A method for improving the wave shape of the edge of the thin-gauge container board

Abstract

The invention discloses a method for improving the wave shape of edges of a thin container plate and belongs to the technical field of the steel rolling process. The method for improving the wave shape of the edges of the thin container plate comprises the steps that an edge heater is arranged at an inlet of a finishing mill and used for heating two side edges of an intermediate blank; an automatic control system is used for controlling the heating temperature of the edge heater; an edge shielding device is arranged on a laminar cooling manifold and used for controlling the cooling position of the edges of strip steel; the automatic control system is used for controlling the shielding position of the edge shielding device. By means of the method for improving the wave shape of the edges of the thin container plate, the problem that double-edge waves exist on rolled finished products can be effectively solved, the quality of the plate shape of the products is improved, and the yield of the products is increased.

Description

technical field [0001] The invention relates to the technical field of steel rolling technology, in particular to a method for improving the edge corrugation of thin-gauge container plates. Background technique [0002] The 1580mm rolling line of Qianyang Iron and Steel Co., Ltd. is mainly based on silicon steel and thin-gauge container plate. Among them, the thin-gauge container plate has achieved stable batch production at the end of 2009. Based on the high requirements of customers for the shape and quality of the product, especially the double-sided corrugation, the product plate Shape quality has been continuously improved as the focus of research. In order to improve the shape quality of the product, like other steel mills, Qianyang Iron and Steel Co., Ltd. adopts rolling line production, and then performs a certain reduction rate leveling in the leveling process to improve the shape quality. Slight double-sided wave problem can be effectively improved once in the lev...

AI Technical Summary

Problems solved by technology

This has become a difficult point for Qiangang to produce thin container plates in batches. In order to make up for the temperature uniformity problem of the head and tail of the intermediate billet caused by the coil box without plate, and at the same time shorten the rolling time as much as possible, and increase the finish rolling temperature of the strip tail, Qiangang Implemented a special process system: high final rolling temperature + low coiling temperature, that is, through high final rolling temperature to increase the power acceleration of the rolling mill and shorten the rolling time; but another problem brought about by this is the shape of the product Problem: Generally, in the production process of the rolling line, due to the low final rolling temperature at the head of the strip, when the same coiling temperature is reached, the number of cold headers in the head layer is small at the beginning; and with the increase of the rolling length , the finish rolling temperature increases gradually, and at the same coiling temperature, the opening number of layer cooling cooling headers increases significantly, and the cooling intensity increases, resulting in an increase in the temperature difference between the edge and the middle of the strip, and resulting in lateral inward stress problem

In the process of subsequent uncoiling and use, obvious bilateral waves will be formed, which will affect the use of the customer's plate shape

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