Abstract：MoRe14 alloy parts were prepared by selective laser melting 3D printing technology. The effects of la‐
ser scanning speed and laser scanning power on the microstructure and internal defects of MoRe14 alloy samples
were studied. The results show that there are obvious cracks and holes in the MoRe14 alloy samples prepared by la‐
ser selective melting 3D printing technology. With the increasing of laser power or decreasing of laser scanning
speed, the laser energy density increases, the fusion between powder particles improves, the internal pores of the
samples are reduced and the density of the samples is improved, but there are pores and cracks in the samples.The
spherical MoRe14 alloy powder prepared by coating method has the highest density when the laser power is 180 W,
the scanning speed is 900 mm/s and the scanning spacing is 0.07 mm, the density is 10.6 g/cm3 and the relative den‐
sity is 96.4%.
2022, Vol. 32 
