JP3046901B2 - Pretreatment for pickling electrical steel sheets - Google Patents
Pretreatment for pickling electrical steel sheetsInfo
- Publication number
- JP3046901B2 JP3046901B2 JP5280520A JP28052093A JP3046901B2 JP 3046901 B2 JP3046901 B2 JP 3046901B2 JP 5280520 A JP5280520 A JP 5280520A JP 28052093 A JP28052093 A JP 28052093A JP 3046901 B2 JP3046901 B2 JP 3046901B2
- Authority
- JP
- Japan
- Prior art keywords
- pickling
- steel sheet
- scale
- electrical steel
- temperature
- 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 - Lifetime
Links
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- Manufacturing Of Steel Electrode Plates (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電磁鋼板の酸洗い前処
理方法に関し、更に詳細には、熱間圧延し、その後焼鈍
した電磁鋼板の酸洗い時間を短縮できるように、電磁鋼
板を酸洗いする前に処理する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pretreatment method for pickling electrical steel sheets, and more particularly, to a method for pickling electrical steel sheets so as to reduce the time required for pickling hot-rolled and then annealed electrical steel sheets. It relates to a method of treating before washing.
【０００２】[0002]
【従来の技術】熱間圧延し、その後焼鈍した電磁鋼板を
酸洗いするのに、従来は、図４に示すように、電磁鋼板
１を複数の酸洗い槽２内の酸液（通常、９０℃以上の５
〜１０％Ｈｃｌ）３中に順次浸漬させることにより行っ
ている。2. Description of the Related Art Conventionally, in order to pickle a hot-rolled and then annealed electrical steel sheet, as shown in FIG. 5 degrees Celsius or higher
-10% Hcl) 3.
【０００３】[0003]
【発明が解決しようとする課題】このような従来の電磁
鋼板酸洗い方法は、しかし、酸洗い時間が長くかかり、
生産性が悪い問題があった。その理由は、電磁鋼板はＳ
ｉを３.０〜６.５ｗｔ％と多く含有しており、熱延及び
熱延後の焼鈍に伴い、難脱スケールのファイヤライト
（２ＦｅＯ・ＳｉＯ2）を主成分とするスケールが生成
するためである。このため、９０℃以上の高温でかつ５
〜１０％の高濃度のＨｃｌで電磁鋼板を酸洗いしても、
長時間を要している。However, such a conventional method for pickling electromagnetic steel sheets, however, requires a long pickling time,
There was a problem with poor productivity. The reason is that the magnetic steel sheet is S
i is contained in a large amount of 3.0 to 6.5 wt%, and scales mainly containing fire- resistant scale (2FeO.SiO 2 ) are generated with hot rolling and annealing after hot rolling. It is. For this reason, at a high temperature of 90 ° C. or more and 5
Pickling electrical steel sheet with Hcl of high concentration of -10%,
It takes a long time.
【０００４】なお、電磁鋼板の酸洗い時間を短縮するた
めに、酸洗前に他の鋼板に用いられているショットブラ
スト或いはベンディングといった処理をすることが考え
られるが、電磁鋼板はＳｉ量が通常の炭素鋼板（１.０
ｗｔ％以下）或いはステンレス鋼板よりも前述した如く
３.０〜６.５ｗｔ％と大きいため、鋼板自体が非常にも
ろく、これらの方法は用いられないものである。[0004] In order to shorten the pickling time of the magnetic steel sheet, it is conceivable that a treatment such as shot blasting or bending used for other steel sheets is performed before pickling. Carbon steel sheet (1.0
wt% or less) or 3.0 to 6.5 wt%, as described above, than the stainless steel plate, so that the steel plate itself is very fragile and these methods cannot be used.
