Resumo

MARINO-CALA, Maritza; SANCHEZ-HECHAVARRIA, Yanier; MASCARELL-BATISTA, Ángel Eduardo  e  MARTORELL-FERNANDEZ, Ernesto. Simulation of the phase transformations of the modified heat resistant alloy HK 40. Rev Cub Quim [online]. 2022, vol.34, n.3, pp. 522-544.  Epub 24-Out-2022. ISSN 2224-5421.

In this work, the simulation of the phase diagram of the heat-resistant alloy ACI HK 40 modified with the addition of different contents of elements such as aluminum and boron is carried out, using the Thermo-Calc Software. Its application allowed obtaining the phase diagram and evaluating the evolution of the fractions of solid phases, during solidification, under equilibrium conditions in the temperature and composition ranges corresponding to the precipitation windows of the phases obtained in correspondence with the estimated mechanical properties. As well as, the evolution of the microstructure of the steel when subjected to high temperatures is predicted, prevent the precipitation of unwanted secondary phases such as the sigma phases (σ) and predict the feasibility of applying thermal treatments to induce the precipitation of said secondary phases that could increase the alloy heat resistance.

Palavras-chave : ACI HK 40; simulation; phase transformations; theoretical method; heat resistant alloy.

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