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2019 №11 (02) DOI of Article
10.15407/tpwj2019.11.03
2019 №11 (04)

The Paton Welding Journal 2019 #11
TPWJ, 2019, #11, 12-18 pages
 
Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                      0957-798X (print)
Issue                       #11, 2019 (November)
Pages                      12-18

Self-organization of thermal processes in welding sheet low-alloyed steel

R.A. Krektuleva, Yu.N. Saraev, V.M. Semenchuk and R.O. Cherepanov
Institute of Strength Physics and Materials Science of SB RAS 2/4 Akademichesky Ave., 634050, Tomsk, RF

Numerical modeling of thermal processes at weld pool formation in low-alloyed steel under the impact of the electric arc was performed. Different arcing modes are considered. A qualitative difference in propagation and dissipation of thermal energy is found, depending on the modes. Mechanisms of self-organization of thermal structures were studied, which are due to highly nonlinear thermophysical properties of low-alloyed steel, modes of thermal energy feeding into the weld pool and features of its dissipation on the boundaries. The validity of the numerical model is confirmed experimentally, that allows recommending the results of computer studies for practical application. 14 Ref., 7 Figures.
Keywords: weld, contact zone, heat flow, nonlinearity of thermophysical properties, synergism, self-organization, internal structure
 
Received:                08.07.19
Published:               21.12.19
 

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