2018 №03 (03) DOI of Article
2018 №03 (05)

Automatic Welding 2018 #03
Avtomaticheskaya Svarka (Automatic Welding), № 3, 2018, pp. 23-28

S.L. Schwab, I.K. Petrychenko, S.V. Akhonin
E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
Influence of rare-earth elements on structure and properties of welds of titanium alloy VT22
The article presents the results of investigations of influence of rare-earth metal fluorides on structural changes in the metal of a titanium alloy VT22 for the purpose of using them in the flux filler of an experimental flux-cored wire for welding this alloy. It was shown that in welds made by argon-arc welding on VT22 alloy along the flux consisting of fluorides of rare-earth metals, the refinement of β-grains is observed. The introduction of LaF3 into the core of the experimental flux-cored titanium wire PPT-22 in combination with heat treatment allowed increasing the impact toughness of welds in argon-arc welding of VT22 alloy by 2 times — to 30.6 J/cm2. 8 Ref., 4 Tabl., 5 Fig.
Keywords: titanium alloy VT22, rare-earth metals fluorides, flux-cored wire
  1. (2003) Titanium and titanium alloys. Fundamentals and applications. Ed. by C. Leyens. Germany, Wiley-VCH. https://doi.org/10.1002/3527602119
  2. Inozemtsev, A.A., Bashkatov, I.G., Koryakovtsev, A.S. (2010) Modern titanium alloys and problems of their development. Moscow, VIAM [in Russian].
  3. Gurevich, S.M., Zamkov, V.N., Blashchuk, V.E. et al. (1986) Metallurgy and technology of welding of titanium and its alloys. 2nd ed. Kiev, Naukova Dumka  [in Russian].
  4. (1977) Diagrams of meltability of salt systems: Refer. book; Pt 1. Ed. by Posypajko, V.I. et al. Moscow, Metallurgiya [in Russian].
  5. Prilutsky, V.P., Schvab, S.L., Petrychenko, I.K. et al. (2016) Argon arc welding of titanium VT22 alloy using filler flux-cored wire. The Paton Welding J., 9, 9-13. https://doi.org/10.15407/tpwj2016.09.02
  6. Gurevich, S.M., Zamkov, N., Zagrebenyuk, S.D. et al. (1964) Influence of fluxes containing rare-earth elements on structure and properties of welds of VT15 alloy. Avtomatich. Svarka, 4, 93-94 [in Russian].
  7. Grabin, V.F. (1975) Basics of physical metallurgy and heat treatment of welded joints from titanium alloys. Kiev, Naukova Dumka [in Russian].
  8. Lyasotskaya, V.S. (2003) Heat treatment of welded joints from titanium alloys. Moscow, Ekomet [in Russian].