JPH05302126A - Continuous annealing device for grain-oriented silicon steel sheet - Google Patents

Continuous annealing device for grain-oriented silicon steel sheet

Info

Publication number
JPH05302126A
JPH05302126A JP4131635A JP13163592A JPH05302126A JP H05302126 A JPH05302126 A JP H05302126A JP 4131635 A JP4131635 A JP 4131635A JP 13163592 A JP13163592 A JP 13163592A JP H05302126 A JPH05302126 A JP H05302126A
Authority
JP
Japan
Prior art keywords
zone
cooling
constant temperature
grain
continuous annealing
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.)
Granted
Application number
JP4131635A
Other languages
Japanese (ja)
Other versions
JP3309862B2 (en
Inventor
Masataka Yamada
政孝 山田
Tsukasa Tanaka
司 田中
Kimimichi Goto
公道 後藤
Kimio Maeyama
公夫 前山
Yoshiaki Iida
嘉明 飯田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP13163592A priority Critical patent/JP3309862B2/en
Publication of JPH05302126A publication Critical patent/JPH05302126A/en
Application granted granted Critical
Publication of JP3309862B2 publication Critical patent/JP3309862B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Manufacturing Of Steel Electrode Plates (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

PURPOSE:To provide a suitable continuous annealing device by which precipita tion of carbide can be controlled in severer than the ordinary method, in view of the ordinary method by which the precipitation of carbide can not severely be controlled, because the holding at the constant temp. on the mid-way of rapid cooling treatment or super slowly cooling treatment can not be executed after soaking treatment in the annealing before the final cold-rolling, in the manufacturing process of a grain-oriented silicon steel sheet. CONSTITUTION:A cooling zone 8 is bisected and an isothermal zone 10 is provided on the intermediate zone, and by the arrangement of annealing zone 6 - first cooling zone 8A - isothermal zone 10 - second cooling zone 8B - drying zone 14, the continuous annealing is executed. Thus, treatment, in which a treated material is held at the constant temp. for the constant time or is super- slowly cooled or in some case, the temp. is raised, can be executed and the precipitation of carbide can be controlled severer than the ordinary method and the magnetic flux density can be improved.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は方向性けい素鋼板の連続
焼鈍装置に係り、特に従来以上に厳密な炭化物の析出を
制御し得る恒温帯を有する連続焼鈍装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous annealing apparatus for grain-oriented silicon steel sheets, and more particularly to a continuous annealing apparatus having a constant temperature zone capable of controlling carbide precipitation more strictly than ever before.

【0002】[0002]

【従来の技術】方向性けい素鋼板は従来一般に次のよう
な工程によって製造されている。 Si:2.5〜4.5%のほかにS、Se、Al、Sb等のイ
ンヒビターを含有する方向性けい素鋼素材を熱間圧延し
た後の熱延鋼帯を均一化焼鈍に引き続き、1回の冷間圧
延、または中間焼鈍を挾む2回の冷間圧延を施し、次い
で脱炭、焼鈍後、焼鈍分離剤を塗布してから、最終仕上
げ焼鈍を施す一連の工程によって方向性けい素鋼板を製
造するに当り、最終冷間圧延前の使用鈍における均熱処
理後の冷却条件は、炭化物の析出を制御するという役割
を果たしており、磁束密度の向上に大きく関与してい
る。
2. Description of the Related Art Conventionally, grain-oriented silicon steel sheets are generally manufactured by the following steps. Si: In addition to 2.5 to 4.5%, S, Se, Al, Sb and other inhibitors containing directional silicon steel material are hot-rolled. One cold rolling or two cold rolling with intermediate annealing, followed by decarburization, annealing, application of annealing separator, and then final finishing annealing. When manufacturing a raw steel sheet, the cooling conditions after soaking in the use blunt before final cold rolling play a role of controlling the precipitation of carbides, and are greatly involved in improving the magnetic flux density.