【０００５】本発明は、以上述べた従来技術の課題を解
決するためになされたもので、電磁鋼板の酸洗い時間を
短縮できるように、電磁鋼板を酸洗いする前に処理する
方法を提供することを目的とする。The present invention has been made to solve the above-mentioned problems of the prior art, and provides a method of treating an electromagnetic steel sheet before pickling so that the pickling time of the electromagnetic steel sheet can be shortened. The purpose is to:
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するた
めに、本発明は、熱間圧延し、その後焼鈍した電磁鋼板
を酸洗いする前に、１５０℃以上の温度で該電磁鋼板に
曲げ歪みを付与するようにしたものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a method of manufacturing a steel sheet which is hot-rolled and then annealed at a temperature of 150 ° C. or more before pickling.
The bending strain is applied.
【０００７】[0007]
【作用】上記の手段によれば、電磁鋼板の酸洗いの前処
理として、１５０℃以上の温度で電磁鋼板、それ故鋼板
表面のスケールに歪みを付与することによって、スケー
ルに多数のクラックを生じさせることができる。したが
って、このクラック付与により、その後の酸洗いにおい
て酸液がこのクラックから侵入し、スケールと鋼板の素
地の境界のスケール又は鋼素地を溶解し、スケールが全
量溶解しないうちにスケールを剥離させることができ
る。すなわち、スケールの表面から溶解し、全部溶解し
ていた従来の方法に比べ、酸洗い時間を短縮させること
ができる。According to the above-mentioned means, as a pretreatment for pickling the magnetic steel sheet, a large number of cracks are generated on the scale by applying strain to the magnetic steel sheet at a temperature of 150 ° C. or more, and hence to the scale of the steel sheet surface. Can be done. Therefore, by this cracking, the acid solution penetrates from this crack in the subsequent pickling, dissolves the scale or the steel base at the boundary between the scale and the base of the steel sheet, and peels off the scale before the entire scale is dissolved. it can. That is, the pickling time can be reduced as compared with the conventional method in which the scale is dissolved from the surface of the scale and completely dissolved.
【０００８】[0008]
【実施例】以下、図面を参照して本発明の実施例につい
て詳細に説明する。図１は、本発明に係る電磁鋼板の酸
洗い前処理方法を実施する装置の一例を示す概略構成図
である。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an example of an apparatus for carrying out a pretreatment method for pickling electromagnetic steel sheets according to the present invention.
【０００９】図１において、１は電磁鋼板、２はこの電
磁鋼板を酸洗いする酸洗い槽であり、その中には図４に
示したように酸液（例えばＨｃｌ）３が入れられてい
る。そして、本発明によれば、熱延・焼鈍後の電磁鋼板
１を酸洗い槽２で酸洗いする前に、電磁鋼板１を１５０
℃以上の温度に加熱する手段、例えば図示するような誘
電加熱装置４と、この１５０℃以上の温度に加熱された
電磁鋼板１に少なくとも１回以上曲げ歪みを付与する手
段、例えば図示するようなスケールブレーカ炉５とが設
けられている。スケールブレーカ炉５は、その中に、一
連のスケールブレーカ（ロール）６と、保温用ヒータ７
と、ピンチロール８とを具備している。In FIG. 1, reference numeral 1 denotes an electromagnetic steel plate, and reference numeral 2 denotes an acid pickling tank for pickling the magnetic steel plate, in which an acid solution (for example, Hcl) 3 is put as shown in FIG. . According to the present invention, before the electromagnetic steel sheet 1 after hot rolling and annealing is pickled in the pickling tank 2,
A means for heating to a temperature of at least 100 ° C., for example, a dielectric heating device 4 as shown, and a means for applying bending strain to the magnetic steel sheet 1 heated to a temperature of at least 150 ° C. at least once, for example, as shown in the figure. A scale breaker furnace 5 is provided. The scale breaker furnace 5 includes a series of scale breakers (rolls) 6 and a heater 7 for keeping heat.
And a pinch roll 8.
