Strip steel hot rolling control method

Abstract

The invention belongs to the technical field of strip steel production, and particularly relates to a strip steel hot rolling control method. The method comprises the steps of providing a plate blank;and controlling tapping operation of the provided plate blank in a control mode that the temperature of the head of the plate blank is higher than the temperature of the middle and the temperature ofthe tail of the plate blank. According to the strip steel hot rolling control method, the heating temperature of the head of the plate blank can be increased, the temperature of the head of the plateblank can be higher than the temperature of the middle and the temperature of the tail of the plate blank, the difference between the temperature of the head of the plate blank and the temperatures of the middle and the tail of the plate blank in the rolling process is reduced, and therefore the FDT hit rate of the head of strip steel can be guaranteed, the situation that the steel is stacked onthe head due to the fact that the head of the strip steel is broken through rolling operation is avoided, and then the hot rolling quality of the head of the strip steel is improved.

Description

technical field [0001] The invention belongs to the technical field of strip steel production, and in particular relates to a strip steel hot rolling control method. Background technique [0002] In the production of strip steel, the temperature control of the hot-rolled sheet is not only related to the performance of the finished product, but also affects the stability of the strip steel rolling, especially when rolling thin-gauge steel strips below 2.0mm, due to the temperature drop of the slab head The temperature drop is faster than the middle and tail of the slab, and it is easy to occur that the temperature of the strip head is low after the head strip is threaded, which will eventually lead to the FDT (finishing delivery temperature, final rolling temperature) hit rate of the strip head. At the same time, due to the low temperature of the strip head, the instantaneous bounce of the steel in the rolling mill becomes larger, and the excessive adjustment of the AGC (Auto...

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Problems solved by technology

[0002] In the production of strip steel, the temperature control of the hot-rolled sheet is not only related to the performance of the finished product, but also affects the stability of the strip steel rolling, especially when rolling thin-gauge steel strips below 2.0mm, due to the temperature drop of the slab head The temperature drop is faster than the middle and tail of the slab, and it is easy to occur that the temperature of the strip head is low after the head strip is threaded, which will eventually lead to the FDT (finishing delivery temperature, final rolling temperature) hit rate of the strip head. At the same time, due to the low temperature of the strip head, the instantaneous bounce of the steel in the rolling mill becomes larger, and the excessive adjustment of the AGC (Automatic Gauge Control, automatic thickness control) will cause the strip head to break and cause the head to pile up steel.

[0003] In the prior art, among the measures to improve the temperature of the thin-gauge strip head, the main method is to increase the strip-threading speed of the finishing mill. It is not conducive to the progress of the strip steel production process, therefore, it is necessary to improve the existing technology

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