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

A technology for solidifying shells and continuous casting slabs, which is applied to the improvement of continuous casting slab center segregation and the field of slab continuous casting solidification process. Effect of center segregation and avoiding excessive segregation

Inactive Publication Date: 2009-07-15
CHONGQING UNIV
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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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  • Method for improving continuous casting plate blank central segregation based on growth morphology analysis of coagulating shell
  • Method for improving continuous casting plate blank central segregation based on growth morphology analysis of coagulating shell

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Embodiment Construction

[0028] The invention is successfully applied and tested in the actual production of domestic continuous casting machines. For example, the layout structure of the secondary cooling nozzle of a certain continuous casting machine is not reasonable enough, and the cooling intensity distribution in the width direction of the slab is uneven.

[0029] Adopting the method of the present invention, that is: ① using a computer system to simulate the cooling and solidification behavior of the slab in a certain continuous casting process through a two-dimensional heat transfer simulation model of continuous casting slab solidification, and obtain the slab solidification in the entire continuous casting process Shell growth morphology and temperature distribution state values, when the secondary cooling intensity distribution is uneven, the solidification shell morphology of the continuous casting slab section and the surface temperature distribution in the width direction of the inner arc...

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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...

Claims

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Application Information

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IPC IPC(8): B22D11/11B22D27/04
Inventor 陈登福龙木军张健靳星王水根陈嫚丽宋立伟赵岩高兴健杨晓东王青峡王启明刘强
Owner CHONGQING UNIV
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