Presence oxides on sliding surfaces can greatly influence friction and wear. Oxides have been usually considered as a friction and wear reducing agent acting as a solid lubricant. Effects of pre-oxidation, carried out at different temperatures, on the tribological behaviour of a high-speed steel and a high chromium white cast iron sliding against a ceramic material have been studied in this work. Wear was evaluated through a new methodology, which calculates the volume of removed material from topography data of the worn surface. Wear mechanisms were determined by scanning electron microscopy analysis. Results showed a large difference between wear rate of the studied materials. High speed steel had a much lower wear than high chromium white cast iron. However pre-oxidation did not cause any meaningful influence on the tribological behaviour of both material, at least in the conditions evaluated in this work.

Volume Subject Area:
Tribology
Keywords:
previous oxidation, wear, friction, multi-component ferrous alloys
Topics:
Alloys, Friction, Oxidation, Wear
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