Method for rolling thin high-strength steel plate of single-frame steckel mill

Abstract

The invention discloses a method for rolling a thin high-strength steel plate of a single-frame steckel mill. The method comprises the following steps: producing the finished product of a high-strength steel plate with a thickness less than 10 millimeters by using a blank with the thickness of 150 millimeters and the length more than 10 meters; and then acquiring the thin high-strength steel plate with qualified property and plate shape by controlling a tapping temperature, a coiler furnace temperature, a reduction in last pass, a roller force, a final rolling speed and a high pressure water de-scaling system. When the rolling method is used for producing the thin steel plate, the thin high-strength steel plate is rolled by utilizing the heat preservation function of front and back mill coiler furnaces and controlling the tapping temperature of the blank, the reduction in the last rolling pass, the roller force and the final rolling speed, and the acquired plate shape and property of the steel plate are both qualified, thereby increasing the rolling mill capacity and achieving high plate yield and high property yield.

Description

technical field [0001] The invention belongs to the field of steel rolling, and relates to a rolling process, in particular to a thin-gauge high-strength steel plate rolling process for a single-stand furnace coil rolling mill. Background technique [0002] At present, when a 150mm thick billet is used to roll a thin gauge high-strength steel plate below 10mm, the length of the billet does not exceed 4m. If the billet is too long, especially if the billet is longer than 10m, no matter how you increase the heating temperature or rolling speed, etc., because the rolled piece is too long, the temperature of the steel plate will drop faster and faster as the steel plate becomes thinner and thinner during the rolling process. , especially the temperature at the head and tail of the steel plate is faster, and the temperature distribution of the steel plate along the length direction is extremely uneven, which affects the overall performance of the rolled piece and the rolled shape...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of excessive temperature drop and excessive temperature difference in the prior art of rolling thin gauge high-strength steel plates with long billets, the problems of unsuitable performance and ultra-fast rolling force stop and waste, the purpose of the present invention is to provide a single machine The thin-gauge high-strength steel plate rolling process of the rack-steel rolling mill. When producing thin-gauge steel plates, especially when producing thin-gauge steel plates with long billets (the length of the billet can be up to 17m), the rolling process uses pre-machine and post-machine coiling. Taking the heat preservation effect of the furnace into consideration, by controlling the exit temperature of the billet, the reduction amount of the final rolling pass, the bending force, and the final rolling speed, a thin gauge (≤10mm) high-strength (480MPa≤σs≤1000MPa) steel plate is rolled to obtain The shape and performance of the plate meet the requirements

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