METHOD OF CASTING CAST IRON ROLLS WITH VERMICULAR GRAPHITE

摘要

The invention relates to ferrous metallurgy, in particular to the method of casting cast iron rolls with vermicular graphite. A method of casting rolls of cast iron with vermicular graphite includes primary modification in the casting ladle by a complex modifier based on rare earth elements in an amount of 0.5-0.7 wt. %, and secondary modification is performed on a jet of cast iron at filling of a mould with cast iron with ferrosilicon, with its mass flow rate of 0.2-0.4 wt. %. The invention increases the thermal conductivity by two times, thermal stability by 25 %, strength by 5 % and increase of the depth of transition area of rolls from 3 to .