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The aim of this study was the morphological optimization of graphite by generating knowledge able to determine which metallurgical manufacturing factors have a significant influence on the geometry of the graphite precipitated in spheroidal grey cast irons with a mass coefficient of 4, used in the manufacture of wind turbine hubs. The research study was conducted on an industrial scale applying a fractional Design of Experiments (DoE) with 7 factors, 16 experiments and resolution IV. The following constitute the most noteworthy novel results obtained in the study. The effect of La on the graphite “counts” is strengthened by pre-inoculation of the molten iron bath with SiC. Furthermore, graphite counts can be increased under low carbon equivalent conditions using post-inoculants containing Zr. Finally, high values of Mn lead to a reduction in the size of the precipitated graphite.

Morphological Optimization of Graphite in Spheroidal Cast Iron with a Modulus of 4 cm used in the Manufacture of Wind Turbine Hubs