Title

EVALUATION OF THE INFLUENCE OF THE ROLL CROWN SKIN-PASS ROLLING ON THE GENERATION OF RESIDUAL STRESS IN HOT STRIP

EVALUATION OF THE INFLUENCE OF THE ROLL CROWN SKIN-PASS ROLLING ON THE GENERATION OF RESIDUAL STRESS IN HOT STRIP

Authorship

Reis, Leonardo Camilo Dos; Andrade, Saulo Morais de; Wolff, Marco Antônio

Reis, Leonardo Camilo Dos

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Andrade, Saulo Morais de

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Wolff, Marco Antônio

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DOI

10.5151/2594-5297-39456

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Abstract

The market has demanded flat steel with an elevated level of quality, requiring, in addition to mechanical properties, surface roughness control and smaller tolerances in shape deviations. Currently, the world's steel industry has been directing efforts aimed at increasing the quality level of hot-rolled steels that pass through the Hot Skin-Pass (HSP). The goal of this study was to evaluate the influence of the HSP roll crown on the generation of residual stresses in the hot rolled strip. For that, a three-dimensional computational model was developed to determine the stresses and the shape of the strip when passing through the HSP. The results obtained indicated that, for the evaluated conditions, the HSP was not the main source in generating residual stresses along the width of the strip. In the high-strength steels residual stresses may come from previous processes, involving hot rolling and possible heterogeneous cooling rates. Through the study it was possible to eliminate the HSP as a source of generation of residual stresses, directing the efforts to obtain a better control of the shape of the high resistance steel strips.

The market has demanded flat steel with an elevated level of quality, requiring, in addition to mechanical properties, surface roughness control and smaller tolerances in shape deviations. Currently, the world's steel industry has been directing efforts aimed at increasing the quality level of hot-rolled steels that pass through the Hot Skin-Pass (HSP). The goal of this study was to evaluate the influence of the HSP roll crown on the generation of residual stresses in the hot rolled strip. For that, a three-dimensional computational model was developed to determine the stresses and the shape of the strip when passing through the HSP. The results obtained indicated that, for the evaluated conditions, the HSP was not the main source in generating residual stresses along the width of the strip. In the high-strength steels residual stresses may come from previous processes, involving hot rolling and possible heterogeneous cooling rates. Through the study it was possible to eliminate the HSP as a source of generation of residual stresses, directing the efforts to obtain a better control of the shape of the high resistance steel strips.

Keywords

Hot Skin-Pass; Computational simulation, Crown

Hot Skin-Pass; Computational simulation, Crown