单体种类对光固化增材制造5052铝合金的影响  

Effects of Monomer Types on Additive Manufacturing of5052 Aluminum Alloy with Light⁃Curing Strategy

作　　者：刘明信 乔聪卓 彭超群[1] 王日初[1] 柏松[1] 王小锋[1] LIU Mingxin;QIAO Congzhuo;PENG Chaoqun;WANG Richu;BAI Song;WANG Xiaofeng(School of Materials Science and Engineering,Central South University,Changsha 410083,Hunan,China)

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《矿冶工程》2024年第2期145-152,共8页Mining and Metallurgical Engineering

基　　金：福建省重大科技专项(2023HZ021005)。

摘　　要：针对光固化增材制造5052铝合金时存在的浆料不稳定、烧结体密度偏低和碳残留量较高等问题,研究了树脂单体种类对铝合金光固化增材制造的影响。结果表明,单体种类对光固化增材制造5052铝合金的成型工艺和烧结体性能具有重要影响。采用单体TMPTA或PEG400DA的铝浆黏度大于30 Pa·s,沉降时间大于120 h,成型的铝合金坯体结构完整但表面孔洞较多;采用单体PEG200DA或HDDA的铝浆黏度低于30 Pa·s,但沉降时间小于16 h,成型的铝合金坯体表面无孔洞但结构易残缺;采用单体PS-PCL的铝浆黏度低于30 Pa·s且稳定不易沉降,坯体表面无孔洞且结构完整。采用优选单体PS-PCL制备固含量55%铝浆,打印成型并烧结后,其相对密度大于95%,碳残留量相对较低(0.259 17%),断口烧结颈明显,硬度相对较高(29.94HV)。To solve the problem of unstable slurry,low density of sintered body,and high carbon residue,the effect of different resin monomer on additive manufacturing of 5052 aluminum alloy with light curing strategy was explored.It is found that different type of monomer can bring great impact to the process of additive manufacturing with light curing strategy and the properties of the following sintered product.When the aluminum slurry prepared with TMPTA or PEG400DA has viscosity higher than 30 Pa·s and settling time is more than 120 h,the formed aluminum alloy substrate has a complete structure with more pores on the surface.When the aluminum slurry prepared with PEG200DA or HDDA has viscosity less than 30 Pa·s and the settling time is less than 16 h,the formed aluminum alloy substrate has no pores on the surface,but is prone to have incomplete structure.When the aluminum slurry prepared with PS⁃PCL has viscosity less than 30 Pa·s,and is stable and not prone to settling,the formed substrate has a complete structure with no pores on the surface.When the aluminum slurry with solid content around 55%was prepared with PS⁃PCL,after additive manufacturing process and sintering,the obtained sintered product has the relative density higher than 95%,relativly lower carbon residue(0.25917%)and relatively higher hardness(29.94HV),with obvious necking growth on the fracture.

关 键 词：5052铝合金 增材制造 光固化 3D打印 单体 铝浆黏度 相对密度 

分 类 号：TB302[一般工业技术—材料科学与工程]