JPH075986B2 - Method for manufacturing non-oriented electrical steel sheet with excellent magnetic flux density in low magnetic field - Google Patents
Method for manufacturing non-oriented electrical steel sheet with excellent magnetic flux density in low magnetic fieldInfo
- Publication number
- JPH075986B2 JPH075986B2 JP63059140A JP5914088A JPH075986B2 JP H075986 B2 JPH075986 B2 JP H075986B2 JP 63059140 A JP63059140 A JP 63059140A JP 5914088 A JP5914088 A JP 5914088A JP H075986 B2 JPH075986 B2 JP H075986B2
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- flux density
- magnetic field
- magnetic flux
- electrical steel
- 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 - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties characterised by the heat treatment
- C21D8/125—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties characterised by the heat treatment with application of tension
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Soft Magnetic Materials (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は低磁場で高い磁束密度が得られる無方向性電磁
鋼板の製造方法、より詳細には、縦型連続焼鈍炉による
焼鈍方法に関する。TECHNICAL FIELD The present invention relates to a method for producing a non-oriented electrical steel sheet capable of obtaining a high magnetic flux density in a low magnetic field, and more particularly to an annealing method using a vertical continuous annealing furnace.
一般に、冷延鋼板を連続焼鈍炉で焼鈍する場合、板形状
は、焼鈍後調圧で矯正されるか、或いは加熱・均熱時に
炉内張力を付加することにより矯正される。しかし、電
磁鋼板は焼鈍時や冷間での歪の導入により磁気特性が劣
化するため、調圧をかけたり過大な炉内張力を付加する
ことができず、このため良好な形状を得ることは難しい
とされている。Generally, when a cold-rolled steel sheet is annealed in a continuous annealing furnace, the plate shape is corrected by pressure regulation after annealing, or by applying in-furnace tension during heating / soaking. However, since the magnetic properties of the electrical steel sheet deteriorate due to the introduction of strain during annealing or cold, it is not possible to apply pressure or apply excessive tension in the furnace, and therefore a good shape cannot be obtained. It is said to be difficult.
特に縦型連続焼鈍炉は、横型焼鈍炉に比べ炉内張力が高
く、また炉内ロールに板が巻付くことによって板に歪が
導入されるため、磁気特性が劣化しやすく、このため高
級な電磁鋼板は製造できないのが実状である。In particular, the vertical continuous annealing furnace has higher in-core tension than the horizontal annealing furnace, and the strain is introduced into the plate by winding the plate around the in-furnace roll. The reality is that electrical steel cannot be manufactured.
本発明はこのような従来の問題に鑑みなされたもので、
縦型連続焼鈍炉による焼鈍において、焼鈍後の冷却速度
をある範囲に限定することにより、形状に優れしかも低
磁場域で高い磁束密度を有する無方向性電磁鋼板が得ら
れることを見い出し、本発明を完成させたものである。The present invention has been made in view of such conventional problems,
In the annealing in the vertical continuous annealing furnace, by limiting the cooling rate after annealing to a certain range, it was found that a non-oriented electrical steel sheet having an excellent shape and having a high magnetic flux density in a low magnetic field region can be obtained, and the present invention Has been completed.
すなわち本発明は、縦型連続焼鈍炉により最終焼鈍を行
うに当たり、炉内通板時における鋼板張力を1.0kg/mm2
以下とするとともに、冷却時の900〜400℃の温度域にお
ける冷却速度を７〜25℃／秒とすることを特徴とする低
磁場での磁束密度の優れた無方向性電磁鋼板の製造方法
である。That is, the present invention, when performing the final annealing in the vertical continuous annealing furnace, the steel plate tension at the time of passing through the furnace is 1.0 kg / mm 2
In the method for producing a non-oriented electrical steel sheet excellent in magnetic flux density in a low magnetic field, the cooling rate in the temperature range of 900 to 400 ° C. during cooling is set to 7 to 25 ° C./sec. is there.
以下、本発明の詳細をその限定理由とともに説明する。Hereinafter, the details of the present invention will be described together with the reasons for limitation.
本発明は縦型連続焼鈍炉における最終焼鈍において、鋼
板の冷却速度を７〜25℃／秒の範囲に限定する。In the final annealing in the vertical continuous annealing furnace, the present invention limits the cooling rate of the steel sheet to the range of 7 to 25 ° C / sec.
第１図は、焼鈍時の冷却速度が鋼板の低磁場での磁束密
度（B3）及び板形状に及ぼす影響を調べたものである。FIG. 1 shows the effects of the cooling rate during annealing on the magnetic flux density (B 3 ) in a low magnetic field of the steel sheet and the sheet shape.
