Abstract
Methods of controlling crystallization of the weld pool metal under external mechanical impact have been considered. There is performed an analysis of the factors influencing the process of melt crystallization when low-frequency oscillations are applied. The role of wave acceleration in determining the parameters of the control action is shown. There are presented the relationships between the parameters of low-frequency oscillations and the natural frequency of crystallization of the bath metal, which are necessary for obtaining a fine-grained structure of the weld.
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