Method for producing workpieces made of cast iron, and hollow castings produced accordingly

摘要

The invention relates to a method for producing hollow workpieces made of cast iron. The invention is characterised in that, when the melt is poured into the casting mould, alloy elements from the coating (dressing) diffuse into the solidifying melt at locally delimited sections of the core surface, which alloy elements increase the growth rate, as do S and O2, of the graphite crystals parallel to the base plane or, like Mg, Te, Se, slow it down or stop it altogether. <IMAGE>