JP2008212966A - Hot rolling equipment and hot-rolling method using the same - Google Patents
Hot rolling equipment and hot-rolling method using the same Download PDFInfo
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- 238000005098 hot rolling Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims description 12
- 238000001816 cooling Methods 0.000 claims abstract description 80
- 238000005096 rolling process Methods 0.000 claims abstract description 54
- 230000002441 reversible effect Effects 0.000 claims abstract description 37
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 47
- 230000003247 decreasing effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 28
- 239000002352 surface water Substances 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
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本発明は、熱間圧延設備およびそれを用いた熱間圧延方法に関するものである。 The present invention relates to a hot rolling facility and a hot rolling method using the same.
例えば、厚板圧延においては、圧延途中で制御圧延（Controlled Rolling；ＣＲ）を施すことにより、優れた材質の鋼材を造り込んでいる。 For example, in thick plate rolling, an excellent steel material is built by performing controlled rolling (CR) during rolling.
その際に、制御圧延を行う時の温度（制御圧延開始温度）が低くかつ制御圧延を行う時の板厚（制御圧延開始板厚）が厚い場合には、圧延材が制御圧延開始温度になるまでにかなりの時間を要するため、熱間圧延（可逆式熱間圧延機）近傍の搬送テーブル上で制御圧延開始温度になるまで圧延材を待機させていた。その結果、その冷却待ちによって熱間圧延機に空き時間が発生し、圧延能率が阻害されるという問題が生じていた。 At that time, when the temperature at the time of controlled rolling (controlled rolling start temperature) is low and the plate thickness at the time of controlled rolling (controlled rolling start plate thickness) is thick, the rolled material becomes the controlled rolling start temperature. Since a considerable amount of time is required, the rolled material is kept on standby until the controlled rolling start temperature is reached on the conveyance table in the vicinity of hot rolling (reversible hot rolling mill). As a result, there is a problem that idle time is generated in the hot rolling mill due to the waiting for cooling, and the rolling efficiency is hindered.
このような冷却待ちによって熱間圧延機に空き時間が発生し圧延能率が阻害されるのを回避するために、例えば、特許文献１には、熱間圧延ラインの仕上圧延機入側において、搬送テーブル上の高温の圧延材を次の圧延材が通過できる高さに持ち上げて待機状態に保持する片持ちフォーク状のアームを有する昇降装置を備えた圧延材の待機装置が開示されている。
しかし、前記特許文献１には、待機装置を用いて追い越し圧延を行うことができることが示唆されているが、冷却待ちを要する制御圧延材が含まれている場合に、どのように圧延を行えば、熱間圧延機の空き時間を低減して、圧延能率を向上させることができるかについては示されていない。 However, although it has been suggested in Patent Document 1 that overtaking rolling can be performed using a standby device, if a controlled rolling material that requires waiting for cooling is included, how to perform rolling? It is not shown whether the rolling mill efficiency can be improved by reducing the idle time of the hot rolling mill.
本発明は、上記のような事情に鑑みてなされたものであり、冷却待ちを要する制御圧延材が含まれている場合でも、熱間圧延機の空き時間を低減して、圧延能率を向上させることができる熱間圧延設備とそれを用いた熱間圧延方法を提供することを目的とするものである。 The present invention has been made in view of the circumstances as described above, and reduces the idle time of a hot rolling mill and improves the rolling efficiency even when a control rolled material requiring waiting for cooling is included. An object of the present invention is to provide a hot rolling facility capable of performing the same and a hot rolling method using the same.
上記の課題を解決するために、本発明は以下の特徴を有する。 In order to solve the above problems, the present invention has the following features.
［１］可逆式熱間圧延機の上流側に、圧延材を冷却するための第１の冷却装置と、圧延材を搬送テーブル上から後続の圧延材が通過できる場所に待機させるための待機装置を備え、可逆式熱間圧延機の下流側に、圧延材を冷却するための第２の冷却装置を備えたことを特徴とする熱間圧延設備。 [1] On the upstream side of the reversible hot rolling mill, a first cooling device for cooling the rolled material, and a standby device for waiting the rolled material on a place where the subsequent rolled material can pass from the transfer table. And a second cooling device for cooling the rolled material on the downstream side of the reversible hot rolling mill.
