Thermomechanical processing of aluminum alloys
US8163113B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 31, 2009 |
| Grant date | Apr 24, 2012 |
| Priority date | — |
| Expiry date | Aug 8, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C21/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cast aluminum alloy containing up to about 0.35% by weight chromium is heated to a first elevated temperature to homogenize the casting and dissolve the chromium content in an aluminum-based matrix phase. The alloy is then heated at a lower elevated temperature to cause the precipitation of a portion of the chromium as an aluminum-containing and chromium-containing intermetallic compound. A suitable amount of chromium is retained in solid solution in aluminum. Thus, the concentration of dissolved chromium in an aluminum alloy may be controlled to fall within specified ranges which result in improvements in both the strength and ductility of the alloy. Impurity amounts of iron may also be precipitated as intermetallic particles from the aluminum matrix to enhance the ductility of the aluminum-based alloy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.