Registration Number
0221U107256,
0121U110447
, R & D reports
Title
Improving the reliability, service life and competitiveness of steam turbines of Ukrainian NPPs by the novel complex ion-plasma modification of working surfaces of large steel parts of the steam distribution system and blades made of titanium alloy Ti6Al4V
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Head
Bilous Vitalii A., Доктор технічних наук
Registration Date
30-12-2021
Organization
National Science Center "Kharkiv Institute of Physics and Technology"
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Vacuum-arc equipment has been modernized and the electrical circuit of protection against microarcs has been improved for the development of processes of complex ion-plasma hardening of large-sized massive parts of turbine steam distribution mechanisms. Improving the design of the arc enhanced glow discharge (AEGD) eliminated its overheating, improved the stability of combustion of the glow discharge during nitriding. Modernization of equipment for AEGD and optimization of processing modes in the glow discharge allowed to increase the ion current density on the substrate up to 10 times, which significantly increased the efficiency of ion nitriding and heating the massive part, and reduce processing time.
The rate of destruction of samples of titanium alloys VT1-0, TC5, VT6, VT14, OT4 under the action of cavitation was determined. It was found that the increase in hardness and improvement of cavitation resistance for these alloys depends on the alloying elements, and also increases after heat treatment and ion-plasma modification of the sample surface. Due to the ion-plasma modification of the alloys, the resistance to cavitation wear increases several times, in particular the alloy VT6 3 times. The phase composition of the samples before and after the ion-plasma modification was studied and it was found that the resistance of the alloy to cavitation significantly depends on it.
Product Description
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Antonenko Mykola I.
Bilous Vitalii A.
Besedina Yuliya O.
Domnich Igor S.
Zadniprovskiy Yuriy O.
Klimenko Illya O.
Kovalenko Volodymyr I.
Komar Anatoliy A.
Kudina Valeria Yu.
Kuprin Oleksandr S.
Leonov Sergiy O.
Lymar Raisa I.
Marinin Volodymyr G.
Moskalets Ivan M.
Ovcharenko Valeriy D.
Petrenko Olena L.
Rostova Hanna Yu.
Khomyakov Igor A.
Cherkasov Volodymyr I.
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2022-03-09