［２］前記第１の冷却装置と前記待機装置と前記第２の冷却装置には、それぞれ圧延材の温度を測定する温度計が設けられていることを特徴とする前記［１］に記載の熱間圧延設備。 [2] The first cooling device, the standby device, and the second cooling device are each provided with a thermometer for measuring a temperature of the rolled material. Hot rolling equipment.
［３］前記［１］または［２］に記載の熱間圧延設備を用いた熱間圧延方法であって、
第１のスラブを前記可逆式熱間圧延機にて所定板厚まで圧延後、第１のスラブを前記待機装置によって搬送テーブル上から後続の圧延材が通過できる場所に待機させ、第２のスラブを前記可逆式熱間圧延機に送って圧延を行うとともに、待機装置で待機させた第１のスラブを搬送テーブル上に戻し、前記第１の冷却装置に送って所定の温度まで冷却し、その後、第２のスラブが可逆式熱間圧延機で所定板厚まで圧延されて下流側に搬送されるのに合わせて、第１のスラブを前記第２の冷却装置に送り、第２の冷却装置で第１のスラブを制御圧延可能な温度まで冷却する一方で、第３のスラブを前記可逆式熱間圧延機に送って所定板厚まで圧延した後、第３のスラブを上流側に搬送するとともに、第２の冷却装置で制御圧延可能な温度まで冷却された第１のスラブを前記可逆式熱間圧延機に送って仕上板厚まで圧延することを特徴とする熱間圧延方法。
[3] A hot rolling method using the hot rolling equipment according to [1] or [2],
After rolling the first slab to a predetermined plate thickness with the reversible hot rolling mill, the first slab is made to stand by at the place where the subsequent rolling material can pass from the transfer table by the standby device, and the second slab Is sent to the reversible hot rolling mill and rolled, and the first slab, which has been kept on standby by the standby device, is returned to the transport table, sent to the first cooling device, and cooled to a predetermined temperature, and thereafter As the second slab is rolled to a predetermined thickness by a reversible hot rolling mill and conveyed downstream, the first slab is sent to the second cooling device, and the second cooling device While the first slab is cooled to a temperature at which control rolling is possible, the third slab is fed to the reversible hot rolling mill and rolled to a predetermined plate thickness, and then the third slab is conveyed upstream. At the same time, it is cooled to a temperature that can be controlled by the second cooling device. Hot rolling method characterized in that the first slab is rolled to a thickness finish sending the reversible hot rolling mill that.
本発明においては、冷却待ちを要する制御圧延材が含まれている場合に、第１、第２の冷却装置による冷却と、待機装置を用いた追い越し圧延を適切に組み合わせることができるようにしているので、熱間圧延機の空き時間を低減して、圧延される圧延材本数を増加させることができ、圧延能率を向上させることができる。 In the present invention, when a control rolled material that needs to be cooled is included, the cooling by the first and second cooling devices and the overtaking rolling using the standby device can be appropriately combined. Therefore, the idle time of a hot rolling mill can be reduced, the number of rolled materials to be rolled can be increased, and rolling efficiency can be improved.
本発明の実施形態を図面に基づいて説明する。 Embodiments of the present invention will be described with reference to the drawings.
図１は、本発明の一実施形態に係る熱間圧延設備のレイアウトと、その熱間圧延設備を用いた鋼材の熱間圧延方法の手順を示す図である。 FIG. 1 is a diagram showing a layout of a hot rolling facility according to an embodiment of the present invention and a procedure of a hot rolling method of a steel material using the hot rolling facility.
図１に示すように、この実施形態に係る熱間圧延設備は、上流側から順に、加熱炉１、第１の水冷装置（前面水冷装置）２、待機装置としての保持装置３、可逆式熱間圧延機４、第２の水冷装置（後面水冷装置）５を備えている。 As shown in FIG. 1, the hot rolling facility according to this embodiment includes, in order from the upstream side, a heating furnace 1, a first water cooling device (front water cooling device) 2, a holding device 3 as a standby device, and reversible heat. A rolling mill 4 and a second water cooling device (rear water cooling device) 5 are provided.
