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Article

Influence of Sample Mass and Pouring Temperature on the Effectiveness of Thermal Analysis for Estimating Gray Iron Inoculation Potential

by
Raymundo del Campo-Castro
,
Manuel Castro-Román
*,
Edgar-Ivan Castro-Cedeno
and
Martín Herrera-Trejo
Ingeniería Metalúrgica, Cinvestav Unidad Saltillo. Av. Industria Metalúrgica 1062, Parque Industrial Saltillo-Ramos Arizpe, Ramos Arizpe 25900, Coahuila C.P., Mexico
*
Author to whom correspondence should be addressed.
Materials 2025, 18(15), 3640; https://doi.org/10.3390/ma18153640 (registering DOI)
Submission received: 24 June 2025 / Revised: 16 July 2025 / Accepted: 21 July 2025 / Published: 2 August 2025

Abstract

Thermal analysis (TA) has been a valuable tool for controlling the carbon equivalent (CE) of cast irons. Additionally, this technique can provide enhanced control over melt quality, allowing for the avoidance of defects such as undesirable graphite morphology and the formation of carbides. To obtain the most valuable information from the TA, it is necessary to minimize the variations in the filling operation of the TA cups. However, the mass and pouring temperature of TA cups can vary in TA’s typical foundry operations. A design of experiments was performed to determine whether specific parameters of cooling curves used for quality control can distinguish the inoculation effect in the melt when the mass and the pouring temperature of TA cups are varied. The minimum temperature of the eutectic arrest proved to be a robust inoculation potential control parameter when variations in the cup’s mass were within a range of 268–390 g and were filled at any pouring temperature between 1235 and 1369 °C. Lighter cups under 268 g and poured at a low temperature are not suitable for controlling inoculation potential by TA; however, they remain helpful in controlling CE. These later cups are related to cooling times of less than 180 s, which can serve as a criterion for discarding unsuitable samples. A bimodal population of cell surfaces was revealed in the samples, with the population of small cells being proportionally more numerous in samples with lower TEmin values.
Keywords: thermal analysis; inoculation potential; melt quality; cast irons thermal analysis; inoculation potential; melt quality; cast irons

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MDPI and ACS Style

del Campo-Castro, R.; Castro-Román, M.; Castro-Cedeno, E.-I.; Herrera-Trejo, M. Influence of Sample Mass and Pouring Temperature on the Effectiveness of Thermal Analysis for Estimating Gray Iron Inoculation Potential. Materials 2025, 18, 3640. https://doi.org/10.3390/ma18153640

AMA Style

del Campo-Castro R, Castro-Román M, Castro-Cedeno E-I, Herrera-Trejo M. Influence of Sample Mass and Pouring Temperature on the Effectiveness of Thermal Analysis for Estimating Gray Iron Inoculation Potential. Materials. 2025; 18(15):3640. https://doi.org/10.3390/ma18153640

Chicago/Turabian Style

del Campo-Castro, Raymundo, Manuel Castro-Román, Edgar-Ivan Castro-Cedeno, and Martín Herrera-Trejo. 2025. "Influence of Sample Mass and Pouring Temperature on the Effectiveness of Thermal Analysis for Estimating Gray Iron Inoculation Potential" Materials 18, no. 15: 3640. https://doi.org/10.3390/ma18153640

APA Style

del Campo-Castro, R., Castro-Román, M., Castro-Cedeno, E.-I., & Herrera-Trejo, M. (2025). Influence of Sample Mass and Pouring Temperature on the Effectiveness of Thermal Analysis for Estimating Gray Iron Inoculation Potential. Materials, 18(15), 3640. https://doi.org/10.3390/ma18153640

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