Method of producing a castable high temperature aluminum alloy by controlled solidification
US7854252B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2009 |
| Grant date | Dec 21, 2010 |
| Priority date | — |
| Expiry date | Jul 30, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D30/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A castable high temperature aluminum alloy is cast by controlled solidification that combines composition design and solidification rate control to synergistically enhance the performance and versatility of the castable aluminum alloy for a wide range of elevated temperature applications. In one example, the aluminum alloy contains by weight approximately 1.0-20.0% of rare earth elements that contribute to the elevated temperature strength by forming a dispersion of insoluble particles via a eutectic microstructure. The aluminum alloy also includes approximately 0.1 to 15% by weight of minor alloy elements. Controlled solidification improves microstructural uniformity and refinement and provides the optimum structure and properties for the specific casting condition. The molten aluminum alloy is poured into an investment casing shell and lowered into a quenchant at a controlled rate. The molten aluminum alloy cools from the bottom of the investment casting shell upwardly to uniformly and quickly cool the aluminum alloy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.