Mechanisms of structure formation in hypereutectic alloys of the Al – Si system during micro-laser facing are studied. Grain size composition, surface morphology, microstructure, and phase composition of starting powder of different chemical composition are determined. The effect of facing parameters on facing bead structure and geometrical properties is studied. The fundamental technological possibility of using micro-laser facing in order to obtain high-precision component structural elements made of aluminum alloys with lateral resolution of about 100 μm is studied. Recommendations are made for micro-laser facing of hypereutectic alloys of the Al – Si system with an indication of optimum treatment regimes and starting powder chemical composition.
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Experiments for laser facing were performed in the Fraunhofer IWS Institute, Dresden, Germany.
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 5, pp. 16 – 21, May, 2013.
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Grigor’ev, S.N., Tarasova, T.V., Gvozdeva, G.O. et al. Micro-Laser Facing of Al – Si System Alloys. Met Sci Heat Treat 55, 242–246 (2013). https://doi.org/10.1007/s11041-013-9613-9
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DOI: https://doi.org/10.1007/s11041-013-9613-9