Volgodonsk, Rostov-on-Don, Russian Federation
Bryansk, Bryansk, Russian Federation
Rostov-on-Don, Rostov-on-Don, Russian Federation
Murom, Vladimir, Russian Federation
Murom, Vladimir, Russian Federation
Murom, Vladimir, Russian Federation
BBK 345 Общая технология машиностроения. Обработка металлов
One of the problems of reactor vessel production and operation is to ensure the durability of their welded joints. The large thickness of the reactor walls and, accordingly, the thickness of the weld requires the use of hardening methods that form a hardened surface layer to a great depth. The possibility of using wave deformation hardening to increase negative temperature values of critical brittleness is considered, which, unlike other surface plastic deformation methods, allows controlling a large number of technological factors in a wide range of values, thereby providing the specified parameters of surface layer hardening. A feature of the method is to obtain a depth of the hardened layer reaching 6-10 mm, as well as the formation of both a uniformly and heterogeneously hardened structure. The effect of wave deformation hardening parameters on the impact strength of samples of welded joints made similarly according to the technology and regulations determined during the manufacture of reactor vessel welds are studied comprehensively. The modes of wave deformation hardening are found out, which form a heterogeneously hardened structure, contributing to an increase in negative temperatures of the critical fragility of reactor welds. The research results open up prospects for further study of the possibility to use wave deformation hardening to improve the operational properties of reactor vessel welds.
hardening, wave, deformation, impact strength, temperature, vessel, reactor
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