Application of high strength titanium alloys in last stage turbine buckets having longer vane lengths
US7195455B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2004 |
| Grant date | Mar 27, 2007 |
| Priority date | — |
| Expiry date | Dec 19, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A new high-strength titanium-based alloy bucket specifically suited for use as the last stage buckets in steam turbine engines having vane lengths of about 40 inches or greater and the method for forming such bucket. Exemplary buckets according to the invention are formed from a titanium-based alloy containing up to about 6.25% aluminum; (b) about to 3.5% vanadium; (c) about 2.25% tin, (d) about 2.25% zirconium, (e) about 1.75% molybdenum, (f) about 2.25% chromium, (g) about 0.7% silicon; and (h) about 2.3% iron, with the balance being titanium. After forming, the bucket can be heat treated to provide stress relief and then machined in a conventional manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.