Tecnologia em Metalurgia, Materiais e Mineração
https://tecnologiammm.com.br/article/doi/10.4322/tmm.2013.023
Tecnologia em Metalurgia, Materiais e Mineração
Artigo Original

AVALIAÇÃO NUMÉRICA DA DISTRIBUIÇÃO DE TEMPERATURA EM CILINDROS DE LAMINAÇÃO

NUMERICAL EVALUATION OF TEMPERATURE DISTRIBUTION IN THE ROLLING MILL ROLLS

Lira Junior, José Claudino de; Henríquez, Jorge Recarte; Dutra, José Carlos C.

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Resumo

Nos processos de laminação a quente, ocorrem mudanças no perfil dos cilindros de laminação (expansão e contração) e desgastes constantes devido aos esforços mecânicos e aos ciclos térmicos de aquecimentos/resfriamentos contínuos a que são submetidos pelo contato material-cilindro e pelo sistema de resfriamento por jatos de água na sua superfície, diminuindo a sua vida útil. Este trabalho tem como objetivo apresentar um modelo computacional para simular o comportamento térmico dos cilindros de laminação. O modelo foi elaborado utilizando o método dos volumes finitos para um sistema bidimensional transiente e permite calcular a distribuição de temperatura do cilindro em diversas condições de serviço. Investiga-se a influência da vazão e da temperatura da água de resfriamento sobre a distribuição de temperatura no cilindro. Os resultados mostram que a temperatura da água tem maior influência do que a vazão no controle da temperatura superficial dos cilindros

Palavras-chave

Cilindros de laminação, Simulação numérica, Transferência de calor

Abstract

In hot rolling processes occur changes in the profile of the rolling mill rolls (expansion and contraction) and constant wear due to mechanical stress and continuous thermal cycles of heating/cooling caused by contact rolled material- working roll and the cooling system by water jets in their surface, decreasing their lifetime. This paper presents a computational model to simulate the thermal performance of rolling mill rolls. The model was developed using the finite volume method for a transient two-dimensional system and allows calculating the temperature distribution of the rolling mill rolls under various conditions of service. Here it is investigated the influence of flow rate and temperature of the cooling water on the temperature distribution. The results show that the water temperature has greater influence than the water flow to control the surface temperature of the cylinders.

Keywords

Rolling mill rolls, Numerical simulation, Heat transfer

Referências



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