The development of steels for special-purpose parts such as turbine an
d turbogenerator rotors and back-up rolls of thick-sheet mills is usua
lly based on the Cr - Ni - Mo - V system. Such steels combine high str
ength and plastic properties with satisfactory toughness and brittle s
trength. Rotors are produced from ingots with a mass of up to 400 tons
, in which carbon is known to undergo zonal segregation, Therefore, th
e investigation of the effect of carbon on the structure and propertie
s of Cr - Ni - Mo - V steels is of practical interest.