Oxidation and tribo-oxidation of an alloy steel H13 at elevated temperature

Abstract

Abstract

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. Fe₂O₃ as the main oxide was identified except for a small amount of Fe₃O₄. 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 Fe₃O₄ and less Fe₂O₃ were predominant tribo-oxides with a large amount of α-Fe appearing on the worn surface.