About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Phase Transformations and Microstructural Evolution
|
Presentation Title |
Effect of Rapid Tempering Thermal Parameters by Joule Heating on the Microhardness in a Medium-carbon Low-alloy Cr-Mo Steel |
Author(s) |
Perla Guadalupe Díaz-Villaseñor, Ricardo Guzman-Garfias, Octavio Vázquez-Gómez, Héctor Javier Vergara-Hernández, Martín Herrejón-Escutia, Gerardo Marx Chávez-Campos |
On-Site Speaker (Planned) |
Ricardo Guzman-Garfias |
Abstract Scope |
The effect of the initial microstructure and rapid tempering thermal parameters on the microhardness profiles were studied by Joule heating in a Cr-Mo low-alloy medium-carbon steel. The specimens were conditioned to obtain two types of microstructures throughout thin-cylindrical test pieces: 1) martensite and 2) a mixture of polygonal-acicular ferrite. The specimens were subjected to different rapid quenching-tempering and tempering cycles at 525 and 575 ºC with short times (1, 10, and 100 s) at a heating rate of 50 ºC s-1. The specimens were analyzed by optical and scanning electron microscopy and Vickers microhardness measurements to demonstrate the gradient of microstructures and microhardness before and after the treatments. The results show an apparent increase and decrease of the microhardness throughout the specimens, evidencing the effect of the rapid tempering conditions, which was possible even at very short treatment times. |
Proceedings Inclusion? |
Planned: |
Keywords |
Phase Transformations, Iron and Steel, Characterization |