洗時間の短縮が計られるものである。 Moreover, for special etching like the one in the present invention, the spray method, unlike the dipping method, washes away air bubbles from the traces during etching, and it is possible to constantly supply fresh acid solution to the traces, as shown in Figure 2. Thus, the pickling time can be shortened.
又、通板速度が終始一定であることにより、絶
縁皮膜焼付炉６での焼付条件を安定化することが
でき、均質な絶縁皮膜の形成が可能となる。 Further, since the sheet passing speed is constant throughout, the baking conditions in the insulation film baking furnace 6 can be stabilized, and a homogeneous insulation film can be formed.
従つて、本発明によれば、各処理を一定条件で
かつ安定して行うことが出来、その結果、歪取り
焼鈍後の鉄損特性低下防止に寄与する作用機構を
安定して形成することができるものである。 Therefore, according to the present invention, each treatment can be performed stably under constant conditions, and as a result, it is possible to stably form a working mechanism that contributes to preventing a decrease in iron loss characteristics after strain relief annealing. It is possible.
更に、緊急ライン停止を行つた場合にも、スプ
レー法ではスプレーの停止により迅速に硝酸溶液
の鋼帯Ｓへの供給中断ができ、且つ後続の水洗に
より過剰なエツチングによる鋼帯Ｓの穴明き、破
断が効果的に防止できるという効果を奏するもの
である。 Furthermore, even in the event of an emergency line shutdown, the spray method can quickly interrupt the supply of nitric acid solution to the steel strip S by stopping the spray, and the subsequent water washing can prevent holes in the steel strip S due to excessive etching. This has the effect that breakage can be effectively prevented.
鉄鋼の酸洗として、一部にスプレー酸洗が用い
られていることは、例えば特公昭59−11671号に
より公知である。本発明は、このスプレー酸洗方
式を、絶縁皮膜を有する一方向性電磁鋼帯の表面
にレーザービーム照射して多数の皮膜除去部を形
成後のエツチングに結合することにより、上述し
た如く諸種の顕著な効果を奏し得たものである。 It is known, for example, from Japanese Patent Publication No. 59-11671 that spray pickling is used in some cases for pickling steel. The present invention combines this spray pickling method with etching after forming a large number of film removal parts by irradiating a laser beam onto the surface of a unidirectional electrical steel strip having an insulating film, thereby achieving various types of pickling as described above. This had a remarkable effect.
本発明の実施例
張力絶縁皮膜（５ｇ／m2）を有する高磁束密度
一方向性電磁鋼帯（板厚0.23mm）を第１図に示し
たラインに通して表面をYAGレーザー照射処理
して地鉄露出部（皮膜除去部）を形成させ、次い
で多数列の硝酸スプレーを有するエツチング装置
で地鉄露出部のエツチングを行ない、引続いて水
洗、乾燥後地鉄露出部を補修するため張力絶縁皮
膜（２ｇ／m2）処理を行なう。
Embodiment of the present invention A high magnetic flux density unidirectional electrical steel strip (plate thickness 0.23 mm) having a tensile insulation film (5 g/m 2 ) was passed through the line shown in Fig. 1, and the surface was treated with YAG laser irradiation. An exposed part of the base metal (film removed part) is formed, and then the exposed part of the base metal is etched using an etching device with multiple rows of nitric acid spray, followed by washing and drying, followed by tensile insulation in order to repair the exposed part of the base metal. A coating (2 g/m 2 ) treatment is carried out.
レーザー照射条件及びエツチング条件は次のと
おり。 The laser irradiation conditions and etching conditions are as follows.
