JPH0857520A - Rolling method for hot steel plate - Google Patents
Rolling method for hot steel plateInfo
- Publication number
- JPH0857520A JPH0857520A JP6220823A JP22082394A JPH0857520A JP H0857520 A JPH0857520 A JP H0857520A JP 6220823 A JP6220823 A JP 6220823A JP 22082394 A JP22082394 A JP 22082394A JP H0857520 A JPH0857520 A JP H0857520A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- rolling
- steel plate
- steel sheet
- spray
- 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
Links
Landscapes
- Control Of Metal Rolling (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱鋼板を熱間圧延機で
冷却しながら圧延する熱鋼板の圧延方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for rolling a hot steel sheet while cooling the hot steel sheet with a hot rolling mill.
【０００２】[0002]
【従来の技術】熱鋼板の圧延方法において、強度および
靱性に優れた鋼板の製造方法として制御圧延が広く用い
られるようになってきている。この制御圧延は、圧延中
の圧延温度を精度よく制御し、最終圧延仕上げ温度をＡ
ｒ3 変態点温度直上にすることにより組織を微細化し、
強度および靱性の改善を図ることができる。2. Description of the Related Art In the rolling method for hot steel sheets, controlled rolling has come to be widely used as a method for producing steel sheets having excellent strength and toughness. In this controlled rolling, the rolling temperature during rolling is accurately controlled and the final rolling finishing temperature is set to A
By making the r 3 transformation point temperature directly above, the structure is refined,
It is possible to improve strength and toughness.
【０００３】この制御圧延は、従来、図１０に示すよう
に、成品板厚ｔに対しある厚みの移送厚で一旦圧延を留
め、その後、自然放冷によりその時の温度Ｔ1 から所定
温度Ｔ2 まで冷却した後再び圧延を行い、成品板厚ｔに
なる最終圧延時の最終仕上げ温度がＡｒ3 変態点温度直
上になるようにしていた。冷却に自然放冷を採用する理
由は、例えば冷却速度の速い水冷では不均一冷却となら
ざるを得ず、大幅な歩留低下が発生するためである。Conventionally, in this controlled rolling, as shown in FIG. 10, the rolling is temporarily stopped at a transfer thickness of a certain thickness with respect to the product sheet thickness t, and then naturally cooled to a predetermined temperature T 2 from the temperature T 1 at that time. After cooling to the temperature, rolling was performed again so that the final finishing temperature at the final rolling at which the product sheet thickness was t was just above the Ar 3 transformation point temperature. The reason why natural cooling is adopted for cooling is that, for example, water cooling having a high cooling rate inevitably results in non-uniform cooling, resulting in a large reduction in yield.
【０００４】この制御圧延では、圧延を中断して冷却速
度の遅い自然放冷で冷却するために、圧延能率の低下が
著しい。また、自然放冷中の冷却制御手段がないため、
鋼板表裏面の温度偏差や鋼板フロント／テール部、板幅
エッジ部の温度低下が発生する。In this controlled rolling, since rolling is interrupted and cooling is performed by natural cooling with a slow cooling rate, the rolling efficiency is remarkably reduced. Also, because there is no cooling control means during natural cooling,
Temperature deviations on the front and back surfaces of the steel sheet, and temperature decreases at the steel sheet front / tail and edge portions of the sheet width occur.
【０００５】この制御圧延に代わる方法として、例えば
特開昭５５−１０６６１５号公報には、放冷を水冷に代
えて圧延能率の低下を防止する方法が記載されている
が、鋼板内部の温度制御手段については記載されていな
い。As an alternative method to the controlled rolling, for example, Japanese Patent Application Laid-Open No. 55-106615 discloses a method in which water cooling is used instead of standing cooling to prevent a decrease in rolling efficiency. The means are not described.
【０００６】[0006]
【発明が解決しようとする課題】厚鋼板の冷却において
は、冷却速度が速くなるほど冷却の不均一、特に鋼板フ
ロント／テール部および板幅エッジ部に過冷却部が発生
し易くなる。そこで、このような不均一冷却に対する制
御手段を持たない水冷却は、制御圧延材のように鋼板内
部温度偏差の均一性を要求される鋼種には使用できな
い。しかし、自然放冷でも鋼板フロント／テール部およ
び板幅エッジ部に若干の過冷却部が発生することは避け
られず、この過冷却による歩留低下が発生する。In the cooling of thick steel plates, the higher the cooling rate, the more uneven the cooling, and the more easily the supercooled parts are likely to occur at the steel plate front / tail parts and the plate width edge parts. Therefore, such water cooling that does not have a control means for non-uniform cooling cannot be used for steel grades that require uniform temperature deviation inside the steel sheet, such as controlled rolling materials. However, even with natural cooling, it is inevitable that a slight subcooling portion will occur in the steel plate front / tail portion and the strip width edge portion, and the yield will decrease due to this supercooling.
