Caracterización de la capa de boruros formada durante la austenización de un hierro nodular austemperizado//Characterization of borides coating formed during austenitization of an austempered ductile iron

Authors

  • Urbano Ordóñez‐Hernández Instituto Superior Politécnico José Antonio Echeverría Facultad de Ingeniería Mecánica. La Habana
  • Sarah Parada-de-la-Puente Case New Holland, CNH. Zedelgem
  • Carlos Figueroa-Hernández Instituto Superior Politécnico José Antonio Echeverría Facultad de Ingeniería Mecánica. La Habana
  • Francisco-J. Mondelo-García Instituto Superior Politécnico José Antonio Echeverría Facultad de Ingeniería Mecánica. La Habana
  • Arturo Barba-Pingarrón Universidad Nacional Autónoma de México, UNAM. México D.F.
  • Alfredo del-Castillo-Serpa Instituto Superior Politécnico José Antonio Echeverría Facultad de Ingeniería Mecánica. La Habana

Abstract

En este trabajo se ha investigado el efecto de la austenitización y el borurado simultáneos, a 950 ºC, en la microestructura, la microdureza Vickers y el espesor de la capa borurada en medio líquido de un hierro nodular austemperizado no aleado. Se demostró que es posible obtener una capa de boruros de hierro muy bien estructurada con la microdureza Vickers suficientemente alta (1400 HV)
y con adecuado espesor de capa de 67 μm, sobre un sustrato de ausferrita típico de las fundiciones nodulares austemperizadas. Por medio de un ensayo pin on disc modificado, se comprobó la superior resistencia al desgaste abrasivo de la capa de boruros depositada durante la austenización del ADI, comparada con la máxima obtenida durante el austempering de éste sin aplicar el recubrimiento.

Palabras claves: hierro nodular, borurado, austenización, austemperizado.
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Abstract
The effect of simultaneous austenitization and boriding at 950 ºC, on microstructure, Vickers hardness and boronized layer thickness of a non alloyed austempered ductile iron has been investigated. It was demonstrated that it is possible to obtain a well formed boronized layer with a Vicker hardness sufficiently high (1400 HV), and with an appropriated 67μm layer thickness, on a typical ausferrite ADI substrate. By using a modified pin on disc test, it was demonstrated the higher abrasion wear resistance of borides layer deposited during ADI austenitization process, compared with Vickers hardness of low temperature noncoated austempered ductile iron.

Key words: ductile iron, boriding, austenitization, austempering.

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How to Cite

1.
Ordóñez‐Hernández U, Parada-de-la-Puente S, Figueroa-Hernández C, Mondelo-García F-J, Barba-Pingarrón A, del-Castillo-Serpa A. Caracterización de la capa de boruros formada durante la austenización de un hierro nodular austemperizado//Characterization of borides coating formed during austenitization of an austempered ductile iron. Ing. Mec. [Internet]. 2015 Jan. 1 [cited 2025 Sep. 13];18(1):71-9. Available from: https://ingenieriamecanica.cujae.edu.cu/index.php/revistaim/article/view/510

Issue

Vol. 18 No. 1 (2015): enero-abril

Section

Original article

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