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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