Ultrathin color-coated base cold rolling plate shape control method

Abstract

The invention relates to an ultrathin color-coated base cold rolling plate shape control method which comprises the following steps of selecting an ultrathin color-coated base hot rolling raw material: convexity: 20-60 micrometers, or 25-65 micrometers or 30-70 micrometers, and a wedge degree: less than or equal to 20 micrometers, evaluating local high / concave points of a cross section of band steel, controlling and increasing middle extension of the band steel with a micro-moderate wave mode, evaluating a cold rolling color-coated base plate shape, dividing the band steel into a measurement area A and a measurement area B in a width direction, and evaluating wave height differences of any three adjacent points in the area A and the area B respectively. The method can greatly improve the band steel plate shape control capability of a cold rolling procedure, and effectively controls middle ribbing and middle strip wave defects of the band steel.

Description

technical field [0001] The invention relates to a method for controlling the shape of a cold-rolled ultra-thin color-coated base material, in particular to a technology for controlling the shape of an ultra-thin color-coated base material in a pickling and cold-rolling production line using CSP hot-rolled raw materials. Background technique [0002] The production of color-coated sheets needs to go through four production processes: hot rolling, pickling and cold rolling, galvanizing, and color coating. The extremely thin color-coated sheets have very high requirements on the shape of the sheets, and slight shape defects in raw materials will cause color-coated sheets Defects such as missed coating and uneven coating. The cold rolling process has a great influence on the final shape quality of the color-coated sheet. Maanshan Iron and Steel's pickling and cold rolling production line is a four-stand continuous rolling mill, and the rolling mills are all six-high UCM rolling...

AI Technical Summary

Problems solved by technology

Due to the stability of the wave shape control ability of the ultra-thin and thin-sized products of Masteel’s cold-rolling production line, the ability to improve the strip shape is not strong, resulting in serious defects such as ribbing in the middle of the ultra-thin color-coated base material and narrow strips.

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