Abstract
The corresponding relationships between the chemical compositions and the morphological structures of oxide layers — the friction and wear properties of oxides, the chemical states of frictional surfaces and the microstructures of the steel surface and subsurface layers in frictional processes have been explored. The experimental results illustrate that various kinds of oxide layers have different friction and wear characteristics and these greatly influence the variations in the chemical states of surfaces and the microstructures of the surface and subsurface layers of steel. A uniform fine layer of oxides, composed mainly of Fe 3O 4, helps to improve the antifrictional properties of frictional pairs and forms well deformed layers of the metal. Thicker oxide layers help organic substances to adhere to the frictional surfaces and to generate new compounds. The tribological behavior of surface oxides of a medium carbon steel is discussed in this paper.
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