Porous Inconel 625 alloy products were prepared by a combination of the binder jetting and powder sintering technology. The effect of sintering temperature on the porosity

pore characteristics

microstructure

sintering neck

and tensile properties of porous samples were studied. Firstly

the binder jetting technology is used to prepare green parts

followed by debinding and pressureless sintering to obtain porous specimens. Metallography and fracture morphology were observed through optical microscopy and scanning electron microscopy respectively to characterize and analyze pore characteristics

microstructure and sintering behavior

and the porosity and mechanical properties were characterized by Archimedes drainage method and tensile test respectively. The experimental results show that when the sintering temperature increases from 1150 ℃ to 1280 ℃

the porosity of the sintered product decreases from 24.8% to 8.63%

and the tensile strength increases from 316 MPa to 515 MPa. The best comprehensive performance can be obtained when sintered at 1250 ℃

with a porosity of 17.16% and a tensile strength of 451 MPa. This method provides a new approach for the preparation of porous materials and provides a reference for the influence of sintering temperature on pore structure and mechanical properties of Inconel 625 porous materials formed by binder jetting.