Control method for plate shape of high-strength steel plate

Abstract

The invention provides a method for controlling the shape of a high-strength steel plate. The method comprises the main steps of heating, rolling, cooling after rolling and straightening; and the heating temperature, the rolling pressure, the rolling temperature, the single-pass reduction amount, the rolling speed, the cooling temperature and the like are controlled. The method has simple operation, simplifies production procedure, shortens production cycle, reduces the transportation and transferring of the steel plate in the middle procedure, saves energy consumption, reduces the increase of unscheduled quantity and can achieve good plate shape; and practices prove that the performance of the steel plate is unchanged, meets various standards and has obvious economical benefit.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and relates to a method for controlling the shape of a high-strength steel plate. Background technique [0002] In the current production process, the problem of plate shape buckling of high-strength steel plates has always existed, especially in the production of process steel with a yield point greater than 450MPa and low-carbon bainitic steel with a final rolling temperature below 800°C, which cannot fully meet its requirements. Production process requirements. Due to the low final rolling temperature of this type of steel in the later stage of rolling and the limited capacity of the rolling mill, the extension of the steel plate on the rolling surface is large, the extension of the center is small, the internal stress of the steel plate is large, and small wave bends are generated. The effect of straightening is not obvious, so that If the unevenness exceeds the standard, it will cause...

AI Technical Summary

Problems solved by technology

[0002] In the current production process, the problem of plate shape buckling of high-strength steel plates has always existed, especially in the production of process steel with a yield point greater than 450MPa and low-carbon bainitic steel with a final rolling temperature below 800°C, which cannot fully meet its requirements. Production process requirements

Due to the low final rolling temperature of this type of steel in the later stage of rolling and the limited capacity of the rolling mill, the extension of the steel plate on the rolling surface is large, the extension of the center is small, the internal stress of the steel plate is large, and small wave bends are generated. The effect of straightening is not obvious, so that The unevenness exceeds the standard, resulting in unplanned and waste products, causing large economic losses to the enterprise