Automatic Welding, 2019, №01



2019 №01 (04)

DOI of Article 10.15407/as2019.01.05

2019 №01 (06)

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Avtomaticheskaya Svarka (Automatic Welding), #1, 2019, pp. 40-43

Effect of magnetic field on crystallization of welds in arc welding

A.D. Razmyshljaev¹, M.V. Ageeva²

¹State Higher Eductation Instittue Pryazovskyi State Technical University. 7 Universitetskaya Str., 87500, Mariupil, Ukraine. Е-mail: razmyshljаеу@gmail.com
²Donbass State Machine Building Academy. 72 Akademicheskaya Str., 84313, Kramatorsk, Ukraine. Е-mail: maryna_ah@ukr.net

A review of publications on metallurgical and casting industry showed that analyzing the properties of liquid metals and alloys, many authors proceed from the notions of their cluster structure. The cluster structure of the liquid is a hypothesis, but it is confirmed by investigations of diffractions of X-rays, electrons and neutrons reflected from its surface. The work considers the existing notions about the fact, that a cluster is a crystal-like concentration of atoms. Around the clusters a softening zone exists, which consists of disordered atoms, the volume of which does not exceed 3...5 %, and this provides the fluidity of many melts. The authors of publications achieved successes in explaining the forming structure of ingots, based on the cluster mechanism of the process of crystallization of liquid metals and alloys. The authors of this work suggested that overheated molten metal at the head part of the pool, which has smaller clusters, moves under the action of magnetic fields to its tail part, and provides a refinement of the primary structure of the weld metal. 20 Ref., 1 Fig.
Keywords: welding, weld pool, magnetic field, cluster, weld structure, crystallization

Received: 23.10.2018
Published: 20.12.2018

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