JP2013123732A5 - Hot finish rolling method and hot rolled metal sheet manufacturing method - Google Patents

Hot finish rolling method and hot rolled metal sheet manufacturing method Download PDF

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JP2013123732A5
JP2013123732A5 JP2011273589A JP2011273589A JP2013123732A5 JP 2013123732 A5 JP2013123732 A5 JP 2013123732A5 JP 2011273589 A JP2011273589 A JP 2011273589A JP 2011273589 A JP2011273589 A JP 2011273589A JP 2013123732 A5 JP2013123732 A5 JP 2013123732A5
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finish rolling
rolling speed
hot
cooling amount
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JP5861435B2 (en
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次に、請求項４に記載した発明は、請求項１〜請求項３のいずれか１項に記載した構成に対し、上記目標冷却量が上記最大冷却量を越えると判定すると、その最大冷却量を越えると判定した切板部分に対し上記最大冷却量で冷却したときに仕上圧延機出側での板温度を仕上出側目標温度とすることが可能な仕上圧延速度の上限である上限仕上圧延速度を算出し、
上記予め設定されている仕上圧延速度パターンの最大仕上圧延速度を上記上限仕上圧延速度以下に変更して、対象とする板の仕上圧延速度パターンの再設定を行うことを特徴とする。
次に、請求項５に記載した発明は、請求項４に記載した発明に対し、上記仕上圧延速度パターンの再設定を行った場合には、上記目標冷却量を再計算することを特徴とする。
次に、請求項６に記載した発明は、請求項１〜請求項５のいずれか１項に記載の熱間仕上圧延方法によって熱間仕上圧延を行うことを特徴とする熱延金属板の製造方法である。 Next, when the invention described in claim 4 determines that the target cooling amount exceeds the maximum cooling amount with respect to the configuration described in any one of claims 1 to 3, the maximum cooling amount is determined. The upper limit finish rolling, which is the upper limit of the finish rolling speed that can make the plate temperature on the exit side of the finish mill the finish side target temperature when the cut plate portion determined to exceed the maximum cooling amount is cooled. Calculate the speed,
The maximum finish rolling speed of the preset finish rolling speed pattern is changed to the upper limit finishing rolling speed or less, and the finish rolling speed pattern of the target plate is reset.
Next, the invention described in claim 5 is characterized in that, when the finish rolling speed pattern is reset with respect to the invention described in claim 4, the target cooling amount is recalculated. .
Next, the invention described in claim 6 is the production of a hot-rolled metal sheet, characterized by performing hot finish rolling by the hot finish rolling method according to any one of claims 1 to 5. Is the method.

Claims (6)

熱延金属板の長手方向に沿って予め設定した仕上圧延速度パターンで仕上圧延を行いながら、冷却装置によって上記板を冷却して、仕上圧延機出側での板温度を仕上出側目標温度に制御する熱間仕上圧延方法において、
上記板を長手方向に沿って仮想分割した切板毎に、仕上圧延機入側の板温度から、仕上圧延機出側での板温度を上記仕上出側目標温度とするための目標冷却量を求め、
その目標冷却量が上記冷却装置で出力可能な最大冷却量を越えるか判定し、当該目標冷却量が上記最大冷却量を越えると判定した切板部分の仕上圧延速度を、上記仕上圧延速度パターンで設定された設定仕上圧延速度未満の仕上圧延速度に設定変更することを特徴とする熱間仕上圧延方法。 While performing finish rolling at a preset finish rolling speed pattern along the longitudinal direction of the hot-rolled metal plate, the plate is cooled by a cooling device, and the plate temperature at the finish rolling mill delivery side is set to the finish delivery target temperature. In the hot finish rolling method to control,
For each cut plate obtained by virtually dividing the plate along the longitudinal direction, from the plate temperature on the finishing mill entry side, the target cooling amount for setting the plate temperature on the exit side of the finishing mill as the finishing target temperature is set to Seeking
It is determined whether the target cooling amount exceeds the maximum cooling amount that can be output by the cooling device, and the finish rolling speed of the cut plate portion that is determined that the target cooling amount exceeds the maximum cooling amount is represented by the finish rolling speed pattern. A hot finish rolling method characterized in that the setting is changed to a finish rolling speed lower than the set finish finish rolling speed. 上記仕上圧延速度パターンの最大仕上圧延速度は、仕上圧延機で圧延可能な最大の仕上圧延速度若しくは、その最大の仕上圧延速度から予め設定した余裕速度分だけ低い仕上圧延速度に設定されていることを特徴とする請求項１に記載した熱間仕上圧延方法。   The maximum finish rolling speed of the above finish rolling speed pattern is set to the maximum finish rolling speed that can be rolled by a finish rolling mill or a finish rolling speed that is lower than the maximum finish rolling speed by a preset margin speed. The hot finish rolling method according to claim 1. 上記目標冷却量が上記最大冷却量を越えるか否かの判定は、対象とする熱延金属板の仕上圧延の実行前に実施することを特徴とする請求項１又は請求項２に記載した熱間仕上圧延方法。   The determination as to whether or not the target cooling amount exceeds the maximum cooling amount is performed before execution of finish rolling of the target hot-rolled metal sheet. Intermediate finish rolling method. 上記目標冷却量が上記最大冷却量を越えると判定すると、その最大冷却量を越えると判定した切板部分に対し上記最大冷却量で冷却したときに仕上圧延機出側での板温度を仕上出側目標温度とすることが可能な仕上圧延速度の上限である上限仕上圧延速度を算出し、
上記予め設定されている仕上圧延速度パターンの最大仕上圧延速度を上記上限仕上圧延速度以下に変更して、対象とする板の仕上圧延速度パターンの再設定を行うことを特徴とする請求項１〜請求項３のいずれか１項に記載した熱間仕上圧延方法。 If it is determined that the target cooling amount exceeds the maximum cooling amount, the plate temperature at the finishing mill exit side is finished when the cut plate portion determined to exceed the maximum cooling amount is cooled at the maximum cooling amount. The upper limit finishing rolling speed, which is the upper limit of the finishing rolling speed that can be set as the side target temperature, is calculated,
The maximum finishing rolling speed of the preset finishing rolling speed pattern is changed to be equal to or lower than the upper limit finishing rolling speed, and the finishing rolling speed pattern of the target plate is reset. The hot finish rolling method according to claim 3. 上記仕上圧延速度パターンの再設定を行った場合には、上記目標冷却量を再計算することを特徴とする請求項４に記載した熱間仕上圧延方法。   The hot finish rolling method according to claim 4, wherein when the finish rolling speed pattern is reset, the target cooling amount is recalculated. 請求項１〜請求項５のいずれか１項に記載の熱間仕上圧延方法によって熱間仕上圧延を行うことを特徴とする熱延金属板の製造方法。  A method for producing a hot-rolled metal sheet, comprising performing hot finish rolling by the hot finish rolling method according to any one of claims 1 to 5.
JP2011273589A 2011-12-14 2011-12-14 Hot finish rolling method and hot rolled metal sheet manufacturing method Expired - Fee Related JP5861435B2 (en)

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JP2013123732A5 true JP2013123732A5 (en) 2015-01-15
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CN105142813B (en) 2013-03-15 2017-04-05 诺维尔里斯公司 Manufacturing method and apparatus for directional cooling in hot metal rolling

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