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Information × Registration Number 0217U000214, 0112U002775 , R & D reports Title Investigation of thermal diffusion saturation of controlled gas environments of high two-phase titanium alloys to be used for friction pairs of high durability popup.stage_title Head Pohrelyuk Iryna, Доктор технічних наук Registration Date 31-01-2017 Organization Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine popup.description2 A new solution of scientific and technical task of improving the wear resistance of high-strength two-phase titanium alloys by providing of regulated of the surface and volumetric strengthening by the combined of the thermal and thermochemical treatments in a single technological cycle was proposed. The general laws of formation of the level of the surface hardening of the two-phase titanium alloys VT6, VT22 and T110 thermal diffusion saturation with nitrogen in the temperature range 650...900°C was established. It has been shown that increasing the saturation duration, at the same pressure and temperature of the gaseous medium, the parameters of growing nitride layer with reduced nitrogen partial pressure to 0.1...10 Pa reduces the thickness of the nitride layer increases the surface microhardness and depth of the diffusion layer. The dependences' of the phase composition and structure of the surface layers, hardness and depth of the modified layer of two-phase titanium alloy VT6, VT22, and T110 of concentration, temperature and time parameters of the nitriding, combined with heat treatment was established. It is shown that with increasing temperature and the surface hardening is accompanied by enlargement of the structural components of the alloys, which adversely affects the mechanical properties. Reduction of partial pressure of nitrogen to 1 Pa is on 30% is thickening hardened layer on VT22 alloy. Schemes and regimes nitriding two-phase titanium alloys VT6, VT22, and T110, combining in a single technological cycle of the formation of the nitrided layer and obtain the optimum ratio of alpha and beta phases in the titanium matrix, providing regulated near-surface and volumetric hardening, was recommended. Product Description popup.authors Кравчишин Тарас Миронович Лаврись Сергій Мирославович Лопушанський Василь Антонович Лук'яненко Олександр Геннадійович Проскурняк Роман Васильович Ткачук Олег Володимирович Труш Василь Степанович popup.nrat_date 2020-04-02 Close