阅读说明：本技术 一种热轧带钢的制备方法 (Preparation method of hot-rolled strip steel ) 是由 程传永 朴鳳錫 刘雷 高军凯 王晓军 范礼松 徐锞 于 2019-11-29 设计创作，主要内容包括：本发明提供一种热轧带钢的制备方法,包括加热、粗轧、精轧和卷取工序,所述精轧工序中,在精轧机组的7台连续式轧机F1-F7正常轧制生产的情况下,带钢进入精轧机前,在控制器内输入所述7台连续式轧机F1-F7的轧制参数,轧制参数包括负荷分配系数、活套单位张力系数,然后投入轧制生产；当精轧机组最后一个轧机F7咬钢后,根据仪表反馈的带钢头部实测数据,固化自动厚度控制AGC增益值。本发明通过负荷分配、AGC增益调整、优化活套张力作业,从而解决一系列牌号硅钢的轧制出现的厚度和宽度波动问题,该方法提高热轧带钢宽度控制精度,从而减少了实际生产控制中厚度和宽度波动,进而提高了到成品的厚度及宽度命中率,避免出现堆钢情况的发生。(The invention provides a preparation method of hot-rolled strip steel, which comprises the working procedures of heating, rough rolling, finish rolling and coiling, wherein in the finish rolling working procedure, under the condition that 7 continuous rolling mills F1-F7 of a finish rolling unit are normally rolled and produced, before the strip steel enters the finish rolling mills, rolling parameters of the 7 continuous rolling mills F1-F7 are input into a controller, and the rolling parameters comprise load distribution coefficients and unit tension coefficients of loops, and then the strip steel is put into rolling production; and after the last rolling mill F7 of the finishing mill group bites steel, solidifying the automatic thickness control AGC gain value according to the measured data of the strip steel head fed back by the instrument. The method solves the problem of thickness and width fluctuation caused by rolling of a series of grades of silicon steel by load distribution, AGC gain adjustment and optimized loop tension operation, improves the width control precision of the hot-rolled strip steel, reduces the thickness and width fluctuation in actual production control, further improves the thickness and width hit rate of finished products, and avoids the occurrence of steel piling.)

1. The preparation method of the hot-rolled strip steel comprises the working procedures of heating, rough rolling, finish rolling and coiling, and is characterized in that: in the finish rolling procedure, under the condition that 7 continuous rolling mills F1-F7 of a finish rolling mill group are normally rolled and produced, before strip steel enters the finish rolling mill, rolling parameters of the 7 continuous rolling mills F1-F7 are input into a controller, wherein the rolling parameters comprise load distribution coefficients and unit tension coefficients of a loop, and the load distribution coefficients of the 7 continuous rolling mills F1-F7 are sequentially set to be 1, 0.8, 0.68, 0.65, 0.6, 0.5 and 0.45 according to the sequence; the unit tension coefficient of the loop comprises an overall tension coefficient and compensation coefficients among racks, the overall tension coefficient is 1.15, and the compensation coefficients among the racks of the following 6 continuous rolling mills F2-F7 are sequentially set to be 0.75, 0.8, 0.85, 1.025, 1.03 and 1.05; and then putting the steel into rolling production, solidifying the automatic thickness control AGC gain value according to the measured data of the head of the strip steel fed back by the instrument after the last rolling mill F7 of the finishing mill group bites the steel, and sequentially setting the AGC gain values of the 7 continuous rolling mills F1-F7 to be 0.8, 0.75, 0.7, 0.6, 0.5, 0.4 and 0.3 according to the sequence.

2. The method of producing a hot rolled steel strip as claimed in claim 1, wherein: the strip steel is silicon steel.

3. The method of producing a hot rolled steel strip as claimed in claim 2, characterized in that: the grade of the silicon steel is W1300, W800 or W600.

4. The method of producing a hot rolled steel strip as claimed in claim 1, wherein: the rough rolling outlet temperature of the strip steel is 1000 +/-20 ℃.

5. The method of producing a hot rolled steel strip as claimed in claim 1, wherein: the rough rolling width of the strip steel is 1000-1350mm, and the rough rolling thickness is more than 2 and less than or equal to 3 mm.

Technical Field

The invention belongs to the technical field of steel processing and manufacturing, and relates to a preparation method of hot-rolled strip steel.

Background

The thickness and width of the finished hot-rolled strip steel are important indexes of the quality and performance of the product, and the setting precision of rolling parameters determines the performance of the product. In order to ensure that the thickness and the width of a finished product meet the process requirements, the position of the phase change of the silicon steel Ar3 is considered, and the conditions that the thickness and the width of the finished product are influenced and even the steel piling condition is caused by the fluctuation of the rolling force of strip steel in a finishing mill set, the imbalance of second flow and the fluctuation of tension between frames due to the phase change and the fluctuation of the thickness and the width of the finished product caused by the inaccurate rolling parameters are avoided.

Disclosure of Invention

The technical problem to be solved is as follows: aiming at the technical problems, the invention provides a preparation method of hot-rolled strip steel.

The technical scheme is as follows: the invention provides a preparation method of hot-rolled strip steel, which comprises the working procedures of heating, rough rolling, finish rolling and coiling, wherein in the finish rolling working procedure, under the condition that 7 continuous rolling mills F1-F7 of a finish rolling unit are normally rolled and produced, before the strip steel enters a rolling mill, rolling parameters of the 7 continuous rolling mills F1-F7 are input into a controller, wherein the rolling parameters comprise load distribution coefficients and unit tension coefficients of a piston sleeve, and the load distribution coefficients of the 7 continuous rolling mills F1-F7 are sequentially set to be 1, 0.8, 0.68, 0.65, 0.6, 0.5 and 0.45; the unit tension coefficient of the loop comprises an overall tension coefficient and compensation coefficients among racks, the overall tension coefficient is 1.15, and the compensation coefficients among the racks of the following 6 continuous rolling mills F2-F7 are sequentially set to be 0.75, 0.8, 0.85, 1.025, 10.3 and 10.5; then putting the steel into rolling production; and after the last rolling mill F7 of the finishing mill group bites steel, according to measured data of the head of the strip steel fed back by the instrument, the AGC gain value is solidified and automatically controlled in thickness, and the AGC gain values of the 7 continuous rolling mills F1-F7 are sequentially set to be 0.800, 0.75, 0.7, 0.6, 0.5, 0.4 and 0.3.

The strip steel is silicon steel.

The grade of the silicon steel is W1300, W800 or W600.

The rough rolling outlet temperature of the strip steel is 1000 +/-20 ℃.

The rough rolling width of the strip steel is 1000-1350mm, and the rough rolling thickness is more than 2 and less than or equal to 3 mm.

Has the advantages that: the method solves the problem of thickness and width fluctuation caused by rolling of a series of grades of silicon steel by load distribution, AGC gain adjustment and optimized loop tension operation, improves the width control precision of the hot-rolled strip steel, reduces the thickness and width fluctuation in actual production control, further improves the thickness and width hit rate of finished products, and avoids the occurrence of steel piling.

Drawings

FIG. 1 shows the thickness and width curves (curve 1-thickness curve; curve 2-width curve) of the finished hot-rolled silicon steel product W800 before the pre-conditioning process.

FIG. 2 is a graph showing the thickness and width of the finished product W800 of hot-rolled silicon steel after the pre-conditioning process (curve 1-thickness curve; curve 2-width curve).

Detailed Description

The invention is further explained below with reference to the drawings.