Abstract
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 m 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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