【0003】例えば、特公昭56−3892号公報に
は、2回の冷間圧延において、最終冷間圧延前の焼鈍後
の冷却で、600℃から300℃までの間を150℃/
min以上の冷却速度で冷却することにより、冷却後の固
溶Cを増加させる方法が開示されている。すなわち、こ
の方法により鋼中の固溶Cを増加させ、かつ冷間圧延時
のパス間での時効効果を有効に作用させることにより磁
気特性を向上させることができるとしている。
For example, Japanese Patent Publication No. 56-3892 discloses that, in the cold rolling performed twice, the temperature after the annealing before the final cold rolling is 150 ° C / 600 ° C to 300 ° C.
A method of increasing the solid solution C after cooling by cooling at a cooling rate of min or more is disclosed. That is, it is said that the magnetic properties can be improved by increasing the solid solution C in the steel by this method and effectively exerting the aging effect between the passes during cold rolling.

【0004】また、特公平2−41565号公報には、
100オングストロームから500オングストロームま
での微細炭化物を中間焼鈍後の冷却時に多数析出させる
技術が開示されている。この方法は、中間焼鈍後300
℃まで急冷し、300℃から150℃までの温度域を8
〜30秒間で徐冷することにより、100オングストロ
ームから500オングストロームまでのサイズの微細炭
化物を析出させ、これにより再結晶後の(110)強度
を増加し、磁気特性が向上するとしている。
Further, Japanese Patent Publication No. 2-41565 discloses that
A technique is disclosed in which a large number of fine carbides of 100 angstroms to 500 angstroms are precipitated during cooling after the intermediate annealing. This method is 300 after the intermediate annealing.
Rapidly cooled down to ℃ 8 and temperature range from 300 ℃ to 150 ℃ 8
It is said that by slowly cooling for about 30 seconds, fine carbide having a size of 100 angstroms to 500 angstroms is deposited, thereby increasing (110) strength after recrystallization and improving magnetic properties.

【0005】更に急冷到達温度後の炭化物の析出制御処
理として、一定温度に保持するか、もしくは徐冷するこ
とにより、カーバイドの析出量およびサイズを制御する
ことにより磁束密度の一層の向上を図ることができるこ
とが判明した。しかし、徐冷の場合は2℃/sec以下の
冷却速度とする必要がある。これは冷却速度が2℃/se
cを越えるとカーバイドの析出サイズの制御が困難とな
るからである。
Further, as a process for controlling the precipitation of carbides after the temperature reaches the quenching temperature, the magnetic flux density is further improved by controlling the precipitation amount and size of the carbide by maintaining a constant temperature or by gradually cooling. It turns out that you can. However, in the case of slow cooling, it is necessary to set the cooling rate to 2 ° C./sec or less. This has a cooling rate of 2 ℃ / se
When it exceeds c, it becomes difficult to control the precipitation size of carbide.

【0006】上記した如く、従来の方向性けい素鋼板の
製造においては、いずれの場合も、冷却工程を急冷もし
くは徐冷と、温度を変化させて行っているものであっ
て、冷却過程の途中で鋼帯温度を一定に保持するとか、
場合によつては鋼帯温度を若干昇温するという技術がな
く、そのためより厳密な炭化物の析出を制御することが
できなかった。
As described above, in the conventional production of grain-oriented silicon steel sheets, in any case, the cooling process is performed by changing the temperature by rapid cooling or slow cooling, and during the cooling process. To keep the steel strip temperature constant,
In some cases, there is no technique for slightly raising the temperature of the steel strip, so that it was not possible to more strictly control the precipitation of carbides.

【0007】[0007]

【発明が解決しようとする課題】本発明の目的は、方向
性けい素鋼板の連続焼鈍工程において、従来以上に厳密
な炭化物の析出を制御することができる好適な連続焼鈍
装置を提供するにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a suitable continuous annealing apparatus capable of controlling the precipitation of carbides more strictly than ever before in the continuous annealing process of grain-oriented silicon steel sheets. ..