冷却速度を低磁場での磁束密度の面からみると、冷却速
度が小さすぎると板の熱間降伏応力が低下し、ロールに
よる曲げで板に導入される歪量が大きくなり、磁束密度
（例えばB3）が劣化してしまう。冷却速度が７℃／秒以
上ではこのような熱間降伏応力の低下という問題は起こ
らず、ロール曲げを受けても低磁場での磁束密度は劣化
しない。In terms of the magnetic flux density in a low magnetic field in terms of the cooling rate, if the cooling rate is too small, the hot yield stress of the plate decreases, the amount of strain introduced into the plate by bending with a roll increases, and the magnetic flux density (for example, B 3 ) deteriorates. When the cooling rate is 7 ° C./sec or more, such a problem of a decrease in hot yield stress does not occur, and the magnetic flux density in a low magnetic field does not deteriorate even when subjected to roll bending.
また、冷却速度が過度に大きい（略100℃／秒以上）
と、こんどは冷却歪が導入されてしまい、低磁場での磁
束密度が劣化してしまう。Also, the cooling rate is excessively high (approximately 100 ° C / sec or more)
Then, cooling strain is introduced, and the magnetic flux density in a low magnetic field deteriorates.
一方、板形状（反りの発生）の面からは、冷却速度が25
℃／秒以下の範囲では板の反りは発生しないが、25℃／
秒を超えると冷却による板の不均一収縮により反りが発
生する。On the other hand, from the aspect of plate shape (warpage), the cooling rate is 25
Warpage of the plate does not occur in the range of ℃ / sec or less, but 25 ℃ /
If it exceeds a second, warpage occurs due to uneven contraction of the plate due to cooling.
以上の理由から本発明では冷却速度を７〜25℃／秒の範
囲とする。For the above reasons, in the present invention, the cooling rate is set in the range of 7 to 25 ° C / sec.
このように冷却速度を規制する領域は900〜400℃の温度
域とする。炉内における板温は主として設備的な制約か
ら略900℃が上限とされ、また400℃未満の低温域での冷
却速度は低磁場での磁束密度や板反り等にほとんど影響
を与えない。The region that regulates the cooling rate in this way is the temperature region of 900 to 400 ° C. The upper limit of the plate temperature in the furnace is about 900 ℃, mainly due to equipment restrictions, and the cooling rate in the low temperature region of less than 400 ℃ has little effect on the magnetic flux density and plate warpage in a low magnetic field.
また、焼鈍炉内通板時の鋼板張力が、1.0kg/mm2を超え
ると、歪の導入により低磁場での磁束密度が劣化し、こ
のため本発明では張力を1.0kg/mm2以下にして鋼板を通
板させる。Further, when the steel sheet tension during passing through the annealing furnace exceeds 1.0 kg / mm 2 , the magnetic flux density in a low magnetic field deteriorates due to the introduction of strain, and therefore the tension is 1.0 kg / mm 2 or less in the present invention. Pass the steel plate.
なお、本発明が対象とする鋼板は、Si量が4.0wt％以下
程度の鋼板である。The steel sheet targeted by the present invention is a steel sheet having an Si content of about 4.0 wt% or less.
Si:0.8wt％の冷延鋼板（0.5mmt×960mmw）を、縦型連続
焼鈍炉において焼鈍温度800℃、炉内張力0.5kg/mm2の条
件で冷却速度を変えて連続焼鈍し、得られた鋼板の反り
及び低磁場での磁束密度を測定した。その結果を第１表
に示す。Si: 0.8 wt% cold-rolled steel sheet (0.5 mm t × 960 mm w ) was continuously annealed in a vertical continuous annealing furnace under the conditions of an annealing temperature of 800 ° C and an internal tension of 0.5 kg / mm 2 at different cooling rates. The warpage of the obtained steel sheet and the magnetic flux density in a low magnetic field were measured. The results are shown in Table 1.
なお、板の反りの測定は30mm（幅）×300mm（長さ）の
小板により行った。The warp of the plate was measured with a small plate of 30 mm (width) × 300 mm (length).
〔発明の効果〕 以上述べた本発明によれば、焼鈍時における冷却速度と
炉内張力とを適正化することにより、縦型連続焼鈍炉に
おいて形状に優れ、しかも低磁場で高磁束密度が得られ
る無方向性電磁鋼板を製造することができる。 [Advantages of the Invention] According to the present invention described above, by optimizing the cooling rate and the furnace tension during annealing, the vertical continuous annealing furnace has an excellent shape, and a high magnetic flux density can be obtained in a low magnetic field. A non-oriented electrical steel sheet can be manufactured.
