ОПТИМАЛЬНЫЕ ПАРАМЕТРЫ ПРОДОЛЬНОГО МАГНИТНОГО ПОЛЯ, ОБЕСПЕЧИВАЮЩИЕ ПЕРЕМЕШИВАНИЕ РАСПЛАВА В ВАННЕ ПРИ ЭЛЕКТРОДУГОВОЙ НАПЛАВКЕ

Abstract

Urgency of the research. One of the ways to improve the submerged arc surfacing process efficiency with wire is to use a control longitudinal magnetic field. (LMF). It is possible to control the geometrical dimensions of the surfaced beads, the electrode wire melting productivity increases, grinding of the structural components of the weld metal is achieved. Target setting. For effective mixing of the melt in the bath in arc surfacing with the act of the LMF, it is necessary for the melt to reach the extreme points of the tail end of the weld bath. It is necessary to determine the velocity of flows induced in the melt under the action of LMF for different frequencies and induction LMF. Actual scientific researches and issues analysis. It has been shown in recent publications that for grinding the structural components of the surfaced metal and increasing its service characteristics during arc surfacing with the act of alternating LMF, it is necessary to ensure the mixing of the melt in the bath along its entire length. Uninvestigated parts of general matters defining. The works that would deal with the mixing of the melt in the bath along its entire length during arc surfacing with the act of the alternating LMF are practically absent. The research objective. Determination of the optimal parameters of the alternating LMF, which would ensure effective mixing of the metal in the bath at submerged arc surfacing (welding) with wire. The statement of basic materials. It was assumed in the calculation method that through the head of the bath (before the arc) 90% of the total surfacing current. The dimensions of the recess (crater) under the arc in the liquid metal are determined with the help of refractory inserts. The values of velocity and acceleration, which reaches the liquid metal under the action of alternating LMF are determined. Conclusions. The optimal values of induction and frequency of LMF, providing effective mixing of the melt in the bath at submerged arc surfacing are determined.