| 摘要 |
A turbine rotor material for geothermal power generation containing C: 0.20 to 0.30 mass %, Si: 0.01 to 0.2 mass %, Mn: 0.5 to 1.5 mass %, Cr: 2.0 to 3.5 mass %, V: more than 0.15 mass % and 0.35 mass % or less, predetermined amounts of Ni and Mo, and a remainder consisting of Fe and inevitable impurities, the Ni made to be more than 0 and 0.25 mass % or less, the Mo made to be 1.05 to 1.5 mass %. Even a body diameter of 1600 mm or more can thereby be quenched, enabling provision of a turbine rotor material for geothermal power generation less prone to stress corrosion cracking even in a hydrogen sulfide environment and a method for producing the same. |
