РАСЧЕТ ХАРАКТЕРИСТИК ЗНАКОПЕРЕМЕННОГО ПОПЕРЕЧНОГО МАГНИТНОГО ПОЛЯ, ВЛИЯЮЩЕГО НА ПЕРЕНОС КАПЕЛЬ ПРИ ДУГОВОЙ СВАРКЕ И НАПЛАВКЕ

It is shown that in submerged-arc surfacing with the impact of constant transverse magnetic field the coefficient of melting of electrode wires of 3-5 mm diameter increases by 25 – 30%. It is experimentally established that at the impact of an alternating field at unchanged level of the transverse component of induction, the effect of increase of the coefficient of melting depends on the frequency of this field. At increase of the field frequency up to 10 – 20 Hz, the increment of the coefficient of melting decreases to zero values. A procedure was developed for determination of the minimum level of transverse component of field induction in the electrode drop zone, at which the drop is detached from the melting electrode tip. It is shown that the effect of lowering of the coefficient of melting at increase of the field frequency is due to reduction of pulse duration. The paper gives the calculated data, allowing determination of optimum values of induction and frequency of the alternating field, at which the coefficient of wire melting at submerged-arc surfacing (welding) is increased. 8 Ref., 4 Fig. [ABSTRACT FROM AUTHOR]