Nucleated casting systems and methods comprising the addition of powders to a casting
US6460595B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2000 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Feb 23, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D23/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Nucleated casting systems and methods comprise the addition of powders into a liquidus portion of the casting. The casting system forms a casting comprising a liquidus portion that receives the refined liquid metal and a solidified portion, the casting further comprising a fine-grain, homogeneous microstructure that is essentially oxide- and sulfide-free and segregation defect free. The casting system comprises a source of refined liquid metal, the refined liquid metal having oxides and sulfides refined out of the metal; a solid metal particle addition system that adds solid metal particles to a surface of the liquidus portion of the casting; and a nucleated casting system for forming the casting. The solid metal particle addition system adds solid metal particles that serve as nucleation centers during solidification of the casting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.