ESR Hollows molten metal/slag interface detection

Details ESR Hollows molten metal/slag interface detection ESR Hollows molten metal/slag interface detection

1981-08-20

1984-02-21

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

With means to inspect passive solid objects

250363R, 378 52, G01N 2300, G01T 120

Patent

active

044332424

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.

REFERENCES:
patent: 3590777 (1971-07-01), Elam et al.
patent: 3668386 (1972-06-01), Blecherman et al.

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