info:eu-repo/semantics/bachelorThesis
Caracterización metalográfica, evaluación de propiedades mecánicas del acero M303, comparación y sustitución entre los aceros 17-4PH Y AISI 420
Fecha
2022-12-05Registro en:
Rojas Vistín, Juan José; Rosero Bolaños, Bryan Israel. (2022). Caracterización metalográfica, evaluación de propiedades mecánicas del acero M303, comparación y sustitución entre los aceros 17-4PH Y AISI 420. Escuela Superior Politécnica de Chimborazo. Riobamba.
Autor
Rojas Vistín, Juan José
Rosero Bolaños, Bryan Israel
Resumen
Currently, the application of stainless steel in industry is increasing due to its features and
characteristic properties. These materials are in high demand in the ecuadorian market, but due to
their scarcity, the possibility that they can be replaced is being studied. The objective of this
Curricular Integration Work was to characterize the metallography, evaluate and compare the
mechanical properties of stainless steels M303, 17-4PH, AISI 420, guaranteeing their substitution
in the market. Destructive and non-destructive tests were developed. It began with the
spectrometry test, with which it was verified that the study steels have a carbon and chromium
content within the permissible and characteristic ranges of stainless steels. Micrographs of study
steels were obtained and it was identified that the micrographs in the three steels showed
martensite and ferrite; a characteristic composition of stainless steel. The analysis of inclusions
to the 17-4PH and AISI 420 steels was carried out, observing that the inclusions in the samples
of the M303, AISI 420 and 17-4Ph steels are small in size and are not considered as starting points
of fatigue, rupture or sudden material failure. Finally, the properties of study steels have the
necessary properties to replace the functionality of the M303 steel, which guarantees the
replacement of the M303 steel by the AISI 420 and 17-4Ph steels. It can be concluded that 17 –
4Ph steel is the most suitable that meets similar or equal mechanical characteristics to M303. It is
recommended to replace M303 steel with 17 – 4Ph steel and perform torsion and fatigue physical
tests for future studies.