Binder jetting is a kind of powder bed based manufacturing technology,which achieves near-net forming by selectively deposition of liquid binder to connect powder particles,and finally consolidation by sintering process.It is widely favored because of its relatively simple process,wide material adaptability and potential for mass production.In this paper,the process factors affecting the density and dimensional accuracy of binder jetting were summarized.The characteristics of powder,powder spreading methods,binder selection and its interaction with the powder bed are the keys to control the density and dimensional accuracy of green part.Sintering and infiltration are the main post-treatment methods,and higher densification can be achieved by means of sintering aid,step-by-step sintering process and supersolidus liquid phase sintering.Binder jetting has been widely used in casting,medical equipment,3C industry,etc.The large-scale industrialization of the technology can be promoted by further optimizing the binder system,the whole process automation equipment and improving the densification and post-treatment technology.
binder jettingpowder bed qualitybinderprint parameterssinteringinfiltration
NETL
NSTL
万方数据
维普