【０００７】また、自然放冷は冷却速度が遅いため、長
い冷却時間すなわち圧延中断時間が必要となり、圧延能
率の低下が著しい。圧延能率の低下を防止するために
は、自然放冷を水冷等の急冷手段に変更することが望ま
しいが、急冷を採用すると鋼板内不均一冷却を助長する
ことになるので、不均一冷却を防止するための冷却手段
の開発が不可欠である。Since natural cooling has a slow cooling rate, a long cooling time, that is, a rolling interruption time is required, and the rolling efficiency is significantly reduced. In order to prevent the reduction of rolling efficiency, it is desirable to change the natural cooling to a rapid cooling means such as water cooling, but if rapid cooling is adopted, it will promote non-uniform cooling in the steel sheet, so prevent non-uniform cooling. It is indispensable to develop a cooling means to achieve this.
【０００８】図１０に鋼板温度履歴を示した自然放冷に
よる圧延は、表１に示すように、スラブ厚２４０ｍｍ、
成品板厚２０ｍｍの制御圧延材を圧延した例である。こ
の例では温度制御のための圧延中断時間が総圧延時間の
３３％を占めており、圧延能率の低下が著しい。[0008] As shown in Table 1, rolling by natural cooling in which the temperature history of the steel plate is shown in FIG.
This is an example of rolling a controlled rolled material having a product plate thickness of 20 mm. In this example, the rolling interruption time for temperature control accounts for 33% of the total rolling time, and the reduction of rolling efficiency is remarkable.
【０００９】また、図１１および図１２には同じ例の冷
却終了時の板幅エッジ部および鋼板フロント／テール部
の温度パターンを示す。この例では、板幅エッジ部で約
９０ｍｍ、鋼板フロント／テール部で１．５ｍの温度低
下部が発生している。Further, FIGS. 11 and 12 show the temperature patterns of the plate width edge part and the steel plate front / tail part at the end of cooling in the same example. In this example, there is a temperature drop of about 90 mm at the edge of the plate width and 1.5 m at the front / tail of the steel plate.
【００１０】[0010]
【表１】 [Table 1]
【００１１】また、冷却のみを自然放冷から水冷却に変
更した例の圧延スケジュールを表２に、鋼板温度履歴を
図１３に、冷却終了時の板幅エッジ部および鋼板フロン
ト／テール部の温度パターンを図１４、図１５に示す。Table 2 shows the rolling schedule of an example in which only natural cooling is changed from natural cooling to water cooling, the steel sheet temperature history is shown in FIG. 13, and the temperatures of the strip width edge portion and the steel sheet front / tail portion at the end of cooling are shown. The patterns are shown in FIGS. 14 and 15.
【００１２】[0012]
【表２】 [Table 2]
【００１３】これらからわかるように、自然放冷を水冷
に変更することで圧延能率は約３３％向上するが、板幅
エッジ部および鋼板フロント／テール部の温度降下量お
よび温度降下域の増加が著しく、歩留が約５％悪化す
る。As can be seen from the above, the rolling efficiency is improved by about 33% by changing the natural cooling to the water cooling, but the temperature drop amount and the temperature drop region of the strip width edge portion and the steel sheet front / tail portion are increased. Remarkably, the yield deteriorates by about 5%.
【００１４】そこで本発明は、厚鋼板の強度および靱性
向上のために所定の温度域で所定の圧下量が必要な制御
圧延方法において、熱間圧延機で圧延中の熱鋼板を制御
冷却することにより鋼板内部の所定温度偏差を確保し、
且つ、圧延能率の大幅な向上を図ることを目的とする。Therefore, in the present invention, in a controlled rolling method that requires a predetermined reduction amount in a predetermined temperature range to improve the strength and toughness of a thick steel plate, the hot rolling steel plate is controlled and cooled by a hot rolling mill. Ensures a certain temperature deviation inside the steel plate,
At the same time, the purpose is to significantly improve rolling efficiency.