【0008】[0008]

【課題を解決するための手段】本発明の要旨とするとこ
ろは次の如くである。 (1) 加熱帯、冷却帯および乾燥帯を有して成る方向
性けい素鋼板の連続焼鈍装置において、前記冷却帯を第
1冷却帯、第2冷却帯の2個所に分離し、該第1および
第2冷却帯の中間に恒温帯を設けたことを特徴とする方
向性けい素鋼板の連続焼鈍装置。 (2) 前記第1冷却帯と恒温帯の間および前記恒温帯
と第2冷却帯の間にはそれぞれ水の侵入を防止するシー
ルロールが設けられている上記(1)に記載の方向性け
い素鋼板の連続焼鈍装置 (3) 前記第1および第2冷却帯の出側に設けられた
放射温度計と、前記加熱帯、第1冷却帯、恒温帯、第2
冷却帯および乾燥帯内を通過する鋼帯の温度を制御する
制御装置と、前記放射温度計の検出値により前記制御装
置を介して前記第1、第2冷却帯へ供給する水量を調節
する電動バルブと、前記恒温帯を通過する鋼帯の温度を
測定するサーモカップルと、前記サーモカップルの検出
値により前記制御装置を介して出力を調節する恒温帯加
熱用ヒーターと、前記恒温帯の出側に設けられた放射温
度計と、第2冷却帯で最終冷却を終了した鋼帯を乾燥す
る乾燥帯と、を有する上記(1)、(2)のいずれかの
項に記載の方向性けい素鋼板の連続焼鈍装置。
The gist of the present invention is as follows. (1) In a continuous annealing device for a grain-oriented silicon steel sheet having a heating zone, a cooling zone and a drying zone, the cooling zone is separated into two parts, a first cooling zone and a second cooling zone, A continuous annealing device for grain-oriented silicon steel sheets, characterized in that a constant temperature zone is provided in the middle of the second cooling zone. (2) The directional silica according to the above (1), wherein seal rolls for preventing water from entering are provided between the first cooling zone and the constant temperature zone and between the constant temperature zone and the second cooling zone. Continuous annealing apparatus for raw steel sheet (3) Radiation thermometer provided on the outlet side of the first and second cooling zones, and the heating zone, the first cooling zone, the constant temperature zone, the second
A controller for controlling the temperature of the steel strip passing through the cooling zone and the drying zone, and an electric motor for adjusting the amount of water supplied to the first and second cooling zones via the controller according to the detection value of the radiation thermometer. A valve, a thermocouple that measures the temperature of the steel strip that passes through the constant temperature zone, a constant temperature zone heating heater that adjusts the output via the controller according to the detection value of the thermocouple, and the outlet side of the constant temperature zone. The directional silicon according to any one of the above (1) and (2), further comprising: a radiation thermometer provided in the second cooling zone; and a drying zone for drying the steel strip that has been finally cooled in the second cooling zone. Continuous steel sheet annealing equipment.

【0009】本発明による方向性けい素鋼板の連続焼鈍
装置を図1に示された実施例を参照して説明する。図1
は方向性けい素鋼板2がリンガーロール3に案内されて
左方から右方へ連続焼鈍装置4内を通過して連続焼鈍さ
れる際に使用する本発明装置の配列ならびに、これを制
御する制御装置を示す配置系統図である。けい素鋼帯2
を1000℃〜1100℃に均一加熱する焼鈍帯6の加
熱方式は、本実施例では電熱によるものであるが、熱源
は電熱に限ることなく、その他の方式でもよい。要は非
酸化性または弱酸化性雰囲気で均一加熱できればよい。
また本実施例では独立した焼鈍炉6となっているが、使
用ならびに付帯装置等の関係から厚い仕切り壁を有する
加熱帯として構成してもよい。
A continuous annealing apparatus for grain-oriented silicon steel sheets according to the present invention will be described with reference to the embodiment shown in FIG. Figure 1
Is an arrangement of the apparatus of the present invention used when the grain-oriented silicon steel sheet 2 is guided by the ringer roll 3 and is continuously annealed by passing through the continuous annealing apparatus 4 from the left to the right, and the control for controlling this. It is an arrangement system diagram which shows an apparatus. Silicon steel strip 2
The heating method of the annealing zone 6 for uniformly heating the material to 1000 ° C. to 1100 ° C. is electric heating in this embodiment, but the heat source is not limited to electric heating, and other methods may be used. The point is that uniform heating can be performed in a non-oxidizing or weakly oxidizing atmosphere.
In addition, although the annealing furnace 6 is independent in this embodiment, it may be configured as a heating zone having a thick partition wall in consideration of use and auxiliary equipment.

