State of the art of metal powder bonded binder jetting printing technology

Abstract As one of the earlier developed additive manufacturing (AM) technologies, binder jetting (BJT) has the advantages of low cost, high efficiency and no pollution. This article focuses on the research status and problems of BJT printing materials and printing technology. BJT technology can print metal parts with complex structures, which is widely used in medical, aerospace and other fields. The particle size and morphology of the raw powder, the saturation of the binders and the area of the pores size will affect the bonding of the powder bed. In the printing processes, the thickness, orientation and printing speed will affect the mechanical properties of the printed parts. The post-treatment processing has the greatest influence on the mechanical properties of the final parts. Sintering and infiltration can improve the mechanical strength of the parts. Mechanical grinding, such as polishing and grinding, can affect the surface roughness of parts. Selecting suitable technological parameters for different characteristics of materials is particularly important for the future development of BJT printing.