(1) ラインスピード 40ｍ／min一定
(2) レーザー照射条件
(a) 照 射 面 ：片面照射
(b) エネルギー密度：2mj／mm2
(c) レーザー痕跡：・点状痕跡径0.2〜0.3mm
（第３図参照） ・点状痕跡Ｃ方向 0.5mm
中心間距離
・痕跡列Ｌ方向間隔 ５mm
(3) エツチング条件
(a) エツチング方式：スプレー方式
(b) スプレー列数 ：20列
(c) 酸 液 ：硝酸濃度60wt％温度40℃
(d) スプレー処理時間：30sec以上
(e) エツチング深さ ：25μ
上記の初期条件で通板し、処理量増加による第
４図に示す如き硝酸濃度の低下並びにFe濃度の
増加につれて同図に示す様に使用スプレー本数を
14列から20列まで増加して250ton処理した。この
様に処理した電磁鋼板を歪取り焼鈍（800℃×2hr
in N2雰囲気）し、鉄損を測定した結果を第４図
に併記した。鉄損測定は単板磁気測定器による。(1) Line speed constant 40 m/min (2) Laser irradiation conditions (a) Irradiation surface: single-sided irradiation (b) Energy density: 2 mj/mm 2 (c) Laser trace: ・Dot trace diameter 0.2 to 0.3 mm ( (See Figure 3) ・Distance between centers 0.5 mm in direction of dotted marks C ・Interval in direction of mark rows L 5 mm (3) Etching conditions (a) Etching method: Spray method (b) Number of spray rows: 20 rows (c) Acid solution : Nitric acid concentration 60wt% Temperature 40℃ (d) Spray processing time: 30sec or more (e) Etching depth: 25μ The plate was passed under the above initial conditions, and the nitric acid concentration decreased as shown in Figure 4 due to the increase in the throughput, and Fe As the concentration increases, the number of sprays used decreases as shown in the figure.
The number of rows was increased from 14 to 20, processing 250 tons. The electromagnetic steel sheet treated in this way is annealed for strain relief (800℃×2hr
in N2 atmosphere) and the results of measuring the iron loss are also shown in Figure 4. Iron loss measurement is performed using a single-plate magnetic measuring device.
これから判る様に、安定したエツチング深さが
得られ、その結果極めて高位に安定した鉄損値が
得られている。 As can be seen, a stable etching depth was obtained, and as a result, an extremely high and stable iron loss value was obtained.
実施例と同一ラインスピード（一定）で実施例
と同様にレーザー照射処理後、濃度60wt％、温
度40℃硝酸を用いた酸洗タンクに浸漬（60sec一
定）し、以降実施例と同様に処理した。
After laser irradiation treatment in the same manner as in the example at the same line speed (constant) as in the example, it was immersed in a pickling tank using nitric acid at a concentration of 60 wt% and a temperature of 40°C (constant for 60 seconds), and thereafter treated in the same manner as in the example. .
その結果、第５図に示す如く処理量の増加によ
る硝酸濃度及びFe濃度の挙動は実施例と同様な
傾向を示したが、エツチング深さは処理量の増加
と共に浅くなり、特に100tonを越える時点から顕
著になり、それにつれて歪取焼鈍後の鉄損値も次
第に悪くなつていることが判る。 As a result, as shown in Fig. 5, the behavior of the nitric acid concentration and Fe concentration as the processing amount increased showed the same tendency as in the example, but the etching depth became shallower as the processing amount increased, especially when the processing amount exceeded 100 tons. It can be seen that the iron loss value after strain relief annealing gradually becomes worse.
以上の如く本発明によれば、レーザー照射処理
とエツチング処理を一連の工程で行なう歪取焼鈍
を行つても鉄損特性が劣化しない低鉄損一方向性
電磁鋼板の製造法において、特殊なエツチング方
法の採用結合によりラインスピードを一定に保つ
て処理を行なうことが可能となり、高位に安定し
た鉄損特性を有する製品が得られるものである。
As described above, according to the present invention, a special etching method is used in a method for producing a low core loss unidirectional electrical steel sheet in which the core loss characteristics do not deteriorate even when strain relief annealing is performed in which laser irradiation treatment and etching treatment are performed in a series of steps. By combining these methods, it becomes possible to carry out processing while keeping the line speed constant, and a product with highly stable iron loss characteristics can be obtained.
