Laser Deposit Surface Control Using Select Fluxes and Electrochemistry
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Apr 21, 2015
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Apr 21, 2015
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Abstract
Method and apparatus (20) for forming a smooth metal surface (42) on a metal substrate (22). A melt pool (32) solidifying under a layer of molten electrolytic slag (34) on the metal substrate is subjected to a DC current (12) between a cathode (28) in contact with the molten slag and the substrate, thereby causing anodic leveling of the surface. The cathode may be buried in a layer of flux material (26) which is melted by a laser beam (30) traversing the substrate. A filler material (24) may be melted coincidently in an additive process. The flux material includes electrolytic, optically transmissive and viscosity reducing constituents.
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