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2020 №11 (01) DOI of Article
2020 №11 (03)

Automatic Welding 2020 #11
Avtomaticheskaya Svarka (Automatic Welding), #11, 2020, pp. 9-13

Nature of distribution of non-metallic inclusions in structural components of weld metal while using arc welding methods

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

In order to give an expert evaluation of properties of welded joints, for today, a large number of computerized programs were developed to predict the structural composition of weld metal and their mechanical properties. Usually, such programs are based on multifactor analysis of the processes occurring in the welding arc, thermodynamics and kinetics of processes in the welding pool. It should be noted that during the analysis of crystallization and recrystallization reactions in the weld metal in such programs, as a rule, the nature of the distribution of non-metallic inclusions in the structural components is not taken into account. There are many studies that show a noticeable effect of inclusions depending on whether they are present at the boundaries or in the body of the grains. The need to take into account the probability of finding non-metallic inclusions in the body of structural grains or at their boundaries during the formation of numerical models, which will increase the compliance of the predicted data with experimental results of determining the mechanical properties of weld metal. 5 Ref., 5 Fig. Key words: metallurgical science, low-alloy steels, welds, microstructure, numerical modeling, non-metallic inclusions

Received: 19.10.2020


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