Combined Method of Finishing Surface Treatment of Metal Products Fabricated by Methods of Additive Manufacturing / A.D. Teresov, P.V. Moskvin, E.A. Petrikova, O.V. Krysina, N.N. Koval, Yu.H. Akhmadeev

Секция 3. Модификация свойств материалов = Section 3. Modification of Material PropertiesРазработан комбинированный способ финишной обработки поверхности металлических изделий, изготовленных методами аддитивного производства, сочетающий в едином вакуумном цикле предварительное дуговое напыление покрытия и последующую импульсную электронно-пучковую модификацию системы «пленка/подложка». Это позволило уменьшить шероховатость поверхности и провести легирование подложки материалом покрытия, с целью придания ей требуемых механических свойств.Исследование выполнено за счет гранта РФФИ №19-48-700021.Works on formation on a surface of the samples of Ti64 titanium alloy made by method of additive manufacturing, the film/substrate system with the subsequent mixing by means of a pulse electron beam are carried out. Zirconium film of 2 µm thick was deposited by method of plasma assisted arc in the presence of gas plasma of arc discharge generated by «PINK» plasma generator. Superficial alloying of a substrate with material of the deposited film and finishing processing of a surface was carried out as a result of pulse melting of the film/substrate system by a high-intensity pulsed electron beam. Mechanical properties of a surface of the modified samples (roughness, microhardness, structure, wear resistance) made by means of additive technologies and irradiated in selected optimum modes in comparison with initial samples are defined. Mechanical tests of samples on stretching are carried out («Instron», model 3369). Regularities of change of structure and mechanical properties of a surface depending on the mode of processing of samples are revealed. It is shown that alloying of the samples of Ti64 titanium alloy made by method of additive manufacturing in a single vacuum cycle on «COMPLEX» installation by deposition of a thin film of zirconium and the subsequent liquid-phase mixing by means of pulse electron beam treatment allows considerably to reduce roughness and porosity of a surface layer and to increase its mechanical properties. In the optimum modes of processing the increase in microhardness at ≈ 40% in comparison with initial samples has been received. Values of roughness, tensile strength and wear resistance correspond to initial material