Modelo matemático para previsão das propriedades mecânicas na laminação a quente de perfis estruturais

• Ano de defesa: 2007
• Autor(a) principal: Emanuelle Garcia Reis
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: Fenômenos de amaciamento e modelo matemático; Laminação de perfis estruturais; Engenharia metalúrgica; Metalurgia física; Engenharia de minas; Laminação (Metalurgia); Modelos matematicos
• Link de acesso: http://hdl.handle.net/1843/MAPO-7R5P8G

Thermomechanical parameters have great influence on the kinetics of softening in steels and, consequently, on the grain morphology and sizes during and after deformation. Static and dynamic grain refining mechanisms acting during hot rolling vary as a function of rolling temperature, the applied deformation, the interpass times and chemical compositions. The goal of this work was to built a mathematical modelvia Excel type spreadsheet able to predict microstructure evolution and, consequently, to predict mechanical properties of a structure shape after hot rolling in an industry plant. Initially, characterization of the forming process for a given product was carried out taking into account the main process variables such as strain, strain rate, temperature and interpass times, among others. Then, industry trials were performed to obtain aentry data set to feed the mathematical model. Finally, the model was validated by comparing its predictions with results obtained directly from industry runs.