Modeling of 3-d printing using non-spherical hydrogenated - dehydrogenated titanium powders

The purpose of research was to determine the possibility of using non-spherical titanium powders of irregular shape for additive technologies. Methodology: modeling of layering of a part was carried out by technology, similar to selective sintering technology. Powder brand PT was used as a raw material, that was obtained by mechanical crushing of titanium sponge TG100 and subsequent sieving by fractions. Powder with a fraction of 50...150 ^m was chosen for research. It was previously hydrogenated and dehydrogenated with a view to cleaning of contaminants, sealing its structure and bringing it closer to a spherical shape for modeling the 3-D printing process by SLS technology (Selective Laser Sintering). The pulsed laser with emission power of 900 W/s at a frequency of 20 Hz exposure (continuous exposure) was used as a source of energy for the sintering powder particles with each other. Findings: in the study of the obtained samples there was found that the thickness of the layers obtained in the first case was 200...300 ^m and in the second case 50...100 ^m. When the thinner layer was used for the construction of parts the resulting structure is characterized by a higher density and a lack of pores that will positively affect the properties of the parts obtained by layering methods. Originality: the regularities of formation of structure in the deposited layer during laser fusion technology similar to SLS using hydrogenated and dehydrogenated experimental titanium powders were found. The practical value of the research cosnsists in the posibility of using less expensive titanium powders with irregular shape of the powder particles in additive technologies, instead of spherical powders, which are being used today, which will significantly reduce manufacturing costs while maintaining the properties of the resulting parts.