Control process for performances of steel plate during hot rolling and flat rolling process of single-stand steckel mill

Abstract

The invention discloses a control process for performances of a steel plate during hot rolling and flat rolling process of a single-stand steckel mill, which is characterized in that the steel burning temperature at two ends of a heating furnace is 15-40 DEG C higher than that in the middle, the tail temperature of the billet is 10-25 DEG C higher than that at the head; on the procedure without adoption of the steckel mill for scale removal, an air purging system is started and no accumulated water is left on the surface during the rolling process; after a pyrometer detects that the temperature difference of a rolled piece is larger than 50 DEG C, the mill increases the steel throwing speed by an acceleration smaller than 0.02m / s<2>; after a pyrometer detects that the temperature difference of a rolled piece is larger than 30 DEG C, a laminar flow system automatically closes the last one to three groups of cooling water, so as to improve the temperature rise at the tail of the rolled piece and reduce the temperature rise difference of the rolled piece; and for a wide steel plate, a cooling system adopts edge shielding so as to remove temperature difference between the upper edge and the middle along the width direction. By adopting the process in the invention, the performance uniformity of the steel plate flatly rolled by the single-stand steckel mill can be ensured.

Description

technical field [0001] The invention belongs to the field of steel rolling, and relates to a process for flat-rolling steel plates with a single-stand furnace rolling mill, in particular to a performance control process for hot-rolling flat-rolled steel plates with a single-stand furnace coil mill for improving the performance uniformity of steel plates. Background technique [0002] At present, when the single-stand furnace coil mill is hot-rolling flat-rolled steel, as the billet becomes thinner and thinner during the rolling process, the temperature drop of the rolled piece becomes faster and faster, especially along the length direction of the steel plate, the actual temperature difference of the steel plate after rolling is at Above 100°C, the corresponding performance fluctuation is above 50MPa. After the rolled piece enters the cooling water, the temperature difference along the length of the steel plate will worsen after cooling, especially the temperature at the tail...

AI Technical Summary

Problems solved by technology

Especially for billets with a rolling length of more than 9m, during the rolling process, as the steel plate becomes thinner and thinner during the rolling process, the temperature drop of the steel plate will become faster and faster, resulting in an extremely uneven temperature distribution along the length of the rolled piece. Uniform, resulting in uneven or even inconsistent performance distribution

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