6. Conclusion

Heat treatment plays an essential role in construction and civil engineering, enabling the properties of metallic materials to be modified and optimized. By understanding TTT and TRC diagrams and the impact of additive elements, it is possible to precisely control structural transformations during heat treatment. In addition, specific treatments such as annealing, quenching and tempering, as well as thermochemical treatments such as carburizing, nitriding and carbonitriding, pave the way for significant improvements in part properties in mechanical engineering.