A production method for controlling the transverse shape of high-quality carbon structural steel plate

Abstract

The invention relates to a production method for controlling the transverse shape of a high-quality carbon structural steel plate based on a single-stand wide and thick plate rolling line. 1080~1140℃, (2) Rolling: the slab rolling temperature is 1050~1100℃, the thickness of the intermediate billet is 30~200mm, and the water cooling device is used to cool the different thickness of the intermediate billet with different amounts of water, and the temperature at the end of the water cooling is controlled at In the range of 870-950°C, the final rolling temperature of the slab is 800-880°C; (3) the steel plate straightening and reddening temperature is controlled in the range of 600-700°C; the method of the present invention is that during the rolling process of the carbon structural steel plate, by collecting A series of key process temperature point control measures are implemented to obtain a lower straightening and reddening temperature, and to obtain a high-precision transverse plate shape without reducing the production efficiency of the rolling mill. By using the method of the present invention, the transverse unevenness of the final steel plate is less than or equal to 5mm. / Board width size, strong market competitiveness.

Description

technical field [0001] The invention relates to the technical field of hot-rolled wide and thick plates in the metallurgical industry, in particular to a production method for controlling the transverse shape of high-quality carbon structural steel plates based on a single-stand wide and thick plate rolling line. Background technique [0002] Steel grades 45 and 50 (carbon content of 0.42% to 0.55%, hereinafter referred to as "carbon plate") are the most common high-quality carbon structural steels in wide and thick plate products, and are widely used in machinery manufacturing, plastic molds and other industries. Due to the fierce competition of homogenization of carbon plate varieties in the wide and thick plate market, carbon plate end customers pay more attention to the applicability of their quality rather than compliance when choosing products. For example, the end customer of carbon plate puts forward the requirement of unevenness ≤7mm / (plate width dimension) for the ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that when the existing single-frame wide and thick plate production line produces carbon structural steel plates, the process accuracy cannot meet the customer’s requirements for high-precision horizontal plate shape, and at the same time, the existing method has low production efficiency of the rolling mill and high production cost. To solve the problem, provide a production method based on a single-stand wide and thick plate rolling line to control the transverse shape of high-quality carbon structural steel plates

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