Features of formation of microstructure of soldered joints of nickel super alloys with iridium

Sviridov A.V., Afanasiev-Khodykin A.N., Galushka I.A.
UDC
621.791.3
DOI
10.18577/2307-6046-2025-0-7-13-35
Article PDF (Russian) (3.35 MB)
How to cite
Sviridov A.V., Afanasiev-Khodykin A.N., Galushka I.A. Features of formation of microstructure of soldered joints of nickel super alloys with iridium // Proceedings of VIAM. 2025. No. 7. DOI: 10.18577/2307-6046-2025-0-7-13-35. URL: https://test.viam.ru/en/journal/2025/7/2
Keywords
brazing, high-temperature brazing, nickel brazing alloys, iridium spark plugs, high-alloyed brazing alloys, microstructure of the brazed joints
Abstract

The results of investigation of the influence of solder composition on the formation of the soldered joint of iridium contacts of spark plugs with CH60VT alloy as the material of the contact holder are presented. The comparison of the soldered joint formed by serial solder VPr50 and experimental solders after soldering and holding for three hours at 1000 °C has been carried out. The main phase components capable of leading to decrease of long-term strength of soldered seam during operation have been revealed. The regularities of redistribution of elements in the soldered joint and diffusion zones have been determined due to decrease of erosion activity of solder in relation to iridium and alloy KhN60VT.

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