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Effect of electric parameters of arc surfacing using self-shielding flux-cored wires on process stability and base metal penetration was investigated. The experiments were carried out with computer registration of electric parameters of surfacing. The results of oscillogram processing were used for plotting of Iw and Uw diagrams with outlined areas of stable process of surfacing, short circuits and arc extinctions. Coefficient of process instability γ was derived from received real parameters of arc surfacing using flux-cored wire. It is determined that voltage has the largest effect on stability indices and its rise improves process stability. Effect of modes of surfacing on penetration and portion of base metal in the deposited metal was investigated. 3D chart was plotted on estimation results. An area of optimum modes, providing sufficient stability of the process at minimum penetration and good formation of deposited beads, is outlined. 4 Ref., 2 Tables, 7 Figures.

Effect of electric parameters of arc surfacing using flux-cored wire on process stability and base metal penetration