Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1994-09-27
1995-09-12
Noland, Thomas P.
Measuring and testing
Sampler, sample handling, etc.
Capture device
7386459, G01N 112
Patent
active
054489237
ABSTRACT:
A chill mold sampler for molten metal, capable of taking pin samples or flat disc samples or both, has one or more high melting point quartz glass intake tubes, each with a portal end closed by a thin metal slag cover cemented in place, blocking the entry portal during the plunging sampling immersion of the sampler into the melt. Two or more paper covers cemented over the outside of the metal slag cover provide explosive deflection of slag during the plunging entry of the sampler into the molten metal. A narrow scored groove or slit formed at least partway across the face of the metal slag cover permits rapid melting of the metal cover at low temperatures, just at or above the "liquidus" or freezing temperature of the melt, immediately after passage of the sampler through the hot slag layer, achieving successful sampling of fully deoxidized or "dead" killed steels. For very low carbon steel melts, thin metal slag covers of comparable very low carbon steel produce accurate samples, and avoid introducing undesired carbon to the samples. For unkilled steel, low temperature melt sampling can be achieved by enclosing a few helical turns of a coil of de-oxidant wire between the intake portal and its thin grooved or slit metal slag cover.
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Haly Inc.
Noland Thomas P.
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