| US 7,556,866 B2 | ||
| Vapour turbine | ||
| Carlo Cortese, Prato (Italy); Eugenio Giorni, Florence (Italy); Paolo Bendinelli, Quattro Strade di Lavaiano-Lari (Italy); Marco De Iaco, Florence (Italy); and Vincenzo Vecchiarino, Florence (Italy) | ||
| Assigned to Nuovo Pignone S.p.A., Florence (Italy) | ||
| Filed on Dec. 20, 2005, as Appl. No. 11/311,408. | ||
| Claims priority of application No. MI2004A2482 (IT), filed on Dec. 23, 2004. | ||
| Prior Publication US 2006/0140752 A1, Jun. 29, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. F03B 3/12 (2006.01) | ||
| U.S. Cl. 428—680 [428/666; 416/241 R; 60/641.2] | 2 Claims |
| 1. A vapour turbine operating with geothermal vapours containing corrosive agents including chlorides and/or sulfides wherein said turbine comprises a series of sealing laminas made of a nickel-chromium-molybdenum (NCM) alloy containing a quantity of nickel ranging from 54% to 58% by weight of said NCM alloy, a quantity of chromium ranging from 21% to 23% by weight of said NCM alloy, and a quantity of molybdenum ranging from 12% to 14.5% by weight of said NCM alloy wherein said turbine further comprises a series of rotor blades made of a nickel-chromium-molybdenum-niobium (NCMN) alloy said NCMN alloy comprising a quantity of nickel ranging from 55% to 59% by weight of said NCMN alloy, a quantity of chromium ranging from 19% to 22.5% by weight of said NCMN alloy, a quantity of molybdenum ranging from 7.0% to 9.5% by weight of said NCMN alloy, a quantity of niobium ranging from 2.75% to 4% by weight of said NCMN alloy. |