Efecto del conteo de nódulos en la resistencia al desgaste por abrasión de los hierros dúctiles austemperados. // Effect of nodules count in the waste by abrasion resistance for ductile austempering irons.
Abstract
Entre los materiales metálicos de mayor demanda, la producción de hierro con grafito nodular, ocupa en la actualidad uno
de los lugares más importantes entre los hierros fundidos de alta resistencia, y con la introducción del tratamiento térmico
de austemperado aplicado a estas fundiciones, se da lugar a una nueva familia de materiales, caracterizados por su alta
resistencia mecánica y elevada tenacidad, que mantienen la economía y facilidad de producción de las fundiciones
nodulares.
Este trabajo, hace una valoración del comportamiento de hierros nodulares, con diferentes conteos de nódulos, a los que les
fue aplicado el tratamiento de austemperado y posteriormente se les sometió a ensayos de desgaste abrasivo.
Con los resultados obtenidos se hace un análisis de la influencia del conteo de nódulos en dichas propiedades, así como
también de la interrelación del conteo de nódulos con las variables de tratamiento térmico utilizadas en las muestras
ensayadas.
Palabras claves: Hierro nodular, conteo de nódulos, austemperado.
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Abstract.
Between the metallic materials of greater demand, the iron production with nódular graphite occupies at the present time,
one of the most important places between fused irons of high resistance, and with the introduction of the austempering heat
treatment, applied to these meltings, brings a new family of materials, characterized by its high mechanical resistance and
elevated tenacity, that maintain the economy and facility of production of the nodular smeltings.
This work makes a valuation of the nodular irons behaviors, with different counts from nodules, to which the austempering
treatment was applied, and later they were put under tests of abrasive wearing.
Of the obtained results, takes control of the influence the nodules count in these properties, as well as, of the interrelation of
the nodules count, with the used variables of heat treatment in the tried samples.
Key words: nódular Iron, count of nodules, austempered.
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