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5. Optimizing manufacturing costs
5.1 Casting spheroidal graphite cast irons
Spheroidal graphite cast iron is generally cast in a sand mold (except for pipe centrifuging, which uses a cylindrical metal mold). Casting in a sand mold enables complex shapes to be obtained, which in turn enables operating stresses to be distributed more evenly. These complex shapes enable several functions to be combined in a single part.
To obtain a sound part, there are only two constraints: the rigidity and surface hardness of the mold cavity during solidification of the cast iron. The eutectic of austenite and spheroidal graphite solidifies over a wide temperature range. The formation of graphite is accompanied by an increase in volume, which is not counteracted by the still-pasty solidifying layer. This layer...
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Optimizing manufacturing costs
Conclusion
Bibliography
Websites
Fontes Moulées Information Center :
Syndicat des Fondeurs de France :
Association Technique de Fonderie :
...Standards and norms
- Microstructure of cast irons – Part 1: graphite classification by visual analysis. - NF EN ISO 945-1 - (mai 2009)
- Foundry – Classification and designation of raw fonts: symbolic and numerical designation. - NF EN 10-001 -
- Foundry – Cast iron designation system – Symbolic and numerical designation. - NF EN 1560 - (avril 2011)
- Foundry – Spheroidal graphite cast iron. - NF EN 1563 - (février 2012) ...
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Éditions Techniques de Fonderie (ETIF), 44 avenue de la Division Leclerc, 92318 Sèvres Cedex.
Center des Matériaux UMR CNRS 7633, Mines ParisTech, BP 87, 91003 Evry Cedex.
Laboratoire Procédés et Ingénierie en Mécanique et Matériaux, UMR CNRS 8006, Arts et Métiers ParisTech, 151 bd de...
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