砂型 3DP 打印参数对 ZL205A 合金铸造性能的影响

Sand inkjet three-dimensional printing (3DP) technology is ideal for rapidly producing sand mold and sand core for complex thin-walled castings without using traditional casting flasks and patterns, as it offers high printing speed, high dimensional accuracy, good collapsibility, high productivity, and low cost. The constrained rod casting and single spiral fluidity methods were used to investigate the hot tearing susceptibility (HTS) and fluidity of ZL205A casting alloy under various printing parameters of a 3DP sand mold (furan resin content 1.5%-3.0% (mass fraction), printing layer 0.28-0.32 mm). The HTS of the ZL205A alloy first increased and then decreased with increasing resin content, whereas steadily decreased as the printing layer thickness increased. The HTS of the ZL205A alloy was mainly related to the strength of the 3DP sand mold. The fluidity of the ZL205A alloy decreased with increasing resin content and printing layer thickness. Finally, using the theoretical regression and normalization method, the regression equations between the 3DP sand mold's printing parameters and ZL205A alloy's castability were established. The optimized 3DP-printing parameters suitable for ZL205A alloy using 3DP sand mold casting were determined. The resin content was 1.5%, and the printing layer thickness was 0.28 mm.