Influencia del contenido de silicio en la cinética de las transformaciones de fases que ocurren dentro del intervalo intercrítico del diagrama Fe-C-Si

A. BASSO; C. REY; J. M. MASSONE

Congreso; SAM/CONAMET 2012 -12 Congreso Binacional de Metalurgia y Materiales; 2012

In this work the feasibility of obtaining ductile iron with Dual Phase structures through heat treatment starting from different types of as-cast microstructures, was studied. These structures were obtained by adding different tenors of silicon (2.4% to 4.2%) to the melt and keeping constant the other alloying elements. The study was focused on the determination of the required time to achieve the percentages of equilibrium phases (ferrite and austenite) for different temperatures into the intercritical interval. The results showed that, as the silicon content increases the required time to reach the thermodynamic equilibrium phases, into the intercritical interval, is markedly reduced. Similarly, for a constant chemical composition, as increases the intercritical austenitized temperature, the time required to reach the equilibrium phase quantities decreases.