Steam turbine power generation system and low-pressure turbine rotor
US7192247B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2005 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Nov 21, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C1/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A steam turbine power generation system, comprising a high-pressure turbine, an intermediate-pressure turbine and a low-pressure turbine, wherein the intermediate-pressure turbine has an inlet steam temperature of 650–720° C., and the low-pressure turbine has an inlet steam temperature of 410–430° C.; and a low-pressure turbine rotor of the low-pressure turbine is made of a heat-resisting steel which contains, in weight percent, C: 0.28 or less, Si: 0.03 or less, Mn: 0.05 or less, Cr: 1.5 to 2.0, V: 0.07 to 0.15, Mo: 0.25 to 0.5, Ni: 3.25 to 4.0, and the balance of Fe, unavoidable impurities and unavoidable gases, and the unavoidable impurities contain, in weight percent, P: 0.004 or less, S: 0.002 or less, Sn: 0.01 or less, As: 0.008 or less, Sb: 0.005 or less, Al: 0.008 or less and Cu: 0.1 or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.