【0010】次に鋼帯2は冷却帯8に入るが、本発明に
よる冷却帯は、これを2個所に分離し第1冷却帯8A、
第2冷却帯8Bとし第1冷却帯8Aと第2冷却帯8Bと
の中間に恒温帯10を設けたことが特徴である。なお、
本発明においては、冷却帯は第1冷却帯8A、第2冷却
帯8Bのいずれも冷却方式は水冷によるもので、通過鋼
帯2に水スプレー5を散布する方式であるので、第1冷
却帯8Aと、恒温帯10との間、恒温帯10との第2冷
却帯との間および第2冷却帯と乾燥帯もしくは乾燥炉1
4との間には、それぞれ、シールロールを設け、恒温帯
10および乾燥帯14への水の侵入を防止している。な
お恒温帯10の熱源は、本実施例では電熱方式である
が、その他の熱源でもよい。従って連続焼鈍される鋼帯
2は、第2冷却帯8Bを出た後シールロールによって水
切りを行われたのち乾燥炉14にて乾燥される。
Next, the steel strip 2 enters the cooling zone 8, and the cooling zone according to the present invention is divided into two parts, the first cooling zone 8A,
The second cooling zone 8B is characterized in that a constant temperature zone 10 is provided between the first cooling zone 8A and the second cooling zone 8B. In addition,
In the present invention, the cooling zone is water cooling as the cooling zone for both the first cooling zone 8A and the second cooling zone 8B, and the water spray 5 is sprayed on the passing steel strip 2. 8A and the constant temperature zone 10, between the second cooling zone and the constant temperature zone 10, and between the second cooling zone and the drying zone or the drying furnace 1.
A seal roll is provided between each of them to prevent water from entering the constant temperature zone 10 and the drying zone 14. The heat source of the constant temperature zone 10 is an electric heating system in this embodiment, but other heat sources may be used. Therefore, the steel strip 2 to be continuously annealed is dried in the drying furnace 14 after being drained by the seal roll after exiting the second cooling zone 8B.

【0011】次に本発明による連続焼鈍装置4の制御装
置18について説明する。第1冷却帯8Aおよび第2冷
却帯8Bの出側には、それぞれ放射温度計20A、20
Bが設けられており、それぞれの検出値により制御装置
18を介して電動バルブ22により水スプレー5の水量
を調節し、鋼帯2に所定の温度を付与することができ
る。また恒温帯10を通過する鋼帯2の温度を測定する
サーモカップル24の検出値により、制御装置18を介
して加熱用ヒーター26の出力を調整し、恒温帯10の
温度を所定の温度に保持させることができ、これにより
鋼帯2の恒温保持のみならず、超徐冷もしくは場合によ
っては昇温も可能である。なお、上記サーモカップル2
4の代りに恒温帯10の出側に放射温度計20Cを設
け、その検出値により制御装置18を介して鋼帯2を所
定温度に制御することも可能である。かくの如く、第2
冷却帯8Bで最終冷却を終了した鋼帯2は、シールロー
ル16Cによって水切りされた後、乾燥炉14にて乾燥
されて次工程へ移行させる。
Next, the control device 18 of the continuous annealing device 4 according to the present invention will be described. Radiation thermometers 20A and 20A are provided on the outlet sides of the first cooling zone 8A and the second cooling zone 8B, respectively.
B is provided, and the amount of water in the water spray 5 can be adjusted by the electric valve 22 via the control device 18 according to the respective detected values, and a predetermined temperature can be given to the steel strip 2. Further, the output of the heater 26 for heating is adjusted via the control device 18 by the detection value of the thermocouple 24 that measures the temperature of the steel strip 2 passing through the constant temperature zone 10 to keep the temperature of the constant temperature zone 10 at a predetermined temperature. Therefore, not only the constant temperature of the steel strip 2 can be maintained, but also super slow cooling or, in some cases, temperature rise can be performed. In addition, the above thermo couple 2
It is also possible to provide a radiation thermometer 20C on the outlet side of the constant temperature zone 10 instead of 4, and to control the steel strip 2 to a predetermined temperature via the control device 18 by the detection value thereof. Like this, second
The steel strip 2 which has been subjected to the final cooling in the cooling zone 8B is drained by the seal roll 16C and then dried in the drying furnace 14 to be transferred to the next step.

