A method for controlling the orange-peel reticulate defect on the surface of steel strip

Abstract

The invention belongs to the technical field of hot rolling, and discloses a method for controlling orange peel reticulate pattern defects on the surface of strip steel. The method is characterized by comprising the following steps: adopting an SGB roll profile curve on a supporting roller of a hot rolling temper mill; adopting an SGW roll profile curve on a working roller. The process parameters of the temper mill are set as the rolling force of 200-250 tons, the unwinding tension of 9-12 tons, and the winding tension of 20-23 tons, the rolling reduction of straightening rollers is used in a straightening machine group, and a roller shifting strategy with constant frequency, variable step sizes and variable stroke is adopted. According to the method, through the application of the SGB and SGW roll profile curves, a specific smoothing process and the roller shifting strategy, local wear of working rollers is greatly reduced, and orange peel reticulate pattern defects on the surface of the strip steel are effectively overcome.

Description

technical field [0001] The invention relates to the technical field of hot rolling, in particular to a method for controlling the orange-peel reticulate defect on the surface of a steel strip. Background technique [0002] Thin-gauge hot-rolled products can partly replace cold-rolled products, realizing "replacing cold with heat", which is represented by hot-rolled container plates and pickling plates with a thickness of 1.5mm to 3mm. Such products generally require a leveling process to improve the shape quality of the strip, that is, to eliminate wave-shaped defects. Due to the high requirements not only on the shape quality of the plate, but also on the surface defects, this puts forward higher requirements for the hot-rolled tempering technology. [0003] The hot-rolled skinning process is a typical "dry" skinning. The surface of the strip is covered with obvious scale, and the skinning is completely carried out under the condition of no lubrication and cooling, resulti...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for controlling the orange-peel-like reticulation defect on the surface of the strip steel, which solves the problem of the orange-peel-like reticulation defect on the surface of the strip steel caused by the wear of the work rolls in the prior art, and achieves a great reduction in the control of the strip steel reticulation defect. Effect of Surface Orange Peel Defects

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