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Título del libro: Metal 2010 - 19th International Conference On Metallurgy And Materials, Conference Proceedings
Título del capítulo: Applied pressure control risering of a ductile iron sand casting

Autores UNAM:
CLAUDIA FLORES VARGAS; EUDOXIO ALBERTO RAMOS GOMEZ; MARCO AURELIO RAMIREZ ARGAEZ; CARLOS GONZALEZ RIVERA;

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Autores externos:

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Idioma:
Inglés

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Año de publicación:
2010

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Palabras clave:

Alloys; Defects; Ductility; Gating and feeding; Iron; Molds; Pressure control; Shrinkage; Silicon; Solidification; Different geometry; Experimental trials; Induction furnace; Pouring temperatures; Process condition; Risering; Sandwich methods; Shrinkage defects; Casting

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Resumen:

Experimental trials were carried out using a green sand mold test casting for ductile iron (DI) designed according to pressure control risering method (PCR). The system is composed by a gating system connected to a blind riser feeding a cubic casting through a rectangular neck. The system was used to explore the effect of pouring temperature and C and Si content on the production of castings free of shrinkage defects. An induction furnace was used to prepare DI liquid alloys from the same base metal and the burdens were adjusted in order to obtain melts with selected C and Si content allowing the production nearly eutectic alloys with different C/Si content ratios. The sandwich method was used for the nodulization treatment and inoculation and post-inoculation were used in all cases. The alloys were cast into the test molds using two different pouring temperatures. The castings were macrographically analyzed in order to detect the presence of shrinkage defects. Results suggest that control of pouring temperature and C/Si ratio is necessary to avoid presence of shrinkage defects. Process conditions and PCR system design and dimensions obtained from the test casting were applied to castings of different geometries and similar solidification modulus. Results shows that the test casting and methodology proposed in this work can provide useful information to smooth the progress of on-line implementation of successful gating/risering PCR systems. © 2010 TANGER Ltd., Ostrava.

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Entidades citadas de la UNAM:

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Fuente:


ISBN:
9788087294178
Editorial:
TANGER Ltd.

Tipo de producto:
Conference Paper