Method for producing iron metal castings

A method for producing iron metal castings, comprising the steps of:

• inserting an expendable mold having a cavity for holding casting material into an opened multi-part permanent mold,
• closing the multi-part permanent mold,
• filling the cavity of the expendable mold with casting material, wherein a supporting device partially protruding into the cavity of the expendable mold is partially overcast with the casting material,
• cooling the expendable mold in the permanent mold after the filling,
• opening the multi-part permanent mold during the cooling, at the earliest after falling below a liquidus temperature, or after falling below a solidus temperature, or before the casting has reached an eutectoid transformation temperature, and the expendable mold is nondestructively removed from the permanent mold together with the casting,
• further cooling the expendable mold together with the casting while hanging on the supporting device, at least until a microstructure formation of the casting is concluded, and
• demolding the casting by removing the expendable mold.