【0012】本発明によれば、従来の冷却帯を2分して
第1冷却帯8A、第2冷却帯8Bとし、これらの中間に
恒温帯10を設けたので冷却工程の途中で、処理鋼帯2
の一定温度保持、超徐冷もしくは昇温も可能となったの
で、従来技術よりも格段に安定した厳密な炭化物の析出
制御が可能となつた。例えば、方向性けい素鋼板の製造
工程において、最終冷延前の焼鈍において、均熱処理
後、15〜500℃/secの冷却速度で450〜200
℃の温度まで急冷し、次いで (イ) 急冷到達温度で10〜90秒間保持した後、急冷
する。 (ロ) もしくは、急冷到達温度から2℃/sec以下の冷却
速度で冷却する徐冷処理を、10〜90秒間行う。 上記(イ)、(ロ)いずれかの炭化物析出制御処理を行うこ
とにより著しく磁束密度を向上せしめることができるこ
とが判明している。この場合、急冷到達温度が450℃
を越えると、カーバイドが粒界に粗大析出するので、1
次再結晶集合組織の改善効果がなく、一方、200℃未
満ではCが固溶するか、またはカーバイドとして析出し
てもサイズが小さいため、やはり1次再結晶集合組織の
改善が少ない。また、急冷到達温度までの冷却速度が1
5℃/secに満たないと、恒温でカーバイドの析出が始
るので、やはり1次再結晶集合組織を十分に改善するこ
とができないことが判明している。かくの如き、方向性
けい素鋼板の製造工程における厳密な炭化物制御は、本
発明による連続焼鈍装置において、初めて可能となった
ものであって、従来の焼鈍装置では不可能である。
According to the present invention, the conventional cooling zone is divided into two parts, that is, the first cooling zone 8A and the second cooling zone 8B, and the constant temperature zone 10 is provided in the middle of them, so that the treated steel is processed in the middle of the cooling process. Obi 2
Since it became possible to maintain a constant temperature, ultra-slow cooling, or temperature rise, it was possible to control the precipitation of carbides that was much more stable and stricter than in the prior art. For example, in the manufacturing process of grain-oriented silicon steel sheet, in annealing before final cold rolling, after soaking, 450 to 200 at a cooling rate of 15 to 500 ° C./sec.
It is rapidly cooled to a temperature of ℃, and then (b) the temperature is reached for 10 to 90 seconds, and then rapidly cooled. (B) Alternatively, a slow cooling process of cooling at a cooling rate of 2 ° C./sec or less from the ultimate cooling temperature is performed for 10 to 90 seconds. It has been found that the magnetic flux density can be remarkably improved by performing the carbide precipitation control treatment of any one of the above (a) and (b). In this case, the temperature reached the rapid cooling is 450 ℃
If it exceeds, the carbide will be coarsely precipitated at the grain boundaries.
There is no improvement effect on the secondary recrystallization texture. On the other hand, when the temperature is lower than 200 ° C., C is solid-solved, or even if precipitated as carbide, the size is small, and thus the primary recrystallization texture is not improved much. In addition, the cooling rate up to the quenching temperature is 1
If it is less than 5 ° C./sec, the precipitation of carbide starts at a constant temperature, and it has been proved that the primary recrystallization texture cannot be sufficiently improved. Such strict control of carbides in the production process of grain-oriented silicon steel sheet is possible for the first time in the continuous annealing apparatus according to the present invention, and is not possible in the conventional annealing apparatus.