第１図は縦型連続焼鈍炉における焼鈍時の冷却速度が低
磁場での磁束密度及び板形状に及ぼす影響を示したもの
である。FIG. 1 shows the influence of the cooling rate during annealing in a vertical continuous annealing furnace on the magnetic flux density and plate shape in a low magnetic field.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 畑 高明 東京都千代田区丸の内１丁目１番２号 日 本鋼管株式会社内 (72)発明者 林 晴夫 東京都千代田区丸の内１丁目１番２号 日 本鋼管株式会社内 (72)発明者 稲垣 淳一 東京都千代田区丸の内１丁目１番２号 日 本鋼管株式会社内 (56)参考文献 特開 昭61−119620（ＪＰ，Ａ) 特開 昭61−87823（ＪＰ，Ａ) 特開 昭52−96919（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takaaki Hata Inventor, Marunouchi 1-2-2, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Haruo Hayashi 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Date Inside the Steel Pipe Co., Ltd. (72) Inventor Junichi Inagaki 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Inside the Nippon Steel Pipe Co., Ltd. (56) Reference JP 61-119620 (JP, A) JP 61- 87823 (JP, A) JP-A-52-96919 (JP, A)
Claims (1)
たり、炉内通板時における鋼板張力を1.0kg/mm2以下と
し、且つ冷却時の900〜400℃の温度域における冷却速度
を７℃／秒〜25℃／秒とすることを特徴とする低磁場で
の磁束密度の優れた無方向性電磁鋼板の製造方法。1. When performing final annealing in a vertical continuous annealing furnace, the steel plate tension is set to 1.0 kg / mm 2 or less when the steel sheet is passed through the furnace, and the cooling rate is set to 7 in a temperature range of 900 to 400 ° C. during cooling. C./sec. To 25.degree. C./sec.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63059140A JPH075986B2 (en) | 1988-03-11 | 1988-03-11 | Method for manufacturing non-oriented electrical steel sheet with excellent magnetic flux density in low magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63059140A JPH075986B2 (en) | 1988-03-11 | 1988-03-11 | Method for manufacturing non-oriented electrical steel sheet with excellent magnetic flux density in low magnetic field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01234524A JPH01234524A (en) | 1989-09-19 |
| JPH075986B2 true JPH075986B2 (en) | 1995-01-25 |
Family
ID=13104717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63059140A Expired - Fee Related JPH075986B2 (en) | 1988-03-11 | 1988-03-11 | Method for manufacturing non-oriented electrical steel sheet with excellent magnetic flux density in low magnetic field |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH075986B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111266416A (en) * | 2020-01-21 | 2020-06-12 | 鞍钢股份有限公司 | Production method for controlling warping of non-oriented silicon steel rough rolling plate blank |
| EP4365316A1 (en) * | 2022-11-04 | 2024-05-08 | ThyssenKrupp Steel Europe AG | Method for producing a non-oriented electrical strip |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102278897B1 (en) * | 2019-12-19 | 2021-07-16 | 주식회사 포스코 | Non-oriented electrical steel sheet and method for manufacturing the same |
| AT524148B1 (en) * | 2020-08-20 | 2022-08-15 | Nntech Gmbh | Process for manufacturing an electrical strip |
| CN112301192B (en) * | 2020-10-13 | 2022-08-09 | 安阳钢铁股份有限公司 | Vertical annealing process of low-carbon-content cold-rolled non-oriented silicon steel galvanizing unit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5296919A (en) * | 1976-02-10 | 1977-08-15 | Kawasaki Steel Co | Annealing of non anisotropic silicon steel sheets |
| JPS6187823A (en) * | 1984-10-04 | 1986-05-06 | Nippon Steel Corp | Manufacture of nonoriented electrical sheet having remarkably low iron loss |
| JPS61119620A (en) * | 1984-11-14 | 1986-06-06 | Kawasaki Steel Corp | Annealing method of silicon steel strip by vertical continuous annealing furnace |
-
1988
- 1988-03-11 JP JP63059140A patent/JPH075986B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111266416A (en) * | 2020-01-21 | 2020-06-12 | 鞍钢股份有限公司 | Production method for controlling warping of non-oriented silicon steel rough rolling plate blank |
| EP4365316A1 (en) * | 2022-11-04 | 2024-05-08 | ThyssenKrupp Steel Europe AG | Method for producing a non-oriented electrical strip |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01234524A (en) | 1989-09-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |