Water-turbine runner and process for manufacturing the same
US5035579A · kind A · utility
24Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1989 |
| Grant date | Jul 30, 1991 |
| Priority date | — |
| Expiry date | Nov 15, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49336
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A water turbine runner has a plurality of vanes, each made of a rolled steel plates which contains, by weight, 0.01 to 0.10% of C, 0.10 to 1.0% of Si, 0.10 to 2% of Mn, 2 to 7% of Ni, 10 to 15% of Cr and 0.10 to 4% of Mo, 71.9 to 87.7% of Fe, and which has a metallic structure mixture containing, by volume, martensite and 10 to 35% of residual austenite. Each of the vanes is made of a plurality of plate pieces, cut out from the rolled steel plate, press-formed in a shape of a part of the vane and joined by welding into the complete vane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.