ここで、可逆式熱間圧延機４の上流側に設けられている保持装置３は、高温の圧延材を搬送テーブル上から後続の圧延材が通過できる高さに持ち上げて保持し、所定温度になるまで空冷・待機させるためのものである。また、保持装置３の上流側に設けられた前面水冷装置２と、可逆式熱間圧延機４の下流側に設けられた後面水冷装置５は、それぞれ、高温の圧延材を所定の温度まで冷却するためのものである。 Here, the holding device 3 provided on the upstream side of the reversible hot rolling mill 4 lifts and holds the high-temperature rolled material to a height at which the subsequent rolled material can pass from the conveying table, and keeps it at a predetermined temperature. It is for air cooling and waiting until it becomes. The front water cooling device 2 provided on the upstream side of the holding device 3 and the rear water cooling device 5 provided on the downstream side of the reversible hot rolling mill 4 each cool the hot rolled material to a predetermined temperature. Is to do.
そして、前面水冷装置２、保持装置３、後面水冷装置５には、それぞれ、圧延材の温度を測定するための温度計６、７、８が設けられている。 The front water cooling device 2, the holding device 3, and the rear water cooling device 5 are provided with thermometers 6, 7, and 8 for measuring the temperature of the rolled material, respectively.
そして、これらの熱間圧延設備を利用して、２枚の制御圧延材（第１のスラブＡ、第３のスラブＣ）と１枚の通常圧延材（第２のスラブＢ）の圧延を行う場合には以下のような（１）〜（６）の手順で行う。ここで、制御圧延材は冷却待ちを要する鋼材の例として上げたものであり、通常圧延材は冷却待ちを要しない鋼材の例として上げたものである。 Then, using these hot rolling facilities, two control rolled materials (first slab A and third slab C) and one normal rolled material (second slab B) are rolled. In this case, the following steps (1) to (6) are performed. Here, the control rolled material is an example of a steel material that needs to wait for cooling, and the normal rolled material is an example of a steel material that does not need to wait for cooling.
なお、ここで、可逆式熱間圧延機４において制御圧延材を圧延する際に、スラブ厚（例えば、２１５ｍｍ）から制御圧延開始板厚（例えば、８０ｍｍ）までの圧延を粗圧延と呼び、制御圧延開始板厚から仕上板厚（仕上圧延後の板厚）までの圧延を仕上圧延と呼ぶことにする。 Here, when rolling the control rolling material in the reversible hot rolling mill 4, rolling from the slab thickness (for example, 215 mm) to the control rolling start plate thickness (for example, 80 mm) is called rough rolling, and control is performed. Rolling from the rolling start sheet thickness to the finished sheet thickness (sheet thickness after finish rolling) will be referred to as finish rolling.
（１）加熱炉１で所定温度（例えば、１１５０℃）に加熱された第１のスラブＡは、搬送テーブル上を搬送され、前面水冷装置２と保持装置３をそのまま通過して可逆式熱間圧延機４へ送られ、可逆式熱間圧延機４で第１のスラブＡの粗圧延が行われる。 (1) The 1st slab A heated to predetermined temperature (for example, 1150 degreeC) with the heating furnace 1 is conveyed on a conveyance table, passes the front surface water cooling apparatus 2 and the holding | maintenance apparatus 3 as it is, and is reversible hot The first slab A is roughly rolled by the reversible hot rolling mill 4.
（２）粗圧延を終了した第１のスラブＡは、保持装置３に送られ、保持装置３によって搬送テーブル上から持ち上げられて保持される。 (2) The first slab A that has finished the rough rolling is sent to the holding device 3 and is lifted and held by the holding device 3 from the conveyance table.
（３）続いて、可逆式熱間圧延機４での第１のスラブＡの粗圧延の進行に合わせて、第２のスラブＢが加熱炉１から抽出され、前面水冷装置２をそのまま通過し、保持装置２に持ち上げられている第１のスラブＡを追い越して可逆式熱間圧延機４に送られる。 (3) Subsequently, in accordance with the progress of the rough rolling of the first slab A in the reversible hot rolling mill 4, the second slab B is extracted from the heating furnace 1 and passes through the front water cooling device 2 as it is. The first slab A lifted by the holding device 2 is overtaken and sent to the reversible hot rolling mill 4.
（４）可逆式熱間圧延機４に送られた第２のスラブＢは、所定の仕上板厚まで圧延された後、後面水冷装置５をそのまま通過して、精整工程へ送られる。 (4) The second slab B sent to the reversible hot rolling mill 4 is rolled to a predetermined finishing plate thickness, and then passes through the rear water cooling device 5 as it is and sent to the finishing step.