【００１５】[0015]
【課題を解決するための手段】本発明の熱鋼板の圧延方
法は、熱鋼板表裏面の熱鋼板進行方向に一つ以上の冷却
ヘッダーを有し、熱鋼板幅方向に複数のスプレーノズル
を有し、冷却ヘッダー単位の冷却水制御手段およびスプ
レーノズル単位のオンオフ制御手段を有する冷却装置を
圧延機の直前および／または直後に配置し、熱鋼板を冷
却しながら複数パス圧延する際、特定の圧延パスにおけ
る冷却スプレー幅を圧延中の鋼板幅以下に設定し、且
つ、鋼板フロント／テール部の特定範囲のスプレーを遮
断することを特徴とする熱鋼板の圧延方法である。その
際、圧延パス毎に冷却スプレー幅および鋼板フロント／
テール部のスプレー遮断長の設定を変更することが望ま
しい。A method of rolling a hot steel sheet according to the present invention has one or more cooling headers on the front and back surfaces of the hot steel sheet in the traveling direction of the hot steel sheet and a plurality of spray nozzles in the width direction of the hot steel sheet. However, a cooling device having cooling water control means for each cooling header and ON / OFF control means for each spray nozzle is arranged immediately before and / or immediately after the rolling mill, and when a hot steel sheet is rolled in multiple passes while cooling, a specific rolling operation is performed. A method for rolling a hot steel sheet, characterized in that a cooling spray width in a pass is set to be equal to or less than a steel sheet width during rolling, and a spray in a specific range of a steel sheet front / tail portion is cut off. At that time, cooling spray width and steel plate front /
It is desirable to change the setting of the spray cutoff length of the tail part.
【００１６】[0016]
【作用】本発明により、冷却による圧延能率の低下が発
生せず、且つ、鋼板表裏全面にわたって均一な冷却が達
成できる。エッジマスキング制御は、所定の冷却スプレ
ー幅になるように冷却しない外側のスプレーノズルをオ
フにし、冷却する内側のスプレーノズルをオンにするこ
とで冷却スプレー幅を鋼板幅より狭くし、板幅エッジ部
の過冷却を防止する。この時の冷却スプレー幅と鋼板幅
との差をエッジマスキング量とする。また、フロント／
テールマスキング制御は、スプレーノズルを所定のタイ
ミングで一斉に噴射および停止することで行う。According to the present invention, a reduction in rolling efficiency due to cooling does not occur, and uniform cooling can be achieved over the entire front and back surfaces of the steel sheet. Edge masking control turns off the outer spray nozzle that does not cool to a specified cooling spray width and turns on the inner spray nozzle that cools to make the cooling spray width narrower than the steel plate width, Prevent overcooling. The difference between the cooling spray width and the steel plate width at this time is the edge masking amount. Also, the front /
The tail masking control is performed by simultaneously spraying and stopping the spray nozzles at a predetermined timing.
【００１７】[0017]
【実施例】スラブ厚２４０ｍｍ、成品厚２０ｍｍの実施
例を示す。EXAMPLE An example in which the slab thickness is 240 mm and the product thickness is 20 mm is shown.
【００１８】制御圧延を行うため、成品厚の約２倍の板
厚で温度待ちを行った。温度待ち後、圧延を再開すると
きの鋼板温度は８５０℃以下とした。In order to carry out controlled rolling, the temperature was waited at a plate thickness of about twice the product thickness. After waiting for the temperature, the steel plate temperature at the time of restarting rolling was set to 850 ° C or lower.
【００１９】図１に圧延装置を示す。冷却装置２を圧延
機１の直前、直後にそれぞれ上下一対配置した。図２に
示すように、冷却装置の冷却ヘッダー４には、外部の冷
却制御装置６で１個１個単独にオンオフできるスプレー
ノズル５を配置した。FIG. 1 shows a rolling apparatus. A pair of upper and lower cooling devices 2 were arranged immediately before and after the rolling mill 1, respectively. As shown in FIG. 2, the cooling header 4 of the cooling device is provided with spray nozzles 5 that can be turned on / off individually by an external cooling control device 6.
