Cyclic overageing heat treatment for ductility and weldability improvement of nickel-based superalloys
US5509980A · kind A · utility
19Cited by
3References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 17, 1994 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Aug 17, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention is directed to a pre-weld overageing heat treatment for nickel-based superalloys, where the alloy is heated to solutionization temperature for a time sufficient to dissolve the gamma prime phase of the alloy microstructure, then slowly cooled with periods of intermittent heating, so that the gamma prime phase reprecipitates as coarse equiaxed particles, and the presence of fine sized gamma prime phase particles is substantially avoided. The present invention is also directed to a welding method wherein said pre-weld overageing treatment is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.