Powder-metallurgical process for the production of a green pressed article of high strength and of low relative density from a heat resistant aluminum alloy
US4758405A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1987 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Aug 12, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C1/0416
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A green pressed article of high strength and of low relative density, formed from a heat-resistant aluminum alloy of the Al/Fe/X or Al/Cr/X type, where X is Ti, Ce, Zr, Hf, V, Nb, Cr, Mo or W, is produced by a powder-metallurgical process, wherein an alloy melt is atomized to form fine particles by means of an inert gas jet, with which 0.5 to 2% by volume of oxygen is admixed, and the powder produced in this manner is compactd. Nitrogen, argon or helium can be employed as inert gas. The green pressed article is preferably formed from a small proportion of coarser, non-spherical particles and a greater proportion of finer, spherical particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.