Automatic Welding, 2025, №01

2025 №01 (02)

DOI of Article 10.37434/as2025.01.03

2025 №01 (04)

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"Avtomatychne Zvaryuvannya" (Automatic Welding), #1, 2024, pp. 13-22

Regarding the issue of determining the quantitative phase composition of the metal of welded joints of duplex steels

G.V. Fadeeva¹, S.Yu. Maksymov¹, Chuanbao Jia², D.V. Vasiliev¹, A.A. Radzievska¹

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: maksimov@paton.kiev.ua
²MOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Institute of Materials Joining, Shandong University, Jinan 250061

The article considers the main methods and techniques that exist today for quantitative determination of the phase composition of metal in welded joints of high-alloy and duplex stainless steels (DSS). The expediency of using one or another method in different cases is analyzed. The article presents the results of the analysis of the influence of cooling rate on the structure and phase composition of weld metal and HAZ in welding of high-alloy chromium-nickel steels and duplex stainless steels. It is shown that due to the influence of high cooling rates, such as during welding in aqueous medium, the amount of ferritic component in the weld metal and deposited metal of high-alloy steels decreases, whereas in the weld metal and HAZ of duplex steels, on the contrary, the amount of austenitic component decreases. This depends on the type of metal crystallization. These data explain the differences in determining the phase composition of weld metal and deposited metal at the same alloying during welding in different environments. The main advantages and disadvantages of various methods and techniques for quantitative determination of the phase composition of welded joints of high-alloy and duplex steels are shown. 28 Ref., 6 Tabl., 7 Fig.
Keywords: high-alloy chromium-nickel steels, duplex steels, phase composition, austenite, ferrite, cooling rate, methods for quantitative determination of phase composition


Received: 25.09.2024
Received in revised form: 29.10.2024
Accepted: 15.01.2025

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