Abstract

The actual surface of a machine part after cutting can differ significantly from the surface that had been anticipated with regard to its mechanical, physical, as well as its technological properties. Due to this fact the functional properties of a particular machine part depend to a great extent on the condition of the surface. This applies especially to dynamically loaded machine parts. Research has been undertaken to establish what actually occurs on the surface and directly underneath It when it is exposed to certain cutting processes. An analysis of fractures on the dynamically loaded machine parts has shown that they occur mainly on the surface or in the layers immediately underneath it. The contribution yields some interesting findings with regard to the influence of a certain cutting process on the condition of the surface and the layers underneath it. The analysis deals with those influences that result from structural changes, a different degree of wear, and the cutting conditions.

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