【００２０】この冷却装置を用いて、鋼板四周部の過冷
却防止のため、板幅エッジ部の過冷却を防止するエッジ
マスキング制御、および鋼板フロント／テール部の過冷
却を防止するフロント／テールマスキング制御を行っ
た。エッジマスキング制御は、複数のスプレーノズルの
オンオフを制御して鋼板幅と冷却スプレー幅との差で制
御を行った。また、フロント／テールマスキング制御
は、図３に示すように、鋼板先行端圧延時に圧延機ロー
ドセルに発生するオンオフ信号をもとに、所定の制御長
になった時点で、スプレーノズルを一斉にオフ状態から
オン状態に、または、オン状態からオフ状態に移行する
ことで制御を行った。By using this cooling device, edge masking control for preventing overcooling of the plate width edge portion, and front / tail masking for preventing overcooling of the steel sheet front / tail portion in order to prevent overcooling of the steel sheet four circumferences. Control was performed. The edge masking control was performed by controlling the on / off of a plurality of spray nozzles and by controlling the difference between the steel plate width and the cooling spray width. Further, as shown in FIG. 3, the front / tail masking control turns off the spray nozzles all at once when a predetermined control length is reached based on an on / off signal generated in the rolling mill load cell during the leading edge rolling of the steel sheet. Control was performed by shifting from the state to the on state or from the on state to the off state.
【００２１】この時の圧延スケジュールを表３に示す。
エッジマスキング制御は圧延第７〜１２パスで、フロン
ト／テールマスキング制御は圧延パス第９〜１２パスで
実施した。Table 3 shows the rolling schedule at this time.
The edge masking control was performed in the 7th to 12th rolling passes, and the front / tail masking control was performed in the 9th to 12th rolling passes.
【００２２】[0022]
【表３】 [Table 3]
【００２３】その結果、圧延後の鋼板四周部の温度分布
は格段に改善された。図４に板幅エッジ部の温度分布
を、図５に鋼板フロント／テール部の温度分布を示す。
これから判るように、従来の自然放冷による圧延に比
べ、板幅エッジ部で約３０℃、鋼板フロント／テール部
で約７０℃温度分布を改善できた。材質改善結果は、図
６〜９に示す。温度分布と同様に、従来の自然放冷によ
る圧延に比べ、ＹＰおよびＴＳも大幅に改善できた。こ
れにより、圧延能率で３３％、歩留で５％向上できた。As a result, the temperature distribution in the four peripheral portions of the steel sheet after rolling was remarkably improved. FIG. 4 shows the temperature distribution at the edge portion of the plate width, and FIG. 5 shows the temperature distribution at the steel plate front / tail portion.
As can be seen, the temperature distribution was improved by about 30 ° C. at the edge portion of the plate width and about 70 ° C. at the front / tail portion of the steel plate as compared with the conventional rolling by natural cooling. The material improvement results are shown in FIGS. Similar to the temperature distribution, YP and TS could be significantly improved as compared with the conventional rolling by natural cooling. As a result, the rolling efficiency was improved by 33% and the yield was improved by 5%.
【００２４】[0024]
【発明の効果】本発明によれば、所定の温度域で所定の
圧下量が必要な制御圧延において、冷却による圧延能率
の低下を回避でき、且つ、鋼板表裏全面にわたって均一
な冷却が達成できる。According to the present invention, in the controlled rolling in which a predetermined rolling amount is required in a predetermined temperature range, it is possible to avoid a reduction in rolling efficiency due to cooling and to achieve uniform cooling over the entire front and back surfaces of the steel sheet.
【図１】本発明を実施するために使用する圧延装置の例
を示す図である。FIG. 1 is a diagram showing an example of a rolling apparatus used to carry out the present invention.
【図２】本発明を実施するために使用する冷却装置の例
を示す図である。FIG. 2 is a diagram showing an example of a cooling device used to carry out the present invention.
【図３】本発明法における冷却水の噴射パターンを示す
図である。FIG. 3 is a diagram showing an injection pattern of cooling water in the method of the present invention.
【図４】本発明法によりエッジマスキング制御しながら
圧延した鋼板の板幅エッジ部の温度分布を示す図であ
る。FIG. 4 is a diagram showing a temperature distribution of a strip width edge portion of a steel sheet rolled under edge masking control according to the method of the present invention.
【図５】本発明法によりフロント／テールマスキング制
御しながら圧延した鋼板の鋼板フロント／テール部の温
度分布を示す図である。FIG. 5 is a diagram showing a temperature distribution of a steel sheet front / tail portion of a steel sheet rolled under front / tail masking control according to the method of the present invention.
