This paper studies the influence of variables such as holding temperatures and times during austempering of High Chromium White Cast Iron (HCWCI), with the following chemical composition: Cr 25 %, C 3 %, Si 0.47 %, Mn 0.74 % and Mo 1.02 %. The aim of the austempering was to modify the percentage of retained austenite and its correlation to abrasive wear resistance under different conditions. Microhardness tests, SEM-EDS and XRD were performed to determine mechanical properties, chemical composition, and type of carbides and microstructures present, respectively. The tests complied with the ASTM G-65 standard. Results showed that the best performance against abrasion was achieved for austempering at 450 ºC with holding time of 6 hours.Keywords: Austempered; Retained austenite; Abrasive wear; High chromium white cast iron; Chromium carbides. ResumenEste trabajo estudia la influencia de variables tales como tiempo y temperatura de sostenimiento durante el austemperado de una fundición blanca al alto cromo con la siguiente composición: Cr, 25 %; C, 3 %; Si, 0.47 %; Mn, 0.74 %, y Mo, 1.02 %. El objetivo del austemperado fue modificar el porcentaje de austenita retenida, y * Ph. D. Universidad del Atlántico (Barranquilla-Atlántico, Colombia). oscarhiguera@mail.uniatlantico.edu.co. ORCID: 0000-0002-4836-5215. ** Universidad Tecnológica de Pereira (Pereira-Risaralda, Colombia). *** Universidad Tecnológica de Pereira (Pereira-Risaralda, Colombia). **** Ph. D. Universidad del Atlántico (Barranquilla-Atlántico, Colombia). monicamonsalve@mail.uniatlantico.edu.co. ORCID: 0000-0002-9902-8518. ***** Ph. D. Universidad Tecnológica de Pereira (Pereira-Risaralda, Colombia). dhmesa@utp.edu.co. Microstructural evolution during austempering of a ASTM A-532 CLASS III type high chromium white cast iron undergoing abrasive wear correlacionarlo con la resistencia al desgaste abrasivo bajo diferentes condiciones; los ensayos fueron realizados según los lineamientos de la norma ASTM G65. Las técnicas de microdureza MEB-EDS y DRX fueron realizadas para determinar las propiedades mecánicas, composición química, tipo de carburos y microestructuras presentes, respectivamente. Los resultados mostraron que la mejor resistencia a la abrasión fue alcanzada a una temperatura de austemperado de 450 ºC y a 6 horas de permanencia.Palabras clave: Austemperado; Austenita retenida; Desgaste abrasivo; Fundiciones al alto cromo; Carburos de cromo. ResumoEste trabalho estuda a influência de variáveis tais como tempo e temperatura de sustentabilidade durante o austemperado de uma fundição branca ao alto cromo com a seguinte composição: Cr, 25 %; C, 3 %; Si, 0.47 %; Mn, 0.74 %, e Mo, 1.02 %. O objetivo do austemperado foi modificar a porcentagem de austenita retida, e correlacioná-lo com a resistência ao desgaste abrasivo sob diferentes condições; os ensaios foram realizados segundo as diretrizes da norma ASTM G65. As técnicas de microdureza MEB-EDS e DRX foram realizadas para determinar as propriedades mecânicas, composição química, tipo de carbonet...
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