Method of alloying aluminium
US4832911A · kind A · utility
4Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1987 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Sep 16, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C1/026
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Aluminium is alloyed by adding alloying ingredients to the molten metal in an intermediate treatment vessel or ladle rather than as at present in a casting furnace. If several ladles are used to supply the casting furnace, the alloying ingredients may be added to some but not all of them. A preferred order of addition of alloying ingredients is: (i) AlF.sub.3 to reduce unwanted Na, Ca and Li; (ii) one or more of Mn, Fe, Cr, Ni, Cu, Zn and Si in powder form; (iii) one or more of Zn, Cu and Si in massive form; (iv) Mg. A ladle/impeller design is described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.