【図６】本発明法によりエッジマスキング制御しながら
圧延した鋼板の板幅エッジ部における材質ＹＰの分布を
示す図である。FIG. 6 is a diagram showing a distribution of a material YP at a strip width edge portion of a steel sheet rolled under edge masking control by the method of the present invention.
【図７】本発明法によりエッジマスキング制御しながら
圧延した鋼板の板幅エッジ部における材質ＴＳの分布を
示す図である。FIG. 7 is a diagram showing a distribution of a material TS at a strip width edge portion of a steel sheet rolled while edge masking is controlled by the method of the present invention.
【図８】本発明法によりフロント／テールマスキング制
御しながら圧延した鋼板の鋼板フロント／テール部にお
ける材質ＹＰの分布を示す図である。FIG. 8 is a diagram showing a distribution of material YP in a steel plate front / tail portion of a steel plate rolled under front / tail masking control according to the method of the present invention.
【図９】本発明法によりフロント／テールマスキング制
御しながら圧延した鋼板の鋼板フロント／テール部にお
ける材質ＴＳの分布を示す図である。FIG. 9 is a diagram showing a distribution of a material TS in a steel plate front / tail portion of a steel plate rolled under front / tail masking control according to the method of the present invention.
【図１０】従来の自然放冷による制御圧延における鋼板
温度履歴を示す図である。FIG. 10 is a view showing a steel plate temperature history in conventional controlled rolling by natural cooling.
【図１１】従来の自然放冷による制御圧延で圧延した鋼
板の板幅エッジ部の温度分布を示す図である。FIG. 11 is a diagram showing a temperature distribution at a strip width edge portion of a steel sheet rolled by conventional controlled rolling by natural cooling.
【図１２】従来の自然放冷による制御圧延で圧延した鋼
板の鋼板フロント／テール部の温度分布を示す図であ
る。FIG. 12 is a diagram showing a temperature distribution of a steel sheet front / tail portion of a steel sheet rolled by conventional controlled rolling by natural cooling.
【図１３】従来の水冷による制御圧延における鋼板温度
履歴を示す図である。FIG. 13 is a diagram showing a steel plate temperature history in conventional controlled rolling by water cooling.
【図１４】従来の水冷による制御圧延で圧延した鋼板の
板幅エッジ部の温度分布を示す図である。FIG. 14 is a diagram showing a temperature distribution of a strip width edge portion of a steel sheet rolled by conventional water-cooled controlled rolling.
【図１５】従来の水冷による制御圧延で圧延した鋼板の
鋼板フロント／テール部の温度分布を示す図である。FIG. 15 is a view showing a temperature distribution of a steel plate front / tail portion of a steel plate rolled by conventional water-cooled controlled rolling.
１ 圧延機 ２ 冷却装置 ３ 熱鋼板 ４ 冷却ヘッダー ５ スプレーノズル ６ 冷却制御装置 1 Rolling mill 2 Cooling device 3 Hot steel plate 4 Cooling header 5 Spray nozzle 6 Cooling control device
Claims (2)
上の冷却ヘッダーを有し、熱鋼板幅方向に複数のスプレ
ーノズルを有し、冷却ヘッダー単位の冷却水制御手段お
よびスプレーノズル単位のオンオフ制御手段を有する冷
却装置を圧延機の直前および／または直後に配置し、熱
鋼板を冷却しながら複数パス圧延する際、特定の圧延パ
スにおける冷却スプレー幅を圧延中の鋼板幅以下に設定
し、且つ、鋼板フロント／テール部の特定範囲のスプレ
ーを遮断することを特徴とする熱鋼板の圧延方法。1. A cooling water control means and a spray nozzle unit for each cooling header, having one or more cooling headers on the front and back surfaces of the hot steel sheet in a traveling direction of the hot steel sheet, and having a plurality of spray nozzles in a width direction of the hot steel sheet. A cooling device having an ON / OFF control means is placed immediately before and / or immediately after the rolling mill to set the cooling spray width in a specific rolling pass to be equal to or less than the width of the steel plate during rolling when rolling the hot steel plate in multiple passes while cooling. In addition, a method for rolling a hot steel sheet, characterized in that the spraying of a specific range of the steel sheet front / tail portion is blocked.
