Heavy tungsten-nickel-iron alloys with very high mechanical characteristics and process for the production of said alloys
US4938799A · kind A · utility
7Cited by
4References
3Claims
0Family size
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Key dates
| Filing date | Oct 5, 1988 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Oct 5, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/18
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to heavy tungsten-nickel-iron alloys with high mechanical characteristics and a specific gravity between 15.6 and 18. The alloys include a tungsten .alpha.-phase in the shape of butterfly wings with dislocation cells of dimensions between 0.1 and 1 .mu.m, and a nickel-iron bonding .gamma.-phase having a mean free path of less than 15 .mu.m and an Ni/Fe ratio greater than or equal to 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.