Sand casting offers founders – compared with other casting procedures – the greatest range of structuring options. This also requires high demands on the metallurgy due to the slow solidification rate.
The treatment of the alloys used in the sand casting is carried out for:
Cleaning of non-metallic impurities and inclusions as
well as to reduce the proportion of metal in the dross.
Modification to achieve higher strength and extension values in the casting part.
Grain refining to improve the feeding behaviour and prevent the formation of pores, shrinkage cavities, sinks and gas permeability.