Method for controlling occurrence rate of strip-shaped chromatic aberration on surface of pickled low-carbon aluminum killed steel

Abstract

The invention provides a method for controlling occurrence rate of a strip-shaped chromatic aberration on surface of a pickled low-carbon aluminum killed steel, and belongs to the technical field of steel rolling. The method comprises the steps that molten steel is subjected to continuous casting, and a plate blank is obtained; the plate blank is subjected to surface cleaning, heating before rolling, rough rolling, finish rolling, cooling after rolling and coiling, and the low-carbon aluminum killed steel is obtained; the mass fraction of B in the molten steel is controlled to range from 0.001% to 0.005%; in the continuous casting process, the mass fraction of C in the casting powder is 2.7-3.3%, and the mass fraction of Na2O is 7-8%; the temperature of a soaking zone for heating before rolling is controlled to be 1250-1260 DEG C, the time of the soaking zone is controlled to be 30-40 min, and the total in-furnace time is controlled to be 160-200 min. The method can effectively reduce occurrence rate of strip-shaped chromatic aberration on the surface of the hot-rolled and pickled low-carbon aluminum killed steel, and improves surface quality of the hot-rolled and pickled low-carbon aluminum killed steel.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a method for controlling the occurrence rate of striped color difference on the surface of low-carbon aluminum-killed steel after pickling. Background technique [0002] As a new type of plate and strip production and development, pickling plate uses high-quality hot-rolled thin plate as raw material, and is used as a finished product after the oxide layer is removed by the pickling unit, trimmed, and finished. Its surface quality and use requirements are between hot-rolled plate Between and cold-rolled sheets, it is an ideal substitute for some cold-rolled sheets. The main uses of domestic hot-rolled pickling plates are: motorcycle body and structural parts, compressor shells in the home appliance industry, wheels, chassis and structural parts of passenger cars and cars, etc. Product features include: 1) Make up for the thick-gauge products that are difficult ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of striped color difference on the surface of low-carbon aluminum-killed steel after hot rolling and pickling, the present invention provides a method to control the low-carbon aluminum-killed steel A method for the occurrence rate of banded color difference on the surface after pickling, which can effectively reduce the incidence rate of banded color difference on the surface of hot-rolled pickled low-carbon aluminum-killed steel, and improve the surface quality of hot-rolled pickled low-carbon aluminum-killed steel

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