【００１０】次に作用について説明する。熱延・焼鈍後
の電磁鋼板１は誘電加熱装置４で１５０℃以上の温度に
加熱される。この１５０℃以上の温度に加熱された電磁
鋼板１は、それから、スケールブレーカ炉５の中に導入
されて、一連のスケールブレーカ６により曲げ・曲戻し
が繰り返し付与され、その後ピンチロール８を通過し
て、酸洗い槽２へ導入される。この場合、スケールブレ
ーカ炉５の中を通過する電磁鋼板１は、一連の保温用ヒ
ータ７によって温度が１５０℃より低下しないようにさ
れている。Next, the operation will be described. The magnetic steel sheet 1 after hot rolling and annealing is heated by the dielectric heating device 4 to a temperature of 150 ° C. or higher. The magnetic steel sheet 1 heated to a temperature of 150 ° C. or more is then introduced into a scale breaker furnace 5 and repeatedly bent and bent by a series of scale breakers 6, and then passes through a pinch roll 8. Then, it is introduced into the pickling tank 2. In this case, the temperature of the magnetic steel sheet 1 passing through the scale breaker furnace 5 is prevented from dropping below 150 ° C. by a series of heaters 7 for keeping heat.
【００１１】以上述べた方法によれば、電磁鋼板１の酸
洗いの前処理として、１５０℃以上の温度で電磁鋼板
１、それ故鋼板表面のスケールに曲げ歪みを付与するこ
とによって、図２に示すように、スケール１２に多数の
クラック１３を生じさせることができる。したがって、
このクラック付与により、その後の酸洗いにおいて酸液
例えばＨｃｌがこのクラック１３から侵入し、スケール
１２と鋼板の素地１１の境界のスケール１２又は鋼素地
１１を溶解し、スケール１２が全量溶解しないうちにス
ケール１２を剥離させることができる。すなわち、スケ
ールの表面から溶解し、全部溶解していた従来の方法に
比べ、酸洗い時間を短縮させることができる。According to the above-described method, as a pretreatment for pickling the magnetic steel sheet 1, bending strain is applied to the magnetic steel sheet 1 at a temperature of 150 ° C. or more, and therefore to the scale of the steel sheet surface. As shown, a large number of cracks 13 can be generated in the scale 12. Therefore,
By this cracking, an acid solution, for example, Hcl invades from the crack 13 in the subsequent pickling, dissolves the scale 12 or the steel base 11 at the boundary between the scale 12 and the base 11 of the steel sheet, and dissolves the entire scale 12 before dissolving. The scale 12 can be peeled off. That is, the pickling time can be reduced as compared with the conventional method in which the scale is dissolved from the surface of the scale and completely dissolved.
【００１２】なお、電磁鋼板に曲げ歪みを付与する際、
１５０℃以上の温度で実施するのは次の理由による。す
なわち、電磁鋼板は前述した如く非常にもろい鋼板であ
り、１５０℃未満ではほとんど曲げられず、無理に曲げ
ると折れてしまう。しかし、１５０℃以上では延性が現
われ、スケールにクラックを付与するのに十分な曲げが
可能となる。図３は、一具体例として、６.５ｗｔ％Ｓ
ｉ含有鋼板の曲げ温度と曲げ歪み量との関係を示すが、
１５０℃以上で十分な曲げ歪みが得られることを示して
いる。When imparting bending strain to an electromagnetic steel sheet,
The operation at a temperature of 150 ° C. or more is performed for the following reason. That is, as described above, the electromagnetic steel sheet is a very fragile steel sheet, is hardly bent at a temperature lower than 150 ° C., and breaks when forcibly bent. However, at a temperature of 150 ° C. or more, ductility appears, and the scale can be sufficiently bent to give cracks. FIG. 3 shows, as a specific example, 6.5 wt% S
The relationship between the bending temperature and the bending strain of the i-containing steel plate is shown.
It shows that sufficient bending strain can be obtained at 150 ° C. or higher.
【００１３】次に本発明の実施例について例示する。Next, examples of the present invention will be described.
