A method for correcting the section size of thick plate continuous casting slab after cleaning

Abstract

The invention relates to a cross section size correcting method after the cleaning of a continuous casting billet of a thick plate. The method comprises the following steps: after the continuous casting billet is subjected to chamfering cleaning, measuring the straight-line distance R1 and R2 from a theoretical vertex of a chamfer to the end points of the arcs on the two sides, and considering the lost area of the chamfer as the area remained after 1 / 4 arc with the radius of R is subtracted from a rectangular with the side length of R; calculating the thickness reduction amount theoretical correcting value of the continuous casting billet after chamfering according to the formula which is shown in the specification, and rounding to obtain hx actual; and calculating the width reduction amount theoretical correcting value of the continuous casting billet after the chamfering according to the formula which is shown in the specification, and rounding to obtain wx actual, wherein the thickness correcting value after the continuous casting billet is cleaned is the plate billet thickness-hx actual before cleaning, and the width correcting value after the continuous casting billet is cleaned is the plate billet width-wx actual before the cleaning. According to the method, a mathematical model is established on the basis of comprehensively considering the loss caused by various cleaning modes, so that the method has the characteristic that the correcting size is more accurate; correcting values of continuous casting billets in regular specifications can be inquired in a list; the operability is high; the requirement on large-batch production is met; and the method is widely applied to thick plate production enterprises.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a method for correcting the section size of a thick plate continuous casting slab after cleaning. Background technique [0002] The physical quality of the slab is one of the factors that affect the quality of the thick plate product. In actual production, the surface of the continuous casting slab often has a certain degree of defects such as corner cracks, transverse and longitudinal cracks, and star cracks, which must be cleaned off the production line. The metal loss caused by continuous casting slab cleaning is reflected by the thickness loss and width loss on the cross section. For the situation of manually cleaning the slab, since it is impossible to completely level off after cleaning, it is a difficult job to correct the size after cleaning. At present, most of the medium and heavy plate factories in China only implement a single-dimensional correction for the thi...

AI Technical Summary

Problems solved by technology

In the case of manual cleaning of the slab, since it is impossible to completely flatten after cleaning, it is a difficult task to correct the size after cleaning

At present, most of the medium and heavy plate factories in China only implement a single-dimensional correction for the thickness of the slab, but with the control of the rolling size and plane shape, the requirements for the fineness of the raw materials at the input end are more stringent, and technologies such as the yield of thick plates With the further improvement of economic indicators, this rough calculation method can no longer meet the needs of production management

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