This study investigates heat treatment methods and their impact on mechanical properties in AISI 4140 steel, suggesting optimal conditions for enhanced performance.
Key Points
Optimal heat treatment combinations were identified for AISI 4140 steel, improving mechanical properties.
The most effective parameters included 900 °C and 2 h for annealing, 919 °C and 2 h for normalizing, and 944 °C and 1 h for oil quenching.
Microstructural analysis highlighted grain coarsening effects due to temperature increases, linking hardness reduction to improved impact energy.
Regression equations generated for hardness and impact energy had R square values exceeding 90%, indicating strong predictive validity.