Abstract
Quenching and self-tempering (QST) is an advanced thermo-mechanical process for “H” shaped steel beams. QST is an intensive surface cooling and self-tempering process that provides the grain refinement needed for high strength of low-carbon steels. However, the application of quenching often results in substantial deformation due to the formation of the martensitic microstructure at a high cooling rate. Quench deformation has been a complex metallurgical phenomenon that is difficult to accurately control in the beam-making process. A correlation between shape distortion and temperature distribution was therefore investigated through a lab-scale test. The thermal deformation was also analyzed numerically by using a commercial finite element program ANSYS APDL to explain the thermal expansion and contraction mechanisms of quenched steel beams. A metallurgical effect was sub-coded to follow a phase transformation in the quenching simulation. The theoretical approach and numerical simulation of the H-beam quenching are compared to the experimental findings.
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Abbreviations
- CCT:
-
Continuous cooling transformation
- CR:
-
Cooling rate
- HTC:
-
Heat transfer coefficient
- QST:
-
Quenching and self-tempering
- SCT:
-
Start cooling temperature
- TC:
-
Thermocouple
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Koo, B.S. Effect of Phase Transformation and Recalescence on the Squareness of Steel Beams in Water-Jet Quenching. Metall Mater Trans B 54, 2840–2851 (2023). https://doi.org/10.1007/s11663-023-02878-2
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DOI: https://doi.org/10.1007/s11663-023-02878-2