First of all, the thickness, width and temperature deviation of the blank, the temperature difference between the head and tail of the strip, and the uneven heating speed are the main reasons for the thickness difference between the strip and the same plate. Secondly, changes in strip tension will also cause changes in thickness. Changes in the thickness of the oil film in the oil film bearing caused by changes in strip speed will also cause changes in strip thickness. Finally, the roll eccentricity causes periodic changes in thickness.

The above is the reason for the excessive thickness difference on both sides of the hot-rolled steel strip.

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