Influencia del tiempo de nitruración en baño de sales en el comportamiento tribológico de un acero de herramientas AISI H13

G. Castro; A. Fernández-Vicente

doi:10.3989/revmetalm.2007.v43.i6.83

Authors

G. Castro Área de Materiales y Procesos de Fabricación, Centro Tecnológico AIMEN
A. Fernández-Vicente Área de Materiales y Procesos de Fabricación, Centro Tecnológico AIMEN

DOI:

https://doi.org/10.3989/revmetalm.2007.v43.i6.83

Keywords:

AISI H13, Wear, Sursulf nitriding Nitriding salt bath, Pin-on-disk tribometer

Abstract

Tribological high temperature characteristics of a H13 tool steel treated by salt bath have been studied. AISI H13 steel samples were nitrided by a sursulf bath, varying nitriding time from 1 to 24 h. Optical microscopy and micro-hardness deep profile through the nitrided layer were performed for each nitriding time. Standard pin-on-disk wear tests were conducted at high temperature. Sliding distance was varied from 150 m to 900 m. It has been observed that friction coefficient does not change with nitriding time and wear rate varies as a function of the sliding distance due to the presence of different wear mechanisms. For short sliding distances, the wear mechanisms that contribute to the total wear were plastic deformation and abrasion, whereas for greater sliding distances the mechanisms that control wear behaviour were oxidation and abrasion.

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