The Paton Welding Journal, 2018, №03



2018 №03 (03)

DOI of Article 10.15407/tpwj2018.03.04

2018 №03 (05)

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The Paton Welding Journal, 2018, #3, 20-24 pages
 

Influence of rare-earth elements on the structure and properties of welds of vt22 titanium alloy

S.L. Schwab, I.K. Petrychenko And 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
 
Abstract
The paper presents the results of investigations of the influence of rare-earth metal fluorides on structural changes in weld metal of titanium alloy VT22 for the purpose of using them in the flux filler of experimental flux-cored wire for welding this alloy. It was shown that refinement of b-grains is observed in welds made by argon-arc welding of VT22 alloy over a layer of flux, consisting of rare-earth metal fluorides. Addition of LaF₃ to the core of 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 2 times up to 30.6 J/cm². 8 Ref., 4 Tables, 5 Figures.
Keywords: VT22 titanium alloy, rare-earth metal, fluorides, flux-cored wire
 
Received: 13.01.18
Published: 12.04.18
 
 
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