Influencia del manganeso en la producción de hierros nodulares ferríticos // Influence of manganese content on the production of ferritic ductile iron

Authors

  • T. Rodríguez Moliner Instituto Superior Politécnico José Antonio Echeverría. Facultad de Ingeniería Mecánica. Departamento de Tecnología de la Construcción de Maquinarias. Grupo de Materiales. Calle 127 s/n, CUJAE, Marianao 15, Ciudad de La Habana, Cuba. Telefono: (53 7) 27 1208 Fax: (53 7) 27 1208
  • T. Ross Yañez Instituto Superior Politécnico José Antonio Echeverría. Facultad de Ingeniería Mecánica. Departamento de Tecnología de la Construcción de Maquinarias. Grupo de Materiales. Calle 127 s/n, CUJAE, Marianao 15, Ciudad de La Habana, Cuba. Telefono: (53 7) 27 1208 Fax: (53 7) 27 1208

Abstract

El estudio del efecto del manganeso en los hierros nodulares es de suma importancia. Todos los autores concuerdan que para la
producción de hierros ferríticos es de suma importancia que el contenido de manganeso debe ser lo mas bajo posible. Sin
embargo no existe un consenso de cuan bajo debían ser estos niveles, ya que depende conjuntamente de otros factores.
Este trabajo se propuso determinar limites de concentración de manganeso para barras de 25mm de ancho y con una buena
estructura del grafito, obteniendo en cada caso hierros ferríticos directamente de fundición.
Dichos limites fueron encontrados en 0.15% para producir el hierro nodular 40-18 y en 0.6% para el 42-12. Contrariamente a
estudios anteriores, no se encontró ningún efecto del mismo en el conteo de los nódulos. Se determinó que el manganeso tiende
a disminuir el rango de temperaturas entre la reacción estable y la inestable de descomposición de la austenita, a pesar de hacer
decrecer ambas temperaturas


Palabras claves: Hierros nodulares, manganeso, ferri ta.

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Abstract
The study of the manganese effects on ductile irons is very important. Several authors agree that for the obtainment of ferritic
iron grades its content should be kept as low as possible. However there is not a complete agreement on the exact levels the
manganese content should be, when the intention is to use as-cast procedures.
The aim of this paper was to determine the manganese limits for the obtainment of ferritic grades as-cast on 25 mm bars with a
good graphite structure. Such limits were found to be 0.15% for the 40-18 grade and 0.6% for the 42-12 iron grade.
On the contrary of previous studies no effect of manganese on nodule count was found. Manganese was found to decrease the
temperature range between the stable and the metastable austenite decomposition reaction, besides it decreases both
temperatures.


Key words: Duct i le iron, manganese ef fect s, ferri te.

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How to Cite

1.
Rodríguez Moliner T, Ross Yañez T. Influencia del manganeso en la producción de hierros nodulares ferríticos // Influence of manganese content on the production of ferritic ductile iron. Ing. Mec. [Internet]. 1999 Jul. 1 [cited 2025 Sep. 13];2(2):81-5. Available from: https://ingenieriamecanica.cujae.edu.cu/index.php/revistaim/article/view/389

Issue

Vol. 2 No. 2 (1999): july-december

Section

Original article

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