Grain refiner for aluminum containing silicon
US5180447A · kind A · utility
9Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1990 |
| Grant date | Jan 19, 1993 |
| Priority date | — |
| Expiry date | Aug 24, 2010 |
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 commerical 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.