The cast iron foundryman is constantly aware of factors affecting the chilling tendency of cast irons, i.e. the capability of the iron to solidify within a given casting in a manner such that carbides form either at edges, in thin sections or along the casting centerline. Even though typical practices in the foundry are based on the control of charge materials, melting and melt handling practices, inoculation materials and techniques, pouring practices and gating systems, etc., to minimize chill formation, it is not uncommon for a foundry to be besieged by an unexpected onset of carbide formation. This research presents a procedure that will accurately document the chilling tendency of a molten cast iron using thermal analysis technology and appropriate statistical handling of the data.
展开▼
