Metal alloy mass for forming in the semisolid state
US5980660A · kind A · utility
2Cited by
2References
10Claims
0Family size
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Key dates
| Filing date | Feb 3, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Feb 3, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D1/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A metal alloy mass of a defined porosity for forming in the semi-solid state. When the porosity is measured by cooling in ambient air from a temperature corresponding to a liquid fraction ratio between 30 and 70% to the ambient temperature, the mass has a porosity ratio, measured by image analysis, between 2 and 20%, and preferably between 3 and 8%. Alternatively, when the gassing level is measured by a solidification test under 80 hPa, the mass has a volumetric porosity ratio between 3 and 50% and preferably between 4 and 25%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.