| 摘要 |
PROBLEM TO BE SOLVED: To obtain a low pressure turbine rotor, manufacturing method for the same, and a steam turbine applied with the turbine rotor, such that the turbine rotor can accommodate a severer environment, that is, an increase of centrifugal force generated where the steam turbine is elongated at both terminal stages thereof. SOLUTION: A low pressure turbine rotor 1 is composed of a rotor barrel portion C, bearing portions A, E connected with both ends of the rotor barrel portion C, and terminal stage barrel portions B, D at both terminal stages of the rotor barrel portion C. At least two component materials comprising different chemical compositions are employed for the rotor barrel portion C, bearing portions A, E, and terminal stage barrel portions B, D. Those component materials are integrally connected by means of electroslag remelting, welding, bolt clamping, or combinations of two or more kinds of these.
|
