Effects of Mechanical Process on Pores of Sintered Porous Metal

Geometrical models are built for connected pores of the sintered porous metal.The mechanical compaction force is controlled to obtain the porous metal with the certain porosity.To exploit the application of the sintered porous metal in industry,this paper studies the effect of EDM,water jet cutting and grinding on the pore structure of the material surface and the gas permeability.SEM and the microscope are used to observe the pore morphology of the porous metal surface after the material is machined.Experimental results show that some pores on the material surface are stuffed after the sintered porous metal is machined by EDM,water jet cutting and grinding,so the gas permeability decreases to a certain extent,but the gas permeability of pores inside the material is maintained.