The embodiment of invention relates to a method for preparing a
porous tantalum additive. The method for preparing the
porous tantalum additive comprises the following steps that a three-dimensional model of a to-be-machined workpiece is constructed;
slicing treatment is conducted on the three-dimensional model and sliced layer data are acquired, scanning path planning is conducted on the sliced layer data, and scanning path data are formed; the scanning path data are imported into
electron beam selective melting equipment;
powder grading is conducted on spherical
tantalum powder, and spherical
tantalum powder with
apparent density greater than 9g / cm<3> is acquired; the
oxygen content of the spherical
tantalum powder is less than 150 ppm; and spherical tantalum powder with apparent densitygreater than 9g / cm<3> is loaded into the
electron beam selective melting equipment, selective melting scanning is conducted on spherical tantalum powder according to the scanning path data, and a target workpiece is acquired. According to the method for preparing the
porous tantalum additive disclosed by the embodiment of the invention, on the one hand, working procedures are simple, follow-up treatment is not needed, secondary
pollution is avoided, and moreover, biological stability of the porous tantalum additive as a
human body implant is high in long-term use; and on the other hand, porous tantalum prepared with the method is low in
oxygen content, light in weight and high in compression strength and has outstanding
plasticity.