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Verification of Changes in the Mechanical Properties and Microstructures Provided by Different Heat Treatments on Sae 1045 Steel


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DOI: https://doi.org/10.15866/ireme.v10i3.7876

Abstract


The aim of this study is to verify through tensile, hardness and metallography tests the influence of heat treatments of martempering, quenching in brine, normalizing and annealing in the mechanical properties and in the microstructure of the SAE 1045 steel. The results found an alteration in microstructural composition, with an increase of over 350 % in hardness and virtually double the necessary strength to break the test specimens that had been treated. Normalizing didn't show significant increases in hardness nor in the necessary strength to rupture the pieces when compared with the treated ones. Annealing increased the toughness, thus making the annealed more ductile. The metallography was able to correlate the change in the microstructure with the mechanical properties. The result obtained also supports the statement that heat treatment is an excellent method for the alteration of mechanical properties, which justifies the wide range of usage of such material in several kinds of projects.
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Keywords


Heat Treatment; Mechanical Tests; Metallography; 1045 Steel

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