第１図は本発明方法を実施するための工程図、
第２図はエツチング時間と地鉄除去深さの関係を
示した図面、第３図はレーザー照射処理した一方
向性電磁鋼板の金属組織写真、第４図は本発明実
施例及び実施結果を示す図面、第５図は比較例及
び実施結果を示す図面である。
Ｓ……絶縁皮膜を有する一方向性電磁鋼帯、２
……レーザービーム照射装置、３……酸液スプレ
ー装置、８……スプレーノズル。
FIG. 1 is a process diagram for carrying out the method of the present invention,
Fig. 2 is a drawing showing the relationship between etching time and base metal removal depth, Fig. 3 is a photograph of the metallographic structure of a grain-oriented electrical steel sheet treated with laser irradiation, and Fig. 4 shows examples and implementation results of the present invention. The drawings and FIG. 5 are drawings showing comparative examples and implementation results. S...Unidirectional electrical steel strip having an insulating film, 2
... Laser beam irradiation device, 3 ... Acid liquid spray device, 8 ... Spray nozzle.
Claims (1)
数の痕跡を形成する処理と、その後の酸液を循環
使用する通板方向に配列された多数本のスプレー
ノズルによる上記痕跡部の地鉄のエツチング処理
とを行い、上記酸液の循環使用によるエツチング
能の変化を酸液中の鉄分濃度検出により、又は製
品サンプルの溶解深さにより検出する段階を行
い、前記エツチング処理を通板方向のスプレーノ
ズルの使用本数を前記エツチング能の変化に応じ
て増加させることにより、前記痕跡形成処理並び
に前記エツチング処理とその後の絶縁皮膜再塗布
処理の一連の処理を通板速度一定の下で連続的に
行うことを特徴とする、方向性電磁鋼板の処理方
法。1 A process of forming a large number of marks on the surface of a grain-oriented electrical steel strip having an insulating film, followed by a process of removing the bare metal in the above-mentioned marks using a large number of spray nozzles arranged in the threading direction that circulate and use an acid solution. A step of detecting the change in etching ability due to the circulating use of the acid solution by detecting the iron concentration in the acid solution or by the dissolution depth of the product sample is performed, and the etching process is performed by spraying in the direction through which the etching process is performed. By increasing the number of nozzles used in accordance with the change in the etching ability, a series of processes including the trace forming process, the etching process, and the subsequent recoating of the insulating film are performed continuously at a constant sheet passing speed. A method for processing a grain-oriented electrical steel sheet.
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60226953A JPS6286175A (en) | 1985-10-14 | 1985-10-14 | Treatment of grain oriented electrical steel sheet |
| DE3539731A DE3539731C2 (en) | 1984-11-10 | 1985-11-08 | Grain-oriented electrical steel sheet having stable stress-relieving magnetic properties and method and apparatus for making the same |
| SE8505295A SE465129B (en) | 1984-11-10 | 1985-11-08 | CORN-ORIENTED STEEL TUNNER PLATE FOR LOW WATER LOSS ELECTRICITY AFTER RELAXATION GLOVES AND PROCEDURE FOR PREPARATION OF THE PLATE |
| BE0/215845A BE903619A (en) | 1984-11-10 | 1985-11-08 | ORIENTED GRAIN ELECTRIC STEEL SHEETS HAVING STABLE MAGNETIC PROPERTIES, THEIR PRODUCTION METHOD AND APPARATUS FOR OBTAINING SAME |
| GB08527599A GB2168626B (en) | 1984-11-10 | 1985-11-08 | Grain-oriented electrical steel sheet having stable magnetic properties resistant to stress-relief annealing, and method and apparatus for producing the same |
| KR1019850008408A KR910002866B1 (en) | 1984-11-10 | 1985-11-11 | Grain-oriented electrical steel sheet having stable magnetic proporties resistant to stress relief annealing and method and apparatus for producing the same |
