Process for manufacturing semi-finished products from sintered refractory metal alloys
US5102474A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1990 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | Sep 1, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F3/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In a process for manufacturing semi-finished products from sintered refractory metal alloys with a stacked microstructure, the sinter feed reshaped by at least 85% is subjected prior to recrystallization annealing to an intermediate annealing for at least 20 minutes at a temperature not less than 700.degree. C. and not greater than that at which no further recrystallization occurs. Following this intermediate annealing, the hot feed is deformed by a further 3% to 30%. The process makes it possible to manufacture semi-finished products with a good stacked microstructure and of substantially greater dimensions, or of the same dimensions and a substantially better stacked microstructure, than can be obtained with known manufacturing processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.