The Paton Welding Journal, 2023, №06



2023 №06 (02)

DOI of Article 10.37434/tpwj2023.06.03

2023 №06 (04)

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The Paton Welding Journal, 2023, #6, 18-23 pages

Narrow-gap TIG welding of thick steel 20

S.V. Akhonin, V.Yu. Bilous, R.V. Selin, V.V. Pashynskyi, S.L. Shvab

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

Abstract
Arc welding of joints of carbon steels 20...100 mm thick can be performed both by consumable and nonconsumable electrode, using shielding gases or flux. In order to increase the efficiency of welding operations, multilayer narrow-gap welding with filler wire feeding can be used for metals of medium and large thicknesses. This study deals with application of narrow-gap tungsten electrode welding with and without application of a controlling magnetic field for welding samples from steel 20 of 40 mm thickness. Results of investigations of the macro- and microstructure and microhardness of the welded joints are given. It was found that application of an external magnetic field for narrow-gap welding of steel 20 joints ensures a higher quality of the welded joints. 14 Ref., 8 Fig.
Keywords: narrow-gap argon-arc welding, tungsten electrode, steel 20, controlling magnetic field, structure, microstructure, microhardness

Received: 16.05.2023
Accepted: 17.07.2023

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