Authors & Affiliations
Chebyshev V.D., Kudashov D.V., Orlov Yu.A., Soloviev N.P.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia
Chebyshev V.D. – Research Engineer. Contacts: 1, pl. Bondarenko, Obninsk, Kaluga region, Russia, 249033. Tel.: +7 (484) 399-89-49; e-mail:
Solovyov N.P. – Head of the Group.
Kudashov D.V. – Chief Soldering Technologist.
Abstract
High-temperature soldering is a promising method of joining reactor materials used in the details of the core and the first circuit of nuclear power plants. However, at the moment there is very little information about the corrosion resistance of soldered joints of parts of nuclear power plants in a lead-bismuth coolant environment. Materials science studies in this work were carried out to obtain data on the corrosion resistance of soldered joints. In the work, corrosion tests were carried out in a lead-bismuth melt, for samples of soldered joints soldered with various solders. The aim of the research was to select the solder with the best and most stable mechanical properties and corrosion resistance. Mechanical tests of solder joints with three types of solders were carried out. Metallographic studies of soldered joint grinds and X-ray phase analysis were also carried out. Based on the obtained results of the tensile strength of soldered joints per section, as well as metallographic studies of the grinds, the most promising solder PZHG-20 was selected. The results of the change in the phase composition of the soldered joints were also obtained after the action of the liquid metal coolant Pb-Bi. Based on the results of the conducted research, conclusions were formulated for each type of solder.
Keywords
high-temperature soldering, lead-bismuth coolant, liquid metal corrosion, soldered compositions, soldered compositions strength, metallography of soldered compositions
Article Text (PDF, in Russian)
UDC 669.04
Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2024, no. 1, 1:8