EFFECT OF PLATE SURFACE CONDITIONS ON ACCELERATED COOLING PERFORMANCE
EFEITO DAS CONDIÇÕES SUPERFICIAS DA CHAPA NO DESEMPENHO DO RESFRIAMENTO ACELERADO
Emanuelle Garcia Reis, Antonio Augusto Gorni, Daniel Bojikian Matsubara, Edmar de Souza Silva, Ian Robinson, José Herbert Dolabela da Silveira, Rafael Abreu Fraga, Rodney Pardo Alves
Abstract
The purpose of the accelerated cooling process during plate production is to increase the mechanical strength of the final plate, together with improved toughness and weldability, in lower carbon equivalent steels. This process is affected by the quality of the plate surface during cooling, the plate shape after rolling and the conditions of the cooling process itself. These conditions need to be carefully controlled and are mostly influenced by the scale formation and the temperatures uniformity of the product; from the slab reheating to the end of the accelerated cooling. The surface descaling must be performed in an integrated manner that achieves a homogeneous temperature profile after accelerated cooling, over the entire plate in three dimensions: thickness, width and length.
Keywords
Resumo
O objetivo do processo de resfriamento acelerado na laminação de chapas grossas é promover o aumento da resistência mecânica do produto acabado, concomitantemente com a melhoria da tenacidade e da soldabilidade, em aços com menor carbono equivalente. Este processo tem a maior eficácia dependendo da qualidade da superfície da chapa que está sendo resfriada, da forma do esboço após a laminação e das condições do próprio processo de resfriamento. Para isto, as condições da formação da carepa, a uniformidade das temperaturas de processo, desde o aquecimento das placas até o final do resfriamento acelerado, as condições de descamação superficial devem ter todo o seu controle de processo executado de uma maneira integrada, que permita a uniformidade do resfriamento ao longo de todo o esboço, nas três dimensões: espessura, largura e comprimento.
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Referências
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Submetido em:
19/02/2020
Aceito em:
11/05/2020
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