Abstract
Surface heat treatment by laser radiation develops microstructural constituents with improved wear resistance. However, this technique is limited in terms of the depth of hardened layer achievable. For large wearsurfaces mosaic shaping is practised by the generation of bands, resulting in structural inhomogeneities that can affect tribological behaviour. This paper presents results of research performed to determine the optimum tribological operating conditions for mosaic shaped surfaces. Specimens were prepared by different combinations of volume and/or surface heat treatment; laser mosaic shaping generated bands inclined at various angles to the displacement directions. Loadbearing capacity, friction coefficient, and wear resistance have been investigated. The results demonstrate improvements to laser mosaic shaping techniques for large wear surfaces.
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