（５）一方、保持装置３に保持されている第１のスラブＡは、第２のスラブＢの圧延中に搬送テーブル上に戻され、前面水冷装置２に送られて、所定の温度に冷却される。その際、第２のスラブＢの圧延が終了したら、直ちに第１のスラブＡの仕上圧延が開始できるように、保持装置３および搬送テーブル上での空冷時間と前面水冷装置２での水冷時間が調整されるが、ここでは、第２のスラブＢの圧延終了予測時刻まで前面水冷装置２で水冷しても、第１のスラブＡの温度を制御圧延可能な温度（例えば、８５０℃）まで冷却できないものとして、第１のスラブＡを第２のスラブＢの圧延終了時刻まで前面水冷装置２で水冷した上で、さらに、後述の（６）、（８）、（９）に示すように、後面水冷装置５で制御圧延可能な温度まで冷却する。なお、必要に応じて、第１のスラブＡの温度を温度計７および温度計６で測定し、その測定結果に基づいて、制御圧延可能な温度まで冷却するのに必要な水冷時間を再確認する。 (5) On the other hand, the 1st slab A currently hold | maintained at the holding | maintenance apparatus 3 is returned on a conveyance table during rolling of the 2nd slab B, is sent to the front surface water cooling apparatus 2, and is cooled to predetermined temperature. Is done. At that time, when the rolling of the second slab B is completed, the air cooling time on the holding device 3 and the transfer table and the water cooling time on the front water cooling device 2 can be started immediately after finishing rolling of the first slab A. Although adjusted, here, even if it is water-cooled by the front water-cooling device 2 until the rolling end prediction time of the second slab B, the temperature of the first slab A is cooled to a temperature at which control rolling is possible (for example, 850 ° C.) As what cannot be done, after water-cooling the 1st slab A with the front surface water-cooling device 2 until the rolling end time of the 2nd slab B, as shown in below-mentioned (6), (8), (9), It cools to the temperature which can be controlled-rolled with the rear surface water cooling apparatus 5. FIG. In addition, if necessary, the temperature of the first slab A is measured with the thermometer 7 and the thermometer 6, and the water cooling time necessary for cooling to a temperature at which control rolling is possible is reconfirmed based on the measurement result. To do.
（６）そして、第２のスラブＢが所定の仕上板厚まで圧延され、後面水冷装置５をそのまま通過して精整工程へ送られるのに合わせて、前面水冷装置２で水冷された第１のスラブＡが、可逆式熱間圧延機４をそのまま通過して後面水冷装置５に送られる。 (6) Then, the second slab B is rolled to a predetermined finish plate thickness, passes through the rear surface water cooling device 5 as it is, and sent to the finishing process, and is then water cooled by the front surface water cooling device 2. The slab A passes through the reversible hot rolling mill 4 as it is and is sent to the rear surface water cooling device 5.
（７）続いて、その間に、第３のスラブＣが加熱炉１から抽出され、前面水冷装置２と保持装置３をそのまま通過して可逆式熱間圧延機４へ送られる。そして、第３のスラブＣは可逆式熱間圧延機４で所定板厚まで圧延された後、可逆式熱間圧延機４の上流側に搬送され、前面水冷装置２に送られて水冷される。 (7) Subsequently, in the meantime, the third slab C is extracted from the heating furnace 1, passes through the front water cooling device 2 and the holding device 3 as it is, and is sent to the reversible hot rolling mill 4. And after the 3rd slab C is rolled to predetermined sheet thickness with the reversible hot rolling mill 4, it is conveyed to the upstream of the reversible hot rolling mill 4, and is sent to the front surface water cooling device 2 and water cooled. .
（８）一方、後面水冷装置５に送られた第１のスラブＡは、第３のスラブＣが所定板厚まで圧延されたら、直ちに第１のスラブＡの仕上圧延が開始できるように、後面水冷装置５での水冷時間が設定されるが、必要に応じて、温度計８によって第３のスラブＣの温度が測定され、その測定結果に基づいて、水冷時間が調整される。 (8) On the other hand, the first slab A sent to the rear surface water cooling device 5 has a rear surface so that when the third slab C is rolled to a predetermined plate thickness, finish rolling of the first slab A can be started immediately. Although the water cooling time in the water cooling device 5 is set, the temperature of the third slab C is measured by the thermometer 8 as necessary, and the water cooling time is adjusted based on the measurement result.
