Method for improving continuous casting plate blank central segregation based on growth morphology analysis of coagulating shell

Abstract

The invention provides an improving method for the center segregation of a continuous casting sheet billet based on the growth appearance analysis of a solidifying shell, which comprises the following steps: simulating and analyzing the growth appearance of the solidifying shell of the continuous casting sheet billet in the actual production process of steel continuous casting through a solidified two-dimensional heat-transferring simulation model of the continuous casting sheet billet; researching a segregation forming area and the segregation degree of the continuous casting sheet billet; starting from a secondary cooling technological structure of the continuous casting sheet billet and the cooling distribution homogeneity of the width direction of the continuous casting sheet billet, and optimizing and adjusting the secondary cooling technological structure and a secondary cooling nozzle arranging system of a continuous casting machine, in particular to a cooling nozzle arranging structure on the width direction of the continuous casting sheet billet, so as to reach the aim of controlling and improving the center segregation quality problem of the continuous casting machine. The invention makes segregation solute be evenly distributed all parts of the center of the width direction of the continuous casting sheet billet, and avoids the excessive segregation at some place caused by the local segregation aggregation of solute elements, thereby effectively lightening the center segregation problem of the continuous casting sheet billet, in particular to a plate blank.

Description

technical field [0001] The invention relates to the field of continuous casting forming applied to iron and steel materials and other metal materials in metallurgical processes, in particular to a method for improving center segregation of continuous casting slabs based on solidification shell growth morphology analysis. It is suitable for the solidification process of continuous casting of various types of metal materials, especially the solidification process of continuous casting of slabs. Background technique [0002] With the continuous development of the world's steel industry, the continuous casting ratio of steel in many countries has reached saturation, especially in my country, the continuous casting ratio of steel has reached 99%, and the output of steel products continues to rank first in the world. However, most of my country's steel products are in the crude steel grade, and the product quality is not high. With the society's increasingly cost-effective requir...

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Problems solved by technology

[0016] Aiming at the problems of difficulty in controlling the center segregation of the continuous casting slab and high cost in the prior art, the purpose of the present invention is to provide a low-cost, easy-to-implement new method that can effectively improve the center segregation of the continuous casting slab, especially the slab—based on Improvement method of continuous casting slab center segregation for solidification shell growth morphology analysis

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