Investigation of the influence of technological parameters of heat treatment on microstructure of brazing joints of VT20 alloy with VPr16 solder

Afanasiev-Khodykin A.N., Galushka I.A., Sviridov A.V., Naprienko S.A.
UDC
621.791
DOI
10.18577/2307-6046-2024-0-5-3-12
Article PDF (Russian) (999.79 KB)
How to cite
Afanasiev-Khodykin A.N., Galushka I.A., Sviridov A.V., Naprienko S.A. Investigation of the influence of technological parameters of heat treatment on microstructure of brazing joints of VT20 alloy with VPr16 solder // Proceedings of VIAM. 2024. No. 5. DOI: 10.18577/2307-6046-2024-0-5-3-12. URL: https://test.viam.ru/en/journal/2024/5/1
Keywords
brazing, high-temperature brazing, titanium based brazing alloy, titanium alloys, high-alloy solders, microstructure of a brazing seam
Abstract

The results of investigation of the influence of the assembly gap width on the microstructure of brazing joints of pseudo-α-alloy VT20 with VPr16 solder are presented. The soldered samples after brazing and subsequent homogenization heat treatment (HHT) are analyzed. The main types of microstructures formed in the solder joint are identified and regression equations of the influence of the gap width and duration of the HHT on the main transition points of the solder joint microstructure are constructed. The dynamics of change of alloying elements (aluminum, zirconium, copper and nickel) in the solder joint and diffusion zone has been studied. The optimum microstructure is selected, which does not have a boundary in the center of the seam and boundaries of the junction of crystals.

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