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首先建立了棒材热轧制过程的数学模型。以某钢厂棒材轧线180 mm×180 mm坯料为研究对象,进行1/4建模和模拟计算。结果显示,模拟值和实验值误差在5%以内,粗轧过程中坯料温降较快,中轧过程中坯料温降较慢且逐渐趋于平缓,精轧过程中截面平均温度和中心温度一直上升,精轧后的断面温差相对较大;椭圆孔轧制后的表面温度均匀性要好于圆孔轧制,出炉温度越低,轧制过程中温度越低,随着轧制速度的增加,轧件表面温度逐渐增加,精轧阶段孔径越小,轧制后的轧件表面温度越高。
First, the mathematical model of the hot rolling process of bar is established. Taking a 180 mm × 180 mm blank of rolling line of a steel mill as the research object, 1/4 modeling and simulation were carried out. The results show that the error between the simulated value and the experimental value is within 5%, the blank temperature decreases rapidly in the rough rolling process, and the blank temperature decreases slowly and gently in the mid-rolling process. The average cross-section temperature and the center temperature in the finishing process have been The temperature difference of the cross section after the finish rolling is relatively larger; the surface temperature uniformity after the elliptic hole rolling is better than that of the round hole rolling; the lower the firing temperature is, the lower the temperature during the rolling is. With the increase of the rolling speed, Rolling surface temperature gradually increased, the smaller the finish rolling stage pore size, the rolling rolling surface temperature higher.