Patent ID: 6546713
Filing Date: 2003-04-15
Classification: C22C,Y02E

Abstract:
A gas turbine for power generation, including a compressor, a combustor, at least three stages of turbine blades fixed to turbine disks, and at least three stages of turbine nozzles corresponding to said stages of turbine blades, characterized in thatsaid gas turbine has a steam cooling line for cooling said turbine disks by flowing steam from a center of rotation axis of said turbine disks to an inside of each of said turbine blades on first and second stages of said turbine blades and inside of each of said nozzles on a first stage of said turbine nozzles; and said turbine disks on all the stages are made of a martensite steel by weight of 0.05-0.20% of C, 0.15% or less of Si, 0.20% or less of Mn, 0.50-3.0% of Ni, 8.0-13.0% of Cr, 1.0-4.0% of Mo, 0.10-0.40% of V, 0.01-0.20% of Nb, 1.0-5.0% of Co, and 0.025-0.125% of N.