| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotor shaft for a steam turbine, the roter shaft having superior strength of high temperature and long-time side, at the specific temperature of 600°C or more and long-time side of 50,000 hours or longer, and to provide a high-pressure steam turbine, an intermediate-pressure steam turbine and a high/intermediate-pressure steam turbine, which use the rotor shaft, and a steam turbine power plant. <P>SOLUTION: The rotor shaft for the steam turbine uses heat-resistant steel including in weight C: 0.05-0.30%, Si: 0.2% or less, Mn: 0.01-1.5%, Ni: 0.005-0.3%, Cr: 8.5-11.0%, Mo: 0.05-0.5%, W: 1.0-3.0%, V: 0.05-0.30%, Nb: 0.01-0.20%, Co: 0.5-2.5%, Re: 0.01-1.0%, N: 0.01-0.1%, B: 0.001-0.030%, and Al: 0.0005-0.006%, and the remainder including Fe and unavoidable impurities. <P>COPYRIGHT: (C)2013,JPO&INPIT |