【００１４】[0014]
【実施例１】板厚２.３ｍｍの熱延・焼鈍後の３.５ｗｔ
％Ｓｉ含有電磁鋼板を用い、１回の表面歪みが１.０％
になるようロールにそわせて曲げ、これを表側に圧縮歪
みを２回、引張歪みを２回、裏面にも同様に、圧縮歪み
を２回、引張歪みを２回、１５０℃で付与し、その後９
０℃、８％のＨｃｌ中に浸漬し、酸洗いした。そして、
スケールに曲げ歪みを与えない従来法と酸洗い時間を比
較すると、表１のとおりとなり、本発明による方法の効
果が大きいことが確認できた。Embodiment 1 3.5 mm after hot rolling and annealing of a 2.3 mm thick plate
% Surface strain using 1.0% Si-containing electromagnetic steel sheet
Bending it along the roll so as to give a compressive strain twice to the front side, a tensile strain twice, and a compressive strain twice and a tensile strain twice to the back side at 150 ° C. Then 9
It was immersed in 8% Hcl at 0 ° C. and pickled. And
Table 1 shows a comparison of the pickling time with the conventional method that does not give bending distortion to the scale, and it was confirmed that the effect of the method according to the present invention was large.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【実施例２】板厚３.０ｍｍの熱延・焼鈍後の６.５ｗｔ
％Ｓｉ含有電磁鋼板を用い、１回の表面歪みが１.０％
になるようロールにそわせて曲げ、これを表側に圧縮歪
みを２回、引張歪みを２回、裏面にも同様に、圧縮歪み
を２回、引張歪みを２回、２００℃で付与し、その後９
２℃、８％のＨｃｌ中に浸漬し、酸洗いした。そして、
スケールに曲げ歪みを与えない従来法と酸洗い時間を比
較すると、表２のとおりとなり、本発明による方法の効
果が大きいことが確認できた。Embodiment 2 6.5 mm after hot rolling / annealing with a thickness of 3.0 mm
% Surface strain using 1.0% Si-containing electromagnetic steel sheet
Bending it along the roll so as to give a compressive strain twice on the front side, a tensile strain twice, and a compressive strain twice and a tensile strain twice on the back side at 200 ° C. Then 9
It was immersed in 8% Hcl at 2 ° C. and pickled. And
Table 2 shows a comparison between the conventional method in which bending distortion is not applied to the scale and the pickling time, confirming that the effect of the method according to the present invention is large.
【００１７】[0017]
【表２】 [Table 2]
【００１８】[0018]
【実施例３】板厚３.０ｍｍの熱延・焼鈍後の３.５ｗｔ
％Ｓｉ含有電磁鋼板を用い、１回の表面歪みが１.０％
となるようロールにそわせて曲げ、これを表側に圧縮歪
みを２回、引張歪みを２回、裏面にも同様に圧縮歪みを
２回、引張歪みを２回、１５０℃で付与し、その後９０
℃、８％のＨｃｌ中に浸漬し、酸洗いした。そして、上
記の実施例１，２と異なり、比較する従来法として平均
粒径１.０ｍｍφの鋼球を４０Ｋｇ／ｍ2の投射量で室温
にて付与した後、上述と同一条件で酸洗いした。両者の
酸洗い時間の比較した結果は、表３のとおりであり、本
発明による方法は酸洗い時間が短く、従来法より効果が
大きいことがわかった。Example 3 3.5 mm after hot rolling / annealing with a thickness of 3.0 mm
% Surface strain using 1.0% Si-containing electromagnetic steel sheet
The sheet is bent along a roll so as to give a compressive strain twice on the front side, a tensile strain twice, and a compressive strain twice and a tensile strain twice on the back side at 150 ° C. 90
It was immersed in Hcl at 8 ° C. and 8% and pickled. Then, unlike the above Examples 1 and 2, as a conventional method for comparison, a steel ball having an average particle diameter of 1.0 mm φ was applied at room temperature with a projection amount of 40 kg / m 2 , and then pickled under the same conditions as above. did. Table 3 shows the results of comparison between the two pickling times, and it was found that the method according to the present invention has a shorter pickling time and is more effective than the conventional method.