| IT67947/85A IT1182667B (en) | 1984-11-10 | 1985-11-11 | ORIENTED GRAIN ELECTRIC STEEL SHEET HAVING STABLE MAGNETIC PROPERTIES RESISTANT TO DISTENSION ANNEALING AND METHOD AND EQUIPMENT FOR ITS MANUFACTURE |
| FR858516665A FR2575588B1 (en) | 1984-11-10 | 1985-11-12 | ORIENTED GRAIN ELECTRIC STEEL SHEET HAVING STABLE MAGNETIC PROPERTIES RESISTANT TO RELAXATION ANNUIT, AS WELL AS METHOD AND APPARATUS FOR PRODUCING SAME |
| US06/796,869 US4750949A (en) | 1984-11-10 | 1985-11-12 | Grain-oriented electrical steel sheet having stable magnetic properties resistant to stress-relief annealing, and method and apparatus for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60226953A JPS6286175A (en) | 1985-10-14 | 1985-10-14 | Treatment of grain oriented electrical steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6286175A JPS6286175A (en) | 1987-04-20 |
| JPS636611B2 true JPS636611B2 (en) | 1988-02-10 |
Family
ID=16853202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60226953A Granted JPS6286175A (en) | 1984-11-10 | 1985-10-14 | Treatment of grain oriented electrical steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6286175A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0555867B1 (en) * | 1992-02-13 | 2000-12-06 | Nippon Steel Corporation | Oriented electrical steel sheet having low core loss and method of manufacturing same |
| EP2107130B1 (en) | 2000-08-08 | 2013-10-09 | Nippon Steel & Sumitomo Metal Corporation | Method to produce grain-oriented electrical steel sheet having high magnetic flux density |
| JP5597990B2 (en) * | 2009-12-28 | 2014-10-01 | 大日本印刷株式会社 | Outline processing method for electrical steel sheet with insulation coating |
| CN113272473B (en) | 2019-01-08 | 2023-07-07 | 日本制铁株式会社 | Grain-oriented electrical steel sheet and method for producing grain-oriented electrical steel sheet |
| JP7188459B2 (en) | 2019-01-16 | 2022-12-13 | 日本製鉄株式会社 | Manufacturing method of grain-oriented electrical steel sheet |
| CN113272456B (en) | 2019-01-16 | 2023-03-14 | 日本制铁株式会社 | Method for producing grain-oriented electromagnetic steel sheet |
| WO2020196657A1 (en) | 2019-03-25 | 2020-10-01 | 日本製鉄株式会社 | Grain-oriented electromagnetic steel sheet coating-film-formation coating agent and production method for grain-oriented electromagnetic steel sheet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5850297A (en) * | 1981-09-22 | 1983-03-24 | 日立建機株式会社 | Shield excavator |
| JPS5911671A (en) * | 1982-07-12 | 1984-01-21 | Toshiba Corp | Semiconductor storage device and its manufacture |
| JPS5928525A (en) * | 1982-07-19 | 1984-02-15 | アレゲニ−・ラドラム・スチ−ル・コ−ポレ−シヨン | Manufacture of cube-on-edge silicon steel |
-
1985
- 1985-10-14 JP JP60226953A patent/JPS6286175A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5850297A (en) * | 1981-09-22 | 1983-03-24 | 日立建機株式会社 | Shield excavator |
| JPS5911671A (en) * | 1982-07-12 | 1984-01-21 | Toshiba Corp | Semiconductor storage device and its manufacture |
| JPS5928525A (en) * | 1982-07-19 | 1984-02-15 | アレゲニ−・ラドラム・スチ−ル・コ−ポレ−シヨン | Manufacture of cube-on-edge silicon steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6286175A (en) | 1987-04-20 |
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