The Paton Welding Journal, 2025, №01

2025 №01 (03)

DOI of Article 10.37434/tpwj2025.01.04

2025 №01 (05)

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The Paton Welding Journal, 2025, #1, 21-27 pages

Mastering the technology of producing ingots from heat-resistant alloys KhN38VT and KhN60VT by the electron beam melting method

S.V. Akhonin¹, V.O. Berezos¹, M.I. Medvedev², O.S. Bobukh², D.S. Ivanov³, O.G. Yerokhin¹

¹E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: titan.paton@gmail.com
²Ukrainian State University of Science and Technologies 2 Lazaryan Str., 49010, Dnipro, Ukraine
³Zaporizhzhia Casting-Mechanical Plant 72 Pivdenne Prosp., 69008, Zaporizhzhia, Ukraine

Abstract
In order to optimize the technology of production of nickel- and iron-based heat-resistant alloys, the E.O. Paton Electric Welding Institute conducted melting of a batch of ingots of Kh38VT and Kh60VT grades. The ingots were produced using the technology of cold hearth electron beam melting and portioned feed of liquid metal to a water-cooled crucible. The conducted work showed that the electron beam melting method allows producing high-quality defect-free ingots of nickel-based heat-resistant alloys that meet the requirements of the standards, and it can be used instead of secondary vacuum-arc remelting. When using ingots of primary induction remelting as the initial charge billet, it is not necessary to add alloying elements with high vapor pressure to ensure a chemical composition that meets GOST 5632‒72. In addition, the level of mechanical properties of KhN60VT alloy bars almost completely satisfies the requirements of TU 14-3-571‒2004 on “Seamless cold-deformed pipes from the KhN60VT (EI868) alloy and KhN60VT-VD alloy for the aviation industry”.
Keywords: heat-resistant alloy, charge billet, ingot, electron beam melting, cold hearth, refining, impurities, metal quality

Received: 06.08.2024
Received in revised form: 11.09.2024
Accepted: 23.01.2025

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Suggested Citation

S.V. Akhonin, V.O. Berezos, M.I. Medvedev, O.S. Bobukh, D.S. Ivanov, O.G. Yerokhin (2025) Mastering the technology of producing ingots from heat-resistant alloys KhN38VT and KhN60VT by the electron beam melting method. The Paton Welding J., 01, 21-27.

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