Abstract

CALVO, J; CABRERA, J. M  and  PRADO, J. M. Ductility at high temperature of a medium carbon steel. Rev. Fac. Ing. UCV [online]. 2005, vol.20, n.1, pp.33-38. ISSN 0798-4065.

The hot ductility and fracture behaviour of a C-Mn steel susceptible to transversal cracking in the corners is studied. In order to evaluate the influence of residual elements and inclusions, this steel was compared with another one with the same main composition obtained by electro-slag from almost pure iron. Tensile tests at temperatures ranging from 1000ºC to 650ºC and an initial strain rate of 1·10^-3s^-1 were carried out for reheated samples of both steels. The reduction in area of the samples tested to fracture was used as a measure of the hot ductility. For each temperature, the ductility behaviour was related both to the phases and to the fracture mechanisms present. For this purpose, the fracture surfaces of the tensile specimens were examined by scanning electron microscopy.

Keywords : Hot ductility; steel.