Grain refiner for aluminum containing silicon
US5055256A · kind A · utility
12Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1988 |
| Grant date | Oct 8, 1991 |
| Priority date | — |
| Expiry date | Oct 24, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C1/03
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed is an Al-Ti-B master alloy especially designed to grain refine cast aluminum alloys containing silicon. The alloy composition goes contrary to present known art. Present commercial master alloys contain a ratio of Ti to B exceeding 2.2 to promote a mixture of TiB.sub.2 and TiAl.sub.3 crystals. This invention provides an Al-Ti-B alloy wherein the Ti to B ratio is 1. It contains a preponderance of mixed boride crystals. The optimum composition of the alloy of this invention is Al-3Ti-3B.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.