Samples of products of domestic nonspherical powders of VT-20 titanium alloy were produced by the method of electron beam 3D fusion. Microstructure of deposited metal is pore-free, finely dispersed and uniform over the entire surface of the section. It is acicular a′-phase of titanium with a small content of b-phase. Sample microhardness is from HV 3960 to HV 4150 MPa. Uniform distribution of alloying elements and decreased content of aluminium due to its volatility in deposition was noted. Presence of insignificant porosity and increased roughness on part edges was detected. The methods of their elimination were obtained. 10 Ref., 1 Table , 11 Figures.

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The process of hybrid laser-microplasma welding of sheet Ti Al titanium alloy of TC grade (up to 3.0 mm) was studied. The recommended technological parameters and conditions of laser-microplasma welding in an argon medium, physical and mechanical properties of welded oints were determined, and the presence of hybrid effect was established. 5 Ref., 3 Tables, 7 Figures.

Представлены результаты исследования жаростойкости диффузионных покрытий на стали 08Х17Т и стали 45, полученных методами алитирования и хромоалитирования в порошковых смесях при температуре 900…950 о С в течение 2…5 ч. По кинетическим зависимостям окисления образцов с покрытиями в температурном интервале 800…1000 о С построены параметрические диаграммы жаростойкости, позволяющие проводить оценку долговечности защитных покрытий при температурах до 1000 о С. Библиогр. 8, табл. 3, рис. 7.