elasticity, plasticity, hardening, viscosity, temperature stresses, phase transitions, heataffected zone

An improved mathematical model is presented for calculating residual stresses in a material that are formed as a result of thermal effects in automatic welding processes under a layer of reflux at the junction of extended steel elements. The model contains the parameters of viscosity and strain hardening in the criteria of plastic flow. It is based on the methods of numerical investigation of the surfacing process, which assumes that the material of the plates is solid and is deformed elastoplastic. The formulation of a thermal problem in modeling the process of deformation in the heat-affected zone is possible in one case when there is a need for a regional effect at the ends of long plates. In the mathematical interpretation of the problem, the length of the mating plates is read infinitely large, and the width is the same. The efficiency of the computational mathematical model is confirmed by a comparable experimental value obtained as a result of calculations.

Tkacheva Anastasia Valerevna, Senior Researcher, Institute of Machine science and Metallurgy, Komsomolsk-on-Amur, Russia,

Zhilin Sergey Gennadievich, Leading Researcher, Candidate of Technical Sciences, assistant professor, Institute of Machine science and Metallurgy, Komsomolsk-on-Amur, Russia, Abashkin Evgeny Evgenievich, Junior Researcher, Institute of Machine science and Metallurgy, Komsomolsk-on-Amur, Russia,

Komarov Oleg Nikolaevich, Acting Director, Candidate of Technical Sciences, assistant professor, Institute of Machine science and Metallurgy, Komsomolsk-on-Amur, Russia.