Diversified cross-connection control method for plate shape of hot rolling band steel

Abstract

A hot rolling bandprofil pluralism intersect control method is suitable for controlling the shape of strip in the hot rolling band steel production line. The purpose is to improve the potential shape of the hot rolling band steel and increase the product quality; the method aims at the hot rolling band steel production line of a fining mill set which is provided with seven rolling mills (F1-F7), firstly, the rolling loading and the bowed roll force dynamic control are adjusted; the thermal state target alignment controlling value is modified; micro-waves are used for rolling; the alignment target reference value is 0 I-unit; the target alignment -5 I-unit- -10 I-unit is taken; laminated cooling CTC adopts aftercooling mode; the heat stress of the band steel generated in a run out table ROT is reduced; the reeling target temperature CT is mended within 600 DEG C-650 DEG C; the working roll of the sixth rolling mill (F6) of the fining mill set shifts rolls for compensation; the use of cooling water among the rolling mills is optimized.

Description

technical field [0001] The invention relates to a method for improving the shape quality of hot-rolled steel strip products. Background technique [0002] With the gradual adoption of high-speed automatic production lines in the iron and steel industry, higher and higher requirements are put forward for the size and appearance of strips, which promotes the continuous development of flatness control technology. The cross-sectional profile (Profile) and flatness (Flatness) of the strip are two important aspects currently used to describe the shape of the strip. Strip rolling has a main requirement for the strip deformation process, that is, along the width direction of the strip, each point has a uniform longitudinal extension. If the transverse reduction is unevenly distributed, each point will have uneven extension correspondingly, and internal stress of interaction will be generated between each point. When the internal stress is large enough, it will cause the steel stri...

AI Technical Summary

Problems solved by technology

However, it may change during subsequent cooling, coiling, etc.

Therefore, the only way is to perform uncoiling inspection at the inspection line to level or straighten the strip, however, this process greatly increases the production cost

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