Thermal measuring and testing – Transformation point determination – By thermal arrest
Patent
1995-11-02
1998-02-24
Dombroske, George M.
Thermal measuring and testing
Transformation point determination
By thermal arrest
G01N 2502
Patent
active
057205531
ABSTRACT:
A process of determining carbon content silicon content and carbon equivalent of molten iron includes immersion into the molten iron of an analysis device having a mold chamber with a temperature measuring device extending into the chamber. The temperature measuring device is operatively connected to a device for continuously monitoring and recording the temperature. The mold chamber is provided with at least one inner wall of a metal which serves as a heat sink for molten metal introduced into the mold chamber. A layer of thermally insulating material surrounds the mold whereby heat transfer from molten metal into the chamber is minimized. The mold, after dipping is removed into the ambient environment. The temperature of the sample is continuously measured as it cools. The rate of cooling is continually computed and the derived rate of cooling curve is used to identify parameters of the sample from analysis of the rate of cooling over a period of time. Thus, values are determined for the carbon content, silicon content, and carbon equivalent and estimated nodularity count of the molten metal.
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Dombroske George M.
Midwest Instrument Co., Inc.
Oen William L.
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