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Pearlite
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Proceedings Papers
María Isabel Bucio-Herrejón, Monserrat Sofía López-Cornejo, Héctor Javier Vergara-Hernández, Angel Daniel Rauda-Ceja
HT2023, Heat Treat 2023: Proceedings from the 32nd Heat Treating Society Conference and Exposition, 17-22, October 17–19, 2023,
Abstract
View Papertitled, Effect of Cooling Rates in a Hypoeutectoid Steel Under Forced Convection Conditions
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for content titled, Effect of Cooling Rates in a Hypoeutectoid Steel Under Forced Convection Conditions
A physical model was developed to estimate the thermal history in hypoeutectoid steel under continuous cooling and forced convection conditions. The thermal histories were acquired at different cooling rates to emulate the forced-convection conditions in a controlled cooling conveyor and compared in every cooling condition with the microstructural evolution of the pearlite. Through Scanning Electron Microscopy (SEM) the pearlite interlamellar spacing was determined, as well as Vickers hardness and tensile tests, validated the effect of the cooling rate on microstructural parameters such as transformation temperature and pearlite interlamellar spacing. It was found that air velocity increased the undercooling rate and decreased the pearlite interlamellar spacing.
Proceedings Papers
Monserrat Sofía López-Cornejo, Héctor Javier Vergara-Hernández, Pedro Garnica-González, Octavio Vázquez-Gómez, Sixtos Antonio Arreola-Villa
HT 2019, Heat Treat 2019: Proceedings from the 30th Heat Treating Society Conference and Exposition, 123-128, October 15–17, 2019,
Abstract
View Papertitled, Pearlite Spheroidization and Its Relationship with Tensile Strength in Hypoeutectoid Steels
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for content titled, Pearlite Spheroidization and Its Relationship with Tensile Strength in Hypoeutectoid Steels
A hypoeutectoid steel was austenitized at 840 °C for one hour and cooled at two rates. Examination by optical and scanning electron microscopy showed a change in the pearlite microstructure. Cooling in air as compared to furnace cooling reduced the pearlite interlamellar spacing and increased the hardness. The slower cooling resulted in a lower tensile strength, higher tensile elongation, and different fracture appearance.
