| 摘要 |
<p>PROBLEM TO BE SOLVED: To realize both reduction of SCC sensitivity of stage blades including a low pressure final stage L-0 and a higher pressure stage L-1 and improvement of LCF life.SOLUTION: The steam turbine rotor of this invention is a steam turbine rotor formed by connecting through welding a rotor disk of a low pressure final stage L-0 with rotor disks of several stages including L-1 stage positioned at a higher pressure than the low pressure final stage L-0. A material of the rotor disk of the low pressure final stage L-0 and material of rotor disks of several stages including L-1 stage are 12Cr steel and a tensile strength of the rotor disk material is 900 to 1200 MPa.</p> |
