ESR Hollows molten metal/slag interface detection
US4433242A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1981 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Aug 20, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D2/001
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An improved system for detecting the location of a molten metal/slag interface during the casting of electroslag remelted hollows is provided. The system includes a gamma ray radiation source (30) and a scintillation counter (40). The source (30) and counter (40) reside outside the casting crucible (1) and are held in fixed spatial relationships with respect to one another and with respect to the mandrel (10). The radiation from the source (30) is directed through the crucible (1) and through the annular casting zone (9) defined between the sidewalls of the upwardly driven mandrel (10) and the crucible (1). The counter (40) provides an electrical signal responsive to the rate of radiation events detected thereby.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.