COMPUTER-AIDED DUCTILE IRON COOLING CURVE ANALYSIS

L. Zemcík, J. Cech, P. Krhounek

Abstract

The structure and mechanical properties of cast alloys are closely related to the metallurgical and technological parameters of the production process. Mathematical models enabling the prediction of the structure and mechanical properties of cast alloys employ computer-aided analysis of the cooling curves scanned. The paper summarizes the results of research work aimed at obtaining data files recording the temperature waveform during the solidification of the specimens cast. The temperatures were recorded by means of type K thermocouples, and a DaqBook 100 analog to digital converter with the DBK 19 thermocouple card and DaqView 7.0 software were used to digitize the signal. The cooling curves obtained from experimental melts were analyzed in the Mathcad 7 Professional program environment, in which the modelling of the appearance of the primary (pouring) structure was also performed. In conclusion the structures predicted by mathematical models are compared with specimen structures evaluated by methods of stereometric metallography.

Keywords

computer-aided cooling curve analysis, ductile iron

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IMEKO-WC-2000-TC12-P326.pdf

DOI

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IMEKO TC

TC12 - Temperature and Thermal Measurements

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