Estudio de la evolución del porcentaje de carbono en la martensita del acero 1045 sometido a tratamientos térmicos a temperaturas intercríticas

Abstract

This paper presents the analysis of the evolution of the percentage of carbon in one of the phases of AISI SAE-1045 steel subjected to intercritical temperatures for the tempering process using as cooling method water at and after room temperature Tempering temperatures, the first at 300 ° C below the temperature required by the chemical composition of the present material for the formation of martensite and the second at 400 ° C above this, using air at room temperature as the cooling medium. The techniques and theories used for the development of the project have to do with theories about the metallographic characterization for the analysis of this type of material. Among the equipment used is a furnace muffle that served to temper and revenge the samples previously cut and then prepare them for metallographic analysis with the objective of identifying the martensitic phase and bring the results to a computer, then determine the variation of the Percentage of carbon, hardness present in this phase and its relation with this element and the different temperatures to which it was submitted. The result obtained was complemented with a further analysis of chemical composition specifically in the area of ​​martensitic formation performed by the SEM team of the laboratories of the University of the Andes, this allows us to have a greater certainty of its composition in this phase and to determine how Influences the percentage variation of the carbon of the AISI SAE-1045 at different temperatures and the variation of the hardness due to this element that is the purpose of this project.