Título
Star cracks in continuously cast peritectic steel slabs
Autor
José Jorge Ruiz Mondragon
Nivel de Acceso
Acceso Abierto
Materias
Resumen o descripción
This work consisted of the characterisation of star cracks found on the surface of continuously cast steel slabs solidification experiments on molten steel in Cu moulds, with and without ceramic insulation. Cracks located at the slab surface were propagated through the grain boundaries, with the presence of Cu particles observed along the crack paths. Zones normal to the cracks exhibited an iron oxide layer followed by Cu particles and the steel matrix. Specimens solidified in Cu moulds showed an iron oxide/Cu/steel layer arrangement extending from the sample surface towards the steel matrix, as well as a penetration of Cu through the grain boundaries. In contrast, in samples solidified in ceramic insulated Cu moulds, Cu particles were neither observed at the surface nor at the grain boundaries. Thus, it is thought that the star cracks are due to liquid steel/ Cu mould interaction during casting and that they are formed during primary cooling in the mould in the continuous casting machine and then they propagate during secondary cooling and bending operations. It is also thought that cracking susceptibility is promoted by peritectic transformation which occurs at high solid fractions.
Fecha de publicación
2010
Tipo de publicación
Artículo
Versión de la publicación
Versión publicada
Recurso de información
Formato
application/pdf
Idioma
Español
Audiencia
Estudiantes
Investigadores
Sugerencia de citación
Star cracks in continuously cast peritectic steel slabs M. Herrera-Trejo*1, J. J. Ruiz1, M. Castro-Roman1 and H. Solis2. Ironmaking and Steelmaking 2010 VOL 37 NO 6
Repositorio Orígen
COMIMSA
Descargas
600