Análise do mecanismo do broadening em aços SPHC e Q235 no lingotamento contínuo de placas, observando as propriedades termo-mecânicas.

Abstract

In the continuous casting of slabs, during the whole solidification process, there is a phenomenon of deformation in the transverse direction of the slab called broadening, where the ferrostatic pressure exerted by the liquid steel is contained by the mechanical resistance of the skin in the lateral region of the slab, formed in the part of the slab. of the mold, ie the thickness dimension. The mechanism is derived from a series of variables that together contribute to the mismatch in the width dimension of the produced plates. The subject will be explored through a literature review showing numerical simulations and experimental measurements in steelmaking. Broadening increases with casting speed and decreasing secondary cooling intensity. The decrease in mechanical strength of steel at high temperatures also contributes to plate widening. The carbon equivalent interferes in such a way that in a specific range a broadening presence is found to be of very concern. Understanding through a literature review on the phenomenon is fundamental to facilitate a production that meets the dimensional quality of the plate, which directly interferes with the lamination process, reducing operational problems and metal losses, increasing the process efficiency. This study aims to demonstrate by a series of numerical simulations in order to master its broadening formation and improve the efficiency of the LC process. In possession of the results, it is configured in the study possibilities of stabilization of the process.