The invention discloses a high-strength Al-Cr-SC
alloy through 3D printing. The
metal powder for a high-strength aluminum-
chromium alloy through 3D printing comprises the following components, by masspercentage, 2.5-10% of Cr, 0.5-2.5% of Mg, 0.1-0.9% of Sc, 0.2-0.7% of Zr, 0.1-0.3% of Si, 0.2-0.45% of Mn, 0.1-0.35% of Fe, 0.1-0.25% of Ti, 0.05-0.5% of AlCl3
powder, 0.05-0.3% of CaCl2 + NaCl andthe balance Al. The preparation method of the
metal powder comprises the following steps that Al, Cr, Mg, Sc, Zr, Si, Mn, Fe, Ti pure
metal block raw materials are weighed to be heated and melted, atomized for powder making, sieving and heat preservation for
drying are conducted, AlCl3, CaCl2 and NaCl powder are added, and milling and mixing are conducted. According to the high-strength Al-Cr-SC
alloy through 3D printing, the printed aluminum alloy part has no cracks and has
high density, and the mechanical properties,
wear resistance,
corrosion resistance and high temperature and
oxidation resistance are high.