The oxidation and tribo-oxidation of an alloy steel H13 under elevated-temperature atmospheric conditions were studied. The structure and morphology of the oxides and tribo-oxides of the steel were characterized using X-ray diffractometer and scanning electron microscope. A loose oxide film wholly covered the surface of the steel after the steel was oxidized at 650 °C for 20 min. Fe 2 O 3 as the main oxide was identified except for a small amount of Fe 3 O 4 . A compact oxide film formed on the worn surface of the steel during wear. The worn surface presented two regions: the delamination region and the the undelamination region, due to the delamination of tribo-oxide during wear. More Fe 3 O 4 and less Fe 2 O 3 were predominant tribo-oxides with a large amount of α-Fe appearing on the worn surface.
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WANG et al. (2009) studied this question.
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