Weld repairable combustor
US5086968A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1990 |
| Grant date | Feb 11, 1992 |
| Priority date | — |
| Expiry date | Jan 26, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49318
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Combustors of gas turbine engines in which components are brazed to the combustor are not easily repairable by conventional welding because the brazed joint includes a melting point depressant which may not only cause the joint to be brittle but also the melting point of the joint to be near or below the temperatures required for welding. These problems are solved by a relatively simple and inexpensive process for producing a weld repairable combustor which includes using a brazing powder mix comprising a metal powder compatible with the metals of the combustor and the article to be brazed to the combustor, and suitable melting point depressant in powder form, heating the brazing powder mix to a first temperature sufficient to cause the brazing powder mix to become molten, and finally heating the brazing powder mix at a second temperature for a sufficient time to cause the melting point depressant to substantially diffuse away from the brazed area. The resulting combustor formed by this process can be repaired by welding when cracks or other discontinuities requiring a weld repair are situated near or at the brazed joint, and this process avoids the expensive requirement of redesig…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.