“Effect of Heat Treatment Variables on Microstructure and Mechanical Properties of Aisi 4130 Low Alloy Steel’’
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The present study investigates the effect of heat treatment on the microstructure and mechanical properties of AISI 4130 steel. The material was subjected to a sequence of normalizing, hardening, and tempering treatments to evaluate the influence of tempering temperature on performance characteristics. Normalizing was carried out at 890°C followed by air cooling, resulting in a refined ferrite–pearlite microstructure. Subsequently, hardening was performed at 860°C and followed by quenching to obtain a martensitic structure.
Tempering was conducted at two different temperatures, 472°C (Sample A) and 518°C (Sample B), to study the variation in mechanical behavior.
The results highlight that tempering temperature plays a critical role in tailoring the balance between strength and toughness in AISI 4130 steel. This study provides useful insights for optimizing heat treatment parameters for engineering applications requiring a combination of mechanical performance and structural reliability.
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References
Poloprudský, J., Chlupová, A., Šulák, I., & Obrtlík, K. (2023). Effect of heat treatment on the microstructure and fatigue behaviour of AISI 4130 steel. Metallic Materials/Kovove Materialy, 61(6).
Heidary, O., Mirzaee, O., Raouf, A. H., & Borhani, E. (2020). UP-quenched SAE 4130 steel: Mechanical properties assessment and bainite formation. Materials Science and Engineering: A, 787, 139479.
Kachomba, T., Mutua, J., & Ngoret, J. (2024). The Effects of Heat Treatment on Mechanical Properties and Microstructure of Wire-arc Additive Remanufacturing of AISI 4130 Steel Components. SSRG Int. J. Mech. Eng., 11(4), 40-55.
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