Casting process for aluminum alloys
US8302657B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2010 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | Jun 23, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D11/117
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A casting process for an aluminum alloy containing at least about 0.1% of Mg and/or at least about 0.1% of Li in which a liquid surface of the alloy is put into contact with a dried gas including at least about 2% of oxygen by volume and with a water partial pressure lower than about 150 Pa throughout most of the solidification process is described. The process makes it possible to cast most oxidable aluminum alloys, in particular aluminum alloys containing magnesium and/or lithium, without using additives such as beryllium and/or calcium and without using expensive devices and/or gases, to obtain cast ingots generally free from surface defects and pollution, in complete safety.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.