【0013】[0013]

【実施例】【Example】

C : 0.070% (重量比) Si : 3.25% Mn : 0.077% Al : 0.028% Se : 0.019% の化学成分を有する方向性けい素鋼素材を、熱間圧延し
たのち、均一化焼鈍に引続き、圧下率が80〜95%の
1回の冷間圧延または最終冷延の圧下率が80〜95%
である中間焼鈍を挾む2回の冷間圧延を施し、次いで脱
炭、1次再結晶焼鈍後、焼鈍分離剤を塗布してから最終
仕上焼鈍を施す製造工程における、最終冷延前の焼鈍に
おける1000℃の均熱処理後の冷却工程において、表
1に示す如き第1冷却帯、恒温帯、第2冷却帯を有する
本発明による連続焼鈍装置を用いた冷却過程で300℃
にて約30秒間恒温保持した後、急冷した場合と、従来
の恒温帯を有しない連続焼鈍装置にて、1000℃から
100℃まで45℃/secの冷却速度で冷却した比較材
とについて、磁束密度B8〔T〕を比較する試験を行っ
た。
C: 0.070% (weight ratio) Si: 3.25% Mn: 0.077% Al: 0.028% Se: 0.019% Grain-oriented silicon steel material having a chemical composition is hot-rolled. Then, subsequent to the homogenizing annealing, the reduction rate of one cold rolling or final cold rolling with a reduction rate of 80 to 95% is 80 to 95%.
Before the final cold rolling in the manufacturing process in which the cold rolling is performed twice including the intermediate annealing, which is followed by decarburization, the primary recrystallization annealing, the annealing separator is applied, and then the final finishing annealing is performed. In the cooling step after the soaking at 1000 ° C. in the above, 300 ° C. was used in the cooling process using the continuous annealing apparatus according to the present invention having the first cooling zone, the constant temperature zone, and the second cooling zone as shown in Table 1.
The magnetic flux of the case where it was rapidly cooled after being kept at a constant temperature for about 30 seconds and the comparative material which was cooled at a cooling rate of 45 ° C./sec from 1000 ° C. to 100 ° C. in a conventional continuous annealing device without a constant temperature zone A test comparing the densities B 8 [T] was performed.

【0014】[0014]

【表1】 なお、表1にて示した本発明の連続焼鈍装置は、第1冷
却帯8Aと恒温帯10間および恒温帯10と第2冷却帯
8B間にはいずれも厚さ1mの仕切り壁を有するもので
あり、焼鈍炉6、乾燥炉14は独立して設置された構成
をとっている。上記比較試験における本発明材の焼鈍温
度1000℃からの冷却曲線Aは図2の実戦で示すとお
りであり、比較材の冷却曲線Bは鎖線で示すとおりであ
った。また本発明材および比較材の磁束速度Β8〔T〕
の測定結果は図3に示すとおりである。図3から明らか
なとおり、本発明装置を使用した本発明材は比較材に比
し、磁束密度が著しく向上している。
[Table 1] The continuous annealing device of the present invention shown in Table 1 has a partition wall having a thickness of 1 m between the first cooling zone 8A and the constant temperature zone 10 and between the constant temperature zone 10 and the second cooling zone 8B. The annealing furnace 6 and the drying furnace 14 are independently installed. The cooling curve A from the annealing temperature of 1000 ° C. of the material of the present invention in the above comparative test was as shown in the actual battle of FIG. 2, and the cooling curve B of the comparative material was as shown by the chain line. Also, the magnetic flux velocity β 8 [T] of the present invention material and the comparative material
The measurement result of is as shown in FIG. As is apparent from FIG. 3, the material of the present invention using the device of the present invention has significantly improved magnetic flux density as compared with the comparative material.

【0015】[0015]

【発明の効果】本発明による方向性けい素鋼板の連続焼
鈍装置は冷却帯を2分し、第1冷却帯、第2冷却帯と
し、その中間に恒温帯を設け、制御装置により自動制御
する構成としたので、次の如き効果を挙げることができ
た。すなわち、方向性けい素鋼板の製造過程において、
最終冷延前の焼鈍において、均熱処理後の冷却工程の途
中で、鋼帯温度の一定保持、超徐冷、もしくは昇温等も
可能となったので、従来装置における製造過程よりも厳
密な炭化物の析出制御が可能となり、その結果著しく磁
束密度を向上させることができるようになった。
In the continuous annealing apparatus for grain-oriented silicon steel sheet according to the present invention, the cooling zone is divided into two, which are a first cooling zone and a second cooling zone, and a constant temperature zone is provided between them to automatically control them by a controller. Because of the constitution, the following effects can be obtained. That is, in the manufacturing process of grain-oriented silicon steel sheet,
During annealing before final cold rolling, during the cooling process after soaking, it is possible to keep the steel strip temperature constant, super slow cooling, or raise the temperature. It has become possible to control the precipitation of, and as a result, it has become possible to significantly improve the magnetic flux density.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明による方向性けい素鋼板の連続焼鈍装置
の実施例の配置を示す平面図である。
FIG. 1 is a plan view showing the arrangement of an embodiment of a continuous annealing apparatus for grain-oriented silicon steel sheets according to the present invention.