（９）そして、後面水冷装置５での水冷によって制御圧延可能な温度まで冷却された第１のスラブＡは、第３のスラブＣが可逆式熱間圧延機４の上流側に搬送されるのに合わせて、可逆式熱間圧延機４に送られ、所定の仕上板厚まで圧延された後、後面水冷装置５をそのまま通過して精整工程へ送られる。 (9) Then, in the first slab A cooled to a temperature capable of controlled rolling by water cooling in the rear water cooling device 5, the third slab C is conveyed to the upstream side of the reversible hot rolling mill 4. At the same time, the sheet is fed to the reversible hot rolling mill 4 and rolled to a predetermined finishing plate thickness, and then passes through the rear water cooling device 5 as it is to the finishing step.
（１０）それに続いて、前面水冷装置２に送られて所定温度まで水冷された第３のスラブＣが、可逆式熱間圧延機４に送られ、所定板厚まで圧延された後、後面水冷装置５をそのまま通過して精整工程へ送られる。 (10) Subsequently, after the third slab C sent to the front water cooling device 2 and cooled to a predetermined temperature is sent to the reversible hot rolling mill 4 and rolled to a predetermined plate thickness, rear water cooling is performed. It passes through the apparatus 5 as it is and is sent to the refining process.
このように、この実施形態においては、冷却待ちを要する制御圧延材２枚と通常圧延材１枚の圧延を行うに際して、前面冷却装置２および後面冷却装置４による冷却と、保持装置３を用いた追い越し圧延を適切に組み合わせているので、可逆式熱間圧延機４の空き時間をより低減して、圧延される圧延材の本数を増加させることができ、圧延能率を一層向上させることができる。 As described above, in this embodiment, when the two control rolled materials that require waiting for cooling and one normal rolled material are rolled, the cooling by the front cooling device 2 and the rear cooling device 4 and the holding device 3 are used. Since the overtaking rolling is appropriately combined, the idle time of the reversible hot rolling mill 4 can be further reduced, the number of rolled materials to be rolled can be increased, and the rolling efficiency can be further improved.
なお、この実施形態においては、上流側から、加熱炉１、前面水冷装置２、保持装置３、可逆式熱間圧延機４、後面水冷装置５の順に設置しているが、加熱炉１、保持装置３、前面水冷装置２、可逆式熱間圧延機４、後面水冷装置５の順に設置してもよい。 In this embodiment, the heating furnace 1, the front water cooling device 2, the holding device 3, the reversible hot rolling mill 4, and the rear water cooling device 5 are installed in this order from the upstream side. The apparatus 3, the front water cooling apparatus 2, the reversible hot rolling mill 4, and the rear water cooling apparatus 5 may be installed in this order.
また、この実施形態においては、圧延材の待機装置として、圧延材を搬送テーブル上から後続の圧延材が通過できる高さに持ち上げて保持する保持装置を用いている。これは、そのような保持装置であれば、圧延材を搬送テーブル上から移動したり、圧延材を搬送テーブル上に戻したりするのが容易であるからであるが、本発明は、それに限定されることはなく、例えば、圧延材を搬送テーブル上から横方向に移動させて、後続の圧延材が通過できるようにする横移動式の待機装置を用いてもよい。 Moreover, in this embodiment, the holding | maintenance apparatus which lifts and hold | maintains a rolling material on the height which can pass a subsequent rolling material from a conveyance table is used as a standby apparatus of a rolling material. This is because, with such a holding device, it is easy to move the rolled material from the transport table or return the rolled material onto the transport table, but the present invention is not limited thereto. For example, a horizontally moving standby device that moves the rolled material in the horizontal direction from the transfer table so that the subsequent rolled material can pass therethrough may be used.
さらに、この実施形態においては、圧延材が鋼材の場合を例にして説明したが、本発明は、それに限定されることはなく、圧延材がアルミニウム等の非鉄金属材料の場合にも適用することができる。 Furthermore, in this embodiment, the case where the rolled material is a steel material has been described as an example. However, the present invention is not limited thereto, and the present invention is also applicable to a case where the rolled material is a non-ferrous metal material such as aluminum. Can do.
