Elaboration of PIM feedstocks with 316L fine stainless steel powders for the processing of micro-components

The paper is concerned with the way to prepare feedstocks for powder injection moulding of fine stainless steel powders. The way to prepare adequate feedstocks is described, and injection moulding experiments are determined. The effects of powder volume loading, as well as mixing conditions are investigated and the results indicate that powder loading, injection moulding conditions and sintering kinetics largely influence the resulting shrinkage after sintering. Finally, the modelling and associated numerical simulations are used the help process design.

Graphical AbstractThe paper concerns the preparation of feedstocks (powder/binder) with fine stainless steel powders for subsequent powder injection moulding (PIM) process. The way to realize micro-components is described, the effects of powder volume loading and the mixing conditions are investigated, as well as, the injection moulding conditions and the sintering stage parameters. The modelling of sintering stage and associated numerical simulations are also used to the help process design (mould cavities). The used model associated to a thermo-elasto-viscoplastic constitutive law is described, as well as the identification methodology for physical parameters.Figure optionsDownload as PowerPoint slide