Issues »  Volume 41, Issue 11

Investigation of the Effect of Alloying by the Elements of IV–V Groups of the Periodic System on the Temperature Intervals of the Melting of Nickel Brazing Filler Metals

S. Maksymova, V. Voronov, P. Kovalchuk

E. O. Paton Electric Welding Institute, NAS of Ukraine, 11 Kazymyr Malevych Str., UA-03150 Kyiv, Ukraine

Received: 10.06.2019. Download: PDF

Using differential thermal analysis, the melting intervals of experimental nickel brazing filler metal for brazing heat-resistant nickel alloys are determined. Based on experimental data and using statistical analysis methods, liquidus surfaces of brazing filler metal data are constructed depending on the content of elements of the IV–V groups of the periodic system in their composition. As shown, the effect of zirconium on the liquidus temperature of experimental alloys is non-linear and depends on the content of other adhesive-active elements (Ti, Nb) in them. The most active lowering of the liquidus temperature in the Ni–Cr–Co–Mo–W–Al–Ti–Nb–(Zr) alloys occurs when the ratio of the elements are Ti:Nb = 1:1 and Ti:Nb = 1:2. The results of local micro X-ray analysis demonstrate that, when brazing joining from the heat-resistant nickel alloy ZhS6U multicomponent brazing filler metal containing up to 13% wt. zirconium in a brazed seam, the structure consisting of grains of a solid solution, the Ni$_5$Zr phase, a small amount of the eutectic component, and the phase enriched in carbon and tungsten is formed.

Key words: high-temperature differential thermal analysis, solidus and liquidus temperatures, brazing filler metal, foundry superalloy ZhS6U, brazing.

URL: http://mfint.imp.kiev.ua/en/abstract/v41/i11/1539.html

DOI: https://doi.org/10.15407/mfint.41.11.1539

PACS: 61.66.Dk, 61.72.Ff, 61.72.S-, 62.20.Qp, 81.05.Bx, 81.30.Fb

Citation: S. Maksymova, V. Voronov, and P. Kovalchuk, Investigation of the Effect of Alloying by the Elements of IV–V Groups of the Periodic System on the Temperature Intervals of the Melting of Nickel Brazing Filler Metals, Metallofiz. Noveishie Tekhnol., 41, No. 11: 1539—1547 (2019) (in Russian)

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