The Paton Welding Journal, 2018, №07



2018 №07 (01)

DOI of Article 10.15407/tpwj2018.07.02

2018 №07 (03)

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The Paton Welding Journal, 2018, #7, 10-14 pages
 

Electron beam welding and heat treatment of welded joints of high-strength pseudo-β titanium alloy VT19

S.V. Akhonin, V.Yu. Belous, R.V. Selin, E.L. Vrzhyzhevsky and I.K. PetrYchenko

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
 
Titanium pseudo-b titanium alloys have high strength reaching 1200-1400 MPa in aged state, as well as high adaptability to manufacture in comparison with alloys of pseudo-a- or (a + b)-structure. Such advantages of pseudo-b titanium alloys, typical representative of which is high alloy VT19, make this class of titanium alloys promising for application in new technologies and equipment and during modernization of existing ones. The paper has studied the effect of mode of electron beam welding, modes of preheating and local heat treatment, as well as furnace annealing on properties of welded joints of pseudo-b titanium alloy VT19 produced by electron beam welding. Variation of speed of electron beam welding of alloy VT19 does not allow changing within the significant limits the relation between a- and b-phases in weld metal and heat-affected zone. Electron beam welding in combination with preheating allows regulating the relation between a- and b-phases in welded joint metal and reducing the content of b-phase in weld metal of alloy VT19 from 91 to 53 % , as well as increasing the strength of welded joints from 876 to 937 MPa. 11 Ref., 2 Tables, 6 Figures.
Keywords: titanium, titanium alloys, pseudo-β titanium alloys, electron beam welding, structure, properties, local heat treatment, annealing, strength
 
Received:                01.06.18
Published:               31.07.18
 
 
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