11/2017
10.1016/j.msea.2017.11.051
Materials Science and Engineering A 712
Fundición de hierro, I+D+i, Jacques Lacaze, Jon Sertucha, Propiedades mecánicas, Rodolfo González-Martínez, Tecnologías de fundición, Urko de la Torre
In this second part of the investigation, room temperature mechanical properties and hardness evolution of cast irons with silicon contents ranging from 2.29 wt% to 9.12 wt% have been studied and related to structural results from the first part. Increasing silicon content increases ultimate tensile strength and yield stress until a maximum value of 719 MPa at around 5.0−5.2 wt% silicon for the former and 628 MPa at 5.2−5.4 wt% silicon for the latter. Brinell hardness remains increasing with silicon content with a maximum value of 396 at 9.12 wt% silicon. Elongation at rupture shows an opposite evolution and gradually decreases to zero at 5.3 wt% silicon. This evolution is related to chemical ordering of the ferritic matrix (embrittlement effect). Chunky graphite shows apparently no significant effect on the ultimate tensile strength and yield strength in cast irons with silicon contents higher than 4.0 wt%. However, it has a negative effect on elongation. This result contrasts with the negative effect of chunky graphite on mechanical properties of ductile irons reported in the literature for alloys with silicon contents lower than 3 wt%. It is suggested that this difference is due to the matrix strengthening effect of high silicon contents which overtakes the detrimental effect of chunky graphite. This study suggests that cast irons with silicon content as high as 5.0 wt% could be considered for industrial applications when high resistance and some ductility are requested.
Rodolfo González-Martínez (AZTERLAN), Urko de la Torre (AZTERLAN), André Ebel (CIRIMAT), Jacques Lacaze (CIRIMAT), Jon Sertucha (AZTERLAN)
High silicon ductile iron, mechanical properties, chunky graphite.
¿Cómo podemos ayudarte?
Mantente informad@ de la actividad de AZTERLAN
Mantente informad@ de la actividad de AZTERLAN
Formamos equipos de trabajo en distintos ámbitos de la metalurgia y los procesos de transformación de metales.
Indícanos los datos de tu trabajo y nos pondremos en contacto contigo lo antes posible.
Comparte tu reto con nuestro equipo. Hablar no puede más que acercarnos un poco más a posibles soluciones.