【００１９】[0019]
【表３】 [Table 3]
【００２０】[0020]
【発明の効果】以上述べたように、本発明によれば、熱
間圧延し、その後焼鈍した電磁鋼板を酸洗いする前に、
１５０℃以上の温度で該電磁鋼板に曲げ歪みを付与する
ことによって、鋼板表面のスケールにクラックを生じさ
せるようにしているので、その後に行われる酸洗いで
は、該クラックから酸液が侵入して、スケールが全量溶
解しないうちにスケールを剥離させることができ、した
がって酸洗い時間を短縮させることができる。As described above, according to the present invention, before the hot-rolled and then annealed electrical steel sheet is pickled,
By applying a bending strain to the magnetic steel sheet at a temperature of 150 ° C. or more , cracks are generated on the scale of the steel sheet surface, so that in the subsequent pickling, the acid solution is removed from the cracks. Penetrates and the scale can be peeled off before the entire amount of the scale is dissolved, so that the pickling time can be reduced.
【図１】本発明に係る電磁鋼板の酸洗い前処理方法を実
施する装置の一例を示す概略構成図である。FIG. 1 is a schematic configuration diagram showing an example of an apparatus for carrying out a pretreatment method for pickling electromagnetic steel sheets according to the present invention.
【図２】本発明方法による曲げ歪み付与により、鋼板表
面のスケールにクラックが生じた状態を示す図である。FIG. 2 is a view showing a state in which cracks have occurred on the scale of the steel sheet surface due to the application of bending strain according to the method of the present invention.
【図３】曲げ付与時の鋼板温度と鋼板スケール表面に１
回に付与できる最大曲げ歪み量との関係を示す図であ
る。FIG. 3 shows the steel sheet temperature at the time of bending and the steel sheet scale surface with 1
It is a figure showing relation with the maximum amount of bending strain which can be given to time.
【図４】電磁鋼板を酸洗いする従来の方法を示す図であ
る。FIG. 4 is a view showing a conventional method of pickling an electromagnetic steel sheet.
１ 電磁鋼板 ２ 酸洗い槽 ３ 酸液 ４ 誘電加熱装置 ５ スケールブレーカ炉 ６ スケールブレーカ ７ 保温用ヒータ ８ ピンチロール １１ 鋼素地 １２ スケール １３ クラック DESCRIPTION OF SYMBOLS 1 Magnetic steel sheet 2 Pickling tank 3 Acid solution 4 Dielectric heating device 5 Scale breaker furnace 6 Scale breaker 7 Heating heater 8 Pinch roll 11 Steel base 12 Scale 13 Crack
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 平１−128904（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) C23G 3/02 C21D 8/12 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 1-128904 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) C23G 3/02 C21D 8/12
Claims (1)
酸洗いする前に、１５０℃以上の温度で該電磁鋼板に曲
げ歪みを付与することを特徴とする電磁鋼板の酸洗い前
処理方法。1. Before hot-rolling and then pickling the annealed electrical steel sheet, the electrical steel sheet is bent at a temperature of 150 ° C. or more.
A pickling pretreatment method for electrical steel sheets, characterized by imparting straining strain .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5280520A JP3046901B2 (en) | 1993-10-14 | 1993-10-14 | Pretreatment for pickling electrical steel sheets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5280520A JP3046901B2 (en) | 1993-10-14 | 1993-10-14 | Pretreatment for pickling electrical steel sheets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07113188A JPH07113188A (en) | 1995-05-02 |
| JP3046901B2 true JP3046901B2 (en) | 2000-05-29 |
Family
ID=17626255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5280520A Expired - Lifetime JP3046901B2 (en) | 1993-10-14 | 1993-10-14 | Pretreatment for pickling electrical steel sheets |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3046901B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109277408B (en) * | 2018-09-27 | 2021-04-20 | 浙江华赢特钢科技有限公司 | Silicon steel sheet forming equipment and manufacturing process |
| JP7192378B2 (en) * | 2018-10-11 | 2022-12-20 | 日本製鉄株式会社 | Rolling equipment and steel plate rolling method |
| CN109504979B (en) * | 2018-12-21 | 2020-12-15 | 浙江协和薄钢科技有限公司 | Preposed processing device for pickling steel coil |
-
1993
- 1993-10-14 JP JP5280520A patent/JP3046901B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07113188A (en) | 1995-05-02 |
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