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The results of investigations of the effect of the amount and composition of the exothermic mixture in the filler of the powder strips, produced with different rolling parameters, on the melting parameters and the transition of alloying elements from the powder strip to the deposited metal are presented. optimum rolling parameters in the composition of the exothermic mixture.The investigations were carried out on single-lock powder strips (GOST 26 467-85) based on the 08KP steel sheath and the filler made of the powder of the complexly alloyed alloy PG-L101 (analogue of PL-AN 101) with the filling factor of 54-56%. The exothermic addition was the Fe 2 O 3 -FeTi-Al-Mg mixture in the amount from 10% to 30% by mass of the filler. The fractional composition of the powder of the core was '−0.28 + 0.16' × 10 −3 m. When producing the powder strip, the compression force in the two-roll stand of the mill was changed from 25 to 35 kN at a constant drawing speed of 0.05 m/s. Surfacing was carried out at the constant parameters: welding current 500-550 A; arc voltage 27-30 V; deposition rate 30 m/h; electrode extension 40 × 10 −3 m. The melting parameters of the powder strip were studied.Analysis of the experimental results shows that the increase in the amount of haematite in the filler from 6% to 12% increases the surfacing productivity as a result of decreasing the heat conductivity of the filler and reducing the iron from the oxide and ferrotitanium. The losses of the powder strip through splashing were lower as a result of rolling with a compression force of 35 kN and the haematite content in the range 6-10%. A further increase in the amount of haematite and the exothermic addition in the filler destabilised the arc process as a result of the high rate of the oxidation-reduction reactions at the tip of the melting electrode.One of the factors that determine the uniformity of melting of the components of the filler is the fraction composition of the components [5]. The rate of the reaction can be regulated by changing the dimensions of

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