Production of single phase alloy parts by reduction of oxides
US4236924A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1979 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Jan 12, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F3/001
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In the process of producing metal alloy parts by the reduction of powder metal oxide compacts, it has been discovered that single phase alloy parts may be produced by an agglomerated mixture of metal oxides without a separate annealing step. The metal oxide mixture is formed into agglomerates by spray drying a solution of metal salts which are subsequently decomposed, or other techniques, compacted to the desired shape, and then reduced in a hydrogen atmosphere at high temperature. In the case of alloys that would otherwise segregate, a quenching step follows the reduction of the metal oxide shape. As only oxides are involved prior to reduction, problems with surface oxidation are avoided. A sintering step in air can be used to give the oxide compact structural integrity before reduction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.