Determination of Eutectoid Transformation Temperatures in Ductile Cast Iron

The paper proposes a methodology useful in verification of results of dilatometric tests aimed at determination of temperatures defining the start and the end of eutectoid transformation in the course of ductile cast iron cooling, based on quenching techniques and metallographic examination. For an...

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Bibliographic Details
Published inArchives of foundry engineering Vol. 15; no. 4; pp. 51 - 54
Main Authors Orłowicz, A.W., Trytek, A., Mróz, M., Tupaj, M.
Format Journal Article
LanguageEnglish
Published De Gruyter Open 01.12.2015
Polish Academy of Sciences
Subjects
Cooling rate
Ductile cast iron
Eutectoid transformation
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Summary:The paper proposes a methodology useful in verification of results of dilatometric tests aimed at determination of temperatures defining the start and the end of eutectoid transformation in the course of ductile cast iron cooling, based on quenching techniques and metallographic examination. For an industrial melt of ductile cast iron, the effect of the rate of cooling after austenitization at temperature 900°C carried out for 30 minutes on temperatures TAr and TAr was determined. The heating rates applied in the study were the same as the cooling rates and equaled 30, 60, 90, 150, and 300°C/h. It has been found that with increasing cooling rate, values of temperatures TAr and TAr decrease by several dozen degrees.
ISSN:2299-2944
2299-2944
DOI:10.1515/afe-2015-0078