The Paton Welding Journal, 2021, №10



2021 №10 (07)

DOI of Article 10.37434/tpwj2021.10.08

2021 №10 (01)

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The Paton Welding Journal, 2021, #10, 52-56 pages

Production of titanium ingots with regulated oxygen content by electron beam melting

S.V. Akhonin¹, O.M. Pikulin¹, V.O. Berezos¹, A.Yu. Severin¹ and O.G. Erokhin²

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
²SC «SPC «Titan» of the E.O. Paton Electric Welding Institute of the NASU» 26 Raketna Str., 03028, Kyiv, Ukraine

Abstract
Comprehensive research work was performed to produce ingots of Grade 2 titanium alloy of 600 mm diameter with regulated oxygen content of 0.12–0.16 % and an ingot of Grade 3 titanium alloy of 1100 mm diameter and up to 3 m length by the method of electron beam cold-hearth melting in the production facilities of SC «SPC «Titan» of the E.O. Paton Electric Welding Institute of the NAS of Ukraine» in multifunctional electron beam unit UE5810. A method of forming the charge billet and a formula for calculation of the amount of TiO2 powder for alloying are proposed. Defectfree ingots of titanium alloys of Grade 2 and Grade 3 with regulated oxygen content were produced and the range of deviation of its distribution in the ingot metal of ± 0.02 % was provided. It is shown that the proposed modes of electron beam heating of the consumable billet, metal melting in the cold hearth and in the mould, as well as the melting rate ensure complete dissolution of titanium dioxide particles in the cold hearth, and absence of defects in the produced ingots, enriched in oxygen.
Keywords: electron beam cold hearth melting; electron beam unit; titanium ingot; oxygen; regulated oxygen content; titanium dioxide; melting rate; macrostructure

Received: 22.06.2021
Accepted: 11.11.2021

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