On-line production control of cast irons by measuring the surface tension of the base treated iron
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United States of America Patent
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Apr 6, 1999
Grant Date -
N/A
app pub date -
Nov 28, 1997
filing date -
May 29, 1995
priority date (Note) -
Expired
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Abstract
The surface tension of a sample quantity of molten iron from a batch of molten iron is determined and compared with the surface tension of the sample with the surface tensions of batches of molten iron that are known to solidify as respective different forms of cast iron. The surface tension of the molten iron sample is determined by adding the sample to a sample cup, submerging a device for introducing a noble gas into the molten iron of the sample, positioning a piezoelectric transducer at the bottom of the sample cup, administrating the noble gas at a constant rate through the device, measuring the temperature of the sample, and monitoring vibrations in the molten iron of the sample by recording signals from the transducer.
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