１ 加熱炉
２ 前面水冷装置
３ 保持装置
４ 可逆式熱間圧延機
５ 後面水冷装置
６ 温度計
７ 温度計
８ 温度計
DESCRIPTION OF SYMBOLS 1 Heating furnace 2 Front surface water cooling device 3 Holding device 4 Reversible hot rolling mill 5 Rear surface water cooling device 6 Thermometer 7 Thermometer 8 Thermometer
Claims (3)
第１のスラブを前記可逆式熱間圧延機にて所定板厚まで圧延後、第１のスラブを前記待機装置によって搬送テーブル上から後続の圧延材が通過できる場所に待機させ、第２のスラブを前記可逆式熱間圧延機に送って圧延を行うとともに、待機装置で待機させた第１のスラブを搬送テーブル上に戻し、前記第１の冷却装置に送って所定の温度まで冷却し、その後、第２のスラブが可逆式熱間圧延機で所定板厚まで圧延されて下流側に搬送されるのに合わせて、第１のスラブを前記第２の冷却装置に送り、第２の冷却装置で第１のスラブを制御圧延可能な温度まで冷却する一方で、第３のスラブを前記可逆式熱間圧延機に送って所定板厚まで圧延した後、第３のスラブを上流側に搬送するとともに、第２の冷却装置で制御圧延可能な温度まで冷却された第１のスラブを前記可逆式熱間圧延機に送って仕上板厚まで圧延することを特徴とする熱間圧延方法。 A hot rolling method using the hot rolling equipment according to claim 1 or 2,
After rolling the first slab to a predetermined plate thickness with the reversible hot rolling mill, the first slab is made to stand by at the place where the subsequent rolling material can pass from the transfer table by the standby device, and the second slab Is sent to the reversible hot rolling mill and rolled, and the first slab, which has been kept on standby by the standby device, is returned to the transport table, sent to the first cooling device, and cooled to a predetermined temperature, and thereafter As the second slab is rolled to a predetermined thickness by a reversible hot rolling mill and conveyed downstream, the first slab is sent to the second cooling device, and the second cooling device While the first slab is cooled to a temperature at which control rolling is possible, the third slab is fed to the reversible hot rolling mill and rolled to a predetermined plate thickness, and then the third slab is conveyed upstream. At the same time, it is cooled to a temperature that can be controlled by the second cooling device. Hot rolling method characterized in that the first slab is rolled to a thickness finish sending the reversible hot rolling mill that.
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Cited By (7)
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|---|---|---|---|---|
| JP2011143459A (en) * | 2010-01-15 | 2011-07-28 | Jfe Steel Corp | Method for manufacturing thick steel plate |
| JP2011143460A (en) * | 2010-01-15 | 2011-07-28 | Jfe Steel Corp | Method for manufacturing thick steel plate |
| JP2011143462A (en) * | 2010-01-15 | 2011-07-28 | Jfe Steel Corp | Method for manufacturing thick steel plate |
| JP2011143461A (en) * | 2010-01-15 | 2011-07-28 | Jfe Steel Corp | Method for manufacturing thick steel plate |
| JP2011147962A (en) * | 2010-01-21 | 2011-08-04 | Jfe Steel Corp | Method for manufacturing thick steel plate and method for determining water-cooling pass number |
| JP2013099782A (en) * | 2011-10-17 | 2013-05-23 | Jfe Steel Corp | Method for manufacturing steel plate |
| JP2014069190A (en) * | 2012-09-27 | 2014-04-21 | Jfe Steel Corp | Hot rolling equipment, and hot rolling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6233613B2 (en) | 2016-01-26 | 2017-11-22 | Ｊｆｅスチール株式会社 | Production line for hot-rolled steel strip and method for producing hot-rolled steel strip |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2011143459A (en) * | 2010-01-15 | 2011-07-28 | Jfe Steel Corp | Method for manufacturing thick steel plate |
| JP2011143460A (en) * | 2010-01-15 | 2011-07-28 | Jfe Steel Corp | Method for manufacturing thick steel plate |
| JP2011143462A (en) * | 2010-01-15 | 2011-07-28 | Jfe Steel Corp | Method for manufacturing thick steel plate |
| JP2011143461A (en) * | 2010-01-15 | 2011-07-28 | Jfe Steel Corp | Method for manufacturing thick steel plate |
| JP2011147962A (en) * | 2010-01-21 | 2011-08-04 | Jfe Steel Corp | Method for manufacturing thick steel plate and method for determining water-cooling pass number |
| JP2013099782A (en) * | 2011-10-17 | 2013-05-23 | Jfe Steel Corp | Method for manufacturing steel plate |
| JP2014069190A (en) * | 2012-09-27 | 2014-04-21 | Jfe Steel Corp | Hot rolling equipment, and hot rolling method |
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