Deere & Company

Ann E Schoenjahn

Maurice P Roach

Larry G Carmack

A new, accurate method for the determination of percent total carbon in a molten hypoeutectic or hypereutectic iron is disclosed. It has been found that percent total carbon content of a molten iron is related to a straight-line function of the difference in liquidus and eutectoid transformation (i.e., austenite to pearlite) temperatures of the iron. A standard liquidus - eutectoid transformation temperature difference (based on total carbon content) is generated. A molten iron sample is cooled through the eutectoid transformation temperature and the difference in the liquidus and eutectoid transformation temperatures is compared with the standard liquidus-eutectoid transformation temperature difference to determine the percent total carbon of the sample.

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Waterloo, IA, United States of America

Ann E Schoenjahn