Abstract

GOMEZ, G.R.  and  PEREZ, T.. Modelling the microstructural evolution during hot rolling. Lat. Am. appl. res. [online]. 2002, vol.32, n.3, pp. 253-256. ISSN 0327-0793.

A metallurgical model that describes the microstructural evolution of C-Mn steels in the hot strip mill, and that predicts the yield strength and the ultimate tensile strength based on the steel chemistry and the processing conditions is presented. The model comprises the microstructural evolution during hot deformation in the austenitic range (taking into account the effects recrystallization and grain growth), and the austenite decomposition during cooling (formation of ferrite, perlite and/or bainite). A comparison between calculated and measured yield strength and ultimate tensile strength values for several steels and processing conditions is also included.

Keywords : hot rolling; recrystallization; grain growth; phase transformation.