Abstract: In order to investigate the effect of selective laser melting (SLM) forming technology on 10%SiC particle reinforced AlSi10Mg composite material, the microstructure, relative density and physical properties of forming parts were studied by using different combination range of for-ming process parameters (scanning speed and scanning spacing). The results show that, under the same scanning power, when the scanning spacing increases from 0.05 mm to 0.14 mm, the density of composite samples formed by SLM first increases and then decreases. When the scanning speed increases from 700 mm/s to 1 700 mm/s, the density of composite samples also increases first and then decreases. When the laser power is 300 W, the thickness of powder layer is 0.03 mm, the scanning speed is 1 100 mm/s, and the scanning spacing is 0.11 mm, the relative density of 10%SiC particles reinforced AlSi10Mg composite material could reach 98.34%, and the brinell hardness was 189HBW. At the same time, there are few holes and cracks in the sample, SiC particles are uniformly distributed in the aluminum matrix, and there have a good interface reaction between SiC particles and aluminum matrix.
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2020, Vol. 34 