いて、圧延パス毎に冷却スプレー幅および鋼板フロント
／テール部のスプレー遮断長の設定を変更することを特
徴とする熱鋼板の圧延方法。2. The method of rolling a hot steel sheet according to claim 1, wherein the settings of the cooling spray width and the spray cutoff length of the front / tail portions of the steel sheet are changed for each rolling pass. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22082394A JP3297216B2 (en) | 1994-08-24 | 1994-08-24 | Hot steel sheet rolling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22082394A JP3297216B2 (en) | 1994-08-24 | 1994-08-24 | Hot steel sheet rolling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0857520A true JPH0857520A (en) | 1996-03-05 |
| JP3297216B2 JP3297216B2 (en) | 2002-07-02 |
Family
ID=16757116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22082394A Expired - Fee Related JP3297216B2 (en) | 1994-08-24 | 1994-08-24 | Hot steel sheet rolling method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3297216B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104138911A (en) * | 2014-05-27 | 2014-11-12 | 南京钢铁股份有限公司 | Method for rapid water-cooling temperature control on intermediate blank of medium thick plate |
| JP2018069317A (en) * | 2016-11-02 | 2018-05-10 | Ｊｆｅスチール株式会社 | Method for manufacturing steel plate and method for setting pass schedule of rolling |
-
1994
- 1994-08-24 JP JP22082394A patent/JP3297216B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104138911A (en) * | 2014-05-27 | 2014-11-12 | 南京钢铁股份有限公司 | Method for rapid water-cooling temperature control on intermediate blank of medium thick plate |
| CN104138911B (en) * | 2014-05-27 | 2016-06-29 | 南京钢铁股份有限公司 | A kind of method of cut deal intermediate blank rapid water cooling temperature control |
| JP2018069317A (en) * | 2016-11-02 | 2018-05-10 | Ｊｆｅスチール株式会社 | Method for manufacturing steel plate and method for setting pass schedule of rolling |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3297216B2 (en) | 2002-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2497612C2 (en) | Method of rolling and rolling unit | |
| KR100986092B1 (en) | Method and device for producing a metal strip by continuous casting and rolling | |
| KR960008867B1 (en) | Method and apparatus for intermediate thickness slab caster and inline hot strip and plate line | |
| US6062055A (en) | Rolling method for thin flat products and relative rolling line | |
| US11000888B2 (en) | Method for producing a metal strip in a cast-rolling installation | |
| US20120160377A1 (en) | Method and device for producing a microalloyed steel, in particular a pipe steel | |
| JP2013528500A (en) | Rolling line and method related thereto | |
| TW201711766A (en) | Installation based on the CSP concept and method for operating such an installation | |
| WO2024120207A1 (en) | Endless continuous casting and rolling production unit and production method for hot-rolled ultra-thin strip steel | |
| US6978531B1 (en) | Method of manufacturing hot rolled steel sheet using mini mill process | |
| JPH0857520A (en) | Rolling method for hot steel plate | |
| EP3606681B1 (en) | Plant and process for multi-mode manufacturing of metal strips and plates | |
| EP3409389B1 (en) | Production equipment line for hot-rolled steel strip and production method for hot-rolled steel strip | |
| JP2002172401A (en) | Equipment and method for continuously casting hot rolling | |
| JP6439938B2 (en) | Heating method after cutting continuous cast slab | |
| US6451136B1 (en) | Method for producing hot-rolled strips and plates | |
| JPS6293010A (en) | Production of hot rolled steel plate | |
| EP3409390B1 (en) | Production equipment line for hot-rolled steel strip and production method for hot-rolled steel strip | |
| JPS58116905A (en) | Producing device for steel material by direct rolling | |
| CN102764870A (en) | Quality improvement method for low alloy steel continuous casting billet | |
| CN115889454B (en) | Pure nickel hot rolled coil and preparation method thereof | |
| KR950001934B1 (en) | Method of manufacturing hot rolling plate | |
| JPH03281011A (en) | Cooling method for thick steel plate | |
| JP3669233B2 (en) | Manufacturing method of ultra-thick H-section steel with excellent strength and toughness | |
| JPH07148502A (en) | Method for slabbing slab of different width |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20020326 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080412 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090412 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090412 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100412 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110412 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120412 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130412 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130412 Year of fee payment: 11 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130412 Year of fee payment: 11 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130412 Year of fee payment: 11 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130412 Year of fee payment: 11 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140412 Year of fee payment: 12 |
|
| LAPS | Cancellation because of no payment of annual fees |