Estudo comparativo entre aço recozido em caixa e aço recozido no contínuo com alteração do laminador de encruamento

Abstract

The fabrication of sheet metal occurs in several stages, including processes from the cold rolling until to the packaging of the coil. Among the main processes there are some indispensable, which are the processes of annealing and skin-pass. The annealing process it has goal to restore lost ductility of the steel in the cold rolling process, and for that it consists in heating the material at a temperature (recrystallization temperature) and keeping it for a certain period. The annealing temperature and time may vary depending on the applied annealing. For annealing box, there is an increased annealing cycle obtaining materials with a higher ductility are recommended for packaging which requires a more severe forming. For packages that require a less severe conformation, it is used annealing process continue, that despite producing material with lower ductility than the process in box, has a shorter processing time and lower power consumption. The work focuses primarily on the study practice, evaluating the steel behavior with changes in the annealing process in box annealing to continuous annealing. Variations were prepared the skin-pass process between samples produced in the traditional way (dry skin-pass) and produced sample alternative forms (wet skin-pass) evaluating and comparing graphical data mechanical tests combined with mechanical properties and microstructural features.