The Paton Welding Journal, 2018, №03

2018 №03 (03)

DOI of Article 10.15407/tpwj2018.03.04

2018 №03 (05)

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TPWJ, 2018, #3, 20-24 pages
 
Influence of rare-earth elements on the structure and properties of welds of vt22 titanium alloy


Journal The Paton Welding Journal
Publisher International Association «Welding»
ISSN 0957-798X (print)
Issue #3, 2018 (March)
Pages 20-24
 
 
Authors
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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