TPWJ, 2019, #2, 19-21 pages
Journal The Paton Welding Journal
Publisher International Association «Welding»
ISSN 0957-798X (print)
Issue #2, 2019 (March)
Refinement of metal structure in arc surfacing under the effect of longitudinal magnetic field
A.D. Razmyshlyaev1, M.V. Ageeva2 and E.V. Lavrova1
State Higher Education Institute Pryazov State Technical University
7 Universitetskaya Str., 87500, Mariupol, Ukraine. E-mail: email@example.com
Donbass State Machine Building Academy
72 Akademicheskaya Str., 84313, Kramatorsk, Ukraine. E-mail: firstname.lastname@example.org
It is shown that if the deposited iron-based metal contains less than 0.15 % carbon, and more than 16 % chromium, then during its crystallization austenitic dendrites will form at the stage of primary crystallization, and during further cooling austenite will be transformed into ferrite. In this case, ferrite is formed within the boundaries of austenitic dendrites, and further on it does not undergo polymorphic transformations. Taking this statement into account, the deposits were produced using flux-cored wire, which provided carbon content of 0.08 % and that of chromium of 17–19.5 % in the deposits. The deposits were made without the effect of a longitudinal magnetic field and under the effect of this alternating field of 6, 12, 24 and 33 Hz frequency. Studies of macro- and microstructure of the deposited metal showed that under the effect of the magnetic field in the frequency range of 6–24 Hz, a significant decrease in the width and length of dendrites was observed in the deposited metal structure. The conclusion was made that refinement of the structure (of dendrites) during submerged-arc surfacing with wire is caused by movement of liquid metal in the pool under the effect of the magnetic field, and the influence on primary crystallization, and not on the stage of polymorphous transformations of metal in the solid state. 4 Ref., 1 Table, 3 Figures.
Keywords: arc surfacing, magnetic field, crystallization, dendrite, austenite, ferrite
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2. Razmyshlyaev, A.D., Ageeva, M.V. (2018) On mechanism of weld metal structure refinement in arc welding under action of magnetic fields (Review). The Paton Welding J., 3, 25–18. https://doi.org/10.15407/tpwj2018.03.05
3. Lakhtin, Yu.M. (1977) Metals science and heat treatment of metals. Moscow, Metallurgiya [in Russian].
4. Bagryansky, K.V., Dobrotina, Z.A., Khrenov, K.K. (1976) Theory of welding processes. Kiev, Vyshcha Shkola [in Russian].