砂型3DP打印参数对ZL205A合金铸造性能的影响  

Effect of Printing Parameters of 3DP Sand Mold on the Casting Performance of ZL205A Alloy

作　　者：王春辉 杨光昱[1] 阿热达克·阿力玛斯 李晓刚 介万奇[1] WANG Chunhui;YANG Guangyu;Aredake ALIMASI;LI Xiaogang;JIEWanqi(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China;Northwest Industries Group Co.Ltd.,Xi'an 710043,China)

机构地区：[1]西北工业大学凝固技术国家重点实验室,西安710072 [2]西北工业集团有限公司,西安710043

出　　处：《金属学报》2022年第7期921-931,共11页Acta Metallurgica Sinica

基　　金：国家重点研发计划项目No.2018YFB1106800;宁夏“十三五”重大科技项目No.2018BCE01001~~。

摘　　要：采用约束杆法和单螺旋流动性法研究分析了不同砂型3DP打印参数(呋喃树脂含量1.5%~3.0%(质量分数,下同)、打印层厚0.28~0.32 mm)条件下ZL205A合金的铸造热裂倾向性和流动性。结果表明,ZL205A合金的铸造热裂倾向性随树脂含量的增加先增加后减小,随打印层厚的增加而减小,ZL205A合金的铸造热裂倾向性与3DP砂型强度显著相关。ZL205A合金的铸造流动性随着树脂含量的增加而减小,随打印层厚的增加而减小。通过理论回归和归一化方法,建立了砂型3DP打印参数与ZL205A合金铸造性能间的回归方程,确定了适合于ZL205A合金砂型铸造的较优砂型3DP打印参数:呋喃树脂含量1.5%,打印层厚0.28 mm。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.

关 键 词：3DP打印技术 砂型铸造 ZL205A铝合金 热裂倾向性 流动性 

分 类 号：TG245[金属学及工艺—铸造]