The Paton Welding Journal, 2009, №06

2009 №06 (03)

2009 №06 (05)

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The Paton Welding Journal, 2009, #6, 14-23 pages

Features of solidification of complex-alloyed filler metals for brazing high-temperature nickel alloys

V.V. Kurenkova, L.K. Doroshenko, I.S. Malashenko

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
Applicability of differential thermal analysis to determine the character of phase transformations in boron- and silicon-containing filler metals intended for brazing of casting nickel alloys has been considered in relation with the results of microstructureand X-ray spectrometry analyses. The efficiency of adding 20 % powder (Ni-12 % Si) of eutectic composition to boron-containing filler metal (Ni-Co-Cr-Al-2.5 % B) is shown. Silicon disperses carboboride eutectics precipitating in the brazed seam metal and depresses the heterogenization of its structure, thus favouring improvement of physical-mechanical properties of the brazed joints.
Keywords: high-temperature brazing, high-temperature nickel alloys, seam metal, boron- and silicon-containing filler metal, powder filler, differential thermal analysis, DTA curve, X-ray diffraction analysis, diffractogram, structure heterogenization

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Suggested Citation

V.V. Kurenkova, L.K. Doroshenko, I.S. Malashenko (2009) Features of solidification of complex-alloyed filler metals for brazing high-temperature nickel alloys. The Paton Welding J., 06, 14-23.

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