【図2】本発明装置による最終冷延前の焼鈍における均
熱処理後の冷却工程の冷却曲線Aと、従来の連続焼鈍装
置による焼鈍の冷却工程の冷却曲線Bとを比較する線図
である。
FIG. 2 is a diagram comparing a cooling curve A in a cooling step after soaking in annealing before final cold rolling by the apparatus of the present invention with a cooling curve B in a cooling step in annealing by a conventional continuous annealing apparatus.

【図3】本発明装置による本発明材と、恒温帯を有しな
い従来の連続焼鈍装置による比較材との最終成品におけ
る磁束密度(B8〔T〕)を比較する線図である。
FIG. 3 is a diagram comparing the magnetic flux densities (B 8 [T]) in the final products of the material of the present invention by the apparatus of the present invention and the comparative material by the conventional continuous annealing apparatus having no constant temperature zone.

【符号の説明】[Explanation of symbols]

2 方向性けい素鋼板 4 連続焼鈍装置 5 水スプレー 6 焼鈍炉(加熱帯) 8 冷却帯 8A 第1冷却帯 8B 第2冷却帯 10 恒温帯 14 乾燥炉、(乾燥帯) 18 制御装置 20A、20B、20C 放射温度計 22 電動バルブ 24 サーモカップル 26 加熱用ヒーター 2 Directional Silicon Steel Sheet 4 Continuous Annealing Device 5 Water Spray 6 Annealing Furnace (Heating Zone) 8 Cooling Zone 8A 1st Cooling Zone 8B 2nd Cooling Zone 10 Constant Temperature Zone 14 Drying Furnace, (Dry Zone) 18 Controllers 20A, 20B , 20C radiation thermometer 22 motorized valve 24 thermocouple 26 heating heater

