Abstract
In the present paper, the selective laser melting process of multilayered 3D fabrication from metal matrix composites (MMC) based on nickel-chrome heat resistant alloy with WC ceramic reinforcing additive was implemented. The possibility of a laser powder bed fusion of functional grade (FG) 3D parts from these MMC for the account of increasing the alloying element concentration from 5% to 15%vol of the tungsten carbide in NiCrSiB self-fluxing alloy was shown. The optical and scanning electron microscopy, X-ray and EDX microanalysis, and microhardness measurements have been carried out to evaluate the structure formation features. We strongly recommend additional heating of the initially powdered mixture and/or substrate for temperature gradient reduction in the volume of the 3D part, homogenization of structure and decreasing residual stresses and propensity to delamination.
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