HEAT RESISTANT STEEL, ROTOR SHAFT FOR STEAM TURBINE AND STEAM TURBINE USING THE SAME, AND STEAM TURBINE POWER GENERATING PLANT

摘要

An object of the present invention is to provide a superior heat resistant steel for steam turbine using the same and the rotor shaft, and a steam turbine and steam-turbine power plant for high-temperature strength and cut-out strength. ; The present invention by weight, C 0.15 to 0.40%, Si 0.5% or less, Mn 0.05 to 0.50%, Ni 0.5 to 1.5%, Cr 0.8 to 1.5%, Mo 0.8 to 1.8% and V 0.05 to 0.35% to contain and, It has a heat resistant steel which comprises a ratio of 3.0 to 10.0 Cr-Mo-V low alloy steel of the (Ni / Mn). ; For steam turbine rotor shaft, the bearings, shaft seal, nozzle boxes, the blade