Actual Problems in Machine Building 2017 Vol. 4 No. 2

Actual Problems in Machine Building. Vol. 4. N 2. 2017 Materials Science in Machine Building ____________________________________________________________________ 112 2. Dindaa G.P., Dasguptaa A.K., Mazumderb J. Laser aided direct metal deposition of Inconel 625 superalloy: microstructural evolution and thermal stability // Materials Science and Engineering A. – 2009. – Vol. 509. – P. 98–104. – doi: 10.1016/j.msea.2009.01.009. 3. Dwivedi R.; Zekovic S., Kovacevic R. A novel approach to fabricate unidirectional and branching slender structures using laser-based direct metal deposition // International Journal of Machine Tools and Manufacture. – 2007. – Vol. 47, iss. 7–8. – P. 1246–1256. – doi: 10.1016/j.ijmachtools.2006.08.012. 4. Rapid manufacturing of metal components by laser forming / E.C. Santosa, M. Shiomi, K. Osakada, T. Laoui // International Journal of Machine Tools and Manufacture. – 2006. – Vol. 46. Iss. 12–13. – P. 1459–1468. – doi: 10.1016/j.ijmachtools.2005.09.005. 5. Материаловедение и технология металлов: учебник для студентов машиностроительных специальностей вузов / Г.П. Фетисов, М.Г. Карпман, В.М. Матюнин и др.; под ред. Г.П. Фетисова. – 5-е изд., стер. – М.: Высшая школа, 2007. – 862 с. 6. Microstructure evolution in a Ni–Mo–Cr superalloy subjected to simulated heat-affected zone thermal cycle with high peak temperature / J. Yang, Y. He, C. Qin, W. Zhao, S. Chen, Z. Gao // Materials & Design. – 2015. – Vol. 86. – P. 230–236. – doi: 10.1016/j.matdes.2015.07.085. 7. Особенности материала, полученного высокоскоростным прямым лазерным выращиванием сплава на основе никеля / М.В. Рашковец, А.А. Никулина, О.Г. Климова // Актуальные проблемы в машиностроении. – 2016. – № 3. – С. 384–388. 8. Electron microscopy study of direct laser deposition IN718 / R.G. Ding, Z.W. Huang, H.Y. Li, I. Mitchell, G. Baxter, P. Bowen // Materials Characterization. – 2015. – Vol. 106. – P. 324–337. – doi: 10.1016/j.matchar.2015.06.017. FEATURES OF THE PHASE COMPOSITION OF THE MATERIAL, OBTAINED BY HETEROPHASE POWDER METALLURGY OF Ni-BASED ALLOY Rashkovets М. V., Graduate students, e-mail: lipa_04@mail.ru Nikulina A. A. , Ph.D. (Engineering), Associate Professor, e-mail: a.nikulina@corp.nstu.ru Novosibirsk State Technical University, 20 Prospect K. Marksa, Novosibirsk, 630073, Russian Federation Abstract In this paper considers feature of structural and phase composition of initial powder and deposited samples which are Ni-based alloy in according with various operating parameters of device of heterophase powder metallurgy. The microstructure of the longitudinal section of the deposited samples is dendritic structure without defects. Almost combination of operating parameters selected in this study produced samples without defects, except only for samples obtained by 250 W of laser power with unmelted particles of initial materials. Layer thickness and laser power have a liner relation. The X-ray diffraction patterns and date of transmission electron microscopy of initial powder and deposited samples show the presence of Ni-matrix (fcc) solid solution. And, for now, particles of Nb 2 C and Nb 6 C 5 were identified by transmission electron microscopy. Keywords heterophase powder metallurgy, direct laser method deposition, Ni-based alloys, structure, phase composition