Resistencia a la corrosión de un acero inoxidable martensítico nitrogenado con alto contenido de carbono diseñado y producido a bajas presiones de nitrógeno
Publicado 2023-12-01
Palabras clave
- martensítico,
- acero nitrogenado,
- CALPHAD,
- corrosión,
- dureza
- MEV,
- polarización,
- carburo,
- potencial,
- densidad de corriente,
- acero de herramientas,
- acero inoxidable ...Más
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Derechos de autor 2023 Revista UIS Ingenierías
Esta obra está bajo una licencia internacional Creative Commons Atribución-SinDerivadas 4.0.
Resumen
Fue diseñado mediante el método CALPHAD un nuevo acero inoxidable martensítico con alto contenido de nitrógeno y carbono a bajas presiones. La composición química del acero se verificó mediante espectrometría de emisión óptica, obteniendo 0,17% en peso de N y 1,33% en peso de C. Se realizaron análisis de microscopía electrónica de barrido (SEM) para la caracterización microestructural. Las propiedades del acero se evaluaron mediante pruebas de dureza Rockwell y polarización potenciodinámica en solución de NaCl al 0,6 M. El acero mostró valores máximos de dureza de 60 HRC, considerándose un material duro. Sin embargo, dado el alto contenido de carbono que promovió el exceso de carburos ricos en Cr, se evitó la formación de película pasiva.
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Referencias
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