───────────────────────────────────────────────────── フロントページの続き (72)発明者 後藤 公道 兵庫県神戸市中央区脇浜海岸通2番88号 川崎製鉄株式会社阪神製造所内コ゛トウト モミチ (72)発明者 前山 公夫 兵庫県神戸市中央区脇浜海岸通2番88号 川崎製鉄株式会社阪神製造所内マエヤマキ ミオ (72)発明者 飯田 嘉明 岡山県倉敷市水島川崎通一丁目(番地な し) 川崎製鉄株式会社水島製鉄所内イイ タ゛ヨシアキ ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kodo Goto No. 2 88 Wakihama Kaigan-dori, Chuo-ku, Kobe-shi, Hyogo Prefecture Kawasaki Steel Co., Ltd. Kotomomichi, Hanshin Works (72) Inventor Kimio Maeyama Wakihama, Chuo-ku, Kobe-shi, Hyogo Prefecture Kaido Dori No. 2 88 Kawasaki Steel Co., Ltd. Hanshin Works Maeyama Mio (72) Inventor Yoshiaki Iida Mizushima Kawasaki Dori 1-chome (No address) Yoshiaki Iida Kurashiki City, Okayama Kawasaki Steel Co., Ltd.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 加熱帯、冷却帯および乾燥帯を有して成
る方向性けい素鋼板の連続焼鈍装置において、前記冷却
帯を第1冷却帯、第2冷却帯の2個所に分離し、該第1
および第2冷却帯の中間に恒温帯を設けたことを特徴と
する方向性けい素鋼板の連続焼鈍装置。
1. A continuous annealing device for a grain-oriented silicon steel sheet comprising a heating zone, a cooling zone and a drying zone, wherein the cooling zone is separated into two parts, a first cooling zone and a second cooling zone, First
A continuous annealing device for grain-oriented silicon steel sheets, characterized in that a constant temperature zone is provided in the middle of the second cooling zone.
【請求項2】 前記第1冷却帯と恒温帯の間および前記
恒温帯と第2冷却帯の間にはそれぞれ前記恒温帯への水
の侵入を防止するシールロールが設けられている請求項
1に記載の方向性けい素鋼板の連続焼鈍装置
2. A seal roll for preventing water from entering the constant temperature zone is provided between the first cooling zone and the constant temperature zone and between the constant temperature zone and the second cooling zone, respectively. Continuous annealing equipment for grain-oriented silicon steel sheet
【請求項3】 前記第1および第2冷却帯の出側に設け
られた放射温度計と、前記加熱帯、第1冷却帯、恒温
帯、第2冷却帯および乾燥帯内を通過する鋼帯の温度を
制御する制御装置と、前記放射温度計の検出値により前
記制御装置を介して前記第1、第2冷却帯へ供給する水
量を調節する電動バルブと、前記恒温帯を通過する鋼帯
の温度を測定するサーモカップルと、前記サーモカップ
ルの検出値により前記制御装置を介して出力を調節する
恒温帯加熱用ヒーターと、第2冷却帯で最終冷却を終了
した鋼帯を乾燥する乾燥帯と、を有する請求項1、2の
いずれかの項に記載の方向性けい素鋼板の連続焼鈍装
置。
3. A radiation thermometer provided on the outlet side of the first and second cooling zones, and a steel strip passing through the heating zone, the first cooling zone, the constant temperature zone, the second cooling zone and the drying zone. Controller for controlling the temperature of the temperature, an electric valve for adjusting the amount of water supplied to the first and second cooling zones via the controller according to the detection value of the radiation thermometer, and a steel strip passing through the constant temperature zone. Thermocouple for measuring the temperature of, a heater for constant temperature zone heating that adjusts the output through the control device according to the detection value of the thermocouple, and a drying zone for drying the steel strip that has finished the final cooling in the second cooling zone. The continuous annealing apparatus for a grain-oriented silicon steel sheet according to any one of claims 1 and 2.
JP13163592A 1992-04-24 1992-04-24 Continuous annealing equipment for grain-oriented electrical steel strip before final cold rolling Expired - Fee Related JP3309862B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13163592A JP3309862B2 (en) 1992-04-24 1992-04-24 Continuous annealing equipment for grain-oriented electrical steel strip before final cold rolling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13163592A JP3309862B2 (en) 1992-04-24 1992-04-24 Continuous annealing equipment for grain-oriented electrical steel strip before final cold rolling

Publications (2)

Publication Number Publication Date
JPH05302126A true JPH05302126A (en) 1993-11-16
JP3309862B2 JP3309862B2 (en) 2002-07-29

Family

ID=15062665

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP3309862B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100465302C (en) * 2006-08-17 2009-03-04 武汉钢铁(集团)公司 Three-section type atmosphere controlled heat treatment furnace
KR100892409B1 (en) * 2008-03-19 2009-04-10 (주)보성열처리 Annealing apparatus of metal material
KR100905304B1 (en) * 2007-03-08 2009-07-02 (주)태영열처리 Metal isothermal annealing heat treatment method
WO2015099402A1 (en) * 2013-12-25 2015-07-02 주식회사 포스코 Continuous annealing apparatus for strip and continuous annealing method for same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100465302C (en) * 2006-08-17 2009-03-04 武汉钢铁(集团)公司 Three-section type atmosphere controlled heat treatment furnace
KR100905304B1 (en) * 2007-03-08 2009-07-02 (주)태영열처리 Metal isothermal annealing heat treatment method
KR100892409B1 (en) * 2008-03-19 2009-04-10 (주)보성열처리 Annealing apparatus of metal material
WO2015099402A1 (en) * 2013-12-25 2015-07-02 주식회사 포스코 Continuous annealing apparatus for strip and continuous annealing method for same
US10358691B2 (en) 2013-12-25 2019-07-23 Posco Apparatus for continuous annealing of strip and method for continuous annealing of same
US10604820B2 (en) 2013-12-25 2020-03-31 Posco Method of continuously annealing a strip

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